Get currently bound GL context when creating new GL context and restore
it after the creation for consistency with behavior expected by virglrenderer
that assumes context-creation doesn't switch context.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 ui/gtk-gl-area.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index c709b2ce0f63..ce49000d3f17 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -250,11 +250,13 @@ QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
                                         QEMUGLParams *params)
 {
     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
+    GdkGLContext *ctx, *current_ctx;
     GdkWindow *window;
-    GdkGLContext *ctx;
     GError *err = NULL;
     int major, minor;
 
+    current_ctx = gdk_gl_context_get_current();
+
     window = gtk_widget_get_window(vc->gfx.drawing_area);
     ctx = gdk_window_create_gl_context(window, &err);
     if (err) {
@@ -275,8 +277,12 @@ QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
 
     gdk_gl_context_make_current(ctx);
     gdk_gl_context_get_version(ctx, &major, &minor);
-    gdk_gl_context_clear_current();
-    gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
+
+    if (current_ctx) {
+        gdk_gl_context_make_current(current_ctx);
+    } else {
+        gdk_gl_context_clear_current();
+    }
 
     if (gd_cmp_gl_context_version(major, minor, params) == -1) {
         /* created ctx version < requested version */
-- 
2.52.0