Miscellany

void main()
{
	/* Load the image */
	char[] filename = "/home/joe/plasma.png";
	ubyte[] image;
	Info info = lodepng.png.decode32(image, cast(ubyte[])read(filename));
	if (info.error != 0)
		throw new Exception("Error loading png " ~ filename ~ ", errorcode: " ~ toString(info.error));
	if(image.length % 4 != 0)
		throw new Exception("Failcopter");
	ubyte[] data;
	for(uint i; i<image.length; i+=4){
		data ~= image[i+2];
		data ~= image[i+1];
		data ~= image[i];
		data ~= image[i+3];
	}

	image = null;

	/* Display the image to an X window, with XCB */
	int screen_num;
	xcb_connection_t* conn = xcb_connect(null, &screen_num);
	/* Get the preferred screen. */
	xcb_screen_iterator_t screen_iter = xcb_setup_roots_iterator(xcb_get_setup(c));
	while(screen_num--)
		xcb_screen_next(&screen_iter);
	xcb_screen_t* screen = screen_iter.data;
	xcb_window_t window = xcb_generate_id(conn);

	xcb_create_window(conn,                          /* connection    */
	                  0,                             /* depth         */
	                  window,                        /* window id     */
	                  screen->root,                  /* parent window */
	                  0, 0,                          /* x, y          */
	                  info.w, info.w,                /* width, height */
	                  0,                             /* border_width  */
	                  XCB_WINDOW_CLASS_INPUT_OUTPUT, /* class         */
	                  screen->root_visual,           /* visual        */
	                  XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, /* masks */
	                  [screen->black_pixel, XCB_EVENT_MASK_EXPOSURE]);

	xcb_map_window(conn, window);
	xcb_gcontext_t gc = xcb_generate_id(conn);
	xcb_create_gc(conn, gc, window, 0, null);

	/*
	Visual* vis = XDefaultVisualOfScreen(screen);
	XImage* im = XCreateImage(disp, vis, 24, ZPixmap, 0, data.ptr, info.w, info.h, 8, 0);
	data = null;
	XPutImage(disp, win, gc, im, 0, 0, 0, 0, info.w, info.h);
	*/
	xcb_flush(conn);

	xcb_generic_event_t *event;
	while(1) {
		event = xcb_wait_for_event(conn);
		if(event->response_type == XCB_EXPOSE) {
			xcb_put_image(conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
			              window, gc,
			              info.w, info.h, /* width, height */
			              0, 0,           /* dst_x, dst_y */
			              0, 24,          /* left_pad, depth */
			              data.length, data.ptr);
			xcb_flush(conn);
		}
	}
}