1 files changed, 48 insertions, 0 deletions
diff --git a/vcl/source/bitmap/BitmapShadowFilter.cxx b/vcl/source/bitmap/BitmapShadowFilter.cxx
new file mode 100644
index 000000000..3dd48556b
--- /dev/null
+++ b/vcl/source/bitmap/BitmapShadowFilter.cxx
@@ -0,0 +1,48 @@
+/* -*- 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/.
+ *
+ */
+
+#include <vcl/bitmapex.hxx>
+#include <vcl/BitmapColor.hxx>
+#include <vcl/BitmapShadowFilter.hxx>
+
+#include <bitmap/BitmapWriteAccess.hxx>
+
+BitmapEx BitmapShadowFilter::execute(BitmapEx const& rBitmapEx) const
+{
+    BitmapEx aBitmapEx(rBitmapEx);
+    BitmapScopedWriteAccess pWriteAccess(const_cast<Bitmap&>(aBitmapEx.GetBitmap()));
+
+    if (!pWriteAccess)
+        return rBitmapEx;
+
+    for (sal_Int32 y(0); y < sal_Int32(pWriteAccess->Height()); y++)
+    {
+        Scanline pScanline = pWriteAccess->GetScanline(y);
+
+        for (sal_Int32 x(0); x < sal_Int32(pWriteAccess->Width()); x++)
+        {
+            const BitmapColor aColor = pWriteAccess->GetColor(y, x);
+            sal_uInt16 nLuminance(static_cast<sal_uInt16>(aColor.GetLuminance()) + 1);
+            const BitmapColor aDestColor(
+                static_cast<sal_uInt8>(
+                    (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetRed())) >> 8),
+                static_cast<sal_uInt8>(
+                    (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetGreen())) >> 8),
+                static_cast<sal_uInt8>(
+                    (nLuminance * static_cast<sal_uInt16>(maShadowColor.GetBlue())) >> 8));
+
+            pWriteAccess->SetPixelOnData(pScanline, x, aDestColor);
+        }
+    }
+
+    return aBitmapEx;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */