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gdkwindow-wayland: Obey Wayland buffer semantics

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We can't destroy buffers if they're in-use by the compositor. Well,
technically we can, but that is considered undefined by Wayland and
mutter won't cope with it very well -- it simply kills the client.

To solve this, we need to delay the destroy operation until the
compositor tells us that it's released the buffer. To do this, hold
an extra ref on the cairo surface as long as the surface is in-use
by the compositor.
This commit is contained in:
Jasper St. Pierre 2014-02-03 18:45:32 -05:00
parent 04b58bcf3e
commit 8061df1544
1 changed files with 13 additions and 8 deletions
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21
gdk/wayland/gdkwindow-wayland.c
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@ -417,7 +417,11 @@ on_frame_clock_after_paint (GdkFrameClock *clock,
data = cairo_surface_get_user_data (impl->cairo_surface,
&gdk_wayland_cairo_key);
data->busy = TRUE;
if (!data->busy)
{
data->busy = TRUE;
cairo_surface_reference (impl->cairo_surface);
}
}
static void
@ -610,7 +614,6 @@ gdk_wayland_cairo_surface_destroy (void *p)
g_free (data);
}
struct wl_shm_pool *
_create_shm_pool (struct wl_shm *shm,
int width,
@ -667,9 +670,11 @@ static void
buffer_release_callback (void *_data,
struct wl_buffer *wl_buffer)
{
GdkWaylandCairoSurfaceData *data = _data;
cairo_surface_t *surface = _data;
GdkWaylandCairoSurfaceData *data = cairo_surface_get_user_data (surface, &gdk_wayland_cairo_key);
data->busy = FALSE;
cairo_surface_destroy (surface);
}
static const struct wl_buffer_listener buffer_listener = {
@ -702,17 +707,17 @@ gdk_wayland_create_cairo_surface (GdkWaylandDisplay *display,
&data->buf_length,
&data->buf);
data->buffer = wl_shm_pool_create_buffer (data->pool, 0,
width*scale, height*scale,
stride*scale, WL_SHM_FORMAT_ARGB8888);
wl_buffer_add_listener (data->buffer, &buffer_listener, data);
surface = cairo_image_surface_create_for_data (data->buf,
CAIRO_FORMAT_ARGB32,
width*scale,
height*scale,
stride*scale);
data->buffer = wl_shm_pool_create_buffer (data->pool, 0,
width*scale, height*scale,
stride*scale, WL_SHM_FORMAT_ARGB8888);
wl_buffer_add_listener (data->buffer, &buffer_listener, surface);
cairo_surface_set_user_data (surface, &gdk_wayland_cairo_key,
data, gdk_wayland_cairo_surface_destroy);