63 lines
1.5 KiB
Text
63 lines
1.5 KiB
Text
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//! type chunk
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//#define DOF_USE_RANDOM
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layout( location = 0 ) uniform sampler2D u_Input;
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layout( location = 2 ) uniform vec4 u_Parameters;
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layout( location = 3 ) uniform float u_Samples;
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layout( location = 4 ) uniform vec3 u_ResolutionTime;
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#define uSharpDist (u_Parameters.x)
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#define uSharpRange (u_Parameters.y)
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#define uBlurFalloff (u_Parameters.z)
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#define uMaxBlur (u_Parameters.w)
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#define uResolution (u_ResolutionTime.xy)
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#define uTime (u_ResolutionTime.z)
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layout( binding = 0 , rgba16f ) writeonly uniform image2D u_Output;
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//!include lib/utils.glsl
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float DOF_CoC(
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in float z )
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{
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return uMaxBlur * min( 1 ,
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max( 0 , abs( z - uSharpDist ) - uSharpRange ) / uBlurFalloff );
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}
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// z: z at UV
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// coc: blur radius at UV
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// uv: initial coordinate
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// blurvec: smudge direction
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vec3 DOF_Blur(
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in float z ,
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in float coc ,
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in vec2 uv ,
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in vec2 blurvec )
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{
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vec3 sumcol = vec3( 0. );
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for ( int i = 0 ; i < u_Samples ; i++ ) {
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float r = i;
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#ifdef DOF_USE_RANDOM
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r += M_Hash( uv + float( i + uTime ) ) - .5;
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#endif
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r = r / float( u_Samples - 1 ) - .5;
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vec2 p = uv + r * coc * blurvec;
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vec4 d = textureLod( u_Input , p , 0 );
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vec3 smpl = d.xyz;
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float sz = d.w;
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if ( sz < z ) {
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// if sample is closer consider it's CoC
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p = uv + r * min( coc , DOF_CoC( sz ) ) * blurvec;
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p = uv + r * DOF_CoC( sz ) * blurvec;
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smpl = textureLod( u_Input , p , 0 ).xyz;
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}
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sumcol += smpl;
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}
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sumcol /= float( u_Samples );
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sumcol = max( sumcol , 0. );
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return sumcol;
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}
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