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Re: NSImageView


From: Jeff Teunissen
Subject: Re: NSImageView
Date: Sun, 23 Jun 2002 12:18:32 -0400

Nicola Pero wrote:

> We can't change the API, so we probably can't just use a composite
> operation in NSImageView, but must do things properly and optimize
> properly the image drawing to the clipped area in the backend.

NSImageCells with alpha need to clear their background (or something)
before drawing, otherwise they draw over the tops of themselves, making
the sections with nonzero alpha get progressively opaque.

The same thing happens with antialiased text; text gets drawn over itself,
making it darker and darker the more times it's drawn.

-- 
| Jeff Teunissen  -=-  Pres., Dusk To Dawn Computing  -=-  deek @ d2dc.net
| GPG: 1024D/9840105A   7102 808A 7733 C2F3 097B  161B 9222 DAB8 9840 105A
| Core developer, The QuakeForge Project        http://www.quakeforge.net/
| Specializing in Debian GNU/Linux              http://www.d2dc.net/~deek/



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