35 lines
972 B
Plaintext
35 lines
972 B
Plaintext
uniform sampler2D source;
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uniform layout(rgba16f) restrict writeonly image2D dest;
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uniform vec2 pixel;
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uniform float weights[7];
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// Gaussian separated blur with radius 6.
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layout (local_size_x = 8, local_size_y = 8) in;
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shared vec4 local_src[8][8 + 2 * 6];
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void main()
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{
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int x = int(gl_LocalInvocationID.x), y = int(gl_LocalInvocationID.y);
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ivec2 iuv = ivec2(gl_GlobalInvocationID.x, gl_GlobalInvocationID.y);
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vec2 guv = gl_GlobalInvocationID.xy + .5;
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vec2 uv_m = (guv - vec2(0, 6)) * pixel;
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vec2 uv = guv * pixel;
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vec2 uv_p = (guv + vec2(0, 6)) * pixel;
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local_src[x][y] = texture(source, uv_m);
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local_src[x][y + 6] = texture(source, uv);
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local_src[x][y + 12] = texture(source, uv_p);
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barrier();
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vec4 sum = local_src[x][y + 6] * weights[0];
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for (int i = 1; i < 6; i++) {
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sum += local_src[x][6 + y - i] * weights[i];
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sum += local_src[x][6 + y + i] * weights[i];
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}
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imageStore(dest, iuv, sum);
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}
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