35 lines
765 B
GLSL
35 lines
765 B
GLSL
#version 150 core
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in vec2 ioFragTexCoords;
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out vec3 outColor;
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uniform sampler2D uAmbientOcclusion;
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uniform int uBlurSize;
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float box_blur_occlusion (sampler2D ambient_occlusion, vec2 tex_coord, int size) {
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vec2 texel_size = 1.0 / vec2(textureSize(uAmbientOcclusion, 0));
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float value = 0.;
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int count = 0;
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for (int i = -size; i < size; i++) {
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for (int j = -size; j < size; j++) {
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value += texture(ambient_occlusion, tex_coord + vec2(i,j) * texel_size).x;
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count++;
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}
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}
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return value / (4 * size * size);
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}
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void main() {
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float occlusion;
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if (uBlurSize > 0) {
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occlusion = box_blur_occlusion(uAmbientOcclusion, ioFragTexCoords, uBlurSize);
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} else {
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occlusion = texture(uAmbientOcclusion, ioFragTexCoords).x;
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}
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outColor = vec3(occlusion);
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}
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