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| | | #ifndef __BLOOM__ |
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| | | #define __BLOOM__ |
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| | | |
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| | | #include "Common.cginc" |
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| | | |
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| | | // Brightness function |
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| | | half Brightness(half3 c) |
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| | | { |
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| | | return Max3(c); |
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| | | } |
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| | | |
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| | | // 3-tap median filter |
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| | | half3 Median(half3 a, half3 b, half3 c) |
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| | | { |
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| | | return a + b + c - min(min(a, b), c) - max(max(a, b), c); |
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| | | } |
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| | | |
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| | | // Downsample with a 4x4 box filter |
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| | | half3 DownsampleFilter(sampler2D tex, float2 uv, float2 texelSize) |
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| | | { |
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0); |
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| | | |
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| | | half3 s; |
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| | | s = DecodeHDR(tex2D(tex, uv + d.xy)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw)); |
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| | | |
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| | | return s * (1.0 / 4.0); |
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| | | } |
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| | | |
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| | | // Downsample with a 4x4 box filter + anti-flicker filter |
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| | | half3 DownsampleAntiFlickerFilter(sampler2D tex, float2 uv, float2 texelSize) |
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| | | { |
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0); |
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| | | |
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| | | half3 s1 = DecodeHDR(tex2D(tex, uv + d.xy)); |
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| | | half3 s2 = DecodeHDR(tex2D(tex, uv + d.zy)); |
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| | | half3 s3 = DecodeHDR(tex2D(tex, uv + d.xw)); |
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| | | half3 s4 = DecodeHDR(tex2D(tex, uv + d.zw)); |
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| | | |
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| | | // Karis's luma weighted average (using brightness instead of luma) |
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| | | half s1w = 1.0 / (Brightness(s1) + 1.0); |
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| | | half s2w = 1.0 / (Brightness(s2) + 1.0); |
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| | | half s3w = 1.0 / (Brightness(s3) + 1.0); |
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| | | half s4w = 1.0 / (Brightness(s4) + 1.0); |
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| | | half one_div_wsum = 1.0 / (s1w + s2w + s3w + s4w); |
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| | | |
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| | | return (s1 * s1w + s2 * s2w + s3 * s3w + s4 * s4w) * one_div_wsum; |
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| | | } |
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| | | |
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| | | half3 UpsampleFilter(sampler2D tex, float2 uv, float2 texelSize, float sampleScale) |
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| | | { |
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| | | #if MOBILE_OR_CONSOLE |
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| | | // 4-tap bilinear upsampler |
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0) * (sampleScale * 0.5); |
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| | | |
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| | | half3 s; |
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| | | s = DecodeHDR(tex2D(tex, uv + d.xy)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw)); |
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| | | |
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| | | return s * (1.0 / 4.0); |
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| | | #else |
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| | | // 9-tap bilinear upsampler (tent filter) |
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| | | float4 d = texelSize.xyxy * float4(1.0, 1.0, -1.0, 0.0) * sampleScale; |
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| | | |
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| | | half3 s; |
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| | | s = DecodeHDR(tex2D(tex, uv - d.xy)); |
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| | | s += DecodeHDR(tex2D(tex, uv - d.wy)) * 2.0; |
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| | | s += DecodeHDR(tex2D(tex, uv - d.zy)); |
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| | | |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw)) * 2.0; |
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| | | s += DecodeHDR(tex2D(tex, uv)) * 4.0; |
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw)) * 2.0; |
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| | | |
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy)); |
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| | | s += DecodeHDR(tex2D(tex, uv + d.wy)) * 2.0; |
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| | | s += DecodeHDR(tex2D(tex, uv + d.xy)); |
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| | | |
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| | | return s * (1.0 / 16.0); |
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| | | #endif |
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| | | } |
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| | | |
