Implemented an option to tune flipping

export QWS_DISPLAY=directfb:boundingrectflip to enable calling Flip on
the bounding rect of the dirtied area rather than each dirty rectangle.
This could be faster if you update many small rectangles.

Reviewed-by: TrustMe

1 files changed, 4 insertions, 0 deletions

diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
index f8aaa5f..c1b75c5 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
@@ -896,6 +896,10 @@ bool QDirectFBScreen::connect(const QString &displaySpec)
         }
     }
 
+    if (displayArgs.contains(QLatin1String("boundingrectflip"), Qt::CaseInsensitive)) {
+        d_ptr->directFBFlags |= BoundingRectFlip;
+    }
+
     if (displayArgs.contains(QLatin1String("ignoresystemclip"), Qt::CaseInsensitive))
         d_ptr->directFBFlags |= IgnoreSystemClip;