1 /////////////////////////////////////////////////////////////////////////// 2 // 3 // Copyright (c) 2004, Industrial Light & Magic, a division of Lucas 4 // Digital Ltd. LLC 5 // 6 // All rights reserved. 7 // 8 // Redistribution and use in source and binary forms, with or without 9 // modification, are permitted provided that the following conditions are 10 // met: 11 // * Redistributions of source code must retain the above copyright 12 // notice, this list of conditions and the following disclaimer. 13 // * Redistributions in binary form must reproduce the above 14 // copyright notice, this list of conditions and the following disclaimer 15 // in the documentation and/or other materials provided with the 16 // distribution. 17 // * Neither the name of Industrial Light & Magic nor the names of 18 // its contributors may be used to endorse or promote products derived 19 // from this software without specific prior written permission. 20 // 21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 // 33 /////////////////////////////////////////////////////////////////////////// 34 35 36 37 //----------------------------------------------------------------------------- 38 // 39 // class Compressor 40 // 41 //----------------------------------------------------------------------------- 42 43 #include <ImfCompressor.h> 44 #include <ImfRleCompressor.h> 45 #include <ImfZipCompressor.h> 46 #include <ImfPizCompressor.h> 47 #include <ImfPxr24Compressor.h> 48 #include <ImfB44Compressor.h> 49 #include <ImfCheckedArithmetic.h> 50 51 namespace Imf { 52 53 using Imath::Box2i; 54 55 56 Compressor::Compressor (const Header &hdr): _header (hdr) {} 57 58 59 Compressor::~Compressor () {} 60 61 62 Compressor::Format 63 Compressor::format () const 64 { 65 return XDR; 66 } 67 68 69 int 70 Compressor::compressTile (const char *inPtr, 71 int inSize, 72 Box2i range, 73 const char *&outPtr) 74 { 75 return compress (inPtr, inSize, range.min.y, outPtr); 76 } 77 78 79 int 80 Compressor::uncompressTile (const char *inPtr, 81 int inSize, 82 Box2i range, 83 const char *&outPtr) 84 { 85 return uncompress (inPtr, inSize, range.min.y, outPtr); 86 } 87 88 89 bool 90 isValidCompression (Compression c) 91 { 92 switch (c) 93 { 94 case NO_COMPRESSION: 95 case RLE_COMPRESSION: 96 case ZIPS_COMPRESSION: 97 case ZIP_COMPRESSION: 98 case PIZ_COMPRESSION: 99 case PXR24_COMPRESSION: 100 case B44_COMPRESSION: 101 case B44A_COMPRESSION: 102 103 return true; 104 105 default: 106 107 return false; 108 } 109 } 110 111 112 Compressor * 113 newCompressor (Compression c, size_t maxScanLineSize, const Header &hdr) 114 { 115 switch (c) 116 { 117 case RLE_COMPRESSION: 118 119 return new RleCompressor (hdr, maxScanLineSize); 120 121 case ZIPS_COMPRESSION: 122 123 return new ZipCompressor (hdr, maxScanLineSize, 1); 124 125 case ZIP_COMPRESSION: 126 127 return new ZipCompressor (hdr, maxScanLineSize, 16); 128 129 case PIZ_COMPRESSION: 130 131 return new PizCompressor (hdr, maxScanLineSize, 32); 132 133 case PXR24_COMPRESSION: 134 135 return new Pxr24Compressor (hdr, maxScanLineSize, 16); 136 137 case B44_COMPRESSION: 138 139 return new B44Compressor (hdr, maxScanLineSize, 32, false); 140 141 case B44A_COMPRESSION: 142 143 return new B44Compressor (hdr, maxScanLineSize, 32, true); 144 145 default: 146 147 return 0; 148 } 149 } 150 151 152 Compressor * 153 newTileCompressor (Compression c, 154 size_t tileLineSize, 155 size_t numTileLines, 156 const Header &hdr) 157 { 158 switch (c) 159 { 160 case RLE_COMPRESSION: 161 162 return new RleCompressor (hdr, uiMult (tileLineSize, numTileLines)); 163 164 case ZIPS_COMPRESSION: 165 case ZIP_COMPRESSION: 166 167 return new ZipCompressor (hdr, tileLineSize, numTileLines); 168 169 case PIZ_COMPRESSION: 170 171 return new PizCompressor (hdr, tileLineSize, numTileLines); 172 173 case PXR24_COMPRESSION: 174 175 return new Pxr24Compressor (hdr, tileLineSize, numTileLines); 176 177 case B44_COMPRESSION: 178 179 return new B44Compressor (hdr, tileLineSize, numTileLines, false); 180 181 case B44A_COMPRESSION: 182 183 return new B44Compressor (hdr, tileLineSize, numTileLines, true); 184 185 default: 186 187 return 0; 188 } 189 } 190 191 192 } // namespace Imf 193
