YUV dmabufs are not sRGB.
So instead of making the dmabuf builder have sRGB as the default
colorstate, add a NULL default option that makes the builder choose
the colorstate based on fourcc when build() is called.
If that happens, we pick sRGB usually, but for YUV we pick narrow range
BT601, like we did in versions before colorstates.
* We cannot map with offset, because offsets need to be page-size
aligned. And our code doesn't expect an offset anyway.
* The error return value from mmap() is MAP_FAILED aka -1, not NULL aka
0.
Vulkan requires us waiting on the image acquired from
vkAcquireNextImageKHR() before we start rendering to it, as that
function is allowed to return images that are still in use by the
compositor.
Because of that requirement, vkAcquireNextImageKHR() requires a
semaphore or fence to be passed that it can signal once it's done.
We now use a side channel to begin_frame() - calling
set_draw_semaphore() - to pass that semaphore so that the
vkAcquireNextImageKHR() call inside begin_frame() can use it, and then
we can wait on it later when we submit.
And yes, this is insanely convoluted, the Vulkan developers should
totally have thought about GTK's internal designs before coming up
with that idea.
When loading or saving png files, encode the CICP flags of the color
state into the PNG.
When loading, decode the CICP flags if available and detect the
colorstate they use.
If we do not support the cicp tags, we do not load the image.
So far, we ignore the ICC profiles.
Includes regeneration of nodeparse test *reference* output to include
the new tags we write to PNGs.
The original tests do not include those tags, so we implicitly test that
we read untagged files correctly.
We only download the data when we actually need it for writing into the
PNG stream.
This allows modifying the download parameters (in particular color state
in the next commit) while writing out their settings, so the code for
selecting the right colorstate liives in only one place.
We have to be careful though, because the download now happens after the
setjmp(), so we need to make sure the error path handles both cases
without leaking: Where the download has happened and where it hasn't.
Same thing as dmabuf and GL texture builders. Preparation for adding
color state support to texture constructors.
As a bonus, we can now do update regions with memory textures.
... and plumb the color state through the downloading machinery, where
no matter what path it takes it ends up in
gdk_memory_convert_color_state() or gdk_memory_convert().
The 2nd of those has been expanded to optionally do colorstate
conversion when the 2 colorstates are different.
This happens when buffer creation fails in `get_dmabuf_wl_buffer()` and
we manually call `listener->release (data, NULL)`.
Fixes: 2478dd8322 ("subsurface: Split a function")
This is a still experimental protocol (thus the xx prefix).
We are using it go obtain information about the compositors
preferred color state, and pass that on to our rendering machinery.
The currently supported color states are srgb, srgb-linear, rec2100-pq
and rec2100-linear. We don't have any support for ICC profiles.
Unlike other protocols, keep the support code for this protocol
fairly isolated behind wrapper objects, since the protocol is
still subject to change.
begin_frame is the place where we make decisions about the format,
depth and colorstate for our rendering. Make these calls take the
surface color state into account.
In particular, if the surface colorstate is suitable for GL_SRGB,
and we don't need high depth, set things up for that.
The modern incantation to get validation layers enabled is via
VK_INSTANCE_LAYERS=VK_LAYER_KHRONOS_validation
Vulkan has a bunch of environment variables to toggle stuff, let's use
those instead of doing our own.
The settings portal is reporting enums as string values, so
we need to translate this setting back to what we need.
Fixes
(gtk4-demo:18902): GLib-CRITICAL **: 19:06:14.783: g_variant_get_int32: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_INT32)' failed
that could be seen in recent nightly flatpaks.
Previously, we were always downloading into CAIRO_FORMAT_ARGB32.
Now we check the texture depth and pick a suitable format.
This improves rendering for high depth content, but it's slower.
That's why we're not yet making sure the depth is suitable for the
colorspace conversion. That would force all SRGB textures into float
surfaces as we don't consider conversions suitable for U8 in our generic
code.
This shader converts between two color states, by using the
same functions that we use on the cpu. The conversion to perform
is passed as part of the variation.
As premultiplication is part of color states on the shader, we also
encode the premultiplication in the shader.
And because opacity is a useful optimization, we also allow setting
opacity.
For now, the only possible color states are srgb and srgb-linear.
This adds the following:
- ccs argument to GskRenderNode::draw
This is the compositing color state to use when drawing.
- make implementations use the CCS argument
FIXME: Some implementations are missing
- gsk_render_node_draw_with_color_state()
Draws a node with any color state, by switching to its compositing
color state, drawing in that color state and then converting to the
desired color state.
This does draw the result OVER the previous contents in the passed in
color state, so this function should be called with the target being
empty.
- gsk_render_node_draw_ccs()
This needs to be passed a css and then draws with that ccs.
The main use for this is chaining up in rendernode draw()
implementations.
- split out shared Cairo functions into gdkcairoprivate.h
gskrendernode.c and gskrendernodeimpl.c need the same functions.
Plus, there's various code in GDK that wants to use it, so put it in
gdk/ not in gsk/
gsk_render_node_draw() now calls gsk_render_node_draw_with_color_state()
with GDK_COLOR_STATE_SRGB.
Make begin_frame() set a rendering colorstate and depth, and provide it
to the renderers via gdk_draw_context_get_depth() and
gdk_draw_context_get_color_state().
This allows the draw contexts to define their own values, so that ie the
Cairo and GL renderer can choose different settings for rendering (in
particular, GL can choose GL_SRGB and do the srgb conversion; while
Cairo relies on the renderer).
That's basically the "undefined" value. We need that when drawing
nothing, which so far only happens with empty container nodes.
But empty container nodes can be children of other nodes, and that makes
things propagate. So instead of catching them, force the whole rest of
the code to deal with an undefined depth.
We also can't just set a random depth, because that will cause merging
to fail.
