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[bug #28590] Cairo backend displays wrong colors on X server with a diff

From: Wolfgang Lux
Subject: [bug #28590] Cairo backend displays wrong colors on X server with a different endianness
Date: Thu, 14 Jan 2010 14:44:47 +0000
User-agent: Mozilla/5.0 (Macintosh; U; PowerPC Mac OS X 10_4_11; en-US) AppleWebKit/531.9+(KHTML, like Gecko, Safari/528.16) OmniWeb/v622.10.0

Follow-up Comment #4, bug #28590 (project gnustep):

I wrote:
> To make things more weird, windows displayed during drag and drop show the
right colors.

Turns out that things are not weird at all: The dragging window uses
NSBackingStoreNonretained whereas the application windows use
NSBackingStoreBuffered (or maybe NSBackingStoreRetained). If I change the
backing store of the application windows to NSBackingStoreNonretained they
also display correctly, so I guess an unintended byte swap happens either when
writing to the backing store or when sending the backing store image to the


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