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dolphin/Source/Core/VideoCommon/TextureDecoder_Common.cpp

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// Copyright 2014 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <cmath>
#include <cstddef>
#include "Common/CommonTypes.h"
#include "Common/MsgHandler.h"
#include "Common/Swap.h"
#include "VideoCommon/LookUpTables.h"
#include "VideoCommon/TextureDecoder.h"
#include "VideoCommon/TextureDecoder_Util.h"
#include "VideoCommon/sfont.inc"
static bool TexFmt_Overlay_Enable = false;
static bool TexFmt_Overlay_Center = false;
// TRAM
// STATE_TO_SAVE
alignas(16) u8 texMem[TMEM_SIZE];
int TexDecoder_GetTexelSizeInNibbles(TextureFormat format)
{
switch (format)
{
// 4-bit formats
case TextureFormat::I4:
case TextureFormat::C4:
return 1;
// 8-bit formats
case TextureFormat::I8:
case TextureFormat::IA4:
case TextureFormat::C8:
return 2;
// 16-bit formats
case TextureFormat::IA8:
case TextureFormat::RGB565:
case TextureFormat::RGB5A3:
case TextureFormat::C14X2:
return 4;
// 32-bit formats
case TextureFormat::RGBA8:
return 8;
// Compressed format
case TextureFormat::CMPR:
return 1;
// Special formats
case TextureFormat::XFB:
return 4;
default:
PanicAlertFmt("Invalid Texture Format {}! (GetTexelSizeInNibbles)", format);
return 1;
}
}
int TexDecoder_GetTextureSizeInBytes(int width, int height, TextureFormat format)
{
return (width * height * TexDecoder_GetTexelSizeInNibbles(format)) / 2;
}
int TexDecoder_GetBlockWidthInTexels(TextureFormat format)
{
switch (format)
{
// 4-bit formats
case TextureFormat::I4:
case TextureFormat::C4:
return 8;
// 8-bit formats
case TextureFormat::I8:
case TextureFormat::IA4:
case TextureFormat::C8:
return 8;
// 16-bit formats
case TextureFormat::IA8:
case TextureFormat::RGB565:
case TextureFormat::RGB5A3:
case TextureFormat::C14X2:
return 4;
// 32-bit formats
case TextureFormat::RGBA8:
return 4;
// Compressed format
case TextureFormat::CMPR:
return 8;
// Special formats
case TextureFormat::XFB:
return 16;
default:
PanicAlertFmt("Invalid Texture Format {}! (GetBlockWidthInTexels)", format);
return 8;
}
}
int TexDecoder_GetBlockHeightInTexels(TextureFormat format)
{
switch (format)
{
// 4-bit formats
case TextureFormat::I4:
case TextureFormat::C4:
return 8;
// 8-bit formats
case TextureFormat::I8:
case TextureFormat::IA4:
case TextureFormat::C8:
return 4;
// 16-bit formats
case TextureFormat::IA8:
case TextureFormat::RGB565:
case TextureFormat::RGB5A3:
case TextureFormat::C14X2:
return 4;
// 32-bit formats
case TextureFormat::RGBA8:
return 4;
// Compressed format
case TextureFormat::CMPR:
return 8;
// Special formats
case TextureFormat::XFB:
return 1;
default:
PanicAlertFmt("Invalid Texture Format {}! (GetBlockHeightInTexels)", format);
return 4;
}
}
int TexDecoder_GetEFBCopyBlockWidthInTexels(EFBCopyFormat format)
{
switch (format)
{
// 4-bit formats
case EFBCopyFormat::R4:
return 8;
// 8-bit formats
case EFBCopyFormat::RA4:
case EFBCopyFormat::A8:
case EFBCopyFormat::R8_0x1:
case EFBCopyFormat::R8:
case EFBCopyFormat::G8:
case EFBCopyFormat::B8:
return 8;
// 16-bit formats
case EFBCopyFormat::RA8:
case EFBCopyFormat::RGB565:
