new playAnimationUntil that stops animation when notify channel receives message

.devcontainer/devcontainer.json

@@ -0,0 +1,25 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/go
+{
+	"name": "Go",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/go:1-1.21-bullseye",
+	"features": {
+		"ghcr.io/devcontainers/features/docker-in-docker:2": {}
+	}
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "go version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.gitea/workflows/build.yaml

@@ -0,0 +1,40 @@
+name: build lightwatch
+run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
+on: 
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - ".gitea/workflows/**"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: 
+      image: registry.local/catthehacker:act-latest-wagnerca
+      volumes:
+        - /var/run/user/1000/docker.sock:/var/run/docker.sock
+        - /var/run/secrets/kubernetes.io/serviceaccount:/var/run/secrets/kubernetes.io/serviceaccount
+      env:
+        KUBERNETES_PORT: "tcp://10.43.0.1:443"
+        KUBERNETES_PORT_443_TCP: "tcp://10.43.0.1:443"
+        KUBERNETES_PORT_443_TCP_ADDR: "10.43.0.1"
+        KUBERNETES_PORT_443_TCP_PORT: "443"
+        KUBERNETES_PORT_443_TCP_PROTO: "tcp"
+        KUBERNETES_SERVICE_HOST: "10.43.0.1"
+        KUBERNETES_SERVICE_PORT: "443"
+        KUBERNETES_SERVICE_PORT_HTTPS: "443"
+        BUILDKIT_HOST: "docker-container://wagner-buildkitd"
+    steps:
+      - uses: actions/checkout@v3
+      - run: docker buildx create --use --name=wagner-buildkitd --driver=remote
+      - run: docker buildx ls
+      - name: short-sha
+        id: short-sha
+        run: echo "short-sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+      - run: |
+             docker buildx build . \
+             -t registry.local/rgbarm64lib:${{ steps.short-sha.outputs.short-sha }}   \
+             -t registry.local/rgbarm64lib:latest \
+             --platform=linux/arm64,linux/amd64 \
+             --push

Dockerfile

@@ -7,10 +7,10 @@ RUN apk add git make g++
 RUN go mod tidy -e
 RUN go mod vendor
 RUN mkdir -p /usr/local/include
-WORKDIR /usr/src/app/vendor/rpi-rgb-led-matrix/
-RUN git submodule update --init
+WORKDIR /usr/src/app/depends/rpi-rgb-led-matrix/
+#RUN git submodule update --init
 RUN make
 WORKDIR /usr/src/app
-RUN go install -v ./...
-RUN cp /usr/src/app/vendor/rpi-rgb-led-matrix/include/* /usr/local/include
-RUN cp /usr/src/app/vendor/rpi-rgb-led-matrix/lib/* /usr/local/lib
+#RUN go install -v ./...
+RUN cp /usr/src/app/depends/rpi-rgb-led-matrix/include/* /usr/local/include
+RUN cp /usr/src/app/depends/rpi-rgb-led-matrix/lib/* /usr/local/lib

Jenkinsfile

@@ -1,25 +0,0 @@
-pipeline {
-agent any
-stages {
-  /*stage('GitCheckOut') {
-	steps{
-	checkout([$class: 'GitSCM', branches: [[name: "${env.CHECKOUT}"]], extensions: [], userRemoteConfigs: [[credentialsId: 'gitea', url: "$GIT_URL"]]])
-	}
-
-}*/ 
- stage('buildPush') {
-	steps{
-	sh 'docker buildx rm jenkins-agent || echo "none there"'
-	sh '''#!/bin/bash 
-		docker buildx create --bootstrap --name=jenkins-agent --driver=kubernetes --driver-opt=namespace=jenkinsagent --driver-opt=qemu.install=true --driver-opt=\\"nodeselector=kubernetes.io/arch=amd64\\" --driver-opt=\\"image=registry.local/buildkit-wagnerca:stable-3-rootless\\"  --use
-	'''
-	sh 'docker buildx build . -t registry.local/rgbarm64lib:v0.0.$BUILD_NUMBER --push --platform=linux/arm64,linux/amd64'
-    sh 'docker buildx build . -t registry.local/rgbarm64lib:latest --push --platform=linux/arm64,linux/amd64'
-	sh 'docker buildx rm jenkins-agent'
- }
-
-
-}
-
-}
-}

depends/rpi-rgb-led-matrix/.editorconfig

@@ -0,0 +1,15 @@
+# Editor config file, see http://editorconfig.org/
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{h,cc}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab

depends/rpi-rgb-led-matrix/.gitignore

@@ -0,0 +1,6 @@
+*.o
+*.a
+*~
+*.so
+.envrc
+.direnv

depends/rpi-rgb-led-matrix/COPYING

@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+License is intended to guarantee your freedom to share and change free
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+General Public License applies to most of the Free Software
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+    (at your option) any later version.
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+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+Public License instead of this License.

depends/rpi-rgb-led-matrix/Makefile

@@ -0,0 +1,35 @@
+# This toplevel Makefile compiles the library in the lib subdirectory.
+# If you want to see how to integrate the library in your own projects, check
+# out the sub-directories examples-api-use/ and utils/
+RGB_LIBDIR=./lib
+RGB_LIBRARY_NAME=rgbmatrix
+RGB_LIBRARY=$(RGB_LIBDIR)/lib$(RGB_LIBRARY_NAME).a
+
+# Some language bindings.
+PYTHON_LIB_DIR=bindings/python
+CSHARP_LIB_DIR=bindings/c\#
+
+all : $(RGB_LIBRARY)
+
+$(RGB_LIBRARY): FORCE
+	$(MAKE) -C $(RGB_LIBDIR)
+	$(MAKE) -C examples-api-use
+
+clean:
+	$(MAKE) -C lib clean
+	$(MAKE) -C utils clean
+	$(MAKE) -C examples-api-use clean
+	$(MAKE) -C $(PYTHON_LIB_DIR) clean
+
+build-csharp:
+	$(MAKE) -C $(CSHARP_LIB_DIR) nuget
+	$(MAKE) -C $(CSHARP_LIB_DIR) build
+
+build-python: $(RGB_LIBRARY)
+	$(MAKE) -C $(PYTHON_LIB_DIR) build
+
+install-python: build-python
+	$(MAKE) -C $(PYTHON_LIB_DIR) install
+
+FORCE:
+.PHONY: FORCE

depends/rpi-rgb-led-matrix/README.md

@@ -0,0 +1,812 @@
+Controlling RGB LED display with Raspberry Pi GPIO
+==================================================
+
+A library to control commonly available 64x64, 32x32 or 16x32 RGB LED panels
+with the Raspberry Pi. Can support PWM up to 11Bit per channel, providing
+true 24bpp color with CIE1931 profile.
+
+Supports 3 chains with many panels each on a regular Pi.
+On a Raspberry Pi 2 or 3, you can easily chain 12 panels in that chain
+(so 36 panels total), but you can theoretically stretch that to up
+to 96-ish panels (32 chain length) and still reach
+around 100Hz refresh rate with full 24Bit color (theoretical - never tested
+this; there might likely be timing problems with the panels that will creep
+up then).
+
+With fewer colors or so-called 'outdoor panels' you can control even more,
+faster.
+
+The LED-matrix library is (c) Henner Zeller <h.zeller@acm.org>, licensed with
+[GNU General Public License Version 2.0](http://www.gnu.org/licenses/gpl-2.0.txt)
+(which means, if you use it in a product somewhere, you need to make the
+source and all your modifications available to the receiver of such product so
+that they have the freedom to adapt and improve).
+
+## Discourse discussion group
+
+If you'd like help, please do not file a bug, use the discussion board instead:
+https://rpi-rgb-led-matrix.discourse.group/
+
+Overview
+--------
+The RGB LED matrix panels can be scored at [Sparkfun][sparkfun],
+[AdaFruit][ada] or eBay and Aliexpress. If you are in China, I'd try to get
+them directly from some manufacturer, Taobao or Alibaba.
+
+The `RGBMatrix` class provided in `include/led-matrix.h` does what is needed
+to control these. You can use this as a library in your own projects or just
+use the demo binary provided here which provides some useful examples.
+
+Check out [utils/ directory for some ready-made tools](./utils) to get started
+using the library, or the [examples-api-use/](./examples-api-use) directory if
+you want to get started programming your own utils.
+
+All Raspberry Pi versions supported
+-----------------------------------
+
+This supports the old Raspberry Pi's Version 1 with 26 pin header and also the
+B+ models, the Pi Zero, Raspberry Pi 2 and 3 with 40 pins, as well as the
+Compute Modules which have 44 GPIOs.
+The 26 pin models can drive one chain of RGB panels, the 40 pin models
+**up to three** chains in parallel (each chain 12 or more panels long).
+The Compute Module can drive **up to 6 chains in parallel**.
+The Raspberry Pi 2 and 3 are faster and generally perferred to the older
+models (and the Pi Zero). With the faster models, the panels sometimes
+can't keep up with the speed; check out
+this [troubleshooting section](#troubleshooting) what to do.
+
+A lightweight, non-GUI, distribution such as [DietPi] is recommended.
+[Raspbian Lite][raspbian-lite] is a bit easier to get started with and
+is a good second choice.
+
+Types of Displays
+-----------------
+There are various types of displays that come all with the same Hub75 connector.
+They vary in the way the multiplexing is happening so this library supports
+options to choose that.
+All these are configured by flags (or, programmatically, in an [Options struct](include/led-matrix.h#L57)).
+
+If you have a 64x32 display, you need to supply the flags
+`--led-cols=64 --led-rows=32` for instance.
+
+Depending on the Matrix, there are various configuration options that
+you might need to set for it to work. See further below in the README for the
+[detailed description of these](#changing-parameters-via-command-line-flags).
+While the `--led-rows` and `--led-cols` can be derived from simply looking
+at the panels, the other options might require some experimenting to find the
+right setting if there is no description provided by the manufacturer of
+the panel. Going through these options for experiments would typically not do
+harm, so you're free to experiment to find your setting.
+
+Flag                                | Description
+:---------------      | :-----------------
+`--led-cols`          | Columns in the LED matrix, the 'width'.
+`--led-rows`          | Rows in the LED matrix, the 'height'.
+`--led-multiplexing`  | In particular bright outdoor panels with small multiplex ratios require this. Often an indicator: if there are fewer address lines than expected: ABC (instead of ABCD) for 32 high panels and ABCD (instead of ABCDE) for 64 high panels.
+`--led-row-addr-type` | Adressing of rows; in particular panels with only AB address lines might indicate that this is needed.
+`--led-panel-type`    | Chipset of the panel. In particular if it doesn't light up at all, you might need to play with this option because it indicates that the panel requires a particular initialization sequence.
+
+Panels can be chained by connecting the output of one panel to the input of
+the next panel. You can chain quite a few together, but the refresh rate will
+reduce with longer chains.
+
+The 64x64 matrixes typically come in two kinds: with 5 address
+lines (A, B, C, D, E), or (A, B); the latter needs a `--led-row-addr-type=1`
+parameter. So-called 'outdoor panels' are typically brighter and allow for
+faster refresh-rate for the same size, but do some multiplexing internally
+of which there are a few types out there; they can be chosen with
+the `--led-multiplexing` parameter.
+
+There are some panels that have a different chip-set than the default HUB75.
+These require some initialization sequence. The current supported types are
+`--led-panel-type=FM6126A` and `--led-panel-type=FM6127`.
+
+Generally, the higher scan-rate (e.g. 1:8), a.k.a. outdoor panels generally
+allow faster refresh rate, but you might need to figure out the multiplexing
+mapping if one of the three provided does not work.
+
+Some 32x16 outdoor matrixes with 1:4 scan (e.g. [Qiangli Q10(1/4) or X10(1/4)](http://qiangliled.com/products-63.html))
+have 4 address line (A, B, C, D). For such matrices is necessary to
+use `--led-row-addr-type=2` parameter. Also the matrix Qiangli Q10(1/4)
+have "Z"-stripe pixel mapping and in this case, you'd use two parameters
+at the same time `--led-row-addr-type=2 --led-multiplexing=4`.
+
+Let's do it
+------------
+This documentation is split into parts that help you through the process
+
+  1. <a href="wiring.md"><img src="img/wire-up-icon.png"></a>
+    [**Wire up the matrix to your Pi**](./wiring.md). This document describes
+    what goes where. You might also be interested
+    in [breakout boards](./adapter) for that.
+    If you have an [Adafruit HAT] or [Adafruit Bonnet], you can choose that with
+    a command line option [described below](#if-you-have-an-adafruit-hat-or-bonnet)
+  2. Run a demo. You find that in the
+     [examples-api-use/](./examples-api-use#running-some-demos) directory:
+```
+make -C examples-api-use
+sudo examples-api-use/demo -D0
+```
+  3. Use the utilities. The [utils](./utils) directory has some ready-made
+    useful utilities to show content. [Go there](./utils) to see how to
+    compile and run these.
+  4. Write your own programs using the Matrix in C++ or one of the
+     bindings such as Python or C#.
+
+### Utilities
+
+The [utils directory](./utils) is meant for ready utilities to show images or
+animated gifs or videos. Read the [README](./utils/README.md) there for
+instructions how to compile.
+
+There are external projects that use this library and provide higher level
+network protocols, such as the
+ * [FlaschenTaschen implementation](https://github.com/hzeller/flaschen-taschen)
+   (VLC can send videos to it natively)
+ * [PixelPusher implementation](https://github.com/hzeller/rpi-matrix-pixelpusher) (common in light art installations)
+ * [ZeroMQ-server](https://github.com/Knifa/led-matrix-zmq-server) to receive
+   content.
+ * Marc's [FastLED_RPIRGBPanel_GFX](http://marc.merlins.org/perso/arduino/post_2020-01-01_Running-FastLED_-Adafruit_GFX_-and-LEDMatrix-code-on-High-Resolution-RGBPanels-with-a-Raspberry-Pi.html) allows running arduino code on linux/rPi and display on bigger RGBPanel matrices than arduino chips, can.
+
+### API
+
+The library comes as an API that you can use for your own utilities and use-cases.
+
+  * The native library is a C++ library (see [include/](./include)).
+    Example uses you find in the [examples-api-use/](./examples-api-use)
+    directory.
+  * If you prefer to program in C, there is also a
+    [C API](./include/led-matrix-c.h).
+  * In the [python](./bindings/python) subdirectory, you find a Python API including a
+    couple of [examples](./bindings/python/samples) to get started.
+  * There are a couple of external bindings, such as
+      * [Nodejs binding] by Maxime Journaux
+      * [Nodejs/Typescript binding] by Alex Eden
+      * [Go binding] by Máximo Cuadros
+      * [Rust binding] by Vincent Pasquier
+
+### Changing parameters via command-line flags
+
+For the programs in this distribution and also automatically in your own
+programs using this library, there are a lot of parameters provided as command
+line flags, so that you don't have to re-compile your programs to tweak them.
+Some might need to be changed for your particular kind of panel.
+
+Here is a little run-down of what these command-line flags do and when you'd
+like to change them.
+
+First things first: if you have a different wiring than described in
+[wiring](./wiring.md), for instance if you have an Adafruit HAT/Bonnet, you can
+choose these here:
+
+```
+--led-gpio-mapping=<gpio-mapping>: Name of GPIO mapping used. Default "regular"
+```
+
+This can have values such as
+  - `--led-gpio-mapping=regular` The standard mapping of this library, described in the [wiring](./wiring.md) page.
+  - `--led-gpio-mapping=adafruit-hat` The Adafruit HAT/Bonnet, that uses this library or
+  - `--led-gpio-mapping=adafruit-hat-pwm` Adafruit HAT with the anti-flicker hardware mod [described below](#improving-flicker).
+  - `--led-gpio-mapping=compute-module` Additional 3 parallel chains can be used with the Compute Module.
+
+Learn more about the mappings in the [wiring documentation](wiring.md#alternative-hardware-mappings).
+
+#### GPIO speed
+
+```
+--led-slowdown-gpio=<0..4>: Slowdown GPIO. Needed for faster Pis and/or slower panels (Default: 1).
+```
+
+The Raspberry Pi starting with Pi2 are putting out data too fast for almost
+all LED panels I have seen. In this case, you want to slow down writing to
+GPIO. Zero for this parameter means 'no slowdown'.
+
+The default 1 (one) typically works fine, but often you have to even go further
+by setting it to 2 (two). If you have a Raspberry Pi with a slower processor
+(Model A, A+, B+, Zero), then a value of 0 (zero) might work and is desirable.
+
+A Raspberry Pi 3 or Pi4 might even need higher values for the panels to be
+happy.
+
+#### Panel Connection
+The next most important flags describe the type and number of displays connected
+
+```
+--led-rows=<rows>        : Panel rows. Typically 8, 16, 32 or 64. (Default: 32).
+--led-cols=<cols>        : Panel columns. Typically 32 or 64. (Default: 32).
+--led-chain=<chained>    : Number of daisy-chained panels. (Default: 1).
+--led-parallel=<parallel>: For A/B+ models or RPi2,3b: parallel chains. range=1..3 (Default: 1, 6 for Compute Module).
+```
+
+These are the most important ones: here you choose how many panels you have
+connected and how many rows are in each panel. Panels can be chained (each panel
+has an input and output connector, see the
+[wiring documentation](wiring.md#chains)) -- the `--led-chain` flag tells the
+library how many panels are chained together. The newer Raspberry Pi's allow
+to connect multiple chains in parallel, the `--led-parallel` flag tells it how
+many there are.
+
+This illustrates what each of these parameters mean:
+
+<a href="wiring.md#chaining-parallel-chains-and-coordinate-system"><img src="img/coordinates.png"></a>
+
+##### Panel Type
+
+Typically, panels should just work out of the box, but some panels use a
+different chip-set that requires some initialization. If you don't see any
+output on your panel, try setting:
+
+```
+--led-panel-type=FM6126A
+```
+
+Some panels have the FM6127 chip, which is also an option.
+
+##### Multiplexing
+If you have some 'outdoor' panels or panels with different multiplexing,
+the following will be useful:
+
+```
+--led-multiplexing=<0..17> : Mux type: 0=direct; 1=Stripe; 2=Checkered...
+```
+
+The outdoor panels have different multiplexing which allows them to be faster
+and brighter, but by default their output looks jumbled up.
+They require some pixel-mapping of which there are a few
+types you can try and hopefully one of them works for your panel; The default=0
+is no mapping ('standard' panels), while 1, 2, ... are different mappings
+to try with. If your panel has a different mapping, you find everything you
+need to implement one in [lib/multiplex-mappers.cc](lib/multiplex-mappers.cc).
+Please send a pull request if you encounter a panel for which you needed to
+implement a new mapping.
+
+Note that you have to set the `--led-rows` and `--led-cols` to the rows and
+columns that are physically on each chained panel so that the multiplexing
+option can work properly. For instance a `32x16` panel with `1:4` multiplexing
+would be controlled with `--led-rows=16 --led-cols=32 --led-multiplexing=1` (or
+whatever multiplexing type your panel is, so it can also be `--led-multiplexing=2` ...).
+
+For `64x32` panels with `1:8` multiplexing, this would typically be
+`--led-rows=32 --led-cols=64 --led-multiplexing=1`;
+however, there are some panels that internally behave like
+two chained panels, so then you'd use
+`--led-rows=32 --led-cols=32 --led-chain=2 --led-multiplexing=1`;
+
+```
+--led-row-addr-type=<0..4>: 0 = default; 1 = AB-addressed panels; 2 = direct row select; 3 = ABC-addressed panels; 4 = ABC Shift + DE direct (Default: 0).
+```
+
+This option is useful for certain 64x64 or 32x16 panels. For 64x64 panels,
+that only have an `A` and `B` address line, you'd use `--led-row-addr-type=1`.
+This is only tested with one panel so far, so if it doesn't work for you,
+please send a pull request.
+
+For 32x16 outdoor panels, that have have 4 address line (A, B, C, D), it is
+necessary to use `--led-row-addr-type=2`.
+
+#### Panel Arrangement
+
+```
+--led-pixel-mapper  : Semicolon-separated list of pixel-mappers to arrange pixels.
+```
+
+Optional params after a colon e.g. "U-mapper;Rotate:90"
+
+Available | Parameter after colon| Example
+----------|----------------------|----------
+Mirror    | `H` or `V` for horizontal/vertical mirror. | `Mirror:H`
+Rotate    | Degrees.                                   | `Rotate:90`
+U-mapper  | -
+
+Mapping the logical layout of your boards to your physical arrangement. See
+more in [Remapping coordinates](./examples-api-use#remapping-coordinates).
+
+#### Misc Options
+
+```
+--led-brightness=<percent>: Brightness in percent (Default: 100).
+```
+
+Self explanatory.
+
+
+```
+--led-pwm-bits=<1..11>    : PWM bits (Default: 11).
+```
+
+The LEDs can only be switched on or off, so the shaded brightness perception
+is achieved via PWM (Pulse Width Modulation). In order to get a good 8 Bit
+per color resolution (24Bit RGB), the 11 bits default per color are good
+(why ? Because our eyes are actually perceiving brightness logarithmically, so
+we need a lot more physical resolution to get 24Bit sRGB).
+
+With this flag, you can change how many bits it should use for this; lowering it
+means the lower bits (=more subtle color nuances) are omitted.
+Typically you might be mostly interested in the extremes: 1 Bit for situations
+that only require 8 colors (e.g. for high contrast text displays) or 11 Bit
+for everything else (e.g. showing images or videos). Why would you bother at all ?
+Lower number of bits use slightly less CPU and result in a higher refresh rate.
+
+```
+--led-show-refresh        : Show refresh rate.
+```
+
+This shows the current refresh rate of the LED panel, the time to refresh
+a full picture. Typically, you want this number to be pretty high, because the
+human eye is pretty sensitive to flicker. Depending on the settings, the
+refresh rate with this library are typically in the hundreds of Hertz but
+can drop low with very long chains. Humans have different levels of perceiving
+flicker - some are fine with 100Hz refresh, others need 250Hz.
+So if you are curious, this gives you the number (shown on the terminal).
+
+The refresh rate depends on a lot of factors, from `--led-rows` and `--led-chain`
+to `--led-pwm-bits`, `--led-pwm-lsb-nanoseconds` and `--led-pwm-dither-bits`.
+If you are tweaking these parameters, showing the refresh rate can be a
+useful tool.
+
+```
+--led-limit-refresh=<Hz>  : Limit refresh rate to this frequency in Hz. Useful to keep a
+                            constant refresh rate on loaded system. 0=no limit. Default: 0
+```
+
+This allows to limit the refresh rate to a particular frequency to approach
+a fixed refresh rate.
+
+This can be used to mitigate some situations in which you have a faint flicker,
+which can happen due to hardware events (network access)
+or other situations such as other IO or heavy memory access by other
+processes. Also when you see wildly changing refresh frequencies with
+`--led-show-refresh`.
+
+You trade a slightly slower refresh rate and display brightness for less
+visible flicker situations.
+
+For this to calibrate, run your program for a while with --led-show-refresh
+and watch the line that shows the current refresh rate and minimum refresh
+rate observed. So wait a while until that value doesn't
+change anymore (e.g. a minute, so that you catch tasks that happen once
+a minute, such as ntp updated).
+Use this as a guidance what value to choose with `--led-limit-refresh`.
+
+The refresh rate will now be adapted to always reach this value
+between frames, so faster refreshes will be slowed down, but the occasional
+delayed frame will fit into the time-window as well, thus reducing visible
+brightness fluctuations.
+
+You can play with value a little and reduce until you find a good balance
+between refresh rate and flicker suppression.
+
+Use this also if you want to have a stable baseline refresh rate when using
+the vsync-multiple flag `-V` in the [led-image-viewer] or
+[video-viewer] utility programs.
+
+```
+--led-scan-mode=<0..1>    : 0 = progressive; 1 = interlaced (Default: 0).
+```
+
+This switches from progressive scan and interlaced scan. The latter might
+look be a little nicer when you have a very low refresh rate, but typically
+it is more annoying because of the comb-effect (remember 80ies TV ?).
+
+
+```
+--led-pwm-lsb-nanoseconds : PWM Nanoseconds for LSB (Default: 130)
+```
+
+This allows to change the base time-unit for the on-time in the lowest
+significant bit in nanoseconds.
+Lower values will allow higher frame-rate, but will also negatively impact
+qualty in some panels (less accurate color or more ghosting).
+
+Good values for full-color display (PWM=11) are somewhere between 100 and 300.
+
+If you you use reduced bit color (e.g. PWM=1) and have sharp contrast
+applications, then higher values might be good to minimize ghosting.
+
+How to decide ? Just leave the default if things are fine. But some panels have
+trouble with sharp contrasts and short pulses that results
+in ghosting. It is particularly apparent in situations such as bright text
+on black background. In these cases increase the value until you don't see
+this ghosting anymore.
+
+The following example shows how this might look like:
+
+Ghosting with low --led-pwm-lsb-nanoseconds  | No ghosting after tweaking
+---------------------------------------------|------------------------------
+![](img/text-ghosting.jpg)                   |![](img/text-no-ghosting.jpg)
+
+If you tweak this value, watch the framerate (`--led-show-refresh`) while playing
+with this number.
+
+```
+--led-pwm-dither-bits   : Time dithering of lower bits (Default: 0)
+```
+
+The lower bits can be time dithered, i.e. their brightness contribution is
+achieved by only showing them some frames (this is possible,
+because the PWM is implemented as binary code modulation).
+This will allow higher refresh rate (or same refresh rate with increased
+`--led-pwm-lsb-nanoseconds`).
+The disadvantage could be slightly lower brightness, in particular for longer
+chains, and higher CPU use.
+CPU use is not of concern for Rasbperry Pi 2 or 3 (as we run on a dedicated
+core anyway) but proably for Raspberry Pi 1 or Pi Zero.
+Default: no dithering; if you have a Pi 3 and struggle with low frame-rate due
+to high multiplexing panels (1:16 or 1:32) or long chains, it might be
+worthwhile to try.
+
+```
+--led-no-hardware-pulse   : Don't use hardware pin-pulse generation.
+```
+
+This library uses a hardware subsystem that also is used by the sound. You can't
+use them together. If your panel does not work, this might be a good start
+to debug if it has something to do with the sound subsystem (see Troubleshooting
+section). This is really only recommended for debugging; typically you actually
+want the hardware pulses as it results in a much more stable picture.
+
+<a name="no-drop-priv"/>
+
+```
+--led-no-drop-privs       : Don't drop privileges from 'root' after initializing the hardware.
+```
+
+You need to start programs as root as it needs to access some low-level hardware
+at initialization time. After that, it is typically not desirable to stay in this
+role, so the library then drops the privileges.
+
+This flag allows to switch off this behavior, so that you stay root.
+Not recommended unless you have a specific reason for it (e.g. you need root
+to access other hardware or you do the privilege dropping yourself).
+
+```
+--led-daemon              : Make the process run in the background as daemon.
+```
+
+If this is set, the program puts itself into the background (running
+as 'daemon').
+You might want this if started from an init script at boot-time.
+
+```
+--led-inverse             : Switch if your matrix has inverse colors on.
+--led-rgb-sequence        : Switch if your matrix has led colors swapped (Default: "RGB")
+```
+
+These are if you have a different kind of LED panel in which the logic of the
+color bits is reversed (`--led-inverse`) or where the Red, Green and Blue LEDs
+are mixed up (`--led-rgb-sequence`). You know it when you see it.
+
+Troubleshooting
+---------------
+Here are some tips in case things don't work as expected.
+
+### Use minimal Raspbian distribution
+In general, run a minimal configuration on your Pi.
+
+  * Do not use a graphical user interface (Even though the
+    Raspberry Pi foundation makes you believe that you can do that: don't.
+    Using a Pi with a GUI is a frustratingly slow use of an otherwise
+    perfectly good embedded device.).
+    Always operate your Raspberry Pi [headless].
+
+  * Switch off on-board sound (`dtparam=audio=off` in `/boot/config.txt`).
+    External USB sound adapters work, and are much better quality anyway,
+    so that is recommended if you happen to need sound. The on-board sound
+    uses a timing circuit that the RGB-Matrix needs (it seems in some
+    distributions, such as arch-linux, this is not enough and you need
+    to explicitly blacklist the snd_bcm2835 module).
+
+  * Don't run anything that messes in parallel with the GPIO pins, e.g.
+    PiGPIO library/daemon or devices that use the i2c or 1-wire interface if
+    they are on the same pins you need for the panel.
+
+  * I have also seen reports that on some Pis, the one-wire protocol is
+    enabled (w1-gpio). This will also not work (disable by removing
+    `dtoverlay=w1-gpio` in `/boot/config.txt`; or using `raspi-config`,
+    Interface Options -> 1-Wire)
+
+  * If you see some regular flickering, make sure that there is no other
+    process running on the system that could cause that. For instance, it is
+    known that merely running `top` creates a faint flicker every second it
+    updates. Or a regular ntp run can also cause flicker once a minute
+    (switch off with `sudo timedatectl set-ntp false`). Maybe instead you
+    might want to run ntp at system start-up but then not regularly updating.
+    There might be other things running regularly you don't need;
+    consider a `sudo systemctl stop cron` for instance.
+    To address some irregular flicker, consider the
+    [`--led-limit-refresh`](#misc-options) option.
+
+  * There are probably other processes that are running that you don't need
+    and remove them; I usually remove right away stuff I really don't need e.g.
+    ```
+    sudo apt-get remove bluez bluez-firmware pi-bluetooth triggerhappy pigpio
+    ```
+    Take a close look at your systemd (`systemctl`) and see if there are other
+    things running you don't need. If you have seen packages in standard
+    Raspbians that interfere with the matrix code, let me know to include it
+    here.
+    In general: This is why starting with a minimal installation is a good
+    idea: there is simply less cruft that you have to disable.
+
+  * It seems that more recent version of Raspbian Lite result in some faint
+    brightness fluctuations of the displays and it is not quite clear why (see
+    issue [#483](https://github.com/hzeller/rpi-rgb-led-matrix/issues/483)).
+    If you are a Kernel person and can help figuring out what is
+    happening that would be very appreciated. Also, you might know a minimal
+    Linux distribution that is more suited for near realtime applications ?
+
+The default install of **[Raspbian Lite][raspbian-lite]** or **[DietPi]**
+seem to be good starting points, as they have a reasonably minimal
+configuration to begin with. Raspbian Lite is not as lite anymore
+as it used to be; I prefer DietPi these days.
+
+### Bad interaction with Sound
+If sound is enabled on your Pi, this will not work together with the LED matrix,
+as both need the same internal hardware sub-system (a first test to see if you
+are affected is to run the progrem with `--led-no-hardware-pulse` and see if
+things work fine then).
+
+If you run `lsmod` and see the `snd_bcm2835` module, this could be causing trouble.
+(The library actually exits if it finds this module to be loaded).
+
+In that case, you should create a kernel module blacklist file like the
+following on your system and update your initramfs:
+
+```
+cat <<EOF | sudo tee /etc/modprobe.d/blacklist-rgb-matrix.conf
+blacklist snd_bcm2835
+EOF
+
+sudo update-initramfs -u
+```
+
+Reboot and confirm that the module is not loaded.
+
+### I have followed some tutorial on the Internet and it doesn't work
+
+Well, if you use this library, please read the documentation provided _here_,
+not on some other website. Most important for you to get started
+is the [wiring guide](./wiring.md). There are some tutorials floating around
+that refer to a very old version of this library.
+
+### I have a Pi1 Revision1 and top part of Panel doesn't show green
+
+Use `--led-gpio-mapping=regular-pi1`
+
+### Logic level voltage not sufficient
+Some panels don't interpret the 3.3V logic level well, or the RPi output drivers
+have trouble driving longer cables, in particular with
+faster Raspberry Pis Version 2. This results in artifacts like randomly
+showing up pixels, color fringes, or parts of the panel showing 'static'.
+
+If you encounter this, try these things
+
+   - Make sure to have as short as possible flat-cables connecting your
+     Raspberry Pi with the LED panel.
+
+   - In particular if the chips close to the input of the LED panel
+     read 74HC245 instead of 74HCT245 or 74AHCT245, then this board will not
+     work properly with 3.3V inputs coming from the Pi.
+     Use an [adapter board](./adapter/active-3) with a bus-driver that acts as
+     level shifter between 3.3V and 5V.
+     (In any case, it is always a good idea to use the level shifters).
+
+   - A temporary hack to make HC245 inputs work with the 3.3V levels is to
+     supply only like 4V to the LED panel. But the colors will be off, so not
+     really useable as long-term solution.
+
+   - If you can't implement the above things, or still have problems, you can
+     slow down the GPIO writing a bit. This will of course reduce the
+     frame-rate, so it comes at a cost.
+
+For GPIO slow-down, add the flag `--led-slowdown-gpio=2` to the invocation of
+the binary.
+
+If you have an Adafruit HAT or Bonnet
+---------------------------
+
+Generally, if you want to connect RGB panels via an adapter instead of
+hand-wiring, I suggest to build one of the adapters whose open-hardware
+files you find in the [adapter/](./adapter) subdirectory. It is a fun solder
+exercise with large surface mount components.
+
+However, Adafruit [offers an adapter][adafruit-hat] which is already ready-made,
+but it only allows for a single chain. If the
+ready-made vs. single-chain tradeoff is worthwhile, then you might go for that
+(I am not affiliated with Adafruit).
+
+### Switch the Pinout
+
+The Adafruit HAT/Bonnet uses this library but a modified pinout to support other
+features on the HAT. You can choose the Adafruit pinout with a command line
+flag.
+
+Just pass the option `--led-gpio-mapping=adafruit-hat`. This works on the C++
+and Python examples.
+
+### Improving flicker
+
+To improve flicker, we need to do a little hardware modification,
+but it is very simple: solder a wire between GPIO 4 and 18 as shown in the
+following picture (click to enlarge):
+
+<a href="img/adafruit-mod.jpg"><img src="img/adafruit-mod.jpg" height="80px"></a>
+
+Then, start your programs with `--led-gpio-mapping=adafruit-hat-pwm`.
+
+Now you should have less visible flicker. This essentially
+switches on the hardware pulses feature for the Adafruit HAT/Bonnet.
+
+### 64x64 with E-line on Adafruit HAT/Bonnet
+There are LED panels that have 64x64 LEDs packed, but they need 5 address lines,
+which is 1:32 multiplexing (they have an `E` address-line). The first generation
+of the Adafruit HAT/Bonnet was not prepared for this, but it can be done with another
+hardware mod. Beginning October 2018, Adafruit began selling an updated version of
+the HAT that supports 64x64 panels simply by bridging two pads on the PCB with solder.
+
+You can identify which HAT you have by looking for the **Address E** pads, circled here:
+
+<a href="https://cdn-learn.adafruit.com/assets/assets/000/063/005/original/led_matrices_addr-e-pad.jpg" target="_blank"><img src="https://cdn-learn.adafruit.com/assets/assets/000/063/005/original/led_matrices_addr-e-pad.jpg" height=80></a>
+
+### New Adafruit RGB Matrix Hat (with Address E pads)
+
+Look for the Address E pads located between the HUB75 connector and Pi camera cutout.
+
+Melt a blob of solder between the center “E” pad the the “8” pad just above it
+(for 64x64 matrices in the Adafruit shop)…*_or_* the “16” pad below (rare, for some
+third-party 64x64 matrices…check datasheet).
+
+### Old Adafruit HAT/Bonnet (without)
+
+It is a little more advanced hack, so it is only really for people who are
+comfortable with this kind of thing.
+First, you have to figure out which is the input of the E-Line on your matrix
+(they seem to be either on Pin 4 or Pin 8 of the IDC connector).
+You need to disconnect that Pin from the ground plane (e.g. with an Exacto
+knife) and connect GPIO 24 to it. The following images illustrate the case for
+IDC Pin 4.
+
+<a href="img/adafruit-64x64-front.jpg"><img src="img/adafruit-64x64-front.jpg" height="80px"></a>
+<a href="img/adafruit-64x64-back.jpg"><img src="img/adafruit-64x64-back.jpg" height="80px"></a>
+
+If the direct connection does not work, you need to send it through a free
+level converter of the Adafruit HAT/Bonnet. Since all unused inputs are grounded
+with traces under the chip, this involves lifting a leg from the
+HCT245 (figure out a free bus driver from the schematic). If all of the
+above makes sense to you, you have the Ninja level to do it!
+
+It might be more convienent at this point to consider the [Active3 adapter](./adapter/active-3)
+that has that covered already.
+
+Running as root
+---------------
+The library requires to access hardware registers to control the LED matrix,
+and create accurate timings. These hardware accesses require to run as root
+user.
+
+For security reasons, it is usually not a good idea to run an application
+as root entirely, so this library makes sure to drop privileges immediately
+after the hardware is initialized.
+
+You can switch off the privilege dropping with the
+[`--led-no-drop-privs`](#user-content-no-drop-priv) flag, or, if you do this
+programmatically,
+choose the configuration in the
+[`RuntimeOptions struct`](https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/include/led-matrix.h#L401).
+
+Note, you _could_ run as non-root, which will use `/dev/gpiomem`
+to at least write to GPIO, however the precise timing hardware registers are
+not accessible. This will result in flicker and color degradation. Starting
+as non-root is not recommended.
+
+CPU use
+-------
+
+These displays need to be updated constantly to show an image with PWMed
+LEDs. This is dependent on the length of the chain: for each chain element,
+about 1'000'000 write operations have to happen every second!
+(chain_length * 32 pixel long * 16 rows * 11 bit planes * 180 Hz refresh rate).
+
+We can't use hardware support for writing these as DMA is too slow,
+thus the constant CPU use on an RPi is roughly 30-40% of one core.
+Keep that in mind if you plan to run other things on this computer (This
+is less noticable on Raspberry Pi, Version 2 or 3 that has more cores).
+
+Also, the output quality is susceptible to other heavy tasks running on that
+computer - there might be changes in the overall brigthness when this affects
+the referesh rate.
+
+If you have a loaded system and one of the newer Pis with 4 cores, you can
+reserve one core just for the refresh of the display:
+
+```
+isolcpus=3
+```
+
+.. at the end of the line of `/boot/cmdline.txt` (needs to be in the same as
+the other arguments, no newline). This will use the last core
+only to refresh the display then, but it also means, that no other process can
+utilize it then. Still, I'd typically recommend it.
+
+Performance improvements and limits
+-----------------------------------
+Regardless of which driving hardware you use, ultimately you can only push pixels
+so fast to a string of panels before you get flickering due to too low a refresh
+rate (less than 80-100Hz), or before you refresh the panel lines too fast and they
+appear too dim because each line is not displayed long enough before it is turned off.
+
+Basic performance tips:
+- Use --led-show-refresh to see the refresh rate while you try parameters
+- use an active-3 board with led-parallel=3
+- led-pwm-dither-bits=1 gives you a speed boost but less brightness
+- led-pwm-lsb-nanoseconds=50 also gives you a speed boost but less brightness
+- led-pwm-bits=7 or even lower decrease color depth but increases refresh speed
+- AB panels and other panels with that use values of led-multiplexing bigger than 0,
+will also go faster, although as you tune more options given above, their advantage will decrease.
+- 32x16 ABC panels are faster than ABCD which are faster than ABCDE, which are faster than 128x64 ABC panels
+(which do use 5 address lines, but over only 3 wires)
+- Use at least an rPi3 (rPi4 is still slightly faster but may need --led-slowdown-gpio=2)
+
+Maximum resolutions reasonably achievable:
+A general rule of thumb is that running 16K pixels (128x128 or otherwise) on a single chain,
+is already pushing limits and you will have to make tradeoffs in visual quality. 32K pixels
+(like 128x256) is definitely pushing things and you'll get 100Hz or less depending on the
+performance options you choose.
+This puts the maximum reasonable resolution around 100K pixels (like 384x256) for 3 chains.
+You can see more examples and video capture of speed on [Marc MERLIN's page 'RGB Panels, from 192x80, to 384x192, to 384x256 and maybe not much beyond'](http://marc.merlins.org/perso/arduino/post_2020-03-13_RGB-Panels_-from-192x80_-to-384x192_-to-384x256-and-maybe-not-much-beyond.html)
+If your refresh rate is below 300Hz, expect likely black bars when taking cell phone pictures.
+A real camera with shutter speed lowered accordingly, will get around this.
+
+Ultimately, you should not expect to go past 64K pixels using 3 chains without significant
+quality tradeoffs. If you need bigger displays, you should use multiple boards and synchronize the
+output.
+
+Limitations
+-----------
+If you are using the Adafruit HAT/Bonnet in the default configuration, then we
+can't make use of the PWM hardware (which only outputs
+to a particular pin), so you'll see random brightness glitches. I strongly
+suggest to do the aforementioned hardware mod.
+
+The system needs constant CPU to update the display. Using the DMA controller
+was considered but after extensive experiments
+( https://github.com/hzeller/rpi-gpio-dma-demo )
+dropped due to its slow speed..
+
+There is an upper limit in how fast the GPIO pins can be controlled, which
+limits the frame-rate. Raspberry Pi 2's and newer are generally faster.
+
+Even with everything in place, you might see faint brightness fluctuations
+in particular if there is something going on on the network or in a terminal
+on the Pi; this could probably be mitigated with some more real-time
+kernel for the Pi; maybe there are also hardware limitations (memory bus
+contention?). Anyway, if you have a realtime kernel configuration that you
+have optimized for this application, let me know.
+
+To address the brightness fluctuations, you might experiment with the
+`FIXED_FRAME_MICROSECONDS` compile time option in [lib/Makefile](lib/Makefile)
+that has instructions how to set it up.
+
+Fun
+---
+I am always happy to see users successfully using the software for wonderful
+things, like this installation by Dirk in Scharbeutz, Germany:
+
+![](./img/user-action-shot.jpg)
+
+[led-image-viewer]: ./utils#image-viewer
+[video-viewer]: ./utils#video-viewer
+[matrix64]: ./img/chained-64x64.jpg
+[sparkfun]: https://www.sparkfun.com/products/12584
+[ada]: http://www.adafruit.com/product/1484
+[rt-paper]: https://www.osadl.org/fileadmin/dam/rtlws/12/Brown.pdf
+[adafruit-hat]: https://www.adafruit.com/products/2345
+[raspbian-lite]: https://downloads.raspberrypi.org/raspbian_lite_latest
+[DietPi]: https://dietpi.com/
+[Adafruit HAT]: https://www.adafruit.com/products/2345
+[Adafruit Bonnet]: https://www.adafruit.com/product/3211
+[Nodejs binding]: https://github.com/zeitungen/node-rpi-rgb-led-matrix
+[Go binding]: https://github.com/mcuadros/go-rpi-rgb-led-matrix
+[Rust binding]: https://crates.io/crates/rpi-led-matrix
+[Nodejs/Typescript binding]: https://github.com/alexeden/rpi-led-matrix
+[headless]: https://www.raspberrypi.com/documentation/computers/configuration.html#setting-up-a-headless-raspberry-pi

