diff options
| author | Laszlo Agocs <laszlo.agocs@digia.com> | 2014-09-16 12:36:02 +0200 |
|---|---|---|
| committer | Laszlo Agocs <laszlo.agocs@digia.com> | 2014-09-18 17:45:05 +0200 |
| commit | 5d5de7a97fa0f6fc4b83403a7c282d180f4e2060 (patch) | |
| tree | 1f5c69a71d4fbebb160b80c017cceebee1e20991 | |
| parent | 4aba2d07d2fe67beaf544a4b38c5b9aa8b8ec39b (diff) | |
QOpenGLWidget: Play nice with empty paintGL
Applications that do not override paintGL() (may happen in some test code)
will not perform any GL rendering, not even clearing. This is fine, but
to be safe we need to do a clear right after creating the FBO in order to
prevent showing garbage.
Task-number: QTBUG-38327
Change-Id: If062901bb18724f961e41856085470e37b49abbe
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
| -rw-r--r-- | src/widgets/kernel/qopenglwidget.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/widgets/kernel/qopenglwidget.cpp b/src/widgets/kernel/qopenglwidget.cpp index 524597f7a1..13e3ee876b 100644 --- a/src/widgets/kernel/qopenglwidget.cpp +++ b/src/widgets/kernel/qopenglwidget.cpp @@ -563,6 +563,7 @@ void QOpenGLWidgetPrivate::recreateFbo() resolvedFbo = new QOpenGLFramebufferObject(deviceSize); fbo->bind(); + context->functions()->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); paintDevice->setSize(deviceSize); paintDevice->setDevicePixelRatio(q->devicePixelRatio()); |