case EFBCopyFormat::RGB5A3:
case EFBCopyFormat::RG8:
case EFBCopyFormat::GB8:
return 4;
// 32-bit formats
case EFBCopyFormat::RGBA8:
return 4;
// Special formats
case EFBCopyFormat::XFB:
return 16;
default:
PanicAlertFmt("Invalid EFB Copy Format {}! (GetEFBCopyBlockWidthInTexels)", format);
return 8;
}
}
int TexDecoder_GetEFBCopyBlockHeightInTexels(EFBCopyFormat format)
{
switch (format)
{
// 4-bit formats
case EFBCopyFormat::R4:
return 8;
// 8-bit formats
case EFBCopyFormat::RA4:
case EFBCopyFormat::A8:
case EFBCopyFormat::R8_0x1:
case EFBCopyFormat::R8:
case EFBCopyFormat::G8:
case EFBCopyFormat::B8:
return 4;
// 16-bit formats
case EFBCopyFormat::RA8:
case EFBCopyFormat::RGB565:
case EFBCopyFormat::RGB5A3:
case EFBCopyFormat::RG8:
case EFBCopyFormat::GB8:
return 4;
// 32-bit formats
case EFBCopyFormat::RGBA8:
return 4;
// Special formats
case EFBCopyFormat::XFB:
return 1;
default:
PanicAlertFmt("Invalid EFB Copy Format {}! (GetEFBCopyBlockHeightInTexels)", format);
return 4;
}
}
// returns bytes
int TexDecoder_GetPaletteSize(TextureFormat format)
{
switch (format)
{
case TextureFormat::C4:
return 16 * 2;
case TextureFormat::C8:
return 256 * 2;
case TextureFormat::C14X2:
return 16384 * 2;
default:
return 0;
}
}
// Get the "in memory" texture format of an EFB copy's format.
// With the exception of c4/c8/c14 paletted texture formats (which are handled elsewhere)
// this is the format the game should be using when it is drawing an EFB copy back.
TextureFormat TexDecoder_GetEFBCopyBaseFormat(EFBCopyFormat format)
{
switch (format)
{
case EFBCopyFormat::R4:
return TextureFormat::I4;
case EFBCopyFormat::A8:
case EFBCopyFormat::R8_0x1:
case EFBCopyFormat::R8:
case EFBCopyFormat::G8:
case EFBCopyFormat::B8:
return TextureFormat::I8;
case EFBCopyFormat::RA4:
return TextureFormat::IA4;
case EFBCopyFormat::RA8:
case EFBCopyFormat::RG8:
case EFBCopyFormat::GB8:
return TextureFormat::IA8;
case EFBCopyFormat::RGB565:
return TextureFormat::RGB565;
case EFBCopyFormat::RGB5A3:
return TextureFormat::RGB5A3;
case EFBCopyFormat::RGBA8:
return TextureFormat::RGBA8;
case EFBCopyFormat::XFB:
return TextureFormat::XFB;
default:
PanicAlertFmt("Invalid EFB Copy Format {}! (GetEFBCopyBaseFormat)", format);
return static_cast<TextureFormat>(format);
}
}
void TexDecoder_SetTexFmtOverlayOptions(bool enable, bool center)
{
TexFmt_Overlay_Enable = enable;
TexFmt_Overlay_Center = center;
}
static void TexDecoder_DrawOverlay(u8* dst, int width, int height, TextureFormat texformat)
{
int w = std::min(width, 40);
int h = std::min(height, 10);
int xoff = (width - w) >> 1;
int yoff = (height - h) >> 1;
if (!TexFmt_Overlay_Center)
{
xoff = 0;
yoff = 0;
}
const auto fmt_str = fmt::to_string(texformat);
for (char ch : fmt_str)
{
int xcnt = 0;
int nchar = sfont_map[static_cast<u8>(ch)];
const unsigned char* ptr = sfont_raw[nchar]; // each char is up to 9x10
for (int x = 0; x < 9; x++)
{
if (ptr[x] == 0x78)
break;
xcnt++;
}
for (int y = 0; y < 10; y++)
{
for (int x = 0; x < xcnt; x++)
{
int* dtp = (int*)dst;
dtp[(y + yoff) * width + x + xoff] = ptr[x] ? 0xFFFFFFFF : 0xFF000000;
}
ptr += 9;
}
xoff += xcnt;
}
}
void TexDecoder_Decode(u8* dst, const u8* src, int width, int height, TextureFormat texformat,
const u8* tlut, TLUTFormat tlutfmt)
{
_TexDecoder_DecodeImpl((u32*)dst, src, width, height, texformat, tlut, tlutfmt);
if (TexFmt_Overlay_Enable)
TexDecoder_DrawOverlay(dst, width, height, texformat);
}
static inline u32 DecodePixel_IA8(u16 val)
{
int a = val & 0xFF;
int i = val >> 8;
return i | (i << 8) | (i << 16) | (a << 24);
}
static inline u32 DecodePixel_RGB565(u16 val)
{
int r, g, b, a;
r = Convert5To8((val >> 11) & 0x1f);
g = Convert6To8((val >> 5) & 0x3f);
b = Convert5To8((val)&0x1f);
a = 0xFF;
return r | (g << 8) | (b << 16) | (a << 24);
}
static inline u32 DecodePixel_RGB5A3(u16 val)
{
int r, g, b, a;
if ((val & 0x8000))
{
r = Convert5To8((val >> 10) & 0x1f);
g = Convert5To8((val >> 5) & 0x1f);
b = Convert5To8((val)&0x1f);
a = 0xFF;
}
else
{
a = Convert3To8((val >> 12) & 0x7);
r = Convert4To8((val >> 8) & 0xf);
g = Convert4To8((val >> 4) & 0xf);
b = Convert4To8((val)&0xf);
}
return r | (g << 8) | (b << 16) | (a << 24);
}
static inline u32 DecodePixel_Paletted(u16 pixel, TLUTFormat tlutfmt)
{
switch (tlutfmt)
{
case TLUTFormat::IA8:
return DecodePixel_IA8(pixel);
case TLUTFormat::RGB565:
return DecodePixel_RGB565(Common::swap16(pixel));
case TLUTFormat::RGB5A3:
return DecodePixel_RGB5A3(Common::swap16(pixel));
default:
return 0;
}
}
void TexDecoder_DecodeTexel(u8* dst, const u8* src, int s, int t, int imageWidth,
TextureFormat texformat, const u8* tlut_, TLUTFormat tlutfmt)
{
/* General formula for computing texture offset
//
u16 sBlk = s / blockWidth;
u16 tBlk = t / blockHeight;
u16 widthBlks = (width / blockWidth) + 1;
u32 base = (tBlk * widthBlks + sBlk) * blockWidth * blockHeight;
u16 blkS = s & (blockWidth - 1);
u16 blkT = t & (blockHeight - 1);
u32 blkOff = blkT * blockWidth + blkS;
*/
switch (texformat)
{
case TextureFormat::C4:
{
u16 sBlk = s >> 3;
u16 tBlk = t >> 3;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5;
u16 blkS = s & 7;
u16 blkT = t & 7;
u32 blkOff = (blkT << 3) + blkS;
int rs = (blkOff & 1) ? 0 : 4;
u32 offset = base + (blkOff >> 1);
u8 val = (*(src + offset) >> rs) & 0xF;
u16* tlut = (u16*)tlut_;
*((u32*)dst) = DecodePixel_Paletted(tlut[val], tlutfmt);
}
break;
case TextureFormat::I4:
{
u16 sBlk = s >> 3;
u16 tBlk = t >> 3;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5;
u16 blkS = s & 7;
u16 blkT = t & 7;
u32 blkOff = (blkT << 3) + blkS;
int rs = (blkOff & 1) ? 0 : 4;
u32 offset = base + (blkOff >> 1);
u8 val = (*(src + offset) >> rs) & 0xF;
val = Convert4To8(val);
dst[0] = val;
dst[1] = val;
dst[2] = val;
dst[3] = val;
}
break;
case TextureFormat::I8:
{
u16 sBlk = s >> 3;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5;
u16 blkS = s & 7;
u16 blkT = t & 3;
u32 blkOff = (blkT << 3) + blkS;
u8 val = *(src + base + blkOff);
dst[0] = val;
dst[1] = val;
dst[2] = val;
dst[3] = val;
}
break;
case TextureFormat::C8:
{
u16 sBlk = s >> 3;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5;
u16 blkS = s & 7;
u16 blkT = t & 3;
u32 blkOff = (blkT << 3) + blkS;
u8 val = *(src + base + blkOff);
u16* tlut = (u16*)tlut_;
*((u32*)dst) = DecodePixel_Paletted(tlut[val], tlutfmt);
}
break;
case TextureFormat::IA4:
