ui/gtk: Don't update scale in fixed scale mode in gtk-egl.c

Scale shouldn't be changed until user explicitly requests it in fixed
scale mode (full-screen=false and free-scale=false). Use function
gd_update_scale to complete scale updating instead.

Signed-off-by: Weifeng Liu <weifeng.liu.z@gmail.com>
Message-ID: <20250511073337.876650-7-weifeng.liu.z@gmail.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 947c993..f8e4f4b 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -95,8 +95,9 @@
 #endif
         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
 
-        vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
-        vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
+        gd_update_scale(vc, ww, wh,
+                        surface_width(vc->gfx.ds),
+                        surface_height(vc->gfx.ds));
 
         glFlush();
 #ifdef CONFIG_GBM
@@ -122,8 +123,9 @@
 
         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 
-        vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
-        vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
+        gd_update_scale(vc, ww, wh,
+                        surface_width(vc->gfx.ds),
+                        surface_height(vc->gfx.ds));
 
         glFlush();
     }