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Extensions

Started by Boder Jun 21, 2006 at 1:25 PM 3 replies 1.6k views

Original Post

Jun 21, 2006 at 1:25 PM

Hi, is there any site that has a rundown of what extensions are generally provided by different graphics cards? When using an extension, it helps to judge how big your target audience is. I'm specifically interested in FBO, texture rectangle, and non_power_of_two. Also, how big is the performance hit on using non pow2 textures?

Ravuya

Jun 21, 2006 at 1:29 PM

I believe non-power-of-2 is in pretty much every card made after or during the GeForce era.

Fruny

Jun 21, 2006 at 1:36 PM

Yes

GL_EXT_framebuffer_object
GL_EXT_texture_rectangle
GL_ARB_texture_non_power_of_two

Enrico

Jun 21, 2006 at 1:38 PM

Quote:
Original post by Ravuya
I believe non-power-of-2 is in pretty much every card made after or during the GeForce era.

No, you are wrong. All ATI cards up to X1k cards only support GL_ARB_texture_rectangle, because of the missing filter (required by GL_ARB_texture_non_power_of_two).
When using a NPOT texture on ATI cards together with a texture filter, the driver will fallback to software rendering (which is extremely slow). So be careful with that.

Ravuya

Jun 21, 2006 at 2:30 PM

Quote:
Original post by Enrico
Quote:
Original post by Ravuya
I believe non-power-of-2 is in pretty much every card made after or during the GeForce era.

No, you are wrong. All ATI cards up to X1k cards only support GL_ARB_texture_rectangle, because of the missing filter (required by GL_ARB_texture_non_power_of_two).
When using a NPOT texture on ATI cards together with a texture filter, the driver will fallback to software rendering (which is extremely slow). So be careful with that.

Those bastards. I'll have to go back and change a couple of my textures now. Thanks.

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