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61 lines
1.4 KiB
61 lines
1.4 KiB
__kernel void conway(__global unsigned char* front_grid, __global unsigned char* rear_grid, __global unsigned char* pixel_out, __global int* num_workers, __global int* grid_width, __global int* grid_height)
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{
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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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// add all 8 blocks to neighbors
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neighbors = 0;
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// Top
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neighbors += front_grid[i - *grid_width];
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// Top right
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neighbors += front_grid[i - *grid_width + 1];
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// Right
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neighbors += front_grid[i + 1];
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// Bottom Right
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neighbors += front_grid[i + *grid_width + 1];
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// Bottom
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neighbors += front_grid[i + *grid_width];
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// Bottom Left
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neighbors += front_grid[i + *grid_width - 1];
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// Left
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neighbors += front_grid[i - 1];
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// Top left
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neighbors += front_grid[i - *grid_width - 1];
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if (neighbors == 3 || (neighbors == 2 && front_grid[i])) {
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rear_grid[i] = 1;
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pixel_out[i * 4] = 255; // R
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pixel_out[i * 4 + 1] = 255; // G
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pixel_out[i * 4 + 2] = 255; // B
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pixel_out[i * 4 + 3] = 255; // A
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}
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else {
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rear_grid[i] = 0;
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pixel_out[i * 4] = 49; // R
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pixel_out[i * 4 + 1] = 68; // G
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pixel_out[i * 4 + 2] = 72; // B
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pixel_out[i * 4 + 3] = 255; // A
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}
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}
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} |