Ian Romanick wrote: > > On Wed, Mar 13, 2002 at 02:02:25AM +0100, Dieter N�tzel wrote: > > On Tue, Mar 12, 2002 at 23:41:23, Ian Romanick wrote: > > > S3 owns S3TC, not FXT1 and not the VQ in the RagePro and not the VQ > > > in the PowerVR SG. > > > > We have to convert from S3TC to FXT1 (UT for example). > > Alle klar! Yes, if you decompress S3TC textures in your driver you are > using S3's IP. Fine. However, the ARB_texture_compression spec makes > absolutely NO REQUIREMENT that you do this. As far as I know (and perhaps > Brian can comment more), it is 100% for an application to do: > > glTexImage2D( GL_TEXTURE_2D, 0, GL_COMPRESS_RGB_ARB, width, height, > 0, GL_RGB, GL_UNSIGNED_BYTE, image_data ); > > and have the driver select the compression mode (if any) to use.
Right. > The driver > is the free to use S3TC, FXT1, or anything else it chooses. If I read the > spec correctly, the driver can even choose to ignore the internal format and > just use GL_RGB. Right. That's what the Mesa software renderer does. -Brian _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