depends/rpi-rgb-led-matrix/adapter/README.md

@@ -0,0 +1,23 @@
+PCB adapter for Raspberry Pi to Hub75 RGB Matrixes
+==================================================
+
+Since hand-wiring can be a little tedious, here are some PCBs that help
+with the wiring when using the `rpi-rgb-led-matrix` code.
+
+   * [Passive-3](./passive-3) Supports three parallel chains, directly connected
+     to the output of a Rapsberry Pi with 40 GPIO pins. Works, but usually it is better to
+     buffer the outputs using the ...
+   * [Active-3](./active-3) board. Supports three parallel chains with active buffering
+     and 3.3V -> 5V level shifting for best reliability. Requires SMD soldering.
+     
+     As another option you can buy it from these locations not affiliated with this project.
+     They are given to help you locate premade boards but no guarantees are given or implied:
+     * https://www.electrodragon.com/product/rgb-matrix-panel-drive-board-raspberry-pi/
+       ($3/board, but fairly long and/or expensive shipping from HKG)
+     * Seller #2 (fill me)
+   * The [Passive-RPi1](./passive-rpi1) adapter board is to connect one panel to
+     Raspberry Pi 1 with 26 GPIO pins.
+
+![Three Panels connected][three-panels]
+
+[three-panels]: ../img/three-parallel-panels-soic.jpg

depends/rpi-rgb-led-matrix/adapter/active-3/Makefile

@@ -0,0 +1,3 @@
+include ../kicad-scripts/makefile.inc
+
+active3-rpi-hub75-adapter-fab.zip:

depends/rpi-rgb-led-matrix/adapter/active-3/README.md

@@ -0,0 +1,84 @@
+Adapter PCB to support up to 3 panel chains
+===========================================
+
+   * Supports up to three panel chains for newer plus models and
+     Raspberry Pi 2 that have 40 GPIO pins.
+   * Uses HCT245 to level shift signals from 3.3V to 5V and shield
+     the Raspberry Pi GPIOs from overloading.
+   * Open source KiCAD PCB EDA format.
+   * Optional: Pads to power the Pi with 5V, including optional capacitor footprints.
+   * Connector for RxD input (literally the only GPIO pin left) in case you want to
+     make your panel controlled with a serial interface (3.3V logic level).
+   * Provides a way to choose the pinout for different kinds of 64x64 matrixes.
+   * (not very pretty layout, was just lazy and let the auto-router generate the first pass)
+   * BOM:
+     - 4x 74HCT245 or 74AHCT245 in 20-SOIC, 7.5mm package which should make
+     it easy to hand-solder. Make sure to get the variant with the **T**: HC**T** or AHC**T**
+     (there are also HC or AHC, don't use these).
+     - 4x 100nF ceramic capacitor (0805 package)
+     - 1x 10kOhm resistor (0805 package). Not critcial, just a pullup (2.2k .. 15k probably ok).
+     - 3x 16pin IDC (=2x8) male receptible to connect the panels.
+     - 1x 40pin female connector to connect to the RPi.
+     - 1x (optional) 22μF .. 100μF capacitor for 5V rail (either 1206 SMD or
+       radial electrolytic with 2.5mm pitch/6.3mm diameter)
+   * The Gerber FAB files are provided as [active3-rpi-hub75-adapter-fab.zip](./active3-rpi-hub75-adapter-fab.zip)
+
+The board is also [shared on OSH Park][osh-active3] (not affiliated).
+
+![Preview][rendering]
+![Real World][real-world]
+
+Essentially, this is connecting the output pins through level shifting buffers (they
+are operated at 5V, but the HCT series chips accept 3.3V input levels from the Pi). The
+strobe, OE and clock signals are separately buffered for each connector.
+
+![Schematic][schematic]
+
+## Optional
+
+### Power in
+
+The area on the left has 5V/GND input pads, that allow you to power your Raspberry Pi from
+a 5V source ... which you are likely to have as you are powering the LED Matrix. This is often
+more convenient than using the USB connector to power the Pi.
+
+If you do that, there are pads to add a capacitor to smooth the supply - two footprints are
+provided: C5 and C6 for through-hole or surface mount components. The value is not critical;
+I usually use a 22μF/6.3V ceramic capacitor on the C6 pads.
+
+### Choose E-Line for 64x64 panels with 1:32 multiplexing
+
+If you have a 64x64 matrix with 1:32 multiplexing, you need to supply an `E`-address line to it.
+While the Address lines `A` to `D` have fixed positions on the Hub75 connector, there
+seem to be two different ways to connect the `E` address line: it is either on pin 4 or pin 8
+of the connector. So this adapter board provides the flexibility to choose the right pin for
+your matrix.
+
+Look at the back of the matrix or the documentation to find out for your specific board where
+to connect E.
+
+Once you know that, the jumper area in the bottom left of this adapter board allows to choose
+to which pin to connect the E-address line to. The corresponding other pin should be connected
+to GND. Simply solder a wire bridge as indicated below (or use a jumper that you can change later).
+
+If you are not using such 64x64 matrix, you can connect both these pins to GND.
+
+Here are the typical configurations:
+
+No 1:32 64x64: to GND    | E-Line on Pin 4   | E-Line on Pin 8|
+-------------------------|-------------------|----------------
+![][config-default]      |![][config-pin4]   |![][config-pin8]
+
+### Input for serial RxD
+
+If you are not using a 64x64 display that occupies the E-Line, you can use the RxD serial input -
+this might come in handy if you are using the display to be controlled by a serial line. Be aware
+that the input requires 3.3V level, so if you have a RS232, make sure to first adapt the levels.
+
+[rendering]: ../../img/active3-pcb.png
+[config-default]: ../../img/active3-pcb-config-default.png
+[config-pin4]: ../../img/active3-pcb-config-pin4.png
+[config-pin8]: ../../img/active3-pcb-config-pin8.png
+[schematic]: ../../img/active3-schematic.png
+[real-world]: ../../img/three-parallel-panels-soic.jpg
+[osh-active3]: https://oshpark.com/shared_projects/6xAD1VXr

depends/rpi-rgb-led-matrix/adapter/active-3/active3-rpi-hub75-adapter-cache.lib

@@ -0,0 +1,352 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# 74xx_74HC245
+#
+DEF 74xx_74HC245 U 0 40 Y Y 1 L N
+F0 "U" -300 650 50 H V C CNN
+F1 "74xx_74HC245" -300 -650 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+ALIAS 74HC245
+$FPLIST
+ DIP?20*
+$ENDFPLIST
+DRAW
+S -300 600 300 -600 1 1 10 f
+P 3 1 0 0 -25 -50 -25 50 25 50 N
+P 4 1 0 0 -50 -50 25 -50 25 50 50 50 N
+X A->B 1 -500 -400 200 R 50 50 1 0 I
+X GND 10 0 -800 200 U 50 50 1 0 W
+X B7 11 500 -200 200 L 50 50 1 0 T
+X B6 12 500 -100 200 L 50 50 1 0 T
+X B5 13 500 0 200 L 50 50 1 0 T
+X B4 14 500 100 200 L 50 50 1 0 T
+X B3 15 500 200 200 L 50 50 1 0 T
+X B2 16 500 300 200 L 50 50 1 0 T
+X B1 17 500 400 200 L 50 50 1 0 T
+X B0 18 500 500 200 L 50 50 1 0 T
+X CE 19 -500 -500 200 R 50 50 1 0 I I
+X A0 2 -500 500 200 R 50 50 1 0 T
+X VCC 20 0 800 200 D 50 50 1 0 W
+X A1 3 -500 400 200 R 50 50 1 0 T
+X A2 4 -500 300 200 R 50 50 1 0 T
+X A3 5 -500 200 200 R 50 50 1 0 T
+X A4 6 -500 100 200 R 50 50 1 0 T
+X A5 7 -500 0 200 R 50 50 1 0 T
+X A6 8 -500 -100 200 R 50 50 1 0 T
+X A7 9 -500 -200 200 R 50 50 1 0 T
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_01x01
+#
+DEF Connector_Generic_Conn_01x01 J 0 40 Y N 1 F N
+F0 "J" 0 100 50 H V C CNN
+F1 "Connector_Generic_Conn_01x01" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*
+$ENDFPLIST
+DRAW
+S -50 5 0 -5 1 1 6 N
+S -50 50 50 -50 1 1 10 f
+X Pin_1 1 -200 0 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_01x02
+#
+DEF Connector_Generic_Conn_01x02 J 0 40 Y N 1 F N
+F0 "J" 0 100 50 H V C CNN
+F1 "Connector_Generic_Conn_01x02" 0 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 50 50 -150 1 1 10 f
+X Pin_1 1 -200 0 150 R 50 50 1 1 P
+X Pin_2 2 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_02x01
+#
+DEF Connector_Generic_Conn_02x01 J 0 40 Y N 1 F N
+F0 "J" 50 100 50 H V C CNN
+F1 "Connector_Generic_Conn_02x01" 50 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_2x??_*
+$ENDFPLIST
+DRAW
+S -50 5 0 -5 1 1 6 N
+S -50 50 150 -50 1 1 10 f
+S 150 5 100 -5 1 1 6 N
+X Pin_1 1 -200 0 150 R 50 50 1 1 P
+X Pin_2 2 300 0 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_02x08_Odd_Even
+#
+DEF Connector_Generic_Conn_02x08_Odd_Even J 0 40 Y N 1 F N
+F0 "J" 50 400 50 H V C CNN
+F1 "Connector_Generic_Conn_02x08_Odd_Even" 50 -500 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_2x??_*
+$ENDFPLIST
+DRAW
+S -50 -395 0 -405 1 1 6 N
+S -50 -295 0 -305 1 1 6 N
+S -50 -195 0 -205 1 1 6 N
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 205 0 195 1 1 6 N
+S -50 305 0 295 1 1 6 N
+S -50 350 150 -450 1 1 10 f
+S 150 -395 100 -405 1 1 6 N
+S 150 -295 100 -305 1 1 6 N
+S 150 -195 100 -205 1 1 6 N
+S 150 -95 100 -105 1 1 6 N
+S 150 5 100 -5 1 1 6 N
+S 150 105 100 95 1 1 6 N
+S 150 205 100 195 1 1 6 N
+S 150 305 100 295 1 1 6 N
+X Pin_1 1 -200 300 150 R 50 50 1 1 P
+X Pin_10 10 300 -100 150 L 50 50 1 1 P
+X Pin_11 11 -200 -200 150 R 50 50 1 1 P
+X Pin_12 12 300 -200 150 L 50 50 1 1 P
+X Pin_13 13 -200 -300 150 R 50 50 1 1 P
+X Pin_14 14 300 -300 150 L 50 50 1 1 P
+X Pin_15 15 -200 -400 150 R 50 50 1 1 P
+X Pin_16 16 300 -400 150 L 50 50 1 1 P
+X Pin_2 2 300 300 150 L 50 50 1 1 P
+X Pin_3 3 -200 200 150 R 50 50 1 1 P
+X Pin_4 4 300 200 150 L 50 50 1 1 P
+X Pin_5 5 -200 100 150 R 50 50 1 1 P
+X Pin_6 6 300 100 150 L 50 50 1 1 P
+X Pin_7 7 -200 0 150 R 50 50 1 1 P
+X Pin_8 8 300 0 150 L 50 50 1 1 P
+X Pin_9 9 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_02x20_Odd_Even
+#
+DEF Connector_Generic_Conn_02x20_Odd_Even J 0 40 Y N 1 F N
+F0 "J" 50 1000 50 H V C CNN
+F1 "Connector_Generic_Conn_02x20_Odd_Even" 50 -1100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_2x??_*
+$ENDFPLIST
+DRAW
+S -50 -995 0 -1005 1 1 6 N
+S -50 -895 0 -905 1 1 6 N
+S -50 -795 0 -805 1 1 6 N
+S -50 -695 0 -705 1 1 6 N
+S -50 -595 0 -605 1 1 6 N
+S -50 -495 0 -505 1 1 6 N
+S -50 -395 0 -405 1 1 6 N
+S -50 -295 0 -305 1 1 6 N
+S -50 -195 0 -205 1 1 6 N
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 205 0 195 1 1 6 N
+S -50 305 0 295 1 1 6 N
+S -50 405 0 395 1 1 6 N
+S -50 505 0 495 1 1 6 N
+S -50 605 0 595 1 1 6 N
+S -50 705 0 695 1 1 6 N
+S -50 805 0 795 1 1 6 N
+S -50 905 0 895 1 1 6 N
+S -50 950 150 -1050 1 1 10 f
+S 150 -995 100 -1005 1 1 6 N
+S 150 -895 100 -905 1 1 6 N
+S 150 -795 100 -805 1 1 6 N
+S 150 -695 100 -705 1 1 6 N
+S 150 -595 100 -605 1 1 6 N
+S 150 -495 100 -505 1 1 6 N
+S 150 -395 100 -405 1 1 6 N
+S 150 -295 100 -305 1 1 6 N
+S 150 -195 100 -205 1 1 6 N
+S 150 -95 100 -105 1 1 6 N
+S 150 5 100 -5 1 1 6 N
+S 150 105 100 95 1 1 6 N
+S 150 205 100 195 1 1 6 N
+S 150 305 100 295 1 1 6 N
+S 150 405 100 395 1 1 6 N
+S 150 505 100 495 1 1 6 N
+S 150 605 100 595 1 1 6 N
+S 150 705 100 695 1 1 6 N
+S 150 805 100 795 1 1 6 N
+S 150 905 100 895 1 1 6 N
+X Pin_1 1 -200 900 150 R 50 50 1 1 P
+X Pin_10 10 300 500 150 L 50 50 1 1 P
+X Pin_11 11 -200 400 150 R 50 50 1 1 P
+X Pin_12 12 300 400 150 L 50 50 1 1 P
+X Pin_13 13 -200 300 150 R 50 50 1 1 P
+X Pin_14 14 300 300 150 L 50 50 1 1 P
+X Pin_15 15 -200 200 150 R 50 50 1 1 P
+X Pin_16 16 300 200 150 L 50 50 1 1 P
+X Pin_17 17 -200 100 150 R 50 50 1 1 P
+X Pin_18 18 300 100 150 L 50 50 1 1 P
+X Pin_19 19 -200 0 150 R 50 50 1 1 P
+X Pin_2 2 300 900 150 L 50 50 1 1 P
+X Pin_20 20 300 0 150 L 50 50 1 1 P
+X Pin_21 21 -200 -100 150 R 50 50 1 1 P
+X Pin_22 22 300 -100 150 L 50 50 1 1 P
+X Pin_23 23 -200 -200 150 R 50 50 1 1 P
+X Pin_24 24 300 -200 150 L 50 50 1 1 P
+X Pin_25 25 -200 -300 150 R 50 50 1 1 P
+X Pin_26 26 300 -300 150 L 50 50 1 1 P
+X Pin_27 27 -200 -400 150 R 50 50 1 1 P
+X Pin_28 28 300 -400 150 L 50 50 1 1 P
+X Pin_29 29 -200 -500 150 R 50 50 1 1 P
+X Pin_3 3 -200 800 150 R 50 50 1 1 P
+X Pin_30 30 300 -500 150 L 50 50 1 1 P
+X Pin_31 31 -200 -600 150 R 50 50 1 1 P
+X Pin_32 32 300 -600 150 L 50 50 1 1 P
+X Pin_33 33 -200 -700 150 R 50 50 1 1 P
+X Pin_34 34 300 -700 150 L 50 50 1 1 P
+X Pin_35 35 -200 -800 150 R 50 50 1 1 P
+X Pin_36 36 300 -800 150 L 50 50 1 1 P
+X Pin_37 37 -200 -900 150 R 50 50 1 1 P
+X Pin_38 38 300 -900 150 L 50 50 1 1 P
+X Pin_39 39 -200 -1000 150 R 50 50 1 1 P
+X Pin_4 4 300 800 150 L 50 50 1 1 P
+X Pin_40 40 300 -1000 150 L 50 50 1 1 P
+X Pin_5 5 -200 700 150 R 50 50 1 1 P
+X Pin_6 6 300 700 150 L 50 50 1 1 P
+X Pin_7 7 -200 600 150 R 50 50 1 1 P
+X Pin_8 8 300 600 150 L 50 50 1 1 P
+X Pin_9 9 -200 500 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_CP_Small
+#
+DEF Device_CP_Small C 0 10 N N 1 F N
+F0 "C" 10 70 50 H V L CNN
+F1 "Device_CP_Small" 10 -80 50 H V L CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ CP_*
+$ENDFPLIST
+DRAW
+S -60 -12 60 -27 0 1 0 F
+S -60 27 60 12 0 1 0 N
+P 2 0 1 0 -50 60 -30 60 N
+P 2 0 1 0 -40 50 -40 70 N
+X ~ 1 0 100 73 D 50 50 1 1 P
+X ~ 2 0 -100 73 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C_Small
+#
+DEF Device_C_Small C 0 10 N N 1 F N
+F0 "C" 10 70 50 H V L CNN
+F1 "Device_C_Small" 10 -80 50 H V L CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 13 -60 -20 60 -20 N
+P 2 0 1 12 -60 20 60 20 N
+X ~ 1 0 100 80 D 50 50 1 1 P
+X ~ 2 0 -100 80 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power_GND
+#
+DEF power_GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power_GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# power_PWR_FLAG
+#
+DEF power_PWR_FLAG #FLG 0 0 N N 1 F P
+F0 "#FLG" 0 75 50 H I C CNN
+F1 "power_PWR_FLAG" 0 150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 50 -40 75 0 100 40 75 0 50 N
+X pwr 1 0 0 0 U 50 50 0 0 w
+ENDDRAW
+ENDDEF
+#
+# power_VCC
+#
+DEF power_VCC #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "power_VCC" 0 150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C 0 75 25 0 1 0 N
+P 2 0 1 0 0 0 0 50 N
+X VCC 1 0 0 0 U 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+#End Library

depends/rpi-rgb-led-matrix/adapter/active-3/active3-rpi-hub75-adapter.pro

@@ -0,0 +1,33 @@
+update=Sat 06 Jul 2019 08:45:23 PM PDT
+version=1
+last_client=kicad
+[cvpcb]
+version=1
+NetIExt=net
+[cvpcb/libraries]
+EquName1=devcms
+[general]
+version=1
+[pcbnew]
+version=1
+PageLayoutDescrFile=
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.6
+PadDrillOvalY=0.6
+PadSizeH=1.5
+PadSizeV=1.5
+PcbTextSizeV=1.5
+PcbTextSizeH=1.5
+PcbTextThickness=0.3
+ModuleTextSizeV=1
+ModuleTextSizeH=1
+ModuleTextSizeThickness=0.15
+SolderMaskClearance=0
+SolderMaskMinWidth=0
+DrawSegmentWidth=0.2
+BoardOutlineThickness=0.09999999999999999
+ModuleOutlineThickness=0.15
+[eeschema]
+version=1
+LibDir=

depends/rpi-rgb-led-matrix/adapter/kicad-scripts/kicad-fab.py

@@ -0,0 +1,83 @@
+'''
+    Based on gen_gerber_and_drill_files_board.py in kicad/demos directory.
+'''
+
+import sys
+
+from pcbnew import *
+filename=sys.argv[1]
+
+board = LoadBoard(filename)
+
+plotDir = "plot/"
+
+pctl = PLOT_CONTROLLER(board)
+
+popt = pctl.GetPlotOptions()
+
+popt.SetOutputDirectory(plotDir)
+
+# Set some important plot options:
+popt.SetPlotFrameRef(False)
+popt.SetLineWidth(FromMM(0.35))
+
+popt.SetAutoScale(False)
+popt.SetScale(1)
+popt.SetMirror(False)
+popt.SetUseGerberAttributes(False)
+popt.SetUseGerberProtelExtensions(True)
+popt.SetExcludeEdgeLayer(True);
+popt.SetScale(1)
+popt.SetUseAuxOrigin(True)
+
+# This by gerbers only (also the name is truly horrid!)
+popt.SetSubtractMaskFromSilk(False)
+
+# param 0 is the layer ID
+# param 1 is a string added to the file base name to identify the drawing
+# param 2 is a comment
+# Create filenames in a way that if they are sorted alphabetically, they
+# are shown in exactly the layering the board would look like. So
+#   gerbv *
+# just makes sense.
+plot_plan = [
+    ( Edge_Cuts, "0-Edge_Cuts",   "Edges" ),
+
+    ( F_Paste,   "1-PasteTop",    "Paste top" ),
+    ( F_SilkS,   "2-SilkTop",     "Silk top" ),
+    ( F_Mask,    "3-MaskTop",     "Mask top" ),
+    ( F_Cu,      "4-CuTop",       "Top layer" ),
+
+    ( B_Cu,      "5-CuBottom",    "Bottom layer" ),
+    ( B_Mask,    "6-MaskBottom",  "Mask bottom" ),
+    ( B_SilkS,   "7-SilkBottom",  "Silk top" ),
+    ( B_Paste,   "8-PasteBottom", "Paste Bottom" ),
+]
+
+
+for layer_info in plot_plan:
+    pctl.SetLayer(layer_info[0])
+    pctl.OpenPlotfile(layer_info[1], PLOT_FORMAT_GERBER, layer_info[2])
+    pctl.PlotLayer()
+
+# At the end you have to close the last plot, otherwise you don't know when
+# the object will be recycled!
+pctl.ClosePlot()
+
+# Fabricators need drill files.
+# sometimes a drill map file is asked (for verification purpose)
+drlwriter = EXCELLON_WRITER( board )
+drlwriter.SetMapFileFormat( PLOT_FORMAT_PDF )
+
+mirror = False
+minimalHeader = False
+offset = wxPoint(0,0)
+mergeNPTH = True
+drlwriter.SetOptions( mirror, minimalHeader, offset, mergeNPTH )
+
+metricFmt = True
+drlwriter.SetFormat( metricFmt )
+
+genDrl = True
+genMap = True
+drlwriter.CreateDrillandMapFilesSet( plotDir, genDrl, genMap );

depends/rpi-rgb-led-matrix/adapter/kicad-scripts/makefile.inc

@@ -0,0 +1,8 @@
+# -*- Makefile -*-
+
+%-fab.zip : %-fab.kicad_pcb
+	python ../kicad-scripts/kicad-fab.py $<
+	zip -r $@ plot/
+
+%-fab.kicad_pcb : %.kicad_pcb
+	sed "s/%%gitversion%%/`git log --date=short --pretty=format:'%h@%cd' -n 1`/" < $^ > $@

depends/rpi-rgb-led-matrix/adapter/passive-3/Makefile

@@ -0,0 +1,3 @@
+include ../kicad-scripts/makefile.inc
+
+passive3-rpi-hub75-adapter-fab.zip:

depends/rpi-rgb-led-matrix/adapter/passive-3/README.md

@@ -0,0 +1,26 @@
+Adapter PCB to support up to 3 panel chains
+===========================================
+
+   * This is a passive board. It is simple, but the logic level will be out of
+     spec for the LED matrix (3.3V vs. 5V) which might or might not work.
+     Driving long cables with the GPIO pins is also not a good idea.
+   * You typically want to consider using the [active board](../active-3).
+   * Works for Matrix up to 1:16 multiplexing (32 rows). For 1:32 multiplexing,
+     you want to use the [active board](../active-3). You can of also hack
+     this board as [suggested in this bugtracker entry](https://github.com/hzeller/rpi-rgb-led-matrix/issues/360#issuecomment-321104348) to make it work with
+     64x64 boards.
+   * Only really advisable, if the LED panels have 74HCT245 (as opposed to just
+     74HC245) in their input stage, because then they can deal properly with
+     the 3.3V logic levels coming from the Pi.
+   * Supports up to three panel chains for newer plus models and
+     Raspberry Pi 2/3 that have 40 GPIO pins.
+   * Open source KiCAD PCB EDA format.
+   * (not very pretty layout, was just lazy and let the auto-router do it).
+   * The FAB files are provided as [passive3-rpi-hub75-adapter-fab.zip](./passive3-rpi-hub75-adapter-fab.zip)
+
+This board is [shared on OSH Park][osh-passive3] (not affiliated).
+
+![Preview][rendering]
+
+[rendering]: ../../img/passive3-pcb.png
+[osh-passive3]: https://oshpark.com/shared_projects/FNAtZUsP

depends/rpi-rgb-led-matrix/adapter/passive-3/passive3-rpi-hub75-adapter-cache.lib

@@ -0,0 +1,218 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#
+<<<<<<< HEAD
+# CONN_01X01
+#
+DEF CONN_01X01 P 0 40 Y N 1 F N
+F0 "P" 0 100 50 H V C CNN
+F1 "CONN_01X01" 100 0 50 V V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+$FPLIST
+ Pin_Header_Straight_1X01
+ Pin_Header_Angled_1X01
+ Socket_Strip_Straight_1X01
+ Socket_Strip_Angled_1X01
+$ENDFPLIST
+DRAW
+S -50 5 10 -5 0 1 0 N
+S -50 50 50 -50 0 1 0 N
+X P1 1 -200 0 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+=======
+>>>>>>> d9ecea532afc911de3244f458589b6eadd051949
+# CONN_02X08
+#
+DEF CONN_02X08 P 0 1 Y N 1 F N
+F0 "P" 0 450 50 H V C CNN
+F1 "CONN_02X08" 0 0 50 V V C CNN
+F2 "" 0 -1200 60 H V C CNN
+F3 "" 0 -1200 60 H V C CNN
+$FPLIST
+ Pin_Header_Straight_2X08
+ Pin_Header_Angled_2X08
+ Socket_Strip_Straight_2X08
+ Socket_Strip_Angled_2X08
+$ENDFPLIST
+DRAW
+S -100 -345 -50 -355 0 1 0 N
+S -100 -245 -50 -255 0 1 0 N
+S -100 -145 -50 -155 0 1 0 N
+S -100 -45 -50 -55 0 1 0 N
+S -100 55 -50 45 0 1 0 N
+S -100 155 -50 145 0 1 0 N
+S -100 255 -50 245 0 1 0 N
+S -100 355 -50 345 0 1 0 N
+S -100 400 100 -400 0 1 0 N
+S 50 -345 100 -355 0 1 0 N
+S 50 -245 100 -255 0 1 0 N
+S 50 -145 100 -155 0 1 0 N
+S 50 -45 100 -55 0 1 0 N
+S 50 55 100 45 0 1 0 N
+S 50 155 100 145 0 1 0 N
+S 50 255 100 245 0 1 0 N
+S 50 355 100 345 0 1 0 N
+X P1 1 -250 350 150 R 50 50 1 1 P
+X P2 2 250 350 150 L 50 50 1 1 P
+X P3 3 -250 250 150 R 50 50 1 1 P
+X P4 4 250 250 150 L 50 50 1 1 P
+X P5 5 -250 150 150 R 50 50 1 1 P
+X P6 6 250 150 150 L 50 50 1 1 P
+X P7 7 -250 50 150 R 50 50 1 1 P
+X P8 8 250 50 150 L 50 50 1 1 P
+X P9 9 -250 -50 150 R 50 50 1 1 P
+X P10 10 250 -50 150 L 50 50 1 1 P
+X P11 11 -250 -150 150 R 50 50 1 1 P
+X P12 12 250 -150 150 L 50 50 1 1 P
+X P13 13 -250 -250 150 R 50 50 1 1 P
+X P14 14 250 -250 150 L 50 50 1 1 P
+X P15 15 -250 -350 150 R 50 50 1 1 P
+X P16 16 250 -350 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# CONN_02X20
+#
+DEF CONN_02X20 P 0 1 Y N 1 F N
+F0 "P" 0 1050 50 H V C CNN
+F1 "CONN_02X20" 0 0 50 V V C CNN
+F2 "" 0 -950 60 H V C CNN
+F3 "" 0 -950 60 H V C CNN
+$FPLIST
+ Pin_Header_Straight_2X20
+ Pin_Header_Angled_2X20
+ Socket_Strip_Straight_2X20
+ Socket_Strip_Angled_2X20
+$ENDFPLIST
+DRAW
+S -100 -945 -50 -955 0 1 0 N
+S -100 -845 -50 -855 0 1 0 N
+S -100 -745 -50 -755 0 1 0 N
+S -100 -645 -50 -655 0 1 0 N
+S -100 -545 -50 -555 0 1 0 N
+S -100 -445 -50 -455 0 1 0 N
+S -100 -345 -50 -355 0 1 0 N
+S -100 -245 -50 -255 0 1 0 N
+S -100 -145 -50 -155 0 1 0 N
+S -100 -45 -50 -55 0 1 0 N
+S -100 55 -50 45 0 1 0 N
+S -100 155 -50 145 0 1 0 N
+S -100 255 -50 245 0 1 0 N
+S -100 355 -50 345 0 1 0 N
+S -100 455 -50 445 0 1 0 N
+S -100 555 -50 545 0 1 0 N
+S -100 655 -50 645 0 1 0 N
+S -100 755 -50 745 0 1 0 N
+S -100 855 -50 845 0 1 0 N
+S -100 955 -50 945 0 1 0 N
+S -100 1000 100 -1000 0 1 0 N
+S 50 -945 100 -955 0 1 0 N
+S 50 -845 100 -855 0 1 0 N
+S 50 -745 100 -755 0 1 0 N
+S 50 -645 100 -655 0 1 0 N
+S 50 -545 100 -555 0 1 0 N
+S 50 -445 100 -455 0 1 0 N
+S 50 -345 100 -355 0 1 0 N
+S 50 -245 100 -255 0 1 0 N
+S 50 -145 100 -155 0 1 0 N
+S 50 -45 100 -55 0 1 0 N
+S 50 55 100 45 0 1 0 N
+S 50 155 100 145 0 1 0 N
+S 50 255 100 245 0 1 0 N
+S 50 355 100 345 0 1 0 N
+S 50 455 100 445 0 1 0 N
+S 50 555 100 545 0 1 0 N
+S 50 655 100 645 0 1 0 N
+S 50 755 100 745 0 1 0 N
+S 50 855 100 845 0 1 0 N
+S 50 955 100 945 0 1 0 N
+X P1 1 -250 950 150 R 50 50 1 1 P
+X P2 2 250 950 150 L 50 50 1 1 P
+X P3 3 -250 850 150 R 50 50 1 1 P
+X P4 4 250 850 150 L 50 50 1 1 P
+X P5 5 -250 750 150 R 50 50 1 1 P
+X P6 6 250 750 150 L 50 50 1 1 P
+X P7 7 -250 650 150 R 50 50 1 1 P
+X P8 8 250 650 150 L 50 50 1 1 P
+X P9 9 -250 550 150 R 50 50 1 1 P
+X P10 10 250 550 150 L 50 50 1 1 P
+X P20 20 250 50 150 L 50 50 1 1 P
+X P30 30 250 -450 150 L 50 50 1 1 P
+X P40 40 250 -950 150 L 50 50 1 1 P
+X P11 11 -250 450 150 R 50 50 1 1 P
+X P21 21 -250 -50 150 R 50 50 1 1 P
+X P31 31 -250 -550 150 R 50 50 1 1 P
+X P12 12 250 450 150 L 50 50 1 1 P
+X P22 22 250 -50 150 L 50 50 1 1 P
+X P32 32 250 -550 150 L 50 50 1 1 P
+X P13 13 -250 350 150 R 50 50 1 1 P
+X P23 23 -250 -150 150 R 50 50 1 1 P
+X P33 33 -250 -650 150 R 50 50 1 1 P
+X P14 14 250 350 150 L 50 50 1 1 P
+X P24 24 250 -150 150 L 50 50 1 1 P
+X P34 34 250 -650 150 L 50 50 1 1 P
+X P15 15 -250 250 150 R 50 50 1 1 P
+X P25 25 -250 -250 150 R 50 50 1 1 P
+X P35 35 -250 -750 150 R 50 50 1 1 P
+X P16 16 250 250 150 L 50 50 1 1 P
+X P26 26 250 -250 150 L 50 50 1 1 P
+X P36 36 250 -750 150 L 50 50 1 1 P
+X P17 17 -250 150 150 R 50 50 1 1 P
+X P27 27 -250 -350 150 R 50 50 1 1 P
+X P37 37 -250 -850 150 R 50 50 1 1 P
+X P18 18 250 150 150 L 50 50 1 1 P
+X P28 28 250 -350 150 L 50 50 1 1 P
+X P38 38 250 -850 150 L 50 50 1 1 P
+X P19 19 -250 50 150 R 50 50 1 1 P
+X P29 29 -250 -450 150 R 50 50 1 1 P
+X P39 39 -250 -950 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# GND
+#
+DEF GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "GND" 0 -150 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+P 6 0 1 0  0 0  0 -50  50 -50  0 -100  -50 -50  0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+<<<<<<< HEAD
+=======
+# PWR_FLAG
+#
+DEF PWR_FLAG #FLG 0 0 N N 1 F P
+F0 "#FLG" 0 95 50 H I C CNN
+F1 "PWR_FLAG" 0 180 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+X pwr 1 0 0 0 U 20 20 0 0 w
+P 6 0 1 0  0 0  0 50  -75 100  0 150  75 100  0 50 N
+ENDDRAW
+ENDDEF
+#
+>>>>>>> d9ecea532afc911de3244f458589b6eadd051949
+# VCC
+#
+DEF VCC #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "VCC" 0 150 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+C 0 75 25 0 1 0 N
+P 2 0 1 0  0 0  0 50 N
+X VCC 1 0 0 0 U 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+#End Library

depends/rpi-rgb-led-matrix/adapter/passive-3/passive3-rpi-hub75-adapter.pro

@@ -0,0 +1,63 @@
+update=Wed 17 Jun 2015 07:02:16 PM PDT
+version=1
+last_client=kicad
+[cvpcb]
+version=1
+NetIExt=net
+[cvpcb/libraries]
+EquName1=devcms
+[general]
+version=1
+[pcbnew]
+version=1
+PageLayoutDescrFile=
+LastNetListRead=passive3-rpi-hub75-adapter.net
+UseCmpFile=0
+PadDrill=3.048
+PadDrillOvalY=3.048
+PadSizeH=4.064
+PadSizeV=4.064
+PcbTextSizeV=1.5
+PcbTextSizeH=1.5
+PcbTextThickness=0.3
+ModuleTextSizeV=1
+ModuleTextSizeH=1
+ModuleTextSizeThickness=0.15
+SolderMaskClearance=0
+SolderMaskMinWidth=0
+DrawSegmentWidth=0.2
+BoardOutlineThickness=0.09999999999999999
+ModuleOutlineThickness=0.15
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
+LibName1=power
+LibName2=device
+LibName3=transistors
+LibName4=conn
+LibName5=linear
+LibName6=regul
+LibName7=74xx
+LibName8=cmos4000
+LibName9=adc-dac
+LibName10=memory
+LibName11=xilinx
+LibName12=microcontrollers
+LibName13=dsp
+LibName14=microchip
+LibName15=analog_switches
+LibName16=motorola
+LibName17=texas
+LibName18=intel
+LibName19=audio
+LibName20=interface
+LibName21=digital-audio
+LibName22=philips
+LibName23=display
+LibName24=cypress
+LibName25=siliconi
+LibName26=opto
+LibName27=atmel
+LibName28=contrib
+LibName29=valves

depends/rpi-rgb-led-matrix/adapter/passive-3/passive3-rpi-hub75-adapter.sch

@@ -0,0 +1,408 @@
+EESchema Schematic File Version 2
+LIBS:power
+LIBS:device
+LIBS:transistors
+LIBS:conn
+LIBS:linear
+LIBS:regul
+LIBS:74xx
+LIBS:cmos4000
+LIBS:adc-dac
+LIBS:memory
+LIBS:xilinx
+LIBS:microcontrollers
+LIBS:dsp
+LIBS:microchip
+LIBS:analog_switches
+LIBS:motorola
+LIBS:texas
+LIBS:intel
+LIBS:audio
+LIBS:interface
+LIBS:digital-audio
+LIBS:philips
+LIBS:display
+LIBS:cypress
+LIBS:siliconi
+LIBS:opto
+LIBS:atmel
+LIBS:contrib
+LIBS:valves
+EELAYER 25 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L CONN_02X08 Panel-1
+U 1 1 54ECB236
+P 6950 2550
+F 0 "Panel-1" H 6950 3000 50  0000 C CNN
+F 1 "CONN_02X08" V 6950 2550 50  0000 C CNN
+F 2 "Pin_Headers:Pin_Header_Straight_2x08" H 6950 1350 60  0001 C CNN
+F 3 "" H 6950 1350 60  0000 C CNN
+	1    6950 2550
+	1    0    0    -1  
+$EndComp
+$Comp
+L CONN_02X20 P1
+U 1 1 54ECB2B7
+P 4500 3700
+F 0 "P1" H 4500 4750 50  0000 C CNN
+F 1 "CONN_02X20" V 4500 3700 50  0000 C CNN
+F 2 "Pin_Headers:Pin_Header_Straight_2x20" H 4500 2750 60  0001 C CNN
+F 3 "" H 4500 2750 60  0000 C CNN
+	1    4500 3700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4800 2700 4800 2850
+Wire Wire Line
+	4750 2750 4950 2750
+Wire Wire Line
+	4800 2850 4750 2850
+Connection ~ 4800 2750
+$Comp
+L GND #PWR01
+U 1 1 54ECB3E1
+P 4850 3350
+F 0 "#PWR01" H 4850 3350 30  0001 C CNN
+F 1 "GND" H 4850 3280 30  0001 C CNN
+F 2 "" H 4850 3350 60  0000 C CNN
+F 3 "" H 4850 3350 60  0000 C CNN
+	1    4850 3350
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	4750 3350 4850 3350
+$Comp
+L GND #PWR02
+U 1 1 54ECB417
+P 4850 3650
+F 0 "#PWR02" H 4850 3650 30  0001 C CNN
+F 1 "GND" H 4850 3580 30  0001 C CNN
+F 2 "" H 4850 3650 60  0000 C CNN
+F 3 "" H 4850 3650 60  0000 C CNN
+	1    4850 3650
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	4750 3650 4850 3650
+$Comp
+L GND #PWR03
+U 1 1 54ECB4A1
+P 4850 2950
+F 0 "#PWR03" H 4850 2950 30  0001 C CNN
+F 1 "GND" H 4850 2880 30  0001 C CNN
+F 2 "" H 4850 2950 60  0000 C CNN
+F 3 "" H 4850 2950 60  0000 C CNN
+	1    4850 2950
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	4750 2950 4850 2950
+$Comp
+L GND #PWR04
+U 1 1 54ECB5FE
+P 4150 4650
+F 0 "#PWR04" H 4150 4650 30  0001 C CNN
+F 1 "GND" H 4150 4580 30  0001 C CNN
+F 2 "" H 4150 4650 60  0000 C CNN
+F 3 "" H 4150 4650 60  0000 C CNN
+	1    4150 4650
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	4150 4650 4250 4650
+$Comp
+L GND #PWR05
+U 1 1 54ECB73E
+P 4850 4350
+F 0 "#PWR05" H 4850 4350 30  0001 C CNN
+F 1 "GND" H 4850 4280 30  0001 C CNN
+F 2 "" H 4850 4350 60  0000 C CNN
+F 3 "" H 4850 4350 60  0000 C CNN
+	1    4850 4350
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	4750 4350 4850 4350
+$Comp
+L GND #PWR06
+U 1 1 54ECB7BC
+P 4150 3950
+F 0 "#PWR06" H 4150 3950 30  0001 C CNN
+F 1 "GND" H 4150 3880 30  0001 C CNN
+F 2 "" H 4150 3950 60  0000 C CNN
+F 3 "" H 4150 3950 60  0000 C CNN
+	1    4150 3950
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	4150 3950 4250 3950
+Text GLabel 4250 3050 0    51   Output ~ 0
+strobe
+Text GLabel 4750 4250 2    51   Output ~ 0
+p1_r1
+Text GLabel 4250 4150 0    51   Output ~ 0
+p1_g1
+Text GLabel 4250 4250 0    51   Output ~ 0
+p1_b1
+Text GLabel 4250 4450 0    51   Output ~ 0
+p1_r2
+Text GLabel 4250 4350 0    51   Output ~ 0
+p1_g2
+Text GLabel 4750 4550 2    51   Output ~ 0
+p1_b2
+Text GLabel 4250 3450 0    51   Output ~ 0
+row_A
+Text GLabel 4750 3450 2    51   Output ~ 0
+row_B
+Text GLabel 4750 3550 2    51   Output ~ 0
+row_C
+Text GLabel 4750 3750 2    51   Output ~ 0
+row_D
+Text GLabel 4250 3250 0    51   Output ~ 0
+clock
+Text GLabel 4250 3850 0    51   Output ~ 0
+p0_r1
+Text GLabel 4250 3350 0    51   Output ~ 0
+p0_g1
+Text GLabel 4750 3950 2    51   Output ~ 0
+p0_b1
+Text GLabel 4750 3850 2    51   Output ~ 0
+p0_r2
+Text GLabel 4250 3750 0    51   Output ~ 0
+p0_g2
+Text GLabel 4250 3650 0    51   Output ~ 0
+p0_b2
+Text GLabel 4750 3250 2    51   Output ~ 0
+OE
+Wire Wire Line
+	7200 2500 7750 2500
+$Comp
+L GND #PWR07
+U 1 1 54ECD031
+P 7750 2950
+F 0 "#PWR07" H 7750 2950 30  0001 C CNN
+F 1 "GND" H 7750 2880 30  0001 C CNN
+F 2 "" H 7750 2950 60  0000 C CNN
+F 3 "" H 7750 2950 60  0000 C CNN
+	1    7750 2950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7200 2900 7750 2900
+Wire Wire Line
+	7200 2300 7750 2300
+$Comp
+L CONN_02X08 Panel-2
+U 1 1 54ECE201
+P 6950 3800
+F 0 "Panel-2" H 6950 4250 50  0000 C CNN
+F 1 "CONN_02X08" V 6950 3800 50  0000 C CNN
+F 2 "Pin_Headers:Pin_Header_Straight_2x08" H 6950 2600 60  0001 C CNN
+F 3 "" H 6950 2600 60  0000 C CNN
+	1    6950 3800
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7200 3750 7750 3750
+$Comp
+L GND #PWR08
+U 1 1 54ECE20E
+P 7750 4200
+F 0 "#PWR08" H 7750 4200 30  0001 C CNN
+F 1 "GND" H 7750 4130 30  0001 C CNN
+F 2 "" H 7750 4200 60  0000 C CNN
+F 3 "" H 7750 4200 60  0000 C CNN
+	1    7750 4200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7200 4150 7750 4150
+Wire Wire Line
+	7200 3550 7750 3550
+$Comp
+L VCC #PWR09
+U 1 1 54ECD3DE
+P 4800 2700
+F 0 "#PWR09" H 4800 2800 30  0001 C CNN
+F 1 "VCC" H 4800 2800 30  0000 C CNN
+F 2 "" H 4800 2700 60  0000 C CNN
+F 3 "" H 4800 2700 60  0000 C CNN
+	1    4800 2700
+	1    0    0    -1  
+$EndComp
+Text GLabel 7200 3650 2    51   Input ~ 0
+p1_g2
+Wire Wire Line
+	7750 3550 7750 4200
+Connection ~ 7750 4150
+Connection ~ 7750 3750
+Text GLabel 7200 3450 2    51   Input ~ 0
+p1_g1
+Wire Wire Line
+	7750 2300 7750 2950
+Connection ~ 7750 2500
+Connection ~ 7750 2900
+Text GLabel 7200 2400 2    51   Input ~ 0
+p0_g2
+Text GLabel 7200 2200 2    51   Input ~ 0
+p0_g1
+Text GLabel 7200 2700 2    51   Input ~ 0
+row_D
+Text GLabel 7200 2600 2    51   Input ~ 0
+row_B
+Text GLabel 7200 3850 2    51   Input ~ 0
+row_B
+Text GLabel 7200 3950 2    51   Input ~ 0
+row_D
+Text GLabel 6700 2200 0    51   Input ~ 0
+p0_r1
+Text GLabel 6700 2800 0    51   Input ~ 0
+clock
+Text GLabel 6700 2500 0    51   Input ~ 0
+p0_b2
+Text GLabel 6700 2300 0    51   Input ~ 0
+p0_b1
+Text GLabel 6700 2400 0    51   Input ~ 0
+p0_r2
+Text GLabel 6700 2900 0    51   Input ~ 0
+OE
+Text GLabel 6700 3450 0    51   Input ~ 0
+p1_r1
+Text GLabel 6700 3550 0    51   Input ~ 0
+p1_b1
+Text GLabel 6700 3650 0    51   Input ~ 0
+p1_r2
+Text GLabel 6700 3750 0    51   Input ~ 0
+p1_b2
+Text GLabel 6700 4050 0    51   Input ~ 0
+clock
+Text GLabel 6700 4150 0    51   Input ~ 0
+OE
+Text GLabel 4750 3050 2    51   Output ~ 0
+p2_r1
+Text GLabel 4250 2850 0    51   Output ~ 0
+p2_g1
+Text GLabel 4250 2950 0    51   Output ~ 0
+p2_b1
+Text GLabel 4250 4550 0    51   Output ~ 0
+p2_r2
+Text GLabel 4750 4450 2    51   Output ~ 0
+p2_g2
+Text GLabel 4750 4650 2    51   Output ~ 0
+p2_b2
+Text GLabel 6700 3850 0    51   Input ~ 0
+row_A
+Text GLabel 6700 3950 0    51   Input ~ 0
+row_C
+Text GLabel 6700 2600 0    51   Input ~ 0
+row_A
+Text GLabel 6700 2700 0    51   Input ~ 0
+row_C
+Text GLabel 7200 4050 2    51   Input ~ 0
+strobe
+Text GLabel 7200 2800 2    51   Input ~ 0
+strobe
+$Comp
+L CONN_02X08 Panel-3
+U 1 1 54F3E6D5
+P 6950 5250
+F 0 "Panel-3" H 6950 5700 50  0000 C CNN
+F 1 "CONN_02X08" V 6950 5250 50  0000 C CNN
+F 2 "Pin_Headers:Pin_Header_Straight_2x08" H 6950 4050 60  0001 C CNN
+F 3 "" H 6950 4050 60  0000 C CNN
+	1    6950 5250
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7200 5200 7750 5200
+$Comp
+L GND #PWR010
+U 1 1 54F3E6DC
+P 7750 5650
+F 0 "#PWR010" H 7750 5650 30  0001 C CNN
+F 1 "GND" H 7750 5580 30  0001 C CNN
+F 2 "" H 7750 5650 60  0000 C CNN
+F 3 "" H 7750 5650 60  0000 C CNN
+	1    7750 5650
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7200 5600 7750 5600
+Wire Wire Line
+	7200 5000 7750 5000
+Text GLabel 7200 5100 2    51   Input ~ 0
+p2_g2
+Wire Wire Line
+	7750 5000 7750 5650
+Connection ~ 7750 5600
+Connection ~ 7750 5200
+Text GLabel 7200 4900 2    51   Input ~ 0
+p2_g1
+Text GLabel 7200 5300 2    51   Input ~ 0
+row_B
+Text GLabel 7200 5400 2    51   Input ~ 0
+row_D
+Text GLabel 6700 4900 0    51   Input ~ 0
+p2_r1
+Text GLabel 6700 5000 0    51   Input ~ 0
+p2_b1
+Text GLabel 6700 5100 0    51   Input ~ 0
+p2_r2
+Text GLabel 6700 5200 0    51   Input ~ 0
+p2_b2
+Text GLabel 6700 5500 0    51   Input ~ 0
+clock
+Text GLabel 6700 5600 0    51   Input ~ 0
+OE
+Text GLabel 6700 5300 0    51   Input ~ 0
+row_A
+Text GLabel 6700 5400 0    51   Input ~ 0
+row_C
+Text GLabel 7200 5500 2    51   Input ~ 0
+strobe
+NoConn ~ 4250 2750
+NoConn ~ 4250 3150
+NoConn ~ 4250 3550
+NoConn ~ 4250 4050
+NoConn ~ 4750 4050
+NoConn ~ 4750 4150
+NoConn ~ 4750 3150
+$Comp
+L PWR_FLAG #FLG011
+U 1 1 557B29FD
+P 4950 2750
+F 0 "#FLG011" H 4950 2845 50  0001 C CNN
+F 1 "PWR_FLAG" H 4950 2930 50  0000 C CNN
+F 2 "" H 4950 2750 60  0000 C CNN
+F 3 "" H 4950 2750 60  0000 C CNN
+	1    4950 2750
+	1    0    0    -1  
+$EndComp
+$Comp
+L PWR_FLAG #FLG012
+U 1 1 557B2BFC
+P 4200 4700
+F 0 "#FLG012" H 4200 4795 50  0001 C CNN
+F 1 "PWR_FLAG" H 4200 4880 50  0000 C CNN
+F 2 "" H 4200 4700 60  0000 C CNN
+F 3 "" H 4200 4700 60  0000 C CNN
+	1    4200 4700
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	4200 4650 4200 4700
+Connection ~ 4200 4650
+$EndSCHEMATC

depends/rpi-rgb-led-matrix/adapter/passive-rpi1/Makefile

@@ -0,0 +1,3 @@
+include ../kicad-scripts/makefile.inc
+
+passive-rpi-hub75-adapter-fab.zip:

depends/rpi-rgb-led-matrix/adapter/passive-rpi1/README.md

@@ -0,0 +1,17 @@
+Adapter PCB to connect to Rasbperry Pi1
+=======================================
+
+   * Passive board. Simple, but might need to define `--led-slowdown-gpio` if you see
+     glitches.
+   * Supports one panel connected to a 26 pin Raspberry Pi 1. If you have a newer RPi,
+     check out the [Passive 3](../passive-3) or [Active 3](../active-3) adapter.
+   * Open source KiCAD PCB EDA format.
+   * (not very pretty layout, was just lazy and let the auto-router do it).
+   * The FAB files are provided as [passive-rpi-hub75-adapter-fab.zip](./passive-rpi-hub75-adapter-fab.zip)
+
+This board is [shared on OSH Park][osh-passive-rpi] (not affiliated)
+
+![Preview][rendering]
+
+[rendering]: ../../img/passive-rpi1-pcb.png
+[osh-passive-rpi]: https://oshpark.com/shared_projects/afEA1gNt

depends/rpi-rgb-led-matrix/adapter/passive-rpi1/passive-rpi-hub75-adapter-cache.lib

@@ -0,0 +1,150 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#
+# CONN_02X08
+#
+DEF CONN_02X08 P 0 1 Y N 1 F N
+F0 "P" 0 450 50 H V C CNN
+F1 "CONN_02X08" 0 0 50 V V C CNN
+F2 "" 0 -1200 60 H V C CNN
+F3 "" 0 -1200 60 H V C CNN
+$FPLIST
+ Pin_Header_Straight_2X08
+ Pin_Header_Angled_2X08
+ Socket_Strip_Straight_2X08
+ Socket_Strip_Angled_2X08
+$ENDFPLIST
+DRAW
+S -100 -345 -50 -355 0 1 0 N
+S -100 -245 -50 -255 0 1 0 N
+S -100 -145 -50 -155 0 1 0 N
+S -100 -45 -50 -55 0 1 0 N
+S -100 55 -50 45 0 1 0 N
+S -100 155 -50 145 0 1 0 N
+S -100 255 -50 245 0 1 0 N
+S -100 355 -50 345 0 1 0 N
+S -100 400 100 -400 0 1 0 N
+S 50 -345 100 -355 0 1 0 N
+S 50 -245 100 -255 0 1 0 N
+S 50 -145 100 -155 0 1 0 N
+S 50 -45 100 -55 0 1 0 N
+S 50 55 100 45 0 1 0 N
+S 50 155 100 145 0 1 0 N
+S 50 255 100 245 0 1 0 N
+S 50 355 100 345 0 1 0 N
+X P1 1 -250 350 150 R 50 50 1 1 P
+X P2 2 250 350 150 L 50 50 1 1 P
+X P3 3 -250 250 150 R 50 50 1 1 P
+X P4 4 250 250 150 L 50 50 1 1 P
+X P5 5 -250 150 150 R 50 50 1 1 P
+X P6 6 250 150 150 L 50 50 1 1 P
+X P7 7 -250 50 150 R 50 50 1 1 P
+X P8 8 250 50 150 L 50 50 1 1 P
+X P9 9 -250 -50 150 R 50 50 1 1 P
+X P10 10 250 -50 150 L 50 50 1 1 P
+X P11 11 -250 -150 150 R 50 50 1 1 P
+X P12 12 250 -150 150 L 50 50 1 1 P
+X P13 13 -250 -250 150 R 50 50 1 1 P
+X P14 14 250 -250 150 L 50 50 1 1 P
+X P15 15 -250 -350 150 R 50 50 1 1 P
+X P16 16 250 -350 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# CONN_02X13
+#
+DEF CONN_02X13 P 0 1 Y N 1 F N
+F0 "P" 0 700 50 H V C CNN
+F1 "CONN_02X13" 0 0 50 V V C CNN
+F2 "" 0 -1150 60 H V C CNN
+F3 "" 0 -1150 60 H V C CNN
+$FPLIST
+ Pin_Header_Straight_2X13
+ Pin_Header_Angled_2X13
+ Socket_Strip_Straight_2X13
+ Socket_Strip_Angled_2X13
+$ENDFPLIST
+DRAW
+S -100 -595 -50 -605 0 1 0 N
+S -100 -495 -50 -505 0 1 0 N
+S -100 -395 -50 -405 0 1 0 N
+S -100 -295 -50 -305 0 1 0 N
+S -100 -195 -50 -205 0 1 0 N
+S -100 -95 -50 -105 0 1 0 N
+S -100 5 -50 -5 0 1 0 N
+S -100 105 -50 95 0 1 0 N
+S -100 205 -50 195 0 1 0 N
+S -100 305 -50 295 0 1 0 N
+S -100 405 -50 395 0 1 0 N
+S -100 505 -50 495 0 1 0 N
+S -100 605 -50 595 0 1 0 N
+S -100 650 100 -650 0 1 0 N
+S 50 -595 100 -605 0 1 0 N
+S 50 -495 100 -505 0 1 0 N
+S 50 -395 100 -405 0 1 0 N
+S 50 -295 100 -305 0 1 0 N
+S 50 -195 100 -205 0 1 0 N
+S 50 -95 100 -105 0 1 0 N
+S 50 5 100 -5 0 1 0 N
+S 50 105 100 95 0 1 0 N
+S 50 205 100 195 0 1 0 N
+S 50 305 100 295 0 1 0 N
+S 50 405 100 395 0 1 0 N
+S 50 505 100 495 0 1 0 N
+S 50 605 100 595 0 1 0 N
+X P1 1 -250 600 150 R 50 50 1 1 P
+X P2 2 250 600 150 L 50 50 1 1 P
+X P3 3 -250 500 150 R 50 50 1 1 P
+X P4 4 250 500 150 L 50 50 1 1 P
+X P5 5 -250 400 150 R 50 50 1 1 P
+X P6 6 250 400 150 L 50 50 1 1 P
+X P7 7 -250 300 150 R 50 50 1 1 P
+X P8 8 250 300 150 L 50 50 1 1 P
+X P9 9 -250 200 150 R 50 50 1 1 P
+X P10 10 250 200 150 L 50 50 1 1 P
+X P20 20 250 -300 150 L 50 50 1 1 P
+X P11 11 -250 100 150 R 50 50 1 1 P
+X P21 21 -250 -400 150 R 50 50 1 1 P
+X P12 12 250 100 150 L 50 50 1 1 P
+X P22 22 250 -400 150 L 50 50 1 1 P
+X P13 13 -250 0 150 R 50 50 1 1 P
+X P23 23 -250 -500 150 R 50 50 1 1 P
+X P14 14 250 0 150 L 50 50 1 1 P
+X P24 24 250 -500 150 L 50 50 1 1 P
+X P15 15 -250 -100 150 R 50 50 1 1 P
+X P25 25 -250 -600 150 R 50 50 1 1 P
+X P16 16 250 -100 150 L 50 50 1 1 P
+X P26 26 250 -600 150 L 50 50 1 1 P
+X P17 17 -250 -200 150 R 50 50 1 1 P
+X P18 18 250 -200 150 L 50 50 1 1 P
+X P19 19 -250 -300 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# GND
+#
+DEF GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "GND" 0 -150 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+P 6 0 1 0  0 0  0 -50  50 -50  0 -100  -50 -50  0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# PWR_FLAG
+#
+DEF PWR_FLAG #FLG 0 0 N N 1 F P
+F0 "#FLG" 0 95 50 H I C CNN
+F1 "PWR_FLAG" 0 180 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+X pwr 1 0 0 0 U 20 20 0 0 w
+P 6 0 1 0  0 0  0 50  -75 100  0 150  75 100  0 50 N
+ENDDRAW
+ENDDEF
+#
+#End Library

depends/rpi-rgb-led-matrix/adapter/passive-rpi1/passive-rpi-hub75-adapter.kicad_pcb

@@ -0,0 +1,591 @@
+(kicad_pcb (version 4) (host pcbnew "(2015-10-16 BZR 6271, Git e177d75)-product")
+
+  (general
+    (links 19)
+    (no_connects 0)
+    (area 83.657 38.37 122.550001 58.502333)
+    (thickness 1.6)
+    (drawings 9)
+    (tracks 128)
+    (zones 0)
+    (modules 2)
+    (nets 15)
+  )
+
+  (page A4)
+  (layers
+    (0 F.Cu signal)
+    (31 B.Cu signal)
+    (32 B.Adhes user)
+    (33 F.Adhes user)
+    (34 B.Paste user)
+    (35 F.Paste user)
+    (36 B.SilkS user)
+    (37 F.SilkS user)
+    (38 B.Mask user)
+    (39 F.Mask user)
+    (40 Dwgs.User user)
+    (41 Cmts.User user)
+    (42 Eco1.User user)
+    (43 Eco2.User user)
+    (44 Edge.Cuts user)
+    (45 Margin user)
+    (46 B.CrtYd user)
+    (47 F.CrtYd user)
+    (48 B.Fab user)
+    (49 F.Fab user)
+  )
+
+  (setup
+    (last_trace_width 0.254)
+    (trace_clearance 0.254)
+    (zone_clearance 0.508)
+    (zone_45_only no)
+    (trace_min 0.254)
+    (segment_width 0.2)
+    (edge_width 0.1)
+    (via_size 0.889)
+    (via_drill 0.635)
+    (via_min_size 0.889)
+    (via_min_drill 0.508)
+    (uvia_size 0.508)
+    (uvia_drill 0.127)
+    (uvias_allowed no)
+    (uvia_min_size 0.508)
+    (uvia_min_drill 0.127)
+    (pcb_text_width 0.3)
+    (pcb_text_size 1.5 1.5)
+    (mod_edge_width 0.15)
+    (mod_text_size 1 1)
+    (mod_text_width 0.15)
+    (pad_size 4.064 4.064)
+    (pad_drill 3.048)
+    (pad_to_mask_clearance 0)
+    (aux_axis_origin 0 0)
+    (visible_elements FFFFEF7F)
+    (pcbplotparams
+      (layerselection 0x010f0_80000001)
+      (usegerberextensions true)
+      (excludeedgelayer true)
+      (linewidth 0.100000)
+      (plotframeref false)
+      (viasonmask false)
+      (mode 1)
+      (useauxorigin false)
+      (hpglpennumber 1)
+      (hpglpenspeed 20)
+      (hpglpendiameter 15)
+      (hpglpenoverlay 2)
+      (psnegative false)
+      (psa4output false)
+      (plotreference true)
+      (plotvalue true)
+      (plotinvisibletext false)
+      (padsonsilk false)
+      (subtractmaskfromsilk false)
+      (outputformat 1)
+      (mirror false)
+      (drillshape 0)
+      (scaleselection 1)
+      (outputdirectory fab/))
+  )
+
+  (net 0 "")
+  (net 1 GND)
+  (net 2 strobe)
+  (net 3 p0_r1)
+  (net 4 p0_g1)
+  (net 5 OE)
+  (net 6 p0_b1)
+  (net 7 p0_r2)
+  (net 8 p0_g2)
+  (net 9 row_D)
+  (net 10 row_C)
+  (net 11 p0_b2)
+  (net 12 clock)
+  (net 13 row_B)
+  (net 14 row_A)
+
+  (net_class Default "This is the default net class."
+    (clearance 0.254)
+    (trace_width 0.254)
+    (via_dia 0.889)
+    (via_drill 0.635)
+    (uvia_dia 0.508)
+    (uvia_drill 0.127)
+    (add_net OE)
+    (add_net clock)
+    (add_net p0_b1)
+    (add_net p0_b2)
+    (add_net p0_g1)
+    (add_net p0_g2)
+    (add_net p0_r1)
+    (add_net p0_r2)
+    (add_net row_A)
+    (add_net row_B)
+    (add_net row_C)
+    (add_net row_D)
+    (add_net strobe)
+  )
+
+  (net_class power ""
+    (clearance 0.254)
+    (trace_width 0.254)
+    (via_dia 0.889)
+    (via_drill 0.635)
+    (uvia_dia 0.508)
+    (uvia_drill 0.127)
+    (add_net GND)
+  )
+
+  (module Pin_Headers:Pin_Header_Straight_2x08 (layer F.Cu) (tedit 557E1BCB) (tstamp 54F3AB27)
+    (at 95.25 53.34 90)
+    (descr "Through hole pin header")
+    (tags "pin header")
+    (path /54ECB236)
+    (fp_text reference Panel-1 (at 1.27 -2.54 90) (layer F.SilkS) hide
+      (effects (font (size 1 1) (thickness 0.15)))
+    )
+    (fp_text value CONN_02X08 (at 0 -3.1 90) (layer F.SilkS) hide
+      (effects (font (size 1 1) (thickness 0.15)))
+    )
+    (fp_line (start -1.75 -1.75) (end -1.75 19.55) (layer F.CrtYd) (width 0.05))
+    (fp_line (start 4.3 -1.75) (end 4.3 19.55) (layer F.CrtYd) (width 0.05))
+    (fp_line (start -1.75 -1.75) (end 4.3 -1.75) (layer F.CrtYd) (width 0.05))
+    (fp_line (start -1.75 19.55) (end 4.3 19.55) (layer F.CrtYd) (width 0.05))
+    (fp_line (start 3.81 19.05) (end 3.81 -1.27) (layer F.SilkS) (width 0.15))
+    (fp_line (start -1.27 1.27) (end -1.27 19.05) (layer F.SilkS) (width 0.15))
+    (fp_line (start 3.81 19.05) (end -1.27 19.05) (layer F.SilkS) (width 0.15))
+    (fp_line (start 3.81 -1.27) (end 1.27 -1.27) (layer F.SilkS) (width 0.15))
+    (fp_line (start 0 -1.55) (end -1.55 -1.55) (layer F.SilkS) (width 0.15))
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+      (net 3 p0_r1))
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+      (net 8 p0_g2))
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+      (net 13 row_B))
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+      (net 10 row_C))
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+      (net 9 row_D))
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+      (net 12 clock))
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+      (net 2 strobe))
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+      (net 5 OE))
+    (pad 16 thru_hole oval (at 2.54 17.78 90) (size 1.7272 1.7272) (drill 1.016) (layers *.Cu *.Mask F.SilkS)
+      (net 1 GND))
+    (model Pin_Headers.3dshapes/Pin_Header_Straight_2x08.wrl
+      (at (xyz 0.05 -0.35 0))
+      (scale (xyz 1 1 1))
+      (rotate (xyz 0 0 90))
+    )
+  )
+
+  (module Pin_Headers:Pin_Header_Straight_2x13 (layer F.Cu) (tedit 557E1BBF) (tstamp 557E12E7)
+    (at 88.9 43.815 90)
+    (descr "Through hole pin header")
+    (tags "pin header")
+    (path /54ECB2B7)
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+      (effects (font (size 1 1) (thickness 0.15)))
+    )
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+      (effects (font (size 1 1) (thickness 0.15)))
+    )
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+      (net 1 GND))
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+      (net 4 p0_g1))
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+      (net 1 GND))
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+      (net 9 row_D))
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+      (net 3 p0_r1))
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+      (net 7 p0_r2))
+    (pad 25 thru_hole oval (at 0 30.48 90) (size 1.7272 1.7272) (drill 1.016) (layers *.Cu *.Mask F.SilkS)
+      (net 1 GND))
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+      (net 6 p0_b1))
+  )
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+    (effects (font (size 1.2 1.2) (thickness 0.2)) (justify left mirror))
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depends/rpi-rgb-led-matrix/adapter/passive-rpi1/passive-rpi-hub75-adapter.pro

@@ -0,0 +1,62 @@
+update=Sun 14 Jun 2015 04:45:24 PM PDT
+version=1
+last_client=kicad
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+LibName27=atmel
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+SolderMaskClearance=0
+SolderMaskMinWidth=0
+DrawSegmentWidth=0.2
+BoardOutlineThickness=0.09999999999999999
+ModuleOutlineThickness=0.15

depends/rpi-rgb-led-matrix/adapter/passive-rpi1/passive-rpi-hub75-adapter.sch

@@ -0,0 +1,215 @@
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+LIBS:motorola
+LIBS:texas
+LIBS:intel
+LIBS:audio
+LIBS:interface
+LIBS:digital-audio
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+LIBS:siliconi
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+LIBS:atmel
+LIBS:contrib
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depends/rpi-rgb-led-matrix/bindings/README.md

@@ -0,0 +1,3 @@
+Various bindings to other programming languages.
+Typically these are wrapping the [C-binding](../include/led-matrix-c.h) that
+comes with rpi-rgb-led-matrix

depends/rpi-rgb-led-matrix/bindings/c#/.gitignore

@@ -0,0 +1,5 @@
+**/.vs
+**/bin
+**/obj
+**/*.sln
+**/*.csproj.user

depends/rpi-rgb-led-matrix/bindings/c#/Bindings.cs

@@ -0,0 +1,85 @@
+global using static RPiRgbLEDMatrix.Bindings;
+
+using System.Runtime.InteropServices;
+
+namespace RPiRgbLEDMatrix;
+
+/*
+Some of the extern methods listed below are marked with [SuppressGCTransition].
+This disables some GC checks that may take a long time. But such methods should
+be fast and trivial, otherwise the managed code may become unstable (see docs).
+Keep this in mind when changing the C/C++ side.
+
+https://learn.microsoft.com/dotnet/api/system.runtime.interopservices.suppressgctransitionattribute
+*/
+internal static class Bindings
+{
+    private const string Lib = "librgbmatrix.so.1";
+
+    [DllImport(Lib)]
+    public static extern IntPtr led_matrix_create(int rows, int chained, int parallel);
+
+    [DllImport(Lib, CharSet = CharSet.Ansi)]
+    public static extern IntPtr led_matrix_create_from_options_const_argv(
+        ref InternalRGBLedMatrixOptions options,
+        int argc,
+        string[] argv);
+
+    [DllImport(Lib)]
+    public static extern void led_matrix_delete(IntPtr matrix);
+
+    [DllImport(Lib)]
+    public static extern IntPtr led_matrix_create_offscreen_canvas(IntPtr matrix);
+
+    [DllImport(Lib)]
+    public static extern IntPtr led_matrix_swap_on_vsync(IntPtr matrix, IntPtr canvas);
+
+    [DllImport(Lib)]
+    public static extern IntPtr led_matrix_get_canvas(IntPtr matrix);
+
+    [DllImport(Lib)]
+    [SuppressGCTransition]
+    public static extern byte led_matrix_get_brightness(IntPtr matrix);
+
+    [DllImport(Lib)]
+    [SuppressGCTransition]
+    public static extern void led_matrix_set_brightness(IntPtr matrix, byte brightness);
+
+    [DllImport(Lib, CharSet = CharSet.Ansi)]
+    public static extern IntPtr load_font(string bdf_font_file);
+
+    [DllImport(Lib, CharSet = CharSet.Ansi)]
+    public static extern int draw_text(IntPtr canvas, IntPtr font, int x, int y, byte r, byte g, byte b,
+                                       string utf8_text, int extra_spacing);
+
+    [DllImport(Lib, CharSet = CharSet.Ansi)]
+    public static extern int vertical_draw_text(IntPtr canvas, IntPtr font, int x, int y, byte r, byte g, byte b,
+                                                string utf8_text, int kerning_offset);
+
+    [DllImport(Lib, CharSet = CharSet.Ansi)]
+    public static extern void delete_font(IntPtr font);
+
+    [DllImport(Lib)]
+    [SuppressGCTransition]
+    public static extern void led_canvas_get_size(IntPtr canvas, out int width, out int height);
+
+    [DllImport(Lib)]
+    [SuppressGCTransition]
+    public static extern void led_canvas_set_pixel(IntPtr canvas, int x, int y, byte r, byte g, byte b);
+
+    [DllImport(Lib)]
+    public static extern void led_canvas_set_pixels(IntPtr canvas, int x, int y, int width, int height,
+                                                    ref Color colors);
+
+    [DllImport(Lib)]
+    public static extern void led_canvas_clear(IntPtr canvas);
+
+    [DllImport(Lib)]
+    public static extern void led_canvas_fill(IntPtr canvas, byte r, byte g, byte b);
+
+    [DllImport(Lib)]
+    public static extern void draw_circle(IntPtr canvas, int xx, int y, int radius, byte r, byte g, byte b);
+
+    [DllImport(Lib)]
+    public static extern void draw_line(IntPtr canvas, int x0, int y0, int x1, int y1, byte r, byte g, byte b);
+}

depends/rpi-rgb-led-matrix/bindings/c#/Color.cs

@@ -0,0 +1,38 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Represents an RGB (red, green, blue) color
+/// </summary>
+public struct Color
+{
+    /// <summary>
+    /// The red component value of this instance.
+    /// </summary>
+    public byte R;
+
+    /// <summary>
+    /// The green component value of this instance.
+    /// </summary>
+    public byte G;
+
+    /// <summary>
+    /// The blue component value of this instance.
+    /// </summary>
+    public byte B;
+
+    /// <summary>
+    /// Creates a new color from the specified color values (red, green, and blue).
+    /// </summary>
+    /// <param name="r">The red component value.</param>
+    /// <param name="g">The green component value.</param>
+    /// <param name="b">The blue component value.</param>
+    public Color(int r, int g, int b) : this((byte)r, (byte)g, (byte)b) { }
+
+    /// <summary>
+    /// Creates a new color from the specified color values (red, green, and blue).
+    /// </summary>
+    /// <param name="r">The red component value.</param>
+    /// <param name="g">The green component value.</param>
+    /// <param name="b">The blue component value.</param>
+    public Color(byte r, byte g, byte b) => (R, G, B) = (r, g, b);
+}

depends/rpi-rgb-led-matrix/bindings/c#/InternalRGBLedMatrixOptions.cs

@@ -0,0 +1,50 @@
+using System.Runtime.InteropServices;
+
+namespace RPiRgbLEDMatrix;
+
+[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+internal struct InternalRGBLedMatrixOptions
+{
+    public IntPtr hardware_mapping;
+    public int rows;
+    public int cols;
+    public int chain_length;
+    public int parallel;
+    public int pwm_bits;
+    public int pwm_lsb_nanoseconds;
+    public int pwm_dither_bits;
+    public int brightness;
+    public int scan_mode;
+    public int row_address_type;
+    public int multiplexing;
+    public IntPtr led_rgb_sequence;
+    public IntPtr pixel_mapper_config;
+    public IntPtr panel_type;
+    public byte disable_hardware_pulsing;
+    public byte show_refresh_rate;
+    public byte inverse_colors;
+    public int limit_refresh_rate_hz;
+
+    public InternalRGBLedMatrixOptions(RGBLedMatrixOptions opt)
+    {
+        chain_length = opt.ChainLength;
+        rows = opt.Rows;
+        cols = opt.Cols;
+        hardware_mapping = Marshal.StringToHGlobalAnsi(opt.HardwareMapping);
+        inverse_colors = (byte)(opt.InverseColors ? 1 : 0);
+        led_rgb_sequence = Marshal.StringToHGlobalAnsi(opt.LedRgbSequence);
+        pixel_mapper_config = Marshal.StringToHGlobalAnsi(opt.PixelMapperConfig);
+        panel_type = Marshal.StringToHGlobalAnsi(opt.PanelType);
+        parallel = opt.Parallel;
+        multiplexing = (int)opt.Multiplexing;
+        pwm_bits = opt.PwmBits;
+        pwm_lsb_nanoseconds = opt.PwmLsbNanoseconds;
+        pwm_dither_bits = opt.PwmDitherBits;
+        scan_mode = (int)opt.ScanMode;
+        show_refresh_rate = (byte)(opt.ShowRefreshRate ? 1 : 0);
+        limit_refresh_rate_hz = opt.LimitRefreshRateHz;
+        brightness = opt.Brightness;
+        disable_hardware_pulsing = (byte)(opt.DisableHardwarePulsing ? 1 : 0);
+        row_address_type = opt.RowAddressType;
+    }
+};

depends/rpi-rgb-led-matrix/bindings/c#/Makefile

@@ -0,0 +1,34 @@
+# This Makefile is intended to be used only by the toplevel Makefile.
+# For any other purposes, use .NET SDK build tools directly
+
+# Don't forget to synchronize these variables with the 'RPiRgbLEDMatrix.csproj' file
+RGB_LIBDIR=../../lib
+RGB_LIBRARY_NAME=rgbmatrix
+RGB_LIBRARY=$(RGB_LIBDIR)/lib$(RGB_LIBRARY_NAME).so.1
+
+NUGET_VERSION = 1.0.0
+NUGET_ID = HZeller.RPiRgbLEDMatrix
+NUGET_CONFIG = Release
+
+NUGET_PACKAGE = /bin/$(NUGET_CONFIG)/$(NUGET_ID).$(NUGET_VERSION).nupkg
+
+$(NUGET_PACKAGE): $(RGB_LIBRARY)
+	dotnet pack -c $(NUGET_CONFIG) -p:SkipNative=false -p:PackageId=$(NUGET_ID) -p:Version=$(NUGET_VERSION)
+
+# The examples also depend on the 'RPiRgbLEDMatrix.csproj', but this will be handled by 'dotnet'
+build: $(RGB_LIBRARY)
+	dotnet build examples/FontExample/FontExample.csproj -p:SkipNative=false
+	dotnet build examples/MatrixRain/MatrixRain.csproj -p:SkipNative=false
+	dotnet build examples/MinimalExample/MinimalExample.csproj -p:SkipNative=false
+	dotnet build examples/PulsingBrightness/PulsingBrightness.csproj -p:SkipNative=false
+	dotnet build examples/Rotating3DCube/Rotating3DCube.csproj -p:SkipNative=false
+	dotnet build examples/PlayGIF/PlayGIF.csproj -p:SkipNative=false
+
+$(RGB_LIBRARY):
+	$(MAKE) -C $(RGB_LIBDIR)
+
+# Used by toplevel Makefile
+nuget: $(NUGET_PACKAGE)
+
+# Used in 'RPiRgbLEDMatrix.csproj'
+library: $(RGB_LIBRARY)

depends/rpi-rgb-led-matrix/bindings/c#/Multiplexing.cs

@@ -0,0 +1,11 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Type of multiplexing.
+/// </summary>
+public enum Multiplexing : int
+{
+    Direct = 0,
+    Stripe = 1,
+    Checker = 2
+}

depends/rpi-rgb-led-matrix/bindings/c#/README.md

@@ -0,0 +1,16 @@
+C# bindings for RGB Matrix library
+======================================
+
+Building
+--------
+
+To build the C# wrapper for the RGB Matrix C library you need to first have __.NET SDK__ installed. 
+
+### Install .NET SDK
+
+`sudo apt install dotnet6` should work in most cases.  
+For some old distributions, read [docs](https://learn.microsoft.com/dotnet/core/install/linux)
+
+Then, in the `bindings/c#` directory type: `dotnet build`
+
+To run the example applications in the c#\examples\EXAMPLE folder: `sudo dotnet run`

depends/rpi-rgb-led-matrix/bindings/c#/RGBLedCanvas.cs

@@ -0,0 +1,100 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Represents a canvas whose pixels can be manipulated.
+/// </summary>
+public class RGBLedCanvas
+{
+    // This is a wrapper for canvas no need to implement IDisposable here 
+    // because RGBLedMatrix has ownership and takes care of disposing canvases
+    internal IntPtr _canvas;
+
+    // this is not called directly by the consumer code,
+    // consumer uses factory methods in RGBLedMatrix
+    internal RGBLedCanvas(IntPtr canvas)
+    {
+        _canvas = canvas;
+        led_canvas_get_size(_canvas, out var width, out var height);
+        Width = width;
+        Height = height;
+    }
+
+    /// <summary>
+    /// The width of the canvas in pixels.
+    /// </summary>
+    public int Width { get; private set; }
+
+    /// <summary>
+    /// The height of the canvas in pixels.
+    /// </summary>
+    public int Height { get; private set; }
+
+    /// <summary>
+    /// Sets the color of a specific pixel.
+    /// </summary>
+    /// <param name="x">The X coordinate of the pixel.</param>
+    /// <param name="y">The Y coordinate of the pixel.</param>
+    /// <param name="color">New pixel color.</param>
+    public void SetPixel(int x, int y, Color color) => led_canvas_set_pixel(_canvas, x, y, color.R, color.G, color.B);
+
+    /// <summary>
+    /// Copies the colors from the specified buffer to a rectangle on the canvas.
+    /// </summary>
+    /// <param name="x">The X coordinate of the top-left pixel of the rectangle.</param>
+    /// <param name="y">The Y coordinate of the top-left pixel of the rectangle.</param>
+    /// <param name="width">Width of the rectangle.</param>
+    /// <param name="height">Height of the rectangle.</param>
+    /// <param name="colors">Buffer containing the colors to copy.</param>
+    public void SetPixels(int x, int y, int width, int height, Span<Color> colors)
+    {
+        if (colors.Length < width * height)
+            throw new ArgumentOutOfRangeException(nameof(colors));
+        led_canvas_set_pixels(_canvas, x, y, width, height, ref colors[0]);
+    }
+
+    /// <summary>
+    /// Sets the color of the entire canvas.
+    /// </summary>
+    /// <param name="color">New canvas color.</param>
+    public void Fill(Color color) => led_canvas_fill(_canvas, color.R, color.G, color.B);
+
+    /// <summary>
+    /// Cleans the entire canvas.
+    /// </summary>
+    public void Clear() => led_canvas_clear(_canvas);
+
+    /// <summary>
+    /// Draws a circle of the specified color.
+    /// </summary>
+    /// <param name="x">The X coordinate of the center.</param>
+    /// <param name="y">The Y coordinate of the center.</param>
+    /// <param name="radius">The radius of the circle, in pixels.</param>
+    /// <param name="color">The color of the circle.</param>
+    public void DrawCircle(int x, int y, int radius, Color color) =>
+        draw_circle(_canvas, x, y, radius, color.R, color.G, color.B);
+
+    /// <summary>
+    /// Draws a line of the specified color.
+    /// </summary>
+    /// <param name="x0">The X coordinate of the first point.</param>
+    /// <param name="y0">The Y coordinate of the first point.</param>
+    /// <param name="x1">The X coordinate of the second point.</param>
+    /// <param name="y1">The Y coordinate of the second point.</param>
+    /// <param name="color">The color of the line.</param>
+    public void DrawLine(int x0, int y0, int x1, int y1, Color color) =>
+        draw_line(_canvas, x0, y0, x1, y1, color.R, color.G, color.B);
+
+    /// <summary>
+    /// Draws the text with the specified color.
+    /// </summary>
+    /// <param name="font">Font to draw text with.</param>
+    /// <param name="x">The X coordinate of the starting point.</param>
+    /// <param name="y">The Y coordinate of the starting point.</param>
+    /// <param name="color">The color of the text.</param>
+    /// <param name="text">Text to draw.</param>
+    /// <param name="spacing">Additional spacing between characters.</param>
+    /// <param name="vertical">Whether to draw the text vertically.</param>
+    /// <returns>How many pixels was advanced on the screen.</returns>
+    public int DrawText(RGBLedFont font, int x, int y, Color color, string text, int spacing = 0, bool vertical = false) =>
+        font.DrawText(_canvas, x, y, color, text, spacing, vertical);
+}

depends/rpi-rgb-led-matrix/bindings/c#/RGBLedFont.cs

@@ -0,0 +1,40 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Represents a <c>.BDF</c> font.
+/// </summary>
+public class RGBLedFont : IDisposable
+{
+    internal IntPtr _font;
+    private bool disposedValue = false;
+
+    /// <summary>
+    /// Loads the BDF font from the specified file.
+    /// </summary>
+    /// <param name="bdfFontPath">The path to the BDF file to load.</param>
+    public RGBLedFont(string bdfFontPath) => _font = load_font(bdfFontPath);
+
+    internal int DrawText(IntPtr canvas, int x, int y, Color color, string text, int spacing = 0, bool vertical = false)
+    {
+        if (!vertical)
+            return draw_text(canvas, _font, x, y, color.R, color.G, color.B, text, spacing);
+        else
+            return vertical_draw_text(canvas, _font, x, y, color.R, color.G, color.B, text, spacing);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposedValue) return;
+        delete_font(_font);
+        disposedValue = true;
+    }
+
+    ~RGBLedFont() => Dispose(false);
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+}

depends/rpi-rgb-led-matrix/bindings/c#/RGBLedMatrix.cs

@@ -0,0 +1,112 @@
+using System.Buffers;
+using System.Runtime.InteropServices;
+
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Represents a RGB matrix.
+/// </summary>
+public class RGBLedMatrix : IDisposable
+{
+    private IntPtr matrix;
+    private bool disposedValue = false;
+
+    /// <summary>
+    /// Initializes a new matrix.
+    /// </summary>
+    /// <param name="rows">Size of a single module. Can be 32, 16 or 8.</param>
+    /// <param name="chained">How many modules are connected in a chain.</param>
+    /// <param name="parallel">How many modules are connected in a parallel.</param>
+    public RGBLedMatrix(int rows, int chained, int parallel)
+    {
+        matrix = led_matrix_create(rows, chained, parallel);
+        if (matrix == (IntPtr)0)
+            throw new ArgumentException("Could not initialize a new matrix");
+    }
+
+    /// <summary>
+    /// Initializes a new matrix.
+    /// </summary>
+    /// <param name="options">A configuration of a matrix.</param>
+    public RGBLedMatrix(RGBLedMatrixOptions options)
+    {
+        InternalRGBLedMatrixOptions opt = default;
+        try
+        {
+            opt = new(options);
+            var args = Environment.GetCommandLineArgs();
+
+            // Because gpio-slowdown is not provided in the options struct,
+            // we manually add it.
+            // Let's add it first to the command-line we pass to the
+            // matrix constructor, so that it can be overridden with the
+            // users' commandline.
+            // As always, as the _very_ first, we need to provide the
+            // program name argv[0].
+            var argv = new string[args.Length + 1];
+            argv[0] = args[0];
+            argv[1] = $"--led-slowdown-gpio={options.GpioSlowdown}";
+            Array.Copy(args, 1, argv, 2, args.Length - 1);
+
+            matrix = led_matrix_create_from_options_const_argv(ref opt, argv.Length, argv);
+            if (matrix == (IntPtr)0)
+                throw new ArgumentException("Could not initialize a new matrix");
+        }
+        finally
+        {
+            if(options.HardwareMapping is not null) Marshal.FreeHGlobal(opt.hardware_mapping);
+            if(options.LedRgbSequence is not null) Marshal.FreeHGlobal(opt.led_rgb_sequence);
+            if(options.PixelMapperConfig is not null) Marshal.FreeHGlobal(opt.pixel_mapper_config);
+            if(options.PanelType is not null) Marshal.FreeHGlobal(opt.panel_type);
+        }
+    }
+
+    /// <summary>
+    /// Creates a new backbuffer canvas for drawing on.
+    /// </summary>
+    /// <returns>An instance of <see cref="RGBLedCanvas"/> representing the canvas.</returns>
+    public RGBLedCanvas CreateOffscreenCanvas() => new(led_matrix_create_offscreen_canvas(matrix));
+
+    /// <summary>
+    /// Returns a canvas representing the current frame buffer.
+    /// </summary>
+    /// <returns>An instance of <see cref="RGBLedCanvas"/> representing the canvas.</returns>
+    /// <remarks>Consider using <see cref="CreateOffscreenCanvas"/> instead.</remarks>
+    public RGBLedCanvas GetCanvas() => new(led_matrix_get_canvas(matrix));
+
+    /// <summary>
+    /// Swaps this canvas with the currently active canvas. The active canvas
+    /// becomes a backbuffer and is mapped to <paramref name="canvas"/> instance.
+    /// <br/>
+    /// This operation guarantees vertical synchronization.
+    /// </summary>
+    /// <param name="canvas">Backbuffer canvas to swap.</param>
+    public void SwapOnVsync(RGBLedCanvas canvas) =>
+        canvas._canvas = led_matrix_swap_on_vsync(matrix, canvas._canvas);
+
+    /// <summary>
+    /// The general brightness of the matrix.
+    /// </summary>
+    public byte Brightness
+    {
+        get => led_matrix_get_brightness(matrix);
+        set => led_matrix_set_brightness(matrix, value);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposedValue) return;
+
+        led_matrix_delete(matrix);
+        disposedValue = true;
+    }
+
+    ~RGBLedMatrix() => Dispose(false);
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+}

depends/rpi-rgb-led-matrix/bindings/c#/RGBLedMatrixOptions.cs

@@ -0,0 +1,124 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Represents the matrix settings.
+/// </summary>
+public struct RGBLedMatrixOptions
+{
+    /// <summary>
+    /// Name of the hardware mapping used. If passed
+    /// <see langword="null"/> here, the default is used.
+    /// </summary>
+    public string? HardwareMapping = null;
+
+    /// <summary>
+    /// The "rows" are the number of rows supported by the display, so 32 or 16.
+    /// Default: 32.
+    /// </summary>
+    public int Rows = 32;
+
+    /// <summary>
+    /// The "cols" are the number of columns per panel. Typically something
+    /// like 32, but also 64 is possible. Sometimes even 40.
+    /// <c>cols * chain_length</c> is the total length of the display, so you can
+    /// represent a 64 wide display as cols=32, chain=2 or cols=64, chain=1;
+    /// same thing, but more convenient to think of.
+    /// </summary>
+    public int Cols = 32;
+
+    /// <summary>
+    /// The chain_length is the number of displays daisy-chained together
+    /// (output of one connected to input of next). Default: 1
+    /// </summary>
+    public int ChainLength = 1;
+
+    /// <summary>
+    /// The number of parallel chains connected to the Pi; in old Pis with 26
+    /// GPIO pins, that is 1, in newer Pis with 40 interfaces pins, that can also
+    /// be 2 or 3. The effective number of pixels in vertical direction is then
+    /// thus <c>rows * parallel</c>. Default: 1
+    /// </summary>
+    public int Parallel = 1;
+
+    /// <summary>
+    /// Set PWM bits used for output. Default is 11, but if you only deal with limited
+    /// comic-colors, 1 might be sufficient. Lower require less CPU and increases refresh-rate.
+    /// </summary>
+    public int PwmBits = 11;
+
+    /// <summary>
+    /// Change the base time-unit for the on-time in the lowest significant bit in
+    /// nanoseconds. Higher numbers provide better quality (more accurate color, less
+    /// ghosting), but have a negative impact on the frame rate.
+    /// </summary>
+    public int PwmLsbNanoseconds = 130;
+
+    /// <summary>
+    /// The lower bits can be time-dithered for higher refresh rate.
+    /// </summary>
+    public int PwmDitherBits = 0;
+
+    /// <summary>
+    /// The initial brightness of the panel in percent. Valid range is 1..100
+    /// </summary>
+    public int Brightness = 100;
+
+    /// <summary>
+    /// Scan mode.
+    /// </summary>
+    public ScanModes ScanMode = ScanModes.Progressive;
+
+    /// <summary>
+    /// Default row address type is 0, corresponding to direct setting of the
+    /// row, while row address type 1 is used for panels that only have A/B,
+    /// typically some 64x64 panels
+    /// </summary>
+    public int RowAddressType = 0;
+
+    /// <summary>
+    /// Type of multiplexing.
+    /// </summary>
+    public Multiplexing Multiplexing = Multiplexing.Direct;
+
+    /// <summary>
+    /// In case the internal sequence of mapping is not <c>"RGB"</c>, this
+    /// contains the real mapping. Some panels mix up these colors.
+    /// </summary>
+    public string? LedRgbSequence = null;
+
+    /// <summary>
+    /// A string describing a sequence of pixel mappers that should be applied
+    /// to this matrix. A semicolon-separated list of pixel-mappers with optional
+    /// parameter.
+    public string? PixelMapperConfig = null;
+
+    /// <summary>
+    /// Panel type. Typically just empty, but certain panels (FM6126)
+    /// requie an initialization sequence
+    /// </summary>
+    public string? PanelType = null;
+
+    /// <summary>
+    /// Allow to use the hardware subsystem to create pulses. This won't do
+    /// anything if output enable is not connected to GPIO 18.
+    /// </summary>
+    public bool DisableHardwarePulsing = false;
+    public bool ShowRefreshRate = false;
+    public bool InverseColors = false;
+
+    /// <summary>
+    /// Limit refresh rate of LED panel. This will help on a loaded system
+    /// to keep a constant refresh rate. &lt;= 0 for no limit.
+    /// </summary>
+    public int LimitRefreshRateHz = 0;
+
+    /// <summary>
+    /// Slowdown GPIO. Needed for faster Pis/slower panels.
+    /// </summary>
+    public int GpioSlowdown = 1;
+
+    /// <summary>
+    /// Creates default matrix settings.
+    /// </summary>
+    public RGBLedMatrixOptions() { }
+}

depends/rpi-rgb-led-matrix/bindings/c#/RPiRgbLEDMatrix.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+    </PropertyGroup>
+
+    <!-- Skip builing native libraries by default on Windows -->
+    <PropertyGroup Condition="$(SkipNative) == '' and $(OS) != 'Unix'">
+        <SkipNative>true</SkipNative>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <Compile Remove="examples\**" />
+        <None Remove="examples\**" />
+        <None Condition="$(SkipNative) != 'true'" Pack="true" 
+              Include="..\..\lib\librgbmatrix.so.1"
+              PackagePath="\runtimes\linux-arm64\native" >
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </None>
+    </ItemGroup>
+
+    <Target Name="CompileNative" BeforeTargets="Compile" Condition="$(SkipNative) != 'true'">
+        <Message Text="Building native libraries" />
+        <Exec Command="make library" />
+    </Target>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/ScanModes.cs

@@ -0,0 +1,10 @@
+namespace RPiRgbLEDMatrix;
+
+/// <summary>
+/// Scan modes.
+/// </summary>
+public enum ScanModes
+{
+    Progressive = 0,
+    Interlaced = 1
+}

depends/rpi-rgb-led-matrix/bindings/c#/examples/FontExample/FontExample.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/examples/FontExample/Program.cs

@@ -0,0 +1,29 @@
+using RPiRgbLEDMatrix;
+
+if (args.Length < 1)
+{
+    Console.WriteLine("font-example.exe [font_path] <text>");
+    return -1;
+}
+string text = "Hello World!";
+if (args.Length > 1)
+    text = args[1];
+
+
+using var matrix = new RGBLedMatrix(32, 2, 1);
+var canvas = matrix.CreateOffscreenCanvas();
+using var font = new RGBLedFont(args[0]);
+
+canvas.DrawText(font, 1, 6, new Color(0, 255, 0), text);
+matrix.SwapOnVsync(canvas);
+
+// run until user presses Ctrl+C
+var running = true;
+Console.CancelKeyPress += (_, e) =>
+{
+    running = false;
+    e.Cancel = true; // do not terminate program with Ctrl+C, we need to dispose
+};
+while (running) Thread.Yield();
+
+return 0;

depends/rpi-rgb-led-matrix/bindings/c#/examples/MatrixRain/MatrixRain.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/examples/MatrixRain/Program.cs

@@ -0,0 +1,74 @@
+using RPiRgbLEDMatrix;
+
+const int MaxHeight = 16;
+const int ColorStep = 15;
+const int FrameStep = 1;
+
+using var matrix = new RGBLedMatrix(new RGBLedMatrixOptions { ChainLength = 2 });
+var canvas = matrix.CreateOffscreenCanvas();
+
+var rnd = new Random();
+var points = new List<Point>();
+var recycled = new Stack<Point>();
+var frame = 0;
+
+var running = true;
+Console.CancelKeyPress += (s, e) =>
+{
+    running = false;
+    e.Cancel = true; // don't terminate, we need to dispose
+};
+
+// run until user presses Ctrl+C
+while (running)
+{
+    var frameStart = Environment.TickCount64;
+    frame++;
+
+    if (frame % FrameStep == 0)
+    {
+        if (recycled.Count == 0)
+            points.Add(new Point(rnd.Next(0, canvas.Width - 1), 0));
+        else
+        {
+            var point = recycled.Pop();
+            point.X = rnd.Next(0, canvas.Width - 1);
+            point.Y = 0;
+            point.Recycled = false;
+        }
+    }
+
+    canvas.Clear();
+
+    foreach (var point in points)
+    {
+        if (point.Recycled) continue;
+        point.Y++;
+
+        if (point.Y - MaxHeight > canvas.Height)
+        {
+            point.Recycled = true;
+            recycled.Push(point);
+        }
+
+        for (var i = 0; i < MaxHeight; i++)
+        {
+            canvas.SetPixel(point.X, point.Y - i, new Color(0, 255 - i * ColorStep, 0));
+        }
+    }
+
+    matrix.SwapOnVsync(canvas);
+
+    // force 30 FPS
+    var elapsed = Environment.TickCount64 - frameStart;
+    if (elapsed < 33) Thread.Sleep(33 - (int)elapsed);
+}
+
+class Point
+{
+    public int X;
+    public int Y;
+    public bool Recycled = false;
+
+    public Point(int x, int y) => (X, Y) = (x, y);
+}

depends/rpi-rgb-led-matrix/bindings/c#/examples/MinimalExample/MinimalExample.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/examples/MinimalExample/Program.cs

@@ -0,0 +1,19 @@
+using RPiRgbLEDMatrix;
+
+using var matrix = new RGBLedMatrix(32, 2, 1);
+var canvas = matrix.CreateOffscreenCanvas();
+
+var centerX = canvas.Width / 2;
+var centerY = canvas.Height / 2;
+for (var i = 0; i < 1000; ++i)
+{
+    for (var y = 0; y < canvas.Height; ++y)
+        for (var x = 0; x < canvas.Width; ++x)
+            canvas.SetPixel(x, y, new Color(i & 0xFF, x, y));
+
+    canvas.DrawCircle(centerX, centerY, 6, new Color(0, 0, 255));
+    canvas.DrawLine(centerX - 3, centerY - 3, centerX + 3, centerY + 3, new Color(0, 0, 255));
+    canvas.DrawLine(centerX - 3, centerY + 3, centerX + 3, centerY - 3, new Color(0, 0, 255));
+
+    matrix.SwapOnVsync(canvas);
+}

depends/rpi-rgb-led-matrix/bindings/c#/examples/PlayGIF/PlayGIF.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net6.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj" />
+        <PackageReference Include="SixLabors.ImageSharp" Version="3.0.1" />
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/examples/PlayGIF/Program.cs

@@ -0,0 +1,40 @@
+using RPiRgbLEDMatrix;
+using System.Runtime.InteropServices;
+using Color = RPiRgbLEDMatrix.Color;
+
+Console.Write("GIF path: ");
+var path = Console.ReadLine()!;
+
+using var matrix = new RGBLedMatrix(32, 2, 1);
+var canvas = matrix.CreateOffscreenCanvas();
+
+Configuration.Default.PreferContiguousImageBuffers = true;
+using var image = Image.Load<Rgb24>(path);
+image.Mutate(o => o.Resize(canvas.Width, canvas.Height));
+
+var running = true;
+Console.CancelKeyPress += (s, e) =>
+{
+    running = false;
+    e.Cancel = true; // don't terminate, we need to dispose
+};
+
+var frame = -1;
+// preprocess frames to get delays and pixel buffers
+var frames = image.Frames
+    .Select(f => (
+        Pixels: f.DangerousTryGetSinglePixelMemory(out var memory) ? memory : throw new("Could not get pixel buffer"),
+        Delay: f.Metadata.GetGifMetadata().FrameDelay * 10
+    )).ToArray();
+
+// run until user presses Ctrl+C
+while (running)
+{
+    frame = (frame + 1) % frames.Length;
+
+    var data = MemoryMarshal.Cast<Rgb24, Color>(frames[frame].Pixels.Span);
+    canvas.SetPixels(0, 0, canvas.Width, canvas.Height, data);
+
+    matrix.SwapOnVsync(canvas);
+    Thread.Sleep(frames[frame].Delay);
+}

depends/rpi-rgb-led-matrix/bindings/c#/examples/PulsingBrightness/Program.cs

@@ -0,0 +1,33 @@
+using RPiRgbLEDMatrix;
+
+using var matrix = new RGBLedMatrix(new RGBLedMatrixOptions { Rows = 32, Cols = 64 });
+var canvas = matrix.CreateOffscreenCanvas();
+
+var maxBrightness = matrix.Brightness;
+var rnd = new Random();
+
+// run until user presses Ctrl+C
+var running = true;
+Console.CancelKeyPress += (_, e) =>
+{
+    running = false;
+    e.Cancel = true; // do not terminate program with Ctrl+C, we need to dispose
+};
+
+var color = new Color(rnd.Next(0, 256), rnd.Next(0, 256), rnd.Next(0, 256));
+while (running)
+{
+    if (matrix.Brightness < 1)
+    {
+        matrix.Brightness = maxBrightness;
+        color = new Color(rnd.Next(0, 256), rnd.Next(0, 256), rnd.Next(0, 256));
+    }
+    else
+    {
+        matrix.Brightness--;
+    }
+
+    canvas.Fill(color);
+    matrix.SwapOnVsync(canvas);
+    Thread.Sleep(20);
+}

depends/rpi-rgb-led-matrix/bindings/c#/examples/PulsingBrightness/PulsingBrightness.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/c#/examples/Rotating3DCube/Program.cs

@@ -0,0 +1,90 @@
+using RPiRgbLEDMatrix;
+using System.Numerics;
+
+const float MaxModuleSpeed = 0.1f;
+const float FOV = 60f;
+const float Scale = 1.1f;
+const float LerpPow = 0.002f;
+const int ChangePerFrames = 50;
+
+using var leds = new RGBLedMatrix(32, 1, 1);
+var canvas = leds.CreateOffscreenCanvas();
+
+var (centerX, centerY) = (canvas.Width / 2, canvas.Height / 2);
+
+var rnd = new Random();
+var angleSpeed = new Vector3();
+var nextAngleSpeed = new Vector3();
+var frame = -1;
+
+var rotateMatrix = Matrix4x4.Identity;
+var scaleMatrix = Matrix4x4.CreateScale(Scale);
+var projectMatrix = Matrix4x4.CreatePerspectiveFieldOfView(FOV / 180 * MathF.PI, 1, 0.1f, 100f);
+var cameraMatrix = Matrix4x4.CreateLookAt(new(0, 0, 4), new(0, 0, 0), new(0, 1, 0));
+
+// run until user presses Ctrl+C
+var running = true;
+Console.CancelKeyPress += (_, e) =>
+{
+    running = false;
+    e.Cancel = true; // do not terminate program with Ctrl+C, we need to dispose
+};
+while (running)
+{
+    var frameStart = Environment.TickCount64;
+
+    // update angle speed
+    frame = (frame + 1) % ChangePerFrames;
+    if(frame == 0)
+        nextAngleSpeed = new Vector3(
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed,
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed,
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed
+        );
+
+    angleSpeed = Vector3.Lerp(angleSpeed, nextAngleSpeed, LerpPow);
+
+    // update matrices
+    rotateMatrix *= Matrix4x4.CreateRotationX(angleSpeed.X);
+    rotateMatrix *= Matrix4x4.CreateRotationY(angleSpeed.Y);
+    rotateMatrix *= Matrix4x4.CreateRotationZ(angleSpeed.Z);
+    var matrix = scaleMatrix * rotateMatrix * cameraMatrix * projectMatrix;
+
+    // calculate points
+    var top1 = Vector4.Transform(new Vector3( 1,  1,  1), matrix);
+    var top2 = Vector4.Transform(new Vector3(-1,  1,  1), matrix);
+    var top3 = Vector4.Transform(new Vector3(-1,  1, -1), matrix);
+    var top4 = Vector4.Transform(new Vector3( 1,  1, -1), matrix);
+
+    var bot1 = Vector4.Transform(new Vector3( 1, -1,  1), matrix);
+    var bot2 = Vector4.Transform(new Vector3(-1, -1,  1), matrix);
+    var bot3 = Vector4.Transform(new Vector3(-1, -1, -1), matrix);
+    var bot4 = Vector4.Transform(new Vector3( 1, -1, -1), matrix);
+
+    // draw
+    canvas.Fill(new(0, 0, 0));
+    DrawLine(top1, top2);
+    DrawLine(top2, top3);
+    DrawLine(top3, top4);
+    DrawLine(top4, top1);
+
+    DrawLine(bot1, bot2);
+    DrawLine(bot2, bot3);
+    DrawLine(bot3, bot4);
+    DrawLine(bot4, bot1);
+
+    DrawLine(top1, bot1);
+    DrawLine(top2, bot2);
+    DrawLine(top3, bot3);
+    DrawLine(top4, bot4);
+
+    leds.SwapOnVsync(canvas);
+    // force 30 FPS
+    var elapsed = Environment.TickCount64 - frameStart;
+    if (elapsed < 33) Thread.Sleep(33 - (int)elapsed);
+}
+
+void DrawLine(Vector4 a, Vector4 b) => canvas.DrawLine(
+    (int)(a.X * a.W + centerX), (int)(a.Y * a.W + centerY),
+    (int)(b.X * b.W + centerX), (int)(b.Y * b.W + centerY),
+    new(255, 255, 255));

depends/rpi-rgb-led-matrix/bindings/c#/examples/Rotating3DCube/Rotating3DCube.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>

depends/rpi-rgb-led-matrix/bindings/python/.gitignore

@@ -0,0 +1 @@
+build/*

depends/rpi-rgb-led-matrix/bindings/python/Makefile

@@ -0,0 +1,92 @@
+# TODO: This contains a lot of {c|p}ython build boilerplate, this needs cleanup.
+PYTHON     ?= python
+SETUP      := setup.py
+BUILD_ARGS := build --build-lib .
+INST_ARGS  := install
+ifdef DESTDIR
+INST_ARGS  += --root=$(DESTDIR)
+endif
+CLEAN_ARGS := clean --all
+
+MANPAGES := $(patsubst %.txt,%,$(wildcard *.txt))
+TXTTOMAN := a2x -f manpage
+
+# Where our library resides. It is split between includes and the binary
+# library in lib
+RGB_LIBDIR=../../lib
+RGB_LIBRARY_NAME=rgbmatrix
+RGB_LIBRARY=$(RGB_LIBDIR)/lib$(RGB_LIBRARY_NAME).a
+
+ifneq "$(wildcard debian/changelog)" ""
+PKGNAME := $(shell dpkg-parsechangelog | sed -n 's/^Source: //p')
+VERSION := $(shell dpkg-parsechangelog | sed -n 's/^Version: \([^-]*\).*/\1/p')
+UPSDIST := $(PKGNAME)-$(VERSION).tar.gz
+DEBDIST := $(PKGNAME)_$(VERSION).orig.tar.gz
+endif
+
+all: build
+build: build-python
+install: install-python
+clean: clean-python
+	find ./rgbmatrix -type f -name \*.so -delete
+	find . -type f -name \*.pyc -delete
+	$(RM) build-* install-* test-*
+
+$(RGB_LIBRARY): FORCE
+	$(MAKE) -C $(RGB_LIBDIR)
+
+test: test-python
+test-python:
+ifneq "$(wildcard tests/*.py)" ""
+	nosetests -v -w tests
+else
+	$(info Test suite is not implemented...)
+endif
+
+ifneq "$(wildcard debian/control)" ""
+PYVERS := $(shell pyversions -r -v debian/control)
+PYEXEC := $(shell pyversions -d)
+BUILD_ARGS += --executable=/usr/bin/$(PYEXEC)
+INST_ARGS  += --no-compile -O0
+
+build-python: $(PYVERS:%=build-python-%)
+build-python-%: $(RGB_LIBRARY)
+	$(info * Doing build for $(PYTHON)$* ...)
+	$(PYTHON)$* $(SETUP) $(BUILD_ARGS)
+
+install-python: $(PYVERS:%=install-python-%)
+install-python-%:
+	$(info * Doing install for $(PYTHON)$* ...)
+	$(PYTHON)$* $(SETUP) $(INST_ARGS)
+
+clean-python: $(PYVERS:%=clean-python-%)
+clean-python-%:
+	$(PYTHON)$* $(SETUP) $(CLEAN_ARGS)
+else
+build-python: $(RGB_LIBRARY)
+	$(PYTHON) $(SETUP) $(BUILD_ARGS)
+
+install-python:
+	$(PYTHON) $(SETUP) $(INST_ARGS)
+
+clean-python:
+	$(PYTHON) $(SETUP) $(CLEAN_ARGS)
+endif
+
+distclean: clean
+dist: distclean
+	$(info * Creating ../$(UPSDIST) and ../$(DEBDIST))
+	@tar --exclude='.svn' \
+	    --exclude='*.swp' \
+	    --exclude='debian' \
+	    -czvf ../$(UPSDIST) \
+	    -C ../ $(notdir $(CURDIR))
+	@cp ../$(UPSDIST) ../$(DEBDIST)
+	@if test -d ../tarballs; then \
+		mv -v ../$(DEBDIST) ../tarballs; \
+	fi
+
+FORCE:
+.PHONY: FORCE
+.PHONY: build install test clean dist distclean
+.PHONY: build-python install-python clean-python

depends/rpi-rgb-led-matrix/bindings/python/README.md

@@ -0,0 +1,147 @@
+Python bindings for RGB Matrix library
+======================================
+
+Building
+--------
+
+If you have a different than the standard wiring (for instance if you have an
+Adafruit HAT), you can edit the [../../lib/Makefile](../../lib/Makefile#L26) first to choose
+the hardware in question (see below for setting it via command line argument).
+
+Then, in the root directory for the matrix library simply type:
+
+### Python 2
+
+```shell
+sudo apt-get update && sudo apt-get install python2.7-dev python-pillow -y
+make build-python
+sudo make install-python
+```
+
+### Python 3
+You can also build for Python 3:
+
+```shell
+sudo apt-get update && sudo apt-get install python3-dev python3-pillow -y
+make build-python PYTHON=$(command -v python3)
+sudo make install-python PYTHON=$(command -v python3)
+```
+
+### PyPy
+The cython binding to PyPy seems to be somewhat working but extremely slow (20x
+slower even than the regular Python binding, 160x slower than C++), so this is
+not recommended.
+
+So Cython is not good together with PyPy which works best with a
+[CFFI](https://cffi.readthedocs.io/) binding. @Duality4Y did an experiment here
+https://github.com/Duality4Y/rgb-matrix-cffi which works well with PyPy and is
+about twice as fast as running Python3+cython (but Python3+cffi is slower than
+Python3+cython, so we can't just replace everything with cffi).
+
+Of course, it would be nice to have the fastest possible binding to all kinds
+of Python interpreters. If anyone wants to work on that, this would certainly
+be a welcome pull request.
+
+Performance
+-----------
+The simplicity of scripting comes at a price: Python is slower than C++ of
+course.
+If you have to do a lot of pixel updates in your demo, this can be too slow
+depending on what you do. Here are some rough numbers for calling `SetPixel()`
+in a tight loop:
+
+  * On a Pi-2 and Pi-3, a Python script will be about 1/8 of the speed compared
+    to the corresponding C++ program (pushing ~0.43 Megapixels/s Python
+    vs. ~3.5 Megapixels/s C++ on a Pi-3 for instance)
+  * On a Pi-1/Pi Zero, the difference is even worse: 1/24 of the speed to the
+    corresponding C++ program. Given that this Pi is already about 1/10 the
+    speed of a Pi-3, this almost makes Python unusable on a Pi-1
+    (~0.015 Megapixels/s Python vs. ~0.36 Megapixels/s C++)
+  * Also interesting: Python3 is a little bit slower than Python2.7.
+    So if you can, stick with Python2.7 for now.
+  * The good news is, that this is due to overhead per function call. If you
+    can do more per function call, then this is less problematic. For instance
+    if you have an image to be displayed with `SetImage()`, that will much
+    faster per pixel (internally this then copies the pixels natively).
+
+The ~0.015 Megapixels/s on a Pi-1 means that you can update a 32x32 matrix
+at most with ~15fps. If you have chained 5, then you barely reach 3fps.
+In a Pi-3, you get about 400fps update rate (85fps for 5-chain) with a Python
+program (while with C++, you can do the same thing with a comfortable 3500fps
+(700fps for 5)). Keep in mind that this is if all you do is just calling
+`SetPixel()`, it does not include any time of what you actually want to do in
+your demo - so anything in addition to that will drop your update rate.
+
+If you can prepare the animation you want to show, then you can either prepare
+images and then use the much faster call to `SetImage()`, or can fill
+entire offscreen-frames (create with `CreateFrameCanvas()`) and then
+swap with `SwapOnVSync()` (this is the fastest method).
+
+Using the library
+-----------------
+
+Be aware of the fact that using the full performance of the RGBMatrix requires root privileges.
+Therefore you should run all you python scripts as using `sudo`.
+
+You may find examples in the [samples/](./samples) subdirectory.
+The examples all use the [samplebase.py](./samples/samplebase.py) that provides
+some basic capabilities to all example programs, such as command-line parsing: all
+sample-programs accept `--led-rows`, `--led-chain` and `--led-parallel` as
+command line options to adapt to your configuration
+
+```bash
+cd samples
+sudo ./runtext.py --led-chain=4
+```
+
+To use different wiring without recompiling the library to change the default,
+you can use `--led-gpio-mapping` (or `-m`). For example, to use Adafruit HAT:
+```bash
+sudo ./runtext.py --led-gpio-mapping=adafruit-hat
+```
+
+Here is a complete example showing how to write an image viewer:
+```python
+#!/usr/bin/env python
+import time
+import sys
+
+from rgbmatrix import RGBMatrix, RGBMatrixOptions
+from PIL import Image
+
+if len(sys.argv) < 2:
+    sys.exit("Require an image argument")
+else:
+    image_file = sys.argv[1]
+
+image = Image.open(image_file)
+
+# Configuration for the matrix
+options = RGBMatrixOptions()
+options.rows = 32
+options.chain_length = 1
+options.parallel = 1
+options.hardware_mapping = 'regular'  # If you have an Adafruit HAT: 'adafruit-hat'
+
+matrix = RGBMatrix(options = options)
+
+# Make image fit our screen.
+image.thumbnail((matrix.width, matrix.height), Image.ANTIALIAS)
+
+matrix.SetImage(image.convert('RGB'))
+
+try:
+    print("Press CTRL-C to stop.")
+    while True:
+        time.sleep(100)
+except KeyboardInterrupt:
+    sys.exit(0)
+```
+
+## API
+
+The source of truth for what is available in the Python bindings may be found [here](rgbmatrix/core.pyx) (RGBMatrix, FrameCanvas, RGBMatrixOptions) and [here](rgbmatrix/graphics.pyx) (graphics).  The underlying implementation's ground truth documentation may be found [here](../../include), specifically for [RGBMatrix, RGBMatrixOptions, and FrameCanvas](../../include/led-matrix.h), [Canvas](../../include/canvas.h) (base class of RGBMatrix), and [graphics methods and Font](../../include/graphics.h).
+
+### User
+
+As noted in the Performance section above, Python programs not run as `root` will not be as high-performance as those run as `root`.  When running as `root`, be aware of a potentially-unexpected behavior: to reduce the security attack surface, initializing an RGBMatrix as `root` changes the user from `root` to `daemon` (see [#1170](https://github.com/hzeller/rpi-rgb-led-matrix/issues/1170) for more information) by default.  This means, for instance, that some file operations possible before initializing the RGBMatrix will not be possible after initialization.  To disable this behavior, set `drop_privileges=False` in RGBMatrixOptions, but be aware that doing so will reduce security.

