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Don't use lookup tables. It's better to use CPU registers and reduce memory accesses.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3909 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Nolan Check
2009-07-30 20:29:52 +00:00
parent dcae5938c9
commit 8ab4814d73
8 changed files with 58 additions and 108 deletions
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54
Source/Core/VideoCommon/Src/TextureDecoder.cpp
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@ -150,16 +150,6 @@ int TexDecoder_GetPaletteSize(int format)
}
}
inline u32 decode565(u16 val)
{
int r,g,b,a;
r=lut5to8[(val>>11) & 0x1f];
g=lut6to8[(val>>5 ) & 0x3f];
b=lut5to8[(val ) & 0x1f];
a=0xFF;
return (a << 24) | (r << 16) | (g << 8) | b;
}
inline u32 decodeIA8(u16 val)
{
int a = val >> 8;
@ -172,17 +162,17 @@ inline u32 decode5A3(u16 val)
int r,g,b,a;
if ((val & 0x8000))
{
r=lut5to8[(val >> 10) & 0x1f];
g=lut5to8[(val >> 5 ) & 0x1f];
b=lut5to8[(val ) & 0x1f];
a=0xFF;
a = 0xFF;
r = Convert5To8((val >> 10) & 0x1F);
g = Convert5To8((val >> 5) & 0x1F);
b = Convert5To8(val & 0x1F);
}
else
{
a=lut3to8[(val >> 12) & 0x7];
r=lut4to8[(val >> 8 ) & 0xf];
g=lut4to8[(val >> 4 ) & 0xf];
b=lut4to8[(val ) & 0xf];
a = Convert3To8((val >> 12) & 0x7);
r = Convert4To8((val >> 8) & 0xF);
g = Convert4To8((val >> 4) & 0xF);
b = Convert4To8(val & 0xF);
}
return (a << 24) | (r << 16) | (g << 8) | b;
}
@ -263,13 +253,13 @@ inline void decodebytesC14X2_To_Raw16(u16* dst, const u16* src, int tlutaddr)
//inline void decodebytesIA4(u16 *dst, const u8 *src, int numbytes)
inline void decodebytesIA4(u16 *dst, const u8 *src)
{
for (int x = 0; x < 8; x++)
{
for (int x = 0; x < 8; x++)
{
const u8 val = src[x];
const u8 a = lut4to8[val >> 4];
const u8 l = lut4to8[val & 0xF];
dst[x] = (a << 8) | l;
}
u8 a = Convert4To8(val >> 4);
u8 l = Convert4To8(val & 0xF);
dst[x] = (a << 8) | l;
}
}
//inline void decodebytesRGB5A3(u32 *dst, const u16 *src, int numpixels)
@ -305,12 +295,12 @@ void decodeDXTBlock(u32 *dst, const DXTBlock *src, int pitch)
// S3TC Decoder (Note: GCN decodes differently from PC)
u16 c1 = Common::swap16(src->color1);
u16 c2 = Common::swap16(src->color2);
int blue1 = lut5to8[c1 & 0x1F];
int blue2 = lut5to8[c2 & 0x1F];
int green1 = lut6to8[(c1 >> 5) & 0x3F];
int green2 = lut6to8[(c2 >> 5) & 0x3F];
int red1 = lut5to8[(c1 >> 11) & 0x1F];
int red2 = lut5to8[(c2 >> 11) & 0x1F];
u8 blue1 = Convert5To8(c1 & 0x1F);
u8 blue2 = Convert5To8(c2 & 0x1F);
u8 green1 = Convert6To8((c1 >> 5) & 0x3F);
u8 green2 = Convert6To8((c2 >> 5) & 0x3F);
u8 red1 = Convert5To8((c1 >> 11) & 0x1F);
u8 red2 = Convert5To8((c2 >> 11) & 0x1F);
int colors[4];
@ -402,8 +392,8 @@ PC_TexFormat TexDecoder_Decode_real(u8 *dst, const u8 *src, int width, int heigh
for (int ix = 0; ix < 4; ix++)
{
int val = src[ix];
dst[(y + iy) * width + x + ix * 2] = lut4to8[val >> 4];
dst[(y + iy) * width + x + ix * 2 + 1] = lut4to8[val & 15];
dst[(y + iy) * width + x + ix * 2] = Convert4To8(val >> 4);
dst[(y + iy) * width + x + ix * 2 + 1] = Convert4To8(val & 0xF);
}
}
return PC_TEX_FMT_I4_AS_I8;