Bug 10521

Summary:	glCopyImage implementation wrong if Zoom-factor is negative and dst and src image overlap
Product:	Mesa	Reporter:	WuNian <nian.wu>
Component:	Drivers/DRI/i915	Assignee:	Default DRI bug account <dri-devel>
Status:	VERIFIED FIXED	QA Contact:
Severity:	major
Priority:	medium	CC:	wei.z.wang
Version:	git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	test case

Description WuNian 2007-04-03 23:30:45 UTC

glCopyImage implementation has some error: 
When Zoom-factor is negative and dest and src image is overlapped, the dest image region will be black.

Comment 1 WuNian 2007-04-03 23:35:09 UTC

Created attachment 9472 [details]
test case

This test case comes from Red book's example--image.c. Just modified it, change the zoom factor to (1, -1), and let the dest image(10,80)x(74,16) overlap with the src image(0,0)x(64,64).
When run the case, the dest image's region(10,80)x(74,16) will be black.

Comment 2 Brian Paul 2007-04-04 07:48:30 UTC

Fixed in git.

Comment 3 WuNian 2007-04-10 22:55:15 UTC

commit: d4dc57bb13386f4503000dc34c6bf67a8387fc9f

Comment 4 WuNian 2007-06-07 00:34:47 UTC

The bug now exists with i915 and i965 drivers. Just change component to i915.
With xlib driver, the bug does not exist.

Comment 5 WuNian 2007-09-11 22:53:38 UTC

With i915 and i965 driver, the bug do not exist.

Comment 6 Adam Jackson 2009-08-24 12:26:20 UTC

Mass version move, cvs -> git

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