[cairo] Running cairo-test-suite with -as / cairo_surface_set_device_scale() and the test suite / image scaling madness
spitzak at gmail.com
Tue Jul 8 19:06:44 PDT 2014
Use the mouse to scale the picture. Any click in the lower-right
quadrant will cause scale + rotate. Clicks in the other 3 quadrants
You can also hit a lot of letter keys to change the filtering algorithm.
But basically we are testing 'd' (default) and 'b' (best).
On 07/08/2014 06:25 PM, Bryce W. Harrington wrote:
> On Tue, Jun 10, 2014 at 01:46:08PM -0700, Bill Spitzak wrote:
>> Attached is my test program for the filtering. This uses the xlib
>> cairo backend (and thus requires patching cairo so that the fallback
>> image is used for xlib).
>> To build, extract the tar file, cd to the cairot directory, and type
>> make. The test program is ./image.
>> Edit the source code to change the size of the checkerboard pattern.
>> Most tests were done with 1-pixel stripes, by setting CHECKER to 1
>> and YCHECKER to 1000.
> Hi Bill,
> Thanks for providing this test case. I've built and run it, but am not
> sure what I'm looking for... I see a properly drawn checkerboard with
> the defaults, and a set of thin lines with the modified settings. I'm
> assuming I should be seeing some artifacts or corruption?
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