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GS: Drop alpha gather from FXAA 

It's not used by any backends.
This commit is contained in:
Stenzek 2023-07-29 14:18:55 +10:00 committed by Connor McLaughlin
parent ff9ca059c7
commit 784264eba4
2 changed files with 0 additions and 40 deletions
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33
bin/resources/shaders/common/fxaa.fx
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@ -72,12 +72,6 @@ static constexpr sampler MAIN_SAMPLER(coord::normalized, address::clamp_to_edge,
[FXAA CODE SECTION]
------------------------------------------------------------------------------*/
// We don't use gather4 for alpha/luminance because it would require an additional
// pass to compute the values, which would be slower than the extra shader loads.
#if (FXAA_HLSL_5 == 1 || FXAA_GLSL_130 == 1 || FXAA_GLSL_VK == 1) || !defined(__METAL_VERSION__)
#define FXAA_GATHER4_ALPHA 0
#endif
#if (FXAA_HLSL_5 == 1)
struct FxaaTex { SamplerState smpl; Texture2D tex; };
#define FxaaTexTop(t, p) t.tex.SampleLevel(t.smpl, p, 0.0)
@ -98,12 +92,6 @@ struct FxaaTex { SamplerState smpl; Texture2D tex; };
#define FxaaTexTop(t, p) textureLod(t, p, 0.0)
#define FxaaTexOff(t, p, o, r) textureLodOffset(t, p, 0.0, o)
#if (FXAA_GATHER4_ALPHA == 1)
// use #extension GL_ARB_gpu_shader5 : enable
#define FxaaTexAlpha4(t, p) textureGather(t, p, 3)
#define FxaaTexOffAlpha4(t, p, o) textureGatherOffset(t, p, o, 3)
#endif
#elif defined(__METAL_VERSION__)
#define FxaaTex texture2d<float>
#define FxaaTexTop(t, p) t.sample(MAIN_SAMPLER, p)
@ -192,21 +180,6 @@ float4 FxaaPixelShader(float2 pos, FxaaTex tex, float2 fxaaRcpFrame, float fxaaS
posM.x = pos.x;
posM.y = pos.y;
#if (FXAA_GATHER4_ALPHA == 1)
float4 rgbyM = FxaaTexTop(tex, posM);
float4 luma4A = FxaaTexAlpha4(tex, posM);
float4 luma4B = FxaaTexOffAlpha4(tex, posM, int2(-1, -1));
rgbyM.w = RGBLuminance(rgbyM.xyz);
#define lumaM rgbyM.w
#define lumaE luma4A.z
#define lumaS luma4A.x
#define lumaSE luma4A.y
#define lumaNW luma4B.w
#define lumaN luma4B.z
#define lumaW luma4B.x
#else
float4 rgbyM = FxaaTexTop(tex, posM);
rgbyM.w = RGBLuminance(rgbyM.xyz);
#define lumaM rgbyM.w
@ -215,7 +188,6 @@ float4 FxaaPixelShader(float2 pos, FxaaTex tex, float2 fxaaRcpFrame, float fxaaS
float lumaE = FxaaLuma(FxaaTexOff(tex, posM, int2( 1, 0), fxaaRcpFrame.xy));
float lumaN = FxaaLuma(FxaaTexOff(tex, posM, int2( 0,-1), fxaaRcpFrame.xy));
float lumaW = FxaaLuma(FxaaTexOff(tex, posM, int2(-1, 0), fxaaRcpFrame.xy));
#endif
float maxSM = max(lumaS, lumaM);
float minSM = min(lumaS, lumaM);
@ -235,15 +207,10 @@ float4 FxaaPixelShader(float2 pos, FxaaTex tex, float2 fxaaRcpFrame, float fxaaS
if(earlyExit) { return rgbyM; }
#endif
#if (FXAA_GATHER4_ALPHA == 0)
float lumaNW = FxaaLuma(FxaaTexOff(tex, posM, int2(-1,-1), fxaaRcpFrame.xy));
float lumaSE = FxaaLuma(FxaaTexOff(tex, posM, int2( 1, 1), fxaaRcpFrame.xy));
float lumaNE = FxaaLuma(FxaaTexOff(tex, posM, int2( 1,-1), fxaaRcpFrame.xy));
float lumaSW = FxaaLuma(FxaaTexOff(tex, posM, int2(-1, 1), fxaaRcpFrame.xy));
#else
float lumaNE = FxaaLuma(FxaaTexOff(tex, posM, int2( 1,-1), fxaaRcpFrame.xy));
float lumaSW = FxaaLuma(FxaaTexOff(tex, posM, int2(-1, 1), fxaaRcpFrame.xy));
#endif
float lumaNS = lumaN + lumaS;
float lumaWE = lumaW + lumaE;

7
pcsx2/GS/Renderers/OpenGL/GSDeviceOGL.cpp
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@ -1794,13 +1794,6 @@ void GSDeviceOGL::DoInterlace(GSTexture* sTex, const GSVector4& sRect, GSTexture
bool GSDeviceOGL::CompileFXAAProgram()
{
// Needs ARB_gpu_shader5 for gather.
if (!GLAD_GL_ARB_gpu_shader5)
{
Console.Warning("FXAA is not supported with the current GPU");
return true;
}
const std::string_view fxaa_macro = "#define FXAA_GLSL_130 1\n";
std::optional<std::string> shader = Host::ReadResourceFileToString("shaders/common/fxaa.fx");
if (!shader.has_value())