On Tue, Nov 9, 2010 at 2:12 AM, Russell Shaw <rjs...@netspace.net.au> wrote: > Hi, > How should the "format" of a DRI2 buffer be determined? > > > http://www.x.org/releases/current/doc/dri2proto/dri2proto.txt > > DRI2ATTACH_FORMAT { attachment: CARD32 > format: CARD32 } > > The DRI2ATTACH_FORMAT describes an attachment and the associated > format. 'attachment' describes the attachment point for the buffer, > 'format' describes an opaque, device-dependent format for the buffer. > > > xorg-server-1.7.7/hw/xfree86/dri2/dri2ext.c > > > If it's opaque, how does a user or library know what bytes are > red/green/blue > so that you can draw a line in the right colour? >
Only driver knows it. That why user code would need glx extension to map and provide information about format. _______________________________________________ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
