17 lines
449 B
Text
17 lines
449 B
Text
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#version 450 core
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layout( location = 0 ) uniform sampler2D u_InputTexture;
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layout( location = 1 ) uniform int u_LOD;
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layout( location = 2 ) uniform vec2 u_OutputSize;
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layout( location = 0 ) out vec4 o_Color;
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void main( void )
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{
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vec2 ts = textureSize( u_InputTexture , u_LOD );
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ivec2 pos = ivec2( ts * gl_FragCoord.xy / u_OutputSize );
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vec3 c = vec3( texelFetch( u_InputTexture , pos , u_LOD ).r );
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o_Color = vec4( 1 - c / ( c + 1 ) , 1 );
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}
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