View Full Version : Color Modes

12-09-2003, 11:13 PM
I am developing OpenGL Applications under Windows environment. When I run the applications I have faced one problem; when I change the Desktop display settings to 16-bit color mode my applications runs very fast, whereas in 24-bit color mode runs very slow. How to solve this problem? How to run my applications very fast in even 24-bit color mode?

12-10-2003, 04:37 AM
What kind of video card/operating system do you have?

Did you try different pixel formats? Maybe you are not getting an accelerated context.

Somthing like 32-bit color, 24-depth, 8-stencil. This should work with anything made after the TNT2 or so.


12-10-2003, 05:13 AM
usually if your application is fill limited, switching from 32 bit to 16 bit doubles the framerate. (guess why... http://www.opengl.org/discussion_boards/ubb/wink.gif)
when you want to make your app in 16bit mode as fast as with 32bit, you have to save fillrate.(blending/multipass consumes most of it. try to optimize them.). if you don't have any room for fillrate optimizations, only new hardware can solve your problem.

12-10-2003, 05:58 PM
If the Desktop settings color mode is 16-bit; it shows,
Vendor : Intel
Renderer : Intel810/810E

If the Desktop settings color mode is 24-bit; it shows,
Vendor : Microsoft Corporation
Renderer : GDI Generic

I am working on Windows 2000 Operating System.