   How to draw openGL symbols on a bitmap file?
  Hi,I want to draw openGL symbols on a bitmap file.I created one window using win32 application. On that I loaded one bitmap image using loadImage function. I used loadImage as I need to have zoom in and out functionality and others. Now, On that bitmap image I want to draw some openGL symbols. For that I downloaded lesson13 from http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=13 I made changes to that program such that I loaded bitmap as a backbround. It loaded properly but more flickering is coming.How to get rid of this flicker?Regards,Swetha   