A client can reliably avoid allocating a second buffer per surface, if
the compositor sends the wl_buffer.release event before the frame
callback. To enable clients' single-buffering, release the wl_buffer
early if possible. Otherwise clients will double-buffer.
Releasing early is not possible, if the backend needs the buffer for
migrating a surface to or from a non-primary weston_plane. In that case,
a new buffer must arrive, before the old can be released. Backends will
indicate this by setting weston_surface:keep_buffer to 1 in
assign_planes().
A proper buffer reference in the backends would be better than the
keep_buffer flag, but that would require a per-surface backend private.
The rpi and DRM backends are updated to set keep_buffer, other backends
do not support planes, so do not have to set it.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
The wl_buffer reference counting API has been inconsistent. You would
manually increment the refcount and register a destroy listener, as
opposed to calling weston_buffer_post_release(), which internally
decremented the refcount, and then removing a list item.
Replace both cases with a single function:
weston_buffer_reference(weston_buffer_reference *ref, wl_buffer *buffer)
Buffer is assigned to ref->buffer, while taking care of all the refcounting
and release posting. You take a reference by passing a non-NULL buffer, and
release a reference by passing NULL as buffer. The function uses an
internal wl_buffer destroy listener, so the pointer gets reset on
destruction automatically.
This is inspired by the pipe_resource_reference() of Mesa, and modified
by krh's suggestion to add struct weston_buffer_reference.
Additionally, when a surface gets destroyed, the associated wl_buffer
will send a release event. Often the buffer is already destroyed on
client side, so the event will be discarded by libwayland-client.
Compositor-drm.c is converted to use weston_buffer_reference.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
The protocol does not require us to flush_damage() on wl_buffer
destruction. In fact, by the time the server receives this request, the
client may have already clobbered the buffer's storage, so we could be
reading undefined data. Instead, just forget about the buffer. The
protocol already says, that a client must not destroy a buffer that is
being read by the server, or the window contents become undefined.
The practical reason for this change is that the following commit can
consolidate wl_buffer destruction listener handlers.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
If a client called wl_surface.attach with the same wl_buffer as
previously, the compositor would mistakenly send a release on that
buffer. This will cause problems only when clients start to properly use
the wl_buffer.release event.
Do not send wl_buffer.release if the same buffer is attached again.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
The implementation of buffer transformation didn't handle transformed
shm buffers properly. The partial texture upload was broken since the
damage is in surface coordinates that don't necessarily match the
buffer's coordinates. It also wouldn't handle the buffer stride
properly, resulting in incorrect rendering if it didn't match the
buffer's width.
The logic used for converting texture coordinates was generalized and
moved out of the renderer, since this conversion may be useful in other
places, such as the backends.
Implement the wl_surface.set_buffer_transform request. This includes
tracking the double-buffered buffer transformation parameter and making
the gl renderer able to handle transformed buffers.
Backends may move surfaces to different planes, in which case damage is
generated in the primary plane. This damage is usually passed to the
renderer, but in some cases the backend may decide to not render
anything (that's the case when drm compositor scans out a client
buffer). In that case the damage on the primary plane would be
discarded, leading to artifacts later.
This patch makes the backend's responsibility to clear the damage on
the primary plane, so that unrendered damage is kept for as long as
necessary.
Move fields current_buffer and buffer_damage out of weston_output into
gl_output_state, since they are actually specific to the renderer.
Also bring back the previous_damage field so that the screenshooter
can get the damage for the previous frame in a renderer independent
way.
This moves the surface color state into gles2-renderer. To do this it
adds two new weston_renderer functions. create_surface to be able to
create per-surface renderer state, and surface_set_color to set the
color of a surface and changes it to a color surface.
When a surface is on a non-primary plane (overlay), we do not need to
keep the GL texture up-to-date, since we are not using it. Avoid calling
glTex(Sub)Image2D in that case, and accumulate the texture damage
separately.
This is especially useful for backends, that can put wl_shm buffers into
overlays.
The empty damage check has to be moved from surface_accumulate_damage()
into gles2_renderer_flush_damage(), because it really needs to check the
accumulated damage, not only the current damage. Otherwise, if a surface
migrates from a plane to the primary plane, and does not have new
damage, the texture would not be updated even for accumulated damage.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Instead of hardcoding drm-backend.so as the default if environment
presents neither Wayland nor X11, have a ./configure option to change
it. It still defaults to drm-backend.so, if not given.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Add the concept of debug key bindings, that are bindings that activate
debug features in the compositor. The bindings are added to a list in
the compositor, but the triggering them is left to the shell.
On the shell side, a global debug key binding is added. When the user
presses mod-shift-space, the shell will invoke the debug bindings based
on the next key press.
This also converts the debug shortcuts for repaint debugging, fan
repaint debugging and the hide overlays shortcut in compositor-drm to
use the new infrastructure.
The following sequence:
wl_surface::attach(s, b, 1, 2)
wl_surface::commit(s)
wl_surface::commit(s)
would actually result in the surface getting moved by (2,4) as the
pending attach delta wasn't reset on commit, only by another attach.
This only shows up on single-buffered surfaces.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Every single frame, we were calling the flush_damage handler in the
renderer. For GLES2 with subimage, this wasn't too bad as we'd never
call glTexSubImage2D, but without it, we'd upload the entire frame
through glTexImage2D every time.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Culling of the repaint of a surface behind an opaque surface on the
same plane was broken by commit 547149a9 [1]. The idea of that commit
is that the damage obscured by an overlay would remain on the primary
plane damage and be repainted when the overlay moved. However, in the
case the two surfaces are on the same plane, the opaque one is not
obscured, so it ends up being repainted.
