toaruos/userspace/gui/basic/drawlines.c

/*
 * drawlines
 *
 * Test application to draw lines to a window.
 */
#include <stdlib.h>
#include <assert.h>

#include "lib/window.h"
#include "lib/graphics.h"

int left, top, width, height;
window_t * wina;
gfx_context_t * ctx;

int32_t min(int32_t a, int32_t b) {
	return (a < b) ? a : b;
}

int32_t max(int32_t a, int32_t b) {
	return (a > b) ? a : b;
}

void resize_callback(window_t * window) {
	width  = window->width;
	height = window->height;
	reinit_graphics_window(ctx, wina);
	draw_fill(ctx, rgb(0,0,0));
}


int main (int argc, char ** argv) {
	left   = 100;
	top    = 100;
	width  = 500;
	height = 500;

	setup_windowing();
	resize_window_callback = resize_callback;

	/* Do something with a window */
	wina = window_create(left, top, width, height);
	assert(wina);

	ctx = init_graphics_window(wina);
	draw_fill(ctx, rgb(0,0,0));

	int exit = 0;
	while (!exit) {
		w_keyboard_t * kbd = poll_keyboard_async();
		if (kbd != NULL) {
			if (kbd->key == 'q')
				exit = 1;
			free(kbd);
		}

		draw_line(ctx, rand() % width, rand() % width, rand() % height, rand() % height, rgb(rand() % 255,rand() % 255,rand() % 255));
	}

	teardown_windowing();

	return 0;
}