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Question about image caching and background color

From: Willem Rein Oudshoorn
Subject: Question about image caching and background color
Date: 24 Nov 2001 00:28:42 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.1

While improving DnD I encountered the problem that the method 

-[NSImage compositeToPoint:fromRect:operation:]

behaves differently if the image is cached, or not. 

If the image is cached the background is *not* drawn
and if it is not cached the background *is* drawn.

Well, this seems a bug to me.  There are two ways
of fixing this:

(A) fix the method in NSImage by drawing the background
(B) Put the background in the cached image.

Question:  What is the preferred way?

Wim Oudshoorn.

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