libretro/slang-shaders
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Update ddt.slang

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* Implemented Fallback to Bilinear controlled by user param.

* At its default value it gets rid of most ddt artifacts by falling back to relied bilinear filtering.

* At value 1.0, it behaves as original DDT shader.
This commit is contained in:
Hyllian 2024-04-05 15:22:30 -03:00
parent dd228b941b
commit 2ac8ca7c1b
1 changed files with 56 additions and 46 deletions
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102
edge-smoothing/ddt/shaders/ddt.slang
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@ -3,7 +3,7 @@
/*
Hyllian's DDT Shader
Copyright (C) 2011-2016 Hyllian/Jararaca - sergiogdb@gmail.com
Copyright (C) 2011-2024 Hyllian/Jararaca - sergiogdb@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
@ -26,15 +26,20 @@
layout(push_constant) uniform Push
{
vec4 SourceSize;
vec4 OriginalSize;
vec4 OutputSize;
uint FrameCount;
vec4 SourceSize;
vec4 OriginalSize;
vec4 OutputSize;
uint FrameCount;
float BIL_FALLBACK;
} params;
#pragma parameter BIL_FALLBACK "Bilinear Fallback Threshold" 0.6 0.0 1.0 0.05
#define BIL_FALLBACK params.BIL_FALLBACK
layout(std140, set = 0, binding = 0) uniform UBO
{
mat4 MVP;
mat4 MVP;
} global;
#define saturate(c) clamp(c, 0.0, 1.0)
@ -67,7 +72,7 @@ float luma(float3 color)
float3 bilinear(float p, float q, float3 A, float3 B, float3 C, float3 D)
{
return ((1-p)*(1-q)*A + p*(1-q)*B + (1-p)*q*C + p*q*D);
return ((1-p)*(1-q)*A + p*(1-q)*B + (1-p)*q*C + p*q*D);
}
#pragma stage vertex
@ -83,12 +88,12 @@ void main()
vTexCoord = TexCoord * 1.0001;
float2 ps = float2(params.SourceSize.z, params.SourceSize.w);
float dx = ps.x;
float dy = ps.y;
float dx = ps.x;
float dy = ps.y;
t1.xy = float2( dx, 0); // F
t1.zw = float2( 0, dy); // H
loc = vTexCoord*params.SourceSize.xy;
t1.xy = float2( dx, 0); // F
t1.zw = float2( 0, dy); // H
loc = vTexCoord*params.SourceSize.xy;
}
#pragma stage fragment
@ -101,46 +106,51 @@ layout(set = 0, binding = 2) uniform sampler2D Source;
void main()
{
float2 pos = frac(loc)-float2(0.5, 0.5); // pos = pixel position
float2 dir = sign(pos); // dir = pixel direction
float2 dir = sign(pos); // dir = pixel direction
float2 g1 = dir*t1.xy;
float2 g2 = dir*t1.zw;
float2 g1 = dir*t1.xy;
float2 g2 = dir*t1.zw;
float3 A = tex2D(decal, vTexCoord ).xyz;
float3 B = tex2D(decal, vTexCoord +g1 ).xyz;
float3 C = tex2D(decal, vTexCoord +g2).xyz;
float3 D = tex2D(decal, vTexCoord +g1+g2).xyz;
float3 A = tex2D(decal, vTexCoord ).xyz;
float3 B = tex2D(decal, vTexCoord +g1 ).xyz;
float3 C = tex2D(decal, vTexCoord +g2).xyz;
float3 D = tex2D(decal, vTexCoord +g1+g2).xyz;
float a = luma(A);
float b = luma(B);
float c = luma(C);
float d = luma(D);
float a = luma(A);
float b = luma(B);
float c = luma(C);
float d = luma(D);
float p = abs(pos.x);
float q = abs(pos.y);
float p = abs(pos.x);
float q = abs(pos.y);
float k = distance(pos,g1 * params.SourceSize.xy);
float l = distance(pos,g2 * params.SourceSize.xy);
float k = distance(pos,g1 * params.SourceSize.xy);
float l = distance(pos,g2 * params.SourceSize.xy);
float wd1 = abs(a-d);
float wd2 = abs(b-c);
float wd1 = abs(a-d);
float wd2 = abs(b-c);
if ( wd1 < wd2 )
{
if (k < l)
{
C = A + D - B;
}
else
{
B = A + D - C;
}
}
else if (wd1 > wd2)
{
D = B + C - A;
}
float3 color = bilinear(p, q, A, B, C, D);
float3 color = bilinear(p, q, A, B, C, D);
FragColor = vec4(color, 1.0);
if ( wd1 < wd2 )
{
if (k < l)
{
C = A + D - B;
}
else
{
B = A + D - C;
}
}
else if (wd1 > wd2)
{
D = B + C - A;
}
float3 ddt = bilinear(p, q, A, B, C, D);
color = mix(color, ddt, smoothstep(0.0, BIL_FALLBACK, abs(wd2-wd1)));
FragColor = vec4(color, 1.0);
}