1 files changed, 276 insertions, 0 deletions
diff --git a/sd/source/ui/slidesorter/cache/SlsBitmapCompressor.cxx b/sd/source/ui/slidesorter/cache/SlsBitmapCompressor.cxx
new file mode 100644
index 000000000000..67f031ffb0ae
--- /dev/null
+++ b/sd/source/ui/slidesorter/cache/SlsBitmapCompressor.cxx
@@ -0,0 +1,276 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: SlsBitmapCompressor.cxx,v $
+ * $Revision: 1.6 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_sd.hxx"
+
+#include "SlsBitmapCompressor.hxx"
+
+#include <tools/stream.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/pngread.hxx>
+#include <vcl/pngwrite.hxx>
+
+namespace sd { namespace slidesorter { namespace cache {
+
+
+//===== NoBitmapCompression ===================================================
+
+/** This dummy replacement simply stores a shared pointer to the original
+    preview bitmap.
+*/
+class NoBitmapCompression::DummyReplacement
+    : public BitmapReplacement
+{
+public:
+    ::boost::shared_ptr<BitmapEx> mpPreview;
+    Size maOriginalSize;
+
+    DummyReplacement (const ::boost::shared_ptr<BitmapEx>& rpPreview) : mpPreview(rpPreview)
+    {
+    }
+
+    virtual ~DummyReplacement();
+
+    virtual sal_Int32 GetMemorySize (void) const;
+};
+
+NoBitmapCompression::DummyReplacement::~DummyReplacement()
+{
+}
+
+sal_Int32 NoBitmapCompression::DummyReplacement::GetMemorySize (void) const
+{
+    return mpPreview->GetSizeBytes();
+}
+
+::boost::shared_ptr<BitmapReplacement> NoBitmapCompression::Compress (
+    const ::boost::shared_ptr<BitmapEx>& rpBitmap) const
+{
+    return ::boost::shared_ptr<BitmapReplacement>(new DummyReplacement(rpBitmap));
+}
+
+::boost::shared_ptr<BitmapEx> NoBitmapCompression::Decompress (
+    const BitmapReplacement& rBitmapData) const
+{
+    return dynamic_cast<const DummyReplacement&>(rBitmapData).mpPreview;
+}
+
+
+
+
+bool NoBitmapCompression::IsLossless (void) const
+{
+    return true;
+}
+
+
+
+
+//===== CompressionByDeletion =================================================
+
+::boost::shared_ptr<BitmapReplacement> CompressionByDeletion::Compress (
+    const ::boost::shared_ptr<BitmapEx>& ) const
+{
+    return ::boost::shared_ptr<BitmapReplacement>();
+}
+
+
+
+
+::boost::shared_ptr<BitmapEx> CompressionByDeletion::Decompress (
+    const BitmapReplacement& ) const
+{
+    // Return a NULL pointer.  This will eventually lead to a request for
+    // the creation of a new one.
+    return ::boost::shared_ptr<BitmapEx>();
+}
+
+
+
+
+bool CompressionByDeletion::IsLossless (void) const
+{
+    return false;
+}
+
+
+
+
+//===== ResolutionReduction ===================================================
+
+/** Store a scaled down bitmap together with the original size.
