[PATCH v20 02/21] ui/gtk: Restore original context after new context creation

[Dmitry Osipenko <dmitry.osipenko@collabora.com>]

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.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 ui/gtk-egl.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 0dbb429958e5..be769bcbfbb1 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -218,10 +218,17 @@ QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
                                     QEMUGLParams *params)
 {
     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
+    QEMUGLContext ctx, current_context = eglGetCurrentContext();
 
     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
                    vc->gfx.esurface, vc->gfx.ectx);
-    return qemu_egl_create_context(dgc, params);
+
+    ctx = qemu_egl_create_context(dgc, params);
+
+    eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                   current_context);
+
+    return ctx;
 }
 
 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
-- 
2.52.0