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Introduce libweston-desktop

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libweston-desktop is an abstraction library for compositors wanting to
support desktop-like shells.

The API is designed from xdg_shell features, as it will eventually be
the recommended shell for modern applications to use.
In the future, adding new shell protocols support will be easier, as
limited to libweston-desktop.

The library versioning is the same as libweston. If one of them break
ABI compatibility, the other will too.

The compositor will only ever see toplevel surfaces (“windows”), with
all the other being internal implementation details.
Thus, popups and associated grabs are handled entirely in
libweston-desktop.
Xwayland special surfaces (override-redirect) are special-cased to a
dedicated layer, as the compositor should not know about them.

All the shell error checking is taken care of too, as well as some
specification rules (e.g. sizes constraint for maximized and fullscreen
surfaces).

All the compositor has to do is define a few callbacks in the interface
struct, and manage toplevel surfaces.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Acked-by: Giulio Camuffo <giulio.camuffo@kdab.com>

Differential Revision: https://phabricator.freedesktop.org/D1207
This commit is contained in:
Quentin Glidic
2016-08-12 10:41:34 +02:00
parent 2edc3d5462
commit 248dd10965
14 changed files with 3750 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libweston/compositor.c
+37
View File
@@ -3382,6 +3382,43 @@ weston_surface_get_content_size(struct weston_surface *surface,
rer->surface_get_content_size(surface, width, height);
}
/** Get the bounding box of a surface and its subsurfaces
*
* \param surface The surface to query.
* \return The bounding box relative to the surface origin.
*
*/
WL_EXPORT struct weston_geometry
weston_surface_get_bounding_box(struct weston_surface *surface)
{
pixman_region32_t region;
pixman_box32_t *box;
struct weston_subsurface *subsurface;
pixman_region32_init_rect(&region,
0, 0,
surface->width, surface->height);
wl_list_for_each(subsurface, &surface->subsurface_list, parent_link)
pixman_region32_union_rect(&region, &region,
subsurface->position.x,
subsurface->position.y,
subsurface->surface->width,
subsurface->surface->height);
box = pixman_region32_extents(&region);
struct weston_geometry geometry = {
.x = box->x1,
.y = box->y1,
.width = box->x2 - box->x1,
.height = box->y2 - box->y1,
};
pixman_region32_fini(&region);
return geometry;
}
/** Copy surface contents to system memory.
*
* \param surface The surface to copy from.
libweston/compositor.h
+16
View File
@@ -46,6 +46,19 @@ extern "C" {
#include "zalloc.h"
#include "timeline-object.h"
struct weston_geometry {
int32_t x, y;
int32_t width, height;
};
struct weston_position {
int32_t x, y;
};
struct weston_size {
int32_t width, height;
};
struct weston_transform {
struct weston_matrix matrix;
struct wl_list link;
@@ -1547,6 +1560,9 @@ void
weston_surface_get_content_size(struct weston_surface *surface,
int *width, int *height);
struct weston_geometry
weston_surface_get_bounding_box(struct weston_surface *surface);
int
weston_surface_copy_content(struct weston_surface *surface,
void *target, size_t size,