[PATCH] ui/gtk: Properly apply x/y scale when rendering GL area

[Weifeng Liu <weifeng.liu.z@gmail.com>]

On startup, scale_x and scale_y were set to 1 that didn't reflect the
real situation of the scan-out, resulting in incorrect cursor
coordinates to be sent when moving the mouse pointer. Simply updating
the scales before rendering the image fixes this issue.

Cc: hikalium <hikalium@hikalium.com>
Cc: Alexander Orzechowski <orzechowski.alexander@gmail.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Weifeng Liu <weifeng.liu.z@gmail.com>
---
 ui/gtk-gl-area.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 2c9a0db425..01235f876a 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -42,6 +42,7 @@ void gd_gl_area_draw(VirtualConsole *vc)
 #ifdef CONFIG_GBM
     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
 #endif
+    int fbw, fbh;
     int ww, wh, ws, y1, y2;
 
     if (!vc->gfx.gls) {
@@ -53,6 +54,11 @@ void gd_gl_area_draw(VirtualConsole *vc)
     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area) * ws;
     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area) * ws;
 
+    fbw = surface_width(vc->gfx.ds);
+    fbh = surface_height(vc->gfx.ds);
+    vc->gfx.scale_x = (double)ww / fbw / ws;
+    vc->gfx.scale_y = (double)wh / fbh / ws;
+
     if (vc->gfx.scanout_mode) {
         if (!vc->gfx.guest_fb.framebuffer) {
             return;
-- 
2.49.0