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60 lines
1.5 KiB
60 lines
1.5 KiB
__kernel void conway_compute(__write_only image2d_t front_image, __global char* back_image, __global int* num_workers, __global int* grid_width, __global int *grid_height)
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{
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float4 black = (float4)(0.49, 0.68, 0.81, 1.0);
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float4 white = (float4)(1.0, 1.00, 1.0, 0.5);
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// Caclulate the start and end range that this worker will be calculating
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int data_length = *grid_width * *grid_height;
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int start_range = (data_length / *num_workers) * get_global_id(0);
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int end_range = (data_length / *num_workers) * (get_global_id(0) + 1);
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// x, y + 1
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int neighbors = 0;
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for (int i = start_range; i < end_range; i++){
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int2 pixelcoord = (int2) (i % *grid_width, i / *grid_height);
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// add all 8 blocks to neghbors
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neighbors = 0;
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// Top
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neighbors += back_image[i - *grid_width];
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// Top right
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neighbors += back_image[i - *grid_width + 1];
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/// Right
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neighbors += back_image[i + 1];
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/// Bottom Right
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neighbors += back_image[i + *grid_width + 1];
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// Bottom
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neighbors += back_image[i + *grid_width];
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// Bottom Left
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neighbors += back_image[i + *grid_width - 1];
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// Left
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neighbors += back_image[i - 1];
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// Top left
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neighbors += back_image[i - *grid_width - 1];
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// push living status to the padded second char
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//write_imagef(front_image, pixelcoord, black);
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if (neighbors == 3 || (neighbors == 2 && back_image[i] == 1) || back_image[i] < 0){
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write_imagef(front_image, pixelcoord, white);
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}
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else{
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write_imagef(front_image, pixelcoord, black);
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}
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}
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} |