toaruos/userspace/tests/test-gfx.c

/*
 * test-gfx
 *
 * Windowed graphical test application.
 */
#include <stdlib.h>
#include <assert.h>
#include <math.h>

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

sprite_t * sprites[128];
sprite_t alpha_tmp;
window_t * wina;

uint16_t win_width;
uint16_t win_height;

gfx_context_t * ctx;

int center_x(int x) {
	return (win_width - x) / 2;
}

int center_y(int y) {
	return (win_height - y) / 2;
}

static void init_sprite_png(int id, char * path) {
	sprites[id] = malloc(sizeof(sprite_t));
	load_sprite_png(sprites[id], path);
}


void darken(gfx_context_t * ctx) {
	for (uint16_t y = 0; y < ctx->height; ++y) {
		for (uint16_t x = 0; x < ctx->width; ++x) {
			GFX(ctx, x, y) = alpha_blend(GFX(ctx,x,y), rgb(0,0,0), rgb(1,0,0));
		}
	}
}

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

int main (int argc, char ** argv) {
	setup_windowing();
	resize_window_callback = resize_callback;

	int width  = 600;
	int height = 400;

	win_width = width;
	win_height = height;

	init_decorations();


	/* Do something with a window */
	wina = window_create(300, 300, width, height);
	assert(wina);
	ctx = init_graphics_window_double_buffer(wina);

	draw_fill(ctx, rgb(0,0,0));
	flip(ctx);

	init_sprite_png(1, "/usr/share/logo_login.png");

	flip(ctx);


	uint32_t i = 0;

	while (1) {
		++i;
		double herp = cos((double)i * 0.01) + 1.5;
		double derp = sin((double)i * 0.01) + 1.5;
		char ch = 0;
		w_keyboard_t * kbd = poll_keyboard_async();
		if (kbd) {
			ch = kbd->key;
			free(kbd);
			if (ch == 'q') {
				goto done;
				break;
			}
		}
		darken(ctx);
		draw_sprite_scaled(ctx, sprites[1], center_x(sprites[1]->width * herp), center_y(sprites[1]->height * derp), sprites[1]->width * herp, sprites[1]->height * derp);
		render_decorations(wina, ctx, "Graphics Test");
		flip(ctx);
	}
done:

#if 1
	teardown_windowing();
#endif

	return 0;
}