/*-------------------------------------------------------------------------
* drawElements Quality Program Tester Core
* ----------------------------------------
*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*//*!
* \file
* \brief Compressed Texture Utilities.
*//*--------------------------------------------------------------------*/
#include "tcuCompressedTexture.hpp"
#include "tcuTextureUtil.hpp"
#include "deStringUtil.hpp"
#include "deFloat16.h"
#include <algorithm>
namespace tcu
{
namespace
{
enum { ASTC_BLOCK_SIZE_BYTES = 128/8 };
template <typename T, typename Y>
struct isSameType { enum { V = 0 }; };
template <typename T>
struct isSameType<T, T> { enum { V = 1 }; };
} // anonymous
int getBlockSize (CompressedTexFormat format)
{
if (isAstcFormat(format))
{
return ASTC_BLOCK_SIZE_BYTES;
}
else if (isEtcFormat(format))
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ETC1_RGB8: return 8;
case COMPRESSEDTEXFORMAT_EAC_R11: return 8;
case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: return 8;
case COMPRESSEDTEXFORMAT_EAC_RG11: return 16;
case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: return 16;
case COMPRESSEDTEXFORMAT_ETC2_RGB8: return 8;
case COMPRESSEDTEXFORMAT_ETC2_SRGB8: return 8;
case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: return 8;
case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: return 8;
case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: return 16;
case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: return 16;
default:
DE_ASSERT(false);
return -1;
}
}
else
{
DE_ASSERT(false);
return -1;
}
}
IVec3 getBlockPixelSize (CompressedTexFormat format)
{
if (isEtcFormat(format))
{
return IVec3(4, 4, 1);
}
else if (isAstcFormat(format))
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA: return IVec3(4, 4, 1);
case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA: return IVec3(5, 4, 1);
case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA: return IVec3(5, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA: return IVec3(6, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA: return IVec3(6, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA: return IVec3(8, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA: return IVec3(8, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA: return IVec3(8, 8, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA: return IVec3(10, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA: return IVec3(10, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA: return IVec3(10, 8, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA: return IVec3(10, 10, 1);
case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA: return IVec3(12, 10, 1);
case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA: return IVec3(12, 12, 1);
case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8: return IVec3(4, 4, 1);
case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8: return IVec3(5, 4, 1);
case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8: return IVec3(5, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8: return IVec3(6, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8: return IVec3(6, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8: return IVec3(8, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8: return IVec3(8, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8: return IVec3(8, 8, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8: return IVec3(10, 5, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8: return IVec3(10, 6, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8: return IVec3(10, 8, 1);
case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8: return IVec3(10, 10, 1);
case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8: return IVec3(12, 10, 1);
case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8: return IVec3(12, 12, 1);
default:
DE_ASSERT(false);
return IVec3();
}
}
else
{
DE_ASSERT(false);
return IVec3(-1);
}
}
bool isEtcFormat (CompressedTexFormat format)
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ETC1_RGB8:
case COMPRESSEDTEXFORMAT_EAC_R11:
case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11:
case COMPRESSEDTEXFORMAT_EAC_RG11:
case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11:
case COMPRESSEDTEXFORMAT_ETC2_RGB8:
case COMPRESSEDTEXFORMAT_ETC2_SRGB8:
case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8:
case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8:
return true;
default:
return false;
}
}
bool isAstcFormat (CompressedTexFormat format)
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8:
return true;
default:
return false;
}
}
bool isAstcSRGBFormat (CompressedTexFormat format)
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8:
return true;
default:
return false;
}
}
TextureFormat getUncompressedFormat (CompressedTexFormat format)
{
if (isEtcFormat(format))
{
switch (format)
{
case COMPRESSEDTEXFORMAT_ETC1_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_EAC_R11: return TextureFormat(TextureFormat::R, TextureFormat::UNORM_INT16);
case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: return TextureFormat(TextureFormat::R, TextureFormat::SNORM_INT16);
case COMPRESSEDTEXFORMAT_EAC_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::UNORM_INT16);
case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::SNORM_INT16);
case COMPRESSEDTEXFORMAT_ETC2_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_ETC2_SRGB8: return TextureFormat(TextureFormat::sRGB, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8);
case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8);
default:
DE_ASSERT(false);
return TextureFormat();
}
}
else if (isAstcFormat(format))
{
if (isAstcSRGBFormat(format))
return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8);
else
return TextureFormat(TextureFormat::RGBA, TextureFormat::HALF_FLOAT);
}
else
{
DE_ASSERT(false);
return TextureFormat();
}
}
CompressedTexFormat getAstcFormatByBlockSize (const IVec3& size, bool isSRGB)
{
if (size.z() > 1)
throw InternalError("3D ASTC textures not currently supported");
for (int fmtI = 0; fmtI < COMPRESSEDTEXFORMAT_LAST; fmtI++)
{
const CompressedTexFormat fmt = (CompressedTexFormat)fmtI;
if (isAstcFormat(fmt) && getBlockPixelSize(fmt) == size && isAstcSRGBFormat(fmt) == isSRGB)
return fmt;
}
throw InternalError("Invalid ASTC block size " + de::toString(size.x()) + "x" + de::toString(size.y()) + "x" + de::toString(size.z()));
}
namespace
{
inline int divRoundUp (int a, int b)
{
return a/b + ((a%b) ? 1 : 0);
}
// \todo [2013-08-06 nuutti] ETC and ASTC decompression codes are rather unrelated, and are already in their own "private" namespaces - should this be split to multiple files?
namespace EtcDecompressInternal
{
enum
{
ETC2_BLOCK_WIDTH = 4,
ETC2_BLOCK_HEIGHT = 4,
ETC2_UNCOMPRESSED_PIXEL_SIZE_A8 = 1,
ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 = 2,
ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 = 4,
ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8 = 3,
ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 = 4,
ETC2_UNCOMPRESSED_BLOCK_SIZE_A8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8,
ETC2_UNCOMPRESSED_BLOCK_SIZE_R11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11,
ETC2_UNCOMPRESSED_BLOCK_SIZE_RG11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11,
ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8,
ETC2_UNCOMPRESSED_BLOCK_SIZE_RGBA8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8
};
inline deUint64 get64BitBlock (const deUint8* src, int blockNdx)
{
// Stored in big-endian form.
deUint64 block = 0;
for (int i = 0; i < 8; i++)
block = (block << 8ull) | (deUint64)(src[blockNdx*8+i]);
return block;
}
// Return the first 64 bits of a 128 bit block.
inline deUint64 get128BitBlockStart (const deUint8* src, int blockNdx)
{
return get64BitBlock(src, 2*blockNdx);
}
// Return the last 64 bits of a 128 bit block.
inline deUint64 get128BitBlockEnd (const deUint8* src, int blockNdx)
{
return get64BitBlock(src, 2*blockNdx + 1);
}
inline deUint32 getBit (deUint64 src, int bit)
{
return (src >> bit) & 1;
}
inline deUint32 getBits (deUint64 src, int low, int high)
{
const int numBits = (high-low) + 1;
DE_ASSERT(de::inRange(numBits, 1, 32));
if (numBits < 32)
return (src >> low) & ((1u<<numBits)-1);
else
return (src >> low) & 0xFFFFFFFFu;
}
inline deUint8 extend4To8 (deUint8 src)
{
DE_ASSERT((src & ~((1<<4)-1)) == 0);
return (src << 4) | src;
}
inline deUint8 extend5To8 (deUint8 src)
{
DE_ASSERT((src & ~((1<<5)-1)) == 0);
return (src << 3) | (src >> 2);
}
inline deUint8 extend6To8 (deUint8 src)
{
DE_ASSERT((src & ~((1<<6)-1)) == 0);
return (src << 2) | (src >> 4);
}
inline deUint8 extend7To8 (deUint8 src)
{
DE_ASSERT((src & ~((1<<7)-1)) == 0);
return (src << 1) | (src >> 6);
}
inline deInt8 extendSigned3To8 (deUint8 src)
{
const bool isNeg = (src & (1<<2)) != 0;
return (deInt8)((isNeg ? ~((1<<3)-1) : 0) | src);
}
inline deUint8 extend5Delta3To8 (deUint8 base5, deUint8 delta3)
{
const deUint8 t = (deUint8)((deInt8)base5 + extendSigned3To8(delta3));
return extend5To8(t);
}
inline deUint16 extend11To16 (deUint16 src)
{
DE_ASSERT((src & ~((1<<11)-1)) == 0);
return (src << 5) | (src >> 6);
}
inline deInt16 extend11To16WithSign (deInt16 src)
{
if (src < 0)
return -(deInt16)extend11To16(-src);
else
return (deInt16)extend11To16(src);
}
void decompressETC1Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src)
{
const int diffBit = (int)getBit(src, 33);
const int flipBit = (int)getBit(src, 32);
const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) };
deUint8 baseR[2];
deUint8 baseG[2];
deUint8 baseB[2];
if (diffBit == 0)
{
// Individual mode.
baseR[0] = extend4To8((deUint8)getBits(src, 60, 63));
baseR[1] = extend4To8((deUint8)getBits(src, 56, 59));
baseG[0] = extend4To8((deUint8)getBits(src, 52, 55));
baseG[1] = extend4To8((deUint8)getBits(src, 48, 51));
baseB[0] = extend4To8((deUint8)getBits(src, 44, 47));
baseB[1] = extend4To8((deUint8)getBits(src, 40, 43));
}
else
{
// Differential mode (diffBit == 1).
deUint8 bR = (deUint8)getBits(src, 59, 63); // 5b
deUint8 dR = (deUint8)getBits(src, 56, 58); // 3b
deUint8 bG = (deUint8)getBits(src, 51, 55);
deUint8 dG = (deUint8)getBits(src, 48, 50);
deUint8 bB = (deUint8)getBits(src, 43, 47);
deUint8 dB = (deUint8)getBits(src, 40, 42);
baseR[0] = extend5To8(bR);
baseG[0] = extend5To8(bG);
baseB[0] = extend5To8(bB);
baseR[1] = extend5Delta3To8(bR, dR);
baseG[1] = extend5Delta3To8(bG, dG);
baseB[1] = extend5Delta3To8(bB, dB);
}
static const int modifierTable[8][4] =
{
// 00 01 10 11
{ 2, 8, -2, -8 },
{ 5, 17, -5, -17 },
{ 9, 29, -9, -29 },
{ 13, 42, -13, -42 },
{ 18, 60, -18, -60 },
{ 24, 80, -24, -80 },
{ 33, 106, -33, -106 },
{ 47, 183, -47, -183 }
};
// Write final pixels.
for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++)
{
const int x = pixelNdx / ETC2_BLOCK_HEIGHT;
const int y = pixelNdx % ETC2_BLOCK_HEIGHT;
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8;
const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0;
const deUint32 tableNdx = table[subBlock];
const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx);
const int modifier = modifierTable[tableNdx][modifierNdx];
dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255);
dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255);
dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255);
}
}
// if alphaMode is true, do PUNCHTHROUGH and store alpha to alphaDst; otherwise do ordinary ETC2 RGB8.
void decompressETC2Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src, deUint8 alphaDst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], bool alphaMode)
{
enum Etc2Mode
{
MODE_INDIVIDUAL = 0,
MODE_DIFFERENTIAL,
MODE_T,
MODE_H,
MODE_PLANAR,
MODE_LAST
};
const int diffOpaqueBit = (int)getBit(src, 33);
const deInt8 selBR = (deInt8)getBits(src, 59, 63); // 5 bits.
const deInt8 selBG = (deInt8)getBits(src, 51, 55);
const deInt8 selBB = (deInt8)getBits(src, 43, 47);
const deInt8 selDR = extendSigned3To8((deUint8)getBits(src, 56, 58)); // 3 bits.
const deInt8 selDG = extendSigned3To8((deUint8)getBits(src, 48, 50));
const deInt8 selDB = extendSigned3To8((deUint8)getBits(src, 40, 42));
Etc2Mode mode;
if (!alphaMode && diffOpaqueBit == 0)
mode = MODE_INDIVIDUAL;
else if (!de::inRange(selBR + selDR, 0, 31))
mode = MODE_T;
else if (!de::inRange(selBG + selDG, 0, 31))
mode = MODE_H;
else if (!de::inRange(selBB + selDB, 0, 31))
mode = MODE_PLANAR;
else
mode = MODE_DIFFERENTIAL;
if (mode == MODE_INDIVIDUAL || mode == MODE_DIFFERENTIAL)
{
// Individual and differential modes have some steps in common, handle them here.
static const int modifierTable[8][4] =
{
// 00 01 10 11
{ 2, 8, -2, -8 },
{ 5, 17, -5, -17 },
{ 9, 29, -9, -29 },
{ 13, 42, -13, -42 },
{ 18, 60, -18, -60 },
{ 24, 80, -24, -80 },
{ 33, 106, -33, -106 },
{ 47, 183, -47, -183 }
};
const int flipBit = (int)getBit(src, 32);
const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) };
deUint8 baseR[2];
deUint8 baseG[2];
deUint8 baseB[2];
if (mode == MODE_INDIVIDUAL)
{
// Individual mode, initial values.
baseR[0] = extend4To8((deUint8)getBits(src, 60, 63));
baseR[1] = extend4To8((deUint8)getBits(src, 56, 59));
baseG[0] = extend4To8((deUint8)getBits(src, 52, 55));
baseG[1] = extend4To8((deUint8)getBits(src, 48, 51));
baseB[0] = extend4To8((deUint8)getBits(src, 44, 47));
baseB[1] = extend4To8((deUint8)getBits(src, 40, 43));
}
else
{
// Differential mode, initial values.
baseR[0] = extend5To8(selBR);
baseG[0] = extend5To8(selBG);
baseB[0] = extend5To8(selBB);
baseR[1] = extend5To8((deUint8)(selBR + selDR));
baseG[1] = extend5To8((deUint8)(selBG + selDG));
baseB[1] = extend5To8((deUint8)(selBB + selDB));
}
// Write final pixels for individual or differential mode.
for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++)
{
const int x = pixelNdx / ETC2_BLOCK_HEIGHT;
const int y = pixelNdx % ETC2_BLOCK_HEIGHT;
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8;
const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0;
const deUint32 tableNdx = table[subBlock];
const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx);
const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version.
// If doing PUNCHTHROUGH version (alphaMode), opaque bit may affect colors.
if (alphaMode && diffOpaqueBit == 0 && modifierNdx == 2)
{
dst[dstOffset+0] = 0;
dst[dstOffset+1] = 0;
dst[dstOffset+2] = 0;
alphaDst[alphaDstOffset] = 0;
}
else
{
int modifier;
// PUNCHTHROUGH version and opaque bit may also affect modifiers.
if (alphaMode && diffOpaqueBit == 0 && (modifierNdx == 0 || modifierNdx == 2))
modifier = 0;
else
modifier = modifierTable[tableNdx][modifierNdx];
dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255);
dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255);
dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255);
if (alphaMode)
alphaDst[alphaDstOffset] = 255;
}
}
}
else if (mode == MODE_T || mode == MODE_H)
{
// T and H modes have some steps in common, handle them here.
static const int distTable[8] = { 3, 6, 11, 16, 23, 32, 41, 64 };
deUint8 paintR[4];
deUint8 paintG[4];
deUint8 paintB[4];
if (mode == MODE_T)
{
// T mode, calculate paint values.
const deUint8 R1a = (deUint8)getBits(src, 59, 60);
const deUint8 R1b = (deUint8)getBits(src, 56, 57);
const deUint8 G1 = (deUint8)getBits(src, 52, 55);
const deUint8 B1 = (deUint8)getBits(src, 48, 51);
const deUint8 R2 = (deUint8)getBits(src, 44, 47);
const deUint8 G2 = (deUint8)getBits(src, 40, 43);
const deUint8 B2 = (deUint8)getBits(src, 36, 39);
const deUint32 distNdx = (getBits(src, 34, 35) << 1) | getBit(src, 32);
const int dist = distTable[distNdx];
paintR[0] = extend4To8((R1a << 2) | R1b);
paintG[0] = extend4To8(G1);
paintB[0] = extend4To8(B1);
paintR[2] = extend4To8(R2);
paintG[2] = extend4To8(G2);
paintB[2] = extend4To8(B2);
paintR[1] = (deUint8)deClamp32((int)paintR[2] + dist, 0, 255);
paintG[1] = (deUint8)deClamp32((int)paintG[2] + dist, 0, 255);
paintB[1] = (deUint8)deClamp32((int)paintB[2] + dist, 0, 255);
paintR[3] = (deUint8)deClamp32((int)paintR[2] - dist, 0, 255);
paintG[3] = (deUint8)deClamp32((int)paintG[2] - dist, 0, 255);
paintB[3] = (deUint8)deClamp32((int)paintB[2] - dist, 0, 255);
}
else
{
// H mode, calculate paint values.
const deUint8 R1 = (deUint8)getBits(src, 59, 62);
const deUint8 G1a = (deUint8)getBits(src, 56, 58);
const deUint8 G1b = (deUint8)getBit(src, 52);
const deUint8 B1a = (deUint8)getBit(src, 51);
const deUint8 B1b = (deUint8)getBits(src, 47, 49);
const deUint8 R2 = (deUint8)getBits(src, 43, 46);
const deUint8 G2 = (deUint8)getBits(src, 39, 42);
const deUint8 B2 = (deUint8)getBits(src, 35, 38);
deUint8 baseR[2];
deUint8 baseG[2];
deUint8 baseB[2];
deUint32 baseValue[2];
deUint32 distNdx;
int dist;
baseR[0] = extend4To8(R1);
baseG[0] = extend4To8((G1a << 1) | G1b);
baseB[0] = extend4To8((B1a << 3) | B1b);
baseR[1] = extend4To8(R2);
baseG[1] = extend4To8(G2);
baseB[1] = extend4To8(B2);
baseValue[0] = (((deUint32)baseR[0]) << 16) | (((deUint32)baseG[0]) << 8) | baseB[0];
baseValue[1] = (((deUint32)baseR[1]) << 16) | (((deUint32)baseG[1]) << 8) | baseB[1];
distNdx = (getBit(src, 34) << 2) | (getBit(src, 32) << 1) | (deUint32)(baseValue[0] >= baseValue[1]);
dist = distTable[distNdx];
paintR[0] = (deUint8)deClamp32((int)baseR[0] + dist, 0, 255);
paintG[0] = (deUint8)deClamp32((int)baseG[0] + dist, 0, 255);
paintB[0] = (deUint8)deClamp32((int)baseB[0] + dist, 0, 255);
paintR[1] = (deUint8)deClamp32((int)baseR[0] - dist, 0, 255);
paintG[1] = (deUint8)deClamp32((int)baseG[0] - dist, 0, 255);
paintB[1] = (deUint8)deClamp32((int)baseB[0] - dist, 0, 255);
paintR[2] = (deUint8)deClamp32((int)baseR[1] + dist, 0, 255);
paintG[2] = (deUint8)deClamp32((int)baseG[1] + dist, 0, 255);
paintB[2] = (deUint8)deClamp32((int)baseB[1] + dist, 0, 255);
paintR[3] = (deUint8)deClamp32((int)baseR[1] - dist, 0, 255);
paintG[3] = (deUint8)deClamp32((int)baseG[1] - dist, 0, 255);
paintB[3] = (deUint8)deClamp32((int)baseB[1] - dist, 0, 255);
}
// Write final pixels for T or H mode.
for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++)
{
const int x = pixelNdx / ETC2_BLOCK_HEIGHT;
const int y = pixelNdx % ETC2_BLOCK_HEIGHT;
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8;
const deUint32 paintNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx);
const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version.
if (alphaMode && diffOpaqueBit == 0 && paintNdx == 2)
{
dst[dstOffset+0] = 0;
dst[dstOffset+1] = 0;
dst[dstOffset+2] = 0;
alphaDst[alphaDstOffset] = 0;
}
else
{
dst[dstOffset+0] = (deUint8)deClamp32((int)paintR[paintNdx], 0, 255);
dst[dstOffset+1] = (deUint8)deClamp32((int)paintG[paintNdx], 0, 255);
dst[dstOffset+2] = (deUint8)deClamp32((int)paintB[paintNdx], 0, 255);
if (alphaMode)
alphaDst[alphaDstOffset] = 255;
}
}
}
else
{
// Planar mode.
const deUint8 GO1 = (deUint8)getBit(src, 56);
const deUint8 GO2 = (deUint8)getBits(src, 49, 54);
const deUint8 BO1 = (deUint8)getBit(src, 48);
const deUint8 BO2 = (deUint8)getBits(src, 43, 44);
const deUint8 BO3 = (deUint8)getBits(src, 39, 41);
const deUint8 RH1 = (deUint8)getBits(src, 34, 38);
const deUint8 RH2 = (deUint8)getBit(src, 32);
const deUint8 RO = extend6To8((deUint8)getBits(src, 57, 62));
const deUint8 GO = extend7To8((GO1 << 6) | GO2);
const deUint8 BO = extend6To8((BO1 << 5) | (BO2 << 3) | BO3);
const deUint8 RH = extend6To8((RH1 << 1) | RH2);
const deUint8 GH = extend7To8((deUint8)getBits(src, 25, 31));
const deUint8 BH = extend6To8((deUint8)getBits(src, 19, 24));
const deUint8 RV = extend6To8((deUint8)getBits(src, 13, 18));
const deUint8 GV = extend7To8((deUint8)getBits(src, 6, 12));
const deUint8 BV = extend6To8((deUint8)getBits(src, 0, 5));
// Write final pixels for planar mode.
for (int y = 0; y < 4; y++)
{
for (int x = 0; x < 4; x++)
{
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8;
const int unclampedR = (x * ((int)RH-(int)RO) + y * ((int)RV-(int)RO) + 4*(int)RO + 2) >> 2;
const int unclampedG = (x * ((int)GH-(int)GO) + y * ((int)GV-(int)GO) + 4*(int)GO + 2) >> 2;
const int unclampedB = (x * ((int)BH-(int)BO) + y * ((int)BV-(int)BO) + 4*(int)BO + 2) >> 2;
const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version.
dst[dstOffset+0] = (deUint8)deClamp32(unclampedR, 0, 255);
dst[dstOffset+1] = (deUint8)deClamp32(unclampedG, 0, 255);
dst[dstOffset+2] = (deUint8)deClamp32(unclampedB, 0, 255);
if (alphaMode)
alphaDst[alphaDstOffset] = 255;
}
}
}
}
void decompressEAC8Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], deUint64 src)
{
static const int modifierTable[16][8] =
{
{-3, -6, -9, -15, 2, 5, 8, 14},
{-3, -7, -10, -13, 2, 6, 9, 12},
{-2, -5, -8, -13, 1, 4, 7, 12},
{-2, -4, -6, -13, 1, 3, 5, 12},
{-3, -6, -8, -12, 2, 5, 7, 11},
{-3, -7, -9, -11, 2, 6, 8, 10},
{-4, -7, -8, -11, 3, 6, 7, 10},
{-3, -5, -8, -11, 2, 4, 7, 10},
{-2, -6, -8, -10, 1, 5, 7, 9},
{-2, -5, -8, -10, 1, 4, 7, 9},
{-2, -4, -8, -10, 1, 3, 7, 9},
{-2, -5, -7, -10, 1, 4, 6, 9},
{-3, -4, -7, -10, 2, 3, 6, 9},
{-1, -2, -3, -10, 0, 1, 2, 9},
{-4, -6, -8, -9, 3, 5, 7, 8},
{-3, -5, -7, -9, 2, 4, 6, 8}
};
const deUint8 baseCodeword = (deUint8)getBits(src, 56, 63);
const deUint8 multiplier = (deUint8)getBits(src, 52, 55);
const deUint32 tableNdx = getBits(src, 48, 51);
for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++)
{
const int x = pixelNdx / ETC2_BLOCK_HEIGHT;
const int y = pixelNdx % ETC2_BLOCK_HEIGHT;
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8;
const int pixelBitNdx = 45 - 3*pixelNdx;
const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx);
const int modifier = modifierTable[tableNdx][modifierNdx];
dst[dstOffset] = (deUint8)deClamp32((int)baseCodeword + (int)multiplier*modifier, 0, 255);
}
}
void decompressEAC11Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11], deUint64 src, bool signedMode)
{
static const int modifierTable[16][8] =
{
{-3, -6, -9, -15, 2, 5, 8, 14},
{-3, -7, -10, -13, 2, 6, 9, 12},
{-2, -5, -8, -13, 1, 4, 7, 12},
{-2, -4, -6, -13, 1, 3, 5, 12},
{-3, -6, -8, -12, 2, 5, 7, 11},
{-3, -7, -9, -11, 2, 6, 8, 10},
{-4, -7, -8, -11, 3, 6, 7, 10},
{-3, -5, -8, -11, 2, 4, 7, 10},
{-2, -6, -8, -10, 1, 5, 7, 9},
{-2, -5, -8, -10, 1, 4, 7, 9},
{-2, -4, -8, -10, 1, 3, 7, 9},
{-2, -5, -7, -10, 1, 4, 6, 9},
{-3, -4, -7, -10, 2, 3, 6, 9},
{-1, -2, -3, -10, 0, 1, 2, 9},
{-4, -6, -8, -9, 3, 5, 7, 8},
{-3, -5, -7, -9, 2, 4, 6, 8}
};
const deInt32 multiplier = (deInt32)getBits(src, 52, 55);
const deInt32 tableNdx = (deInt32)getBits(src, 48, 51);
deInt32 baseCodeword = (deInt32)getBits(src, 56, 63);
if (signedMode)
{
if (baseCodeword > 127)
baseCodeword -= 256;
if (baseCodeword == -128)
baseCodeword = -127;
}
for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++)
{
const int x = pixelNdx / ETC2_BLOCK_HEIGHT;
const int y = pixelNdx % ETC2_BLOCK_HEIGHT;
const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11;
const int pixelBitNdx = 45 - 3*pixelNdx;
const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx);
const int modifier = modifierTable[tableNdx][modifierNdx];
if (signedMode)
{
deInt16 value;
if (multiplier != 0)
value = (deInt16)deClamp32(baseCodeword*8 + multiplier*modifier*8, -1023, 1023);
else
value = (deInt16)deClamp32(baseCodeword*8 + modifier, -1023, 1023);
*((deInt16*)(dst + dstOffset)) = value;
}
else
{
deUint16 value;
if (multiplier != 0)
value = (deUint16)deClamp32(baseCodeword*8 + 4 + multiplier*modifier*8, 0, 2047);
else
value= (deUint16)deClamp32(baseCodeword*8 + 4 + modifier, 0, 2047);
*((deUint16*)(dst + dstOffset)) = value;
}
}
}
} // EtcDecompressInternal
void decompressETC1 (const PixelBufferAccess& dst, const deUint8* src)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const deUint64 compressedBlock = get64BitBlock(src, 0);
decompressETC1Block(dstPtr, compressedBlock);
}
void decompressETC2 (const PixelBufferAccess& dst, const deUint8* src)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const deUint64 compressedBlock = get64BitBlock(src, 0);
decompressETC2Block(dstPtr, compressedBlock, NULL, false);
}
void decompressETC2_EAC_RGBA8 (const PixelBufferAccess& dst, const deUint8* src)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const int dstRowPitch = dst.getRowPitch();
const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8;
const deUint64 compressedBlockAlpha = get128BitBlockStart(src, 0);
const deUint64 compressedBlockRGB = get128BitBlockEnd(src, 0);
deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8];
deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8];
// Decompress.
decompressETC2Block(uncompressedBlockRGB, compressedBlockRGB, NULL, false);
decompressEAC8Block(uncompressedBlockAlpha, compressedBlockAlpha);
// Write to dst.
for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++)
{
for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++)
{
const deUint8* const srcPixelRGB = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8];
const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8];
deUint8* const dstPixel = dstPtr + y*dstRowPitch + x*dstPixelSize;
DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4);
dstPixel[0] = srcPixelRGB[0];
dstPixel[1] = srcPixelRGB[1];
dstPixel[2] = srcPixelRGB[2];
dstPixel[3] = srcPixelAlpha[0];
}
}
}
void decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (const PixelBufferAccess& dst, const deUint8* src)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const int dstRowPitch = dst.getRowPitch();
const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8;
const deUint64 compressedBlockRGBA = get64BitBlock(src, 0);
deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8];
deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8];
// Decompress.
decompressETC2Block(uncompressedBlockRGB, compressedBlockRGBA, uncompressedBlockAlpha, DE_TRUE);
// Write to dst.
for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++)
{
for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++)
{
const deUint8* const srcPixel = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8];
const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8];
deUint8* const dstPixel = dstPtr + y*dstRowPitch + x*dstPixelSize;
DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4);
dstPixel[0] = srcPixel[0];
dstPixel[1] = srcPixel[1];
dstPixel[2] = srcPixel[2];
dstPixel[3] = srcPixelAlpha[0];
}
}
}
void decompressEAC_R11 (const PixelBufferAccess& dst, const deUint8* src, bool signedMode)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const int dstRowPitch = dst.getRowPitch();
const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_R11;
const deUint64 compressedBlock = get64BitBlock(src, 0);
deUint8 uncompressedBlock[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11];
// Decompress.
decompressEAC11Block(uncompressedBlock, compressedBlock, signedMode);
// Write to dst.
for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++)
{
for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++)
{
DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 == 2);
if (signedMode)
{
const deInt16* const srcPixel = (deInt16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
deInt16* const dstPixel = (deInt16*)(dstPtr + y*dstRowPitch + x*dstPixelSize);
dstPixel[0] = extend11To16WithSign(srcPixel[0]);
}
else
{
const deUint16* const srcPixel = (deUint16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
deUint16* const dstPixel = (deUint16*)(dstPtr + y*dstRowPitch + x*dstPixelSize);
dstPixel[0] = extend11To16(srcPixel[0]);
}
}
}
}
void decompressEAC_RG11 (const PixelBufferAccess& dst, const deUint8* src, bool signedMode)
{
using namespace EtcDecompressInternal;
deUint8* const dstPtr = (deUint8*)dst.getDataPtr();
const int dstRowPitch = dst.getRowPitch();
const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11;
const deUint64 compressedBlockR = get128BitBlockStart(src, 0);
const deUint64 compressedBlockG = get128BitBlockEnd(src, 0);
deUint8 uncompressedBlockR[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11];
deUint8 uncompressedBlockG[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11];
// Decompress.
decompressEAC11Block(uncompressedBlockR, compressedBlockR, signedMode);
decompressEAC11Block(uncompressedBlockG, compressedBlockG, signedMode);
// Write to dst.
for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++)
{
for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++)
{
DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 == 4);
if (signedMode)
{
const deInt16* const srcPixelR = (deInt16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
const deInt16* const srcPixelG = (deInt16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
deInt16* const dstPixel = (deInt16*)(dstPtr + y*dstRowPitch + x*dstPixelSize);
dstPixel[0] = extend11To16WithSign(srcPixelR[0]);
dstPixel[1] = extend11To16WithSign(srcPixelG[0]);
}
else
{
const deUint16* const srcPixelR = (deUint16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
const deUint16* const srcPixelG = (deUint16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11];
deUint16* const dstPixel = (deUint16*)(dstPtr + y*dstRowPitch + x*dstPixelSize);
dstPixel[0] = extend11To16(srcPixelR[0]);
dstPixel[1] = extend11To16(srcPixelG[0]);
}
}
}
}
namespace ASTCDecompressInternal
{
enum
{
ASTC_MAX_BLOCK_WIDTH = 12,
ASTC_MAX_BLOCK_HEIGHT = 12
};
inline deUint32 getBit (deUint32 src, int ndx)
{
DE_ASSERT(de::inBounds(ndx, 0, 32));
return (src >> ndx) & 1;
}
inline deUint32 getBits (deUint32 src, int low, int high)
{
const int numBits = (high-low) + 1;
DE_ASSERT(de::inRange(numBits, 1, 32));
return (src >> low) & ((1u<<numBits)-1);
}
inline bool isBitSet (deUint32 src, int ndx)
{
return getBit(src, ndx) != 0;
}
inline deUint32 reverseBits (deUint32 src, int numBits)
{
DE_ASSERT(de::inRange(numBits, 0, 32));
deUint32 result = 0;
for (int i = 0; i < numBits; i++)
result |= ((src >> i) & 1) << (numBits-1-i);
return result;
}
inline deUint32 bitReplicationScale (deUint32 src, int numSrcBits, int numDstBits)
{
DE_ASSERT(numSrcBits <= numDstBits);
DE_ASSERT((src & ((1<<numSrcBits)-1)) == src);
deUint32 dst = 0;
for (int shift = numDstBits-numSrcBits; shift > -numSrcBits; shift -= numSrcBits)
dst |= shift >= 0 ? src << shift : src >> -shift;
return dst;
}
inline deInt32 signExtend (deInt32 src, int numSrcBits)
{
DE_ASSERT(de::inRange(numSrcBits, 2, 31));
const bool negative = (src & (1 << (numSrcBits-1))) != 0;
return src | (negative ? ~((1 << numSrcBits) - 1) : 0);
}
inline bool isFloat16InfOrNan (deFloat16 v)
{
return getBits(v, 10, 14) == 31;
}
// A helper for getting bits from a 128-bit block.
class Block128
{
private:
typedef deUint64 Word;
enum
{
WORD_BYTES = sizeof(Word),
WORD_BITS = 8*WORD_BYTES,
NUM_WORDS = 128 / WORD_BITS
};
DE_STATIC_ASSERT(128 % WORD_BITS == 0);
public:
Block128 (const deUint8* src)
{
for (int wordNdx = 0; wordNdx < NUM_WORDS; wordNdx++)
{
m_words[wordNdx] = 0;
for (int byteNdx = 0; byteNdx < WORD_BYTES; byteNdx++)
m_words[wordNdx] |= (Word)src[wordNdx*WORD_BYTES + byteNdx] << (8*byteNdx);
}
}
deUint32 getBit (int ndx) const
{
DE_ASSERT(de::inBounds(ndx, 0, 128));
return (m_words[ndx / WORD_BITS] >> (ndx % WORD_BITS)) & 1;
}
deUint32 getBits (int low, int high) const
{
DE_ASSERT(de::inBounds(low, 0, 128));
DE_ASSERT(de::inBounds(high, 0, 128));
DE_ASSERT(de::inRange(high-low+1, 0, 32));
if (high-low+1 == 0)
return 0;
const int word0Ndx = low / WORD_BITS;
const int word1Ndx = high / WORD_BITS;
// \note "foo << bar << 1" done instead of "foo << (bar+1)" to avoid overflow, i.e. shift amount being too big.
if (word0Ndx == word1Ndx)
return (m_words[word0Ndx] & ((((Word)1 << high%WORD_BITS << 1) - 1))) >> ((Word)low % WORD_BITS);
else
{
DE_ASSERT(word1Ndx == word0Ndx + 1);
return (deUint32)(m_words[word0Ndx] >> (low%WORD_BITS)) |
(deUint32)((m_words[word1Ndx] & (((Word)1 << high%WORD_BITS << 1) - 1)) << (high-low - high%WORD_BITS));
}
}
bool isBitSet (int ndx) const
{
DE_ASSERT(de::inBounds(ndx, 0, 128));
return getBit(ndx) != 0;
}
private:
Word m_words[NUM_WORDS];
};
// A helper for sequential access into a Block128.
class BitAccessStream
{
public:
BitAccessStream (const Block128& src, int startNdxInSrc, int length, bool forward)
: m_src (src)
, m_startNdxInSrc (startNdxInSrc)
, m_length (length)
, m_forward (forward)
, m_ndx (0)
{
}
// Get the next num bits. Bits at positions greater than or equal to m_length are zeros.
deUint32 getNext (int num)
{
if (num == 0 || m_ndx >= m_length)
return 0;
const int end = m_ndx + num;
const int numBitsFromSrc = de::max(0, de::min(m_length, end) - m_ndx);
const int low = m_ndx;
const int high = m_ndx + numBitsFromSrc - 1;
m_ndx += num;
return m_forward ? m_src.getBits(m_startNdxInSrc + low, m_startNdxInSrc + high)
: reverseBits(m_src.getBits(m_startNdxInSrc - high, m_startNdxInSrc - low), numBitsFromSrc);
}
private:
const Block128& m_src;
const int m_startNdxInSrc;
const int m_length;
const bool m_forward;
int m_ndx;
};
enum ISEMode
{
ISEMODE_TRIT = 0,
ISEMODE_QUINT,
ISEMODE_PLAIN_BIT,
ISEMODE_LAST
};
struct ISEParams
{
ISEMode mode;
int numBits;
ISEParams (ISEMode mode_, int numBits_) : mode(mode_), numBits(numBits_) {}
};
inline int computeNumRequiredBits (const ISEParams& iseParams, int numValues)
{
switch (iseParams.mode)
{
case ISEMODE_TRIT: return divRoundUp(numValues*8, 5) + numValues*iseParams.numBits;
case ISEMODE_QUINT: return divRoundUp(numValues*7, 3) + numValues*iseParams.numBits;
case ISEMODE_PLAIN_BIT: return numValues*iseParams.numBits;
default:
DE_ASSERT(false);
return -1;
}
}
struct ISEDecodedResult
{
deUint32 m;
deUint32 tq; //!< Trit or quint value, depending on ISE mode.
deUint32 v;
};
// Data from an ASTC block's "block mode" part (i.e. bits [0,10]).
struct ASTCBlockMode
{
bool isError;
// \note Following fields only relevant if !isError.
bool isVoidExtent;
// \note Following fields only relevant if !isVoidExtent.
bool isDualPlane;
int weightGridWidth;
int weightGridHeight;
ISEParams weightISEParams;
ASTCBlockMode (void)
: isError (true)
, isVoidExtent (true)
, isDualPlane (true)
, weightGridWidth (-1)
, weightGridHeight (-1)
, weightISEParams (ISEMODE_LAST, -1)
{
}
};
inline int computeNumWeights (const ASTCBlockMode& mode)
{
return mode.weightGridWidth * mode.weightGridHeight * (mode.isDualPlane ? 2 : 1);
}
struct ColorEndpointPair
{
UVec4 e0;
UVec4 e1;
};
struct TexelWeightPair
{
deUint32 w[2];
};
ASTCBlockMode getASTCBlockMode (deUint32 blockModeData)
{
ASTCBlockMode blockMode;
blockMode.isError = true; // \note Set to false later, if not error.
blockMode.isVoidExtent = getBits(blockModeData, 0, 8) == 0x1fc;
if (!blockMode.isVoidExtent)
{
if ((getBits(blockModeData, 0, 1) == 0 && getBits(blockModeData, 6, 8) == 7) || getBits(blockModeData, 0, 3) == 0)
return blockMode; // Invalid ("reserved").
deUint32 r = (deUint32)-1; // \note Set in the following branches.
if (getBits(blockModeData, 0, 1) == 0)
{
const deUint32 r0 = getBit(blockModeData, 4);
const deUint32 r1 = getBit(blockModeData, 2);
const deUint32 r2 = getBit(blockModeData, 3);
const deUint32 i78 = getBits(blockModeData, 7, 8);
r = (r2 << 2) | (r1 << 1) | (r0 << 0);
if (i78 == 3)
{
const bool i5 = isBitSet(blockModeData, 5);
blockMode.weightGridWidth = i5 ? 10 : 6;
blockMode.weightGridHeight = i5 ? 6 : 10;
}
else
{
const deUint32 a = getBits(blockModeData, 5, 6);
switch (i78)
{
case 0: blockMode.weightGridWidth = 12; blockMode.weightGridHeight = a + 2; break;
case 1: blockMode.weightGridWidth = a + 2; blockMode.weightGridHeight = 12; break;
case 2: blockMode.weightGridWidth = a + 6; blockMode.weightGridHeight = getBits(blockModeData, 9, 10) + 6; break;
default: DE_ASSERT(false);
}
}
}
else
{
const deUint32 r0 = getBit(blockModeData, 4);
const deUint32 r1 = getBit(blockModeData, 0);
const deUint32 r2 = getBit(blockModeData, 1);
const deUint32 i23 = getBits(blockModeData, 2, 3);
const deUint32 a = getBits(blockModeData, 5, 6);
r = (r2 << 2) | (r1 << 1) | (r0 << 0);
if (i23 == 3)
{
const deUint32 b = getBit(blockModeData, 7);
const bool i8 = isBitSet(blockModeData, 8);
blockMode.weightGridWidth = i8 ? b+2 : a+2;
blockMode.weightGridHeight = i8 ? a+2 : b+6;
}
else
{
const deUint32 b = getBits(blockModeData, 7, 8);
switch (i23)
{
case 0: blockMode.weightGridWidth = b + 4; blockMode.weightGridHeight = a + 2; break;
case 1: blockMode.weightGridWidth = b + 8; blockMode.weightGridHeight = a + 2; break;
case 2: blockMode.weightGridWidth = a + 2; blockMode.weightGridHeight = b + 8; break;
default: DE_ASSERT(false);
}
}
}
const bool zeroDH = getBits(blockModeData, 0, 1) == 0 && getBits(blockModeData, 7, 8) == 2;
const bool h = zeroDH ? 0 : isBitSet(blockModeData, 9);
blockMode.isDualPlane = zeroDH ? 0 : isBitSet(blockModeData, 10);
{
ISEMode& m = blockMode.weightISEParams.mode;
int& b = blockMode.weightISEParams.numBits;
m = ISEMODE_PLAIN_BIT;
b = 0;
if (h)
{
switch (r)
{
case 2: m = ISEMODE_QUINT; b = 1; break;
case 3: m = ISEMODE_TRIT; b = 2; break;
case 4: b = 4; break;
case 5: m = ISEMODE_QUINT; b = 2; break;
case 6: m = ISEMODE_TRIT; b = 3; break;
case 7: b = 5; break;
default: DE_ASSERT(false);
}
}
else
{
switch (r)
{
case 2: b = 1; break;
case 3: m = ISEMODE_TRIT; break;
case 4: b = 2; break;
case 5: m = ISEMODE_QUINT; break;
case 6: m = ISEMODE_TRIT; b = 1; break;
case 7: b = 3; break;
default: DE_ASSERT(false);
}
}
}
}
blockMode.isError = false;
return blockMode;
}
inline void setASTCErrorColorBlock (void* dst, int blockWidth, int blockHeight, bool isSRGB)
{
if (isSRGB)
{
deUint8* const dstU = (deUint8*)dst;
for (int i = 0; i < blockWidth*blockHeight; i++)
{
dstU[4*i + 0] = 0xff;
dstU[4*i + 1] = 0;
dstU[4*i + 2] = 0xff;
dstU[4*i + 3] = 0xff;
}
}
else
{
float* const dstF = (float*)dst;
for (int i = 0; i < blockWidth*blockHeight; i++)
{
dstF[4*i + 0] = 1.0f;
dstF[4*i + 1] = 0.0f;
dstF[4*i + 2] = 1.0f;
dstF[4*i + 3] = 1.0f;
}
}
}
void decodeVoidExtentBlock (void* dst, const Block128& blockData, int blockWidth, int blockHeight, bool isSRGB, bool isLDRMode)
{
const deUint32 minSExtent = blockData.getBits(12, 24);
const deUint32 maxSExtent = blockData.getBits(25, 37);
const deUint32 minTExtent = blockData.getBits(38, 50);
const deUint32 maxTExtent = blockData.getBits(51, 63);
const bool allExtentsAllOnes = minSExtent == 0x1fff && maxSExtent == 0x1fff && minTExtent == 0x1fff && maxTExtent == 0x1fff;
const bool isHDRBlock = blockData.isBitSet(9);
if ((isLDRMode && isHDRBlock) || (!allExtentsAllOnes && (minSExtent >= maxSExtent || minTExtent >= maxTExtent)))
{
setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB);
return;
}
const deUint32 rgba[4] =
{
blockData.getBits(64, 79),
blockData.getBits(80, 95),
blockData.getBits(96, 111),
blockData.getBits(112, 127)
};
if (isSRGB)
{
deUint8* const dstU = (deUint8*)dst;
for (int i = 0; i < blockWidth*blockHeight; i++)
for (int c = 0; c < 4; c++)
dstU[i*4 + c] = (rgba[c] & 0xff00) >> 8;
}
else
{
float* const dstF = (float*)dst;
if (isHDRBlock)
{
for (int c = 0; c < 4; c++)
{
if (isFloat16InfOrNan(rgba[c]))
throw InternalError("Infinity or NaN color component in HDR void extent block in ASTC texture (behavior undefined by ASTC specification)");
}
for (int i = 0; i < blockWidth*blockHeight; i++)
for (int c = 0; c < 4; c++)
dstF[i*4 + c] = deFloat16To32((deFloat16)rgba[c]);
}
else
{
for (int i = 0; i < blockWidth*blockHeight; i++)
for (int c = 0; c < 4; c++)
dstF[i*4 + c] = rgba[c] == 65535 ? 1.0f : (float)rgba[c] / 65536.0f;
}
}
return;
}
void decodeColorEndpointModes (deUint32* endpointModesDst, const Block128& blockData, int numPartitions, int extraCemBitsStart)
{
if (numPartitions == 1)
endpointModesDst[0] = blockData.getBits(13, 16);
else
{
const deUint32 highLevelSelector = blockData.getBits(23, 24);
if (highLevelSelector == 0)
{
const deUint32 mode = blockData.getBits(25, 28);
for (int i = 0; i < numPartitions; i++)
endpointModesDst[i] = mode;
}
else
{
for (int partNdx = 0; partNdx < numPartitions; partNdx++)
{
const deUint32 cemClass = highLevelSelector - (blockData.isBitSet(25 + partNdx) ? 0 : 1);
const deUint32 lowBit0Ndx = numPartitions + 2*partNdx;
const deUint32 lowBit1Ndx = numPartitions + 2*partNdx + 1;
const deUint32 lowBit0 = blockData.getBit(lowBit0Ndx < 4 ? 25+lowBit0Ndx : extraCemBitsStart+lowBit0Ndx-4);
const deUint32 lowBit1 = blockData.getBit(lowBit1Ndx < 4 ? 25+lowBit1Ndx : extraCemBitsStart+lowBit1Ndx-4);
endpointModesDst[partNdx] = (cemClass << 2) | (lowBit1 << 1) | lowBit0;
}
}
}
}
inline int computeNumColorEndpointValues (deUint32 endpointMode)
{
DE_ASSERT(endpointMode < 16);
return (endpointMode/4 + 1) * 2;
}
int computeNumColorEndpointValues (const deUint32* endpointModes, int numPartitions)
{
int result = 0;
for (int i = 0; i < numPartitions; i++)
result += computeNumColorEndpointValues(endpointModes[i]);
return result;
}
void decodeISETritBlock (ISEDecodedResult* dst, int numValues, BitAccessStream& data, int numBits)
{
DE_ASSERT(de::inRange(numValues, 1, 5));
deUint32 m[5];
m[0] = data.getNext(numBits);
deUint32 T01 = data.getNext(2);
m[1] = data.getNext(numBits);
deUint32 T23 = data.getNext(2);
m[2] = data.getNext(numBits);
deUint32 T4 = data.getNext(1);
m[3] = data.getNext(numBits);
deUint32 T56 = data.getNext(2);
m[4] = data.getNext(numBits);
deUint32 T7 = data.getNext(1);
switch (numValues)
{
// \note Fall-throughs.
case 1: T23 = 0;
case 2: T4 = 0;
case 3: T56 = 0;
case 4: T7 = 0;
case 5: break;
default:
DE_ASSERT(false);
}
const deUint32 T = (T7 << 7) | (T56 << 5) | (T4 << 4) | (T23 << 2) | (T01 << 0);
static const deUint32 tritsFromT[256][5] =
{
{ 0,0,0,0,0 }, { 1,0,0,0,0 }, { 2,0,0,0,0 }, { 0,0,2,0,0 }, { 0,1,0,0,0 }, { 1,1,0,0,0 }, { 2,1,0,0,0 }, { 1,0,2,0,0 }, { 0,2,0,0,0 }, { 1,2,0,0,0 }, { 2,2,0,0,0 }, { 2,0,2,0,0 }, { 0,2,2,0,0 }, { 1,2,2,0,0 }, { 2,2,2,0,0 }, { 2,0,2,0,0 },
{ 0,0,1,0,0 }, { 1,0,1,0,0 }, { 2,0,1,0,0 }, { 0,1,2,0,0 }, { 0,1,1,0,0 }, { 1,1,1,0,0 }, { 2,1,1,0,0 }, { 1,1,2,0,0 }, { 0,2,1,0,0 }, { 1,2,1,0,0 }, { 2,2,1,0,0 }, { 2,1,2,0,0 }, { 0,0,0,2,2 }, { 1,0,0,2,2 }, { 2,0,0,2,2 }, { 0,0,2,2,2 },
{ 0,0,0,1,0 }, { 1,0,0,1,0 }, { 2,0,0,1,0 }, { 0,0,2,1,0 }, { 0,1,0,1,0 }, { 1,1,0,1,0 }, { 2,1,0,1,0 }, { 1,0,2,1,0 }, { 0,2,0,1,0 }, { 1,2,0,1,0 }, { 2,2,0,1,0 }, { 2,0,2,1,0 }, { 0,2,2,1,0 }, { 1,2,2,1,0 }, { 2,2,2,1,0 }, { 2,0,2,1,0 },
{ 0,0,1,1,0 }, { 1,0,1,1,0 }, { 2,0,1,1,0 }, { 0,1,2,1,0 }, { 0,1,1,1,0 }, { 1,1,1,1,0 }, { 2,1,1,1,0 }, { 1,1,2,1,0 }, { 0,2,1,1,0 }, { 1,2,1,1,0 }, { 2,2,1,1,0 }, { 2,1,2,1,0 }, { 0,1,0,2,2 }, { 1,1,0,2,2 }, { 2,1,0,2,2 }, { 1,0,2,2,2 },
{ 0,0,0,2,0 }, { 1,0,0,2,0 }, { 2,0,0,2,0 }, { 0,0,2,2,0 }, { 0,1,0,2,0 }, { 1,1,0,2,0 }, { 2,1,0,2,0 }, { 1,0,2,2,0 }, { 0,2,0,2,0 }, { 1,2,0,2,0 }, { 2,2,0,2,0 }, { 2,0,2,2,0 }, { 0,2,2,2,0 }, { 1,2,2,2,0 }, { 2,2,2,2,0 }, { 2,0,2,2,0 },
{ 0,0,1,2,0 }, { 1,0,1,2,0 }, { 2,0,1,2,0 }, { 0,1,2,2,0 }, { 0,1,1,2,0 }, { 1,1,1,2,0 }, { 2,1,1,2,0 }, { 1,1,2,2,0 }, { 0,2,1,2,0 }, { 1,2,1,2,0 }, { 2,2,1,2,0 }, { 2,1,2,2,0 }, { 0,2,0,2,2 }, { 1,2,0,2,2 }, { 2,2,0,2,2 }, { 2,0,2,2,2 },
{ 0,0,0,0,2 }, { 1,0,0,0,2 }, { 2,0,0,0,2 }, { 0,0,2,0,2 }, { 0,1,0,0,2 }, { 1,1,0,0,2 }, { 2,1,0,0,2 }, { 1,0,2,0,2 }, { 0,2,0,0,2 }, { 1,2,0,0,2 }, { 2,2,0,0,2 }, { 2,0,2,0,2 }, { 0,2,2,0,2 }, { 1,2,2,0,2 }, { 2,2,2,0,2 }, { 2,0,2,0,2 },
{ 0,0,1,0,2 }, { 1,0,1,0,2 }, { 2,0,1,0,2 }, { 0,1,2,0,2 }, { 0,1,1,0,2 }, { 1,1,1,0,2 }, { 2,1,1,0,2 }, { 1,1,2,0,2 }, { 0,2,1,0,2 }, { 1,2,1,0,2 }, { 2,2,1,0,2 }, { 2,1,2,0,2 }, { 0,2,2,2,2 }, { 1,2,2,2,2 }, { 2,2,2,2,2 }, { 2,0,2,2,2 },
{ 0,0,0,0,1 }, { 1,0,0,0,1 }, { 2,0,0,0,1 }, { 0,0,2,0,1 }, { 0,1,0,0,1 }, { 1,1,0,0,1 }, { 2,1,0,0,1 }, { 1,0,2,0,1 }, { 0,2,0,0,1 }, { 1,2,0,0,1 }, { 2,2,0,0,1 }, { 2,0,2,0,1 }, { 0,2,2,0,1 }, { 1,2,2,0,1 }, { 2,2,2,0,1 }, { 2,0,2,0,1 },
{ 0,0,1,0,1 }, { 1,0,1,0,1 }, { 2,0,1,0,1 }, { 0,1,2,0,1 }, { 0,1,1,0,1 }, { 1,1,1,0,1 }, { 2,1,1,0,1 }, { 1,1,2,0,1 }, { 0,2,1,0,1 }, { 1,2,1,0,1 }, { 2,2,1,0,1 }, { 2,1,2,0,1 }, { 0,0,1,2,2 }, { 1,0,1,2,2 }, { 2,0,1,2,2 }, { 0,1,2,2,2 },
{ 0,0,0,1,1 }, { 1,0,0,1,1 }, { 2,0,0,1,1 }, { 0,0,2,1,1 }, { 0,1,0,1,1 }, { 1,1,0,1,1 }, { 2,1,0,1,1 }, { 1,0,2,1,1 }, { 0,2,0,1,1 }, { 1,2,0,1,1 }, { 2,2,0,1,1 }, { 2,0,2,1,1 }, { 0,2,2,1,1 }, { 1,2,2,1,1 }, { 2,2,2,1,1 }, { 2,0,2,1,1 },
{ 0,0,1,1,1 }, { 1,0,1,1,1 }, { 2,0,1,1,1 }, { 0,1,2,1,1 }, { 0,1,1,1,1 }, { 1,1,1,1,1 }, { 2,1,1,1,1 }, { 1,1,2,1,1 }, { 0,2,1,1,1 }, { 1,2,1,1,1 }, { 2,2,1,1,1 }, { 2,1,2,1,1 }, { 0,1,1,2,2 }, { 1,1,1,2,2 }, { 2,1,1,2,2 }, { 1,1,2,2,2 },
{ 0,0,0,2,1 }, { 1,0,0,2,1 }, { 2,0,0,2,1 }, { 0,0,2,2,1 }, { 0,1,0,2,1 }, { 1,1,0,2,1 }, { 2,1,0,2,1 }, { 1,0,2,2,1 }, { 0,2,0,2,1 }, { 1,2,0,2,1 }, { 2,2,0,2,1 }, { 2,0,2,2,1 }, { 0,2,2,2,1 }, { 1,2,2,2,1 }, { 2,2,2,2,1 }, { 2,0,2,2,1 },
{ 0,0,1,2,1 }, { 1,0,1,2,1 }, { 2,0,1,2,1 }, { 0,1,2,2,1 }, { 0,1,1,2,1 }, { 1,1,1,2,1 }, { 2,1,1,2,1 }, { 1,1,2,2,1 }, { 0,2,1,2,1 }, { 1,2,1,2,1 }, { 2,2,1,2,1 }, { 2,1,2,2,1 }, { 0,2,1,2,2 }, { 1,2,1,2,2 }, { 2,2,1,2,2 }, { 2,1,2,2,2 },
{ 0,0,0,1,2 }, { 1,0,0,1,2 }, { 2,0,0,1,2 }, { 0,0,2,1,2 }, { 0,1,0,1,2 }, { 1,1,0,1,2 }, { 2,1,0,1,2 }, { 1,0,2,1,2 }, { 0,2,0,1,2 }, { 1,2,0,1,2 }, { 2,2,0,1,2 }, { 2,0,2,1,2 }, { 0,2,2,1,2 }, { 1,2,2,1,2 }, { 2,2,2,1,2 }, { 2,0,2,1,2 },
{ 0,0,1,1,2 }, { 1,0,1,1,2 }, { 2,0,1,1,2 }, { 0,1,2,1,2 }, { 0,1,1,1,2 }, { 1,1,1,1,2 }, { 2,1,1,1,2 }, { 1,1,2,1,2 }, { 0,2,1,1,2 }, { 1,2,1,1,2 }, { 2,2,1,1,2 }, { 2,1,2,1,2 }, { 0,2,2,2,2 }, { 1,2,2,2,2 }, { 2,2,2,2,2 }, { 2,1,2,2,2 }
};
const deUint32 (& trits)[5] = tritsFromT[T];
for (int i = 0; i < numValues; i++)
{
dst[i].m = m[i];
dst[i].tq = trits[i];
dst[i].v = (trits[i] << numBits) + m[i];
}
}
void decodeISEQuintBlock (ISEDecodedResult* dst, int numValues, BitAccessStream& data, int numBits)
{
DE_ASSERT(de::inRange(numValues, 1, 3));
deUint32 m[3];
m[0] = data.getNext(numBits);
deUint32 Q012 = data.getNext(3);
m[1] = data.getNext(numBits);
deUint32 Q34 = data.getNext(2);
m[2] = data.getNext(numBits);
deUint32 Q56 = data.getNext(2);
switch (numValues)
{
// \note Fall-throughs.
case 1: Q34 = 0;
case 2: Q56 = 0;
case 3: break;
default:
DE_ASSERT(false);
}
const deUint32 Q = (Q56 << 5) | (Q34 << 3) | (Q012 << 0);
static const deUint32 quintsFromQ[256][3] =
{
{ 0,0,0 }, { 1,0,0 }, { 2,0,0 }, { 3,0,0 }, { 4,0,0 }, { 0,4,0 }, { 4,4,0 }, { 4,4,4 }, { 0,1,0 }, { 1,1,0 }, { 2,1,0 }, { 3,1,0 }, { 4,1,0 }, { 1,4,0 }, { 4,4,1 }, { 4,4,4 },
{ 0,2,0 }, { 1,2,0 }, { 2,2,0 }, { 3,2,0 }, { 4,2,0 }, { 2,4,0 }, { 4,4,2 }, { 4,4,4 }, { 0,3,0 }, { 1,3,0 }, { 2,3,0 }, { 3,3,0 }, { 4,3,0 }, { 3,4,0 }, { 4,4,3 }, { 4,4,4 },
{ 0,0,1 }, { 1,0,1 }, { 2,0,1 }, { 3,0,1 }, { 4,0,1 }, { 0,4,1 }, { 4,0,4 }, { 0,4,4 }, { 0,1,1 }, { 1,1,1 }, { 2,1,1 }, { 3,1,1 }, { 4,1,1 }, { 1,4,1 }, { 4,1,4 }, { 1,4,4 },
{ 0,2,1 }, { 1,2,1 }, { 2,2,1 }, { 3,2,1 }, { 4,2,1 }, { 2,4,1 }, { 4,2,4 }, { 2,4,4 }, { 0,3,1 }, { 1,3,1 }, { 2,3,1 }, { 3,3,1 }, { 4,3,1 }, { 3,4,1 }, { 4,3,4 }, { 3,4,4 },
{ 0,0,2 }, { 1,0,2 }, { 2,0,2 }, { 3,0,2 }, { 4,0,2 }, { 0,4,2 }, { 2,0,4 }, { 3,0,4 }, { 0,1,2 }, { 1,1,2 }, { 2,1,2 }, { 3,1,2 }, { 4,1,2 }, { 1,4,2 }, { 2,1,4 }, { 3,1,4 },
{ 0,2,2 }, { 1,2,2 }, { 2,2,2 }, { 3,2,2 }, { 4,2,2 }, { 2,4,2 }, { 2,2,4 }, { 3,2,4 }, { 0,3,2 }, { 1,3,2 }, { 2,3,2 }, { 3,3,2 }, { 4,3,2 }, { 3,4,2 }, { 2,3,4 }, { 3,3,4 },
{ 0,0,3 }, { 1,0,3 }, { 2,0,3 }, { 3,0,3 }, { 4,0,3 }, { 0,4,3 }, { 0,0,4 }, { 1,0,4 }, { 0,1,3 }, { 1,1,3 }, { 2,1,3 }, { 3,1,3 }, { 4,1,3 }, { 1,4,3 }, { 0,1,4 }, { 1,1,4 },
{ 0,2,3 }, { 1,2,3 }, { 2,2,3 }, { 3,2,3 }, { 4,2,3 }, { 2,4,3 }, { 0,2,4 }, { 1,2,4 }, { 0,3,3 }, { 1,3,3 }, { 2,3,3 }, { 3,3,3 }, { 4,3,3 }, { 3,4,3 }, { 0,3,4 }, { 1,3,4 }
};
const deUint32 (& quints)[3] = quintsFromQ[Q];
for (int i = 0; i < numValues; i++)
{
dst[i].m = m[i];
dst[i].tq = quints[i];
dst[i].v = (quints[i] << numBits) + m[i];
}
}
inline void decodeISEBitBlock (ISEDecodedResult* dst, BitAccessStream& data, int numBits)
{
dst[0].m = data.getNext(numBits);
dst[0].v = dst[0].m;
}
void decodeISE (ISEDecodedResult* dst, int numValues, BitAccessStream& data, const ISEParams& params)
{
if (params.mode == ISEMODE_TRIT)
{
const int numBlocks = divRoundUp(numValues, 5);
for (int blockNdx = 0; blockNdx < numBlocks; blockNdx++)
{
const int numValuesInBlock = blockNdx == numBlocks-1 ? numValues - 5*(numBlocks-1) : 5;
decodeISETritBlock(&dst[5*blockNdx], numValuesInBlock, data, params.numBits);
}
}
else if (params.mode == ISEMODE_QUINT)
{
const int numBlocks = divRoundUp(numValues, 3);
for (int blockNdx = 0; blockNdx < numBlocks; blockNdx++)
{
const int numValuesInBlock = blockNdx == numBlocks-1 ? numValues - 3*(numBlocks-1) : 3;
decodeISEQuintBlock(&dst[3*blockNdx], numValuesInBlock, data, params.numBits);
}
}
else
{
DE_ASSERT(params.mode == ISEMODE_PLAIN_BIT);
for (int i = 0; i < numValues; i++)
decodeISEBitBlock(&dst[i], data, params.numBits);
}
}
ISEParams computeMaximumRangeISEParams (int numAvailableBits, int numValuesInSequence)
{
int curBitsForTritMode = 6;
int curBitsForQuintMode = 5;
int curBitsForPlainBitMode = 8;
while (true)
{
DE_ASSERT(curBitsForTritMode > 0 || curBitsForQuintMode > 0 || curBitsForPlainBitMode > 0);
const int tritRange = curBitsForTritMode > 0 ? (3 << curBitsForTritMode) - 1 : -1;
const int quintRange = curBitsForQuintMode > 0 ? (5 << curBitsForQuintMode) - 1 : -1;
const int plainBitRange = curBitsForPlainBitMode > 0 ? (1 << curBitsForPlainBitMode) - 1 : -1;
const int maxRange = de::max(de::max(tritRange, quintRange), plainBitRange);
if (maxRange == tritRange)
{
const ISEParams params(ISEMODE_TRIT, curBitsForTritMode);
if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits)
return ISEParams(ISEMODE_TRIT, curBitsForTritMode);
curBitsForTritMode--;
}
else if (maxRange == quintRange)
{
const ISEParams params(ISEMODE_QUINT, curBitsForQuintMode);
if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits)
return ISEParams(ISEMODE_QUINT, curBitsForQuintMode);
curBitsForQuintMode--;
}
else
{
const ISEParams params(ISEMODE_PLAIN_BIT, curBitsForPlainBitMode);
DE_ASSERT(maxRange == plainBitRange);
if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits)
return ISEParams(ISEMODE_PLAIN_BIT, curBitsForPlainBitMode);
curBitsForPlainBitMode--;
}
}
}
void unquantizeColorEndpoints (deUint32* dst, const ISEDecodedResult* iseResults, int numEndpoints, const ISEParams& iseParams)
{
if (iseParams.mode == ISEMODE_TRIT || iseParams.mode == ISEMODE_QUINT)
{
const int rangeCase = iseParams.numBits*2 - (iseParams.mode == ISEMODE_TRIT ? 2 : 1);
DE_ASSERT(de::inRange(rangeCase, 0, 10));
static const deUint32 Ca[11] = { 204, 113, 93, 54, 44, 26, 22, 13, 11, 6, 5 };
const deUint32 C = Ca[rangeCase];
for (int endpointNdx = 0; endpointNdx < numEndpoints; endpointNdx++)
{
const deUint32 a = getBit(iseResults[endpointNdx].m, 0);
const deUint32 b = getBit(iseResults[endpointNdx].m, 1);
const deUint32 c = getBit(iseResults[endpointNdx].m, 2);
const deUint32 d = getBit(iseResults[endpointNdx].m, 3);
const deUint32 e = getBit(iseResults[endpointNdx].m, 4);
const deUint32 f = getBit(iseResults[endpointNdx].m, 5);
const deUint32 A = a == 0 ? 0 : (1<<9)-1;
const deUint32 B = rangeCase == 0 ? 0
: rangeCase == 1 ? 0
: rangeCase == 2 ? (b << 8) | (b << 4) | (b << 2) | (b << 1)
: rangeCase == 3 ? (b << 8) | (b << 3) | (b << 2)
: rangeCase == 4 ? (c << 8) | (b << 7) | (c << 3) | (b << 2) | (c << 1) | (b << 0)
: rangeCase == 5 ? (c << 8) | (b << 7) | (c << 2) | (b << 1) | (c << 0)
: rangeCase == 6 ? (d << 8) | (c << 7) | (b << 6) | (d << 2) | (c << 1) | (b << 0)
: rangeCase == 7 ? (d << 8) | (c << 7) | (b << 6) | (d << 1) | (c << 0)
: rangeCase == 8 ? (e << 8) | (d << 7) | (c << 6) | (b << 5) | (e << 1) | (d << 0)
: rangeCase == 9 ? (e << 8) | (d << 7) | (c << 6) | (b << 5) | (e << 0)
: rangeCase == 10 ? (f << 8) | (e << 7) | (d << 6) | (c << 5) | (b << 4) | (f << 0)
: (deUint32)-1;
DE_ASSERT(B != (deUint32)-1);
dst[endpointNdx] = (((iseResults[endpointNdx].tq*C + B) ^ A) >> 2) | (A & 0x80);
}
}
else
{
DE_ASSERT(iseParams.mode == ISEMODE_PLAIN_BIT);
for (int endpointNdx = 0; endpointNdx < numEndpoints; endpointNdx++)
dst[endpointNdx] = bitReplicationScale(iseResults[endpointNdx].v, iseParams.numBits, 8);
}
}
inline void bitTransferSigned (deInt32& a, deInt32& b)
{
b >>= 1;
b |= a & 0x80;
a >>= 1;
a &= 0x3f;
if (isBitSet(a, 5))
a -= 0x40;
}
inline UVec4 clampedRGBA (const IVec4& rgba)
{
return UVec4(de::clamp(rgba.x(), 0, 0xff),
de::clamp(rgba.y(), 0, 0xff),
de::clamp(rgba.z(), 0, 0xff),
de::clamp(rgba.w(), 0, 0xff));
}
inline IVec4 blueContract (int r, int g, int b, int a)
{
return IVec4((r+b)>>1, (g+b)>>1, b, a);
}
inline bool isColorEndpointModeHDR (deUint32 mode)
{
return mode == 2 ||
mode == 3 ||
mode == 7 ||
mode == 11 ||
mode == 14 ||
mode == 15;
}
void decodeHDREndpointMode7 (UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3)
{
const deUint32 m10 = getBit(v1, 7) | (getBit(v2, 7) << 1);
const deUint32 m23 = getBits(v0, 6, 7);
const deUint32 majComp = m10 != 3 ? m10
: m23 != 3 ? m23
: 0;
const deUint32 mode = m10 != 3 ? m23
: m23 != 3 ? 4
: 5;
deInt32 red = (deInt32)getBits(v0, 0, 5);
deInt32 green = (deInt32)getBits(v1, 0, 4);
deInt32 blue = (deInt32)getBits(v2, 0, 4);
deInt32 scale = (deInt32)getBits(v3, 0, 4);
{
#define SHOR(DST_VAR, SHIFT, BIT_VAR) (DST_VAR) |= (BIT_VAR) << (SHIFT)
#define ASSIGN_X_BITS(V0,S0, V1,S1, V2,S2, V3,S3, V4,S4, V5,S5, V6,S6) do { SHOR(V0,S0,x0); SHOR(V1,S1,x1); SHOR(V2,S2,x2); SHOR(V3,S3,x3); SHOR(V4,S4,x4); SHOR(V5,S5,x5); SHOR(V6,S6,x6); } while (false)
const deUint32 x0 = getBit(v1, 6);
const deUint32 x1 = getBit(v1, 5);
const deUint32 x2 = getBit(v2, 6);
const deUint32 x3 = getBit(v2, 5);
const deUint32 x4 = getBit(v3, 7);
const deUint32 x5 = getBit(v3, 6);
const deUint32 x6 = getBit(v3, 5);
deInt32& R = red;
deInt32& G = green;
deInt32& B = blue;
deInt32& S = scale;
switch (mode)
{
case 0: ASSIGN_X_BITS(R,9, R,8, R,7, R,10, R,6, S,6, S,5); break;
case 1: ASSIGN_X_BITS(R,8, G,5, R,7, B,5, R,6, R,10, R,9); break;
case 2: ASSIGN_X_BITS(R,9, R,8, R,7, R,6, S,7, S,6, S,5); break;
case 3: ASSIGN_X_BITS(R,8, G,5, R,7, B,5, R,6, S,6, S,5); break;
case 4: ASSIGN_X_BITS(G,6, G,5, B,6, B,5, R,6, R,7, S,5); break;
case 5: ASSIGN_X_BITS(G,6, G,5, B,6, B,5, R,6, S,6, S,5); break;
default:
DE_ASSERT(false);
}
#undef ASSIGN_X_BITS
#undef SHOR
}
static const int shiftAmounts[] = { 1, 1, 2, 3, 4, 5 };
DE_ASSERT(mode < DE_LENGTH_OF_ARRAY(shiftAmounts));
red <<= shiftAmounts[mode];
green <<= shiftAmounts[mode];
blue <<= shiftAmounts[mode];
scale <<= shiftAmounts[mode];
if (mode != 5)
{
green = red - green;
blue = red - blue;
}
if (majComp == 1)
std::swap(red, green);
else if (majComp == 2)
std::swap(red, blue);
e0 = UVec4(de::clamp(red - scale, 0, 0xfff),
de::clamp(green - scale, 0, 0xfff),
de::clamp(blue - scale, 0, 0xfff),
0x780);
e1 = UVec4(de::clamp(red, 0, 0xfff),
de::clamp(green, 0, 0xfff),
de::clamp(blue, 0, 0xfff),
0x780);
}
void decodeHDREndpointMode11 (UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3, deUint32 v4, deUint32 v5)
{
const deUint32 major = (getBit(v5, 7) << 1) | getBit(v4, 7);
if (major == 3)
{
e0 = UVec4(v0<<4, v2<<4, getBits(v4,0,6)<<5, 0x780);
e1 = UVec4(v1<<4, v3<<4, getBits(v5,0,6)<<5, 0x780);
}
else
{
const deUint32 mode = (getBit(v3, 7) << 2) | (getBit(v2, 7) << 1) | getBit(v1, 7);
deInt32 a = (deInt32)((getBit(v1, 6) << 8) | v0);
deInt32 c = (deInt32)(getBits(v1, 0, 5));
deInt32 b0 = (deInt32)(getBits(v2, 0, 5));
deInt32 b1 = (deInt32)(getBits(v3, 0, 5));
deInt32 d0 = (deInt32)(getBits(v4, 0, 4));
deInt32 d1 = (deInt32)(getBits(v5, 0, 4));
{
#define SHOR(DST_VAR, SHIFT, BIT_VAR) (DST_VAR) |= (BIT_VAR) << (SHIFT)
#define ASSIGN_X_BITS(V0,S0, V1,S1, V2,S2, V3,S3, V4,S4, V5,S5) do { SHOR(V0,S0,x0); SHOR(V1,S1,x1); SHOR(V2,S2,x2); SHOR(V3,S3,x3); SHOR(V4,S4,x4); SHOR(V5,S5,x5); } while (false)
const deUint32 x0 = getBit(v2, 6);
const deUint32 x1 = getBit(v3, 6);
const deUint32 x2 = getBit(v4, 6);
const deUint32 x3 = getBit(v5, 6);
const deUint32 x4 = getBit(v4, 5);
const deUint32 x5 = getBit(v5, 5);
switch (mode)
{
case 0: ASSIGN_X_BITS(b0,6, b1,6, d0,6, d1,6, d0,5, d1,5); break;
case 1: ASSIGN_X_BITS(b0,6, b1,6, b0,7, b1,7, d0,5, d1,5); break;
case 2: ASSIGN_X_BITS(a,9, c,6, d0,6, d1,6, d0,5, d1,5); break;
case 3: ASSIGN_X_BITS(b0,6, b1,6, a,9, c,6, d0,5, d1,5); break;
case 4: ASSIGN_X_BITS(b0,6, b1,6, b0,7, b1,7, a,9, a,10); break;
case 5: ASSIGN_X_BITS(a,9, a,10, c,7, c,6, d0,5, d1,5); break;
case 6: ASSIGN_X_BITS(b0,6, b1,6, a,11, c,6, a,9, a,10); break;
case 7: ASSIGN_X_BITS(a,9, a,10, a,11, c,6, d0,5, d1,5); break;
default:
DE_ASSERT(false);
}
#undef ASSIGN_X_BITS
#undef SHOR
}
static const int numDBits[] = { 7, 6, 7, 6, 5, 6, 5, 6 };
DE_ASSERT(mode < DE_LENGTH_OF_ARRAY(numDBits));
d0 = signExtend(d0, numDBits[mode]);
d1 = signExtend(d1, numDBits[mode]);
const int shiftAmount = (mode >> 1) ^ 3;
a <<= shiftAmount;
c <<= shiftAmount;
b0 <<= shiftAmount;
b1 <<= shiftAmount;
d0 <<= shiftAmount;
d1 <<= shiftAmount;
e0 = UVec4(de::clamp(a-c, 0, 0xfff),
de::clamp(a-b0-c-d0, 0, 0xfff),
de::clamp(a-b1-c-d1, 0, 0xfff),
0x780);
e1 = UVec4(de::clamp(a, 0, 0xfff),
de::clamp(a-b0, 0, 0xfff),
de::clamp(a-b1, 0, 0xfff),
0x780);
if (major == 1)
{
std::swap(e0.x(), e0.y());
std::swap(e1.x(), e1.y());
}
else if (major == 2)
{
std::swap(e0.x(), e0.z());
std::swap(e1.x(), e1.z());
}
}
}
void decodeHDREndpointMode15(UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3, deUint32 v4, deUint32 v5, deUint32 v6In, deUint32 v7In)
{
decodeHDREndpointMode11(e0, e1, v0, v1, v2, v3, v4, v5);
const deUint32 mode = (getBit(v7In, 7) << 1) | getBit(v6In, 7);
deInt32 v6 = (deInt32)getBits(v6In, 0, 6);
deInt32 v7 = (deInt32)getBits(v7In, 0, 6);
if (mode == 3)
{
e0.w() = v6 << 5;
e1.w() = v7 << 5;
}
else
{
v6 |= (v7 << (mode+1)) & 0x780;
v7 &= (0x3f >> mode);
v7 ^= 0x20 >> mode;
v7 -= 0x20 >> mode;
v6 <<= 4-mode;
v7 <<= 4-mode;
v7 += v6;
v7 = de::clamp(v7, 0, 0xfff);
e0.w() = v6;
e1.w() = v7;
}
}
void decodeColorEndpoints (ColorEndpointPair* dst, const deUint32* unquantizedEndpoints, const deUint32* endpointModes, int numPartitions)
{
int unquantizedNdx = 0;
for (int partitionNdx = 0; partitionNdx < numPartitions; partitionNdx++)
{
const deUint32 endpointMode = endpointModes[partitionNdx];
const deUint32* v = &unquantizedEndpoints[unquantizedNdx];
UVec4& e0 = dst[partitionNdx].e0;
UVec4& e1 = dst[partitionNdx].e1;
unquantizedNdx += computeNumColorEndpointValues(endpointMode);
switch (endpointMode)
{
case 0:
e0 = UVec4(v[0], v[0], v[0], 0xff);
e1 = UVec4(v[1], v[1], v[1], 0xff);
break;
case 1:
{
const deUint32 L0 = (v[0] >> 2) | (getBits(v[1], 6, 7) << 6);
const deUint32 L1 = de::min(0xffu, L0 + getBits(v[1], 0, 5));
e0 = UVec4(L0, L0, L0, 0xff);
e1 = UVec4(L1, L1, L1, 0xff);
break;
}
case 2:
{
const deUint32 v1Gr = v[1] >= v[0];
const deUint32 y0 = v1Gr ? v[0]<<4 : (v[1]<<4) + 8;
const deUint32 y1 = v1Gr ? v[1]<<4 : (v[0]<<4) - 8;
e0 = UVec4(y0, y0, y0, 0x780);
e1 = UVec4(y1, y1, y1, 0x780);
break;
}
case 3:
{
const bool m = isBitSet(v[0], 7);
const deUint32 y0 = m ? (getBits(v[1], 5, 7) << 9) | (getBits(v[0], 0, 6) << 2)
: (getBits(v[1], 4, 7) << 8) | (getBits(v[0], 0, 6) << 1);
const deUint32 d = m ? getBits(v[1], 0, 4) << 2
: getBits(v[1], 0, 3) << 1;
const deUint32 y1 = de::min(0xfffu, y0+d);
e0 = UVec4(y0, y0, y0, 0x780);
e1 = UVec4(y1, y1, y1, 0x780);
break;
}
case 4:
e0 = UVec4(v[0], v[0], v[0], v[2]);
e1 = UVec4(v[1], v[1], v[1], v[3]);
break;
case 5:
{
deInt32 v0 = (deInt32)v[0];
deInt32 v1 = (deInt32)v[1];
deInt32 v2 = (deInt32)v[2];
deInt32 v3 = (deInt32)v[3];
bitTransferSigned(v1, v0);
bitTransferSigned(v3, v2);
e0 = clampedRGBA(IVec4(v0, v0, v0, v2));
e1 = clampedRGBA(IVec4(v0+v1, v0+v1, v0+v1, v2+v3));
break;
}
case 6:
e0 = UVec4((v[0]*v[3]) >> 8, (v[1]*v[3]) >> 8, (v[2]*v[3]) >> 8, 0xff);
e1 = UVec4(v[0], v[1], v[2], 0xff);
break;
case 7:
decodeHDREndpointMode7(e0, e1, v[0], v[1], v[2], v[3]);
break;
case 8:
if (v[1]+v[3]+v[5] >= v[0]+v[2]+v[4])
{
e0 = UVec4(v[0], v[2], v[4], 0xff);
e1 = UVec4(v[1], v[3], v[5], 0xff);
}
else
{
e0 = blueContract(v[1], v[3], v[5], 0xff).asUint();
e1 = blueContract(v[0], v[2], v[4], 0xff).asUint();
}
break;
case 9:
{
deInt32 v0 = (deInt32)v[0];
deInt32 v1 = (deInt32)v[1];
deInt32 v2 = (deInt32)v[2];
deInt32 v3 = (deInt32)v[3];
deInt32 v4 = (deInt32)v[4];
deInt32 v5 = (deInt32)v[5];
bitTransferSigned(v1, v0);
bitTransferSigned(v3, v2);
bitTransferSigned(v5, v4);
if (v1+v3+v5 >= 0)
{
e0 = clampedRGBA(IVec4(v0, v2, v4, 0xff));
e1 = clampedRGBA(IVec4(v0+v1, v2+v3, v4+v5, 0xff));
}
else
{
e0 = clampedRGBA(blueContract(v0+v1, v2+v3, v4+v5, 0xff));
e1 = clampedRGBA(blueContract(v0, v2, v4, 0xff));
}
break;
}
case 10:
e0 = UVec4((v[0]*v[3]) >> 8, (v[1]*v[3]) >> 8, (v[2]*v[3]) >> 8, v[4]);
e1 = UVec4(v[0], v[1], v[2], v[5]);
break;
case 11:
decodeHDREndpointMode11(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5]);
break;
case 12:
if (v[1]+v[3]+v[5] >= v[0]+v[2]+v[4])
{
e0 = UVec4(v[0], v[2], v[4], v[6]);
e1 = UVec4(v[1], v[3], v[5], v[7]);
}
else
{
e0 = clampedRGBA(blueContract(v[1], v[3], v[5], v[7]));
e1 = clampedRGBA(blueContract(v[0], v[2], v[4], v[6]));
}
break;
case 13:
{
deInt32 v0 = (deInt32)v[0];
deInt32 v1 = (deInt32)v[1];
deInt32 v2 = (deInt32)v[2];
deInt32 v3 = (deInt32)v[3];
deInt32 v4 = (deInt32)v[4];
deInt32 v5 = (deInt32)v[5];
deInt32 v6 = (deInt32)v[6];
deInt32 v7 = (deInt32)v[7];
bitTransferSigned(v1, v0);
bitTransferSigned(v3, v2);
bitTransferSigned(v5, v4);
bitTransferSigned(v7, v6);
if (v1+v3+v5 >= 0)
{
e0 = clampedRGBA(IVec4(v0, v2, v4, v6));
e1 = clampedRGBA(IVec4(v0+v1, v2+v3, v4+v5, v6+v7));
}
else
{
e0 = clampedRGBA(blueContract(v0+v1, v2+v3, v4+v5, v6+v7));
e1 = clampedRGBA(blueContract(v0, v2, v4, v6));
}
break;
}
case 14:
decodeHDREndpointMode11(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5]);
e0.w() = v[6];
e1.w() = v[7];
break;
case 15:
decodeHDREndpointMode15(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]);
break;
default:
DE_ASSERT(false);
}
}
}
void computeColorEndpoints (ColorEndpointPair* dst, const Block128& blockData, const deUint32* endpointModes, int numPartitions, int numColorEndpointValues, const ISEParams& iseParams, int numBitsAvailable)
{
const int colorEndpointDataStart = numPartitions == 1 ? 17 : 29;
ISEDecodedResult colorEndpointData[18];
{
BitAccessStream dataStream(blockData, colorEndpointDataStart, numBitsAvailable, true);
decodeISE(&colorEndpointData[0], numColorEndpointValues, dataStream, iseParams);
}
{
deUint32 unquantizedEndpoints[18];
unquantizeColorEndpoints(&unquantizedEndpoints[0], &colorEndpointData[0], numColorEndpointValues, iseParams);
decodeColorEndpoints(dst, &unquantizedEndpoints[0], &endpointModes[0], numPartitions);
}
}
void unquantizeWeights (deUint32* dst, const ISEDecodedResult* weightGrid, const ASTCBlockMode& blockMode)
{
const int numWeights = computeNumWeights(blockMode);
const ISEParams& iseParams = blockMode.weightISEParams;
if (iseParams.mode == ISEMODE_TRIT || iseParams.mode == ISEMODE_QUINT)
{
const int rangeCase = iseParams.numBits*2 + (iseParams.mode == ISEMODE_QUINT ? 1 : 0);
if (rangeCase == 0 || rangeCase == 1)
{
static const deUint32 map0[3] = { 0, 32, 63 };
static const deUint32 map1[5] = { 0, 16, 32, 47, 63 };
const deUint32* const map = rangeCase == 0 ? &map0[0] : &map1[0];
for (int i = 0; i < numWeights; i++)
{
DE_ASSERT(weightGrid[i].v < (rangeCase == 0 ? 3u : 5u));
dst[i] = map[weightGrid[i].v];
}
}
else
{
DE_ASSERT(rangeCase <= 6);
static const deUint32 Ca[5] = { 50, 28, 23, 13, 11 };
const deUint32 C = Ca[rangeCase-2];
for (int weightNdx = 0; weightNdx < numWeights; weightNdx++)
{
const deUint32 a = getBit(weightGrid[weightNdx].m, 0);
const deUint32 b = getBit(weightGrid[weightNdx].m, 1);
const deUint32 c = getBit(weightGrid[weightNdx].m, 2);
const deUint32 A = a == 0 ? 0 : (1<<7)-1;
const deUint32 B = rangeCase == 2 ? 0
: rangeCase == 3 ? 0
: rangeCase == 4 ? (b << 6) | (b << 2) | (b << 0)
: rangeCase == 5 ? (b << 6) | (b << 1)
: rangeCase == 6 ? (c << 6) | (b << 5) | (c << 1) | (b << 0)
: (deUint32)-1;
dst[weightNdx] = (((weightGrid[weightNdx].tq*C + B) ^ A) >> 2) | (A & 0x20);
}
}
}
else
{
DE_ASSERT(iseParams.mode == ISEMODE_PLAIN_BIT);
for (int weightNdx = 0; weightNdx < numWeights; weightNdx++)
dst[weightNdx] = bitReplicationScale(weightGrid[weightNdx].v, iseParams.numBits, 6);
}
for (int weightNdx = 0; weightNdx < numWeights; weightNdx++)
dst[weightNdx] += dst[weightNdx] > 32 ? 1 : 0;
}
void interpolateWeights (TexelWeightPair* dst, const deUint32* unquantizedWeights, int blockWidth, int blockHeight, const ASTCBlockMode& blockMode)
{
const int numWeightsPerTexel = blockMode.isDualPlane ? 2 : 1;
const deUint32 scaleX = (1024 + blockWidth/2) / (blockWidth-1);
const deUint32 scaleY = (1024 + blockHeight/2) / (blockHeight-1);
for (int texelY = 0; texelY < blockHeight; texelY++)
{
for (int texelX = 0; texelX < blockWidth; texelX++)
{
const deUint32 gX = (scaleX*texelX*(blockMode.weightGridWidth-1) + 32) >> 6;
const deUint32 gY = (scaleY*texelY*(blockMode.weightGridHeight-1) + 32) >> 6;
const deUint32 jX = gX >> 4;
const deUint32 jY = gY >> 4;
const deUint32 fX = gX & 0xf;
const deUint32 fY = gY & 0xf;
const deUint32 w11 = (fX*fY + 8) >> 4;
const deUint32 w10 = fY - w11;
const deUint32 w01 = fX - w11;
const deUint32 w00 = 16 - fX - fY + w11;
const deUint32 v0 = jY*blockMode.weightGridWidth + jX;
for (int texelWeightNdx = 0; texelWeightNdx < numWeightsPerTexel; texelWeightNdx++)
{
const deUint32 p00 = unquantizedWeights[(v0) * numWeightsPerTexel + texelWeightNdx];
const deUint32 p01 = unquantizedWeights[(v0 + 1) * numWeightsPerTexel + texelWeightNdx];
const deUint32 p10 = unquantizedWeights[(v0 + blockMode.weightGridWidth) * numWeightsPerTexel + texelWeightNdx];
const deUint32 p11 = unquantizedWeights[(v0 + blockMode.weightGridWidth + 1) * numWeightsPerTexel + texelWeightNdx];
dst[texelY*blockWidth + texelX].w[texelWeightNdx] = (p00*w00 + p01*w01 + p10*w10 + p11*w11 + 8) >> 4;
}
}
}
}
void computeTexelWeights (TexelWeightPair* dst, const Block128& blockData, int blockWidth, int blockHeight, const ASTCBlockMode& blockMode)
{
ISEDecodedResult weightGrid[64];
{
BitAccessStream dataStream(blockData, 127, computeNumRequiredBits(blockMode.weightISEParams, computeNumWeights(blockMode)), false);
decodeISE(&weightGrid[0], computeNumWeights(blockMode), dataStream, blockMode.weightISEParams);
}
{
deUint32 unquantizedWeights[64];
unquantizeWeights(&unquantizedWeights[0], &weightGrid[0], blockMode);
interpolateWeights(dst, &unquantizedWeights[0], blockWidth, blockHeight, blockMode);
}
}
inline deUint32 hash52 (deUint32 v)
{
deUint32 p = v;
p ^= p >> 15; p -= p << 17; p += p << 7; p += p << 4;
p ^= p >> 5; p += p << 16; p ^= p >> 7; p ^= p >> 3;
p ^= p << 6; p ^= p >> 17;
return p;
}
int computeTexelPartition (deUint32 seedIn, deUint32 xIn, deUint32 yIn, deUint32 zIn, int numPartitions, bool smallBlock)
{
DE_ASSERT(zIn == 0);
const deUint32 x = smallBlock ? xIn << 1 : xIn;
const deUint32 y = smallBlock ? yIn << 1 : yIn;
const deUint32 z = smallBlock ? zIn << 1 : zIn;
const deUint32 seed = seedIn + 1024*(numPartitions-1);
const deUint32 rnum = hash52(seed);
deUint8 seed1 = rnum & 0xf;
deUint8 seed2 = (rnum >> 4) & 0xf;
deUint8 seed3 = (rnum >> 8) & 0xf;
deUint8 seed4 = (rnum >> 12) & 0xf;
deUint8 seed5 = (rnum >> 16) & 0xf;
deUint8 seed6 = (rnum >> 20) & 0xf;
deUint8 seed7 = (rnum >> 24) & 0xf;
deUint8 seed8 = (rnum >> 28) & 0xf;
deUint8 seed9 = (rnum >> 18) & 0xf;
deUint8 seed10 = (rnum >> 22) & 0xf;
deUint8 seed11 = (rnum >> 26) & 0xf;
deUint8 seed12 = ((rnum >> 30) | (rnum << 2)) & 0xf;
seed1 *= seed1; seed5 *= seed5; seed9 *= seed9;
seed2 *= seed2; seed6 *= seed6; seed10 *= seed10;
seed3 *= seed3; seed7 *= seed7; seed11 *= seed11;
seed4 *= seed4; seed8 *= seed8; seed12 *= seed12;
const int shA = (seed & 2) != 0 ? 4 : 5;
const int shB = numPartitions == 3 ? 6 : 5;
const int sh1 = (seed & 1) != 0 ? shA : shB;
const int sh2 = (seed & 1) != 0 ? shB : shA;
const int sh3 = (seed & 0x10) != 0 ? sh1 : sh2;
seed1 >>= sh1; seed2 >>= sh2; seed3 >>= sh1; seed4 >>= sh2;
seed5 >>= sh1; seed6 >>= sh2; seed7 >>= sh1; seed8 >>= sh2;
seed9 >>= sh3; seed10 >>= sh3; seed11 >>= sh3; seed12 >>= sh3;
const int a = 0x3f & (seed1*x + seed2*y + seed11*z + (rnum >> 14));
const int b = 0x3f & (seed3*x + seed4*y + seed12*z + (rnum >> 10));
const int c = numPartitions >= 3 ? 0x3f & (seed5*x + seed6*y + seed9*z + (rnum >> 6)) : 0;
const int d = numPartitions >= 4 ? 0x3f & (seed7*x + seed8*y + seed10*z + (rnum >> 2)) : 0;
return a >= b && a >= c && a >= d ? 0
: b >= c && b >= d ? 1
: c >= d ? 2
: 3;
}
void setTexelColors (void* dst, ColorEndpointPair* colorEndpoints, TexelWeightPair* texelWeights, int ccs, deUint32 partitionIndexSeed,
int numPartitions, int blockWidth, int blockHeight, bool isSRGB, bool isLDRMode, const deUint32* colorEndpointModes)
{
const bool smallBlock = blockWidth*blockHeight < 31;
bool isHDREndpoint[4];
for (int i = 0; i < numPartitions; i++)
isHDREndpoint[i] = isColorEndpointModeHDR(colorEndpointModes[i]);
for (int texelY = 0; texelY < blockHeight; texelY++)
for (int texelX = 0; texelX < blockWidth; texelX++)
{
const int texelNdx = texelY*blockWidth + texelX;
const int colorEndpointNdx = numPartitions == 1 ? 0 : computeTexelPartition(partitionIndexSeed, texelX, texelY, 0, numPartitions, smallBlock);
DE_ASSERT(colorEndpointNdx < numPartitions);
const UVec4& e0 = colorEndpoints[colorEndpointNdx].e0;
const UVec4& e1 = colorEndpoints[colorEndpointNdx].e1;
const TexelWeightPair& weight = texelWeights[texelNdx];
if (isLDRMode && isHDREndpoint[colorEndpointNdx])
{
if (isSRGB)
{
((deUint8*)dst)[texelNdx*4 + 0] = 0xff;
((deUint8*)dst)[texelNdx*4 + 1] = 0;
((deUint8*)dst)[texelNdx*4 + 2] = 0xff;
((deUint8*)dst)[texelNdx*4 + 3] = 0xff;
}
else
{
((float*)dst)[texelNdx*4 + 0] = 1.0f;
((float*)dst)[texelNdx*4 + 1] = 0;
((float*)dst)[texelNdx*4 + 2] = 1.0f;
((float*)dst)[texelNdx*4 + 3] = 1.0f;
}
}
else
{
for (int channelNdx = 0; channelNdx < 4; channelNdx++)
{
if (!isHDREndpoint[colorEndpointNdx] || (channelNdx == 3 && colorEndpointModes[colorEndpointNdx] == 14)) // \note Alpha for mode 14 is treated the same as LDR.
{
const deUint32 c0 = (e0[channelNdx] << 8) | (isSRGB ? 0x80 : e0[channelNdx]);
const deUint32 c1 = (e1[channelNdx] << 8) | (isSRGB ? 0x80 : e1[channelNdx]);
const deUint32 w = weight.w[ccs == channelNdx ? 1 : 0];
const deUint32 c = (c0*(64-w) + c1*w + 32) / 64;
if (isSRGB)
((deUint8*)dst)[texelNdx*4 + channelNdx] = (c & 0xff00) >> 8;
else
((float*)dst)[texelNdx*4 + channelNdx] = c == 65535 ? 1.0f : (float)c / 65536.0f;
}
else
{
DE_STATIC_ASSERT((isSameType<deFloat16, deUint16>::V));
const deUint32 c0 = e0[channelNdx] << 4;
const deUint32 c1 = e1[channelNdx] << 4;
const deUint32 w = weight.w[ccs == channelNdx ? 1 : 0];
const deUint32 c = (c0*(64-w) + c1*w + 32) / 64;
const deUint32 e = getBits(c, 11, 15);
const deUint32 m = getBits(c, 0, 10);
const deUint32 mt = m < 512 ? 3*m
: m >= 1536 ? 5*m - 2048
: 4*m - 512;
const deFloat16 cf = (e << 10) + (mt >> 3);
((float*)dst)[texelNdx*4 + channelNdx] = deFloat16To32(isFloat16InfOrNan(cf) ? 0x7bff : cf);
}
}
}
}
}
void decompressASTCBlock (void* dst, const Block128& blockData, int blockWidth, int blockHeight, bool isSRGB, bool isLDR)
{
DE_ASSERT(isLDR || !isSRGB);
// Decode block mode.
const ASTCBlockMode blockMode = getASTCBlockMode(blockData.getBits(0, 10));
// Check for block mode errors.
if (blockMode.isError)
{
setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB);
return;
}
// Separate path for void-extent.
if (blockMode.isVoidExtent)
{
decodeVoidExtentBlock(dst, blockData, blockWidth, blockHeight, isSRGB, isLDR);
return;
}
// Compute weight grid values.
const int numWeights = computeNumWeights(blockMode);
const int numWeightDataBits = computeNumRequiredBits(blockMode.weightISEParams, numWeights);
const int numPartitions = (int)blockData.getBits(11, 12) + 1;
// Check for errors in weight grid, partition and dual-plane parameters.
if (numWeights > 64 ||
numWeightDataBits > 96 ||
numWeightDataBits < 24 ||
blockMode.weightGridWidth > blockWidth ||
blockMode.weightGridHeight > blockHeight ||
(numPartitions == 4 && blockMode.isDualPlane))
{
setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB);
return;
}
// Compute number of bits available for color endpoint data.
const bool isSingleUniqueCem = numPartitions == 1 || blockData.getBits(23, 24) == 0;
const int numConfigDataBits = (numPartitions == 1 ? 17 : isSingleUniqueCem ? 29 : 25 + 3*numPartitions) +
(blockMode.isDualPlane ? 2 : 0);
const int numBitsForColorEndpoints = 128 - numWeightDataBits - numConfigDataBits;
const int extraCemBitsStart = 127 - numWeightDataBits - (isSingleUniqueCem ? -1
: numPartitions == 4 ? 7
: numPartitions == 3 ? 4
: numPartitions == 2 ? 1
: 0);
// Decode color endpoint modes.
deUint32 colorEndpointModes[4];
decodeColorEndpointModes(&colorEndpointModes[0], blockData, numPartitions, extraCemBitsStart);
const int numColorEndpointValues = computeNumColorEndpointValues(colorEndpointModes, numPartitions);
// Check for errors in color endpoint value count.
if (numColorEndpointValues > 18 || numBitsForColorEndpoints < divRoundUp(13*numColorEndpointValues, 5))
{
setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB);
return;
}
// Compute color endpoints.
ColorEndpointPair colorEndpoints[4];
computeColorEndpoints(&colorEndpoints[0], blockData, &colorEndpointModes[0], numPartitions, numColorEndpointValues,
computeMaximumRangeISEParams(numBitsForColorEndpoints, numColorEndpointValues), numBitsForColorEndpoints);
// Compute texel weights.
TexelWeightPair texelWeights[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT];
computeTexelWeights(&texelWeights[0], blockData, blockWidth, blockHeight, blockMode);
// Set texel colors.
const int ccs = blockMode.isDualPlane ? (int)blockData.getBits(extraCemBitsStart-2, extraCemBitsStart-1) : -1;
const deUint32 partitionIndexSeed = numPartitions > 1 ? blockData.getBits(13, 22) : (deUint32)-1;
setTexelColors(dst, &colorEndpoints[0], &texelWeights[0], ccs, partitionIndexSeed, numPartitions, blockWidth, blockHeight, isSRGB, isLDR, &colorEndpointModes[0]);
}
} // ASTCDecompressInternal
void decompressASTC (const PixelBufferAccess& dst, const deUint8* data, bool isSRGB, bool isLDR)
{
using namespace ASTCDecompressInternal;
DE_ASSERT(isLDR || !isSRGB);
const int blockWidth = dst.getWidth();
const int blockHeight = dst.getHeight();
union
{
deUint8 sRGB[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT*4];
float linear[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT*4];
} decompressedBuffer;
const Block128 blockData(data);
decompressASTCBlock(isSRGB ? (void*)&decompressedBuffer.sRGB[0] : (void*)&decompressedBuffer.linear[0],
blockData, dst.getWidth(), dst.getHeight(), isSRGB, isLDR);
if (isSRGB)
{
for (int i = 0; i < blockHeight; i++)
for (int j = 0; j < blockWidth; j++)
{
dst.setPixel(IVec4(decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 0],
decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 1],
decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 2],
decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 3]), j, i);
}
}
else
{
for (int i = 0; i < blockHeight; i++)
for (int j = 0; j < blockWidth; j++)
{
dst.setPixel(Vec4(decompressedBuffer.linear[(i*blockWidth + j) * 4 + 0],
decompressedBuffer.linear[(i*blockWidth + j) * 4 + 1],
decompressedBuffer.linear[(i*blockWidth + j) * 4 + 2],
decompressedBuffer.linear[(i*blockWidth + j) * 4 + 3]), j, i);
}
}
}
void decompressBlock (CompressedTexFormat format, const PixelBufferAccess& dst, const deUint8* src, const TexDecompressionParams& params)
{
// No 3D blocks supported right now
DE_ASSERT(dst.getDepth() == 1);
switch (format)
{
case COMPRESSEDTEXFORMAT_ETC1_RGB8: decompressETC1 (dst, src); break;
case COMPRESSEDTEXFORMAT_EAC_R11: decompressEAC_R11 (dst, src, false); break;
case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: decompressEAC_R11 (dst, src, true); break;
case COMPRESSEDTEXFORMAT_EAC_RG11: decompressEAC_RG11 (dst, src, false); break;
case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: decompressEAC_RG11 (dst, src, true); break;
case COMPRESSEDTEXFORMAT_ETC2_RGB8: decompressETC2 (dst, src); break;
case COMPRESSEDTEXFORMAT_ETC2_SRGB8: decompressETC2 (dst, src); break;
case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, src); break;
case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, src); break;
case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: decompressETC2_EAC_RGBA8 (dst, src); break;
case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: decompressETC2_EAC_RGBA8 (dst, src); break;
case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA:
case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8:
case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8:
{
DE_ASSERT(params.astcMode == TexDecompressionParams::ASTCMODE_LDR || params.astcMode == TexDecompressionParams::ASTCMODE_HDR);
const bool isSRGBFormat = isAstcSRGBFormat(format);
decompressASTC(dst, src, isSRGBFormat, isSRGBFormat || params.astcMode == TexDecompressionParams::ASTCMODE_LDR);
break;
}
default:
DE_ASSERT(false);
break;
}
}
int componentSum (const IVec3& vec)
{
return vec.x() + vec.y() + vec.z();
}
} // anonymous
void decompress (const PixelBufferAccess& dst, CompressedTexFormat fmt, const deUint8* src, const TexDecompressionParams& params)
{
const int blockSize = getBlockSize(fmt);
const IVec3 blockPixelSize (getBlockPixelSize(fmt));
const IVec3 blockCount (divRoundUp(dst.getWidth(), blockPixelSize.x()),
divRoundUp(dst.getHeight(), blockPixelSize.y()),
divRoundUp(dst.getDepth(), blockPixelSize.z()));
const IVec3 blockPitches (blockSize, blockSize * blockCount.x(), blockSize * blockCount.x() * blockCount.y());
std::vector<deUint8> uncompressedBlock (dst.getFormat().getPixelSize() * blockPixelSize.x() * blockPixelSize.y() * blockPixelSize.z());
const PixelBufferAccess blockAccess (getUncompressedFormat(fmt), blockPixelSize.x(), blockPixelSize.y(), blockPixelSize.z(), &uncompressedBlock[0]);
DE_ASSERT(dst.getFormat() == getUncompressedFormat(fmt));
for (int blockZ = 0; blockZ < blockCount.z(); blockZ++)
for (int blockY = 0; blockY < blockCount.y(); blockY++)
for (int blockX = 0; blockX < blockCount.x(); blockX++)
{
const IVec3 blockPos (blockX, blockY, blockZ);
const deUint8* const blockPtr = src + componentSum(blockPos * blockPitches);
const IVec3 copySize (de::min(blockPixelSize.x(), dst.getWidth() - blockPos.x() * blockPixelSize.x()),
de::min(blockPixelSize.y(), dst.getHeight() - blockPos.y() * blockPixelSize.y()),
de::min(blockPixelSize.z(), dst.getDepth() - blockPos.z() * blockPixelSize.z()));
const IVec3 dstPixelPos = blockPos * blockPixelSize;
decompressBlock(fmt, blockAccess, blockPtr, params);
copy(getSubregion(dst, dstPixelPos.x(), dstPixelPos.y(), dstPixelPos.z(), copySize.x(), copySize.y(), copySize.z()), getSubregion(blockAccess, 0, 0, 0, copySize.x(), copySize.y(), copySize.z()));
}
}
CompressedTexture::CompressedTexture (void)
: m_format (COMPRESSEDTEXFORMAT_LAST)
, m_width (0)
, m_height (0)
, m_depth (0)
{
}
CompressedTexture::CompressedTexture (CompressedTexFormat format, int width, int height, int depth)
: m_format (COMPRESSEDTEXFORMAT_LAST)
, m_width (0)
, m_height (0)
, m_depth (0)
{
setStorage(format, width, height, depth);
}
CompressedTexture::~CompressedTexture (void)
{
}
void CompressedTexture::setStorage (CompressedTexFormat format, int width, int height, int depth)
{
m_format = format;
m_width = width;
m_height = height;
m_depth = depth;
if (isAstcFormat(m_format) && m_depth > 1)
throw InternalError("3D ASTC textures not currently supported");
if (m_format != COMPRESSEDTEXFORMAT_LAST)
{
const IVec3 blockPixelSize = getBlockPixelSize(m_format);
const int blockSize = getBlockSize(m_format);
m_data.resize(divRoundUp(m_width, blockPixelSize.x()) * divRoundUp(m_height, blockPixelSize.y()) * divRoundUp(m_depth, blockPixelSize.z()) * blockSize);
}
else
{
DE_ASSERT(m_format == COMPRESSEDTEXFORMAT_LAST);
DE_ASSERT(m_width == 0 && m_height == 0 && m_depth == 0);
m_data.resize(0);
}
}
/*--------------------------------------------------------------------*//*!
* \brief Decode to uncompressed pixel data
* \param dst Destination buffer
*//*--------------------------------------------------------------------*/
void CompressedTexture::decompress (const PixelBufferAccess& dst, const TexDecompressionParams& params) const
{
DE_ASSERT(dst.getWidth() == m_width && dst.getHeight() == m_height && dst.getDepth() == m_depth);
DE_ASSERT(dst.getFormat() == getUncompressedFormat(m_format));
tcu::decompress(dst, m_format, &m_data[0], params);
}
} // tcu