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

qtnext qtnext at gmail.com
Thu May 2 23:26:27 CEST 2013


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);

|QPainter::TextAntialiasing |QPainter::SmoothPixmapTransform,true);



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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