[RFC v2 5/5] red-qxl: Add a new parameter to gl_scanout and gl_draw_async

[Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>]

This new parameter (named local_display) can be used by applications
to indicate whether they are dealing with a local or remote client.
This can be useful to ensure that gl_draw or other associated
messages are only sent to local clients.

Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Cc: Dongwon Kim <dongwon.kim@xxxxxxxxx>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
---
 server/red-qxl.cpp | 14 ++++++++++----
 server/spice-qxl.h |  4 ++--
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/server/red-qxl.cpp b/server/red-qxl.cpp
index 48c293ae..14380a60 100644
--- a/server/red-qxl.cpp
+++ b/server/red-qxl.cpp
@@ -426,7 +426,8 @@ void spice_qxl_gl_scanout(QXLInstance *qxl,
                           int fd,
                           uint32_t width, uint32_t height,
                           uint32_t stride, uint32_t format,
-                          int y_0_top)
+                          int y_0_top,
+                          uint32_t local_display)
 {
     RedWorkerMessageGlScanout payload = { /* empty */ };
     spice_return_if_fail(qxl != nullptr);
@@ -452,7 +453,9 @@ void spice_qxl_gl_scanout(QXLInstance *qxl,
     pthread_mutex_unlock(&qxl_state->scanout_mutex);
 
     /* FIXME: find a way to coallesce all pending SCANOUTs */
-    qxl_state->send_message(payload);
+    if (local_display) {
+        qxl_state->send_message(payload);
+    }
     reds_update_client_mouse_allowed(qxl_state->reds);
 }
 
@@ -460,7 +463,8 @@ SPICE_GNUC_VISIBLE
 void spice_qxl_gl_draw_async(QXLInstance *qxl,
                              uint32_t x, uint32_t y,
                              uint32_t w, uint32_t h,
-                             uint64_t cookie)
+                             uint64_t cookie,
+                             uint32_t local_display)
 {
     QXLState *qxl_state;
     RedWorkerMessageGlDraw draw = {
@@ -482,7 +486,9 @@ void spice_qxl_gl_draw_async(QXLInstance *qxl,
     spice_return_if_fail(qxl_state->gl_draw_cookie == GL_DRAW_COOKIE_INVALID);
 
     qxl_state->gl_draw_cookie = cookie;
-    qxl_state->send_message(draw);
+    if (local_display) {
+        qxl_state->send_message(draw);
+    }
 }
 
 void red_qxl_gl_draw_async_complete(QXLInstance *qxl)
diff --git a/server/spice-qxl.h b/server/spice-qxl.h
index bf17476b..2749f1c9 100644
--- a/server/spice-qxl.h
+++ b/server/spice-qxl.h
@@ -87,11 +87,11 @@ void spice_qxl_gl_scanout(QXLInstance *qxl,
                           int fd,
                           uint32_t width, uint32_t height,
                           uint32_t stride, uint32_t format,
-                          int y_0_top);
+                          int y_0_top, uint32_t local_display);
 void spice_qxl_gl_draw_async(QXLInstance *qxl,
                              uint32_t x, uint32_t y,
                              uint32_t w, uint32_t h,
-                             uint64_t cookie);
+                             uint64_t cookie, uint32_t local_display);
 
 /* since spice 0.14.2 */
 
-- 
2.37.2