1 files changed, 91 insertions, 0 deletions
diff --git a/vcl/source/bitmap/BitmapInfoAccess.cxx b/vcl/source/bitmap/BitmapInfoAccess.cxx
new file mode 100644
index 0000000000..817d5187c3
--- /dev/null
+++ b/vcl/source/bitmap/BitmapInfoAccess.cxx
@@ -0,0 +1,91 @@
+/* -*- 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 <vcl/BitmapInfoAccess.hxx>
+
+#include <salbmp.hxx>
+#include <svdata.hxx>
+#include <salinst.hxx>
+
+BitmapInfoAccess::BitmapInfoAccess(const AlphaMask& rBitmap, BitmapAccessMode nMode)
+    : BitmapInfoAccess(rBitmap.GetBitmap(), nMode)
+{
+}
+
+BitmapInfoAccess::BitmapInfoAccess(const Bitmap& rBitmap, BitmapAccessMode nMode)
+    : mpBuffer(nullptr)
+    , mnAccessMode(nMode)
+{
+    std::shared_ptr<SalBitmap> xImpBmp = rBitmap.ImplGetSalBitmap();
+
+    if (!xImpBmp)
+        return;
+
+    if (mnAccessMode == BitmapAccessMode::Write)
+    {
+        xImpBmp->DropScaledCache();
+
+        if (xImpBmp.use_count() > 2)
+        {
+            xImpBmp.reset();
+            const_cast<Bitmap&>(rBitmap).ImplMakeUnique();
+            xImpBmp = rBitmap.ImplGetSalBitmap();
+        }
+    }
+
+    mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
+
+    if (!mpBuffer)
+    {
+        std::shared_ptr<SalBitmap> xNewImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap());
+        if (xNewImpBmp->Create(*xImpBmp, rBitmap.getPixelFormat()))
+        {
+            xImpBmp = xNewImpBmp;
+            const_cast<Bitmap&>(rBitmap).ImplSetSalBitmap(xImpBmp);
+            mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
+        }
+    }
+
+    maBitmap = rBitmap;
+}
+
+BitmapInfoAccess::~BitmapInfoAccess()
+{
+    std::shared_ptr<SalBitmap> xImpBmp = maBitmap.ImplGetSalBitmap();
+
+    if (mpBuffer && xImpBmp)
+    {
+        xImpBmp->ReleaseBuffer(mpBuffer, mnAccessMode);
+    }
+}
+
+sal_uInt16 BitmapInfoAccess::GetBestPaletteIndex(const BitmapColor& rBitmapColor) const
+{
+    const BitmapBuffer* pBuffer = mpBuffer;
+
+    return (HasPalette() ? pBuffer->maPalette.GetBestIndex(rBitmapColor) : 0);
+}
+
+sal_uInt16 BitmapInfoAccess::GetMatchingPaletteIndex(const BitmapColor& rBitmapColor) const
+{
+    assert(HasPalette());
+    return mpBuffer->maPalette.GetMatchingIndex(rBitmapColor);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */