On Wed, 5 Feb 2003, Arkadi Shishlov wrote: > On Tue, Jan 28, 2003 at 11:01:53PM -0500, Leif Delgass wrote: > > On Wed, 29 Jan 2003, Arkadi Shishlov wrote: > > > - 'Texture environment modes: GL_BLEND is done in software..' - mean > > > glTexEnv(GL_BLEND) is software. GL_DECAL is hw accelerated. > > > GL_MODULATE with GL_LUMINANCE_ALPHA is software. > > > > Right. GL_BLEND texture environment is not possible on mach64. Also, the > > card can't modulate alpha values when texturing, so texture environments > > where Final A = A fragment * A texture aren't fully compliant, e.g. > > GL_MODULATE with GL_RGBA textures. The case of GL_MODULATE/GL_RGBA is not > > What do you mean by aren't fully compliant? Final A = Fragment A or > Final A = Texture A? It looks like Fragment A..
Yes, I think that's right. As an example, there's a texture in the first UT map (can't remember the name offhand) that uses an RGBA vine texture with MODULATE. It looks it's applied to an opaque quad, since the transparent part of the texture shows up as black. -- Leif Delgass http://www.retinalburn.net ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
