inline documentation

canvas.go

@@ -66,6 +66,7 @@ func (c *Canvas) Close() error {
 	return c.m.Close()
 }
 
+// Matrix is an interface that represent any RGB matrix, very useful for testing
 type Matrix interface {
 	Geometry() (width, height int)
 	At(position int) color.Color

examples/basic/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"image/color"
 
 	"github.com/mcuadros/go-rpi-rgb-led-matrix"
@@ -9,6 +10,7 @@ import (
 
 var (
 	rows       = flag.Int("led-rows", 32, "number of rows supported")
+	parallel   = flag.Int("led-parallel", 1, "number of daisy-chained panels")
 	chain      = flag.Int("led-chain", 2, "number of displays daisy-chained")
 	brightness = flag.Int("brightness", 100, "brightness (0-100)")
 )
@@ -16,6 +18,7 @@ var (
 func main() {
 	config := &rgbmatrix.DefaultConfig
 	config.Rows = *rows
+	config.Parallel = *parallel
 	config.ChainLength = *chain
 	config.Brightness = *brightness
 
@@ -28,6 +31,7 @@ func main() {
 	bounds := c.Bounds()
 	for x := bounds.Min.X; x < bounds.Max.X; x++ {
 		for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+			fmt.Println("x", x, "y", y)
 			c.Set(x, y, color.RGBA{255, 0, 0, 255})
 			c.Render()
 		}

examples/image/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"image"
 	"os"
 	"time"
 
@@ -11,18 +12,21 @@ import (
 
 var (
 	rows       = flag.Int("led-rows", 32, "number of rows supported")
+	parallel   = flag.Int("led-parallel", 1, "number of daisy-chained panels")
 	chain      = flag.Int("led-chain", 2, "number of displays daisy-chained")
 	brightness = flag.Int("brightness", 100, "brightness (0-100)")
-	image      = flag.String("image", "", "image path")
+	img        = flag.String("image", "", "image path")
-	rotate     = flag.Int("rotate", 0, "rotate angle, 90, 180, 270")
+
+	rotate = flag.Int("rotate", 0, "rotate angle, 90, 180, 270")
 )
 
 func main() {
-	f, err := os.Open(*image)
+	f, err := os.Open(*img)
 	fatal(err)
 
 	config := &rgbmatrix.DefaultConfig
 	config.Rows = *rows
+	config.Parallel = *parallel
 	config.ChainLength = *chain
 	config.Brightness = *brightness
 

examples/rpc/server/main.go

@@ -10,6 +10,7 @@ import (
 var (
 	rows       = flag.Int("led-rows", 32, "number of rows supported")
 	chain      = flag.Int("led-chain", 2, "number of displays daisy-chained")
+	parallel   = flag.Int("led-parallel", 1, "number of daisy-chained panels")
 	brightness = flag.Int("brightness", 100, "brightness (0-100)")
 )
 
@@ -18,6 +19,7 @@ func main() {
 	config.Rows = *rows
 	config.ChainLength = *chain
 	config.Brightness = *brightness
+	config.Parallel = *parallel
 
 	m, err := rgbmatrix.NewRGBLedMatrix(config)
 	fatal(err)

toolkit.go

@@ -8,17 +8,29 @@ import (
 	"time"
 )
 
+// ToolKit is a convinient set of function to operate with a led of Matrix
 type ToolKit struct {
-	Canvas    *Canvas
+	// Canvas is the Canvas wrapping the Matrix, if you want to instanciate
+	// a ToolKit with a custom Canvas you can use directly the struct,
+	// without calling NewToolKit
+	Canvas *Canvas
+
+	// Transform function if present is applied just before draw the image to
+	// the Matrix, this is a small example:
+	//	tk.Transform = func(img image.Image) *image.NRGBA {
+	//		return imaging.Fill(img, 64, 96, imaging.Center, imaging.Lanczos)
+	//	}
 	Transform func(img image.Image) *image.NRGBA
 }
 
+// NewToolKit returns a new ToolKit wrapping the given Matrix
 func NewToolKit(m Matrix) *ToolKit {
 	return &ToolKit{
 		Canvas: NewCanvas(m),
 	}
 }
 
+// PlayImage draws the given image during the given delay
 func (tk *ToolKit) PlayImage(i image.Image, delay time.Duration) error {
 	start := time.Now()
 	defer func() { time.Sleep(delay - time.Since(start)) }()
@@ -31,6 +43,9 @@ func (tk *ToolKit) PlayImage(i image.Image, delay time.Duration) error {
 	return tk.Canvas.Render()
 }
 
+// PlayImages draws a sequence of images during the given delays, the len of
+// images should be equal to the len of delay. If loop is true the function
+// loops over images until a true is sent to the returned chan
 func (tk *ToolKit) PlayImages(images []image.Image, delay []time.Duration, loop int) chan bool {
 	quit := make(chan bool, 0)
 
@@ -60,6 +75,8 @@ func (tk *ToolKit) PlayImages(images []image.Image, delay []time.Duration, loop
 	return quit
 }
 
+// PlayGIF reads and draw a gif file from r. It use the contained images and
+// delays and loops over it, until a true is sent to the returned chan
 func (tk *ToolKit) PlayGIF(r io.Reader) (chan bool, error) {
 	gif, err := gif.DecodeAll(r)
 	if err != nil {
@@ -76,6 +93,7 @@ func (tk *ToolKit) PlayGIF(r io.Reader) (chan bool, error) {
 	return tk.PlayImages(images, delay, gif.LoopCount), nil
 }
 
+// Close close the toolkit and the inner canvas
 func (tk *ToolKit) Close() error {
 	return tk.Canvas.Close()
 }