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/Makefile

@@ -0,0 +1,15 @@
+# The *.cpp files are included in the distribution; this is only needed when
+# working on the pyx files.
+#
+# Please check in modified *.cpp files with distribution to not require cython
+# to be installed on the users' machine.
+# for python3: make PYTHON=$(which python3) CYTHON=$(which cython3)
+CYTHON ?= cython
+
+all : core.cpp graphics.cpp
+
+%.cpp : %.pyx
+	$(CYTHON) --cplus -o $@ $^
+
+clean:
+	rm -rf core.cpp graphics.cpp

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/__init__.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+__version__ = "0.0.1"
+__author__ = "Christoph Friedrich <christoph.friedrich@vonaffenfels.de>"
+
+from .core import RGBMatrix, FrameCanvas, RGBMatrixOptions

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/core.pxd

@@ -0,0 +1,24 @@
+cimport cppinc
+
+cdef class Canvas:
+    cdef cppinc.Canvas *__getCanvas(self) except +
+
+cdef class FrameCanvas(Canvas):
+    cdef cppinc.FrameCanvas *__canvas
+
+cdef class RGBMatrix(Canvas):
+    cdef cppinc.RGBMatrix *__matrix
+
+cdef class RGBMatrixOptions:
+    cdef cppinc.Options __options
+    cdef cppinc.RuntimeOptions __runtime_options
+    # Must keep a reference to the encoded bytes for the strings,
+    # otherwise, when the Options struct is used, it will be garbage collected
+    cdef bytes __py_encoded_hardware_mapping
+    cdef bytes __py_encoded_led_rgb_sequence
+    cdef bytes __py_encoded_pixel_mapper_config
+    cdef bytes __py_encoded_panel_type
+
+# Local Variables:
+# mode: python
+# End:

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/core.pyx

@@ -0,0 +1,272 @@
+# distutils: language = c++
+
+from libcpp cimport bool
+from libc.stdint cimport uint8_t, uint32_t, uintptr_t
+from PIL import Image
+import cython
+
+cdef class Canvas:
+    cdef cppinc.Canvas* __getCanvas(self) except +:
+        raise Exception("Not implemented")
+
+    def SetImage(self, image, int offset_x = 0, int offset_y = 0, unsafe=True):
+        if (image.mode != "RGB"):
+            raise Exception("Currently, only RGB mode is supported for SetImage(). Please create images with mode 'RGB' or convert first with image = image.convert('RGB'). Pull requests to support more modes natively are also welcome :)")
+
+        if unsafe:
+            #In unsafe mode we directly access the underlying PIL image array
+            #in cython, which is considered unsafe pointer accecss,
+            #however it's super fast and seems to work fine
+            #https://groups.google.com/forum/#!topic/cython-users/Dc1ft5W6KM4
+            img_width, img_height = image.size
+            self.SetPixelsPillow(offset_x, offset_y, img_width, img_height, image)
+        else:
+            # First implementation of a SetImage(). OPTIMIZE_ME: A more native
+            # implementation that directly reads the buffer and calls the underlying
+            # C functions can certainly be faster.
+            img_width, img_height = image.size
+            pixels = image.load()
+            for x in range(max(0, -offset_x), min(img_width, self.width - offset_x)):
+                for y in range(max(0, -offset_y), min(img_height, self.height - offset_y)):
+                    (r, g, b) = pixels[x, y]
+                    self.SetPixel(x + offset_x, y + offset_y, r, g, b)
+
+    @cython.boundscheck(False)
+    @cython.wraparound(False)
+    def SetPixelsPillow(self, int xstart, int ystart, int width, int height, image):
+        cdef cppinc.FrameCanvas* my_canvas = <cppinc.FrameCanvas*>self.__getCanvas()
+        cdef int frame_width = my_canvas.width()
+        cdef int frame_height = my_canvas.height()
+        cdef int row, col
+        cdef uint8_t r, g, b
+        cdef uint32_t **image_ptr
+        cdef uint32_t pixel
+        image.load()
+        ptr_tmp = dict(image.im.unsafe_ptrs)['image32']
+        image_ptr = (<uint32_t **>(<uintptr_t>ptr_tmp))
+
+        for col in range(max(0, -xstart), min(width, frame_width - xstart)):
+            for row in range(max(0, -ystart), min(height, frame_height - ystart)):
+                pixel = image_ptr[row][col]
+                r = (pixel ) & 0xFF
+                g = (pixel >> 8) & 0xFF
+                b = (pixel >> 16) & 0xFF
+                my_canvas.SetPixel(xstart+col, ystart+row, r, g, b)
+
+cdef class FrameCanvas(Canvas):
+    def __dealloc__(self):
+        if <void*>self.__canvas != NULL:
+            self.__canvas = NULL
+
+    cdef cppinc.Canvas* __getCanvas(self) except *:
+        if <void*>self.__canvas != NULL:
+            return self.__canvas
+        raise Exception("Canvas was destroyed or not initialized, you cannot use this object anymore")
+
+    def Fill(self, uint8_t red, uint8_t green, uint8_t blue):
+        (<cppinc.FrameCanvas*>self.__getCanvas()).Fill(red, green, blue)
+
+    def Clear(self):
+        (<cppinc.FrameCanvas*>self.__getCanvas()).Clear()
+
+    def SetPixel(self, int x, int y, uint8_t red, uint8_t green, uint8_t blue):
+        (<cppinc.FrameCanvas*>self.__getCanvas()).SetPixel(x, y, red, green, blue)
+
+
+    property width:
+        def __get__(self): return (<cppinc.FrameCanvas*>self.__getCanvas()).width()
+
+    property height:
+        def __get__(self): return (<cppinc.FrameCanvas*>self.__getCanvas()).height()
+
+    property pwmBits:
+        def __get__(self): return (<cppinc.FrameCanvas*>self.__getCanvas()).pwmbits()
+        def __set__(self, pwmBits): (<cppinc.FrameCanvas*>self.__getCanvas()).SetPWMBits(pwmBits)
+
+    property brightness:
+        def __get__(self): return (<cppinc.FrameCanvas*>self.__getCanvas()).brightness()
+        def __set__(self, val): (<cppinc.FrameCanvas*>self.__getCanvas()).SetBrightness(val)
+
+
+cdef class RGBMatrixOptions:
+    def __cinit__(self):
+        self.__options = cppinc.Options()
+        self.__runtime_options = cppinc.RuntimeOptions()
+
+    # RGBMatrix::Options properties
+    property hardware_mapping:
+        def __get__(self): return self.__options.hardware_mapping
+        def __set__(self, value):
+            self.__py_encoded_hardware_mapping = value.encode('utf-8')
+            self.__options.hardware_mapping = self.__py_encoded_hardware_mapping
+
+    property rows:
+        def __get__(self): return self.__options.rows
+        def __set__(self, uint8_t value): self.__options.rows = value
+
+    property cols:
+        def __get__(self): return self.__options.cols
+        def __set__(self, uint32_t value): self.__options.cols = value
+
+    property chain_length:
+        def __get__(self): return self.__options.chain_length
+        def __set__(self, uint8_t value): self.__options.chain_length = value
+
+    property parallel:
+        def __get__(self): return self.__options.parallel
+        def __set__(self, uint8_t value): self.__options.parallel = value
+
+    property pwm_bits:
+        def __get__(self): return self.__options.pwm_bits
+        def __set__(self, uint8_t value): self.__options.pwm_bits = value
+
+    property pwm_lsb_nanoseconds:
+        def __get__(self): return self.__options.pwm_lsb_nanoseconds
+        def __set__(self, uint32_t value): self.__options.pwm_lsb_nanoseconds = value
+
+    property brightness:
+        def __get__(self): return self.__options.brightness
+        def __set__(self, uint8_t value): self.__options.brightness = value
+
+    property scan_mode:
+        def __get__(self): return self.__options.scan_mode
+        def __set__(self, uint8_t value): self.__options.scan_mode = value
+
+    property multiplexing:
+        def __get__(self): return self.__options.multiplexing
+        def __set__(self, uint8_t value): self.__options.multiplexing = value
+
+    property row_address_type:
+        def __get__(self): return self.__options.row_address_type
+        def __set__(self, uint8_t value): self.__options.row_address_type = value
+
+    property disable_hardware_pulsing:
+        def __get__(self): return self.__options.disable_hardware_pulsing
+        def __set__(self, value): self.__options.disable_hardware_pulsing = value
+
+    property show_refresh_rate:
+        def __get__(self): return self.__options.show_refresh_rate
+        def __set__(self, value): self.__options.show_refresh_rate = value
+
+    property inverse_colors:
+        def __get__(self): return self.__options.inverse_colors
+        def __set__(self, value): self.__options.inverse_colors = value
+
+    property led_rgb_sequence:
+        def __get__(self): return self.__options.led_rgb_sequence
+        def __set__(self, value):
+            self.__py_encoded_led_rgb_sequence = value.encode('utf-8')
+            self.__options.led_rgb_sequence = self.__py_encoded_led_rgb_sequence
+
+    property pixel_mapper_config:
+        def __get__(self): return self.__options.pixel_mapper_config
+        def __set__(self, value):
+            self.__py_encoded_pixel_mapper_config = value.encode('utf-8')
+            self.__options.pixel_mapper_config = self.__py_encoded_pixel_mapper_config
+
+    property panel_type:
+        def __get__(self): return self.__options.panel_type
+        def __set__(self, value):
+            self.__py_encoded_panel_type = value.encode('utf-8')
+            self.__options.panel_type = self.__py_encoded_panel_type
+
+    property pwm_dither_bits:
+        def __get__(self): return self.__options.pwm_dither_bits
+        def __set__(self, uint8_t value): self.__options.pwm_dither_bits = value
+
+    property limit_refresh_rate_hz:
+        def __get__(self): return self.__options.limit_refresh_rate_hz
+        def __set__(self, value): self.__options.limit_refresh_rate_hz = value
+
+
+    # RuntimeOptions properties
+
+    property gpio_slowdown:
+        def __get__(self): return self.__runtime_options.gpio_slowdown
+        def __set__(self, uint8_t value): self.__runtime_options.gpio_slowdown = value
+
+    property daemon:
+        def __get__(self): return self.__runtime_options.daemon
+        def __set__(self, uint8_t value): self.__runtime_options.daemon = value
+
+    property drop_privileges:
+        def __get__(self): return self.__runtime_options.drop_privileges
+        def __set__(self, uint8_t value): self.__runtime_options.drop_privileges = value
+
+cdef class RGBMatrix(Canvas):
+    def __cinit__(self, int rows = 0, int chains = 0, int parallel = 0,
+        RGBMatrixOptions options = None):
+
+        # If RGBMatrixOptions not provided, create defaults and set any optional
+        # parameters supplied
+        if options == None:
+            options = RGBMatrixOptions()
+
+        if rows > 0:
+            options.rows = rows
+        if chains > 0:
+            options.chain_length = chains
+        if parallel > 0:
+            options.parallel = parallel
+
+        self.__matrix = cppinc.CreateMatrixFromOptions(options.__options,
+            options.__runtime_options)
+
+    def __dealloc__(self):
+        self.__matrix.Clear()
+        del self.__matrix
+
+    cdef cppinc.Canvas* __getCanvas(self) except *:
+        if <void*>self.__matrix != NULL:
+            return self.__matrix
+        raise Exception("Canvas was destroyed or not initialized, you cannot use this object anymore")
+
+    def Fill(self, uint8_t red, uint8_t green, uint8_t blue):
+        self.__matrix.Fill(red, green, blue)
+
+    def SetPixel(self, int x, int y, uint8_t red, uint8_t green, uint8_t blue):
+        self.__matrix.SetPixel(x, y, red, green, blue)
+
+    def Clear(self):
+        self.__matrix.Clear()
+
+    def CreateFrameCanvas(self):
+        return __createFrameCanvas(self.__matrix.CreateFrameCanvas())
+
+    # The optional "framerate_fraction" parameter allows to choose which
+    # multiple of the global frame-count to use. So it slows down your animation
+    # to an exact integer fraction of the refresh rate.
+    # Default is 1, so immediately next available frame.
+    # (Say you have 140Hz refresh rate, then a value of 5 would give you an
+    # 28Hz animation, nicely locked to the refresh-rate).
+    # If you combine this with RGBMatrixOptions.limit_refresh_rate_hz you can create
+    # time-correct animations.
+    def SwapOnVSync(self, FrameCanvas newFrame, uint8_t framerate_fraction = 1):
+        return __createFrameCanvas(self.__matrix.SwapOnVSync(newFrame.__canvas, framerate_fraction))
+
+    property luminanceCorrect:
+        def __get__(self): return self.__matrix.luminance_correct()
+        def __set__(self, luminanceCorrect): self.__matrix.set_luminance_correct(luminanceCorrect)
+
+    property pwmBits:
+        def __get__(self): return self.__matrix.pwmbits()
+        def __set__(self, pwmBits): self.__matrix.SetPWMBits(pwmBits)
+
+    property brightness:
+        def __get__(self): return self.__matrix.brightness()
+        def __set__(self, brightness): self.__matrix.SetBrightness(brightness)
+
+    property height:
+        def __get__(self): return self.__matrix.height()
+
+    property width:
+        def __get__(self): return self.__matrix.width()
+
+cdef __createFrameCanvas(cppinc.FrameCanvas* newCanvas):
+    canvas = FrameCanvas()
+    canvas.__canvas = newCanvas
+    return canvas
+
+# Local Variables:
+# mode: python
+# End:

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/cppinc.pxd

@@ -0,0 +1,88 @@
+from libcpp cimport bool
+from libc.stdint cimport uint8_t, uint32_t
+
+########################
+### External classes ###
+########################
+
+cdef extern from "canvas.h" namespace "rgb_matrix":
+    cdef cppclass Canvas:
+        int width()
+        int height()
+        void SetPixel(int, int, uint8_t, uint8_t, uint8_t) nogil
+        void Clear() nogil
+        void Fill(uint8_t, uint8_t, uint8_t) nogil
+
+cdef extern from "led-matrix.h" namespace "rgb_matrix":
+    cdef cppclass RGBMatrix(Canvas):
+        bool SetPWMBits(uint8_t)
+        uint8_t pwmbits()
+        void set_luminance_correct(bool)
+        bool luminance_correct()
+        void SetBrightness(uint8_t)
+        uint8_t brightness()
+        FrameCanvas *CreateFrameCanvas()
+        FrameCanvas *SwapOnVSync(FrameCanvas*, uint8_t)
+
+    cdef cppclass FrameCanvas(Canvas):
+        bool SetPWMBits(uint8_t)
+        uint8_t pwmbits()
+        void SetBrightness(uint8_t)
+        uint8_t brightness()
+
+    struct RuntimeOptions:
+      RuntimeOptions() except +
+      int gpio_slowdown
+      int daemon
+      int drop_privileges
+
+
+    RGBMatrix *CreateMatrixFromOptions(Options &options, RuntimeOptions runtime_options)
+
+
+
+cdef extern from "led-matrix.h" namespace "rgb_matrix::RGBMatrix":
+    cdef struct Options:
+        Options() except +
+
+        const char *hardware_mapping
+
+        int rows
+        int cols
+        int chain_length
+        int parallel
+        int pwm_bits
+        int pwm_lsb_nanoseconds
+        int brightness
+        int scan_mode
+        int row_address_type
+        int multiplexing
+        int pwm_dither_bits
+        int limit_refresh_rate_hz
+
+        bool disable_hardware_pulsing
+        bool show_refresh_rate
+        bool inverse_colors
+
+        const char *led_rgb_sequence
+        const char *pixel_mapper_config
+        const char *panel_type
+
+cdef extern from "graphics.h" namespace "rgb_matrix":
+    cdef struct Color:
+        Color(uint8_t, uint8_t, uint8_t) except +
+        uint8_t r
+        uint8_t g
+        uint8_t b
+
+    cdef cppclass Font:
+        Font() except +
+        bool LoadFont(const char*)
+        int height()
+        int baseline()
+        int CharacterWidth(uint32_t)
+        int DrawGlyph(Canvas*, int, int, const Color, uint32_t);
+
+    cdef int DrawText(Canvas*, const Font, int, int, const Color, const char*)
+    cdef void DrawCircle(Canvas*, int, int, int, const Color)
+    cdef void DrawLine(Canvas*, int, int, int, int, const Color)

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/graphics.pxd

@@ -0,0 +1,11 @@
+cimport cppinc
+
+cdef class Color:
+    cdef cppinc.Color __color
+
+cdef class Font:
+    cdef cppinc.Font __font
+
+# Local Variables:
+# mode: python
+# End:

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/graphics.pyx

@@ -0,0 +1,54 @@
+# distutils: language = c++
+
+from libcpp cimport bool
+from libc.stdint cimport uint8_t, uint32_t
+
+cimport core
+
+cdef class Color:
+    def __init__(self, uint8_t red = 0, uint8_t green = 0, uint8_t blue = 0):
+        self.__color.r = red
+        self.__color.g = green
+        self.__color.b = blue
+
+    property red:
+        def __get__(self): return self.__color.r
+        def __set__(self, uint8_t value): self.__color.r = value
+
+    property green:
+        def __get__(self): return self.__color.g
+        def __set__(self, uint8_t value): self.__color.g = value
+
+    property blue:
+        def __get__(self): return self.__color.b
+        def __set__(self, uint8_t value): self.__color.b = value
+
+cdef class Font:
+    def CharacterWidth(self, uint32_t char):
+        return self.__font.CharacterWidth(char)
+
+    def LoadFont(self, file):
+        if (not self.__font.LoadFont(file.encode('utf-8'))):
+            raise Exception("Couldn't load font " + file)
+
+    def DrawGlyph(self, core.Canvas c, int x, int y, Color color, uint32_t char):
+        return self.__font.DrawGlyph(c.__getCanvas(), x, y, color.__color, char)
+
+    property height:
+        def __get__(self): return self.__font.height()
+
+    property baseline:
+        def __get__(self): return self.__font.baseline()
+
+def DrawText(core.Canvas c, Font f, int x, int y, Color color, text):
+    return cppinc.DrawText(c.__getCanvas(), f.__font, x, y, color.__color, text.encode('utf-8'))
+
+def DrawCircle(core.Canvas c, int x, int y, int r, Color color):
+    cppinc.DrawCircle(c.__getCanvas(), x, y, r, color.__color)
+
+def DrawLine(core.Canvas c, int x1, int y1, int x2, int y2, Color color):
+    cppinc.DrawLine(c.__getCanvas(), x1, y1, x2, y2, color.__color)
+
+# Local Variables:
+# mode: python
+# End:

depends/rpi-rgb-led-matrix/bindings/python/samples/gif-viewer.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+import time
+import sys
+
+from rgbmatrix import RGBMatrix, RGBMatrixOptions
+from PIL import Image
+
+
+if len(sys.argv) < 2:
+    sys.exit("Require a gif argument")
+else:
+    image_file = sys.argv[1]
+
+gif = Image.open(image_file)
+
+try:
+    num_frames = gif.n_frames
+except Exception:
+    sys.exit("provided image is not a gif")
+
+
+# Configuration for the matrix
+options = RGBMatrixOptions()
+options.rows = 32
+options.cols = 32
+options.chain_length = 1
+options.parallel = 1
+options.hardware_mapping = 'regular'  # If you have an Adafruit HAT: 'adafruit-hat'
+
+matrix = RGBMatrix(options = options)
+
+# Preprocess the gifs frames into canvases to improve playback performance
+canvases = []
+print("Preprocessing gif, this may take a moment depending on the size of the gif...")
+for frame_index in range(0, num_frames):
+    gif.seek(frame_index)
+    # must copy the frame out of the gif, since thumbnail() modifies the image in-place
+    frame = gif.copy()
+    frame.thumbnail((matrix.width, matrix.height), Image.ANTIALIAS)
+    canvas = matrix.CreateFrameCanvas()
+    canvas.SetImage(frame.convert("RGB"))
+    canvases.append(canvas)
+# Close the gif file to save memory now that we have copied out all of the frames
+gif.close()
+
+print("Completed Preprocessing, displaying gif")
+
+try:
+    print("Press CTRL-C to stop.")
+
+    # Infinitely loop through the gif
+    cur_frame = 0
+    while(True):
+        matrix.SwapOnVSync(canvases[cur_frame], framerate_fraction=10)
+        if cur_frame == num_frames - 1:
+            cur_frame = 0
+        else:
+            cur_frame += 1
+except KeyboardInterrupt:
+    sys.exit(0)

depends/rpi-rgb-led-matrix/bindings/python/samples/graphics.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+from rgbmatrix import graphics
+import time
+
+
+class GraphicsTest(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(GraphicsTest, self).__init__(*args, **kwargs)
+
+    def run(self):
+        canvas = self.matrix
+        font = graphics.Font()
+        font.LoadFont("../../../fonts/7x13.bdf")
+
+        red = graphics.Color(255, 0, 0)
+        graphics.DrawLine(canvas, 5, 5, 22, 13, red)
+
+        green = graphics.Color(0, 255, 0)
+        graphics.DrawCircle(canvas, 15, 15, 10, green)
+
+        blue = graphics.Color(0, 0, 255)
+        graphics.DrawText(canvas, font, 2, 10, blue, "Text")
+
+        time.sleep(10)   # show display for 10 seconds before exit
+
+
+# Main function
+if __name__ == "__main__":
+    graphics_test = GraphicsTest()
+    if (not graphics_test.process()):
+        graphics_test.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/grayscale-block.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+import time
+
+
+class GrayscaleBlock(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(GrayscaleBlock, self).__init__(*args, **kwargs)
+
+    def run(self):
+        sub_blocks = 16
+        width = self.matrix.width
+        height = self.matrix.height
+        x_step = max(1, width / sub_blocks)
+        y_step = max(1, height / sub_blocks)
+        count = 0
+
+        while True:
+            for y in range(0, height):
+                for x in range(0, width):
+                    c = sub_blocks * int(y / y_step) + int(x / x_step)
+                    if count % 4 == 0:
+                        self.matrix.SetPixel(x, y, c, c, c)
+                    elif count % 4 == 1:
+                        self.matrix.SetPixel(x, y, c, 0, 0)
+                    elif count % 4 == 2:
+                        self.matrix.SetPixel(x, y, 0, c, 0)
+                    elif count % 4 == 3:
+                        self.matrix.SetPixel(x, y, 0, 0, c)
+
+            count += 1
+            time.sleep(2)
+
+
+# Main function
+if __name__ == "__main__":
+    grayscale_block = GrayscaleBlock()
+    if (not grayscale_block.process()):
+        grayscale_block.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/image-draw.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+# (This is an example similar to an example from the Adafruit fork
+#  to show the similarities. Most important difference currently is, that
+#  this library wants RGB mode.)
+#
+# A more complex RGBMatrix example works with the Python Imaging Library,
+# demonstrating a few graphics primitives and image loading.
+# Note that PIL graphics do not have an immediate effect on the display --
+# image is drawn into a separate buffer, which is then copied to the matrix
+# using the SetImage() function (see examples below).
+# Requires rgbmatrix.so present in the same directory.
+
+# PIL Image module (create or load images) is explained here:
+# http://effbot.org/imagingbook/image.htm
+# PIL ImageDraw module (draw shapes to images) explained here:
+# http://effbot.org/imagingbook/imagedraw.htm
+
+from PIL import Image
+from PIL import ImageDraw
+import time
+from rgbmatrix import RGBMatrix, RGBMatrixOptions
+
+# Configuration for the matrix
+options = RGBMatrixOptions()
+options.rows = 32
+options.chain_length = 1
+options.parallel = 1
+options.hardware_mapping = 'regular'  # If you have an Adafruit HAT: 'adafruit-hat'
+
+matrix = RGBMatrix(options = options)
+
+# RGB example w/graphics prims.
+# Note, only "RGB" mode is supported currently.
+image = Image.new("RGB", (32, 32))  # Can be larger than matrix if wanted!!
+draw = ImageDraw.Draw(image)  # Declare Draw instance before prims
+# Draw some shapes into image (no immediate effect on matrix)...
+draw.rectangle((0, 0, 31, 31), fill=(0, 0, 0), outline=(0, 0, 255))
+draw.line((0, 0, 31, 31), fill=(255, 0, 0))
+draw.line((0, 31, 31, 0), fill=(0, 255, 0))
+
+# Then scroll image across matrix...
+for n in range(-32, 33):  # Start off top-left, move off bottom-right
+    matrix.Clear()
+    matrix.SetImage(image, n, n)
+    time.sleep(0.05)
+
+matrix.Clear()

depends/rpi-rgb-led-matrix/bindings/python/samples/image-scroller.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+import time
+from samplebase import SampleBase
+from PIL import Image
+
+
+class ImageScroller(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(ImageScroller, self).__init__(*args, **kwargs)
+        self.parser.add_argument("-i", "--image", help="The image to display", default="../../../examples-api-use/runtext.ppm")
+
+    def run(self):
+        if not 'image' in self.__dict__:
+            self.image = Image.open(self.args.image).convert('RGB')
+        self.image.resize((self.matrix.width, self.matrix.height), Image.ANTIALIAS)
+
+        double_buffer = self.matrix.CreateFrameCanvas()
+        img_width, img_height = self.image.size
+
+        # let's scroll
+        xpos = 0
+        while True:
+            xpos += 1
+            if (xpos > img_width):
+                xpos = 0
+
+            double_buffer.SetImage(self.image, -xpos)
+            double_buffer.SetImage(self.image, -xpos + img_width)
+
+            double_buffer = self.matrix.SwapOnVSync(double_buffer)
+            time.sleep(0.01)
+
+# Main function
+# e.g. call with
+#  sudo ./image-scroller.py --chain=4
+# if you have a chain of four
+if __name__ == "__main__":
+    image_scroller = ImageScroller()
+    if (not image_scroller.process()):
+        image_scroller.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/image-viewer.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+import time
+import sys
+
+from rgbmatrix import RGBMatrix, RGBMatrixOptions
+from PIL import Image
+
+if len(sys.argv) < 2:
+    sys.exit("Require an image argument")
+else:
+    image_file = sys.argv[1]
+
+image = Image.open(image_file)
+
+# Configuration for the matrix
+options = RGBMatrixOptions()
+options.rows = 32
+options.chain_length = 1
+options.parallel = 1
+options.hardware_mapping = 'regular'  # If you have an Adafruit HAT: 'adafruit-hat'
+
+matrix = RGBMatrix(options = options)
+
+# Make image fit our screen.
+image.thumbnail((matrix.width, matrix.height), Image.ANTIALIAS)
+
+matrix.SetImage(image.convert('RGB'))
+
+try:
+    print("Press CTRL-C to stop.")
+    while True:
+        time.sleep(100)
+except KeyboardInterrupt:
+    sys.exit(0)

depends/rpi-rgb-led-matrix/bindings/python/samples/pulsing-brightness.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+
+
+class GrayscaleBlock(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(GrayscaleBlock, self).__init__(*args, **kwargs)
+
+    def run(self):
+        max_brightness = self.matrix.brightness
+        count = 0
+        c = 255
+
+        while (True):
+            if self.matrix.brightness < 1:
+                self.matrix.brightness = max_brightness
+                count += 1
+            else:
+                self.matrix.brightness -= 1
+
+            if count % 4 == 0:
+                self.matrix.Fill(c, 0, 0)
+            elif count % 4 == 1:
+                self.matrix.Fill(0, c, 0)
+            elif count % 4 == 2:
+                self.matrix.Fill(0, 0, c)
+            elif count % 4 == 3:
+                self.matrix.Fill(c, c, c)
+
+            self.usleep(20 * 1000)
+
+# Main function
+if __name__ == "__main__":
+    grayscale_block = GrayscaleBlock()
+    if (not grayscale_block.process()):
+        grayscale_block.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/pulsing-colors.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+
+
+class PulsingColors(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(PulsingColors, self).__init__(*args, **kwargs)
+
+    def run(self):
+        self.offscreen_canvas = self.matrix.CreateFrameCanvas()
+        continuum = 0
+
+        while True:
+            self.usleep(5 * 1000)
+            continuum += 1
+            continuum %= 3 * 255
+
+            red = 0
+            green = 0
+            blue = 0
+
+            if continuum <= 255:
+                c = continuum
+                blue = 255 - c
+                red = c
+            elif continuum > 255 and continuum <= 511:
+                c = continuum - 256
+                red = 255 - c
+                green = c
+            else:
+                c = continuum - 512
+                green = 255 - c
+                blue = c
+
+            self.offscreen_canvas.Fill(red, green, blue)
+            self.offscreen_canvas = self.matrix.SwapOnVSync(self.offscreen_canvas)
+
+# Main function
+if __name__ == "__main__":
+    pulsing_colors = PulsingColors()
+    if (not pulsing_colors.process()):
+        pulsing_colors.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/rotating-block-generator.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+import math
+
+
+def scale_col(val, lo, hi):
+    if val < lo:
+        return 0
+    if val > hi:
+        return 255
+    return 255 * (val - lo) / (hi - lo)
+
+
+def rotate(x, y, sin, cos):
+    return x * cos - y * sin, x * sin + y * cos
+
+
+class RotatingBlockGenerator(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(RotatingBlockGenerator, self).__init__(*args, **kwargs)
+
+    def run(self):
+        cent_x = self.matrix.width / 2
+        cent_y = self.matrix.height / 2
+
+        rotate_square = min(self.matrix.width, self.matrix.height) * 1.41
+        min_rotate = cent_x - rotate_square / 2
+        max_rotate = cent_x + rotate_square / 2
+
+        display_square = min(self.matrix.width, self.matrix.height) * 0.7
+        min_display = cent_x - display_square / 2
+        max_display = cent_x + display_square / 2
+
+        deg_to_rad = 2 * 3.14159265 / 360
+        rotation = 0
+
+        # Pre calculate colors
+        col_table = []
+        for x in range(int(min_rotate), int(max_rotate)):
+            col_table.insert(x, scale_col(x, min_display, max_display))
+
+        offset_canvas = self.matrix.CreateFrameCanvas()
+
+        while True:
+            rotation += 1
+            rotation %= 360
+
+            # calculate sin and cos once for each frame
+            angle = rotation * deg_to_rad
+            sin = math.sin(angle)
+            cos = math.cos(angle)
+
+            for x in range(int(min_rotate), int(max_rotate)):
+                for y in range(int(min_rotate), int(max_rotate)):
+                    # Our rotate center is always offset by cent_x
+                    rot_x, rot_y = rotate(x - cent_x, y - cent_x, sin, cos)
+
+                    if x >= min_display and x < max_display and y >= min_display and y < max_display:
+                        x_col = col_table[x]
+                        y_col = col_table[y]
+                        offset_canvas.SetPixel(rot_x + cent_x, rot_y + cent_y, x_col, 255 - y_col, y_col)
+                    else:
+                        offset_canvas.SetPixel(rot_x + cent_x, rot_y + cent_y, 0, 0, 0)
+
+            offset_canvas = self.matrix.SwapOnVSync(offset_canvas)
+
+
+# Main function
+if __name__ == "__main__":
+    rotating_block_generator = RotatingBlockGenerator()
+    if (not rotating_block_generator.process()):
+        rotating_block_generator.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/runtext.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+# Display a runtext with double-buffering.
+from samplebase import SampleBase
+from rgbmatrix import graphics
+import time
+
+
+class RunText(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(RunText, self).__init__(*args, **kwargs)
+        self.parser.add_argument("-t", "--text", help="The text to scroll on the RGB LED panel", default="Hello world!")
+
+    def run(self):
+        offscreen_canvas = self.matrix.CreateFrameCanvas()
+        font = graphics.Font()
+        font.LoadFont("../../../fonts/7x13.bdf")
+        textColor = graphics.Color(255, 255, 0)
+        pos = offscreen_canvas.width
+        my_text = self.args.text
+
+        while True:
+            offscreen_canvas.Clear()
+            len = graphics.DrawText(offscreen_canvas, font, pos, 10, textColor, my_text)
+            pos -= 1
+            if (pos + len < 0):
+                pos = offscreen_canvas.width
+
+            time.sleep(0.05)
+            offscreen_canvas = self.matrix.SwapOnVSync(offscreen_canvas)
+
+
+# Main function
+if __name__ == "__main__":
+    run_text = RunText()
+    if (not run_text.process()):
+        run_text.print_help()

depends/rpi-rgb-led-matrix/bindings/python/samples/samplebase.py

@@ -0,0 +1,81 @@
+import argparse
+import time
+import sys
+import os
+
+sys.path.append(os.path.abspath(os.path.dirname(__file__) + '/..'))
+from rgbmatrix import RGBMatrix, RGBMatrixOptions
+
+
+class SampleBase(object):
+    def __init__(self, *args, **kwargs):
+        self.parser = argparse.ArgumentParser()
+
+        self.parser.add_argument("-r", "--led-rows", action="store", help="Display rows. 16 for 16x32, 32 for 32x32. Default: 32", default=32, type=int)
+        self.parser.add_argument("--led-cols", action="store", help="Panel columns. Typically 32 or 64. (Default: 32)", default=32, type=int)
+        self.parser.add_argument("-c", "--led-chain", action="store", help="Daisy-chained boards. Default: 1.", default=1, type=int)
+        self.parser.add_argument("-P", "--led-parallel", action="store", help="For Plus-models or RPi2: parallel chains. 1..3. Default: 1", default=1, type=int)
+        self.parser.add_argument("-p", "--led-pwm-bits", action="store", help="Bits used for PWM. Something between 1..11. Default: 11", default=11, type=int)
+        self.parser.add_argument("-b", "--led-brightness", action="store", help="Sets brightness level. Default: 100. Range: 1..100", default=100, type=int)
+        self.parser.add_argument("-m", "--led-gpio-mapping", help="Hardware Mapping: regular, adafruit-hat, adafruit-hat-pwm" , choices=['regular', 'regular-pi1', 'adafruit-hat', 'adafruit-hat-pwm'], type=str)
+        self.parser.add_argument("--led-scan-mode", action="store", help="Progressive or interlaced scan. 0 Progressive, 1 Interlaced (default)", default=1, choices=range(2), type=int)
+        self.parser.add_argument("--led-pwm-lsb-nanoseconds", action="store", help="Base time-unit for the on-time in the lowest significant bit in nanoseconds. Default: 130", default=130, type=int)
+        self.parser.add_argument("--led-show-refresh", action="store_true", help="Shows the current refresh rate of the LED panel")
+        self.parser.add_argument("--led-slowdown-gpio", action="store", help="Slow down writing to GPIO. Range: 0..4. Default: 1", default=1, type=int)
+        self.parser.add_argument("--led-no-hardware-pulse", action="store", help="Don't use hardware pin-pulse generation")
+        self.parser.add_argument("--led-rgb-sequence", action="store", help="Switch if your matrix has led colors swapped. Default: RGB", default="RGB", type=str)
+        self.parser.add_argument("--led-pixel-mapper", action="store", help="Apply pixel mappers. e.g \"Rotate:90\"", default="", type=str)
+        self.parser.add_argument("--led-row-addr-type", action="store", help="0 = default; 1=AB-addressed panels; 2=row direct; 3=ABC-addressed panels; 4 = ABC Shift + DE direct", default=0, type=int, choices=[0,1,2,3,4])
+        self.parser.add_argument("--led-multiplexing", action="store", help="Multiplexing type: 0=direct; 1=strip; 2=checker; 3=spiral; 4=ZStripe; 5=ZnMirrorZStripe; 6=coreman; 7=Kaler2Scan; 8=ZStripeUneven... (Default: 0)", default=0, type=int)
+        self.parser.add_argument("--led-panel-type", action="store", help="Needed to initialize special panels. Supported: 'FM6126A'", default="", type=str)
+        self.parser.add_argument("--led-no-drop-privs", dest="drop_privileges", help="Don't drop privileges from 'root' after initializing the hardware.", action='store_false')
+        self.parser.set_defaults(drop_privileges=True)
+
+    def usleep(self, value):
+        time.sleep(value / 1000000.0)
+
+    def run(self):
+        print("Running")
+
+    def process(self):
+        self.args = self.parser.parse_args()
+
+        options = RGBMatrixOptions()
+
+        if self.args.led_gpio_mapping != None:
+          options.hardware_mapping = self.args.led_gpio_mapping
+        options.rows = self.args.led_rows
+        options.cols = self.args.led_cols
+        options.chain_length = self.args.led_chain
+        options.parallel = self.args.led_parallel
+        options.row_address_type = self.args.led_row_addr_type
+        options.multiplexing = self.args.led_multiplexing
+        options.pwm_bits = self.args.led_pwm_bits
+        options.brightness = self.args.led_brightness
+        options.pwm_lsb_nanoseconds = self.args.led_pwm_lsb_nanoseconds
+        options.led_rgb_sequence = self.args.led_rgb_sequence
+        options.pixel_mapper_config = self.args.led_pixel_mapper
+        options.panel_type = self.args.led_panel_type
+
+
+        if self.args.led_show_refresh:
+          options.show_refresh_rate = 1
+
+        if self.args.led_slowdown_gpio != None:
+            options.gpio_slowdown = self.args.led_slowdown_gpio
+        if self.args.led_no_hardware_pulse:
+          options.disable_hardware_pulsing = True
+        if not self.args.drop_privileges:
+          options.drop_privileges=False
+
+        self.matrix = RGBMatrix(options = options)
+
+        try:
+            # Start loop
+            print("Press CTRL-C to stop sample")
+            self.run()
+        except KeyboardInterrupt:
+            print("Exiting\n")
+            sys.exit(0)
+
+        return True

depends/rpi-rgb-led-matrix/bindings/python/samples/simple-square.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+from samplebase import SampleBase
+
+
+class SimpleSquare(SampleBase):
+    def __init__(self, *args, **kwargs):
+        super(SimpleSquare, self).__init__(*args, **kwargs)
+
+    def run(self):
+        offset_canvas = self.matrix.CreateFrameCanvas()
+        while True:
+            for x in range(0, self.matrix.width):
+                offset_canvas.SetPixel(x, x, 255, 255, 255)
+                offset_canvas.SetPixel(offset_canvas.height - 1 - x, x, 255, 0, 255)
+
+            for x in range(0, offset_canvas.width):
+                offset_canvas.SetPixel(x, 0, 255, 0, 0)
+                offset_canvas.SetPixel(x, offset_canvas.height - 1, 255, 255, 0)
+
+            for y in range(0, offset_canvas.height):
+                offset_canvas.SetPixel(0, y, 0, 0, 255)
+                offset_canvas.SetPixel(offset_canvas.width - 1, y, 0, 255, 0)
+            offset_canvas = self.matrix.SwapOnVSync(offset_canvas)
+
+
+# Main function
+if __name__ == "__main__":
+    simple_square = SimpleSquare()
+    if (not simple_square.process()):
+        simple_square.print_help()

depends/rpi-rgb-led-matrix/bindings/python/setup.py

@@ -0,0 +1,33 @@
+#!/usr/bin/python
+from distutils.core import setup, Extension
+
+core_ext = Extension(
+    name                = 'core',
+    sources             = ['rgbmatrix/core.cpp'],
+    include_dirs        = ['../../include'],
+    library_dirs        = ['../../lib'],
+    libraries           = ['rgbmatrix'],
+    extra_compile_args  = ["-O3", "-Wall"],
+    language            = 'c++'
+)
+
+graphics_ext = Extension(
+    name                = 'graphics',
+    sources             = ['rgbmatrix/graphics.cpp'],
+    include_dirs        = ['../../include'],
+    library_dirs        = ['../../lib'],
+    libraries           = ['rgbmatrix'],
+    extra_compile_args  = ["-O3", "-Wall"],
+    language            = 'c++'
+)
+
+setup(
+    name                = 'rgbmatrix',
+    version             = '0.0.1',
+    author              = 'Christoph Friedrich',
+    author_email        = 'christoph.friedrich@vonaffenfels.de',
+    classifiers         = ['Development Status :: 3 - Alpha'],
+    ext_package         = 'rgbmatrix',
+    ext_modules         = [core_ext, graphics_ext],
+    packages            = ['rgbmatrix']
+)

depends/rpi-rgb-led-matrix/examples-api-use/.gitignore

@@ -0,0 +1,7 @@
+demo
+minimal-example
+text-example
+c-example
+clock
+scrolling-text-example
+ledcat

depends/rpi-rgb-led-matrix/examples-api-use/Makefile

@@ -0,0 +1,60 @@
+CFLAGS=-Wall -O3 -g -Wextra -Wno-unused-parameter
+CXXFLAGS=$(CFLAGS)
+OBJECTS=demo-main.o minimal-example.o c-example.o text-example.o scrolling-text-example.o clock.o ledcat.o input-example.o pixel-mover.o
+BINARIES=demo minimal-example c-example text-example scrolling-text-example clock ledcat input-example pixel-mover
+
+# Where our library resides. You mostly only need to change the
+# RGB_LIB_DISTRIBUTION, this is where the library is checked out.
+RGB_LIB_DISTRIBUTION=..
+RGB_INCDIR=$(RGB_LIB_DISTRIBUTION)/include
+RGB_LIBDIR=$(RGB_LIB_DISTRIBUTION)/lib
+RGB_LIBRARY_NAME=rgbmatrix
+RGB_LIBRARY=$(RGB_LIBDIR)/lib$(RGB_LIBRARY_NAME).a
+LDFLAGS+=-L$(RGB_LIBDIR) -l$(RGB_LIBRARY_NAME) -lrt -lm -lpthread
+
+# To compile image-example
+MAGICK_CXXFLAGS?=$(shell GraphicsMagick++-config --cppflags --cxxflags)
+MAGICK_LDFLAGS?=$(shell GraphicsMagick++-config --ldflags --libs)
+
+all : $(BINARIES)
+
+$(RGB_LIBRARY): FORCE
+	$(MAKE) -C $(RGB_LIBDIR)
+
+demo : demo-main.o $(RGB_LIBRARY)
+	$(CXX) $< -o $@ $(LDFLAGS)
+
+minimal-example : minimal-example.o
+input-example : input-example.o
+text-example: text-example.o
+scrolling-text-example : scrolling-text-example.o
+clock : clock.o
+ledcat : ledcat.o
+pixel-mover : pixel-mover.o
+
+# All the binaries that have the same name as the object file.q
+% : %.o $(RGB_LIBRARY)
+	$(CXX) $< -o $@ $(LDFLAGS)
+
+image-example.o : image-example.cc
+	$(CXX) -I$(RGB_INCDIR) $(CXXFLAGS) $(MAGICK_CXXFLAGS) -c -o $@ $<
+
+image-example: image-example.o $(RGB_LIBRARY)
+	$(CXX) $< -o $@ $(LDFLAGS) $(MAGICK_LDFLAGS)
+
+# Since the C example uses the C++ library underneath, which depends on C++
+# runtime stuff, you still have to also link -lstdc++
+c-example : c-example.o $(RGB_LIBRARY)
+	$(CC) $< -o $@ $(LDFLAGS) -lstdc++
+
+%.o : %.cc
+	$(CXX) -I$(RGB_INCDIR) $(CXXFLAGS) -c -o $@ $<
+
+%.o : %.c
+	$(CC) -I$(RGB_INCDIR) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f $(OBJECTS) $(BINARIES)
+
+FORCE:
+.PHONY: FORCE

depends/rpi-rgb-led-matrix/examples-api-use/README.md

@@ -0,0 +1,461 @@
+Running some demos
+------------------
+Let's start by running some demos, then we can dive into code. The
+[demo-main.cc](demo-main.cc) has some testing demos. Via command line flags,
+you can choose the display type you have (16x32 or 32x32), and how many you
+have chained and paralleled. For detailed description of these flags see the
+[main README section](../README.md#changing-parameters-via-command-line-flags)
+about it.
+
+```
+$ make
+$ sudo ./demo
+usage: ./demo <options> -D <demo-nr> [optional parameter]
+Options:
+        -D <demo-nr>              : Always needs to be set
+        --led-gpio-mapping=<name> : Name of GPIO mapping used. Default "regular"
+        --led-rows=<rows>         : Panel rows. Typically 8, 16, 32 or 64. (Default: 32).
+        --led-cols=<cols>         : Panel columns. Typically 32 or 64. (Default: 32).
+        --led-chain=<chained>     : Number of daisy-chained panels. (Default: 1).
+        --led-parallel=<parallel> : Parallel chains. range=1..3 (Default: 1).
+        --led-multiplexing=<0..17> : Mux type: 0=direct; 1=Stripe; 2=Checkered; 3=Spiral; 4=ZStripe; 5=ZnMirrorZStripe; 6=coreman; 7=Kaler2Scan; 8=ZStripeUneven; 9=P10-128x4-Z; 10=QiangLiQ8; 11=InversedZStripe; 12=P10Outdoor1R1G1-1; 13=P10Outdoor1R1G1-2; 14=P10Outdoor1R1G1-3; 15=P10CoremanMapper; 16=P8Outdoor1R1G1; 17=FlippedStripe (Default: 0)
+        --led-pixel-mapper        : Semicolon-separated list of pixel-mappers to arrange pixels.
+                                    Optional params after a colon e.g. "U-mapper;Rotate:90"
+                                    Available: "Mirror", "Rotate", "U-mapper", "V-mapper". Default: ""
+        --led-pwm-bits=<1..11>    : PWM bits (Default: 11).
+        --led-brightness=<percent>: Brightness in percent (Default: 100).
+        --led-scan-mode=<0..1>    : 0 = progressive; 1 = interlaced (Default: 0).
+        --led-row-addr-type=<0..4>: 0 = default; 1 = AB-addressed panels; 2 = direct row select; 3 = ABC-addressed panels; 4 = ABC Shift + DE direct (Default: 0).
+        --led-show-refresh        : Show refresh rate.
+        --led-limit-refresh=<Hz>  : Limit refresh rate to this frequency in Hz. Useful to keep a
+                                    constant refresh rate on loaded system. 0=no limit. Default: 0
+        --led-inverse             : Switch if your matrix has inverse colors on.
+        --led-rgb-sequence        : Switch if your matrix has led colors swapped (Default: "RGB")
+        --led-pwm-lsb-nanoseconds : PWM Nanoseconds for LSB (Default: 130)
+        --led-pwm-dither-bits=<0..2> : Time dithering of lower bits (Default: 0)
+        --led-no-hardware-pulse   : Don't use hardware pin-pulse generation.
+        --led-panel-type=<name>   : Needed to initialize special panels. Supported: 'FM6126A', 'FM6127'
+        --led-slowdown-gpio=<0..4>: Slowdown GPIO. Needed for faster Pis/slower panels (Default: 1).
+        --led-daemon              : Make the process run in the background as daemon.
+        --led-no-drop-privs       : Don't drop privileges from 'root' after initializing the hardware.
+Demos, choosen with -D
+        0  - some rotating square
+        1  - forward scrolling an image (-m <scroll-ms>)
+        2  - backward scrolling an image (-m <scroll-ms>)
+        3  - test image: a square
+        4  - Pulsing color
+        5  - Grayscale Block
+        6  - Abelian sandpile model (-m <time-step-ms>)
+        7  - Conway's game of life (-m <time-step-ms>)
+        8  - Langton's ant (-m <time-step-ms>)
+        9  - Volume bars (-m <time-step-ms>)
+        10 - Evolution of color (-m <time-step-ms>)
+        11 - Brightness pulse generator
+Example:
+        ./demo -D 1 runtext.ppm
+Scrolls the runtext until Ctrl-C is pressed
+```
+
+To run the actual demos, you need to run this as root so that the
+GPIO pins can be accessed; as soon as that established, the program will drop
+the privileges.
+
+Here is how demo '1' looks. It requires a ppm (type raw) with a height of
+32 pixel - it is infinitely scrolled over the screen; for
+convenience, there is a little runtext.ppm example included:
+
+     $ sudo ./demo -D 1 runtext.ppm
+
+Here is a video of how it looks
+[![Runtext][run-vid]](http://youtu.be/OJvEWyvO4ro)
+
+Other Examples
+--------------
+
+There are a few other examples that you can use as starting point for your
+own exploration of the API. If you just type `make` in this directory, the
+Makefile will build all of these, so they are ready to use. Some examples
+need BDF fonts, of which there are a few provided in [../fonts](../fonts).
+
+Some of these example programs are described in more detail further down this
+page.
+
+ * [minimal-example](./minimal-example.cc) Good to get started with the API
+ * [image-example](./image-example.cc) How to show an image (requires to install the graphics magic library, see in the header of that demo)
+ * [text-example](./text-example.cc) Reads text from stdin and displays it.
+ * [scrolling-text-example](./scrolling-text-example.cc) Scrolls a text
+   given on the command-line.
+ * [clock](./clock.cc) Shows a clock with choosable date format string in
+   one or multiple lines.
+ * [input-example](./input-example.cc) Example how to use the LED-Matrix but
+   also read inputs from free GPIO-pins. Needed if you build some interactive
+   piece.
+ * [ledcat](./ledcat.cc) LED-cat compatible reading of pixels from stdin.
+ * [pixel-mover](./pixel-mover.cc) Displays pixel on the display
+   and it's expected position on the terminal. Helpful for testing panels and
+   figuring out new multiplexing mappings.
+   Shows single dot or leaves a trail with length passed with `-t` option
+   (think of 'snake').
+   Can move around the pixel with W=Up, S=Down, A=Left, D=Right keys.
+
+Using the API
+-------------
+While there is the demo program and the [utilities](../utils), this code can
+be used independently as a library to be used in your own programs.
+The includes are in `include/`, the library to link is built
+in `lib/`. This is a C++ also with C bindings. There is also a
+[Python](../bindings/python) and [c#](../bindings/c%23) bindings.
+
+Getting started
+---------------
+The relevant part to start with is to look at
+[led-matrix.h](../include/led-matrix.h).
+
+You can would typically use the `RGBMatrix::CreateFromFlags()` factory to
+create an RGBMatrix and then go from there.
+
+```C++
+#include "led-matrix.h"
+
+using rgb_matrix::RGBMatrix;
+
+int main(int argc, char **argv) {
+  // Set some defaults
+  RGBMatrix::Options my_defaults;
+  my_defaults.hardware_mapping = "regular";  // or e.g. "adafruit-hat" or "adafruit-hat-pwm"
+  my_defaults.chain_length = 3;
+  my_defaults.show_refresh_rate = true;
+  rgb_matrix::RuntimeOptions runtime_defaults;
+  // If you drop privileges, the root user you start the program with
+  // to be able to initialize the hardware will be switched to an unprivileged
+  // user to minimize a potential security attack surface.
+  runtime_defaults.drop_privileges = 1;
+  RGBMatrix *matrix = RGBMatrix::CreateFromFlags(&argc, &argv,
+                                                 &my_defaults,
+                                                 &runtime_defaults);
+  if (matrix == NULL) {
+    PrintMatrixFlags(stderr, my_defaults, runtime_defaults);
+    return 1;
+  }
+
+  // matrix->ApplyPixelMapper(...);  // Optional
+
+  // Do your own command line handling with the remaining options.
+
+  //  .. now use matrix
+
+  delete matrix;   // Make sure to delete it in the end.
+}
+```
+
+The `RGBMatrix` is essentially a canvas, it provides some basic functionality
+such as `SetPixel()`, `Fill()` or `Clear()`. If you want to do more, you
+might be interested in functions provided in the
+[graphics.h](../include/graphics.h) header.
+
+If you have animations, you might be interested in double-buffering. There is
+a way to create new canvases with `CreateFrameCanvas()`, and then use
+`SwapOnVSync()` to change the content atomically. See API documentation for
+details.
+
+Start with the [minimal-example.cc](./minimal-example.cc) to start.
+
+If you are interested in drawing text and the font drawing functions in
+graphics.h, have a look at the [text example](./text-example.cc):
+
+```
+sudo ./text-example -f ../fonts/8x13.bdf
+hello
+```
+
+<img src="../img/text-no-ghosting.jpg" height="100px">
+
+How about a clock ?
+
+```
+sudo ./clock -f ../fonts/7x13.bdf --led-chain=2 -d "%A" -d "%H:%M:%S"
+```
+<img src="../img/time-display.jpg" height="100px">
+
+Fonts are in a human readable and editbable `*.bdf` format. There are some
+public domain fonts available in the [`../fonts/`](../fonts) directory. Any
+other fonts you might want to use or scale to the size you need can be
+converted to a BDF format (either with a font editor or the [otf2bdf] tool).
+
+Here is an example how you could create a 30pixel high BDF font from some
+TrueType font:
+
+```bash
+otf2bdf -v -o myfont.bdf -r 72 -p 30 /path/to/font-Bold.ttf
+```
+
+Integrating in your own application
+-----------------------------------
+Until this library shows up in your favorite Linux distribution, you can just
+include the library via github; it is pretty easy to be up-to-date.
+
+I suggest to add this code as a sub-module in your git repository. That way
+you can use that particular version and easily update it if there are changes:
+
+     git submodule add https://github.com/hzeller/rpi-rgb-led-matrix.git matrix
+
+(Read more about how to use [submodules in git][git-submodules])
+
+This will check out the repository in a subdirectory `matrix/`.
+The library to build would be in directory `matrix/lib`, so let's hook that
+into your toplevel Makefile.
+I suggest to set up some variables like this; you only need to change the
+location `RGB_LIB_DISTRIBUTION` is pointing to; in the sub-module example, this
+was the `matrix` directory:
+
+     RGB_LIB_DISTRIBUTION=matrix
+     RGB_INCDIR=$(RGB_LIB_DISTRIBUTION)/include
+     RGB_LIBDIR=$(RGB_LIB_DISTRIBUTION)/lib
+     RGB_LIBRARY_NAME=rgbmatrix
+     RGB_LIBRARY=$(RGB_LIBDIR)/lib$(RGB_LIBRARY_NAME).a
+     LDFLAGS+=-L$(RGB_LIBDIR) -l$(RGB_LIBRARY_NAME) -lrt -lm -lpthread
+
+Also, you want to add a target to build the libary in your sub-module
+
+	 # (FYI: Make sure, there is a TAB-character in front of the $(MAKE))
+     $(RGB_LIBRARY):
+		 $(MAKE) -C $(RGB_LIBDIR)
+
+Now, your final binary needs to depend on your objects and also the
+`$(RGB_LIBRARY)`
+
+     my-binary : $(OBJECTS) $(RGB_LIBRARY)
+	     $(CXX) $(CXXFLAGS) $(OBJECTS) -o $@ $(LDFLAGS)
+
+As an example, see the [PixelPusher implementation][pixelpush] which is using
+this library in a git sub-module.
+
+If you are writing your own Makefile, make sure to pass the `-O3` option to
+the compiler to make sure to generate fast code.
+
+Note, all the types provided are in the `rgb_matrix` namespace. That way, they
+won't clash with other types you might use in your code; in particular pretty
+common names such as `GPIO` or `Canvas` might run into clashing trouble.
+
+Anyway, for convenience you just might add using-declarations in your
+code:
+
+     // Types exported by the RGB-Matrix library.
+     using rgb_matrix::Canvas;
+     using rgb_matrix::GPIO;
+     using rgb_matrix::RGBMatrix;
+
+Or, if you are lazy, just import the whole namespace:
+
+     using namespace rgb_matrix;
+
+Read the [`minimal-example.cc`](./minimal-example.cc) to get started, then
+have a look into [`demo-main.cc`](./demo-main.cc).
+
+## Remapping coordinates ##
+
+You might choose a different physical layout than the wiring provides.
+
+There is an option `--led-pixel-mapper` that allows you to choose between
+some re-mapping options, and also programmatic ways to do so.
+
+### Standard mappers
+
+#### U-mapper (U-shape connection)
+Say you have 4 displays with 32x32 and only a single output
+like with a Raspberry Pi 1 or the Adafruit HAT -- if we chain
+them, we get a display 32 pixel high, (4*32)=128 pixel long. If we arrange
+the boards in a U-shape so that they form a square, we get a logical display
+of 64x64 pixels:
+
+<img src="../img/chained-64x64.jpg" width="400px"> In action:
+[![PixelPusher video][pp-vid]](http://youtu.be/ZglGuMaKvpY)
+
+```
+So the following chain (Viewed looking at the LED-side of the panels)
+    [<][<][<][<] }- Raspbery Pi connector
+
+is arranged in this U-shape (on its side)
+    [<][<] }----- Raspberry Pi connector
+    [>][>]
+```
+
+Now we need to internally map pixels the pixels so that the 'folded' 128x32
+screen behaves like a 64x64 screen.
+
+There is a pixel-mapper that can help with this "U-Arrangement", you choose
+it with `--led-pixel-mapper=U-mapper`. So in this particular case,
+
+```
+  ./demo --led-chain=4 --led-pixel-mapper="U-mapper"
+```
+
+This works for longer and more than one chain as well. Here an arrangement with
+two chains with 8 panels each
+
+```
+   [<][<][<][<]  }--- Pi connector #1
+   [>][>][>][>]
+   [<][<][<][<]  }--- Pi connector #2
+   [>][>][>][>]
+```
+
+(`--led-chain=8 --led-parallel=2 --led-pixel-mapper="U-mapper"`).
+
+#### V-mapper and Vmapper:Z (Vertical arrangement)
+
+By default, when you add panels on a chain, they are added horizontally.
+If you have 2 panels of 64x32, you get 128x32.
+The V-mapper allows the stacking to be vertical and not horizontal and
+get the 64x64 you might want.
+
+By default, all the panels are correct side up, and you need more cable length
+as you need to cross back to the start of the next panel.
+If you wish to use shorter cables, you can add use Vmapper:Z which will give
+you serpentine cabling and every other panel will be upside down (see below
+for an example).
+
+It is compatible with parallel chains, so you can have multiple stacks
+of panels all building a coherent overall display.
+
+Here an example with 3 chains of 4 panels (128x64) for a total of about
+98k display pixels.
+
+```
+  ./demo --led-rows=64 --led-cols=128 --led-chain=4 -led-parallel=3 --led-pixel-mapper=V-mapper -D0
+```
+
+Viewed looking the LED-side of the panels:
+
+```
+         Vmapper                             Vmapper:Z
+
+  [O < I] [O < I] [O < I]             [I > O] [I > O] [I > O]
+   ,---^   ,---^   ,---^               ^       ^       ^
+  [O < I] [O < I] [O < I]             [O < I] [O < I] [O < I]
+   ,---^   ,---^   ,---^                   ^       ^       ^
+  [O < I] [O < I] [O < I]             [I > O] [I > O] [I > O]
+   ,---^   ,---^   ,---^               ^       ^       ^
+  [O < I] [O < I] [O < I]             [O < I] [O < I] [O < I]
+       ^       ^       ^                   ^       ^       ^
+      #1      #2       #3                 #1      #2       #3
+         Pi connector (three parallel chains of len 4)
+```
+
+ (This is also a good time to notice that 384x256 with 12 128x64 panels, is probably an
+upper limit of what you can reasonably output without having an unusable fresh
+rate (Try these options to help: --led-pwm-bits=7 --led-pwm-dither-bits=1 and get about 100Hz)).
+
+This shows the wiring of a 3x5 Vmapper:Z array built by Marc MERLIN, using 15x 64x32 panels:
+![Vmapper_Z_192x160_3x5.jpg](../img/Vmapper_Z_192x160_3x5.jpg)
+With --led-pwm-bits=7 --led-pwm-dither-bits=1, it gets a better 300Hz refresh
+but only offers around 31K pixels instead of 98K pixels in the previous example.
+
+Please note that Vmapper can also be used to improve the refresh rate of a long
+display even if it is only one panel high (e.g. for a text running output) by
+splitting the load into multiple parallel chains.
+
+```
+
+  [O < I] [O < I] [O < I]
+       ^       ^       ^
+      #1      #2       #3 Pi connector (three parallel chains of len 1)
+```
+
+#### Rotate
+
+The "Rotate" mapper allows you to rotate your screen. It takes an angle
+as parameter after a colon:
+
+```
+  ./demo --led-pixel-mapper="Rotate:90"
+```
+
+#### Mirror
+
+The 'Mirror' mapper allows to mirror the output horizontally or vertically.
+Without parameter, it mirrors horizontally. The parameter is a single character
+'H' or 'V' for horizontal or vertical mirroring.
+
+```
+  ./demo --led-pixel-mapper="Mirror:H"
+```
+
+#### Combining Mappers
+
+You can chain multiple mappers in the configuration, by separating them
+with a semicolon. The mappers are applied in the sequence you give them, so
+if you want to arrange a couple of panels with the U-arrangement, and then
+rotate the resulting screen, use
+
+```
+  ./demo --led-chain=8 --led-parallel=3 --led-pixel-mapper="U-mapper;Rotate:90"
+```
+
+Here, we first create a 128x192 screen (4 panels wide (`4*32=128`),
+with three folded chains (`6*32=192`)) and then rotate it by 90 degrees to
+get a 192x128 screen.
+
+#### Programmatic access
+
+If you want to choose these mappers programmatically from your program and
+not via the flags, you can do this by setting the `pixel_mapper_config` option
+in the options struct in C++ or Python.
+
+```
+  options.pixel_mapper_config = "Rotate:90";
+```
+
+### Writing your own mappers
+
+If you want to write your own mappers, e.g. if you have a fancy panel
+arrangement, you can do so using the API provided.
+
+In the API, there is an interface to implement,
+a [`PixelMapper`](../include/pixel-mapper.h) that allows to program
+re-arrangements of pixels in any way. You can plug such an implementation of
+a `PixelMapper` into the RGBMatrix to use it:
+
+```
+  bool RGBMatrix::ApplyPixelMapper(const PixelMapper *mapper);
+```
+
+If you want, you can also register your PixelMapper globally before you
+parse the command line options; then this pixel-mapper is automatically
+provided in the `--led-pixel-mapper` command line option:
+
+```
+   RegisterPixelMapper(new MyOwnPixelMapper());
+   RGBMatrix *matrix = RGBMatrix::CreateFromFlags(...);
+```
+
+Now your mapper can be used alongside (and combined with) the standard
+mappers already there (e.g. "U-mapper" or "Rotate"). Your mapper can have
+parameters: In the command-line flag, parameters provided after `:` are passed
+as-is to your `SetParameters()` implementation
+(e.g. using `--led-pixel-mapper="Rotate:90"`, the `Rotate` mapper
+gets a parameter string `"90"` as parameter).
+
+#### Multiplex Mappers
+
+Sometimes you even need this for the panel itself: In some panels
+(typically the 'outdoor panels', often with 1:4 multiplexing) the pixels
+are not mapped in a straight-forward way, but in a snake arrangement for
+instance.
+
+There are simplified pixel mappers for this purpose, the
+[multiplex mappers](../lib/multiplex-mappers.cc). These are defined there
+and then can be accessed via the command line flag `--led-multiplexing=...`.
+
+If you find that whatever parameter you give to `--led-multiplexing=` doesn't
+work, you might need to write your own mapper (extend `MultiplexMapperBase`
+and implement the one method `MapSinglePanel()`). Then register them with
+the `CreateMultiplexMapperList()` function in that file. When you do this,
+this will automatically become available in the `--led-multiplexing=` command
+line option in C++ and Python.
+
+[run-vid]: ../img/running-vid.jpg
+[git-submodules]: http://git-scm.com/book/en/Git-Tools-Submodules
+[pixelpush]: https://github.com/hzeller/rpi-matrix-pixelpusher
+[pp-vid]: ../img/pixelpusher-vid.jpg
+[otf2bdf]: https://github.com/jirutka/otf2bdf

depends/rpi-rgb-led-matrix/examples-api-use/c-example.c

@@ -0,0 +1,61 @@
+/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+ *
+ * Using the C-API of this library.
+ *
+ */
+#include "led-matrix-c.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+  struct RGBLedMatrixOptions options;
+  struct RGBLedMatrix *matrix;
+  struct LedCanvas *offscreen_canvas;
+  int width, height;
+  int x, y, i;
+
+  memset(&options, 0, sizeof(options));
+  options.rows = 32;
+  options.chain_length = 1;
+
+  /* This supports all the led commandline options. Try --led-help */
+  matrix = led_matrix_create_from_options(&options, &argc, &argv);
+  if (matrix == NULL)
+    return 1;
+
+  /* Let's do an example with double-buffering. We create one extra
+   * buffer onto which we draw, which is then swapped on each refresh.
+   * This is typically a good aproach for animations and such.
+   */
+  offscreen_canvas = led_matrix_create_offscreen_canvas(matrix);
+
+  led_canvas_get_size(offscreen_canvas, &width, &height);
+
+  fprintf(stderr, "Size: %dx%d. Hardware gpio mapping: %s\n",
+          width, height, options.hardware_mapping);
+
+  for (i = 0; i < 1000; ++i) {
+    for (y = 0; y < height; ++y) {
+      for (x = 0; x < width; ++x) {
+        led_canvas_set_pixel(offscreen_canvas, x, y, i & 0xff, x, y);
+      }
+    }
+
+    /* Now, we swap the canvas. We give swap_on_vsync the buffer we
+     * just have drawn into, and wait until the next vsync happens.
+     * we get back the unused buffer to which we'll draw in the next
+     * iteration.
+     */
+    offscreen_canvas = led_matrix_swap_on_vsync(matrix, offscreen_canvas);
+  }
+
+  /*
+   * Make sure to always call led_matrix_delete() in the end to reset the
+   * display. Installing signal handlers for defined exit is a good idea.
+   */
+  led_matrix_delete(matrix);
+
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/clock.cc

@@ -0,0 +1,198 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Example of a clock. This is very similar to the text-example,
+// except that it shows the time :)
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+#include "graphics.h"
+
+#include <getopt.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <vector>
+#include <string>
+
+using namespace rgb_matrix;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+static int usage(const char *progname) {
+  fprintf(stderr, "usage: %s [options]\n", progname);
+  fprintf(stderr, "Reads text from stdin and displays it. "
+          "Empty string: clear screen\n");
+  fprintf(stderr, "Options:\n");
+  fprintf(stderr,
+          "\t-d <time-format>  : Default '%%H:%%M'. See strftime()\n"
+          "\t                    Can be provided multiple times for multiple "
+          "lines\n"
+          "\t-f <font-file>    : Use given font.\n"
+          "\t-x <x-origin>     : X-Origin of displaying text (Default: 0)\n"
+          "\t-y <y-origin>     : Y-Origin of displaying text (Default: 0)\n"
+          "\t-s <line-spacing> : Extra spacing between lines when multiple -d given\n"
+          "\t-S <spacing>      : Extra spacing between letters (Default: 0)\n"
+          "\t-C <r,g,b>        : Color. Default 255,255,0\n"
+          "\t-B <r,g,b>        : Background-Color. Default 0,0,0\n"
+          "\t-O <r,g,b>        : Outline-Color, e.g. to increase contrast.\n"
+          "\n"
+          );
+  rgb_matrix::PrintMatrixFlags(stderr);
+  return 1;
+}
+
+static bool parseColor(Color *c, const char *str) {
+  return sscanf(str, "%hhu,%hhu,%hhu", &c->r, &c->g, &c->b) == 3;
+}
+
+static bool FullSaturation(const Color &c) {
+  return (c.r == 0 || c.r == 255)
+    && (c.g == 0 || c.g == 255)
+    && (c.b == 0 || c.b == 255);
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options matrix_options;
+  rgb_matrix::RuntimeOptions runtime_opt;
+  if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
+                                         &matrix_options, &runtime_opt)) {
+    return usage(argv[0]);
+  }
+
+  // We accept multiple format lines
+
+  std::vector<std::string> format_lines;
+  Color color(255, 255, 0);
+  Color bg_color(0, 0, 0);
+  Color outline_color(0,0,0);
+  bool with_outline = false;
+
+  const char *bdf_font_file = NULL;
+  int x_orig = 0;
+  int y_orig = 0;
+  int letter_spacing = 0;
+  int line_spacing = 0;
+
+  int opt;
+  while ((opt = getopt(argc, argv, "x:y:f:C:B:O:s:S:d:")) != -1) {
+    switch (opt) {
+    case 'd': format_lines.push_back(optarg); break;
+    case 'x': x_orig = atoi(optarg); break;
+    case 'y': y_orig = atoi(optarg); break;
+    case 'f': bdf_font_file = strdup(optarg); break;
+    case 's': line_spacing = atoi(optarg); break;
+    case 'S': letter_spacing = atoi(optarg); break;
+    case 'C':
+      if (!parseColor(&color, optarg)) {
+        fprintf(stderr, "Invalid color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'B':
+      if (!parseColor(&bg_color, optarg)) {
+        fprintf(stderr, "Invalid background color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'O':
+      if (!parseColor(&outline_color, optarg)) {
+        fprintf(stderr, "Invalid outline color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      with_outline = true;
+      break;
+    default:
+      return usage(argv[0]);
+    }
+  }
+
+  if (format_lines.empty()) {
+    format_lines.push_back("%H:%M");
+  }
+
+  if (bdf_font_file == NULL) {
+    fprintf(stderr, "Need to specify BDF font-file with -f\n");
+    return usage(argv[0]);
+  }
+
+  /*
+   * Load font. This needs to be a filename with a bdf bitmap font.
+   */
+  rgb_matrix::Font font;
+  if (!font.LoadFont(bdf_font_file)) {
+    fprintf(stderr, "Couldn't load font '%s'\n", bdf_font_file);
+    return 1;
+  }
+  rgb_matrix::Font *outline_font = NULL;
+  if (with_outline) {
+    outline_font = font.CreateOutlineFont();
+  }
+
+  RGBMatrix *matrix = RGBMatrix::CreateFromOptions(matrix_options, runtime_opt);
+  if (matrix == NULL)
+    return 1;
+
+  const bool all_extreme_colors = (matrix_options.brightness == 100)
+    && FullSaturation(color)
+    && FullSaturation(bg_color)
+    && FullSaturation(outline_color);
+  if (all_extreme_colors)
+    matrix->SetPWMBits(1);
+
+  const int x = x_orig;
+  int y = y_orig;
+
+  FrameCanvas *offscreen = matrix->CreateFrameCanvas();
+
+  char text_buffer[256];
+  struct timespec next_time;
+  next_time.tv_sec = time(NULL);
+  next_time.tv_nsec = 0;
+  struct tm tm;
+
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  while (!interrupt_received) {
+    offscreen->Fill(bg_color.r, bg_color.g, bg_color.b);
+    localtime_r(&next_time.tv_sec, &tm);
+
+    int line_offset = 0;
+    for (const std::string &line : format_lines) {
+      strftime(text_buffer, sizeof(text_buffer), line.c_str(), &tm);
+      if (outline_font) {
+        rgb_matrix::DrawText(offscreen, *outline_font,
+                             x - 1, y + font.baseline() + line_offset,
+                             outline_color, NULL, text_buffer,
+                             letter_spacing - 2);
+      }
+      rgb_matrix::DrawText(offscreen, font,
+                           x, y + font.baseline() + line_offset,
+                           color, NULL, text_buffer,
+                           letter_spacing);
+      line_offset += font.height() + line_spacing;
+    }
+
+    // Wait until we're ready to show it.
+    clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &next_time, NULL);
+
+    // Atomic swap with double buffer
+    offscreen = matrix->SwapOnVSync(offscreen);
+
+    next_time.tv_sec += 1;
+  }
+
+  // Finished. Shut down the RGB matrix.
+  delete matrix;
+
+  write(STDOUT_FILENO, "\n", 1);  // Create a fresh new line after ^C on screen
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/image-example.cc

@@ -0,0 +1,160 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+//
+// Example how to display an image, including animated images using
+// ImageMagick. For a full utility that does a few more things, have a look
+// at the led-image-viewer in ../utils
+//
+// Showing an image is not so complicated, essentially just copy all the
+// pixels to the canvas. How to get the pixels ? In this example we're using
+// the graphicsmagick library as universal image loader library that
+// can also deal with animated images.
+// You can of course do your own image loading or use some other library.
+//
+// This requires an external dependency, so install these first before you
+// can call `make image-example`
+//   sudo apt-get update
+//   sudo apt-get install libgraphicsmagick++-dev libwebp-dev -y
+//   make image-example
+
+#include "led-matrix.h"
+
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <exception>
+#include <Magick++.h>
+#include <magick/image.h>
+
+using rgb_matrix::Canvas;
+using rgb_matrix::RGBMatrix;
+using rgb_matrix::FrameCanvas;
+
+// Make sure we can exit gracefully when Ctrl-C is pressed.
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+using ImageVector = std::vector<Magick::Image>;
+
+// Given the filename, load the image and scale to the size of the
+// matrix.
+// // If this is an animated image, the resutlting vector will contain multiple.
+static ImageVector LoadImageAndScaleImage(const char *filename,
+                                          int target_width,
+                                          int target_height) {
+  ImageVector result;
+
+  ImageVector frames;
+  try {
+    readImages(&frames, filename);
+  } catch (std::exception &e) {
+    if (e.what())
+      fprintf(stderr, "%s\n", e.what());
+    return result;
+  }
+
+  if (frames.empty()) {
+    fprintf(stderr, "No image found.");
+    return result;
+  }
+
+  // Animated images have partial frames that need to be put together
+  if (frames.size() > 1) {
+    Magick::coalesceImages(&result, frames.begin(), frames.end());
+  } else {
+    result.push_back(frames[0]); // just a single still image.
+  }
+
+  for (Magick::Image &image : result) {
+    image.scale(Magick::Geometry(target_width, target_height));
+  }
+
+  return result;
+}
+
+
+// Copy an image to a Canvas. Note, the RGBMatrix is implementing the Canvas
+// interface as well as the FrameCanvas we use in the double-buffering of the
+// animted image.
+void CopyImageToCanvas(const Magick::Image &image, Canvas *canvas) {
+  const int offset_x = 0, offset_y = 0;  // If you want to move the image.
+  // Copy all the pixels to the canvas.
+  for (size_t y = 0; y < image.rows(); ++y) {
+    for (size_t x = 0; x < image.columns(); ++x) {
+      const Magick::Color &c = image.pixelColor(x, y);
+      if (c.alphaQuantum() < 256) {
+        canvas->SetPixel(x + offset_x, y + offset_y,
+                         ScaleQuantumToChar(c.redQuantum()),
+                         ScaleQuantumToChar(c.greenQuantum()),
+                         ScaleQuantumToChar(c.blueQuantum()));
+      }
+    }
+  }
+}
+
+// An animated image has to constantly swap to the next frame.
+// We're using double-buffering and fill an offscreen buffer first, then show.
+void ShowAnimatedImage(const ImageVector &images, RGBMatrix *matrix) {
+  FrameCanvas *offscreen_canvas = matrix->CreateFrameCanvas();
+  while (!interrupt_received) {
+    for (const auto &image : images) {
+      if (interrupt_received) break;
+      CopyImageToCanvas(image, offscreen_canvas);
+      offscreen_canvas = matrix->SwapOnVSync(offscreen_canvas);
+      usleep(image.animationDelay() * 10000);  // 1/100s converted to usec
+    }
+  }
+}
+
+int usage(const char *progname) {
+  fprintf(stderr, "Usage: %s [led-matrix-options] <image-filename>\n",
+          progname);
+  rgb_matrix::PrintMatrixFlags(stderr);
+  return 1;
+}
+
+int main(int argc, char *argv[]) {
+  Magick::InitializeMagick(*argv);
+
+  // Initialize the RGB matrix with
+  RGBMatrix::Options matrix_options;
+  rgb_matrix::RuntimeOptions runtime_opt;
+  if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
+                                         &matrix_options, &runtime_opt)) {
+    return usage(argv[0]);
+  }
+
+  if (argc != 2)
+    return usage(argv[0]);
+  const char *filename = argv[1];
+
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  RGBMatrix *matrix = RGBMatrix::CreateFromOptions(matrix_options, runtime_opt);
+  if (matrix == NULL)
+    return 1;
+
+  ImageVector images = LoadImageAndScaleImage(filename,
+                                              matrix->width(),
+                                              matrix->height());
+  switch (images.size()) {
+  case 0:   // failed to load image.
+    break;
+  case 1:   // Simple example: one image to show
+    CopyImageToCanvas(images[0], matrix);
+    while (!interrupt_received) sleep(1000);  // Until Ctrl-C is pressed
+    break;
+  default:  // More than one image: this is an animation.
+    ShowAnimatedImage(images, matrix);
+    break;
+  }
+
+  matrix->Clear();
+  delete matrix;
+
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/input-example.cc

@@ -0,0 +1,64 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Small example how to use the input bits
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+
+#include <unistd.h>
+#include <math.h>
+#include <stdio.h>
+#include <signal.h>
+
+using rgb_matrix::RGBMatrix;
+using rgb_matrix::Canvas;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options defaults;
+  defaults.hardware_mapping = "regular";  // or e.g. "adafruit-hat"
+  defaults.rows = 32;
+  defaults.chain_length = 1;
+  defaults.parallel = 1;
+  RGBMatrix *matrix = RGBMatrix::CreateFromFlags(&argc, &argv, &defaults);
+  if (matrix == NULL)
+    return 1;
+
+  // It is always good to set up a signal handler to cleanly exit when we
+  // receive a CTRL-C for instance.
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  // Let's request all input bits and see which are actually available.
+  // This will differ depending on which hardware mapping you use and how
+  // many parallel chains you have.
+  const uint64_t available_inputs = matrix->RequestInputs(0xffffffff);
+  fprintf(stderr, "Available GPIO-bits: ");
+  for (int b = 0; b < 32; ++b) {
+      if (available_inputs & (1<<b))
+          fprintf(stderr, "%d ", b);
+  }
+  fprintf(stderr, "\n");
+
+  while (!interrupt_received) {
+      // Block and wait until any input bit changed or 100ms passed
+      uint32_t inputs = matrix->AwaitInputChange(100);
+
+      // Minimal output: let's show the bits with LEDs in the first row
+      for (int b = 0; b < 32; ++b) {
+          uint8_t col = (inputs & (1<<b)) ? 255 : 0;
+          matrix->SetPixel(32-b, 0, col, col, col);
+      }
+  }
+
+  fprintf(stderr, "Exiting.\n");
+  matrix->Clear();
+  delete matrix;
+
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/ledcat.cc

@@ -0,0 +1,82 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// A program that reads frames form STDIN as RGB24, much like
+// https://github.com/polyfloyd/ledcat does.
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+
+#define FPS 60
+
+using rgb_matrix::RGBMatrix;
+using rgb_matrix::Canvas;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options defaults;
+  defaults.hardware_mapping = "regular"; // or e.g. "adafruit-hat"
+  defaults.rows = 32;
+  defaults.chain_length = 1;
+  defaults.parallel = 1;
+  Canvas *canvas = RGBMatrix::CreateFromFlags(&argc, &argv, &defaults);
+  if (canvas == NULL) {
+    return 1;
+  }
+
+  // It is always good to set up a signal handler to cleanly exit when we
+  // receive a CTRL-C for instance. The DrawOnCanvas() routine is looking
+  // for that.
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  ssize_t frame_size = canvas->width() * canvas->height() * 3;
+  uint8_t buf[frame_size];
+
+  while (1) {
+    struct timespec start;
+    timespec_get(&start, TIME_UTC);
+
+    ssize_t nread;
+    ssize_t total_nread = 0;
+    while ((nread = read(STDIN_FILENO, &buf[total_nread], frame_size - total_nread)) > 0) {
+      if (interrupt_received) {
+        return 1;
+      }
+      total_nread += nread;
+    }
+    if (total_nread < frame_size){
+      break;
+    }
+
+    for (int y = 0; y < canvas->height(); y++) {
+      for (int x = 0; x < canvas->width(); x++) {
+        uint8_t *p = &buf[(y * canvas->width() + x) * 3];
+        uint8_t r = *(p+0), g = *(p+1), b = *(p+2);
+        canvas->SetPixel(x, y, r, g, b);
+      }
+    }
+
+    struct timespec end;
+    timespec_get(&end, TIME_UTC);
+    long tudiff = (end.tv_nsec / 1000 + end.tv_sec * 1000000) - (start.tv_nsec / 1000 + start.tv_sec * 1000000);
+    if (tudiff < 1000000l / FPS) {
+      usleep(1000000l / FPS - tudiff);
+    }
+  }
+
+  // Animation finished. Shut down the RGB matrix.
+  canvas->Clear();
+  delete canvas;
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/minimal-example.cc

@@ -0,0 +1,69 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Small example how to use the library.
+// For more examples, look at demo-main.cc
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+
+#include <unistd.h>
+#include <math.h>
+#include <stdio.h>
+#include <signal.h>
+
+using rgb_matrix::RGBMatrix;
+using rgb_matrix::Canvas;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+static void DrawOnCanvas(Canvas *canvas) {
+  /*
+   * Let's create a simple animation. We use the canvas to draw
+   * pixels. We wait between each step to have a slower animation.
+   */
+  canvas->Fill(0, 0, 255);
+
+  int center_x = canvas->width() / 2;
+  int center_y = canvas->height() / 2;
+  float radius_max = canvas->width() / 2;
+  float angle_step = 1.0 / 360;
+  for (float a = 0, r = 0; r < radius_max; a += angle_step, r += angle_step) {
+    if (interrupt_received)
+      return;
+    float dot_x = cos(a * 2 * M_PI) * r;
+    float dot_y = sin(a * 2 * M_PI) * r;
+    canvas->SetPixel(center_x + dot_x, center_y + dot_y,
+                     255, 0, 0);
+    usleep(1 * 1000);  // wait a little to slow down things.
+  }
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options defaults;
+  defaults.hardware_mapping = "regular";  // or e.g. "adafruit-hat"
+  defaults.rows = 32;
+  defaults.chain_length = 1;
+  defaults.parallel = 1;
+  defaults.show_refresh_rate = true;
+  Canvas *canvas = RGBMatrix::CreateFromFlags(&argc, &argv, &defaults);
+  if (canvas == NULL)
+    return 1;
+
+  // It is always good to set up a signal handler to cleanly exit when we
+  // receive a CTRL-C for instance. The DrawOnCanvas() routine is looking
+  // for that.
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  DrawOnCanvas(canvas);    // Using the canvas.
+
+  // Animation finished. Shut down the RGB matrix.
+  canvas->Clear();
+  delete canvas;
+
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/pixel-mover.cc

@@ -0,0 +1,210 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Small example how to use the input bits
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+#include "graphics.h"
+
+#include <ctype.h>
+#include <getopt.h>
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <deque>
+
+using namespace rgb_matrix;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+static void InteractiveUseMessage() {
+  fprintf(stderr,
+          "Move around with common movement keysets \n"
+          " W,A,S,D (gaming move style) or\n"
+          " H,J,K,L (vi console move style)\n"
+          " Quit with 'q' or <ESC>\n"
+          "The pixel position cannot be less than 0 or greater than the "
+          "display height and width.\n");
+}
+
+static int usage(const char *progname) {
+  fprintf(stderr, "usage: %s [options]\n", progname);
+  fprintf(stderr, "Display single pixel with any colour.\n");
+  InteractiveUseMessage();
+  fprintf(stderr, "Options:\n\n");
+  fprintf(stderr,
+          "\t-C <r,g,b>                : Color at front of trail. Default 255,255,0\n"
+          "\t-t <trail-len>            : Length of trail behind dot (default:0)\n"
+          "\t-c <r,g,b>                : Color at end of trail. Default 0,0,255\n\n"
+          );
+  rgb_matrix::PrintMatrixFlags(stderr);
+  return 1;
+}
+
+static bool parseColor(Color *c, const char *str) {
+  return sscanf(str, "%hhu,%hhu,%hhu", &c->r, &c->g, &c->b) == 3;
+}
+
+static char getch() {
+  static bool is_terminal = isatty(STDIN_FILENO);
+
+  struct termios old;
+  if (is_terminal) {
+    if (tcgetattr(0, &old) < 0)
+      perror("tcsetattr()");
+
+    // Set to unbuffered mode
+    struct termios no_echo = old;
+    no_echo.c_lflag &= ~ICANON;
+    no_echo.c_lflag &= ~ECHO;
+    no_echo.c_cc[VMIN] = 1;
+    no_echo.c_cc[VTIME] = 0;
+    if (tcsetattr(0, TCSANOW, &no_echo) < 0)
+      perror("tcsetattr ICANON");
+  }
+
+  char buf = 0;
+  if (read(STDIN_FILENO, &buf, 1) < 0)
+    perror ("read()");
+
+  if (is_terminal) {
+    // Back to original terminal settings.
+    if (tcsetattr(0, TCSADRAIN, &old) < 0)
+      perror ("tcsetattr ~ICANON");
+  }
+
+  return buf;
+}
+
+// Interpolation of color between head and tail of trail.
+static uint8_t quantize(float c) {
+  return c < 0 ? 0 : c > 255 ? 255 : roundf(c);
+}
+static Color interpolate(const Color &c1, const Color &c2, float fraction) {
+  float c2_fraction = 1 - fraction;
+  return { quantize(c1.r * fraction + c2.r * c2_fraction),
+           quantize(c1.g * fraction + c2.g * c2_fraction),
+           quantize(c1.b * fraction + c2.b * c2_fraction)};
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options matrix_options;
+  rgb_matrix::RuntimeOptions runtime_opt;
+  if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
+                                         &matrix_options, &runtime_opt)) {
+    return usage(argv[0]);
+  }
+
+  Color front_color(255, 255, 0);
+  Color back_color(0, 0, 255);
+
+  int trail_len = 0;
+  int opt;
+  while ((opt = getopt(argc, argv, "C:c:t:")) != -1) {
+    switch (opt) {
+    case 't':
+      trail_len = std::max(0, atoi(optarg));
+      break;
+    case 'C':
+      if (!parseColor(&front_color, optarg)) {
+        fprintf(stderr, "Invalid color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'c':
+      if (!parseColor(&back_color, optarg)) {
+        fprintf(stderr, "Invalid color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    default:
+      return usage(argv[0]);
+    }
+  }
+
+  RGBMatrix *matrix = RGBMatrix::CreateFromOptions(matrix_options, runtime_opt);
+  if (matrix == NULL)
+    return usage(argv[0]);
+
+  rgb_matrix::FrameCanvas *canvas = matrix->CreateFrameCanvas();
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  std::deque<std::pair<int, int>> trail;
+  int x_pos = 0;
+  int y_pos = 0;
+  trail.push_back({x_pos, y_pos});
+
+  InteractiveUseMessage();
+  const bool output_is_terminal = isatty(STDOUT_FILENO);
+
+  bool running = true;
+  while (!interrupt_received && running) {
+    canvas->Clear();
+    int distance_from_head = trail.size();
+    for (const auto &pos : trail) {   // Draw from tail -> head
+      distance_from_head--;
+      Color c = interpolate(front_color, back_color,
+                            1.0 - 1.0f * distance_from_head / trail.size());
+      canvas->SetPixel(pos.first, pos.second, c.r, c.g, c.b);
+    }
+    canvas = matrix->SwapOnVSync(canvas);
+
+    printf("%sX,Y = %d,%d%s",
+           output_is_terminal ? "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b" : "",
+           x_pos, y_pos,
+           output_is_terminal ? " " : "\n");
+    fflush(stdout);
+
+    const char c = tolower(getch());
+    switch (c) {
+    case 'w': case 'k':   // Up
+      if (y_pos > 0) {
+        y_pos--;
+        trail.push_back({x_pos, y_pos});
+      }
+      break;
+    case 's': case 'j':  // Down
+      if (y_pos < canvas->height() - 1) {
+        y_pos++;
+        trail.push_back({x_pos, y_pos});
+      }
+      break;
+    case 'a': case 'h':  // Left
+      if (x_pos > 0) {
+        x_pos--;
+        trail.push_back({x_pos, y_pos});
+      }
+      break;
+    case 'd': case 'l':  // Right
+      if (x_pos < canvas->width() - 1) {
+        x_pos++;
+        trail.push_back({x_pos, y_pos});
+      }
+      break;
+      // All kinds of conditions which we use to exit
+    case 0x1B:           // Escape
+    case 'q':            // 'Q'uit
+    case 0x04:           // End of file
+    case 0x00:           // Other issue from getch()
+      running = false;
+      break;
+    }
+
+    while ((int)trail.size() > trail_len + 1)
+      trail.pop_front();   // items on front are the oldest dots
+  }
+
+  // Finished. Shut down the RGB matrix.
+  delete matrix;
+  printf("\n");
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/scrolling-text-example.cc

@@ -0,0 +1,184 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Small example how to scroll text.
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+// For a utility with a few more features see
+// ../utils/text-scroller.cc
+
+#include "led-matrix.h"
+#include "graphics.h"
+
+#include <string>
+
+#include <getopt.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+using namespace rgb_matrix;
+
+volatile bool interrupt_received = false;
+static void InterruptHandler(int signo) {
+  interrupt_received = true;
+}
+
+static int usage(const char *progname) {
+  fprintf(stderr, "usage: %s [options] <text>\n", progname);
+  fprintf(stderr, "Takes text and scrolls it with speed -s\n");
+  fprintf(stderr, "Options:\n");
+  fprintf(stderr,
+          "\t-s <speed>        : Approximate letters per second. "
+          "(Zero for no scrolling)\n"
+          "\t-l <loop-count>   : Number of loops through the text. "
+          "-1 for endless (default)\n"
+          "\t-f <font-file>    : Use given font.\n"
+          "\t-x <x-origin>     : X-Origin of displaying text (Default: 0)\n"
+          "\t-y <y-origin>     : Y-Origin of displaying text (Default: 0)\n"
+          "\t-t <track=spacing>: Spacing pixels between letters (Default: 0)\n"
+          "\n"
+          "\t-C <r,g,b>        : Text-Color. Default 255,255,0\n"
+          "\t-B <r,g,b>        : Background-Color. Default 0,0,0\n"
+          "\n"
+          );
+  rgb_matrix::PrintMatrixFlags(stderr);
+  return 1;
+}
+
+static bool parseColor(Color *c, const char *str) {
+  return sscanf(str, "%hhu,%hhu,%hhu", &c->r, &c->g, &c->b) == 3;
+}
+
+static bool FullSaturation(const Color &c) {
+  return (c.r == 0 || c.r == 255)
+    && (c.g == 0 || c.g == 255)
+    && (c.b == 0 || c.b == 255);
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options matrix_options;
+  rgb_matrix::RuntimeOptions runtime_opt;
+  if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
+                                         &matrix_options, &runtime_opt)) {
+    return usage(argv[0]);
+  }
+
+  Color color(255, 255, 0);
+  Color bg_color(0, 0, 0);
+
+  const char *bdf_font_file = NULL;
+  std::string line;
+  /* x_origin is set by default just right of the screen */
+  const int x_default_start = (matrix_options.chain_length
+                               * matrix_options.cols) + 5;
+  int x_orig = x_default_start;
+  int y_orig = 0;
+  int letter_spacing = 0;
+  float speed = 7.0f;
+  int loops = -1;
+
+  int opt;
+  while ((opt = getopt(argc, argv, "x:y:f:C:B:t:s:l:")) != -1) {
+    switch (opt) {
+    case 's': speed = atof(optarg); break;
+    case 'l': loops = atoi(optarg); break;
+    case 'x': x_orig = atoi(optarg); break;
+    case 'y': y_orig = atoi(optarg); break;
+    case 'f': bdf_font_file = strdup(optarg); break;
+    case 't': letter_spacing = atoi(optarg); break;
+    case 'C':
+      if (!parseColor(&color, optarg)) {
+        fprintf(stderr, "Invalid color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'B':
+      if (!parseColor(&bg_color, optarg)) {
+        fprintf(stderr, "Invalid background color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    default:
+      return usage(argv[0]);
+    }
+  }
+
+  for (int i = optind; i < argc; ++i) {
+    line.append(argv[i]).append(" ");
+  }
+
+  if (line.empty()) {
+    fprintf(stderr, "Add the text you want to print on the command-line.\n");
+    return usage(argv[0]);
+  }
+
+  if (bdf_font_file == NULL) {
+    fprintf(stderr, "Need to specify BDF font-file with -f\n");
+    return usage(argv[0]);
+  }
+
+  /*
+   * Load font. This needs to be a filename with a bdf bitmap font.
+   */
+  rgb_matrix::Font font;
+  if (!font.LoadFont(bdf_font_file)) {
+    fprintf(stderr, "Couldn't load font '%s'\n", bdf_font_file);
+    return 1;
+  }
+
+  RGBMatrix *canvas = RGBMatrix::CreateFromOptions(matrix_options, runtime_opt);
+  if (canvas == NULL)
+    return 1;
+
+  const bool all_extreme_colors = (matrix_options.brightness == 100)
+    && FullSaturation(color)
+    && FullSaturation(bg_color);
+  if (all_extreme_colors)
+    canvas->SetPWMBits(1);
+
+  signal(SIGTERM, InterruptHandler);
+  signal(SIGINT, InterruptHandler);
+
+  printf("CTRL-C for exit.\n");
+
+  // Create a new canvas to be used with led_matrix_swap_on_vsync
+  FrameCanvas *offscreen_canvas = canvas->CreateFrameCanvas();
+
+  int delay_speed_usec = 1000000;
+  if (speed > 0) {
+    delay_speed_usec = 1000000 / speed / font.CharacterWidth('W');
+  } else if (x_orig == x_default_start) {
+    // There would be no scrolling, so text would never appear. Move to front.
+    x_orig = 0;
+  }
+
+  int x = x_orig;
+  int y = y_orig;
+  int length = 0;
+
+  while (!interrupt_received && loops != 0) {
+    offscreen_canvas->Fill(bg_color.r, bg_color.g, bg_color.b);
+    // length = holds how many pixels our text takes up
+    length = rgb_matrix::DrawText(offscreen_canvas, font,
+                                  x, y + font.baseline(),
+                                  color, nullptr,
+                                  line.c_str(), letter_spacing);
+
+    if (speed > 0 && --x + length < 0) {
+      x = x_orig;
+      if (loops > 0) --loops;
+    }
+
+    // Swap the offscreen_canvas with canvas on vsync, avoids flickering
+    offscreen_canvas = canvas->SwapOnVSync(offscreen_canvas);
+    usleep(delay_speed_usec);
+  }
+
+  // Finished. Shut down the RGB matrix.
+  delete canvas;
+
+  return 0;
+}

depends/rpi-rgb-led-matrix/examples-api-use/text-example.cc

@@ -0,0 +1,179 @@
+// -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
+// Small example how write text.
+//
+// This code is public domain
+// (but note, that the led-matrix library this depends on is GPL v2)
+
+#include "led-matrix.h"
+#include "graphics.h"
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+using namespace rgb_matrix;
+
+static int usage(const char *progname) {
+  fprintf(stderr, "usage: %s [options]\n", progname);
+  fprintf(stderr, "Reads text from stdin and displays it. "
+          "Empty string: clear screen\n");
+  fprintf(stderr, "Options:\n");
+  fprintf(stderr,
+          "\t-f <font-file>    : Use given font.\n"
+          "\t-x <x-origin>     : X-Origin of displaying text (Default: 0)\n"
+          "\t-y <y-origin>     : Y-Origin of displaying text (Default: 0)\n"
+          "\t-S <spacing>      : Spacing pixels between letters (Default: 0)\n"
+          "\t-C <r,g,b>        : Color. Default 255,255,0\n"
+          "\t-B <r,g,b>        : Font Background-Color. Default 0,0,0\n"
+          "\t-O <r,g,b>        : Outline-Color, e.g. to increase contrast.\n"
+          "\t-F <r,g,b>        : Panel flooding-background color. Default 0,0,0\n"
+          "\n"
+          );
+  rgb_matrix::PrintMatrixFlags(stderr);
+  return 1;
+}
+
+static bool parseColor(Color *c, const char *str) {
+  return sscanf(str, "%hhu,%hhu,%hhu", &c->r, &c->g, &c->b) == 3;
+}
+
+static bool FullSaturation(const Color &c) {
+  return (c.r == 0 || c.r == 255)
+    && (c.g == 0 || c.g == 255)
+    && (c.b == 0 || c.b == 255);
+}
+
+int main(int argc, char *argv[]) {
+  RGBMatrix::Options matrix_options;
+  rgb_matrix::RuntimeOptions runtime_opt;
+  if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
+                                         &matrix_options, &runtime_opt)) {
+    return usage(argv[0]);
+  }
+
+  Color color(255, 255, 0);
+  Color bg_color(0, 0, 0);
+  Color flood_color(0, 0, 0);
+  Color outline_color(0,0,0);
+  bool with_outline = false;
+
+  const char *bdf_font_file = NULL;
+  int x_orig = 0;
+  int y_orig = 0;
+  int letter_spacing = 0;
+
+  int opt;
+  while ((opt = getopt(argc, argv, "x:y:f:C:B:O:S:F:")) != -1) {
+    switch (opt) {
+    case 'x': x_orig = atoi(optarg); break;
+    case 'y': y_orig = atoi(optarg); break;
+    case 'f': bdf_font_file = strdup(optarg); break;
+    case 'S': letter_spacing = atoi(optarg); break;
+    case 'C':
+      if (!parseColor(&color, optarg)) {
+        fprintf(stderr, "Invalid color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'B':
+      if (!parseColor(&bg_color, optarg)) {
+        fprintf(stderr, "Invalid background color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    case 'O':
+      if (!parseColor(&outline_color, optarg)) {
+        fprintf(stderr, "Invalid outline color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      with_outline = true;
+      break;
+    case 'F':
+      if (!parseColor(&flood_color, optarg)) {
+        fprintf(stderr, "Invalid background color spec: %s\n", optarg);
+        return usage(argv[0]);
+      }
+      break;
+    default:
+      return usage(argv[0]);
+    }
+  }
+
+  if (bdf_font_file == NULL) {
+    fprintf(stderr, "Need to specify BDF font-file with -f\n");
+    return usage(argv[0]);
+  }
+
+  /*
+   * Load font. This needs to be a filename with a bdf bitmap font.
+   */
+  rgb_matrix::Font font;
+  if (!font.LoadFont(bdf_font_file)) {
+    fprintf(stderr, "Couldn't load font '%s'\n", bdf_font_file);
+    return 1;
+  }
+
+  /*
+   * If we want an outline around the font, we create a new font with
+   * the original font as a template that is just an outline font.
+   */
+  rgb_matrix::Font *outline_font = NULL;
+  if (with_outline) {
+    outline_font = font.CreateOutlineFont();
+  }
+
+  RGBMatrix *canvas = RGBMatrix::CreateFromOptions(matrix_options, runtime_opt);
+  if (canvas == NULL)
+    return 1;
+
+  const bool all_extreme_colors = (matrix_options.brightness == 100)
+    && FullSaturation(color)
+    && FullSaturation(bg_color)
+    && FullSaturation(outline_color);
+  if (all_extreme_colors)
+    canvas->SetPWMBits(1);
+
+  const int x = x_orig;
+  int y = y_orig;
+
+  if (isatty(STDIN_FILENO)) {
+    // Only give a message if we are interactive. If connected via pipe, be quiet
+    printf("Enter lines. Full screen or empty line clears screen.\n"
+           "Supports UTF-8. CTRL-D for exit.\n");
+  }
+
+  canvas->Fill(flood_color.r, flood_color.g, flood_color.b);
+  char line[1024];
+  while (fgets(line, sizeof(line), stdin)) {
+    const size_t last = strlen(line);
+    if (last > 0) line[last - 1] = '\0';  // remove newline.
+    bool line_empty = strlen(line) == 0;
+    if ((y + font.height() > canvas->height()) || line_empty) {
+      canvas->Fill(flood_color.r, flood_color.g, flood_color.b);
+      y = y_orig;
+    }
+    if (line_empty)
+      continue;
+    if (outline_font) {
+      // The outline font, we need to write with a negative (-2) text-spacing,
+      // as we want to have the same letter pitch as the regular text that
+      // we then write on top.
+      rgb_matrix::DrawText(canvas, *outline_font,
+                           x - 1, y + font.baseline(),
+                           outline_color, &bg_color, line, letter_spacing - 2);
+    }
+    // The regular text. Unless we already have filled the background with
+    // the outline font, we also fill the background here.
+    rgb_matrix::DrawText(canvas, font, x, y + font.baseline(),
+                         color, outline_font ? NULL : &bg_color, line,
+                         letter_spacing);
+    y += font.height();
+  }
+
+  // Finished. Shut down the RGB matrix.
+  delete canvas;
+
+  return 0;
+}