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| | | #endif // __BLOOM__ |
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| | | #ifndef __BLOOM__
|
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| | | #define __BLOOM__
|
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| | |
|
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| | | #include "Common.cginc"
|
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| | |
|
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| | | // Brightness function
|
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| | | half Brightness(half3 c)
|
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| | | {
|
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| | | return Max3(c);
|
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| | | }
|
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| | |
|
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| | | // 3-tap median filter
|
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| | | half3 Median(half3 a, half3 b, half3 c)
|
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| | | {
|
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| | | return a + b + c - min(min(a, b), c) - max(max(a, b), c);
|
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| | | }
|
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| | |
|
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| | | // Downsample with a 4x4 box filter
|
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| | | half3 DownsampleFilter(sampler2D tex, float2 uv, float2 texelSize)
|
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| | | {
|
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0);
|
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| | |
|
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| | | half3 s;
|
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| | | s = DecodeHDR(tex2D(tex, uv + d.xy));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw));
|
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| | |
|
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| | | return s * (1.0 / 4.0);
|
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| | | }
|
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| | |
|
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| | | // Downsample with a 4x4 box filter + anti-flicker filter
|
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| | | half3 DownsampleAntiFlickerFilter(sampler2D tex, float2 uv, float2 texelSize)
|
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| | | {
|
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0);
|
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| | |
|
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| | | half3 s1 = DecodeHDR(tex2D(tex, uv + d.xy));
|
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| | | half3 s2 = DecodeHDR(tex2D(tex, uv + d.zy));
|
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| | | half3 s3 = DecodeHDR(tex2D(tex, uv + d.xw));
|
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| | | half3 s4 = DecodeHDR(tex2D(tex, uv + d.zw));
|
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| | |
|
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| | | // Karis's luma weighted average (using brightness instead of luma)
|
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| | | half s1w = 1.0 / (Brightness(s1) + 1.0);
|
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| | | half s2w = 1.0 / (Brightness(s2) + 1.0);
|
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| | | half s3w = 1.0 / (Brightness(s3) + 1.0);
|
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| | | half s4w = 1.0 / (Brightness(s4) + 1.0);
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| | | half one_div_wsum = 1.0 / (s1w + s2w + s3w + s4w);
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| | | return (s1 * s1w + s2 * s2w + s3 * s3w + s4 * s4w) * one_div_wsum;
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| | | }
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| | |
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| | | half3 UpsampleFilter(sampler2D tex, float2 uv, float2 texelSize, float sampleScale)
|
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| | | {
|
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| | | #if MOBILE_OR_CONSOLE
|
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| | | // 4-tap bilinear upsampler
|
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| | | float4 d = texelSize.xyxy * float4(-1.0, -1.0, 1.0, 1.0) * (sampleScale * 0.5);
|
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| | |
|
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| | | half3 s;
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| | | s = DecodeHDR(tex2D(tex, uv + d.xy));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw));
|
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw));
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| | | return s * (1.0 / 4.0);
|
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| | | #else
|
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| | | // 9-tap bilinear upsampler (tent filter)
|
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| | | float4 d = texelSize.xyxy * float4(1.0, 1.0, -1.0, 0.0) * sampleScale;
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| | | half3 s;
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| | | s = DecodeHDR(tex2D(tex, uv - d.xy));
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| | | s += DecodeHDR(tex2D(tex, uv - d.wy)) * 2.0;
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| | | s += DecodeHDR(tex2D(tex, uv - d.zy));
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| | | s += DecodeHDR(tex2D(tex, uv + d.zw)) * 2.0;
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| | | s += DecodeHDR(tex2D(tex, uv)) * 4.0;
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| | | s += DecodeHDR(tex2D(tex, uv + d.xw)) * 2.0;
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| | | s += DecodeHDR(tex2D(tex, uv + d.zy));
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| | | s += DecodeHDR(tex2D(tex, uv + d.wy)) * 2.0;
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| | | s += DecodeHDR(tex2D(tex, uv + d.xy));
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| | | return s * (1.0 / 16.0);
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| | | #endif
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| | | }
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| | | #endif // __BLOOM__
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