dolphin/Source/Core/VideoCommon/TextureDecoder_Generic.cpp
degasus 615ae9f106 TexCache: remove PC_TexFormat
We only support rgba32 for a while now, so there is no need to have everything in common configureable.
2015-01-18 19:47:48 +01:00

348 lines
10 KiB
C++

// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <algorithm>
#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"
// GameCube/Wii texture decoder
// Decodes all known GameCube/Wii texture formats.
// by ector
static inline u32 DecodePixel_IA8(u16 val)
{
int a = val & 0xFF;
int i = val >> 8;
return i | (i<<8) | (i<<16) | (a<<24);
}
static inline u32 DecodePixel_RGB565(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 DecodePixel_RGB5A3(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 DecodePixel_Paletted(u16 pixel, TlutFormat tlutfmt)
{
switch (tlutfmt)
{
case GX_TL_IA8:
return DecodePixel_IA8(pixel);
case GX_TL_RGB565:
return DecodePixel_RGB565(Common::swap16(pixel));
case GX_TL_RGB5A3:
return DecodePixel_RGB5A3(Common::swap16(pixel));
default:
return 0;
}
}
static inline void DecodeBytes_C4(u32 *dst, const u8 *src, const u8* tlut_, TlutFormat tlutfmt)
{
const u16* tlut = (u16*) tlut_;
for (int x = 0; x < 4; x++)
{
u8 val = src[x];
*dst++ = DecodePixel_Paletted(tlut[val >> 4], tlutfmt);
*dst++ = DecodePixel_Paletted(tlut[val & 0xF], tlutfmt);
}
}
static inline void DecodeBytes_C8(u32 *dst, const u8 *src, const u8* tlut_, TlutFormat tlutfmt)
{
const u16* tlut = (u16*) tlut_;
for (int x = 0; x < 8; x++)
{
u8 val = src[x];
*dst++ = DecodePixel_Paletted(tlut[val], tlutfmt);
}
}
static inline void DecodeBytes_C14X2(u32 *dst, const u16 *src, const u8* tlut_, TlutFormat tlutfmt)
{
const u16* tlut = (u16*) tlut_;
for (int x = 0; x < 4; x++)
{
u16 val = Common::swap16(src[x]);
*dst++ = DecodePixel_Paletted(tlut[(val & 0x3FFF)], tlutfmt);
}
}
static inline void DecodeBytes_IA4(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;
}
}
static inline void DecodeBytes_RGB5A3(u32 *dst, const u16 *src)
{
#if 0
for (int x = 0; x < 4; x++)
dst[x] = DecodePixel_RGB5A3(Common::swap16(src[x]));
#else
dst[0] = DecodePixel_RGB5A3(Common::swap16(src[0]));
dst[1] = DecodePixel_RGB5A3(Common::swap16(src[1]));
dst[2] = DecodePixel_RGB5A3(Common::swap16(src[2]));
dst[3] = DecodePixel_RGB5A3(Common::swap16(src[3]));
#endif
}
static inline void DecodeBytes_RGBA8(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
}
struct DXTBlock
{
u16 color1;
u16 color2;
u8 lines[4];
};
static inline u32 MakeRGBA(int r, int g, int b, int a)
{
return (a<<24)|(b<<16)|(g<<8)|r;
}
static 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] = 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;
}
}
// 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.
void _TexDecoder_DecodeImpl(u32 * dst, const u8 * src, int width, int height, int texformat, const u8* tlut, TlutFormat tlutfmt)
{
const int Wsteps4 = (width + 3) / 4;
const int Wsteps8 = (width + 7) / 8;
switch (texformat)
{
case GX_TF_C4:
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++)
DecodeBytes_C4(dst + (y + iy) * width + x, src + 4 * xStep, tlut, tlutfmt);
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:
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++)
DecodeBytes_C8((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlut, tlutfmt);
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++)
DecodeBytes_IA4(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] = DecodePixel_IA8(s[0]);
ptr[1] = DecodePixel_IA8(s[1]);
ptr[2] = DecodePixel_IA8(s[2]);
ptr[3] = DecodePixel_IA8(s[3]);
}
}
break;
case GX_TF_C14X2:
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++)
DecodeBytes_C14X2(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlut, tlutfmt);
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++ = DecodePixel_RGB565(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)
DecodeBytes_RGB5A3(dst+(y+iy)*width+x, (u16*)src);
}
break;
case GX_TF_RGBA8: // speed critical
{
// 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++)
DecodeBytes_RGBA8(dst + (y+iy)*width + x, (u16*)src + 4 * iy, (u16*)src + 4 * iy + 16);
src += 64;
}
}
break;
case GX_TF_CMPR: // speed critical
// The metroid games use this format almost exclusively.
{
for (int y = 0; y < height; y += 8)
{
for (int x = 0; x < width; x += 8)
{
DecodeDXTBlock((u32*)dst + y * width + x, (DXTBlock*)src, width);
src += sizeof(DXTBlock);
DecodeDXTBlock((u32*)dst + y * width + x + 4, (DXTBlock*)src, width);
src += sizeof(DXTBlock);
DecodeDXTBlock((u32*)dst + (y + 4) * width + x, (DXTBlock*)src, width);
src += sizeof(DXTBlock);
DecodeDXTBlock((u32*)dst + (y + 4) * width + x + 4, (DXTBlock*)src, width);
src += sizeof(DXTBlock);
}
}
break;
}
}
}