fmin() requires a bump to either _XOPEN_SOURCE_ >= 600 (POSIX 2004) or
c99 - which is a needless dependency for a single simple routine.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Also update the image.arg32 reference images, since for now we're just
accepting pixman's output as truth. This fixes up several tests:
was is
Tests run: 420 420
Passed: 224 261
Failed: 195 159
Expected Failed: 0 0
Error: 0 0
Crashed: 0 0
Untested: 0 0
Total: 420 420
Thanks to psychon for finding the code error in the test.
This adds testcases for the various cairo filter options, each of which
match to corresponding pixman filters. Use the 'downscale' keyword if
invoking tests using cairo-test-suite.
The 24-pixel reference images were produced from quad-color.png using
Gimp's Scale Image command with Interpolation set to None. It is
assumed that all filters should handle a 1:4 scaling cleanly with no
antialiased blurring.
The 95-pixel reference images assume differing types of antialiasing
based on the quality level. We are using the image.argb32 output as
reference here. Potentially some other rendering algorithm could
conceivably provide better results in the future.
The 96-pixel reference images are simply copies of the original
quad-color.png file. It is assumed that 1:1 downscaling operations
should produce no visible change to the original image.
Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
Downscaling from 96 to 24 is easy since it's an even multiple, so try
scaling by -1 pixel too.
This adds a 1:1 scaling test case as well, which should pass through the
image unchanged.
Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
This adds pixman-downscale.c, which tests correctness of PNG images
scaled down using pixman routines.
Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
