30 lines
1 KiB
GLSL
30 lines
1 KiB
GLSL
#version 450 core
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//! type fragment
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layout( location = 0 ) uniform sampler2D u_InputTexture;
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layout( location = 1 ) uniform vec2 u_OutputSize;
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layout( location = 2 ) uniform int u_SourceLOD;
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layout( location = 3 ) uniform vec2 u_Direction;
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layout( location = 4 ) uniform vec4 u_Weights;
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layout( location = 0 ) out vec3 color;
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void main( void )
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{
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vec2 tmp = gl_FragCoord.xy / u_OutputSize;
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vec2 disp = u_Direction / u_OutputSize;
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float wt = u_Weights.x + u_Weights.y * 2 + u_Weights.z * 2 + u_Weights.w * 2;
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color = u_Weights.x * textureLod( u_InputTexture , tmp , u_SourceLOD ).xyz
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+ u_Weights.y * (
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textureLod( u_InputTexture , tmp + disp , u_SourceLOD ).xyz
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+ textureLod( u_InputTexture , tmp - disp , u_SourceLOD ).xyz )
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+ u_Weights.z * (
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textureLod( u_InputTexture , tmp + disp * 2 , u_SourceLOD ).xyz
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+ textureLod( u_InputTexture , tmp - disp * 2 , u_SourceLOD ).xyz )
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+ u_Weights.w * (
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textureLod( u_InputTexture , tmp + disp * 3 , u_SourceLOD ).xyz
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+ textureLod( u_InputTexture , tmp - disp * 3 , u_SourceLOD ).xyz )
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;
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color /= wt;
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}
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