Re: [Dri-devel] Smoother graphics with 16bpp on radeon

[Brian Paul]

magenta wrote:

On Tue, Dec 03, 2002 at 02:38:15PM +0000, Keith Whitwell wrote:

I'm with Allen in preferring that we don't add yet another environment
variable - especially for something which other OpenGL drivers haven't
needed.

Hmm. Windows drivers tend to have a GUI setup utility, which often has this sort of choice in it. That's the closest equivalent I can think of.

Why not make an extension for a hint?  glHint(GL_TEXTURE_FORMAT_HINT_MESA,
GL_FASTEST) for bpp-dependent, and GL_NICEST (and GL_DONT_CARE) would
always do it as 32bpp if unspecified.  That's the normal OpenGL way of
doing things like this...

Ugh. The internalFormat is itself a hint. If the programmer cares about
how much storage is used or the quality, he/she should use GL_RGB4, GL_RGB8,
GL_RGB16, etc.

Otherwise, by using a generic format like GL_RGB the user is indicating
that he doesn't especially care. In this case, I think the driver should
lean toward the higher quality texture formats.

-Brian



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