From e6f84312a5352c742f240385e2814ef9b865db22 Mon Sep 17 00:00:00 2001 From: Holger Hans Peter Freyther Date: Mon, 20 Feb 2012 10:30:07 +0100 Subject: [PATCH] qpa: Document a requirement of the backing store implementation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Docuent the requirement that the alpha channels need to be properly initialized by the implementation. Change-Id: I03db81b44b43ea75feb1b983fb0725c65a3bd9f4 Reviewed-by: Samuel Rødal --- src/gui/painting/qplatformbackingstore_qpa.cpp | 3 +++ 1 file changed, 3 insertions(+) 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() */