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Improve the common case of indexed texture reading.

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Cuts from 3.8% to 0.8% in Crimson Gem Saga on Windows.
This commit is contained in:
Unknown W. Brackets 2013-04-13 16:25:26 -07:00
parent 1c17c9138e
commit 6f41255947
1 changed files with 27 additions and 26 deletions
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53
GPU/GLES/TextureCache.cpp
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@ -227,6 +227,23 @@ void *TextureCache::UnswizzleFromMem(u32 texaddr, u32 bytesPerPixel, u32 level)
return tmpTexBuf32.data();
}
template <typename IndexT, typename ClutT>
inline void DeIndexTextureNoSwizzle(ClutT *dest, const u32 texaddr, int length, const ClutT *clut) {
// Usually, there is no special offset, mask, or shift.
const bool nakedIndex = (gstate.clutformat & ~3) == 0xC500FF00;
const IndexT *indexed = (const IndexT *) Memory::GetPointer(texaddr);
if (nakedIndex) {
for (int i = 0; i < length; ++i) {
*dest++ = clut[*indexed++];
}
} else {
for (int i = 0; i < length; ++i) {
*dest++ = clut[GetClutIndex(*indexed++)];
}
}
}
void *TextureCache::readIndexedTex(int level, u32 texaddr, int bytesPerIndex) {
int length = (gstate.texbufwidth[level] & 0x3FF) * (1 << ((gstate.texsize[level] >> 8) & 0xf));
void *buf = NULL;
@ -238,31 +255,22 @@ void *TextureCache::readIndexedTex(int level, u32 texaddr, int bytesPerIndex) {
tmpTexBuf16.resize(length);
tmpTexBufRearrange.resize(length);
ReadClut16(clutBuf16);
const u16 *clut = clutBuf16;
if (!(gstate.texmode & 1)) {
switch (bytesPerIndex) {
case 1:
for (int i = 0; i < length; i++) {
u8 index = Memory::ReadUnchecked_U8(texaddr + i);
tmpTexBuf16[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u8>(tmpTexBuf16.data(), texaddr, length, clutBuf16);
break;
case 2:
for (int i = 0; i < length; i++) {
u16 index = Memory::ReadUnchecked_U16(texaddr + i * 2);
tmpTexBuf16[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u16>(tmpTexBuf16.data(), texaddr, length, clutBuf16);
break;
case 4:
for (int i = 0; i < length; i++) {
u32 index = Memory::ReadUnchecked_U32(texaddr + i * 4);
tmpTexBuf16[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u32>(tmpTexBuf16.data(), texaddr, length, clutBuf16);
break;
}
} else {
const u16 *clut = clutBuf16;
UnswizzleFromMem(texaddr, bytesPerIndex, level);
switch (bytesPerIndex) {
case 1:
@ -298,32 +306,25 @@ void *TextureCache::readIndexedTex(int level, u32 texaddr, int bytesPerIndex) {
case GE_CMODE_32BIT_ABGR8888:
{
tmpTexBuf32.resize(length);
tmpTexBufRearrange.resize(length);
ReadClut32(clutBuf32);
const u32 *clut = clutBuf32;
if (!(gstate.texmode & 1)) {
switch (bytesPerIndex) {
case 1:
for (int i = 0; i < length; i++) {
u8 index = Memory::ReadUnchecked_U8(texaddr + i);
tmpTexBuf32[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u8>(tmpTexBuf32.data(), texaddr, length, clutBuf32);
break;
case 2:
for (int i = 0; i < length; i++) {
u16 index = Memory::ReadUnchecked_U16(texaddr + i * 2);
tmpTexBuf32[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u16>(tmpTexBuf32.data(), texaddr, length, clutBuf32);
break;
case 4:
for (int i = 0; i < length; i++) {
u32 index = Memory::ReadUnchecked_U32(texaddr + i * 4);
tmpTexBuf32[i] = clut[GetClutIndex(index)];
}
DeIndexTextureNoSwizzle<u32>(tmpTexBuf32.data(), texaddr, length, clutBuf32);
break;
}
} else {
const u32 *clut = clutBuf32;
UnswizzleFromMem(texaddr, bytesPerIndex, level);
switch (bytesPerIndex) {
case 1: