Weird black screen with mousepointer icons when using QGLWidget
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Anybody ever experienced this?
I have an iMX6 embbedded linux board, with a LCD and touchscreen.
I have an QML QtQuick 1.1 / C++ application. That works on the target.
When I want to HW accelerate it and put it on a QGLWidget it shows the first screen of the app. But when touching or clicking with the mouse, I get a black screen with all the mouse pointer icons blown up (like the hand, the arrow, the sand-hourglass, etc), after a screen refresh I get my app screen back. When an animation is accuring, the screen flickers between the app screen and this black mouse icon screen.If I port my app to QML QtQuick 2.0/ C++, which is HW accelerated by default and not using the QDeclativeView, but the QQuickView, the app works fine.
This is what I do to make it a QGLWidget.
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// Set view optimizations not already done for QDeclarativeView
setAttribute(Qt::WA_OpaquePaintEvent);
setAttribute(Qt::WA_NoSystemBackground);// Make QDeclarativeView use OpenGL backend
QGLWidget *glWidget = new QGLWidget(this);
setViewport(glWidget);
setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
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I switched to QT5.1.0 and figured out there is a environmental variable to hide the cursor on EGL and that seems to do the trick.
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export QT_QPA_EGLFS_HIDECURSOR=1
@Maybe it masks the real problem, but I do not need a mouse pointer.
