diff options
| author | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2012-02-20 10:30:07 +0100 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-03-06 08:24:22 +0100 |
| commit | e6f84312a5352c742f240385e2814ef9b865db22 (patch) | |
| tree | 2167c4410cd692553a92aa9d1bbf9effb48005a3 /src/gui/painting | |
| parent | 4a80a7ced1f643a6794f6550d01c1fe60295a21c (diff) | |
qpa: Document a requirement of the backing store implementation
Docuent the requirement that the alpha channels need to be properly
initialized by the implementation.
Change-Id: I03db81b44b43ea75feb1b983fb0725c65a3bd9f4
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Diffstat (limited to 'src/gui/painting')
| -rw-r--r-- | src/gui/painting/qplatformbackingstore_qpa.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/gui/painting/qplatformbackingstore_qpa.cpp b/src/gui/painting/qplatformbackingstore_qpa.cpp index 485190d301..ff7d91ccea 100644 --- a/src/gui/painting/qplatformbackingstore_qpa.cpp +++ b/src/gui/painting/qplatformbackingstore_qpa.cpp @@ -114,6 +114,9 @@ QWindow* QPlatformBackingStore::window() const This function is called before painting onto the surface begins, with the \a region in which the painting will occur. + \note A platform providing a backing store with an alpha channel + needs to properly initialize the region to be painted. + \sa endPaint(), paintDevice() */ |