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-rw-r--r--src/opengl/qgl.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 4108b70094..0d4e9fc1b6 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -493,7 +493,8 @@ QSurfaceFormat QGLFormat::toSurfaceFormat(const QGLFormat &format)
retFormat.setSamples(format.samples() == -1 ? 4 : format.samples());
if (format.stencil())
retFormat.setStencilBufferSize(format.stencilBufferSize() == -1 ? 1 : format.stencilBufferSize());
- retFormat.setSwapInterval(format.swapInterval());
+ if (format.swapInterval() >= 0)
+ retFormat.setSwapInterval(format.swapInterval());
retFormat.setStereo(format.stereo());
retFormat.setMajorVersion(format.majorVersion());
retFormat.setMinorVersion(format.minorVersion());