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https://bugs.freedesktop.org/show_bug.cgi?id=2010
Summary: depth and stencil readback are broken beyond x > 1023
Product: Mesa
Version: CVS
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Drivers/DRI/r200
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
depth and stencil readback are broken on r200 based cards beyond x coordinate
1023 (and I believe y coordinate too but not tested) (Mesa tests zreaddraw,
stencilwrap, move them to out of the right border on a 1280x1024 desktop and
back in to get a redraw). This appears to be caused by the r200_mba_z16 and
r200_mga_z32 functions in r200_span.c which use masks (y & 0x3FF) and (x &
0x3FF) respectively which will limit addressing to coordinates lower than 1024.
I'm not sure what the correct fix would be, though using 0x7FF (2047 which is
the 3d hardware limit for a single cliprect) solves the issue. But since this
just calculates a memory address, why is a mask even needed?
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