This commit adds an opaque field to struct weston_plane, that is built
incrementally when accumulating damage. The opaque region of surfaces
on the same plane are removed from the plane's damage, restoring the
previous culling behavior. But since damage behind opaque region of
other planes is maintained, the bug solved in the mentioned commit is
not regressed.
https://bugs.freedesktop.org/show_bug.cgi?id=56537
Partial repaints have been broken since the introduction of the atomic
surface updates. The problem was that surface_commit would set the
geometry dirty flag unconditionally, causing transform updates on every
frame which would in turn cause weston_surface_damage_below() to damage
the whole surface area.
This patch changes this so that flag is only set if the pending buffer
has a different size, the location of the surface changed or the opaque
region changed.
Note that changing the opaque region will cause a full repaint of the
affected surface, because of the transform update.
https://bugs.freedesktop.org/show_bug.cgi?id=56538
When tiling window managers resize a non-resizable window they're violating
ICCCM. Not some hippie-community standard like EWMH, but ICCCM, which is
about as old and sacred as the constitution. If they want to force a window
to be a size it wasn't designed for, at least they could have the decency to
reparent the client window into a bigger containing window of whatever size
they think it should be. But apparently ICCCM compliance is too much to ask.
Anyway, all that just to say that it's really not our fault when we get an
enter event with coordinates outside the valid output region. But we'll
clip it anyway and work around mis-behaving tiling WMs.
Rather than delivering touch events directly to clients, we'll now
call through the touch grab handler. The default handler (in
wayland-server) will deliver these events the same way they worked
before.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
libwayland-server was changed to emit the new drag icon signal instead
of faking an attach event with a NULL buffer so this has to be done on
this side.
event-test assumes, that even without the very first wl_surface.attach
(and commit), the surface will have infinite (previously undef) input
region. event-test simply has test-client to create a wl_surface, and
then it forcefully sets its position and size, and assumes the input
region is now the full surface, so that notify_motion() will hit it.
Change Weston to initialize the input region to infinite, instead of
empty.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Apply wl_surface.frame request only on the next wl_surface.commit
according to the new protocol.
This makes it explicit, which repaint actually triggered the frame
callback, since commit schedules a repaint. Otherwise, something causing
a repaint before a commit could trigger the frame callback too early.
Ensure all demo clients send commit after wl_surface.frame. Note, that
GL apps rely on eglSwapBuffers() sending commit. In toytoolkit, it is
assumed that window_flush() always does a commit.
compositor-wayland assumes renderer->repaint_output does a commit.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
In weston, the wl_resource:data field for a wl_surface object always
contains struct weston_surface *, never struct wl_surface *.
Even though this is just a cosmetic fix, it should reduce confusion.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Make input region double-buffered as specified in the new protocol.
While doing it, get rid of the undef region code, and instead use a
maximum sized real pixman region. This avoids special-casing regions
that might sometimes be undef.
As the input region is now usable by default instead of undef,
weston_surface_update_transform() does not need to reset the input
region anymore.
weston_surface_attach() no longer resets the input region on surface
size change. Therefore, also weston_seat_update_drag_surface() does not
need to reset it.
Update toytoolkit to set input region before calling wl_surface_commit()
or swapBuffers (which does commit).
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Make wl_surface.set_opaque_region double-buffered as required by the new
protocol. Also, do not reset the opaque region on surface size changes
anymore. Only explicit requests from the client will change the region
now.
In clients, make sure commit happens after setting the opaque region.
Mesa does not need a fix, as it never touches the opaque region.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This change depends on the Wayland commit
"protocol: double-buffered state for wl_surface".
Implement double-buffering of damage in the compositor as required by
the new protocol.
Ensure all Weston demo clients call wl_surface_commit() after
wl_surface_damage().
Mesa does not need a fix for this, as the patch adding
wl_surface_commit() call to Mesa already takes care of damage, too;
Mesa commit: "wayland: use wl_surface_commit()"
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This change depends on the Wayland commit
"protocol: double-buffered state for wl_surface".
Clients are now required to issue wl_surface.commit for the
wl_surface.attach to take effect.
While changing this, change the surface argument to
weston_surface_attach() from wl_surface into weston_surface, for
consistency.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Also make all the callers of weston_surface_assign_output() update the
transform instead. This makes sure that when the surface is assigned an
output its bouding box is valid.
This fixes a bug where a newly created surface would have a NULL output
assigned. This would cause weston_surface_schedule_repaint() to not
schedule a repaint, preventing the surface to be shown until something
else caused a repaint.
This is a more generic fix for the issue solved in 4f521731 where
damage obscured by overlays could be lost in one of the output buffers
due to rapid move of a surface in an overlay plane.
This changes the renderer so it keeps track of the damage in each
buffer. Every time a new frame is drawn, the damage of the frame is
added to all the buffers and the rendered regions are cleared from
the current buffer's damage.
Have only one text_model_factory instead of one per seat.
This commit also introduces destruction of an input method when the
corresponding seat is removed.
Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
When accumulating damage in the surfaces into the primary plane damage,
regions obscured by the opaque region would be excluded. This causes a
bug when a redraw of a surface is obscured by an opaque surface on
another plane. The drawing to the former surface is clipped but
its damage is never added to the primary plane and is just lost. Moving
the opaque window later reveals the not-up-to-date content below it.
We can now load any number of general modules, and the shell and xwayland
are just two of them. We continue to use the mechanism for testing but
custom input drivers or logging mechanisms, for example are other use cases.
We rename it flush_damage() as it's the point where we update our rendering
API source (eg, the gles2 texture) according to the accumulated damage,
if necessary.
Pekka Paalanen
Ander Conselvan de Oliveira
Jan Arne Petersen
John Kåre Alsaker
Kristian Høgsberg
Daniel Stone
Matt Roper
Tiago Vignatti
Philipp Brüschweiler