+*/
+class ResolutionReduction::ResolutionReducedReplacement : public BitmapReplacement
+{
+public:
+    ::boost::shared_ptr<BitmapEx> mpPreview;
+    Size maOriginalSize;
+
+    virtual ~ResolutionReducedReplacement();
+
+    virtual sal_Int32 GetMemorySize (void) const;
+};
+
+ResolutionReduction::ResolutionReducedReplacement::~ResolutionReducedReplacement()
+{
+}
+
+sal_Int32 ResolutionReduction::ResolutionReducedReplacement::GetMemorySize (void) const
+{
+    if (mpPreview.get() != NULL)
+        return mpPreview->GetSizeBytes();
+    else
+        return 0;
+}
+
+::boost::shared_ptr<BitmapReplacement> ResolutionReduction::Compress (
+    const ::boost::shared_ptr<BitmapEx>& rpBitmap) const
+{
+    ResolutionReducedReplacement* pResult = new ResolutionReducedReplacement();
+    pResult->mpPreview.reset(new BitmapEx(*rpBitmap));
+    Size aSize (rpBitmap->GetSizePixel());
+    pResult->maOriginalSize = aSize;
+    if (aSize.Width()>0 && aSize.Width()<mnWidth)
+    {
+        int nHeight = aSize.Height() * mnWidth / aSize.Width() ;
+        pResult->mpPreview->Scale(Size(mnWidth,nHeight));
+    }
+
+    return ::boost::shared_ptr<BitmapReplacement>(pResult);
+}
+
+
+
+
+::boost::shared_ptr<BitmapEx> ResolutionReduction::Decompress (
+    const BitmapReplacement& rBitmapData) const
+{
+    ::boost::shared_ptr<BitmapEx> pResult;
+
+    const ResolutionReducedReplacement* pData (
+        dynamic_cast<const ResolutionReducedReplacement*>(&rBitmapData));
+
+    if (pData->mpPreview.get() != NULL)
+    {
+        pResult.reset(new BitmapEx(*pData->mpPreview));
+        if (pData->maOriginalSize.Width() > mnWidth)
+            pResult->Scale(pData->maOriginalSize);
+    }
+
+    return pResult;
+}
+
+
+
+
+bool ResolutionReduction::IsLossless (void) const
+{
+    return false;
+}
+
+
+
+
+//===== PNGCompression ========================================================
+
+
+class PngCompression::PngReplacement : public BitmapReplacement
+{
+public:
+    void* mpData;
+    sal_Int32 mnDataSize;
+    Size maImageSize;
+    PngReplacement (void)
+        : mpData(NULL),
+          mnDataSize(0),
+          maImageSize(0,0)
+    {}
+    virtual ~PngReplacement (void)
+    {
+        delete [] (char*)mpData;
+    }
+    virtual sal_Int32 GetMemorySize (void) const
+    {
+        return mnDataSize;
+    }
+};
+
+
+
+
+::boost::shared_ptr<BitmapReplacement> PngCompression::Compress (
+    const ::boost::shared_ptr<BitmapEx>& rpBitmap) const
+{
+    ::vcl::PNGWriter aWriter (*rpBitmap);
+    SvMemoryStream aStream (32768, 32768);
+    aWriter.Write(aStream);
+
+    PngReplacement* pResult = new PngReplacement();
+    pResult->maImageSize = rpBitmap->GetSizePixel();
+    pResult->mnDataSize = aStream.Tell();
+    pResult->mpData = new char[pResult->mnDataSize];
+    memcpy(pResult->mpData, aStream.GetData(), pResult->mnDataSize);
+
+    return ::boost::shared_ptr<BitmapReplacement>(pResult);
+}
+
+
+
+
+::boost::shared_ptr<BitmapEx> PngCompression::Decompress (
+    const BitmapReplacement& rBitmapData) const
+{
+    BitmapEx* pResult = NULL;
+    const PngReplacement* pData (dynamic_cast<const PngReplacement*>(&rBitmapData));
+    if (pData != NULL)
+    {
+        SvMemoryStream aStream (pData->mpData, pData->mnDataSize, STREAM_READ);
+        ::vcl::PNGReader aReader (aStream);
+        pResult = new BitmapEx(aReader.Read());
+    }
+
+//    sal_Int32 nRatio ((100L * (ULONG)pResult->GetSizeBytes()) / (ULONG)pData->mnDataSize);
+
+    return ::boost::shared_ptr<BitmapEx>(pResult);
+}
+
+
+
+
+bool PngCompression::IsLossless (void) const
+{
+    return true;
+}
+
+
+
+
+} } } // end of namespace ::sd::slidesorter::cache