wayland/egl: Ensure EGL surface is resized on DRI update_buffers()

Fullscreening and unfullscreening a totem window while playing a video
sometimes results in the video subsurface not changing size along. This
is also reproducible with epiphany.

If a surface gets resized while we have an active back buffer for it, the
resized dimensions won't get neither immediately applied on the resize
callback, nor correctly synchronized on update_buffers(), as the
(now stale) surface size and currently attached buffer size still do match.

There's actually 2 things to synchronize here, first the surface query
size might not be updated yet to the wl_egl_window's (i.e. resize_callback
happened while there is a back buffer), and second the wayland buffers
would need dropping if new surface size differs with the currently attached
buffer. These are done in separate steps now.

https://bugzilla.redhat.com/show_bug.cgi?id=1650929
https://bugs.freedesktop.org/show_bug.cgi?id=109594

Fixes: a9fb331ea7d ("wayland/egl: update surface size on window resize")
Signed-off-by: Carlos Garnacho <carlosg@gnome.org>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Denys Kostin <denys.kostin@globallogic.com>
(cherry picked from commit 30a01cd9232ed83a0259d184b82e050bae219ed3)

1 files changed, 7 insertions, 4 deletions

diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index c3ca1b6f7bc..3025e34ba63 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -637,10 +637,8 @@ update_buffers(struct dri2_egl_surface *dri2_surf)
    struct dri2_egl_display *dri2_dpy =
       dri2_egl_display(dri2_surf->base.Resource.Display);
 
-   if (dri2_surf->base.Width != dri2_surf->wl_win->attached_width ||
-       dri2_surf->base.Height != dri2_surf->wl_win->attached_height) {
-
-      dri2_wl_release_buffers(dri2_surf);
+   if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
+       dri2_surf->base.Height != dri2_surf->wl_win->height) {
 
       dri2_surf->base.Width  = dri2_surf->wl_win->width;
       dri2_surf->base.Height = dri2_surf->wl_win->height;
@@ -648,6 +646,11 @@ update_buffers(struct dri2_egl_surface *dri2_surf)
       dri2_surf->dy = dri2_surf->wl_win->dy;
    }
 
+   if (dri2_surf->base.Width != dri2_surf->wl_win->attached_width ||
+       dri2_surf->base.Height != dri2_surf->wl_win->attached_height) {
+      dri2_wl_release_buffers(dri2_surf);
+   }
+
    if (get_back_bo(dri2_surf) < 0) {
       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
       return -1;