51 lines
1.6 KiB
GLSL
51 lines
1.6 KiB
GLSL
#version 450
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#include "../compiled.glsl"
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#include "../std/gbuffer.glsl"
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uniform sampler2D tex;
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uniform sampler2D gbuffer0;
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uniform sampler2D dist;
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uniform vec2 dirInv; // texStep
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in vec2 texCoord;
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out float fragColor;
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const float blurWeights[10] = float[] (0.132572, 0.125472, 0.106373, 0.08078, 0.05495, 0.033482, 0.018275, 0.008934, 0.003912, 0.001535);
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const float discardThreshold = 0.95;
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float doBlur(const float blurWeight, const int pos, const vec3 nor, const vec2 texCoord) {
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const float posadd = pos + 0.5;
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vec3 nor2 = getNor(texture(gbuffer0, texCoord + pos * dirInv).rg);
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float influenceFactor = step(discardThreshold, dot(nor2, nor));
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float col = texture(tex, texCoord + posadd * dirInv).r;
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fragColor += col * blurWeight * influenceFactor;
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float weight = blurWeight * influenceFactor;
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nor2 = getNor(texture(gbuffer0, texCoord - pos * dirInv).rg);
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influenceFactor = step(discardThreshold, dot(nor2, nor));
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col = texture(tex, texCoord - posadd * dirInv).r;
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fragColor += col * blurWeight * influenceFactor;
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weight += blurWeight * influenceFactor;
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return weight;
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}
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void main() {
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vec3 nor = getNor(texture(gbuffer0, texCoord).rg);
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float sm = texture(tex, texCoord).r;
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fragColor = sm * blurWeights[0];
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float weight = blurWeights[0];
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float d = texture(dist, texCoord).r;
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int numTaps = min(int(d * 10 * penumbraScale), 10 * penumbraScale);
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#ifdef _PenumbraScale
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for (int i = 1; i < numTaps; ++i) weight += doBlur(blurWeights[int(i / penumbraScale)], i, nor, texCoord);
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#else
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for (int i = 1; i < numTaps; ++i) weight += doBlur(blurWeights[i - 1], i, nor, texCoord);
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#endif
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fragColor /= weight;
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}
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