Images are converted to ARGB32 format, then each byte (ie: each pixel
channel) in the read image is allowed to deviate by some specified
amount from the corresponding byte in the expected image, to allow for
rounding errors etc.
By default, no deviation is permitted, but the XCF tests are allowed a
deviation of 1, as the alpha blending can result in rounding errors
(depending on whether hardware acceleration is used, for example). In
the end, we are not too concerned about a small deviation that is
invisible to the human eye.
REVIEW: 116567
This both excludes the autotests and tests subdirs if the user sets
BUILD_TESTING off, and makes sure we do not run tests for formats that
were not built due to dependencies not being found.
REVIEW: 115504
The plugin export mechanism has been patched up (including the addition
of the JSON file), and the FindWebP.cmake file is new.
Writing is currently disabled, as it produces broken images.
Autotests are generated using the cwebp and dwebp utilities distributed
with the libwebp reference library.
REVIEW: 115355
It appears to be some internal format of xview, although I cannot find
any mention of such a thing on the internet. There does not appear to
be any sort of mime type to associate with this file format, either.
Therefore, I think it is reasonable to declare it obsolete.
REVIEW: 115768
Possibly unsurprisingly, the dark art of using GhostScript to render a
subset of PostScript is not entirely stable across versions of that
tool. Additionally, we cannot even guarantee that GhostScript will be
available machines that run the tests.
EPS writing can be done either by pdftops from Poppler, or by
GhostScript. These two tools produce very different output, so the
simple write test will always fail on some systems (currently ones
without poppler).
Two main tests: read the file and compare to a given image (loaded from
png), and write a file out and compare to a previously-written image.
The write test in particular is kind of fragile, but it should help
catch some errors where a code change was not intended to affect the
output of the plugin.
Tests are included for all the writable formats, as well as every
readable format that GIMP can write to (and so I could easily get an
example of).
REVIEW: 115430
