libdraw

#include "../src/draw.h"

int main() {

	draw_debug = true;

	draw_window *window; int32_t w = 800, h = 600;

	if (draw_window_init(&window, w, h, "Draw", 0) == -1) { return -1; }

	bool left = false, right = false;

	uint32_t colour = 0xffff0000;

	draw_buffer *buf = draw_buffer_init(w, h);

	draw_buffer_clear(buf, 0xff000000);

	for (draw_event e; (e = draw_window_event(window)).kind != DRAW_EVENT_EXIT;) switch (e.kind) {

	case DRAW_EVENT_KEY:    {

		if (e.key.code == DRAW_KEY_1) { colour = 0xffff0000; }

		if (e.key.code == DRAW_KEY_2) { colour = 0xff00ff00; }

		if (e.key.code == DRAW_KEY_3) { colour = 0xff0000ff; }

	} break;

	case DRAW_EVENT_MOUSE:  {

		if (e.mouse.button == DRAW_MOUSE_LEFT) {

			if (e.mouse.direction == DRAW_PRESS) { left = true; }

			if (e.mouse.direction == DRAW_RELEASE) { left = false; }

		}

		else if (e.mouse.button == DRAW_MOUSE_RIGHT) {

			if (e.mouse.direction == DRAW_PRESS) { right = true; }

			if (e.mouse.direction == DRAW_RELEASE) { right = false; }

		}

		if (left) { draw_buffer_circle(buf, (point){e.mouse.x, e.mouse.y}, 6, colour, true); }

		if (right) { draw_buffer_circle(buf, (point){e.mouse.x, e.mouse.y}, 6, 0xff000000, true); }

		if (left || right) { goto redraw; }

	} break;

	case DRAW_EVENT_PAINT: redraw: {

		draw_window_draw(window, (point){0, 0}, buf, buf->bounds);

	} break;

	case DRAW_EVENT_RESIZE: {

		w = e.resize.w; h = e.resize.h;

		draw_buffer *old = buf;

		buf = draw_buffer_init(w, h);

		draw_buffer_clear(buf, 0xff000000);

		draw_buffer_copy(buf, old, (point){0, 0}, old->bounds);

		draw_buffer_free(&old);

	} break;

	default: { /* ignore */ } break;

	}

quit:

	draw_window_free(&window); return 0;

}