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Re: drawing with transparency
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Re: drawing with transparency


  • Subject: Re: drawing with transparency
  • From: Izidor Jerebic <email@hidden>
  • Date: Wed, 6 Nov 2002 10:16:24 +0100

Hello!

There are problems with transparency (i.e. lots of bugs in MacOSX), but here is what I understand to be the current state:
1. If you only draw to screen, you can just set alpha component in NSColor and use it as any other color.
2. If you want to have PDF with transparent colors, you must use Core Graphics routines, because AppKit strips alpha when not drawing to screen.
3. And when using Core Graphics, CMYK text transparency seems to not work (RGB works, though).

Regards,
izidor Jerebic

On Wednesday, Nov 6, 2002, at 03:07 Europe/Ljubljana, Louis Foucart wrote:

Hi,

I am looking to a way to draw with transparency. For example in my NSView I want to fill transparent rectangles which can be superposed. Is it simple as fill with colors with special parameters ? special colors ?

Thanks for your attention,

Louis.
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References: 
 >drawing with transparency (From: Louis Foucart <email@hidden>)

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