__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_NONE | 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++){ int2 pixelcoord = (int2) (i % *grid_width, i / *grid_height); int4 pixel; pixel = read_imagei(front_image, sampler, pixelcoord); char q = pixel.w / 255; back_image[i] = pixel.w / 255; } }