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gdk/wayland: cope with the compositor implementing an older protocol than us

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If we bind to a global with an higher version than implemented, or
we make requests that appeared in a later version, we would get
fatal wayland errors.

https://bugzilla.gnome.org/show_bug.cgi?id=704104
This commit is contained in:
Giovanni Campagna 2013-07-12 16:49:52 +02:00
parent aca3df3000
commit 047d60e797
3 changed files with 19 additions and 4 deletions
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7
gdk/wayland/gdkdisplay-wayland.c
View File

@ -156,7 +156,8 @@ gdk_registry_handle_global(void *data, struct wl_registry *registry, uint32_t id
if (strcmp(interface, "wl_compositor") == 0) {
display_wayland->compositor =
wl_registry_bind(display_wayland->wl_registry, id, &wl_compositor_interface, 3);
wl_registry_bind(display_wayland->wl_registry, id, &wl_compositor_interface, MIN (version, 3));
display_wayland->compositor_version = MIN (version, 3);
} else if (strcmp(interface, "wl_shm") == 0) {
display_wayland->shm =
wl_registry_bind(display_wayland->wl_registry, id, &wl_shm_interface, 1);
@ -168,8 +169,8 @@ gdk_registry_handle_global(void *data, struct wl_registry *registry, uint32_t id
wl_registry_bind(display_wayland->wl_registry, id, &wl_shell_interface, 1);
} else if (strcmp(interface, "wl_output") == 0) {
output =
wl_registry_bind(display_wayland->wl_registry, id, &wl_output_interface, 2);
_gdk_wayland_screen_add_output(display_wayland->screen, id, output, version);
wl_registry_bind(display_wayland->wl_registry, id, &wl_output_interface, MIN (version, 2));
_gdk_wayland_screen_add_output(display_wayland->screen, id, output, MIN (version, 2));
/* We need another roundtrip to receive the modes and geometry
* events for the output, which gives us the physical properties
* and available modes on the output. */

1
gdk/wayland/gdkdisplay-wayland.h
View File

@ -67,6 +67,7 @@ struct _GdkWaylandDisplay
GSource *event_source;
int init_ref_count;
int compositor_version;
struct xkb_context *xkb_context;
};

15
gdk/wayland/gdkwindow-wayland.c
View File

@ -37,6 +37,7 @@
#include <sys/mman.h>
#include <errno.h>
#define WL_SURFACE_HAS_BUFFER_SCALE 3
#define WINDOW_IS_TOPLEVEL_OR_FOREIGN(window) \
(GDK_WINDOW_TYPE (window) != GDK_WINDOW_CHILD && \
@ -433,6 +434,13 @@ window_update_scale (GdkWindow *window)
guint32 scale;
GSList *l;
if (wayland_display->compositor_version < WL_SURFACE_HAS_BUFFER_SCALE)
{
/* We can't set the scale on this surface */
impl->scale = 1;
return;
}
scale = 1;
for (l = impl->outputs; l != NULL; l = l->next)
{
@ -538,6 +546,7 @@ _gdk_wayland_display_create_window_impl (GdkDisplay *display,
static void
gdk_wayland_window_attach_image (GdkWindow *window)
{
GdkWaylandDisplay *display;
GdkWindowImplWayland *impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
GdkWaylandCairoSurfaceData *data;
int32_t server_width, server_height, dx, dy;
@ -584,7 +593,11 @@ gdk_wayland_window_attach_image (GdkWindow *window)
/* Attach this new buffer to the surface */
wl_surface_attach (impl->surface, data->buffer, dx, dy);
wl_surface_set_buffer_scale (impl->surface, data->scale);
/* Only set the buffer scale if supported by the compositor */
display = GDK_WAYLAND_DISPLAY (gdk_window_get_display (window));
if (display->compositor_version >= WL_SURFACE_HAS_BUFFER_SCALE)
wl_surface_set_buffer_scale (impl->surface, data->scale);
impl->pending_commit = TRUE;
}