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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 16:54:33 +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 #5, bug #28590 (project gnustep):

I finally managed to track down this bug. There is an endianness mismatch for
the XImage used as backing store. In XWindowBuffer
+windowBufferForWindow:depthInfo: the image is initialized with the byte order
of the X11 display. However, the memory based cairo image surface allocated in
XGCairoXImageSurface -initWithDevice: uses the host's native byte order. I
have attached a rather hackish patch to set the correct byte order for the
backing store; probably, there is a better way to do this.

(file #19492)

Additional Item Attachment:

File name: hack#28590.patch               Size:1 KB


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