{
u16 sBlk = s >> 3;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5;
u16 blkS = s & 7;
u16 blkT = t & 3;
u32 blkOff = (blkT << 3) + blkS;
u8 val = *(src + base + blkOff);
const u8 a = Convert4To8(val >> 4);
const u8 l = Convert4To8(val & 0xF);
dst[0] = l;
dst[1] = l;
dst[2] = l;
dst[3] = a;
}
break;
case TextureFormat::IA8:
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blkOff = (blkT << 2) + blkS;
u32 offset = (base + blkOff) << 1;
const u16* valAddr = (u16*)(src + offset);
*((u32*)dst) = DecodePixel_IA8(*valAddr);
}
break;
case TextureFormat::C14X2:
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blkOff = (blkT << 2) + blkS;
u32 offset = (base + blkOff) << 1;
const u16* valAddr = (u16*)(src + offset);
u16 val = Common::swap16(*valAddr) & 0x3FFF;
u16* tlut = (u16*)tlut_;
*((u32*)dst) = DecodePixel_Paletted(tlut[val], tlutfmt);
}
break;
case TextureFormat::RGB565:
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blkOff = (blkT << 2) + blkS;
u32 offset = (base + blkOff) << 1;
const u16* valAddr = (u16*)(src + offset);
*((u32*)dst) = DecodePixel_RGB565(Common::swap16(*valAddr));
}
break;
case TextureFormat::RGB5A3:
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blkOff = (blkT << 2) + blkS;
u32 offset = (base + blkOff) << 1;
const u16* valAddr = (u16*)(src + offset);
*((u32*)dst) = DecodePixel_RGB5A3(Common::swap16(*valAddr));
}
break;
case TextureFormat::RGBA8:
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 5; // shift by 5 is correct
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blkOff = (blkT << 2) + blkS;
u32 offset = (base + blkOff) << 1;
const u8* valAddr = src + offset;
dst[3] = valAddr[0];
dst[0] = valAddr[1];
dst[1] = valAddr[32];
dst[2] = valAddr[33];
}
break;
case TextureFormat::CMPR:
{
u16 sDxt = s >> 2;
u16 tDxt = t >> 2;
u16 sBlk = sDxt >> 1;
u16 tBlk = tDxt >> 1;
u16 widthBlks = (imageWidth >> 3) + 1;
u32 base = (tBlk * widthBlks + sBlk) << 2;
u16 blkS = sDxt & 1;
u16 blkT = tDxt & 1;
u32 blkOff = (blkT << 1) + blkS;
u32 offset = (base + blkOff) << 3;
const DXTBlock* dxtBlock = (const DXTBlock*)(src + offset);
u16 c1 = Common::swap16(dxtBlock->color1);
u16 c2 = Common::swap16(dxtBlock->color2);
int blue1 = Convert5To8(c1 & 0x1F);
int blue2 = Convert5To8(c2 & 0x1F);
int green1 = Convert6To8((c1 >> 5) & 0x3F);
int green2 = Convert6To8((c2 >> 5) & 0x3F);
int red1 = Convert5To8((c1 >> 11) & 0x1F);
int red2 = Convert5To8((c2 >> 11) & 0x1F);
u16 ss = s & 3;
u16 tt = t & 3;
int colorSel = dxtBlock->lines[tt];
int rs = 6 - (ss << 1);
colorSel = (colorSel >> rs) & 3;
colorSel |= c1 > c2 ? 0 : 4;
u32 color = 0;
switch (colorSel)
{
case 0:
case 4:
color = MakeRGBA(red1, green1, blue1, 255);
break;
case 1:
case 5:
color = MakeRGBA(red2, green2, blue2, 255);
break;
case 2:
color = MakeRGBA(DXTBlend(red2, red1), DXTBlend(green2, green1), DXTBlend(blue2, blue1), 255);
break;
case 3:
color = MakeRGBA(DXTBlend(red1, red2), DXTBlend(green1, green2), DXTBlend(blue1, blue2), 255);
break;
case 6:
color = MakeRGBA((red1 + red2) / 2, (green1 + green2) / 2, (blue1 + blue2) / 2, 255);
break;
case 7:
// color[3] is the same as color[2] (average of both colors), but transparent.
