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cs440-acg/ext/openexr/OpenEXR/IlmImfUtil/ImfImageIO.cpp

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+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2014, 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.
+//
+///////////////////////////////////////////////////////////////////////////
+
+//----------------------------------------------------------------------------
+//
+//      OpenEXR file I/O for deep images.
+//
+//----------------------------------------------------------------------------
+
+#include "ImfImageIO.h"
+#include "ImfFlatImageIO.h"
+#include "ImfDeepImageIO.h"
+#include <ImfMultiPartInputFile.h>
+#include <ImfHeader.h>
+#include <ImfTestFile.h>
+#include <ImfPartType.h>
+#include <Iex.h>
+
+using namespace IMATH_NAMESPACE;
+using namespace IEX_NAMESPACE;
+using namespace std;
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
+
+
+void
+saveImage
+    (const string &fileName,
+     const Header &hdr,
+     const Image &img,
+     DataWindowSource dws)
+{
+    if (const FlatImage *fimg = dynamic_cast <const FlatImage *> (&img))
+    {
+        if (fimg->levelMode() != ONE_LEVEL || hdr.hasTileDescription())
+            saveFlatTiledImage (fileName, hdr, *fimg, dws);
+        else
+            saveFlatScanLineImage (fileName, hdr, *fimg, dws);
+    }
+
+    if (const DeepImage *dimg = dynamic_cast <const DeepImage *> (&img))
+    {
+        if (dimg->levelMode() != ONE_LEVEL || hdr.hasTileDescription())
+            saveDeepTiledImage (fileName, hdr, *dimg, dws);
+        else
+            saveDeepScanLineImage (fileName, hdr, *dimg, dws);
+    }
+}
+
+
+void
+saveImage (const string &fileName, const Image &img)
+{
+    Header hdr;
+    hdr.displayWindow() = img.dataWindow();
+    saveImage (fileName, hdr, img);
+}
+
+
+Image *
+loadImage (const string &fileName, Header &hdr)
+{
+    bool tiled, deep, multiPart;
+
+    if (!isOpenExrFile (fileName.c_str(), tiled, deep, multiPart))
+    {
+        THROW (ArgExc, "Cannot load image file " << fileName << ".  "
+                       "The file is not an OpenEXR file.");
+    }
+
+    if (multiPart)
+    {
+        THROW (ArgExc, "Cannot load image file " << fileName << ".  "
+                       "Multi-part file loading is not supported.");
+    }
+
+    //XXX TODO: the tiled flag obtained above is unreliable;
+    // open the file as a multi-part file and inspect the header.
+    // Can the IlmImf library be fixed?
+
+    {
+        MultiPartInputFile mpi (fileName.c_str());
+
+        tiled = (mpi.parts() > 0 &&
+                 mpi.header(0).hasType() &&
+                 isTiled (mpi.header(0).type()));
+    }
+
+    Image *img = 0;
+
+    try
+    {
+        if (deep)
+        {
+            DeepImage *dimg = new DeepImage;
+            img = dimg;
+
+            if (tiled)
+                loadDeepTiledImage (fileName, hdr, *dimg);
+            else
+                loadDeepScanLineImage (fileName, hdr, *dimg);
+        }
+        else
+        {
+            FlatImage *fimg = new FlatImage;
+            img = fimg;
+
+            if (tiled)
+                loadFlatTiledImage (fileName, hdr, *fimg);
+            else
+                loadFlatScanLineImage (fileName, hdr, *fimg);
+        }
+    }
+    catch (...)
+    {
+        delete img;
+        throw;
+    }
+
+    return img;
+}
+
+
+Image *
+loadImage (const string &fileName)
+{
+    Header hdr;
+    return loadImage (fileName, hdr);
+}
+
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT