From: "John V. Baboval" <john.babo...@citrix.com>
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 <john.babo...@citrix.com>
---
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
