How can I save OpenGL draw with OpenGL?

Question

I draw a screen with OpenGL commands. And I must save this screen to .bmp or .png format. But I can\'t do it. I am using glReadpixels but I can\'t do continue. How can I sav

Answer 1

I know you're asking for raster formats, but an indirect way would be to first output vector graphics through gl2ps (http://www.geuz.org/gl2ps/). Examples of usage are provided with the package and on the site (http://www.geuz.org/gl2ps/#tth_sEc3).

Then, the vector output can be converted to the format of your choice using another tool (Inkscape, Image/GraphicsMagick, etc.) or library. An added benefit is you can convert to bitmaps of any resolution in the future.