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 49namespace Imf { 50 51 52bool 53isOpenExrFile (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 74bool 75isOpenExrFile (const char fileName[]) 76{ 77 bool tiled; 78 return isOpenExrFile (fileName, tiled); 79} 80 81 82bool 83isTiledOpenExrFile (const char fileName[]) 84{ 85 bool exr, tiled; 86 exr = isOpenExrFile (fileName, tiled); 87 return exr && tiled; 88} 89 90 91bool 92isOpenExrFile (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 119bool 120isOpenExrFile (IStream &is) 121{ 122 bool tiled; 123 return isOpenExrFile (is, tiled); 124} 125 126 127bool 128isTiledOpenExrFile (IStream &is) 129{ 130 bool exr, tiled; 131 exr = isOpenExrFile (is, tiled); 132 return exr && tiled; 133} 134 135} // namespace Imf 136