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Open Source Computer Vision Library
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135 lines
3.4 KiB
135 lines
3.4 KiB
/////////////////////////////////////////////////////////////////////////// |
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// |
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// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas |
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// Digital Ltd. LLC |
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// |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Industrial Light & Magic nor the names of |
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// its contributors may be used to endorse or promote products derived |
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// from this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// |
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/////////////////////////////////////////////////////////////////////////// |
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//----------------------------------------------------------------------------- |
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// |
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// Utility routines to test quickly if a given |
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// file is an OpenEXR file, and whether the |
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// file is scanline-based or tiled. |
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// |
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//----------------------------------------------------------------------------- |
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#include <ImfTestFile.h> |
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#include <ImfStdIO.h> |
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#include <ImfXdr.h> |
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#include <ImfVersion.h> |
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namespace Imf { |
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bool |
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isOpenExrFile (const char fileName[], bool &tiled) |
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{ |
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try |
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{ |
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StdIFStream is (fileName); |
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int magic, version; |
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Xdr::read <StreamIO> (is, magic); |
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Xdr::read <StreamIO> (is, version); |
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tiled = isTiled (version); |
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return magic == MAGIC; |
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} |
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catch (...) |
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{ |
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tiled = false; |
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return false; |
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} |
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} |
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bool |
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isOpenExrFile (const char fileName[]) |
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{ |
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bool tiled; |
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return isOpenExrFile (fileName, tiled); |
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} |
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bool |
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isTiledOpenExrFile (const char fileName[]) |
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{ |
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bool exr, tiled; |
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exr = isOpenExrFile (fileName, tiled); |
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return exr && tiled; |
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} |
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bool |
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isOpenExrFile (IStream &is, bool &tiled) |
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{ |
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try |
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{ |
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Int64 pos = is.tellg(); |
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if (pos != 0) |
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is.seekg (0); |
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int magic, version; |
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Xdr::read <StreamIO> (is, magic); |
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Xdr::read <StreamIO> (is, version); |
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is.seekg (pos); |
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tiled = isTiled (version); |
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return magic == MAGIC; |
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} |
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catch (...) |
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{ |
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is.clear(); |
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tiled = false; |
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return false; |
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} |
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} |
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bool |
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isOpenExrFile (IStream &is) |
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{ |
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bool tiled; |
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return isOpenExrFile (is, tiled); |
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} |
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bool |
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isTiledOpenExrFile (IStream &is) |
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{ |
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bool exr, tiled; |
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exr = isOpenExrFile (is, tiled); |
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return exr && tiled; |
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} |
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} // namespace Imf
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