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Diffstat (limited to 'src/gui/painting/qbackingstore.cpp')
| -rw-r--r-- | src/gui/painting/qbackingstore.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp index 88be97b717..ff181bac6b 100644 --- a/src/gui/painting/qbackingstore.cpp +++ b/src/gui/painting/qbackingstore.cpp @@ -70,7 +70,20 @@ public: \since 5.0 \inmodule QtGui - \brief The QBackingStore class provides the drawing area for top-level windows. + \brief The QBackingStore class provides a drawing area for QWindow. + + QBackingStore enables the use of QPainter to paint on a QWindow with type + RasterSurface. The other way of rendering to a QWindow is through the use + of OpenGL with QOpenGLContext. + + A QBackingStore contains a buffered representation of the window contents, + and thus supports partial updates by using QPainter to only update a sub + region of the window contents. + + QBackingStore might be used by an application that wants to use QPainter + without OpenGL acceleration and without the extra overhead of using the + QWidget or QGraphicsView UI stacks. For an example of how to use + QBackingStore see the \l{gui/rasterwindow}{Raster Window} example. */ /*! |