commit b2ca39bc5e424e67e8fc7e8a044214feb09e39f7
author Patrick Luby <plubius@neooffice.org> Fri Oct 06 15:21:50 2023 -0400
committer Patrick Luby <plubius@neooffice.org> Fri Oct 06 22:31:00 2023 +0200
tree 531c1945eec20a2839fc712b160b77ca01edaf7a
parent c76fb134281a3d1fd56f8a6d07ad7111c85e17b9

tdf#157576 and tdf#157635 mask out black pixels

Due to the switch from transparency to alpha in commit
81994cb2b8b32453a92bcb011830fcb884f22ff3, mask out black
pixels in bitmap.

Change-Id: I7cc8c39c20d8ec4fed026c3e27fce24396815d68
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/157665
Tested-by: Jenkins
Reviewed-by: Patrick Luby <plubius@neooffice.org>

vcl/source/filter/igif/gifread.cxx

diff --git a/vcl/source/filter/igif/gifread.cxx b/vcl/source/filter/igif/gifread.cxx
index 818317f..afbf084 100644
--- a/vcl/source/filter/igif/gifread.cxx
+++ b/vcl/source/filter/igif/gifread.cxx
@@ -666,7 +666,13 @@ void GIFReader::CreateNewBitmaps()
        aAnimationFrame.maBitmapEx = BitmapEx( aBmp8, aAlphaMask );
    }
    else
        aAnimationFrame.maBitmapEx = BitmapEx( aBmp8 );
    {
        // tdf#157576 and tdf#157635 mask out black pixels
        // Due to the switch from transparency to alpha in commit
        // 81994cb2b8b32453a92bcb011830fcb884f22ff3, mask out black
        // pixels in bitmap.
        aAnimationFrame.maBitmapEx = BitmapEx( aBmp8, aBmp8 );
    }

    aAnimationFrame.maPositionPixel = Point( nImagePosX, nImagePosY );
    aAnimationFrame.maSizePixel = Size( nImageWidth, nImageHeight );