Re: Optimized pixel manipulation
Re: Optimized pixel manipulation
- Subject: Re: Optimized pixel manipulation
- From: "Christian Giordano" <email@hidden>
- Date: Wed, 8 Oct 2008 17:26:30 +0100
> 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).
How could I access its buffer?
Cheers, chr
On Wed, Oct 8, 2008 at 5:21 PM, Ken Thomases <email@hidden> wrote:
> 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
>
>
> Cheers,
> Ken
>
>
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden