forked from dolphin-emu/dolphin
365 lines
11 KiB
C++
365 lines
11 KiB
C++
// Copyright 2008 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/CPUDetect.h"
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#include "Common/CommonFuncs.h"
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#include "Common/CommonTypes.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 DecodePixel_IA8(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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static inline u32 DecodePixel_RGB565(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 DecodePixel_RGB5A3(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 DecodePixel_Paletted(u16 pixel, TlutFormat tlutfmt)
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{
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switch (tlutfmt)
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{
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case GX_TL_IA8:
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return DecodePixel_IA8(pixel);
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case GX_TL_RGB565:
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return DecodePixel_RGB565(Common::swap16(pixel));
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case GX_TL_RGB5A3:
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return DecodePixel_RGB5A3(Common::swap16(pixel));
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default:
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return 0;
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}
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}
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static inline void DecodeBytes_C4(u32* dst, const u8* src, const u8* tlut_, TlutFormat tlutfmt)
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{
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const u16* tlut = (u16*)tlut_;
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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++ = DecodePixel_Paletted(tlut[val >> 4], tlutfmt);
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*dst++ = DecodePixel_Paletted(tlut[val & 0xF], tlutfmt);
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}
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}
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static inline void DecodeBytes_C8(u32* dst, const u8* src, const u8* tlut_, TlutFormat tlutfmt)
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{
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const u16* tlut = (u16*)tlut_;
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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++ = DecodePixel_Paletted(tlut[val], tlutfmt);
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}
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}
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static inline void DecodeBytes_C14X2(u32* dst, const u16* src, const u8* tlut_, TlutFormat tlutfmt)
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{
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const u16* tlut = (u16*)tlut_;
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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++ = DecodePixel_Paletted(tlut[(val & 0x3FFF)], tlutfmt);
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}
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}
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static inline void DecodeBytes_IA4(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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static inline void DecodeBytes_RGB5A3(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] = DecodePixel_RGB5A3(Common::swap16(src[x]));
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#else
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dst[0] = DecodePixel_RGB5A3(Common::swap16(src[0]));
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dst[1] = DecodePixel_RGB5A3(Common::swap16(src[1]));
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dst[2] = DecodePixel_RGB5A3(Common::swap16(src[2]));
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dst[3] = DecodePixel_RGB5A3(Common::swap16(src[3]));
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#endif
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}
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static inline void DecodeBytes_RGBA8(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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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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static 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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static void DecodeDXTBlock(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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// Approximation of x/3: 3/8 (1/2 - 1/8)
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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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// color[3] is the same as color[2] (average of both colors), but transparent.
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// This differs from DXT1 where color[3] is transparent black.
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colors[2] =
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MakeRGBA((red1 + red2 + 1) / 2, (green1 + green2 + 1) / 2, (blue1 + blue2 + 1) / 2, 255);
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colors[3] =
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MakeRGBA((red1 + red2 + 1) / 2, (green1 + green2 + 1) / 2, (blue1 + blue2 + 1) / 2, 0);
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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
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// boundaries to
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// squeeze out a little more performance. _mm_loadu_si128/_mm_storeu_si128 is slower than
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// _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
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// 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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void _TexDecoder_DecodeImpl(u32* dst, const u8* src, int width, int height, int texformat,
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const u8* tlut, TlutFormat 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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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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DecodeBytes_C4(dst + (y + iy) * width + x, src + 4 * xStep, tlut, tlutfmt);
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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];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = (newsrc++)[0];
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(newdst++)[0] = srcval | (srcval << 8) | (srcval << 16) | (srcval << 24);
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srcval = newsrc[0];
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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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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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DecodeBytes_C8((u32*)dst + (y + iy) * width + x, src + 8 * xStep, tlut, tlutfmt);
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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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DecodeBytes_IA4(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] = DecodePixel_IA8(s[0]);
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ptr[1] = DecodePixel_IA8(s[1]);
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ptr[2] = DecodePixel_IA8(s[2]);
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ptr[3] = DecodePixel_IA8(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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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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DecodeBytes_C14X2(dst + (y + iy) * width + x, (u16*)(src + 8 * xStep), tlut, tlutfmt);
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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++ = DecodePixel_RGB565(Common::swap16(*s++));
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}
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}
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break;
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case GX_TF_RGB5A3:
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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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DecodeBytes_RGB5A3(dst + (y + iy) * width + x, (u16*)src);
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}
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break;
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case GX_TF_RGBA8: // 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 += 4)
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{
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for (int iy = 0; iy < 4; iy++)
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DecodeBytes_RGBA8(dst + (y + iy) * width + x, (u16*)src + 4 * iy,
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(u16*)src + 4 * iy + 16);
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src += 64;
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}
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}
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break;
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case GX_TF_CMPR: // speed critical
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// The metroid games use this format almost exclusively.
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{
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for (int y = 0; y < height; y += 8)
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{
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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);
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src += sizeof(DXTBlock);
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DecodeDXTBlock((u32*)dst + y * width + x + 4, (DXTBlock*)src, width);
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src += sizeof(DXTBlock);
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DecodeDXTBlock((u32*)dst + (y + 4) * width + x, (DXTBlock*)src, width);
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src += sizeof(DXTBlock);
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DecodeDXTBlock((u32*)dst + (y + 4) * width + x + 4, (DXTBlock*)src, width);
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src += sizeof(DXTBlock);
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}
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}
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break;
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}
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}
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}
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