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-rw-r--r--src/opengl/qgl.cpp7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 3f32cf3..48e43b2 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -4393,6 +4393,13 @@ static void qt_gl_draw_text(QPainter *p, int x, int y, const QString &str,
\note This function temporarily disables depth-testing when the
text is drawn.
+ \note This function can only be used inside a
+ QPainter::beginNativePainting()/QPainter::endNativePainting() block
+ if the default OpenGL paint engine is QPaintEngine::OpenGL. To make
+ QPaintEngine::OpenGL the default GL engine, call
+ QGL::setPreferredPaintEngine(QPaintEngine::OpenGL) before the
+ QApplication constructor.
+
\l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
*/