QGraphicsItem and OpenGL textures

[scascio]

You ca set the viewport of your QGraphicsView to use OpenGL with these instructions :

setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));

setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));

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The QGLWiget can also be derived and therefore respond to the GL events, initializeGL, paintGL, ... but I dont know much about it.

Then to optimize you texture drawing with a QGraphicsItem, you can derive one and overload the paint event in wich you can draw directly from QImage into QPainter.
But I don't think this will be better once the image is loaded into the QGraphicsPixmapItem.

S.Cascio