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emulate unsupported shadow sampler types

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This commit is contained in:
Samo Z 2024-09-01 14:36:39 +02:00
parent f9f6260580
commit 5d07d115a6
3 changed files with 55 additions and 17 deletions
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59
src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp
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@ -2246,6 +2246,7 @@ static void _emitTEXSampleTextureCode(LatteDecompilerShaderContext* shaderContex
}
bool isCompare = shaderContext->shader->textureUsesDepthCompare[texInstruction->textureFetch.textureIndex];
bool emulateCompare = (isCompare && !IsValidDepthTextureType(texDim));
bool isGather = (texOpcode == GPU7_TEX_INST_FETCH4);
bool unnormalizationHandled = false;
@ -2265,25 +2266,40 @@ static void _emitTEXSampleTextureCode(LatteDecompilerShaderContext* shaderContex
return;
}
src->addFmt("tex{}.", texInstruction->textureFetch.textureIndex);
if ((texOpcode == GPU7_TEX_INST_SAMPLE && (texInstruction->textureFetch.unnormalized[0] && texInstruction->textureFetch.unnormalized[1] && texInstruction->textureFetch.unnormalized[2] && texInstruction->textureFetch.unnormalized[3])) ||
texOpcode == GPU7_TEX_INST_LD)
if (emulateCompare)
{
if (hasOffset)
cemu_assert_unimplemented();
src->add("read(");
unnormalizationHandled = true;
useTexelCoordinates = true;
cemu_assert_debug(!isGather);
src->add("sampleCompareEmulate(");
}
src->addFmt("tex{}", texInstruction->textureFetch.textureIndex);
if (!emulateCompare)
{
src->add(".");
if ((texOpcode == GPU7_TEX_INST_SAMPLE && (texInstruction->textureFetch.unnormalized[0] && texInstruction->textureFetch.unnormalized[1] && texInstruction->textureFetch.unnormalized[2] && texInstruction->textureFetch.unnormalized[3])) ||
texOpcode == GPU7_TEX_INST_LD)
{
if (hasOffset)
cemu_assert_unimplemented();
src->add("read(");
unnormalizationHandled = true;
useTexelCoordinates = true;
}
else
{
if (isGather)
src->add("gather");
else
src->add("sample");
if (isCompare)
src->add("_compare");
src->addFmt("(samplr{}, ", texInstruction->textureFetch.textureIndex);
}
}
else
{
if (isGather)
src->add("gather");
else
src->add("sample");
if (isCompare)
src->add("_compare");
src->addFmt("(samplr{}, ", texInstruction->textureFetch.textureIndex);
src->addFmt(", samplr{}, ", texInstruction->textureFetch.textureIndex);
}
// for textureGather() add shift (todo: depends on rounding mode set in sampler registers?)
@ -3719,6 +3735,19 @@ void LatteDecompiler_emitHelperFunctions(LatteDecompilerShaderContext* shaderCon
"}\r\n");
}
// Sample compare emulate
// TODO: only add when needed
// TODO: lod_options overload
// TODO: when the sampler has linear min mag filter, use gather and filter manually
// TODO: offset?
fCStr_shaderSource->add(""
"template<typename TextureT, typename CoordT>\r\n"
"float sampleCompareEmulate(TextureT tex, sampler samplr, CoordT coord, float compareValue) {\r\n"
"return compareValue < tex.sample(samplr, coord).x ? 1.0 : 0.0;\r\n"
"}\r\n"
);
// clamp
fCStr_shaderSource->add(""
"int clampFI32(int v)\r\n"