I am working in Windows Environment. When I attempt to run the OpenGL App. in 24-bit desktop color mode it runs very slowly. But in the case of 16-bit desktop color mode it runs very fast. Means when I am in 16-bit color mode the h/w acceleration enabled. Where as in 24-bit color mode it is disabled. How to enable h/w acceleration even I am working in 24-bit color mode also?
I am working on Windows 2000 system, my graphics card is Intel 810.
It may well be that Intel integrated graphics can only accelerate 16 bit color modes. Not sure atm but it’s a possibility. It’s definitely what happens with Voodoo 3 cards.
It may actually be accelerated in 24-bit color but it has run out of either memory or bandwidth to handle it. The Intel 810 (like all integrated video chips) is low-end video display.
The i810 is a very strange integrated graphics chips that can dynamicaly allocated system memory as video memory. However its very limited. As far as I recall you could not have more then 4MB for the framebuffer and 2MB for the zbuffer.
Oh and yes like all old crappy 3d chips it doesnt accelerate 24bit 3d.
Originally posted by Qwerty77:
[b]The i810 is a very strange integrated graphics chips that can dynamicaly allocated system memory as video memory. However its very limited. As far as I recall you could not have more then 4MB for the framebuffer and 2MB for the zbuffer.
Oh and yes like all old crappy 3d chips it doesnt accelerate 24bit 3d.[/b]
I saw this info in the intel side:
in 2D games and applications:
640x480 - 4, 8, 16, 24-bit color at 60,70,72,75,85,100 Hz refresh rates
800x600 - 8, 16, 24-bit color at 60,70,72,75,85,100 Hz refresh rates
1024x768 - 8, 16, 24-bit color at 60,70,72,75,85,100 Hz refresh rates
1152x864 - 8, 16, 24-bit color at 60,70,72,75,85 Hz refresh rates
1280x1024 - 8, 16, 24-bit color at 60,70,72,75,85 Hz refresh rates
1600x1200 - 8-bit color at 60,70,72,75 Hz refresh rates
in 3D games and applications:
640x480 - 16-bit color at 60,70,72,75,85,100 Hz refresh rates
800x600 - 16-bit color at 60,70,72,75,85,100 Hz refresh rates
1024x768 - 16-bit color at 60,70,75,85,100 Hz refresh rates
In 2D applications h/w accelertion is supported under 24-bit color mode also. I am using OpenGL for 2D purpose only. Is it possible to accelerated in 24-bit color mode.
[This message has been edited by ramana (edited 12-28-2003).]