constant sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
                                CLK_ADDRESS_CLAMP_TO_EDGE |
                                CLK_FILTER_LINEAR;

struct input
{
	int test;
};


kernel void BWConvertor(read_only image2d_t frame, read_write image2d_t outImage, struct input params) {
    int2 gid = (int2)(get_global_id(0), get_global_id(1));
    int2 size = get_image_dim(frame);

    if(all(gid < size)){
        uint4 pixel = read_imageui(frame, sampler, gid);
        float4 color = convert_float4(pixel) / 255;
        //color.xyz = 0.2126*color.x + 0.7152*color.y + 0.0722*color.z;

        int a = 0.3*pixel.x + 0.59*pixel.y + 0.11*pixel.z;
        pixel.x = a;
        pixel.y = a;
        pixel.z = a;

        write_imageui(outImage, gid, pixel);
    }
}