[Interest] qt4 opengl and qpainter drawText Crash or not visible

[qtnext]

Hi,

I need to add text support in my qt opengl/qt3D application. I try to draw
text in a fbo like this:



 QPainter painter(m_render_fbo);

  painter.setRenderHints(QPainter::Antialiasing
|QPainter::TextAntialiasing |QPainter::SmoothPixmapTransform,true);

 document.drawContents(&painter);

  painter.end();


sometimes it works, and sometimes not : black or crash in
drawCachedGlyphs ... depending on what I was doing before (for example
it don't works if I was previoulsy drawing a texture). I have tryed to
setup various opengl state, but I don't which one to setup to ensure
to have a clean opengl state to draw the text using opengl engine ?
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