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-rw-r--r--src/openglwidgets/qopenglwidget.cpp7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/openglwidgets/qopenglwidget.cpp b/src/openglwidgets/qopenglwidget.cpp
index 7c565e10f3..119c4d1847 100644
--- a/src/openglwidgets/qopenglwidget.cpp
+++ b/src/openglwidgets/qopenglwidget.cpp
@@ -211,6 +211,13 @@ QT_BEGIN_NAMESPACE
\snippet code/doc_gui_widgets_qopenglwidget.cpp 2
+ \note It is up to the application to ensure depth and stencil buffers are
+ requested from the underlying windowing system interface. Without requesting
+ a non-zero depth buffer size there is no guarantee that a depth buffer will
+ be available, and as a result depth testing related OpenGL operations may
+ fail to function as expected. Commonly used depth and stencil buffer size
+ requests are 24 and 8, respectively.
+
With OpenGL 3.0+ contexts, when portability is not important, the versioned
QOpenGLFunctions variants give easy access to all the modern OpenGL functions
available in a given version: