/* * $Id$ * * ***** BEGIN GPL LICENSE BLOCK ***** * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * Contributors: Amorilia (amorilia@users.sourceforge.net) * * ***** END GPL LICENSE BLOCK ***** */ /** \file blender/imbuf/intern/dds/BlockDXT.h * \ingroup imbdds */ /* * This file is based on a similar file from the NVIDIA texture tools * (http://nvidia-texture-tools.googlecode.com/) * * Original license from NVIDIA follows. */ // Copyright NVIDIA Corporation 2007 -- Ignacio Castano // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, // copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following // conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR // OTHER DEALINGS IN THE SOFTWARE. #ifndef _DDS_BLOCKDXT_H #define _DDS_BLOCKDXT_H #include #include #include #include /// DXT1 block. struct BlockDXT1 { Color16 col0; Color16 col1; union { uint8 row[4]; uint indices; }; bool isFourColorMode() const; uint evaluatePalette(Color32 color_array[4]) const; uint evaluatePaletteNV5x(Color32 color_array[4]) const; void evaluatePalette3(Color32 color_array[4]) const; void evaluatePalette4(Color32 color_array[4]) const; void decodeBlock(ColorBlock * block) const; void decodeBlockNV5x(ColorBlock * block) const; void setIndices(int * idx); void flip4(); void flip2(); }; /// Return true if the block uses four color mode, false otherwise. inline bool BlockDXT1::isFourColorMode() const { return col0.u > col1.u; } /// DXT3 alpha block with explicit alpha. struct AlphaBlockDXT3 { union { struct { uint alpha0 : 4; uint alpha1 : 4; uint alpha2 : 4; uint alpha3 : 4; uint alpha4 : 4; uint alpha5 : 4; uint alpha6 : 4; uint alpha7 : 4; uint alpha8 : 4; uint alpha9 : 4; uint alphaA : 4; uint alphaB : 4; uint alphaC : 4; uint alphaD : 4; uint alphaE : 4; uint alphaF : 4; }; uint16 row[4]; }; void decodeBlock(ColorBlock * block) const; void flip4(); void flip2(); }; /// DXT3 block. struct BlockDXT3 { AlphaBlockDXT3 alpha; BlockDXT1 color; void decodeBlock(ColorBlock * block) const; void decodeBlockNV5x(ColorBlock * block) const; void flip4(); void flip2(); }; /// DXT5 alpha block. struct AlphaBlockDXT5 { // uint64 unions do not compile on all platforms /* union { struct { uint64 alpha0 : 8; // 8 uint64 alpha1 : 8; // 16 uint64 bits0 : 3; // 3 - 19 uint64 bits1 : 3; // 6 - 22 uint64 bits2 : 3; // 9 - 25 uint64 bits3 : 3; // 12 - 28 uint64 bits4 : 3; // 15 - 31 uint64 bits5 : 3; // 18 - 34 uint64 bits6 : 3; // 21 - 37 uint64 bits7 : 3; // 24 - 40 uint64 bits8 : 3; // 27 - 43 uint64 bits9 : 3; // 30 - 46 uint64 bitsA : 3; // 33 - 49 uint64 bitsB : 3; // 36 - 52 uint64 bitsC : 3; // 39 - 55 uint64 bitsD : 3; // 42 - 58 uint64 bitsE : 3; // 45 - 61 uint64 bitsF : 3; // 48 - 64 }; uint64 u; }; */ uint64 u; uint8 alpha0() const { return u & 0xffLL; }; uint8 alpha1() const { return (u >> 8) & 0xffLL; }; uint8 bits0() const { return (u >> 16) & 0x7LL; }; uint8 bits1() const { return (u >> 19) & 0x7LL; }; uint8 bits2() const { return (u >> 22) & 0x7LL; }; uint8 bits3() const { return (u >> 25) & 0x7LL; }; uint8 bits4() const { return (u >> 28) & 0x7LL; }; uint8 bits5() const { return (u >> 31) & 0x7LL; }; uint8 bits6() const { return (u >> 34) & 0x7LL; }; uint8 bits7() const { return (u >> 37) & 0x7LL; }; uint8 bits8() const { return (u >> 40) & 0x7LL; }; uint8 bits9() const { return (u >> 43) & 0x7LL; }; uint8 bitsA() const { return (u >> 46) & 0x7LL; }; uint8 bitsB() const { return (u >> 49) & 0x7LL; }; uint8 bitsC() const { return (u >> 52) & 0x7LL; }; uint8 bitsD() const { return (u >> 55) & 0x7LL; }; uint8 bitsE() const { return (u >> 58) & 0x7LL; }; uint8 bitsF() const { return (u >> 61) & 0x7LL; }; void evaluatePalette(uint8 alpha[8]) const; void evaluatePalette8(uint8 alpha[8]) const; void evaluatePalette6(uint8 alpha[8]) const; void indices(uint8 index_array[16]) const; uint index(uint index) const; void setIndex(uint index, uint value); void decodeBlock(ColorBlock * block) const; void flip4(); void flip2(); }; /// DXT5 block. struct BlockDXT5 { AlphaBlockDXT5 alpha; BlockDXT1 color; void decodeBlock(ColorBlock * block) const; void decodeBlockNV5x(ColorBlock * block) const; void flip4(); void flip2(); }; /// ATI1 block. struct BlockATI1 { AlphaBlockDXT5 alpha; void decodeBlock(ColorBlock * block) const; void flip4(); void flip2(); }; /// ATI2 block. struct BlockATI2 { AlphaBlockDXT5 x; AlphaBlockDXT5 y; void decodeBlock(ColorBlock * block) const; void flip4(); void flip2(); }; /// CTX1 block. struct BlockCTX1 { uint8 col0[2]; uint8 col1[2]; union { uint8 row[4]; uint indices; }; void evaluatePalette(Color32 color_array[4]) const; void setIndices(int * idx); void decodeBlock(ColorBlock * block) const; void flip4(); void flip2(); }; void mem_read(Stream & mem, BlockDXT1 & block); void mem_read(Stream & mem, AlphaBlockDXT3 & block); void mem_read(Stream & mem, BlockDXT3 & block); void mem_read(Stream & mem, AlphaBlockDXT5 & block); void mem_read(Stream & mem, BlockDXT5 & block); void mem_read(Stream & mem, BlockATI1 & block); void mem_read(Stream & mem, BlockATI2 & block); void mem_read(Stream & mem, BlockCTX1 & block); #endif // _DDS_BLOCKDXT_H