1 files changed, 71 insertions, 0 deletions
diff --git a/vcl/source/bitmap/BitmapSolarizeFilter.cxx b/vcl/source/bitmap/BitmapSolarizeFilter.cxx
new file mode 100644
index 000000000..bfc502fe0
--- /dev/null
+++ b/vcl/source/bitmap/BitmapSolarizeFilter.cxx
@@ -0,0 +1,71 @@
+/* -*- 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/bitmap.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/BitmapSolarizeFilter.hxx>
+
+#include <bitmap/BitmapWriteAccess.hxx>
+
+BitmapEx BitmapSolarizeFilter::execute(BitmapEx const& rBitmapEx) const
+{
+    Bitmap aBitmap(rBitmapEx.GetBitmap());
+    bool bRet = false;
+    BitmapScopedWriteAccess pWriteAcc(aBitmap);
+
+    if (pWriteAcc)
+    {
+        if (pWriteAcc->HasPalette())
+        {
+            const BitmapPalette& rPal = pWriteAcc->GetPalette();
+
+            for (sal_uInt16 i = 0, nCount = rPal.GetEntryCount(); i < nCount; i++)
+            {
+                if (rPal[i].GetLuminance() >= mcSolarGreyThreshold)
+                {
+                    BitmapColor aCol(rPal[i]);
+                    aCol.Invert();
+                    pWriteAcc->SetPaletteColor(i, aCol);
+                }
+            }
+        }
+        else
+        {
+            BitmapColor aCol;
+            const sal_Int32 nWidth = pWriteAcc->Width();
+            const sal_Int32 nHeight = pWriteAcc->Height();
+
+            for (sal_Int32 nY = 0; nY < nHeight; nY++)
+            {
+                Scanline pScanline = pWriteAcc->GetScanline(nY);
+                for (sal_Int32 nX = 0; nX < nWidth; nX++)
+                {
+                    aCol = pWriteAcc->GetPixelFromData(pScanline, nX);
+
+                    if (aCol.GetLuminance() >= mcSolarGreyThreshold)
+                    {
+                        aCol.Invert();
+                        pWriteAcc->SetPixelOnData(pScanline, nX, aCol);
+                    }
+                }
+            }
+        }
+
+        pWriteAcc.reset();
+        bRet = true;
+    }
+
+    if (bRet)
+        return BitmapEx(aBitmap);
+
+    return BitmapEx();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */