kernel void initialize(size_t width, size_t height, write_only image2d_t output){
	size_t x = get_global_id(0);
	size_t y = get_global_id(1);

	int2 coord = {x, y};
	//uint4 color = {255 * x / (width - 1), 255 * y / (height - 1), 0, 255};
	//uint4 color = {255 * (x%2), 120 * (y%2), 0, 255};
	uint4 color = {255, 255, 0, 255};

	write_imageui(output, coord, color);
}

kernel void update(size_t width, size_t height, read_only image2d_t input, write_only image2d_t output){
	size_t x = get_global_id(0);
	size_t y = get_global_id(1);

	int2 coord = {x, y};

	const sampler_t samplerA = CLK_NORMALIZED_COORDS_FALSE
				 | CLK_ADDRESS_NONE
				 | CLK_FILTER_NEAREST;
	uint4 color = read_imageui(input, samplerA, coord).yzxw;
	color.x = 255 - color.x;
	write_imageui(output, coord, color);
}