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27 lines
1.1 KiB
Plaintext
27 lines
1.1 KiB
Plaintext
#version 420
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#extension GL_ARB_texture_gather : enable
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// shader 9fad3b3505a6d831
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// Used for: Vertical Blur
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const float blurFactor = 1.0; //Higher is less blur
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// Implementation of http://rastergrid.com/blog/2010/09/efficient-gaussian-blur-with-linear-sampling/
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layout(binding = 0) uniform sampler2D textureUnitPS0;
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layout(location = 0) in vec4 passParameterSem0;
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layout(location = 0) out vec4 passPixelColor0;
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uniform float weight[] = float[](0.18571429, 0.28870130, 0.10363636, 0.01480519);
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uniform float offset[] = float[](0.00000000, 1.42105263, 3.31578947, 5.21052632);
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ivec2 inputRes = textureSize(textureUnitPS0, 0);
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vec2 outputRes = vec2(float(inputRes.x), float(inputRes.y));
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vec2 scale = outputRes * blurFactor;
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void main()
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{
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vec2 R0f = vec2(passParameterSem0.x, passParameterSem0.w);
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vec4 R1f = texture(textureUnitPS0, R0f) * weight[0];
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for (int i = 1; i<4; i++) {
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R1f += texture(textureUnitPS0, R0f + (vec2(0.0, offset[i]) / scale)) * weight[i];
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R1f += texture(textureUnitPS0, R0f - (vec2(0.0, offset[i]) / scale)) * weight[i];
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}
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passPixelColor0 = R1f;
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} |