mirror of https://github.com/ZDoom/gzdoom-gles.git
39 lines
876 B
GLSL
39 lines
876 B
GLSL
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in vec2 TexCoord;
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out vec4 FragColor;
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uniform sampler2D AODepthTexture;
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#if defined(MULTISAMPLE)
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uniform sampler2DMS SceneFogTexture;
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uniform int SampleCount;
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#else
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uniform sampler2D SceneFogTexture;
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#endif
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uniform vec2 Scale;
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uniform vec2 Offset;
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void main()
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{
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vec2 uv = Offset + TexCoord * Scale;
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#if defined(MULTISAMPLE)
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ivec2 texSize = textureSize(SceneFogTexture);
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#else
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ivec2 texSize = textureSize(SceneFogTexture, 0);
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#endif
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ivec2 ipos = ivec2(max(floor(uv * vec2(texSize) - 0.75), vec2(0.0)));
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#if defined(MULTISAMPLE)
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vec3 fogColor = vec3(0.0);
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for (int i = 0; i < SampleCount; i++)
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fogColor += texelFetch(SceneFogTexture, ipos, i).rgb;
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fogColor /= float(SampleCount);
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#else
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vec3 fogColor = texelFetch(SceneFogTexture, ipos, 0).rgb;
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#endif
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float attenutation = texture(AODepthTexture, TexCoord).x;
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FragColor = vec4(fogColor, 1.0 - attenutation);
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}
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