1 files changed, 103 insertions, 0 deletions
diff --git a/vcl/source/graphic/GraphicID.cxx b/vcl/source/graphic/GraphicID.cxx
new file mode 100644
index 000000000..1cad21724
--- /dev/null
+++ b/vcl/source/graphic/GraphicID.cxx
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <graphic/GraphicID.hxx>
+
+#include <impgraph.hxx>
+#include <rtl/strbuf.hxx>
+
+GraphicID::GraphicID(ImpGraphic const& rGraphic)
+{
+    rGraphic.ensureAvailable();
+
+    mnID1 = static_cast<sal_uLong>(rGraphic.ImplGetType()) << 28;
+    mnID2 = mnID3 = mnID4 = 0;
+
+    if (rGraphic.ImplGetType() == GraphicType::Bitmap)
+    {
+        auto const& rVectorGraphicDataPtr = rGraphic.getVectorGraphicData();
+        if (rVectorGraphicDataPtr)
+        {
+            const basegfx::B2DRange& rRange = rVectorGraphicDataPtr->getRange();
+
+            mnID1 |= rVectorGraphicDataPtr->getVectorGraphicDataArrayLength();
+            mnID2 = basegfx::fround(rRange.getWidth());
+            mnID3 = basegfx::fround(rRange.getHeight());
+            mnID4 = vcl_get_checksum(
+                0, rVectorGraphicDataPtr->getVectorGraphicDataArray().getConstArray(),
+                rVectorGraphicDataPtr->getVectorGraphicDataArrayLength());
+        }
+        else if (rGraphic.ImplIsAnimated())
+        {
+            const Animation aAnimation(rGraphic.ImplGetAnimation());
+
+            mnID1 |= (aAnimation.Count() & 0x0fffffff);
+            mnID2 = aAnimation.GetDisplaySizePixel().Width();
+            mnID3 = aAnimation.GetDisplaySizePixel().Height();
+            mnID4 = rGraphic.ImplGetChecksum();
+        }
+        else
+        {
+            const BitmapEx aBmpEx(rGraphic.ImplGetBitmapEx(GraphicConversionParameters()));
+
+            mnID1 |= (((static_cast<sal_uLong>(aBmpEx.GetTransparentType()) << 8)
+                       | (aBmpEx.IsAlpha() ? 1 : 0))
+                      & 0x0fffffff);
+            mnID2 = aBmpEx.GetSizePixel().Width();
+            mnID3 = aBmpEx.GetSizePixel().Height();
+            mnID4 = rGraphic.ImplGetChecksum();
+        }
+    }
+    else if (rGraphic.ImplGetType() == GraphicType::GdiMetafile)
+    {
+        const GDIMetaFile& rMtf = rGraphic.ImplGetGDIMetaFile();
+
+        mnID1 |= (rMtf.GetActionSize() & 0x0fffffff);
+        mnID2 = rMtf.GetPrefSize().Width();
+        mnID3 = rMtf.GetPrefSize().Height();
+        mnID4 = rGraphic.ImplGetChecksum();
+    }
+}
+
+OString GraphicID::getIDString() const
+{
+    static const char aHexData[]
+        = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+
+    sal_Int32 nShift, nIndex = 0;
+    sal_Int32 nLen = 24 + (2 * BITMAP_CHECKSUM_SIZE);
+    OStringBuffer aHexStr(nLen);
+    aHexStr.setLength(nLen);
+
+    for (nShift = 28; nShift >= 0; nShift -= 4)
+        aHexStr[nIndex++] = aHexData[(mnID1 >> static_cast<sal_uInt32>(nShift)) & 0xf];
+
+    for (nShift = 28; nShift >= 0; nShift -= 4)
+        aHexStr[nIndex++] = aHexData[(mnID2 >> static_cast<sal_uInt32>(nShift)) & 0xf];
+
+    for (nShift = 28; nShift >= 0; nShift -= 4)
+        aHexStr[nIndex++] = aHexData[(mnID3 >> static_cast<sal_uInt32>(nShift)) & 0xf];
+
+    for (nShift = (8 * BITMAP_CHECKSUM_SIZE) - 4; nShift >= 0; nShift -= 4)
+        aHexStr[nIndex++] = aHexData[(mnID4 >> static_cast<sal_uInt32>(nShift)) & 0xf];
+
+    return aHexStr.makeStringAndClear();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */