Re: Optimized pixel manipulation
Re: Optimized pixel manipulation
- Subject: Re: Optimized pixel manipulation
- From: Ken Thomases <email@hidden>
- Date: Wed, 8 Oct 2008 11:21:14 -0500
On Oct 8, 2008, at 11:02 AM, Christian Giordano wrote:
After drawing the shapes, I do pixel operations, of course.
Are these pixel operations not something which can be accomplished by
changing the way you draw, for example using compositing modes?
Alternatively, do you have access to Core Image and does it do what
you need? Another thing to look at might be vImage.
For this
reason I create a bitmap context and after the drawing I get the
CGImageRef generated, I copy the pixels, I modify the pixels and then
I create a new image
If you've created a bitmap context, then you should already own the
backing bitmap data buffer. You can just manipulate it directly
without making a copy (via a CGImage).
Cheers,
Ken
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