// This differs from DXT1 where color[3] is transparent black.
color = MakeRGBA((red1 + red2) / 2, (green1 + green2) / 2, (blue1 + blue2) / 2, 0);
break;
default:
color = 0;
break;
}
*((u32*)dst) = color;
}
break;
case TextureFormat::XFB:
{
size_t offset = (t * imageWidth + (s & (~1))) * 2;
// We do this one color sample (aka 2 RGB pixles) at a time
int Y = int((s & 1) == 0 ? src[offset] : src[offset + 2]) - 16;
int U = int(src[offset + 1]) - 128;
int V = int(src[offset + 3]) - 128;
// We do the inverse BT.601 conversion for YCbCr to RGB
// http://www.equasys.de/colorconversion.html#YCbCr-RGBColorFormatConversion
// TODO: Use more precise numbers for this conversion (although on real hardware, the XFB isn't
// in a real texture format, so does this conversion actually ever happen?)
u8 R = std::clamp(int(1.164f * Y + 1.596f * V), 0, 255);
u8 G = std::clamp(int(1.164f * Y - 0.392f * U - 0.813f * V), 0, 255);
u8 B = std::clamp(int(1.164f * Y + 2.017f * U), 0, 255);
dst[t * imageWidth + s] = 0xff000000 | B << 16 | G << 8 | R;
}
break;
}
}
void TexDecoder_DecodeTexelRGBA8FromTmem(u8* dst, const u8* src_ar, const u8* src_gb, int s, int t,
int imageWidth)
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks =
(imageWidth >> 2) + 1; // TODO: Looks wrong. Shouldn't this be ((imageWidth-1)>>2)+1 ?
u32 base_ar = (tBlk * widthBlks + sBlk) << 4;
u32 base_gb = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blk_off = (blkT << 2) + blkS;
u32 offset_ar = (base_ar + blk_off) << 1;
u32 offset_gb = (base_gb + blk_off) << 1;
const u8* val_addr_ar = src_ar + offset_ar;
const u8* val_addr_gb = src_gb + offset_gb;
dst[3] = val_addr_ar[0]; // A
dst[0] = val_addr_ar[1]; // R
dst[1] = val_addr_gb[0]; // G
dst[2] = val_addr_gb[1]; // B
}
void TexDecoder_DecodeRGBA8FromTmem(u8* dst, const u8* src_ar, const u8* src_gb, int width,
int height)
{
// TODO for someone who cares: Make this less slow!
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
TexDecoder_DecodeTexelRGBA8FromTmem(dst, src_ar, src_gb, x, y, width - 1);
dst += 4;
}
}
}
void TexDecoder_DecodeXFB(u8* dst, const u8* src, u32 width, u32 height, u32 stride)
{
const u8* src_ptr = src;
u8* dst_ptr = dst;
for (u32 y = 0; y < height; y++)
{
const u8* row_ptr = src_ptr;
for (u32 x = 0; x < width; x += 2)
{
// We do this one color sample (aka 2 RGB pixels) at a time
int Y1 = int(*(row_ptr++)) - 16;
int U = int(*(row_ptr++)) - 128;
int Y2 = int(*(row_ptr++)) - 16;
int V = int(*(row_ptr++)) - 128;
// We do the inverse BT.601 conversion for YCbCr to RGB
// http://www.equasys.de/colorconversion.html#YCbCr-RGBColorFormatConversion
// TODO: Use more precise numbers for this conversion (although on real hardware, the XFB
// isn't in a real texture format, so does this conversion actually ever happen?)
u8 R1 = static_cast<u8>(std::clamp(int(1.164f * Y1 + 1.596f * V), 0, 255));
u8 G1 = static_cast<u8>(std::clamp(int(1.164f * Y1 - 0.392f * U - 0.813f * V), 0, 255));
u8 B1 = static_cast<u8>(std::clamp(int(1.164f * Y1 + 2.017f * U), 0, 255));
u8 R2 = static_cast<u8>(std::clamp(int(1.164f * Y2 + 1.596f * V), 0, 255));
u8 G2 = static_cast<u8>(std::clamp(int(1.164f * Y2 - 0.392f * U - 0.813f * V), 0, 255));
u8 B2 = static_cast<u8>(std::clamp(int(1.164f * Y2 + 2.017f * U), 0, 255));
u32 rgba = 0xff000000 | B1 << 16 | G1 << 8 | R1;
std::memcpy(dst_ptr, &rgba, sizeof(rgba));
dst_ptr += sizeof(rgba);
rgba = 0xff000000 | B2 << 16 | G2 << 8 | R2;
std::memcpy(dst_ptr, &rgba, sizeof(rgba));
dst_ptr += sizeof(rgba);
}
src_ptr += stride;
}
}
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