tdf#153162 Gif load transparency optimization

Converting a bitmap from transparency to alpha can be very slow.
fortunately it can be avoided.
Inverted the transparency colors (cTransIndex1, cNonTransIndex1)
that are used to create aBmp1 in GIFReader::FillImages.
It create the transparency bitmap inverted, so no need to invert it.

Change-Id: I14714fe4b8bbcd7849db57b2824a7077dda40f81
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/165261
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

0 files changed, 0 insertions, 0 deletions