pixman: Use maximum precision for pixman-bits-image, v2.
pixman-bits-image's wide helpers first obtains the 8-bits image,
then converts it to float. This destroys all the precision that
the wide path was offering.
Fix this by making get_pixel() take a pointer instead of returning
a value. Floating point will fill in a argb_t, while the 8-bits path
will fill a 32-bits ARGB value. This also requires writing a floating
point bilinear interpolator. With this change pixman can use the full
floating point precision internally in all paths.
Changes since v1:
- Make accum and reduce an argument to convolution functions,
to remove duplication.
Signed-off-by: Maarten Lankhorst <email@example.com>
Acked-by: Basile Clement <firstname.lastname@example.org>
2 files changed