443 lines
13 KiB
C++
443 lines
13 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Globals.h"
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#include "Common.h"
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#include "TextureDecoder.h"
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// TRAM
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u8 texMem[TMEM_SIZE];
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//////////////////////////////////////////////////////////////////////////
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// Gamecube texture decoder
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//////////////////////////////////////////////////////////////////////////
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// Decodes all known Gamecube texture formats.
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// by ector
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//////////////////////////////////////////////////////////////////////////
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int TexDecoder_GetTexelSizeInNibbles(int format)
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{
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switch(format&0x3f) {
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case GX_TF_I4: return 1;
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case GX_TF_I8: return 2;
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case GX_TF_IA4: return 2;
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case GX_TF_IA8: return 4;
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case GX_TF_RGB565: return 4;
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case GX_TF_RGB5A3: return 4;
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case GX_TF_RGBA8: return 8;
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case GX_TF_C4: return 1;
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case GX_TF_C8: return 2;
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case GX_TF_C14X2: return 4;
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case GX_TF_CMPR: return 1;
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default: return 1;
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}
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}
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int TexDecoder_GetBlockWidthInTexels(int format)
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{
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switch(format) {
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case GX_TF_I4: return 8;
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case GX_TF_I8: return 8;
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case GX_TF_IA4: return 8;
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case GX_TF_IA8: return 4;
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case GX_TF_RGB565: return 4;
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case GX_TF_RGB5A3: return 4;
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case GX_TF_RGBA8: return 4;
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case GX_TF_C4: return 8;
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case GX_TF_C8: return 8;
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case GX_TF_C14X2: return 4;
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case GX_TF_CMPR: return 8;
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default: return 8;
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}
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}
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//returns bytes
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int TexDecoder_GetPaletteSize(int format)
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{
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switch (format) {
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case GX_TF_C4: return 16*2;
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case GX_TF_C8: return 256*2;
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case GX_TF_C14X2: return 16384*2;
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default:
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return 0;
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}
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}
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inline u32 decode565(u16 val)
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{
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int r,g,b,a;
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r=lut5to8[(val>>11)&0x1f];
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g=lut6to8[(val>>5 )&0x3f];
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b=lut5to8[(val )&0x1f];
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a=0xFF;
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return (a<<24) | (r<<16) | (g<<8) | b;
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}
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inline u32 decodeIA8(u16 val)
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{
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int a=val>>8;
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int r,g,b;
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r=g=b=val&0xFF;
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return (a<<24) | (r<<16) | (g<<8) | b;
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}
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inline u32 decode5A3(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=lut5to8[(val>>10)&0x1f];
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g=lut5to8[(val>>5 )&0x1f];
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b=lut5to8[(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=lut3to8[(val>>12)&0x7];
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r=lut4to8[(val>>8 )&0xf];
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g=lut4to8[(val>>4 )&0xf];
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b=lut4to8[(val )&0xf];
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}
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return (a<<24) | (r<<16) | (g<<8) | b;
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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 int expand8888(const int j)
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{
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int i = j | (j<<8);
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return i|(i<<16);
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}
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inline void decodebytesI4(u32 *dst, u8 *src, int numbytes)
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{
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for (int x=0; x<numbytes; x++)
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{
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int val = src[x];
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*dst++ = expand8888(lut4to8[val>>4]);
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*dst++ = expand8888(lut4to8[val&15]);
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}
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}
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inline void decodebytesI8(u32 *dst, u8 *src, int numbytes)
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{
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for (int x=0; x<numbytes; x++)
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*dst++ = expand8888(src[x]); //asm bswap loop?
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}
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inline void decodebytesC4(u32 *dst, u8 *src, int numbytes, int tlutaddr, int tlutfmt)
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{
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u16 *tlut = (u16*)(texMem+tlutaddr);
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for (int x=0; x<numbytes; x++)
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{
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int val = src[x];
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switch(tlutfmt) {
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case 0:
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*dst++ = decodeIA8(Common::swap16(tlut[(val>>4)]));
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*dst++ = decodeIA8(Common::swap16(tlut[(val&15)]));
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break;
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case 1:
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*dst++ = decode565(Common::swap16(tlut[(val>>4)]));
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*dst++ = decode565(Common::swap16(tlut[(val&15)]));
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break;
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case 2:
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*dst++ = decode5A3(Common::swap16(tlut[(val>>4)]));
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*dst++ = decode5A3(Common::swap16(tlut[(val&15)]));
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break;
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case 3: //ERROR
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*dst++ = 0xFFFF00FF;
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*dst++ = 0xFFFF00FF;
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break;
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}
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}
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}
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inline void decodebytesC8(u32 *dst, u8 *src, int numbytes, int tlutaddr, int tlutfmt)
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{
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u16 *tlut = (u16*)(texMem+tlutaddr);
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for (int x=0; x<numbytes; x++)
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{
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int val = src[x];
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switch(tlutfmt) {
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case 0:
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*dst++ = decodeIA8(Common::swap16(tlut[val]));
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break;
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case 1:
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*dst++ = decode565(Common::swap16(tlut[val]));
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break;
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case 2:
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*dst++ = decode5A3(Common::swap16(tlut[val]));
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break;
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case 3: //ERROR
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*dst++ = 0xFFFF00FF;
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break;
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}
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}
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}
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inline void decodebytesC14X2(u32 *dst, u16 *src, int numpixels, int tlutaddr, int tlutfmt)
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{
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u16 *tlut = (u16*)(texMem+tlutaddr);
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for (int x=0; x<numpixels; x++)
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{
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int val = Common::swap16(src[x]);
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switch(tlutfmt) {
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case 0:
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*dst++ = decodeIA8(Common::swap16(tlut[(val&0x3FFF)]));
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break;
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case 1:
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*dst++ = decode565(Common::swap16(tlut[(val&0x3FFF)]));
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break;
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case 2:
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*dst++ = decode5A3(Common::swap16(tlut[(val&0x3FFF)]));
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break;
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case 3: //ERROR
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*dst++ = 0xFFFF00FF;
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break;
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}
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}
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}
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inline void decodebytesRGB565(u32 *dst, u16 *src, int numpixels)
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{
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for (int x=0; x<numpixels; x++)
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*dst++ = decode565(Common::swap16(src[x]));
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}
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inline void decodebytesIA4(u32 *dst, u8 *src, int numbytes)
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{
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for (int x=0; x<numbytes; x++)
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{
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int val = src[x];
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int a = lut4to8[val>>4];
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int r = lut4to8[val&15];
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*dst++ = (a<<24) | (r<<16) | (r<<8) | r;
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}
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}
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inline void decodebytesIA8(u32 *dst, u16 *src, int numpixels)
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{
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for (int x=0; x<numpixels; x++)
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*dst++ = decodeIA8(Common::swap16(src[x]));
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}
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inline void decodebytesRGB5A3(u32 *dst, u16 *src, int numpixels)
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{
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for (int x=0; x<numpixels; x++)
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*dst++ = decode5A3(Common::swap16(src[x]));
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}
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inline void decodebytesARGB8pass1(u32 *dst, u16 *src, int numpixels)
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{
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for (int x=0; x<numpixels; x++)
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{
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int val = Common::swap16(src[x]);
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int a=val&0xFF;
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val>>=8;
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*dst++ = (a<<16) | (val<<24);
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}
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}
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inline void decodebytesARGB8pass2(u32 *dst, u16 *src, int numpixels)
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{
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for (int x=0; x<numpixels; x++)
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{
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int val = Common::swap16(src[x]);
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int a=val&0xFF;
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val>>=8;
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*dst++ |= (val<<8) | (a<<0);
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}
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}
