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PixelShaderGen: Use integer math for alpha testing.

This commit is contained in:
Tony Wasserka 2013-08-14 15:06:47 +02:00
parent 22c989de9a
commit fa77e1d2b6
2 changed files with 18 additions and 17 deletions
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3
Source/Core/VideoBackends/OGL/ProgramShaderCache.cpp
View File

@ -463,6 +463,9 @@ void ProgramShaderCache::CreateHeader ( void )
"#define float2 vec2\n"
"#define float3 vec3\n"
"#define float4 vec4\n"
"#define uint2 uvec2\n"
"#define uint3 uvec3\n"
"#define uint4 uvec4\n"
"#define int2 ivec2\n"
"#define int3 ivec3\n"
"#define int4 ivec4\n"

32
Source/Core/VideoCommon/PixelShaderGen.cpp
View File

@ -541,9 +541,7 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
RegisterStates[0].AlphaNeedOverflowControl = RegisterStates[bpmem.combiners[numStages - 1].alphaC.dest].AlphaNeedOverflowControl;
}
}
// emulation of unsigned 8 overflow when casting if needed
if (RegisterStates[0].AlphaNeedOverflowControl || RegisterStates[0].ColorNeedOverflowControl)
out.Write("\tprev = frac(prev * (255.0/256.0)) * (256.0/255.0);\n");
out.Write("\tint4 iprev = int4(round(prev * 255.0)) & 0xFF;\n");
AlphaTest::TEST_RESULT Pretest = bpmem.alpha_test.TestResult();
uid_data.Pretest = Pretest;
@ -602,12 +600,12 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
if (dstAlphaMode == DSTALPHA_ALPHA_PASS)
{
out.SetConstantsUsed(C_ALPHA, C_ALPHA);
out.Write("\tocol0 = float4(prev.rgb, " I_ALPHA"[0].a);\n");
out.Write("\tocol0 = float4(float3(iprev.rgb) / 255.0, " I_ALPHA"[0].a);\n");
}
else
{
WriteFog<T>(out, uid_data);
out.Write("\tocol0 = prev;\n");
out.Write("\tocol0 = float4(iprev) / 255.0;\n");
}
// Use dual-source color blending to perform dst alpha in a single pass
@ -617,7 +615,7 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
// Colors will be blended against the alpha from ocol1 and
// the alpha from ocol0 will be written to the framebuffer.
out.Write("\tocol1 = prev;\n");
out.Write("\tocol1 = float4(iprev) / 255.0;\n");
out.Write("\tocol0.a = " I_ALPHA"[0].a;\n");
}
@ -1065,14 +1063,14 @@ static inline void SampleTexture(T& out, const char *texcoords, const char *texs
static const char *tevAlphaFuncsTable[] =
{
"(false)", // NEVER
"(prev.a <= %s - (0.25/255.0))", // LESS
"(abs( prev.a - %s ) < (0.5/255.0))", // EQUAL
"(prev.a < %s + (0.25/255.0))", // LEQUAL
"(prev.a >= %s + (0.25/255.0))", // GREATER
"(abs( prev.a - %s ) >= (0.5/255.0))", // NEQUAL
"(prev.a > %s - (0.25/255.0))", // GEQUAL
"(true)" // ALWAYS
"(false)", // NEVER
"(iprev.a < %s)", // LESS
"(iprev.a == %s)", // EQUAL
"(iprev.a <= %s)", // LEQUAL
"(iprev.a > %s)", // GREATER
"(iprev.a != %s)", // NEQUAL
"(iprev.a >= %s)", // GEQUAL
"(true)" // ALWAYS
};
static const char *tevAlphaFunclogicTable[] =
@ -1088,8 +1086,8 @@ static inline void WriteAlphaTest(T& out, pixel_shader_uid_data& uid_data, API_T
{
static const char *alphaRef[2] =
{
I_ALPHA"[0].r",
I_ALPHA"[0].g"
"int(round(" I_ALPHA"[0].r * 255.0))",
"int(round(" I_ALPHA"[0].g * 255.0))"
};
out.SetConstantsUsed(C_ALPHA, C_ALPHA);
@ -1200,7 +1198,7 @@ static inline void WriteFog(T& out, pixel_shader_uid_data& uid_data)
WARN_LOG(VIDEO, "Unknown Fog Type! %08x", bpmem.fog.c_proj_fsel.fsel);
}
out.Write("\tprev.rgb = lerp(prev.rgb, " I_FOG"[0].rgb, fog);\n");
out.Write("\tiprev.rgb = int3(round(lerp(float3(iprev.rgb), " I_FOG"[0].rgb*255.0, fog)));\n");
}
void GetPixelShaderUid(PixelShaderUid& object, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components)