/
TextureDecoder_Generic.cpp
2194 lines (2067 loc) · 75.8 KB
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TextureDecoder_Generic.cpp
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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include <cmath>
#include "Common/Common.h"
#include "Common/CPUDetect.h"
#include "VideoCommon/LookUpTables.h"
#include "VideoCommon/TextureDecoder.h"
//#include "VideoCommon/VideoCommon.h" // to get debug logs
#include "VideoCommon/VideoConfig.h"
bool TexFmt_Overlay_Enable=false;
bool TexFmt_Overlay_Center=false;
extern const char* texfmt[];
extern const unsigned char sfont_map[];
extern const unsigned char sfont_raw[][9*10];
// TRAM
// STATE_TO_SAVE
GC_ALIGNED16(u8 texMem[TMEM_SIZE]);
// Gamecube/Wii texture decoder
// Decodes all known Gamecube/Wii texture formats.
// by ector
int TexDecoder_GetTexelSizeInNibbles(int format)
{
switch (format & 0x3f) {
case GX_TF_I4: return 1;
case GX_TF_I8: return 2;
case GX_TF_IA4: return 2;
case GX_TF_IA8: return 4;
case GX_TF_RGB565: return 4;
case GX_TF_RGB5A3: return 4;
case GX_TF_RGBA8: return 8;
case GX_TF_C4: return 1;
case GX_TF_C8: return 2;
case GX_TF_C14X2: return 4;
case GX_TF_CMPR: return 1;
case GX_CTF_R4: return 1;
case GX_CTF_RA4: return 2;
case GX_CTF_RA8: return 4;
case GX_CTF_YUVA8: return 8;
case GX_CTF_A8: return 2;
case GX_CTF_R8: return 2;
case GX_CTF_G8: return 2;
case GX_CTF_B8: return 2;
case GX_CTF_RG8: return 4;
case GX_CTF_GB8: return 4;
case GX_TF_Z8: return 2;
case GX_TF_Z16: return 4;
case GX_TF_Z24X8: return 8;
case GX_CTF_Z4: return 1;
case GX_CTF_Z8M: return 2;
case GX_CTF_Z8L: return 2;
case GX_CTF_Z16L: return 4;
default: return 1;
}
}
int TexDecoder_GetTextureSizeInBytes(int width, int height, int format)
{
return (width * height * TexDecoder_GetTexelSizeInNibbles(format)) / 2;
}
int TexDecoder_GetBlockWidthInTexels(u32 format)
{
switch (format)
{
case GX_TF_I4: return 8;
case GX_TF_I8: return 8;
case GX_TF_IA4: return 8;
case GX_TF_IA8: return 4;
case GX_TF_RGB565: return 4;
case GX_TF_RGB5A3: return 4;
case GX_TF_RGBA8: return 4;
case GX_TF_C4: return 8;
case GX_TF_C8: return 8;
case GX_TF_C14X2: return 4;
case GX_TF_CMPR: return 8;
case GX_CTF_R4: return 8;
case GX_CTF_RA4: return 8;
case GX_CTF_RA8: return 4;
case GX_CTF_A8: return 8;
case GX_CTF_R8: return 8;
case GX_CTF_G8: return 8;
case GX_CTF_B8: return 8;
case GX_CTF_RG8: return 4;
case GX_CTF_GB8: return 4;
case GX_TF_Z8: return 8;
case GX_TF_Z16: return 4;
case GX_TF_Z24X8: return 4;
case GX_CTF_Z4: return 8;
case GX_CTF_Z8M: return 8;
case GX_CTF_Z8L: return 8;
case GX_CTF_Z16L: return 4;
default:
ERROR_LOG(VIDEO, "Unsupported Texture Format (%08x)! (GetBlockWidthInTexels)", format);
return 8;
}
}
int TexDecoder_GetBlockHeightInTexels(u32 format)
{
switch (format)
{
case GX_TF_I4: return 8;
case GX_TF_I8: return 4;
case GX_TF_IA4: return 4;
case GX_TF_IA8: return 4;
case GX_TF_RGB565: return 4;
case GX_TF_RGB5A3: return 4;
case GX_TF_RGBA8: return 4;
case GX_TF_C4: return 8;
case GX_TF_C8: return 4;
case GX_TF_C14X2: return 4;
case GX_TF_CMPR: return 8;
case GX_CTF_R4: return 8;
case GX_CTF_RA4: return 4;
case GX_CTF_RA8: return 4;
case GX_CTF_A8: return 4;
case GX_CTF_R8: return 4;
case GX_CTF_G8: return 4;
case GX_CTF_B8: return 4;
case GX_CTF_RG8: return 4;
case GX_CTF_GB8: return 4;
case GX_TF_Z8: return 4;
case GX_TF_Z16: return 4;
case GX_TF_Z24X8: return 4;
case GX_CTF_Z4: return 8;
case GX_CTF_Z8M: return 4;
case GX_CTF_Z8L: return 4;
case GX_CTF_Z16L: return 4;
default:
ERROR_LOG(VIDEO, "Unsupported Texture Format (%08x)! (GetBlockHeightInTexels)", format);
return 4;
}
}
//returns bytes
int TexDecoder_GetPaletteSize(int format)
{
switch (format)
{
case GX_TF_C4: return 16 * 2;
case GX_TF_C8: return 256 * 2;
case GX_TF_C14X2: return 16384 * 2;
default:
return 0;
}
}
static inline u32 decode5A3(u16 val)
{
int r,g,b,a;
if ((val & 0x8000))
{
a = 0xFF;
r = Convert5To8((val >> 10) & 0x1F);
g = Convert5To8((val >> 5) & 0x1F);
b = Convert5To8(val & 0x1F);
}
else
{
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;
}
static inline u32 decode5A3RGBA(u16 val)
{
int r,g,b,a;
if ((val&0x8000))
{
r=Convert5To8((val>>10) & 0x1f);
g=Convert5To8((val>>5 ) & 0x1f);
b=Convert5To8((val ) & 0x1f);
a=0xFF;
}
else
{
a=Convert3To8((val>>12) & 0x7);
r=Convert4To8((val>>8 ) & 0xf);
g=Convert4To8((val>>4 ) & 0xf);
b=Convert4To8((val ) & 0xf);
}
return r | (g<<8) | (b << 16) | (a << 24);
}
static inline u32 decode565RGBA(u16 val)
{
int r,g,b,a;
r=Convert5To8((val>>11) & 0x1f);
g=Convert6To8((val>>5 ) & 0x3f);
b=Convert5To8((val ) & 0x1f);
a=0xFF;
return r | (g<<8) | (b << 16) | (a << 24);
}
static inline u32 decodeIA8Swapped(u16 val)
{
int a = val & 0xFF;
int i = val >> 8;
return i | (i<<8) | (i<<16) | (a<<24);
}
struct DXTBlock
{
u16 color1;
u16 color2;
u8 lines[4];
};
//inline void decodebytesC4(u32 *dst, const u8 *src, int numbytes, int tlutaddr, int tlutfmt)
inline void decodebytesC4_5A3_To_BGRA32(u32 *dst, const u8 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = decode5A3(Common::swap16(tlut[val >> 4]));
*dst++ = decode5A3(Common::swap16(tlut[val & 0xF]));
}
}
inline void decodebytesC4_5A3_To_rgba32(u32 *dst, const u8 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = decode5A3RGBA(Common::swap16(tlut[val >> 4]));
*dst++ = decode5A3RGBA(Common::swap16(tlut[val & 0xF]));
}
}
inline void decodebytesC4_To_Raw16(u16* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem+tlutaddr);
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = Common::swap16(tlut[val >> 4]);
*dst++ = Common::swap16(tlut[val & 0xF]);
}
}
inline void decodebytesC4IA8_To_RGBA(u32* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem+tlutaddr);
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = decodeIA8Swapped(tlut[val >> 4]);
*dst++ = decodeIA8Swapped(tlut[val & 0xF]);
}
}
inline void decodebytesC4RGB565_To_RGBA(u32* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem+tlutaddr);
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = decode565RGBA(Common::swap16(tlut[val >> 4]));
*dst++ = decode565RGBA(Common::swap16(tlut[val & 0xF]));
}
}
//inline void decodebytesC8(u32 *dst, const u8 *src, int numbytes, int tlutaddr, int tlutfmt)
inline void decodebytesC8_5A3_To_BGRA32(u32 *dst, const u8 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 8; x++)
{
u8 val = src[x];
*dst++ = decode5A3(Common::swap16(tlut[val]));
}
}
inline void decodebytesC8_5A3_To_RGBA32(u32 *dst, const u8 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 8; x++)
{
u8 val = src[x];
*dst++ = decode5A3RGBA(Common::swap16(tlut[val]));
}
}
inline void decodebytesC8_To_Raw16(u16* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 8; x++)
{
u8 val = src[x];
*dst++ = Common::swap16(tlut[val]);
}
}
inline void decodebytesC8IA8_To_RGBA(u32* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 8; x++)
{
*dst++ = decodeIA8Swapped(tlut[src[x]]);
}
}
inline void decodebytesC8RGB565_To_RGBA(u32* dst, const u8* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 8; x++)
{
*dst++ = decode565RGBA(Common::swap16(tlut[src[x]]));
}
}
inline void decodebytesC14X2_5A3_To_BGRA32(u32 *dst, const u16 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = decode5A3(Common::swap16(tlut[(val & 0x3FFF)]));
}
}
inline void decodebytesC14X2_5A3_To_RGBA(u32 *dst, const u16 *src, int tlutaddr)
{
u16 *tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = decode5A3RGBA(Common::swap16(tlut[(val & 0x3FFF)]));
}
}
inline void decodebytesC14X2_To_Raw16(u16* dst, const u16* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = Common::swap16(tlut[(val & 0x3FFF)]);
}
}
inline void decodebytesC14X2IA8_To_RGBA(u32* dst, const u16* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = decodeIA8Swapped(tlut[(val & 0x3FFF)]);
}
}
inline void decodebytesC14X2rgb565_To_RGBA(u32* dst, const u16* src, int tlutaddr)
{
u16* tlut = (u16*)(texMem + tlutaddr);
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = decode565RGBA(Common::swap16(tlut[(val & 0x3FFF)]));
}
}
// Needs more speed.
inline void decodebytesIA4(u16 *dst, const u8 *src)
{
for (int x = 0; x < 8; x++)
{
const u8 val = src[x];
u8 a = Convert4To8(val >> 4);
u8 l = Convert4To8(val & 0xF);
dst[x] = (a << 8) | l;
}
}
inline void decodebytesIA4RGBA(u32 *dst, const u8 *src)
{
for (int x = 0; x < 8; x++)
{
const u8 val = src[x];
u8 a = Convert4To8(val >> 4);
u8 l = Convert4To8(val & 0xF);
dst[x] = (a << 24) | l << 16 | l << 8 | l;
}
}
inline void decodebytesRGB5A3(u32 *dst, const u16 *src)
{
#if 0
for (int x = 0; x < 4; x++)
dst[x] = decode5A3(Common::swap16(src[x]));
#else
dst[0] = decode5A3(Common::swap16(src[0]));
dst[1] = decode5A3(Common::swap16(src[1]));
dst[2] = decode5A3(Common::swap16(src[2]));
dst[3] = decode5A3(Common::swap16(src[3]));
#endif
}
inline void decodebytesRGB5A3rgba(u32 *dst, const u16 *src)
{
#if 0
for (int x = 0; x < 4; x++)
dst[x] = decode5A3RGBA(Common::swap16(src[x]));
#else
dst[0] = decode5A3RGBA(Common::swap16(src[0]));
dst[1] = decode5A3RGBA(Common::swap16(src[1]));
dst[2] = decode5A3RGBA(Common::swap16(src[2]));
dst[3] = decode5A3RGBA(Common::swap16(src[3]));
#endif
}
// This one is used by many video formats. It'd therefore be good if it was fast.
// Needs more speed.
inline void decodebytesARGB8_4(u32 *dst, const u16 *src, const u16 *src2)
{
#if 0
for (int x = 0; x < 4; x++)
dst[x] = Common::swap32((src2[x] << 16) | src[x]);
#else
dst[0] = Common::swap32((src2[0] << 16) | src[0]);
dst[1] = Common::swap32((src2[1] << 16) | src[1]);
dst[2] = Common::swap32((src2[2] << 16) | src[2]);
dst[3] = Common::swap32((src2[3] << 16) | src[3]);
#endif
// This can probably be done in a few SSE pack/unpack instructions + pshufb
// some unpack instruction x2:
// ABABABABABABABAB 1212121212121212 ->
// AB12AB12AB12AB12 AB12AB12AB12AB12
// 2x pshufb->
// 21BA21BA21BA21BA 21BA21BA21BA21BA
// and we are done.
}
inline void decodebytesARGB8_4ToRgba(u32 *dst, const u16 *src, const u16 * src2)
{
#if 0
for (int x = 0; x < 4; x++) {
dst[x] = ((src[x] & 0xFF) << 24) | ((src[x] & 0xFF00)>>8) | (src2[x] << 8);
}
#else
dst[0] = ((src[0] & 0xFF) << 24) | ((src[0] & 0xFF00)>>8) | (src2[0] << 8);
dst[1] = ((src[1] & 0xFF) << 24) | ((src[1] & 0xFF00)>>8) | (src2[1] << 8);
dst[2] = ((src[2] & 0xFF) << 24) | ((src[2] & 0xFF00)>>8) | (src2[2] << 8);
dst[3] = ((src[3] & 0xFF) << 24) | ((src[3] & 0xFF00)>>8) | (src2[3] << 8);
#endif
}
inline u32 makecol(int r, int g, int b, int a)
{
return (a << 24)|(r << 16)|(g << 8)|b;
}
inline u32 makeRGBA(int r, int g, int b, int a)
{
return (a<<24)|(b<<16)|(g<<8)|r;
}
void decodeDXTBlock(u32 *dst, const DXTBlock *src, int pitch)
{
// S3TC Decoder (Note: GCN decodes differently from PC so we can't use native support)
// Needs more speed.
u16 c1 = Common::swap16(src->color1);
u16 c2 = Common::swap16(src->color2);
int blue1 = Convert5To8(c1 & 0x1F);
int blue2 = Convert5To8(c2 & 0x1F);
int green1 = Convert6To8((c1 >> 5) & 0x3F);
int green2 = Convert6To8((c2 >> 5) & 0x3F);
int red1 = Convert5To8((c1 >> 11) & 0x1F);
int red2 = Convert5To8((c2 >> 11) & 0x1F);
int colors[4];
colors[0] = makecol(red1, green1, blue1, 255);
colors[1] = makecol(red2, green2, blue2, 255);
if (c1 > c2)
{
int blue3 = ((blue2 - blue1) >> 1) - ((blue2 - blue1) >> 3);
int green3 = ((green2 - green1) >> 1) - ((green2 - green1) >> 3);
int red3 = ((red2 - red1) >> 1) - ((red2 - red1) >> 3);
colors[2] = makecol(red1 + red3, green1 + green3, blue1 + blue3, 255);
colors[3] = makecol(red2 - red3, green2 - green3, blue2 - blue3, 255);
}
else
{
colors[2] = makecol((red1 + red2 + 1) / 2, // Average
(green1 + green2 + 1) / 2,
(blue1 + blue2 + 1) / 2, 255);
colors[3] = makecol(red2, green2, blue2, 0); // Color2 but transparent
}
for (int y = 0; y < 4; y++)
{
int val = src->lines[y];
for (int x = 0; x < 4; x++)
{
dst[x] = colors[(val >> 6) & 3];
val <<= 2;
}
dst += pitch;
}
}
void decodeDXTBlockRGBA(u32 *dst, const DXTBlock *src, int pitch)
{
// S3TC Decoder (Note: GCN decodes differently from PC so we can't use native support)
// Needs more speed.
u16 c1 = Common::swap16(src->color1);
u16 c2 = Common::swap16(src->color2);
int blue1 = Convert5To8(c1 & 0x1F);
int blue2 = Convert5To8(c2 & 0x1F);
int green1 = Convert6To8((c1 >> 5) & 0x3F);
int green2 = Convert6To8((c2 >> 5) & 0x3F);
int red1 = Convert5To8((c1 >> 11) & 0x1F);
int red2 = Convert5To8((c2 >> 11) & 0x1F);
int colors[4];
colors[0] = makeRGBA(red1, green1, blue1, 255);
colors[1] = makeRGBA(red2, green2, blue2, 255);
if (c1 > c2)
{
int blue3 = ((blue2 - blue1) >> 1) - ((blue2 - blue1) >> 3);
int green3 = ((green2 - green1) >> 1) - ((green2 - green1) >> 3);
int red3 = ((red2 - red1) >> 1) - ((red2 - red1) >> 3);
colors[2] = makeRGBA(red1 + red3, green1 + green3, blue1 + blue3, 255);
colors[3] = makeRGBA(red2 - red3, green2 - green3, blue2 - blue3, 255);
}
else
{
colors[2] = makeRGBA((red1 + red2 + 1) / 2, // Average
(green1 + green2 + 1) / 2,
(blue1 + blue2 + 1) / 2, 255);
colors[3] = makeRGBA(red2, green2, blue2, 0); // Color2 but transparent
}
for (int y = 0; y < 4; y++)
{
int val = src->lines[y];
for (int x = 0; x < 4; x++)
{
dst[x] = colors[(val >> 6) & 3];
val <<= 2;
}
dst += pitch;
}
}
#if 0 // TODO - currently does not handle transparency correctly and causes problems when texture dimensions are not multiples of 8
static void copyDXTBlock(u8* dst, const u8* src)
{
((u16*)dst)[0] = Common::swap16(((u16*)src)[0]);
((u16*)dst)[1] = Common::swap16(((u16*)src)[1]);
u32 pixels = ((u32*)src)[1];
// A bit of trickiness here: the row are in the same order
// between the two formats, but the ordering within the rows
// is reversed.
pixels = ((pixels >> 4) & 0x0F0F0F0F) | ((pixels << 4) & 0xF0F0F0F0);
pixels = ((pixels >> 2) & 0x33333333) | ((pixels << 2) & 0xCCCCCCCC);
((u32*)dst)[1] = pixels;
}
#endif
static PC_TexFormat GetPCFormatFromTLUTFormat(int tlutfmt)
{
switch (tlutfmt)
{
case 0: return PC_TEX_FMT_IA8; // IA8
case 1: return PC_TEX_FMT_RGB565; // RGB565
case 2: return PC_TEX_FMT_BGRA32; // RGB5A3: This TLUT format requires
// extra work to decode.
}
return PC_TEX_FMT_NONE; // Error
}
PC_TexFormat GetPC_TexFormat(int texformat, int tlutfmt)
{
switch (texformat)
{
case GX_TF_C4:
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_I4:
return PC_TEX_FMT_IA8;
case GX_TF_I8: // speed critical
return PC_TEX_FMT_IA8;
case GX_TF_C8:
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_IA4:
return PC_TEX_FMT_IA4_AS_IA8;
case GX_TF_IA8:
return PC_TEX_FMT_IA8;
case GX_TF_C14X2:
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_RGB565:
return PC_TEX_FMT_RGB565;
case GX_TF_RGB5A3:
return PC_TEX_FMT_BGRA32;
case GX_TF_RGBA8: // speed critical
return PC_TEX_FMT_BGRA32;
case GX_TF_CMPR: // speed critical
// The metroid games use this format almost exclusively.
{
return PC_TEX_FMT_BGRA32;
}
}
// The "copy" texture formats, too?
return PC_TEX_FMT_NONE;
}
//switch endianness, unswizzle
//TODO: to save memory, don't blindly convert everything to argb8888
//also ARGB order needs to be swapped later, to accommodate modern hardware better
//need to add DXT support too
PC_TexFormat TexDecoder_Decode_real(u8 *dst, const u8 *src, int width, int height, int texformat, int tlutaddr, int tlutfmt)
{
const int Wsteps4 = (width + 3) / 4;
const int Wsteps8 = (width + 7) / 8;
switch (texformat)
{
case GX_TF_C4:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = yStep * 8; iy < 8; iy++, xStep++)
decodebytesC4_5A3_To_BGRA32((u32*)dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
}
else
{
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = yStep * 8; iy < 8; iy++, xStep++)
decodebytesC4_To_Raw16((u16*)dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
}
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_I4:
{
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = yStep * 8 ; iy < 8; iy++,xStep++)
for (int ix = 0; ix < 4; ix++)
{
int val = src[4 * xStep + ix];
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;
case GX_TF_I8: // speed critical
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
((u64*)(dst + (y + iy) * width + x))[0] = ((u64*)(src + 8 * xStep))[0];
}
return PC_TEX_FMT_I8;
case GX_TF_C8:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC8_5A3_To_BGRA32((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
}
else
{
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC8_To_Raw16((u16*)dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
}
}
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_IA4:
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesIA4((u16*)dst + (y + iy) * width + x, src + 8 * xStep);
}
return PC_TEX_FMT_IA4_AS_IA8;
case GX_TF_IA8:
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = yStep * 4; iy < 4; iy++, xStep++)
{
u16 *ptr = (u16 *)dst + (y + iy) * width + x;
u16 *s = (u16 *)(src + 8 * xStep);
for (int j = 0; j < 4; j++)
*ptr++ = Common::swap16(*s++);
}
}
return PC_TEX_FMT_IA8;
case GX_TF_C14X2:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC14X2_5A3_To_BGRA32((u32*)dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
}
else
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC14X2_To_Raw16((u16*)dst + (y + iy) * width + x,(u16*)(src + 8 * xStep), tlutaddr);
}
return GetPCFormatFromTLUTFormat(tlutfmt);
case GX_TF_RGB565:
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
{
u16 *ptr = (u16 *)dst + (y + iy) * width + x;
u16 *s = (u16 *)(src + 8 * xStep);
for (int j = 0; j < 4; j++)
*ptr++ = Common::swap16(*s++);
}
}
return PC_TEX_FMT_RGB565;
case GX_TF_RGB5A3:
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
//decodebytesRGB5A3((u32*)dst+(y+iy)*width+x, (u16*)src, 4);
decodebytesRGB5A3((u32*)dst+(y+iy)*width+x, (u16*)(src + 8 * xStep));
}
return PC_TEX_FMT_BGRA32;
case GX_TF_RGBA8: // speed critical
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
{
const u8* src2 = src + 64 * yStep;
for (int iy = 0; iy < 4; iy++)
decodebytesARGB8_4((u32*)dst + (y+iy)*width + x, (u16*)src2 + 4 * iy, (u16*)src2 + 4 * iy + 16);
}
}
}
return PC_TEX_FMT_BGRA32;
case GX_TF_CMPR: // speed critical
// The metroid games use this format almost exclusively.
{
#if 0 // TODO - currently does not handle transparency correctly and causes problems when texture dimensions are not multiples of 8
// 11111111 22222222 55555555 66666666
// 33333333 44444444 77777777 88888888
for (int y = 0; y < height; y += 8)
{
for (int x = 0; x < width; x += 8)
{
copyDXTBlock(dst+(y/2)*width+x*2, src);
src += 8;
copyDXTBlock(dst+(y/2)*width+x*2+8, src);
src += 8;
copyDXTBlock(dst+(y/2+2)*width+x*2, src);
src += 8;
copyDXTBlock(dst+(y/2+2)*width+x*2+8, src);
src += 8;
}
}
return PC_TEX_FMT_DXT1;
#else
for (int y = 0; y < height; y += 8)
{
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8, yStep++)
{
const u8* src2 = src + 4 * sizeof(DXTBlock) * yStep;
decodeDXTBlock((u32*)dst + y * width + x, (DXTBlock*)src2, width);
src2 += sizeof(DXTBlock);
decodeDXTBlock((u32*)dst + y * width + x + 4, (DXTBlock*)src2, width);
src2 += sizeof(DXTBlock);
decodeDXTBlock((u32*)dst + (y + 4) * width + x, (DXTBlock*)src2, width);
src2 += sizeof(DXTBlock);
decodeDXTBlock((u32*)dst + (y + 4) * width + x + 4, (DXTBlock*)src2, width);
}
}
#endif
return PC_TEX_FMT_BGRA32;
}
}
// The "copy" texture formats, too?
return PC_TEX_FMT_NONE;
}
// JSD 01/06/11:
// TODO: we really should ensure BOTH the source and destination addresses are aligned to 16-byte boundaries to
// squeeze out a little more performance. _mm_loadu_si128/_mm_storeu_si128 is slower than _mm_load_si128/_mm_store_si128
// because they work on unaligned addresses. The processor is free to make the assumption that addresses are multiples
// of 16 in the aligned case.
// TODO: complete SSE2 optimization of less often used texture formats.
// TODO: refactor algorithms using _mm_loadl_epi64 unaligned loads to prefer 128-bit aligned loads.
PC_TexFormat TexDecoder_Decode_RGBA(u32 * dst, const u8 * src, int width, int height, int texformat, int tlutaddr, int tlutfmt)
{
const int Wsteps4 = (width + 3) / 4;
const int Wsteps8 = (width + 7) / 8;
switch (texformat)
{
case GX_TF_C4:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
decodebytesC4_5A3_To_rgba32(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
}
else if (tlutfmt == 0)
{
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
decodebytesC4IA8_To_RGBA(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
}
else
{
for (int y = 0; y < height; y += 8)
for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
decodebytesC4RGB565_To_RGBA(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
}
break;
case GX_TF_I4:
{
// Reference C implementation:
for (int y = 0; y < height; y += 8)
for (int x = 0; x < width; x += 8)
for (int iy = 0; iy < 8; iy++, src += 4)
for (int ix = 0; ix < 4; ix++)
{
int val = src[ix];
u8 i1 = Convert4To8(val >> 4);
u8 i2 = Convert4To8(val & 0xF);
memset(dst+(y + iy) * width + x + ix * 2 , i1,4);
memset(dst+(y + iy) * width + x + ix * 2 + 1 , i2,4);
}
}
break;
case GX_TF_I8: // speed critical
{
// Reference C implementation
for (int y = 0; y < height; y += 4)
for (int x = 0; x < width; x += 8)
for (int iy = 0; iy < 4; ++iy, src += 8)
{
u32 * newdst = dst + (y + iy)*width+x;
const u8 * newsrc = src;
u8 srcval;
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
srcval = newsrc[0]; newdst[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
}
}
break;
case GX_TF_C8:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC8_5A3_To_RGBA32((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
}
else if (tlutfmt == 0)
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC8IA8_To_RGBA(dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
}
else
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC8RGB565_To_RGBA(dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
}
break;
case GX_TF_IA4:
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesIA4RGBA(dst + (y + iy) * width + x, src + 8 * xStep);
}
break;
case GX_TF_IA8:
{
// Reference C implementation:
for (int y = 0; y < height; y += 4)
for (int x = 0; x < width; x += 4)
for (int iy = 0; iy < 4; iy++, src += 8)
{
u32 *ptr = dst + (y + iy) * width + x;
u16 *s = (u16 *)src;
ptr[0] = decodeIA8Swapped(s[0]);
ptr[1] = decodeIA8Swapped(s[1]);
ptr[2] = decodeIA8Swapped(s[2]);
ptr[3] = decodeIA8Swapped(s[3]);
}
}
break;
case GX_TF_C14X2:
if (tlutfmt == 2)
{
// Special decoding is required for TLUT format 5A3
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC14X2_5A3_To_BGRA32(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
}
else if (tlutfmt == 0)
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC14X2IA8_To_RGBA(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
}
else
{
for (int y = 0; y < height; y += 4)
for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
decodebytesC14X2rgb565_To_RGBA(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
}
break;
case GX_TF_RGB565:
{
// Reference C implementation.
for (int y = 0; y < height; y += 4)
for (int x = 0; x < width; x += 4)
for (int iy = 0; iy < 4; iy++, src += 8)
{
u32 *ptr = dst + (y + iy) * width + x;
u16 *s = (u16 *)src;
for (int j = 0; j < 4; j++)
*ptr++ = decode565RGBA(Common::swap16(*s++));
}
}
break;
case GX_TF_RGB5A3:
{
// Reference C implementation:
for (int y = 0; y < height; y += 4)
for (int x = 0; x < width; x += 4)
for (int iy = 0; iy < 4; iy++, src += 8)
decodebytesRGB5A3rgba(dst+(y+iy)*width+x, (u16*)src);
}