Even after commit e46be417ce alphamap
test is still leaking the alphamap pixmap, leading to mmap() failures
on cygwin
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
The images are being created with non-NULL data, so we have to free it
outselves. This is important because the Cygwin tinderbox is running
out of memory and produces this:
mmap failed on 20000 1507328
mmap failed on 40000 1507328
mmap failed on 20000 1507328
mmap failed on 40000 1507328
mmap failed on 40000 1507328
mmap failed on 40000 1507328
http://tinderbox.x.org/builds/2010-10-05-0014/logs/pixman/#check
- Test many more combinations of formats
- Test destination alpha maps
- Test various different alpha origins
Also add a transformation to the destination, but comment it out
because it is actually broken at the moment (and pretty difficult to
fix).
This program demonstrates three bugs relating to alpha maps:
- When fetching from an alpha map into 32 bit intermediates, we use
the fetcher from the image, and not the one from the alpha map.
- For 64 bit intermediates we call fetch_pixel_generic_lossy_32()
which then calls fetch_pixel_raw_64, which is NULL because alpha
images are never validated.
- The alpha map should be used *in place* of any existing alpha
channel, but we are actually multiplying it onto the image.
