Support for disabling partial flips in dfb

Certain boards do not properly support IDirectFBSurface->Flip() with a
partial DFBRegion passed in.

This problem can be worked around by exporting:
QWS_DISPLAY=directfb:nopartialflip

Reviewed-by: Jervey Kong <jervey.kong@nokia.com>

2 files changed, 5 insertions, 2 deletions

diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
index b447967..8f37bcf 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
@@ -1126,6 +1126,8 @@ bool QDirectFBScreen::connect(const QString &displaySpec)
 
     if (displayArgs.contains(QLatin1String("boundingrectflip"), Qt::CaseInsensitive)) {
         d_ptr->directFBFlags |= BoundingRectFlip;
+    } else if (displayArgs.contains(QLatin1String("nopartialflip"), Qt::CaseInsensitive)) {
+        d_ptr->directFBFlags |= NoPartialFlip;
     }
 
 #ifdef QT_DIRECTFB_IMAGECACHE
@@ -1691,7 +1693,7 @@ uchar *QDirectFBScreen::lockSurface(IDirectFBSurface *surface, DFBSurfaceLockFla
 void QDirectFBScreen::flipSurface(IDirectFBSurface *surface, DFBSurfaceFlipFlags flipFlags,
                                   const QRegion &region, const QPoint &offset)
 {
-    if (!(flipFlags & DSFLIP_BLIT)) {
+    if (!(flipFlags & DSFLIP_BLIT) || d_ptr->directFBFlags & NoPartialFlip) {
         surface->Flip(surface, 0, flipFlags);
     } else {
         if (!(d_ptr->directFBFlags & BoundingRectFlip) && region.rectCount() > 1) {
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
index a8c4b43..c483020 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
@@ -144,7 +144,8 @@ public:
         NoFlags = 0x00,
         VideoOnly = 0x01,
         SystemOnly = 0x02,
-        BoundingRectFlip = 0x04
+        BoundingRectFlip = 0x04,
+        NoPartialFlip = 0x08
     };
 
     Q_DECLARE_FLAGS(DirectFBFlags, DirectFBFlag);