On Mar 23, 2007, at 10:45 AM, Shawn Erickson wrote:
On 3/23/07, Mike Garcia <email@hidden> wrote:
I have some data stored in memory in a CMYKA format. How can I
to the screen with Quartz? Do I have to convert it to RGBA? Is
You have CMYK with alpha?
If so I don't believe Quartz2D supports that natively. It supports
CMYK without alpha IIRC.
CMYKA does not make much sense really anyway. CMYK is a printing
format... subtractive colors on ink. Alpha deals with light
transmission (additive colors) which really only makes sense on
computer screens. I suppose you could come up with a similar
concept to Alpha for subtractive colors, but how are you really going
to implement it? In print you might achieve transparency through
transparent inks (which would probably be hard to control) or as
it's done today -- through screening.
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