I'd like to know this too - are they stored as images once created or do they have to be redrawn as vectors - in which case should there be a vector to image command?
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They're drawn as vectors. All shapes are triangulated and stored as compact triangle strips internally and these triangles are drawn with a single OpenGL draw command. To convert a shape to an image, render to texture is the way.
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(It's OK, I can use pngs for those for the moment though)
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