diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/howtos/openvg.qdoc | 10 | ||||
| -rw-r--r-- | doc/src/platforms/emb-openvg.qdocinc | 6 |
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 |