Re: Changing the background of a 1 bit bitmap?
Re: Changing the background of a 1 bit bitmap?
- Subject: Re: Changing the background of a 1 bit bitmap?
- From: Glen Simmons <email@hidden>
- Date: Mon, 4 Oct 2004 12:58:53 -0500
On 4 Oct, 2004, at 12:39 PM, R. Scott Thompson wrote:
On Oct 4, 2004, at 11:25 AM, Glen Simmons wrote:
I'm creating an NSImage from some 1 bit bitmap data using the
-[NSBitmapImageRep initWithBitmapDataPlanes:pixelsWide: ...] method
passing NSCalibratedBlackColorSpace so that 1 bits become black
pixels and 0 bits become white pixels. I'd like the 0 bits to become
a color of my choice instead of white. Is there an easy way to do
this?
What you want is a different Compositing operation
(NSCompositeSourceOver I think). There doesn't appear to be a way to
do that with an NSImageView. Perhaps you could create a custom view
and use NSImage calls yourself?
I did say "easy". :-) I was thinking this could be done at the time of
creation. The replacement color would always be the same, so I figured
some particular value passed as the colorSpaceName: parameter would do
it. Not so?
Glen
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