Bug 21997

Summary:	[gallium-mesa-7.4] Add tex_transfer to pipe_screen in order to speed up glreadpixels
Product:	Mesa	Reporter:	Yu Dai <yu.dai>
Component:	Other	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	patch to enable pipe_transfer Add code to faster glreadpixels if pbo is used

Description Yu Dai 2009-05-29 11:00:26 UTC

In the case video memory is in non-linear layout, calling get_tex_surface will result in a whole buffer data conversion no matter glreadpixels only wants data in a sub-rect. The attached code is trying to port pipe_transfer into gallium-mesa-7.4 branch in order to speed up glreadpixels.

Comment 1 Yu Dai 2009-05-29 11:08:27 UTC

Created attachment 26292 [details]
patch to enable pipe_transfer

Comment 2 Yu Dai 2009-06-04 13:31:20 UTC

Created attachment 26443 [details]
Add code to faster glreadpixels if pbo is used

This is to faster glreadpixels when pbo is bound to frame buffer. The path is on top of previous one.

Comment 3 Alan Hourihane 2009-06-15 08:01:26 UTC

Alex,

I've added this to the gallium-mesa-7.4 branch for now, but it could use with updating so we can get this onto master for future use.

Submitting patches for master to this bug would be good.

Thanks.

Comment 4 Corbin Simpson 2010-03-27 12:52:51 UTC

Closing. We've reworked transfers, and things seem to work well.

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