48 lines
1.5 KiB
GLSL
48 lines
1.5 KiB
GLSL
// Exclusive to SSAO for now
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#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 vec2 dirInv; // texStep
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in vec2 texCoord;
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out vec4 fragColor;
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const float blurWeights[5] = float[] (0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216);
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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.r += 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.r += 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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vec2 tc = texCoord * ssaoTextureScale;
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vec3 nor = getNor(texture(gbuffer0, texCoord).rg);
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fragColor.r = texture(tex, tc).r * blurWeights[0];
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float weight = blurWeights[0];
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weight += doBlur(blurWeights[1], 1, nor, tc);
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weight += doBlur(blurWeights[2], 2, nor, tc);
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weight += doBlur(blurWeights[3], 3, nor, tc);
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weight += doBlur(blurWeights[4], 4, nor, tc);
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fragColor = vec4(fragColor.r / weight); // SSAO only
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} |