simple-shm: honour wl_buffer.release

Change simple-shm to properly process the wl_buffer.release event, and
not reuse a buffer until it is released by the server, as specified in
the protocol.

In case the server has not released the buffer, but signals that it has
been shown (frame callback), allocate a second buffer. Simple-shm will
now automatically do double-buffering if needed.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: make window_{create,set}_surface private

I do not think these are meant to be called by the applications
directly. Applications certainly do not have to call them.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: make window_flush() private

Not called from any client.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: remove unused MULT macro

Leftovers from

commit f02a649a3ce5735f5a20103fe6f1002b3a421501
Author: Kristian Høgsberg <krh@bitplanet.net>
Date:   Mon Mar 12 01:05:25 2012 -0400

    Consolidate image loading code and move to shared/

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: merge struct surface_data into shm_surface_data

Struct surface_data was not really useful, and it definitely was not
used with EGL-based windows.

This also fixes a semantic mistake, where struct shm_surface_data was
put into cairo_surface_t private, but got out as struct surface_data
instead. Due to struct layout, however, this did not cause a real bug.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: use different keys for different cairo privates

cairo_surface_t objects have a private set, either struct
shm_surface_data, or struct egl_window_surface_data. Use separate
private keys for each type to avoid mismatch.

This makes display_get_buffer_for_surface() safe, in that it won't
return garbage for an EGL-based cairo surface.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
window: make display_create_surface() shm-only

Nothing uses it to create EGL-surfaces outside of window.c. This makes
refactoring the EGL-based code easier, since we do not need to support
EGL-based Cairo surfaces without an associated struct window.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
simple-egl: Reset opaque region if not fullscreen.

If simple-egl is toggled fullscreen, the opqaue region is set for the surface
but never removed after exiting fullscreen. This patch resets the opaque region
to 0 if the surface is not fullscreen and -o was not passed. This fixes the
problem introduced sometime since d7f282b84e, when this was last fixed.
zoom: Don't update the zoom translation if zoom level is 0

On the first frame with zoom activated, the spring used for animation
will have a current value of zero. The translation calculated with that
value will be invalid (not a number). Using this value later leads to
having an invalid output matrix, so nothing is composited in the first
zoomed frame.

This problem is most evident when a sprite plane is being used. In that
case, enabling the zoom will cause the surface to be moved back to the
primary plane, but because of the bug described above, this surface
would not actually be rendered causing a quick flicker.
compositor-drm: Add a debug binding for toggling usage of hw cursors
compositor-drm: Add debug binding for toggling sprites

While at it, consolidate all the bindings we already have into one
single function.
compositor: Move clearing of primary plane damage to the backends

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.
gl, rpi: consolidate print_egl_error_state()

Rename print_egl_error_state() to gl_renderer_print_egl_error_state()
and exports it.

Remove the copy of that function from the rpi backend, and call
the exported function instead.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
man: add weston-drm page

Add some documentation about the DRM backend into its own man page, and
refer to it in weston(1).

Environment variable, that are reserved for backends, and currently used
only by the DRM backend, are moved to weston-drm page.

NOTE: This is a candidate for the stable branch
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
man: fill missing pieces to weston page

Config file, WAYLAND_SOCKET, XDG_CONFIG_HOME, segfault handler.

NOTE: This is a candidate for the stable branch
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
compositor: Implement buffer transformation

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.
compositor-drm: Support scan out of transformed buffers

If a client renders its buffers with the same transform as the output,
we can scan out them when fullscreen.
clients: Add a client that renders transformed buffers

This new client, called transformed, renders a cross with the top part
red and the right green, with the same transform as the output the
surface is in.

This is based on simple-egl.
text: Start input method from configuration

Start the input method specified in the weston.ini configuration file.

Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
text: Rename and extend text_model key event

Rename the key event in text_model to keysym and add serial, time and
modifiers arguments. Add a modifiers_map event to transfer an array of
0-terminated modifier names, so that a mapping of modifiers to the
modifier bit mask is possible.

Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>