VML import: handle <v:imagedata gain="..." blacklevel="...">

Map it to (the UNO API of) GraphicDrawMode::Watermark, similar to what
the binary import does in SvxMSDffManager::ImportGraphic() and how the
drawingML import does it in
oox::drawingml::GraphicProperties::pushToPropMap().

On export, the drawingML export is used, and that already maps
GraphicDrawMode::Watermark to <a:lum bright="70000" contrast="-70000">.

Change-Id: I33986a03bf3d3863da5c5b1f0a2e0da0fa595c9e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126908
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions