optimize SkiaSalGraphicsImpl area copying

SkSurface::draw() can avoid copies if it detects the source and
destination are the same surface. This can especially make
a difference on Windows with raster, because RasterWindowContext_win
shares the surface's pixel data with BITMAPINFO, which resets
SkSurface's fWeOwnThePixels, making even makeImageSnapshot()
do copies.
Can be seen in the profile e.g. for tdf#131408.

Change-Id: I08d08974c4725824e05c5644549b920f69b9ce64
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91773
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions