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.
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