1 files changed, 92 insertions, 0 deletions
diff --git a/vcl/source/bitmap/BitmapColorizeFilter.cxx b/vcl/source/bitmap/BitmapColorizeFilter.cxx
new file mode 100644
index 000000000..5f58f6147
--- /dev/null
+++ b/vcl/source/bitmap/BitmapColorizeFilter.cxx
@@ -0,0 +1,92 @@
+/* -*- 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 <tools/color.hxx>
+#include <tools/helpers.hxx>
+
+#include <bitmap/BitmapWriteAccess.hxx>
+#include <bitmap/BitmapColorizeFilter.hxx>
+
+BitmapEx BitmapColorizeFilter::execute(BitmapEx const& rBitmapEx) const
+{
+    Bitmap aBitmap = rBitmapEx.GetBitmap();
+    BitmapScopedWriteAccess pWriteAccess(aBitmap);
+
+    if (!pWriteAccess)
+        return rBitmapEx;
+
+    BitmapColor aBitmapColor;
+    const sal_Int32 nW = pWriteAccess->Width();
+    const sal_Int32 nH = pWriteAccess->Height();
+    std::vector<sal_uInt8> aMapR(256);
+    std::vector<sal_uInt8> aMapG(256);
+    std::vector<sal_uInt8> aMapB(256);
+    sal_Int32 nX;
+    sal_Int32 nY;
+
+    const sal_uInt8 cR = maColor.GetRed();
+    const sal_uInt8 cG = maColor.GetGreen();
+    const sal_uInt8 cB = maColor.GetBlue();
+
+    for (nX = 0; nX < 256; ++nX)
+    {
+        aMapR[nX] = MinMax((nX + cR) / 2, 0, 255);
+        aMapG[nX] = MinMax((nX + cG) / 2, 0, 255);
+        aMapB[nX] = MinMax((nX + cB) / 2, 0, 255);
+    }
+
+    if (pWriteAccess->HasPalette())
+    {
+        for (sal_uInt16 i = 0, nCount = pWriteAccess->GetPaletteEntryCount(); i < nCount; i++)
+        {
+            const BitmapColor& rCol = pWriteAccess->GetPaletteColor(i);
+            aBitmapColor.SetRed(aMapR[rCol.GetRed()]);
+            aBitmapColor.SetGreen(aMapG[rCol.GetGreen()]);
+            aBitmapColor.SetBlue(aMapB[rCol.GetBlue()]);
+            pWriteAccess->SetPaletteColor(i, aBitmapColor);
+        }
+    }
+    else if (pWriteAccess->GetScanlineFormat() == ScanlineFormat::N24BitTcBgr)
+    {
+        for (nY = 0; nY < nH; ++nY)
+        {
+            Scanline pScan = pWriteAccess->GetScanline(nY);
+
+            for (nX = 0; nX < nW; ++nX)
+            {
+                *pScan = aMapB[*pScan];
+                pScan++;
+                *pScan = aMapG[*pScan];
+                pScan++;
+                *pScan = aMapR[*pScan];
+                pScan++;
+            }
+        }
+    }
+    else
+    {
+        for (nY = 0; nY < nH; ++nY)
+        {
+            Scanline pScanline = pWriteAccess->GetScanline(nY);
+            for (nX = 0; nX < nW; ++nX)
+            {
+                aBitmapColor = pWriteAccess->GetPixelFromData(pScanline, nX);
+                aBitmapColor.SetRed(aMapR[aBitmapColor.GetRed()]);
+                aBitmapColor.SetGreen(aMapG[aBitmapColor.GetGreen()]);
+                aBitmapColor.SetBlue(aMapB[aBitmapColor.GetBlue()]);
+                pWriteAccess->SetPixelOnData(pScanline, nX, aBitmapColor);
+            }
+        }
+    }
+
+    return rBitmapEx;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */