diff --git a/PVRTCEncoder/CMakeLists.txt b/PVRTCEncoder/CMakeLists.txt index 54cad9b..60e9128 100644 --- a/PVRTCEncoder/CMakeLists.txt +++ b/PVRTCEncoder/CMakeLists.txt @@ -57,11 +57,13 @@ INCLUDE_DIRECTORIES(${FasTC_BINARY_DIR}/PVRTCEncoder/include) SET( HEADERS include/PVRTCCompressor.h src/Pixel.h + src/Block.h ) SET( SOURCES src/Decompressor.cpp src/Pixel.cpp + src/Block.cpp ) ADD_LIBRARY( PVRTCEncoder diff --git a/PVRTCEncoder/src/Block.cpp b/PVRTCEncoder/src/Block.cpp new file mode 100644 index 0000000..ab38131 --- /dev/null +++ b/PVRTCEncoder/src/Block.cpp @@ -0,0 +1,105 @@ +/* FasTC + * Copyright (c) 2013 University of North Carolina at Chapel Hill. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for educational, research, and non-profit purposes, without + * fee, and without a written agreement is hereby granted, provided that the + * above copyright notice, this paragraph, and the following four paragraphs + * appear in all copies. + * + * Permission to incorporate this software into commercial products may be + * obtained by contacting the authors or the Office of Technology Development + * at the University of North Carolina at Chapel Hill . + * + * This software program and documentation are copyrighted by the University of + * North Carolina at Chapel Hill. The software program and documentation are + * supplied "as is," without any accompanying services from the University of + * North Carolina at Chapel Hill or the authors. The University of North + * Carolina at Chapel Hill and the authors do not warrant that the operation of + * the program will be uninterrupted or error-free. The end-user understands + * that the program was developed for research purposes and is advised not to + * rely exclusively on the program for any reason. + * + * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE + * AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, + * OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF + * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA + * AT CHAPEL HILL OR THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY + * DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY + * STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON + * AN "AS IS" BASIS, AND THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND + * THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, + * ENHANCEMENTS, OR MODIFICATIONS. + * + * Please send all BUG REPORTS to . + * + * The authors may be contacted via: + * + * Pavel Krajcevski + * Dept of Computer Science + * 201 S Columbia St + * Frederick P. Brooks, Jr. Computer Science Bldg + * Chapel Hill, NC 27599-3175 + * USA + * + * + */ + +#include "Block.h" + +#include +#include + +namespace PVRTCC { + + Block::Block(uint8 *data) + : m_ColorACached(false) + , m_ColorBCached(false) { + assert(data); + memcpy(m_ByteData, data, sizeof(m_ByteData)); + } + + Pixel Block::GetColorA() { + if(m_ColorACached) { + return m_ColorA; + } + + bool isOpaque = static_cast(m_ByteData[0] & 0x80); + const uint8 opaqueBitDepths[4] = { 0, 5, 5, 5 }; + const uint8 transBitDepths[4] = { 3, 4, 4, 4 }; + + m_ColorA = Pixel(m_ByteData, isOpaque? opaqueBitDepths : transBitDepths); + m_ColorACached = true; + return m_ColorA; + } + + Pixel Block::GetColorB() { + if(m_ColorBCached) { + return m_ColorB; + } + + bool isOpaque = static_cast(m_ByteData[2] & 0x80); + const uint8 opaqueBitDepths[4] = { 0, 5, 5, 4 }; + const uint8 transBitDepths[4] = { 3, 4, 4, 3 }; + const uint8 *bitDepths = isOpaque? opaqueBitDepths : transBitDepths; + + m_ColorB = Pixel(m_ByteData + 2, bitDepths, 1); + m_ColorBCached = true; + return m_ColorB; + } + + uint8 Block::GetLerpValue(uint32 texelIdx) const { + assert(texelIdx >= 0); + assert(texelIdx <= 15); + + const uint8 texel = 15 - texelIdx; + const uint8 *texelData = m_ByteData + 4; + return (texelData[texel / 4] >> (2 * (3 - (texel % 4)))) & 0x3; + } + +} // namespace PVRTCC diff --git a/PVRTCEncoder/src/Block.h b/PVRTCEncoder/src/Block.h new file mode 100644 index 0000000..76eb2c0 --- /dev/null +++ b/PVRTCEncoder/src/Block.h @@ -0,0 +1,93 @@ +/* FasTC + * Copyright (c) 2013 University of North Carolina at Chapel Hill. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for educational, research, and non-profit purposes, without + * fee, and without a written agreement is hereby granted, provided that the + * above copyright notice, this paragraph, and the following four paragraphs + * appear in all copies. + * + * Permission to incorporate this software into commercial products may be + * obtained by contacting the authors or the Office of Technology Development + * at the University of North Carolina at Chapel Hill . + * + * This software program and documentation are copyrighted by the University of + * North Carolina at Chapel Hill. The software program and documentation are + * supplied "as is," without any accompanying services from the University of + * North Carolina at Chapel Hill or the authors. The University of North + * Carolina at Chapel Hill and the authors do not warrant that the operation of + * the program will be uninterrupted or error-free. The end-user understands + * that the program was developed for research purposes and is advised not to + * rely exclusively on the program for any reason. + * + * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE + * AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, + * OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF + * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA + * AT CHAPEL HILL OR THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY + * DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY + * STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON + * AN "AS IS" BASIS, AND THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND + * THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, + * ENHANCEMENTS, OR MODIFICATIONS. + * + * Please send all BUG REPORTS to . + * + * The authors may be contacted via: + * + * Pavel Krajcevski + * Dept of Computer Science + * 201 S Columbia St + * Frederick P. Brooks, Jr. Computer Science Bldg + * Chapel Hill, NC 27599-3175 + * USA + * + * + */ + +#ifndef PVRTCENCODER_SRC_BLOCK_H_ +#define PVRTCENCODER_SRC_BLOCK_H_ + +#include "TexCompTypes.h" + +#include "Pixel.h" + +namespace PVRTCC { + +class Block { + public: + explicit Block(uint8 *data); + + Pixel GetColorA(); + Pixel GetColorB(); + + bool GetModeBit() const { + return static_cast(m_ByteData[3] & 0x1); + } + + // Returns the modulation value for the texel in the 4x4 block. The texels are + // numbered as follows: + // 0 1 2 3 + // 4 5 6 7 + // 8 9 10 11 + // 12 13 14 15 + uint8 GetLerpValue(uint32 texelIdx) const; + + private: + uint8 m_ByteData[8]; + + bool m_ColorACached; + Pixel m_ColorA; + + bool m_ColorBCached; + Pixel m_ColorB; +}; + +} // namespace PVRTCC + +#endif // PVRTCENCODER_SRC_BLOCK_H_