Previously renderers were not told when the output (framebuffer they
need to draw) size changed. Renderers just pulled that information out
from weston_output::current_mode when they happened to need it. This
makes some things awkward, like resizing the shadow or intermediate
buffers. In fact, Pixman-renderer does not even support resizing its
shadow buffer, nor does GL-renderer. DRM-backend has to destroy and
re-create the renderer output state anyway, but rdp, x11 and wayland
backends would be natural users of resizing API.
This commit adds an API for resizing with empty implementations. Actual
implementations will be added in following patches for each renderer
while moving parts of resizing code from backends into the renderers.
No-op renderer needs no implementation.
Only wayland-backend has actual resizing code already, and that is made
to call the new API. Unfortunately, Pixman and GL renderers differ: one
does not blit them while the other does. In order to assert the
functionality of each renderer to keep the API consistent,
wayland-backend needs to lie to pixman-renderer. That's not new, it
already does so in wayland_output_get_shm_buffer() where the 'pm_image'
addresses only the interior area instead of the whole buffer.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Everywhere we are standardising to drm_fourcc.h pixel format codes, and
using struct pixel_format_info as a general handle that allows us to
access the equivalent format in various APIs. In the name of
standardisation, convert weston_compositor::read_format to
pixel_format_info.
Pixman formats are defined CPU-endian, while DRM formats are defined
always little-endian. OpenGL has various definitions. Correctly mapping
between these when the CPU is big-endian is an extra chore we can
hopefully offload to pixel-formats.c.
GL-renderer read_format is still defined based on Pixman format, because
of the pecualiar way OpenGL defines a pixel format with
GL_UNSIGNED_BYTE. That matches the same Pixman format on big-endian but
not the same drm_fourcc.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
noop-renderer needs to actually access the buffer content, to ensure
that the bad-buffer test works. This was previously done using a
volatile variable, but clang rightly pointed out that the variable
access had no effect (since the volatile stack variable was never read
from, and the source is not volatile), so 9b0b5b57dd changed it to be
explicitly marked it as unused to suppress the compiler warning.
Unfortunately suppressing the warning still leaves the compiler free to
optimise out the access.
Replace the variable decorations with actually using the result of the
read, so we can be really sure that it's never going to be optimised
away.
Signed-off-by: Daniel Stone <daniels@collabora.com>
ca9bb01fe6 made it so that we already set shm_buffer, width, height,
etc, in the core. There's no need for the renderer to do this.
Signed-off-by: Daniel Stone <daniels@collabora.com>
clang-13 complains about bitwise xor assigments like the following:
../libweston/noop-renderer.c:62:25: warning: variable 'unused' set but
not used [-Wunused-but-set-variable] volatile unsigned char unused = 0;
Use the __attribute__((unused)) instead.
Suggested-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Refactor the buffer-type check slightly so we can handle solid-color
buffers, which we do exactly nothing with.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Rather than calling accessors (wl_shm_buffer_get etc) to figure out
which type our buffer is, just look in the structure.
Signed-off-by: Daniel Stone <daniels@collabora.com>
We already have the buffer in the caller, and every no-op implementation
will want to access the buffer. So might as well pass it.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Fixes missing prototypes compilation warnings emitted when a function
is defined before its prototype is declared.
These warnings were introduced over time since the switch to meson
because the -Wmissing-protoypes was not included in the compilation
arguments.
Signed-off-by: Guillaume Champagne <champagne.guillaume.c@gmail.com>
This ensures that all function pointers we do not fill in will be NULL.
I had a crash in the Xwayland test with
https://gitlab.freedesktop.org/wayland/weston/merge_requests/274 without this,
because import_dmabuf was garbage.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
The main idea is to make libweston users use the form
#include <libweston/libweston.h>
instead of the plain
#include <compositor.h>
which is prone to name conflicts. This is reflected both in the installed
files, and the internal header search paths so that Weston would use the exact
same form as an external project using libweston would.
The public headers are moved under a new top-level directory include/ to make
them clearly stand out as special (public API).
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This clarifies what is supposed to be the libweston code.
v2: screen-share.c is already in compositor/ instead.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Tested-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Tested-by: Benoit Gschwind <gschwind@gnu-log.net>
Acked-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: rebased]
