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-rw-r--r--src/gui/egl/qeglproperties.cpp3
-rw-r--r--src/opengl/qgl_x11egl.cpp4
2 files changed, 7 insertions, 0 deletions
diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
index 5543547..3638de5 100644
--- a/src/gui/egl/qeglproperties.cpp
+++ b/src/gui/egl/qeglproperties.cpp
@@ -241,6 +241,9 @@ void QEglProperties::setRenderableType(QEgl::API api)
// reductions in complexity are possible.
bool QEglProperties::reduceConfiguration()
{
+ if (value(EGL_SWAP_BEHAVIOR) != EGL_DONT_CARE)
+ removeValue(EGL_SWAP_BEHAVIOR);
+
#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
// For OpenVG, we sometimes try to create a surface using a pre-multiplied format. If we can't
// find a config which supports pre-multiplied formats, remove the flag on the surface type:
diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp
index 6f210ce..d67a3ea 100644
--- a/src/opengl/qgl_x11egl.cpp
+++ b/src/opengl/qgl_x11egl.cpp
@@ -199,6 +199,10 @@ bool QGLContext::chooseContext(const QGLContext* shareContext)
configProps.setRenderableType(QEgl::OpenGL);
qt_eglproperties_set_glformat(configProps, d->glFormat);
+ // Set buffer preserved for regular QWidgets, QGLWidgets are ok with either preserved or destroyed:
+ if ((devType == QInternal::Widget) && qobject_cast<QGLWidget*>(static_cast<QWidget*>(device())) == 0)
+ configProps.setValue(EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
+
if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete d->eglContext;
d->eglContext = 0;