Merge branch '4.6' of scm.dev.nokia.troll.no:qt/qt-s60-public into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/qt-s60-public:
  Implement OpenVG buffer scrolling and enable it on Symbian.

2 files changed, 16 insertions, 0 deletions

diff --git a/doc/src/howtos/openvg.qdoc b/doc/src/howtos/openvg.qdoc
index 9c805bb..f70ed54 100644
--- a/doc/src/howtos/openvg.qdoc
+++ b/doc/src/howtos/openvg.qdoc
@@ -295,6 +295,16 @@
     Convolution, colorize, drop shadow, and blur filters are accelerated
     using OpenVG operations.
 
+    \section2 Scrolling
+
+    By default, accelerated scrolling is not enabled because the impact on
+    performance is very much tied to the hardware platform. To enable
+    accelerated scrolling, you should ensure that QVG_BUFFER_SCROLLING is
+    defined when compiling the QtOpenVG module.
+
+    You should only enable this feature if vgCopyPixels() is known to be
+    efficient on your hardware platform.
+
     \section1 Known issues
 
     Performance of copying the contents of an OpenVG-rendered window to the
diff --git a/doc/src/platforms/emb-openvg.qdocinc b/doc/src/platforms/emb-openvg.qdocinc
index 37ccb9c..2f9cc21 100644
--- a/doc/src/platforms/emb-openvg.qdocinc
+++ b/doc/src/platforms/emb-openvg.qdocinc
@@ -259,6 +259,12 @@ at present.
         \o Convolution, colorize, drop shadow, and blur filters are
 accelerated using OpenVG operations.
 
+    \row
+        \o Scrolling
+        \o Accelerated scrolling is implemented but disabled by default
+unless QVG_BUFFER_SCROLLING is defined. This should only be enabled on
+OpenVG engines where vgCopyPixels() is known to be efficient.
+
 \endtable
 
 \section2 Known issues