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inline u32 makecol(int r,int g,int b,int a)
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{
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return ((a&255)<<24)|((r&255)<<16)|((g&255)<<8)|((b&255));
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}
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//this needs to be FAST, used by some games realtime video
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//TODO: port to ASM or intrinsics
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void decodeDXTBlock(u32 *dst, DXTBlock *src, int pitch)
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{
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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 = lut5to8[c1&0x1F];
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int blue2 = lut5to8[c2&0x1F];
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int green1 = lut6to8[(c1>>5)&0x3F];
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int green2 = lut6to8[(c2>>5)&0x3F];
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int red1 = lut5to8[(c1>>11)&0x1F];
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int red2 = lut5to8[(c2>>11)&0x1F];
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int colors[4];
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if (c1>c2)
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{
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colors[0]=makecol(red1,green1,blue1,255);
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colors[1]=makecol(red2,green2,blue2,255);
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colors[2]=makecol(red1+(red2-red1)/3,green1+(green2-green1)/3,blue1+(blue2-blue1)/3,255);
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colors[3]=makecol(red2+(red1-red2)/3,green2+(green1-green2)/3,blue2+(blue1-blue2)/3,255);
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}
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else
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{
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colors[0]=makecol(red1,green1,blue1,255);
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colors[1]=makecol(red2,green2,blue2,255);
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colors[2]=makecol((red1+red2)/2,(green1+green2)/2,(blue1+blue2)/2,255);
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colors[3]=makecol(0,0,0,0); //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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//switch endianness, unswizzle
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//TODO: to save memory, don't blindly convert everything to argb8888
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//also ARGB order needs to be swapped later, to accommodate modern hardware better
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//need to add DXT support too
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TEXTUREFMT TexDecoder_Decode(u8 *dst, u8 *src, int width, int height, int texformat, int tlutaddr, int tlutfmt)
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{
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DVSTARTPROFILE();
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switch (texformat)
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{
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case GX_TF_C4:
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{
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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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decodebytesC4((u32*)dst+(y+iy)*width+x,src,4,tlutaddr,tlutfmt);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_I4:
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{
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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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decodebytesI4((u32*)dst+(y+iy)*width+x,src,4);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_C8:
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{
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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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decodebytesC8((u32*)dst+(y+iy)*width+x,src,8,tlutaddr,tlutfmt);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_I8:
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{
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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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decodebytesI8((u32*)dst+(y+iy)*width+x,src,8);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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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; x<width; x+=8)
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for (int iy=0; iy<4; iy++, src+=8)
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decodebytesIA4((u32*)dst+(y+iy)*width+x,src,8);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_IA8:
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{
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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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decodebytesIA8((u32*)dst+(y+iy)*width+x,(u16*)src,4);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_C14X2:
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{
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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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decodebytesC14X2((u32*)dst+(y+iy)*width+x,(u16*)src,4,tlutaddr,tlutfmt);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_RGB565:
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{
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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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decodebytesRGB565((u32*)dst+(y+iy)*width+x,(u16*)src,4);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_RGB5A3:
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{
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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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decodebytesRGB5A3((u32*)dst+(y+iy)*width+x,(u16*)src,4);
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_RGBA8:
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{
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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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{
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for (int iy=0; iy<4; iy++,src+=8)
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decodebytesARGB8pass1((u32*)dst+(y+iy)*width+x,(u16*)src,4);
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for (int iy=0; iy<4; iy++,src+=8)
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decodebytesARGB8pass2((u32*)dst+(y+iy)*width+x,(u16*)src,4);
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}
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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case GX_TF_CMPR:
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{
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// 11111111 22222222 55555555 66666666
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// 33333333 44444444 77777777 88888888
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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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{
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decodeDXTBlock((u32*)dst+y*width+x,(DXTBlock*)src,width);src+=sizeof(DXTBlock);
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decodeDXTBlock((u32*)dst+y*width+x+4,(DXTBlock*)src,width);src+=sizeof(DXTBlock);
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decodeDXTBlock((u32*)dst+(y+4)*width+x,(DXTBlock*)src,width);src+=sizeof(DXTBlock);
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decodeDXTBlock((u32*)dst+(y+4)*width+x+4,(DXTBlock*)src,width);src+=sizeof(DXTBlock);
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}
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}
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return TEXTUREFMT(GL_BGRA, GL_UNSIGNED_BYTE);
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}
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// The "copy" texture formats, too?
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return TEXTUREFMT(0, 0);
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}
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