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egl/wayland: Don't invalidate buffers on no-op resize

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The Wayland platform's resize_callback is invoked from libwayland-egl
when wl_egl_window_resize() is called. The resize call is the only place
for the application to insert dx/dy arguments to wl_surface_attach().

When modifying the cursor hotspot (as in wayland/wayland#148), we want
to set dx/dy, but leave the surface size the same. If we get
wl_egl_window_resize() with the same width and height argument as we
already have, we do not need to invalidate our existing drawable.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4030>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4030>
This commit is contained in:
Daniel Stone 2020-03-03 10:52:32 +00:00
parent 311c82e192
commit e5b01183a6
1 changed files with 4 additions and 0 deletions
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4
src/egl/drivers/dri2/platform_wayland.c
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@ -266,6 +266,10 @@ resize_callback(struct wl_egl_window *wl_win, void *data)
struct dri2_egl_display *dri2_dpy =
dri2_egl_display(dri2_surf->base.Resource.Display);
if (dri2_surf->base.Width == wl_win->width &&
dri2_surf->base.Height == wl_win->height)
return;
/* Update the surface size as soon as native window is resized; from user
* pov, this makes the effect that resize is done immediately after native
* window resize, without requiring to wait until the first draw.