ImfTestFile.cpp 3.35 KB
Newer Older
wester committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135
///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// *       Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------
//
//	Utility routines to test quickly if a given
//	file is an OpenEXR file, and whether the
//	file is scanline-based or tiled.
//
//-----------------------------------------------------------------------------


#include <ImfTestFile.h>
#include <ImfStdIO.h>
#include <ImfXdr.h>
#include <ImfVersion.h>

namespace Imf {


bool
isOpenExrFile (const char fileName[], bool &tiled)
{
    try
    {
    StdIFStream is (fileName);

    int magic, version;
    Xdr::read <StreamIO> (is, magic);
    Xdr::read <StreamIO> (is, version);

    tiled = isTiled (version);
    return magic == MAGIC;
    }
    catch (...)
    {
    tiled = false;
    return false;
    }
}


bool
isOpenExrFile (const char fileName[])
{
    bool tiled;
    return isOpenExrFile (fileName, tiled);
}


bool
isTiledOpenExrFile (const char fileName[])
{
    bool exr, tiled;
    exr = isOpenExrFile (fileName, tiled);
    return exr && tiled;
}


bool
isOpenExrFile (IStream &is, bool &tiled)
{
    try
    {
    Int64 pos = is.tellg();

    if (pos != 0)
        is.seekg (0);

    int magic, version;
    Xdr::read <StreamIO> (is, magic);
    Xdr::read <StreamIO> (is, version);

    is.seekg (pos);

    tiled = isTiled (version);
    return magic == MAGIC;
    }
    catch (...)
    {
    is.clear();
    tiled = false;
    return false;
    }
}


bool
isOpenExrFile (IStream &is)
{
    bool tiled;
    return isOpenExrFile (is, tiled);
}


bool
isTiledOpenExrFile (IStream &is)
{
    bool exr, tiled;
    exr = isOpenExrFile (is, tiled);
    return exr && tiled;
}

} // namespace Imf