conways-game-of-life-gpu/Conway_OpenCL/conway_align.cl

__kernel void conway_align(__read_only image2d_t front_image, __global char* back_image, __global int* num_workers, __global int* grid_width, __global int *grid_height)
{
	const sampler_t sampler=CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP | CLK_FILTER_NEAREST;

	// Caclulate the start and end range that this worker will be calculating
	int data_length = *grid_width * *grid_height;

	int start_range = (data_length / *num_workers) * get_global_id(0);
	int end_range = (data_length / *num_workers) * (get_global_id(0) + 1);


	for (int i = start_range; i < end_range; i++){
		
			uint4 pixel;
			pixel = read_imageui(front_image, sampler, (int2)(i,get_global_id(0)));

			back_image[i] = pixel.w / 255;
	}

}