The signal is declared in GtkTestATContext with 0 parameters, but these
handlers were written as if the signal had one `guint` parameter.
On some architectures this accidentally works as intended, but on
others (reproduced on i386 and riscv64) the test tries to use arbitrary
stack contents as the `TestData *` and crashes when it tries to
dereference the resulting non-pointer.
Resolves: https://gitlab.gnome.org/GNOME/gtk/-/issues/6490
Signed-off-by: Simon McVittie <smcv@debian.org>
When the cicp values coming out of GStreamer are unspecified, replace
them with the default cicp values for YUV video: 1/13/6.
We still may end up with unspecified values inside the params, because
GStreamer returns unspecified for primaries/tfs/matrices that aren't
supported by cicp.
See also https://github.com/AOMediaCodec/libavif/wiki/CICP#unspecified
fora similar discussion.
This regression was introduced in aeac2b54.
We need percentage values to stay non-computed, since we otherwise
fail to compute relative font sizes properly. But we want percentages
not to stick around in relative colors, so tweak things to be more
aggressive with simplication when creating relative color values.
Update affected tests.
Fixes: #6868
With the changes in !7473 we now use sampler2D arguments in functions.
However, when there's a function we call with a samplerExternalOES -
which means we need to overload it with that shader variant.
The later CICP changes made the cicp params we were setting unustable.
Set ones that work in the current state of git main. They are still
imperfect, but they reflect the current code.
We were using slightly different numbers here, which isn't good.
The matrices in gdkcolordefs.h are tested in the colorstate-internal
tests, so they are at least properly inverse, and the products match.
It would be better to generate the glsl definitions, somehow.
Add some more texture conversion roundtrips. They are currently
ifdefed out, since they need cicp api.
Also add another test binary for internal tests.
When we the image color state is not a default one, use the cicp
convert op to convert it to the ccs. And when the target color
state is a non-default one, use the shader in the reverse direction.
This shader receives cicp parameters via uniforms, and converts
the texture data from or to the output colorstate. It computes
the matrix in the vertex shader, and then picks the eotf/oetf
according to the cicp parameters in the fragment shader.
This adds machinery to create colorstate objects from cicp
tuples, as well as a function to return a cicp tuple for a
colorstate.
Still missing: a conversion shader for non-default colorstates.
Our conversion machinery supports converting from any color
state to any default color state or back. Direct conversion
between two non-default color states isn't guaranteed. For
converting *to* a cicp color state, we need this function.
