wayland: Use scale from core wl_output protocol

The “xdg-output” protocol provides clients with the outputs size and
position in compositor coordinates, and does not provide the output
scale which is already provided by the core “wl_output” protocol.

So when receiving the wl_output scale event, we should update the scale
regardless of “xdg-output” support, otherwise the scale will remain to
its default value of 1 and the surface will be scaled up by the
compositor to match the actual output scale, which causes blurry fonts
and widgets.

Fixes: https://gitlab.gnome.org/GNOME/gtk/issues/1901
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
This commit is contained in:
Olivier Fourdan 2019-05-22 12:11:36 +02:00
parent d0137ef627
commit 713fceb1bd

View File

@ -2357,16 +2357,18 @@ output_handle_scale (void *data,
GDK_NOTE (MISC,
g_message ("handle scale output %d, scale %d", monitor->id, scale));
if (monitor_has_xdg_output (monitor))
return;
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &previous_geometry);
previous_scale = gdk_monitor_get_scale_factor (GDK_MONITOR (monitor));
/* Set the scale from wl_output protocol, regardless of xdg-output support */
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), scale);
if (monitor_has_xdg_output (monitor))
return;
width = previous_geometry.width * previous_scale;
height = previous_geometry.height * previous_scale;
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), scale);
monitor->width = width / scale;
monitor->height = height / scale;