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cs440-acg/ext/openexr/OpenEXR/IlmImf/ImfCompressor.cpp

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+///////////////////////////////////////////////////////////////////////////
+//
+// 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.
+//
+///////////////////////////////////////////////////////////////////////////
+
+
+
+//-----------------------------------------------------------------------------
+//
+//	class Compressor
+//
+//-----------------------------------------------------------------------------
+
+#include "ImfCompressor.h"
+#include "ImfRleCompressor.h"
+#include "ImfZipCompressor.h"
+#include "ImfPizCompressor.h"
+#include "ImfPxr24Compressor.h"
+#include "ImfB44Compressor.h"
+#include "ImfDwaCompressor.h"
+#include "ImfCheckedArithmetic.h"
+#include "ImfNamespace.h"
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
+
+using IMATH_NAMESPACE::Box2i;
+
+
+Compressor::Compressor (const Header &hdr): _header (hdr) {}
+
+
+Compressor::~Compressor () {}
+
+
+Compressor::Format
+Compressor::format () const
+{
+    return XDR;
+}
+
+
+int
+Compressor::compressTile (const char *inPtr,
+			  int inSize,
+			  Box2i range,
+			  const char *&outPtr)
+{
+    return compress (inPtr, inSize, range.min.y, outPtr);
+}
+
+             
+int
+Compressor::uncompressTile (const char *inPtr,
+			    int inSize,
+			    Box2i range,
+			    const char *&outPtr)
+{
+    return uncompress (inPtr, inSize, range.min.y, outPtr);
+}
+
+
+bool	
+isValidCompression (Compression c)
+{
+    switch (c)
+    {
+      case NO_COMPRESSION:
+      case RLE_COMPRESSION:
+      case ZIPS_COMPRESSION:
+      case ZIP_COMPRESSION:
+      case PIZ_COMPRESSION:
+      case PXR24_COMPRESSION:
+      case B44_COMPRESSION:
+      case B44A_COMPRESSION:
+      case DWAA_COMPRESSION:
+      case DWAB_COMPRESSION:
+
+	return true;
+
+      default:
+
+	return false;
+    }
+}
+
+bool isValidDeepCompression(Compression c)
+{
+  switch(c)
+  {
+      case NO_COMPRESSION:
+      case RLE_COMPRESSION:
+      case ZIPS_COMPRESSION:
+          return true;
+      default :
+          return false;
+  }
+}
+
+
+Compressor *
+newCompressor (Compression c, size_t maxScanLineSize, const Header &hdr)
+{
+    switch (c)
+    {
+      case RLE_COMPRESSION:
+
+	return new RleCompressor (hdr, maxScanLineSize);
+
+      case ZIPS_COMPRESSION:
+
+	return new ZipCompressor (hdr, maxScanLineSize, 1);
+
+      case ZIP_COMPRESSION:
+
+	return new ZipCompressor (hdr, maxScanLineSize, 16);
+
+      case PIZ_COMPRESSION:
+
+	return new PizCompressor (hdr, maxScanLineSize, 32);
+
+      case PXR24_COMPRESSION:
+
+	return new Pxr24Compressor (hdr, maxScanLineSize, 16);
+
+      case B44_COMPRESSION:
+
+	return new B44Compressor (hdr, maxScanLineSize, 32, false);
+
+      case B44A_COMPRESSION:
+
+	return new B44Compressor (hdr, maxScanLineSize, 32, true);
+
+      case DWAA_COMPRESSION:
+
+	return new DwaCompressor (hdr, maxScanLineSize, 32, 
+                               DwaCompressor::STATIC_HUFFMAN);
+
+      case DWAB_COMPRESSION:
+
+	return new DwaCompressor (hdr, maxScanLineSize, 256, 
+                               DwaCompressor::STATIC_HUFFMAN);
+
+      default:
+
+	return 0;
+    }
+}
+
+
+Compressor *
+newTileCompressor (Compression c,
+		   size_t tileLineSize,
+		   size_t numTileLines,
+		   const Header &hdr)
+{
+    switch (c)
+    {
+      case RLE_COMPRESSION:
+
+	return new RleCompressor (hdr, uiMult (tileLineSize, numTileLines));
+
+      case ZIPS_COMPRESSION:
+      case ZIP_COMPRESSION:
+
+	return new ZipCompressor (hdr, tileLineSize, numTileLines);
+
+      case PIZ_COMPRESSION:
+
+	return new PizCompressor (hdr, tileLineSize, numTileLines);
+
+      case PXR24_COMPRESSION:
+
+	return new Pxr24Compressor (hdr, tileLineSize, numTileLines);
+
+      case B44_COMPRESSION:
+
+	return new B44Compressor (hdr, tileLineSize, numTileLines, false);
+
+      case B44A_COMPRESSION:
+
+	return new B44Compressor (hdr, tileLineSize, numTileLines, true);
+
+      case DWAA_COMPRESSION:
+      case DWAB_COMPRESSION:
+
+	return new DwaCompressor (hdr, tileLineSize, numTileLines, 
+                               DwaCompressor::DEFLATE);
+
+      default:
+
+	return 0;
+    }
+}
+
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
+