Bug 12273

Summary:	read back unstable result, when drawing POINTS mode PLYGON to FRONT and BACK buffer
Product:	Mesa	Reporter:	Shuang He <shuang.he>
Component:	Drivers/DRI/i965	Assignee:	haihao <haihao.xiang>
Status:	VERIFIED DUPLICATE	QA Contact:
Severity:	normal
Priority:	medium	CC:	dri-devel
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	test case

Description Shuang He 2007-09-03 19:50:14 UTC

this issue happens on Q965, GM965

Reproduce Steps:
start a raw X server (this issue seems not happen on a non-raw X server)
run and kill the test case many times (it's unstable)

Note:
it's easier to reproduce this issue, by start the test case immediately after the previous one is killed.
this issue seems not happen in non-dri mode.

Comment 1 Shuang He 2007-09-03 19:52:18 UTC

Created attachment 11403 [details]
test case

following is what test do:
set draw buffer and read buffer to GL_FRONT
clear the color buffer
drawing GL_POINTS mode POLYGON to GL_FRONT buffer
read back what have been drawn
then, set draw buffer and read buffer to GL_BACK
clear the color buffer
drawing the same POLYGON
read back what have been drawn

results from two buffer, sometimes are different.

Comment 2 haihao 2007-09-04 18:11:05 UTC


*** This bug has been marked as a duplicate of bug 11378 ***

Comment 3 Adam Jackson 2009-08-24 12:28:00 UTC

Mass version move, cvs -> git

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