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use feedback in crt-guest to smooth bloom transitions

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hunterk 2019-01-16 16:21:29 -06:00
parent 6ffa629671
commit ea23a0ab49
1 changed files with 9 additions and 1 deletions
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10
crt/shaders/guest/avg-lum.slang
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@ -29,8 +29,11 @@ layout(push_constant) uniform Push
vec4 OutputSize;
uint FrameCount;
float grade;
float mixfactor;
} params;
#pragma parameter mixfactor "Motionblur Fadeout" 0.75 0.0 1.0 0.01
#pragma parameter grade "Blooming grade" 0.70 0.10 1.0 0.05
layout(std140, set = 0, binding = 0) uniform UBO
@ -53,12 +56,17 @@ void main()
layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D Source;
layout(set = 0, binding = 3) uniform sampler2D PassFeedback3;
void main()
{
float mip_level = max(log2(params.SourceSize.x), log2(params.SourceSize.y));
vec4 current = pow(textureLod(Source, vTexCoord, 8), vec4(2.2));
vec4 fdback = pow(textureLod(PassFeedback3, vTexCoord, 8), vec4(2.2));
vec4 mixed = (1.0 - params.mixfactor) * current + params.mixfactor * fdback;
mixed = pow(mixed, vec4(1.0 / 2.2));
float black_compensation = (params.SourceSize.x*params.SourceSize.y)/(params.SourceSize.x*params.SourceSize.y);
float lum = length(textureLod(Source, vTexCoord.xy, mip_level).rgb * black_compensation);
float lum = length(mixed.rgb * black_compensation);
lum = lum * inversesqrt(3.0);
FragColor = vec4(pow(lum, params.grade));
}