mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2025-04-28 21:08:04 +03:00
a8e591dc73
The D3D / OGL backends only ever used RGBA textures, and the Software backend uses its own custom code for sampling. The ARGB path seems to just be dead code. Since ARGB and RGBA formats are similar, I don't think this will make the code more difficult to read or unable to be used as reference. Somebody who wants to use this code to output ARGB can simply modify the MakeRGBA function to put the shift at the other end.
450 lines
14 KiB
C++
450 lines
14 KiB
C++
// Copyright 2014 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <cmath>
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#include "Common/Common.h"
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#include "Common/CPUDetect.h"
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#include "VideoCommon/LookUpTables.h"
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#include "VideoCommon/TextureDecoder.h"
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//#include "VideoCommon/VideoCommon.h" // to get debug logs
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#include "VideoCommon/VideoConfig.h"
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// GameCube/Wii texture decoder
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// Decodes all known GameCube/Wii texture formats.
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// by ector
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static inline u32 decode5A3RGBA(u16 val)
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{
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int r,g,b,a;
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if ((val&0x8000))
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{
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r=Convert5To8((val>>10) & 0x1f);
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g=Convert5To8((val>>5 ) & 0x1f);
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b=Convert5To8((val ) & 0x1f);
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a=0xFF;
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}
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else
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{
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a=Convert3To8((val>>12) & 0x7);
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r=Convert4To8((val>>8 ) & 0xf);
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g=Convert4To8((val>>4 ) & 0xf);
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b=Convert4To8((val ) & 0xf);
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}
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return r | (g<<8) | (b << 16) | (a << 24);
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}
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static inline u32 decode565RGBA(u16 val)
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{
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int r,g,b,a;
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r=Convert5To8((val>>11) & 0x1f);
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g=Convert6To8((val>>5 ) & 0x3f);
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b=Convert5To8((val ) & 0x1f);
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a=0xFF;
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return r | (g<<8) | (b << 16) | (a << 24);
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}
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static inline u32 decodeIA8Swapped(u16 val)
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{
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int a = val & 0xFF;
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int i = val >> 8;
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return i | (i<<8) | (i<<16) | (a<<24);
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}
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struct DXTBlock
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{
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u16 color1;
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u16 color2;
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u8 lines[4];
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};
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inline void decodebytesC4_5A3_To_rgba32(u32 *dst, const u8 *src, int tlutaddr)
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{
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u16 *tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = decode5A3RGBA(Common::swap16(tlut[val >> 4]));
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*dst++ = decode5A3RGBA(Common::swap16(tlut[val & 0xF]));
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}
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}
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inline void decodebytesC4IA8_To_RGBA(u32* dst, const u8* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem+tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = decodeIA8Swapped(tlut[val >> 4]);
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*dst++ = decodeIA8Swapped(tlut[val & 0xF]);
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}
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}
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inline void decodebytesC4RGB565_To_RGBA(u32* dst, const u8* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem+tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u8 val = src[x];
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*dst++ = decode565RGBA(Common::swap16(tlut[val >> 4]));
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*dst++ = decode565RGBA(Common::swap16(tlut[val & 0xF]));
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}
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}
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inline void decodebytesC8_5A3_To_RGBA32(u32 *dst, const u8 *src, int tlutaddr)
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{
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u16 *tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 8; x++)
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{
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u8 val = src[x];
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*dst++ = decode5A3RGBA(Common::swap16(tlut[val]));
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}
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}
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inline void decodebytesC8IA8_To_RGBA(u32* dst, const u8* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 8; x++)
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{
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*dst++ = decodeIA8Swapped(tlut[src[x]]);
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}
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}
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inline void decodebytesC8RGB565_To_RGBA(u32* dst, const u8* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 8; x++)
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{
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*dst++ = decode565RGBA(Common::swap16(tlut[src[x]]));
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}
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}
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inline void decodebytesC14X2_5A3_To_RGBA(u32 *dst, const u16 *src, int tlutaddr)
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{
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u16 *tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = decode5A3RGBA(Common::swap16(tlut[(val & 0x3FFF)]));
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}
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}
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inline void decodebytesC14X2IA8_To_RGBA(u32* dst, const u16* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = decodeIA8Swapped(tlut[(val & 0x3FFF)]);
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}
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}
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inline void decodebytesC14X2rgb565_To_RGBA(u32* dst, const u16* src, int tlutaddr)
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{
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u16* tlut = (u16*)(texMem + tlutaddr);
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for (int x = 0; x < 4; x++)
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{
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u16 val = Common::swap16(src[x]);
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*dst++ = decode565RGBA(Common::swap16(tlut[(val & 0x3FFF)]));
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}
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}
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inline void decodebytesIA4RGBA(u32 *dst, const u8 *src)
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{
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for (int x = 0; x < 8; x++)
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{
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const u8 val = src[x];
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u8 a = Convert4To8(val >> 4);
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u8 l = Convert4To8(val & 0xF);
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dst[x] = (a << 24) | l << 16 | l << 8 | l;
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}
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}
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inline void decodebytesRGB5A3rgba(u32 *dst, const u16 *src)
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{
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#if 0
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for (int x = 0; x < 4; x++)
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dst[x] = decode5A3RGBA(Common::swap16(src[x]));
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#else
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dst[0] = decode5A3RGBA(Common::swap16(src[0]));
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dst[1] = decode5A3RGBA(Common::swap16(src[1]));
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dst[2] = decode5A3RGBA(Common::swap16(src[2]));
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dst[3] = decode5A3RGBA(Common::swap16(src[3]));
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#endif
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}
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inline void decodebytesARGB8_4ToRgba(u32 *dst, const u16 *src, const u16 * src2)
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{
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#if 0
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for (int x = 0; x < 4; x++)
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{
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dst[x] = ((src[x] & 0xFF) << 24) | ((src[x] & 0xFF00)>>8) | (src2[x] << 8);
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}
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#else
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dst[0] = ((src[0] & 0xFF) << 24) | ((src[0] & 0xFF00)>>8) | (src2[0] << 8);
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dst[1] = ((src[1] & 0xFF) << 24) | ((src[1] & 0xFF00)>>8) | (src2[1] << 8);
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dst[2] = ((src[2] & 0xFF) << 24) | ((src[2] & 0xFF00)>>8) | (src2[2] << 8);
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dst[3] = ((src[3] & 0xFF) << 24) | ((src[3] & 0xFF00)>>8) | (src2[3] << 8);
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#endif
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}
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inline u32 makeRGBA(int r, int g, int b, int a)
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{
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return (a<<24)|(b<<16)|(g<<8)|r;
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}
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void decodeDXTBlockRGBA(u32 *dst, const DXTBlock *src, int pitch)
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{
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// S3TC Decoder (Note: GCN decodes differently from PC so we can't use native support)
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// Needs more speed.
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u16 c1 = Common::swap16(src->color1);
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u16 c2 = Common::swap16(src->color2);
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int blue1 = Convert5To8(c1 & 0x1F);
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int blue2 = Convert5To8(c2 & 0x1F);
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int green1 = Convert6To8((c1 >> 5) & 0x3F);
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int green2 = Convert6To8((c2 >> 5) & 0x3F);
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int red1 = Convert5To8((c1 >> 11) & 0x1F);
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int red2 = Convert5To8((c2 >> 11) & 0x1F);
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int colors[4];
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colors[0] = makeRGBA(red1, green1, blue1, 255);
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colors[1] = makeRGBA(red2, green2, blue2, 255);
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if (c1 > c2)
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{
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int blue3 = ((blue2 - blue1) >> 1) - ((blue2 - blue1) >> 3);
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int green3 = ((green2 - green1) >> 1) - ((green2 - green1) >> 3);
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int red3 = ((red2 - red1) >> 1) - ((red2 - red1) >> 3);
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colors[2] = makeRGBA(red1 + red3, green1 + green3, blue1 + blue3, 255);
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colors[3] = makeRGBA(red2 - red3, green2 - green3, blue2 - blue3, 255);
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}
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else
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{
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colors[2] = makeRGBA((red1 + red2 + 1) / 2, // Average
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(green1 + green2 + 1) / 2,
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(blue1 + blue2 + 1) / 2, 255);
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colors[3] = makeRGBA(red2, green2, blue2, 0); // Color2 but transparent
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}
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for (int y = 0; y < 4; y++)
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{
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int val = src->lines[y];
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for (int x = 0; x < 4; x++)
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{
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dst[x] = colors[(val >> 6) & 3];
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val <<= 2;
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}
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dst += pitch;
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}
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}
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// JSD 01/06/11:
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// TODO: we really should ensure BOTH the source and destination addresses are aligned to 16-byte boundaries to
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// squeeze out a little more performance. _mm_loadu_si128/_mm_storeu_si128 is slower than _mm_load_si128/_mm_store_si128
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// because they work on unaligned addresses. The processor is free to make the assumption that addresses are multiples
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// of 16 in the aligned case.
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// TODO: complete SSE2 optimization of less often used texture formats.
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// TODO: refactor algorithms using _mm_loadl_epi64 unaligned loads to prefer 128-bit aligned loads.
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PC_TexFormat _TexDecoder_DecodeImpl(u32 * dst, const u8 * src, int width, int height, int texformat, int tlutaddr, int tlutfmt)
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{
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const int Wsteps4 = (width + 3) / 4;
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const int Wsteps8 = (width + 7) / 8;
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switch (texformat)
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{
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case GX_TF_C4:
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if (tlutfmt == 2)
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{
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// Special decoding is required for TLUT format 5A3
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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decodebytesC4_5A3_To_rgba32(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
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}
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else if (tlutfmt == 0)
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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decodebytesC4IA8_To_RGBA(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
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}
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else
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{
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for (int y = 0; y < height; y += 8)
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for (int x = 0, yStep = (y / 8) * Wsteps8; x < width; x += 8,yStep++)
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for (int iy = 0, xStep = 8 * yStep; iy < 8; iy++,xStep++)
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decodebytesC4RGB565_To_RGBA(dst + (y + iy) * width + x, src + 4 * xStep, tlutaddr);
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}
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break;
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case GX_TF_I4:
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{
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// Reference C implementation:
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for (int y = 0; y < height; y += 8)
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for (int x = 0; x < width; x += 8)
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for (int iy = 0; iy < 8; iy++, src += 4)
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for (int ix = 0; ix < 4; ix++)
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{
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int val = src[ix];
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u8 i1 = Convert4To8(val >> 4);
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u8 i2 = Convert4To8(val & 0xF);
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memset(dst+(y + iy) * width + x + ix * 2 , i1,4);
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memset(dst+(y + iy) * width + x + ix * 2 + 1 , i2,4);
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}
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}
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break;
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case GX_TF_I8: // speed critical
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{
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// Reference C implementation
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for (int y = 0; y < height; y += 4)
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for (int x = 0; x < width; x += 8)
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for (int iy = 0; iy < 4; ++iy, src += 8)
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{
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u32 * newdst = dst + (y + iy)*width+x;
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const u8 * newsrc = src;
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u8 srcval;
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0]; (newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = newsrc[0]; newdst[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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}
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}
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break;
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case GX_TF_C8:
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if (tlutfmt == 2)
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{
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// Special decoding is required for TLUT format 5A3
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC8_5A3_To_RGBA32((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
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}
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else if (tlutfmt == 0)
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{
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC8IA8_To_RGBA(dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
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}
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else
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{
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC8RGB565_To_RGBA(dst + (y + iy) * width + x, src + 8 * xStep, tlutaddr);
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}
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break;
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case GX_TF_IA4:
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{
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps8; x < width; x += 8, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesIA4RGBA(dst + (y + iy) * width + x, src + 8 * xStep);
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}
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break;
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case GX_TF_IA8:
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{
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// Reference C implementation:
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for (int y = 0; y < height; y += 4)
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for (int x = 0; x < width; x += 4)
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for (int iy = 0; iy < 4; iy++, src += 8)
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{
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u32 *ptr = dst + (y + iy) * width + x;
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u16 *s = (u16 *)src;
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ptr[0] = decodeIA8Swapped(s[0]);
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ptr[1] = decodeIA8Swapped(s[1]);
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ptr[2] = decodeIA8Swapped(s[2]);
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ptr[3] = decodeIA8Swapped(s[3]);
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}
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}
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break;
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case GX_TF_C14X2:
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if (tlutfmt == 2)
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{
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// Special decoding is required for TLUT format 5A3
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC14X2_5A3_To_RGBA(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
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}
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else if (tlutfmt == 0)
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{
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC14X2IA8_To_RGBA(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
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}
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else
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{
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for (int y = 0; y < height; y += 4)
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for (int x = 0, yStep = (y / 4) * Wsteps4; x < width; x += 4, yStep++)
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for (int iy = 0, xStep = 4 * yStep; iy < 4; iy++, xStep++)
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decodebytesC14X2rgb565_To_RGBA(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlutaddr);
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}
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break;
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case GX_TF_RGB565:
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{
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// Reference C implementation.
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for (int y = 0; y < height; y += 4)
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for (int x = 0; x < width; x += 4)
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for (int iy = 0; iy < 4; iy++, src += 8)
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{
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u32 *ptr = dst + (y + iy) * width + x;
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u16 *s = (u16 *)src;
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for (int j = 0; j < 4; j++)
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*ptr++ = decode565RGBA(Common::swap16(*s++));
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}
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}
|
|
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);
|
|
}
|
|
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++)
|
|
decodebytesARGB8_4ToRgba(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)
|
|
{
|
|
decodeDXTBlockRGBA((u32*)dst + y * width + x, (DXTBlock*)src, width);
|
|
src += sizeof(DXTBlock);
|
|
decodeDXTBlockRGBA((u32*)dst + y * width + x + 4, (DXTBlock*)src, width);
|
|
src += sizeof(DXTBlock);
|
|
decodeDXTBlockRGBA((u32*)dst + (y + 4) * width + x, (DXTBlock*)src, width);
|
|
src += sizeof(DXTBlock);
|
|
decodeDXTBlockRGBA((u32*)dst + (y + 4) * width + x + 4, (DXTBlock*)src, width);
|
|
src += sizeof(DXTBlock);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// The "copy" texture formats, too?
|
|
return PC_TEX_FMT_RGBA32;
|
|
}
|