[Qemu-devel] [PATCH 6/7] ui: Add dpy_cursor_enable()

[John Baboval]

From: "John V. Baboval" <address@hidden>

This is an optimization to allow the UI to show/hide the current cursor without
setting it to a new bitmap.

In-guest screen sharing applications which show/hide the cursor when capturing
the screen every frame (GoToMeeting, WebEx, etc.) cause high QEMU CPU usage if
cursor hiding/restoring is implemented as setting a blank cursor and re-setting
the original glyph. In-guest driver APIs typically have enable/disable called
out as a separate operation to provide input for this optimization.

Signed-off-by: John V. Baboval <address@hidden>
---
 include/ui/console.h |    3 +++
 ui/console.c         |   11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index a7171cc..7efa119 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -182,6 +182,8 @@ typedef struct DisplayChangeListenerOps {
                           int x, int y, int on);
     void (*dpy_cursor_define)(DisplayChangeListener *dcl,
                               QEMUCursor *cursor);
+    void (*dpy_cursor_enable)(DisplayChangeListener *dcl,
+                              bool state);
 } DisplayChangeListenerOps;
 
 struct DisplayChangeListener {
@@ -232,6 +234,7 @@ void dpy_text_resize(QemuConsole *con, int w, int h);
 void dpy_mouse_set(QemuConsole *con, int x, int y, int on);
 void dpy_cursor_define(QemuConsole *con, QEMUCursor *cursor);
 bool dpy_cursor_define_supported(QemuConsole *con);
+void dpy_cursor_enable(QemuConsole *con, bool state);
 void dpy_reset(QemuConsole *con);
 
 static inline int surface_stride(DisplaySurface *s)
diff --git a/ui/console.c b/ui/console.c
index 201e602..e9f74c9 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1560,6 +1560,17 @@ bool dpy_cursor_define_supported(QemuConsole *con)
     return false;
 }
 
+void dpy_cursor_enable(QemuConsole *con, bool state)
+{
+    DisplayState *s = con->ds;
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->ops->dpy_cursor_enable) {
+            dcl->ops->dpy_cursor_enable(dcl, state);
+        }
+    }
+}
+
 void dpy_reset(QemuConsole *con)
 {
     DisplayState *s = con->ds;
-- 
1.7.9.5