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Dreq

Off-screen surfaces

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Is there documentation or a tutorial on drawing to an off-screen surface, then adding that suface to the ''back'' surface before ''flippinng'' (double buffernig). I know double-buffering stops flicker.. it draws everything to one surface while the main screen is showing the other. Then once drawing is compliete, the pointers swap. But what I want to do is have a 3rd surface that I can draw to (so i can apply custom masking without effecting the main screen), then paste it over the ''back'' surface (there wouldn''t happen to be a method of clearing the buffer with alpha 255 instead of a pure color would there? ^_^).

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Guest Anonymous Poster
You should look up PBuffers and render to texture extentions. There are some tutorials on the nvidia developer site i think.
cheers

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Guest Anonymous Poster
here to be more specific: http://developer.nvidia.com/object/ogl_rtt.html

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