optimize bit depth conversions to/from Skia where possible

Skia has an optimized function for RGB->RGBA conversion that
we are going to do often because 24bpp is the most common LO
image format. The function is private, so patch that.
Also optimize 32bpp->8bpp conversion with gray palette.

Change-Id: I48b06f80d5ca9e1c8e3ee51da61e87541bd83d5a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91768
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions