Move vertex clipper back to single-precision floating point
intermediates. Since positions are sent down the graphics hardware as
single-precision values, this prevents useless conversions between
single and double precision values and lets compilers fit twice as
much data into vector registers. It also removes a copy by letting the
clipper store vertices directly into the vertex buffer.
This is mostly reverting the conversion to double-precision that
happened along with the switch to the weston_coord struct for vertex
coordinates (commit 10e70bf23c).
Signed-off-by: Loïc Molinari <loic.molinari@gmail.com>
If the source is not supported, we won't receive the capture
information. So the capture info (size/format) will be zeroed, and we
fail while trying to create a buffer for the screenshot with size/format
zeroed.
With this patch we fail if we don't receive the capture info, what makes
the failure reason more explicit.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
This adds three new helpers: one to iterate over all debug scopes
created/added and other two are for simpler getters for the scope name
and the description.
Included with this change is also a simple test to retrieve them.
This is an alternative to using the debug scope list advertised when
using the weston-debug private extension. libweston users can use this
directly to know which scopes they can subscribe to, and there's no need
to have a client implementation for the weston-debug protocol.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
There are some ICC profiles that contain something named VCGT tag. These
are usually power curves (y = x ^ exp) that were loaded in the video
card when the ICC profile was created. So the compositor should mimic
that in order to use the profile.
Weston already has support for that, but our ICC profile tests were
missing this case. This adds such tests.
For testing purposes, we have added tests with different exponents per
color channel.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
Without that we may crash when trying to create a PTYPE_CLUT ICC profile
with dimension zeroed. This would be wrong, so with this change we are
basically validating the test case arguments.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
For now we have some tests with the same name. Differentiate them based
on the ICC profile type that they build: CLUT vs matrix shaper.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
The return values for most of the API functions will be removed and replaced by
asserts. So checking return values will no longer work and passing invalid
arguments will trigger asserts. Modify and remove the tests accordingly.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Move our DRM test fixture setup later, where we already have a bunch of
per-backend splits, so we can choose to skip our tests at the right
time.
Doing this allows us to skip DRM tests with no memory leaks.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Now that we have color profile, transformation and optimizer debug
scopes, make use them in this test.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
We don't accumulate log scopes with was previous set internally so
enable the "log" scope (explicitly) for the xwayland-test to see what
Weston prints out.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
We're still timing out with our basic xwayland test in CI, so this
enables the XWM logging scope, and enables some further print debugs we
have available in our helper library, in an attempt to further
investigate and determine why we're still timing out.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
This adds a test to ensure that the DRM-backend writeback screenshooter
is working properly.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
This patch introduces a small library wrapper around XCB to be used in
Xwayland tests.
It's being designed such that we do not advance without accounting for
all X11 events when changing the window state. It adds a fence that
waits for all events to be processed, and only after all the events have
been accounted for, to proceed further, resuming execution of the
tests.
This works by keeping a tentative_state list for the client and a
window state that gets applied when the event we waited for has been
received.
This is useful in test clients, which could verify at the end after
receiving all events that the correct state has been applied. Acts as a
way to verify that the we never get or have a different state than the
one we expect.
With it, this converts test-xwayland to using libxcb (together with
xcb-cursor-dev) rather than using Xlib, and with it it removes any Xlib
dependency we might have in the tests.
This only adds support for map/unmap/create/destroy/property notify.
A follow-up would be to expand this library to track window movement
and resizing.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
I also snuck in a trivial change to drag_surface_configure at the same
time to avoid yet another micro patch.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Convert the bare x,y coordinates into struct weston_coord and update all
users.
We keep the surface position in wl_fixed_t for now so it still exactly
matches the position most recently sent to clients.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Push weston_coord into the notification functions instead of passing
two doubles.
The touch handlers are passed a pointer to a weston_coord, which is
unusual. This is done so we can pass a NULL pointer instead of a
fabricated invalid coordinate when the touch type is TOUCH_UP.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Wayland protocol can't do this, but the way our test protocol handles
touch through a single event can - ensure that we don't by accident.
This will matter more shortly when we add assert()s to prevent having
coordinates with WL_TOUCH_UP events internally later.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Remove the independent x, y floats from the clipping code and replace them
with struct weston_cord. This includes the polygon8 structure as well.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
We're pushing more and more mutable state into paint nodes, but this state
has a non-zero cost to rebuild every render.
Let's take care to track when we need to rebuild the state.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Update users of the old coordinate space conversion functions that take
x, y pairs to the new weston_coord versions.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
In case we have multiple outputs let's us choose the first output,
rather use the last one, which would happen when multiple are present in
the system.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
In preparation of having multiple outputs available we should be able to
specify by its name. We just use the default one if none was set-up at all.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Now that enum weston_renderer_type is public, there is no need for a
local enum renderer_type in the tests.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Add an output transform function that doesn't use matrices so we can
test our matrix generation by applying it to vectors and comparing with
the non-matrix variant.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Rather than reinventing --use-pixman and --use-gl throughout each
backend, just have a common --renderer=foo argument which can be used to
explicitly specify the renderer.
The old arguments are still handled for backwards compatibility.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Instead of passing --shell=foo-shell.so, just pass --shell=foo, whilst
accepting the old form for compatibility.
Whilst we're at it, document the --shell argument in the manpage and
README.
Signed-off-by: Daniel Stone <daniels@collabora.com>
These shell utils functions are potentially useful to other shells as
well, so make them widely available.
Renamed all functions to weston_shell_utils namespace.
No functional change, copied ad litteram.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
We were storing the output description into the name field, which was
harmless but did cause a leak.
Signed-off-by: Daniel Stone <daniels@collabora.com>
While the --backend parameter looks like it takes a file name, it really
is selected from a list of supported strings that are then funneled
through a translation to enum weston_compositor_backend [1].
Because all backend parameters are of the form "...-backend.so", and
writing "--backend=...-backend.so" is boring, allow the --backend option
to match the backend name without "-backend.so" suffix instead.
For example, this allows to use "--backend=headless" instead of
"--backend=headless-backend.so".
Update help text and documentation. Keep the old way working for
backwards compatibility.
[1] 50dbf38514 ("libweston: use enum to choose the backend")
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Here are more tests for output decorations drawing, this time through
the color-lcms plugin. This is the only practical way to exercise the
input-to-output category of color transformations.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This adds a new test checking that output decorations (used in the
wayland-backend, here tested with headless-backend) are drawn correctly.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Only the 'image' field of struct buffer is ever used here, so just
pass pixman_image_t instead of struct buffer.
This allows a future test to mangle a screenshot (e.g. convert pixel
format) before feeding it in.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Migrate the tst suite to using the new screenshooting protocol. This
ensures the new protocol and implementation work, and removes a user of
the old protocol so that the old protocol can be removed in the future.
Now that the compositor chooses the pixel format,
capture_screenshot_of_output() needs to convert to the expected format
in the tests when necessary.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Instead of starting yet another hand-crafted pixel format mapping table,
use the one we have.
Following patches want to be able to create XRGB8888 buffers, and later
even other formats.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Add tests to validate that weston_matrix_to_transform() works properly
on the matrices generated by weston_surface_build_buffer_matrix() and
weston_output_update_matrix()
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
When we build up a matrix from a series of operations, it's very useful
to know if the combined operations still result in something that matches
a wl_output_transform.
This adds a function to test if a matrix leads to a standard output
transform, and returns the transform if it does.
Tests are provided that check if complex series of operations return
expected results - the weston_matrix_needs_filtering function is tested
at the same time.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
These have been in wayland a while back with version 1.20.0.
We also need to update the test client helper with this bump, as
those bind to version 4.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Spinning up the full desktop-shell is pointless overhead for most tests,
which don't need the full load.
Signed-off-by: Daniel Stone <daniels@collabora.com>
There's no need to spin up the full desktop-shell for the vast majority
of our tests. Rework them to use weston-test-desktop-shell, which is
more lightweight and sensible.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Not a functional change. The replacement of const
dump file to use suffix of appropriate sub tests
(sRGB->sRGB, sRGB->adobeRGB, etc).
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
With commit 'Move libweston-desktop into libweston' we've moved out
libweston-desktop DSO into libweston. Move also the header to
libweston/desktop.
This removes removes the libweston-desktop pc file and bumps libweston
major version to 12.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
This protocol allows clients to create single-pixel RGBA buffers. Now
that we have proper support for these buffers internally within Weston,
we can expose them to clients.
This bumps the build container version, as we now depend on
wayland-protocols v1.26.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Users like desktop-shell want to parse a provided string containing a
combination of environment and arg, e.g.: ENV=stuff /path/to/thing --good
Add support to custom-env for parsing this, with tests, so we can delete
the custom implementation inside desktop-shell.
Signed-off-by: Daniel Stone <daniels@collabora.com>
execve() takes the same form for arguments as environment: an array of
constant pointers to mutable strings, terminated by a NULL.
To make it easier for users who want to build up their own argument
strings to pass to execve, add support for argument arrays to custom_env.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Test the basic stuff: initialising from a known environment, setting a
new variable, overwriting a previous variable, and getting the resulting
array to pass to execve.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Setting up the arguments may consume some of the arguments, e.g. if we
provide a config file or extra modules, then the test harness is
expected to be responsible for freeing those arguments.
Checking the requirements and bailing first means that we never do that,
and thus skipped tests result in leaks. Flip the order so we set up the
args first and skip last, so we can consistently take ownership of all
the provided setup parameters.
Signed-off-by: Daniel Stone <daniels@collabora.com>
ZUC's default mode is to fork for every test case. Unfortunately on
AArch64, fork in an ASan-traced program usually takes around 3.6 entire
seconds. This was leading to the config-parser test timing out.
As none of our remaining ZUC tests even need to fork, just remove all
support for it.
Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is truly horrible.
We want to run ASan with leak checking enabled in CI so we can catch
memory leaks before they're introduced. This works well with Pixman, and
with NIR-only drivers like iris or Panfrost.
But when we run under llvmpipe - which we do under CI - we start failing
because:
- Mesa pulls in llvmpipe via dlopen
- llvmpipe pulls in LLVM itself via DT_NEEDED
- initialising LLVM's global type/etc systems performs thread-local
allocations
- llvmpipe can't free those allocations since the application might
also be using LLVM
- Weston stops using GL and destroys all GL objects, leading to Mesa
unloading llvmpipe like it should
- with everything disappearing from the process's vmap, ASan can no
longer keep track of still-reachable pointers
- tests fail because LLVM is 'leaking'
Usually, an alternative is to LD_PRELOAD a shim which overrides
dlclose() to be a no-op. This is not usable here, because when
$LD_PRELOAD is not empty and ASan is not first in it, ASan immediately
errors out. Prepending ASan doesn't work, because we run our tests
through Meson (which also invokes Ninja), leading to LSan exploding
over CPython and Ninja, which is not what we're interested in.
It would be possible to inject _both_ ASan and a dlclose-does-nothing
shim DSO into the LD_PRELOAD environment for every test, but that seems
even worse, especially as Meson strongly discourages globbing for random
files in the root.
So, here we are, doing what we can: finding where swrast_dri.so (aka
llvmpipe) lives, stashing that in an environment variable, and
deliberately leaking a dlopen handle which we never close to ensure that
neither llvmpipe nor LLVM leave our process's address space before we
exit.
Signed-off-by: Daniel Stone <daniels@collabora.com>
This is adding basically a copy of alpha-blending-test.c. The difference
is that here we use ICC files to set up the output color profile, and
then test light-linear blending only. BLOCK_WIDTH is set to 1 to fit
inside the output size used by the fixture setup, which is smaller than
in the original, but does not change the results.
The test is aimed at testing how color-lcms module succeeds in
linearizing the output of different ICC output profiles. Incorrect
linearization should cause changes in blending results.
The tolerance is taken from the currently achieved error statistics
(1.40908) and rounded up a little to achieve a suitable margin.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Switch from per-channel max error tolerance to max two-norm (Euclidean
distance) error. Geometrically this means that previously the accepted
volume was a +/- tolerance cube around the reference point, and now it
is a sphere with tolerance radius.
The real benefit is simplifying the code.
The error tolerance are also changed to float. Integers cannot represent
values between 1 and 2, and the jump from 1 to 2 would have been too
much. AdobeRGB tolerance gets relaxed a bit, while BT2020 tolerance
becomes stricter. The new tolerance values are the reported achieved
two-norm max errors plus a bit of margin.
Surprisingly the sRGB case tolerances remain strictly at zero, and
that's no bug in the test.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
compare_float() was an ad hoc max error logger with optional debug
logging.
Now that we have rgb_diff_stat, we can get the same statistics and more
with less code. It looks like we would lose the pixel index x, but that
can be recovered from the dump file line number.
This patch takes care to keep the test condition exactly the same as it
was before. The statistics print-out has more details now.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Switch from per-channel max error tolerance to max two-norm (Euclidean
distance) error. Geometrically this means that previously the accepted
volume was a +/- tolerance cube around the reference point, and now it
is a sphere with tolerance radius. This makes the check slightly
stricter.
The real benefit is simplifying the code.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
compare_float() was an ad hoc max error logger with optional debug
logging.
Now that we have rgb_diff_stat, we can get the same statistics and more
with less code. It looks like we would lose the pixel index x, but that
can be recovered from the dump file line number.
This patch takes care to keep the test condition exactly the same as it
was before. The statistics print-out has more details now.
The recorded dump position is the foreground color as that varies while
the background color is constant.
An example Octave function is included to show how to visualize the
rgb_diff_stat dump.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This is a special case of scalar_stat dumps to record all of two-norm
and RGB differences on the same line in the dump file.
This makes the dump file easier to handle when you want full RGB errors
recorded.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
The recently introduced rgb_diff_stat value dumping feature logs the
"position" where the value or error was measured. The reference value
was used as the position, but the problem with the reference value is
that it is an output value and not an input value. Therefore mapping
that back to which input values promoted the error is not easy.
Fix that problem by passing the position explicitly into
rgb_diff_stat_update(), just like it is already passed in to
scalar_stat_update().
Currently the only user simply passes the reference value as position,
because there the input value is also the reference value. This is not
true for future uses of rgb_diff_stat.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
The new field in struct scalar_stat allows recording all tested values
into a file. This is intended to replace ad hoc dumping code like in
alpha-blending-test.c.
To make it easy to set up, also offer a helper to open a writable file
whose name consists of a custom prefix and test name.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Seems it will be common to print all four min/max/avg sets of errors, so
move the printing code into a shared place.
While 0.0-1.0 is the natural range for color values, people are often
accustomed to working with 8-bit or even 10-bit pixel values. An error
of +/- 1 in 8-bit is more intuitive than +/- 0.004 in floating-point.
Hence 'scaling_bits' is added so the caller can determine the value
scaling. This will scale both the reported error numbers, and the
recorded error positions (rgb-tuples), so they are all comparable.
I'm happy to get rid of those two macros as well.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
More tests are going to need this.
The API is changed to work by copy in and copy out to match the other
color_util API. Hopefully this makes the caller code easier to read.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
We treat the argv we pass into the compositor as its to mangle, just as
it is free to do so for POSIX argv. To support this, we stash argv away
and free the saved copy later so as to not leak.
This works perfectly, except when we never call the compositor at all,
and have no saved array to free. Make sure we free the args in this
case, which can be seen as a leak of any generated args when a test
skips on preflight checks, e.g. drm-smoke when not running in CI.
Signed-off-by: Daniel Stone <daniels@collabora.com>
It doesn't need to be using desktop-shell; trying to use it is not
sensible as it will try to bind to all the devices we're repeatedly
creating and destroying, sometimes lose the race, and fail the test
because desktop-shell has died too early.
Signed-off-by: Daniel Stone <daniels@collabora.com>
It's not really useful to have libweston without libweston-desktop. It's
also very little code.
Merging both into the same DSO will allow us to cut out a bunch of
indirection and pain.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Simplify the code by using ready-made helpers.
This also change the loop to draw the image row by row rather than
column by column. Row by row is more natural as it is linear with the
memory layout. No other change in behaviour.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Make use of the shared code instead of open-coding everywhere. This
should make the code easier to read, and reduce the chance of typos if
changes are needed in the future.
No change in behaviour.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
These are the last places in weston-test-client-helper.c where using
image_header_from() will reduce the code line count and simplify the
code a little.
