st/nine: Don't call SetCursor until a cursor is set

The previous code was ignoring the input
until a cursor is set inside d3d
(with SetCursorProperties), as expected
by wine tests.

However it did still make a call to ID3DPresent_SetCursor,
which would result into a SetCursor(NULL) call, thus
hidding any cursor set outside d3d, which we shouldn't do.

Add comment about not avoiding redundant ID3DPresent_SetCursor
calls once a cursor has been set in d3d, as it has been tested to
cause regressions.

Fixes: https://github.com/iXit/Mesa-3D/issues/197
Signed-off-by: Axel Davy <davyaxel0@gmail.com>

diff --git a/src/gallium/state_trackers/nine/device9.c b/src/gallium/state_trackers/nine/device9.c
index b3e56d70b74ca7ba1c9e1505ed9ca28000d2a5b8..04f90ad821095cd836fa2ae282047ed923857e52 100644 (file)
--- a/src/gallium/state_trackers/nine/device9.c
+++ b/src/gallium/state_trackers/nine/device9.c
@@ -810,7 +810,14 @@ NineDevice9_ShowCursor( struct NineDevice9 *This,
 
     DBG("This=%p bShow=%d\n", This, (int) bShow);
 
-    This->cursor.visible = bShow && (This->cursor.hotspot.x != -1);
+    /* No-op until a cursor is set in d3d */
+    if (This->cursor.hotspot.x == -1)
+        return old;
+
+    This->cursor.visible = bShow;
+    /* Note: Don't optimize by avoiding the call if This->cursor.visible
+     * hasn't changed. One has to keep in mind the app may do SetCursor
+     * calls outside d3d, thus such an optimization affects behaviour. */
     if (!This->cursor.software)
         This->cursor.software = ID3DPresent_SetCursor(This->swapchains[0]->present, NULL, NULL, bShow) != D3D_OK;