gl: fix client mouse mode

Since 2.8, QEMU no longer creates QXL primary surfaces when using GL.
This change broke client-side mouse mode, because Spice server relies on
having a primary surface.

When GL is enabled, use GL scanout informations.
Mouse mode is always client when GL surfaces are used.

This patch and most of the message are based on a patch from
Marc-André Lureau, just moving responsibility from reds to RedQxl.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
Acked-by: Christophe de Dinechin <dinechin@redhat.com>

3 files changed, 23 insertions, 14 deletions

diff --git a/server/red-qxl.c b/server/red-qxl.c
index 7dc13bbd..336bb2e6 100644
--- a/server/red-qxl.c
+++ b/server/red-qxl.c
@@ -841,6 +841,8 @@ void spice_qxl_gl_scanout(QXLInstance *qxl,
     /* FIXME: find a way to coallesce all pending SCANOUTs */
     dispatcher_send_message(qxl_state->dispatcher,
                             RED_WORKER_MESSAGE_GL_SCANOUT, &payload);
+
+    reds_update_client_mouse_allowed(qxl_state->reds);
 }
 
 SPICE_GNUC_VISIBLE
@@ -964,20 +966,29 @@ void red_qxl_clear_pending(QXLState *qxl_state, int pending)
     clear_bit(pending, &qxl_state->pending);
 }
 
-gboolean red_qxl_get_primary_active(QXLInstance *qxl)
+bool red_qxl_get_allow_client_mouse(QXLInstance *qxl, int *x_res, int *y_res, int *allow_now)
 {
-    return qxl->st->primary_active;
-}
+    // try to get resolution when 3D enabled, since qemu did not create QXL primary surface
+    SpiceMsgDisplayGlScanoutUnix *gl;
+    if ((gl = red_qxl_get_gl_scanout(qxl))) {
+        *x_res = gl->width;
+        *y_res = gl->height;
+        *allow_now = TRUE;
+        red_qxl_put_gl_scanout(qxl, gl);
+        return true;
+    }
+
+    // check for 2D
+    if (!qxl->st->primary_active) {
+        return false;
+    }
 
-gboolean red_qxl_get_allow_client_mouse(QXLInstance *qxl, gint *x_res, gint *y_res)
-{
     if (qxl->st->use_hardware_cursor) {
-        if (x_res)
-            *x_res = qxl->st->x_res;
-        if (y_res)
-            *y_res = qxl->st->y_res;
+        *x_res = qxl->st->x_res;
+        *y_res = qxl->st->y_res;
     }
-    return qxl->st->use_hardware_cursor;
+    *allow_now = qxl->st->use_hardware_cursor;
+    return true;
 }
 
 void red_qxl_on_ic_change(QXLInstance *qxl, SpiceImageCompression ic)
diff --git a/server/red-qxl.h b/server/red-qxl.h
index 51ec1456..6014d32a 100644
--- a/server/red-qxl.h
+++ b/server/red-qxl.h
@@ -34,8 +34,7 @@ void red_qxl_stop(QXLInstance *qxl);
 void red_qxl_start(QXLInstance *qxl);
 uint32_t red_qxl_get_ram_size(QXLInstance *qxl);
 gboolean red_qxl_client_monitors_config(QXLInstance *qxl, VDAgentMonitorsConfig *monitors_config);
-gboolean red_qxl_get_primary_active(QXLInstance *qxl);
-gboolean red_qxl_get_allow_client_mouse(QXLInstance *qxl, gint *x_res, gint *y_res);
+bool red_qxl_get_allow_client_mouse(QXLInstance *qxl, int *x_res, int *y_res, int *allow_now);
 SpiceMsgDisplayGlScanoutUnix *red_qxl_get_gl_scanout(QXLInstance *qxl);
 void red_qxl_put_gl_scanout(QXLInstance *qxl, SpiceMsgDisplayGlScanoutUnix *scanout);
 void red_qxl_gl_draw_async_complete(QXLInstance *qxl);
diff --git a/server/reds.c b/server/reds.c
index ddc93352..12c33570 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -4376,8 +4376,7 @@ void reds_update_client_mouse_allowed(RedsState *reds)
 
         allow_now = TRUE;
         FOREACH_QXL_INSTANCE(reds, qxl) {
-            if (red_qxl_get_primary_active(qxl)) {
-                allow_now = red_qxl_get_allow_client_mouse(qxl, &x_res, &y_res);
+            if (red_qxl_get_allow_client_mouse(qxl, &x_res, &y_res, &allow_now)) {
                 break;
             }
         }