[Qemu-devel] [PATCH] ui/vnc: optimize full scanline updates

[Peter Lieven <pl@kamp.de>]

in case we send and update for a complete scanline increment
the y offset to avoid running to find_next_bit for that lines
twice.

Signed-off-by: Peter Lieven <pl@kamp.de>
---
 ui/vnc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ui/vnc.c b/ui/vnc.c
index a742c90..6fa2ee7 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -1115,6 +1115,12 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
                 n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y,
                                       (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h);
             }
+            if (!x && x2 == width / VNC_DIRTY_PIXELS_PER_BIT) {
+                y += h;
+                if (y == height) {
+                    break;
+                }
+            }
         }
 
         vnc_job_push(job);
-- 
1.9.1