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 // Utility routines to test quickly if a given 38 // file is an OpenEXR file, and whether the 39 // file is scanline-based or tiled. 40 // 41 //----------------------------------------------------------------------------- 42 43 44 #include <ImfTestFile.h> 45 #include <ImfStdIO.h> 46 #include <ImfXdr.h> 47 #include <ImfVersion.h> 48 49 namespace Imf { 50 51 52 bool 53 isOpenExrFile (const char fileName[], bool &tiled) 54 { 55 try 56 { 57 StdIFStream is (fileName); 58 59 int magic, version; 60 Xdr::read <StreamIO> (is, magic); 61 Xdr::read <StreamIO> (is, version); 62 63 tiled = isTiled (version); 64 return magic == MAGIC; 65 } 66 catch (...) 67 { 68 tiled = false; 69 return false; 70 } 71 } 72 73 74 bool 75 isOpenExrFile (const char fileName[]) 76 { 77 bool tiled; 78 return isOpenExrFile (fileName, tiled); 79 } 80 81 82 bool 83 isTiledOpenExrFile (const char fileName[]) 84 { 85 bool exr, tiled; 86 exr = isOpenExrFile (fileName, tiled); 87 return exr && tiled; 88 } 89 90 91 bool 92 isOpenExrFile (IStream &is, bool &tiled) 93 { 94 try 95 { 96 Int64 pos = is.tellg(); 97 98 if (pos != 0) 99 is.seekg (0); 100 101 int magic, version; 102 Xdr::read <StreamIO> (is, magic); 103 Xdr::read <StreamIO> (is, version); 104 105 is.seekg (pos); 106 107 tiled = isTiled (version); 108 return magic == MAGIC; 109 } 110 catch (...) 111 { 112 is.clear(); 113 tiled = false; 114 return false; 115 } 116 } 117 118 119 bool 120 isOpenExrFile (IStream &is) 121 { 122 bool tiled; 123 return isOpenExrFile (is, tiled); 124 } 125 126 127 bool 128 isTiledOpenExrFile (IStream &is) 129 { 130 bool exr, tiled; 131 exr = isOpenExrFile (is, tiled); 132 return exr && tiled; 133 } 134 135 } // namespace Imf 136
