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136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////
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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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