No change in behaviour.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Move the struct image_header and get_image_prop() into a header where we
can share these useful helpers between more test code. While doing that,
drop the unused field 'depth', rename into image_header_from(), and
introduce a helper to get u32 pointer to the beginning of a row. These
helpers should make pixel iterating code easier to read and safer (less
room for mistakes in address computations, and asserts).
Use the shared 'struct image_header' instead of the local one. The
intention is to make the code easier to read by using the same helpers
everywhere.
Width, height and stride use type 'int' because Pixman API uses that
too.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
I will be needing it in a new test, so let's share it.
For convenience, this also adds client back-pointer in struct surface so
that I don't need to pass client explicitly.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
skip() is a left-over from an old test harness design, the comment even
refers to automake. Calling skip() cannot do anything good anymore,
because it wouldn't print the skips in the TAP report, so it would
probably be considered a failure.
Delete this unused and nowadays incorrect function, so it doesn't
confuse people.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Move gen_ramp_rgb() down in the file where the TEST() specific code
begins. This way we first have a big block of fixture setup code which
creates an ICC profile, and the next big block is the actual test client
code. gen_ramp_rgb() belongs with the latter.
This makes the file structure slightly more logical.
This is a pure code move, no changes at all.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This name describes better what this test does. In the future another
TEST() for alpha blending will be added. Both of them will be using
matrix-shaper and cLUT output profiles.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
The new name better matches the contents of the test.
Currently the test creates output ICC profiles with matrix-shaper and
cLUT forms, and tests that basic color conversion from input to output
color space is correct.
The common theme in this test program is to create ICC profiles to be
used as output profiles. In the future this can include more kinds of
testing, e.g. linear blending. OTOH, this test program will always be
limited to SDR because HDR testing probably will not use ICC files.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Added cLUT profile creation to validate linearization algorithm
for DToB3 tag (direction dev to PCS). The 3DLUT is
built by using raw matrix conversion from dev to XYZ and reverse
(XYZ to device).
The test uses floating point pipeline, known as unbounded mode of LCMS.
The details are described in ICCSpecRevision_02_11_06_Float.pdf
The purpose of these new test cases is to keep the GL-renderer 3D LUT
path tested even after color-lcms and GL-renderer start using
specialized matrix-shaper paths.
These also exercise build_eotf_from_clut_profile() in color-lcms, but do
not actually verify it. These cases only test that the recovered EOTF
and its inverse produce an identity mapping together.
BT.2020 is not used in these tests, because the RGB-XYZ conversion
matrix does not stay inside [0.0, 1.0] in either direction, which would
be a problem for the 3D LUT element in the multiProcessingElement
pipelines. Handling that would have been possible, but testing with
AdobeRGB color space should suffice while keeping the test code from
being even more complicated.
roundtrip_verification() tests that we succeed in creating cms
pipelines correctly in both directions so that the resulting ICC file is
better behaved. The Weston test itself only cares about the BToD
direction.
Credits to:
Vladimir Lachine <vladimir.lachine@amd.com>
Graeme Gill <graeme@argyllcms.com>
Co-authored-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
We will want to run the same color spaces with different types of ICC
profiles. To help with that:
1. Let struct lcms_pipeline define the test color space and
transformations and move the tolerance into a new per test case
structure.
2. Added profile type: PTYPE_MATRIX_SHAPER, PTYPE_CLUT.
PTYPE_MATRIX_SHAPER is the previously implemented type.
Co-authored-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This function sets some basic text tags to make an ICC file better
formed.
The code is taken from LittleCMS, https://github.com/mm2/Little-CMS.git
git revision
lcms2.13.1-28-g6ae2e99 (6ae2e99a3535417ca5c95b602eb61fdd29d294d0)
file src/cmsvirt.c.
Suggested-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This adds a new test helper library that depends on LittleCMS 2.
For starters, the library implements conversion from enum transfer_fn to
ICC multiProcessingElements compatible LittleCMS curve object.
That conversion allows encoding transfer funtions in ICC files and
LittleCMS pipelines with full float32 precision instead of forcing a
conversion to a 1D LUT which for power-type curves is surprisingly
imprecise.
This also adds CI tests to make sure the conversion matches our
hand-coded transfer functions.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
These helpers allow collecting color difference statistics easily.
To be used in color-shaper-matrix-test.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
