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