View Full Version : Combining gid and opengl

12-22-2000, 04:03 AM
I am using opengl and win32. I need to render a screen using opengl, and paste a bitmap on it (using gid, i presume). can some1 help me?
I have tried to use glFinish() followed by some basic gdi commands, but i am having some trouble with the buffer swapping...
i am not very conversant with gdi.
please help

12-22-2000, 05:53 AM
I suggest that you don't use GDI function calls with device contexts associated with rendering contexts. Instead, use GL functions like glReadPixels, glDrawPixels, and windows' DIB (Device Independent Bitmaps).

12-22-2000, 06:46 AM
I've tried doing OpenGL w/GDI but it doesn't really work for the buffering. I never could figure out or find out how do make the buffering work right. If you can't get it either but still want to use GDI, perhaps Driect3D/GDI/DirectDraw might be a good solution.

12-22-2000, 12:38 PM
If you want some code of how to read from or write to the frame buffer, send me a letter and I'll try to write you some code.

12-22-2000, 02:46 PM
I think that GDI and OpenGL can not be combined using double buffering. Should be in the doc from MSDN.