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31 lines
1.0 KiB
GLSL
31 lines
1.0 KiB
GLSL
#version 120
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uniform sampler2D DiffuseSampler;
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varying vec2 texCoord;
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varying vec2 oneTexel;
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uniform float Radius;
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void main(){
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vec4 c = texture2D(DiffuseSampler, texCoord);
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vec4 maxVal = c;
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for(float u = 0.0; u <= Radius; u += 1.0) {
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for(float v = 0.0; v <= Radius; v += 1.0) {
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float weight = (((sqrt(u * u + v * v) / (Radius)) > 1.0) ? 0.0 : 1.0);
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vec4 s0 = texture2D(DiffuseSampler, texCoord + vec2(-u * oneTexel.x, -v * oneTexel.y));
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vec4 s1 = texture2D(DiffuseSampler, texCoord + vec2( u * oneTexel.x, v * oneTexel.y));
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vec4 s2 = texture2D(DiffuseSampler, texCoord + vec2(-u * oneTexel.x, v * oneTexel.y));
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vec4 s3 = texture2D(DiffuseSampler, texCoord + vec2( u * oneTexel.x, -v * oneTexel.y));
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vec4 o0 = max(s0, s1);
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vec4 o1 = max(s2, s3);
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vec4 tempMax = max(o0, o1);
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maxVal = mix(maxVal, max(maxVal, tempMax), weight);
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}
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}
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gl_FragColor = vec4(maxVal.rgb, c.a);
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}
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