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Latte: Handle edge cases in texture hashing for 16-byte compressed texture formats (#2051)
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This commit is contained in:
Lain
2026-09-19 05:39:54 +02:00
committed by GitHub
parent 3310f3b8b1
commit 54ffbed26a
1 changed files with 27 additions and 8 deletions
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35
src/Cafe/HW/Latte/Core/LatteTextureCache.cpp
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@@ -22,7 +22,7 @@ void LatteTC_UnregisterTexture(LatteTexture* tex)
}
// sample few uint64s uniformly over memory range
uint32 _quickStochasticHash(void* texData, uint32 memRange)
uint32 _quickStochasticHash(void* texData, uint32 memRange, bool is16ByteFormat)
{
uint64* texDataU64 = (uint64*)texData;
@@ -30,11 +30,25 @@ uint32 _quickStochasticHash(void* texData, uint32 memRange)
memRange /= sizeof(uint64);
uint32 memStep = memRange / 37; // use prime here to avoid memStep aligning nicely with pitch of texture, leading to sampling only along the border of a texture
for (sint32 i = 0; i < 37; i++)
if (!is16ByteFormat)
{
hashVal += *texDataU64;
hashVal = (hashVal << 3) | (hashVal >> 61);
texDataU64 += memStep;
for (sint32 i = 0; i < 37; i++)
{
hashVal += *texDataU64;
hashVal = (hashVal << 3) | (hashVal >> 61);
texDataU64 += memStep;
}
}
else
{
for (sint32 i = 0; i < 37; i++)
{
hashVal += *texDataU64 ^ *(texDataU64 + 1);
hashVal = (hashVal << 3) | (hashVal >> 61);
texDataU64 += memStep;
}
}
return (uint32)hashVal ^ (uint32)(hashVal >> 32);
}
@@ -84,7 +98,12 @@ uint32 LatteTexture_CalculateTextureDataHash(LatteTexture* hostTexture)
}
else
{
hashVal = _quickStochasticHash(texDataU32, memRange);
bool is16ByteFormat = (hostTexture->format == Latte::E_GX2SURFFMT::BC2_UNORM ||
hostTexture->format == Latte::E_GX2SURFFMT::BC2_SRGB ||
hostTexture->format == Latte::E_GX2SURFFMT::BC3_UNORM ||
hostTexture->format == Latte::E_GX2SURFFMT::BC3_SRGB);
hashVal = _quickStochasticHash(texDataU32, memRange, is16ByteFormat);
}
return hashVal;
}
@@ -212,7 +231,7 @@ bool LatteTC_HasTextureChanged(LatteTexture* hostTexture, bool force)
return false;
hostTexture->lastDataUpdateFrameCounter = LatteGPUState.frameCounter;
// we assume that certain texture properties indicate that the texture will never be written by the CPU
if (hostTexture->width == 1280 && hostTexture->format != Latte::E_GX2SURFFMT::R8_UNORM && force == false)
if (hostTexture->width == 1280 && hostTexture->format != Latte::E_GX2SURFFMT::R8_UNORM && hostTexture->format != Latte::E_GX2SURFFMT::BC3_UNORM && force == false)
{
// todo - remove this or find a better way to handle excluded texture invalidation checks (maybe via game profile?)
return false;
@@ -439,4 +458,4 @@ void LatteTC_UnloadAllTextures()
LatteTexture_Delete(itr);
}
LatteRenderTarget_unloadAll();
}
}