to look for when planing to do some
image data processing using Cocoa assuming that I need random access at all the
data (mainly to diffuse some quantization error to nearby pixels)?
thanks,
Lars
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So what would be the appropriate stuff to look for when planing to do some
image data processing using Cocoa assuming that I need random access at all
the data (mainly to diffuse some quantization error to nearby pixels)?
thanks,
Lars
Since you can't use NSImage, you could try Core Image.
You can do all that with CGImage in your restricted environment. You can
use a bitmap or layer context and then later render it on whatever view
you wish.
There is a good Core Graphics Quartz tutorial at
Hi Helder, I found this post that can be really helpful when I will
have to do my pixel operations:
http://www.rodgutierrez.com/blog/2008/07/how-to-create-a-rgba-cgimagere.html
I still have to find how to draw an CGImageRef in another one
regardless the current context, I'm still wondering if
I think I found what to do. I need to create a bitmap context from the
bitmap and drawing there. It makes sense that everything drawn is
handled by contexts of course, I'm just a bit concerned about
performances.
Thanks, chr
On Thu, Sep 25, 2008 at 7:35 AM, Christian Giordano
[EMAIL PROTECTED]
On Sep 25, 2008, at 3:52 AM, Christian Giordano wrote:
I think I found what to do. I need to create a bitmap context from the
bitmap and drawing there. It makes sense that everything drawn is
handled by contexts of course, I'm just a bit concerned about
performances.
Internally NSImage will
Hi guys, is there some good tutorial around about how to manipulate
bitmaps in Cocoa?
I would be interested on:
- copy portion of image over another with a mask (this should be
pretty straight forward with quartz2d)
- apply threshold
- apply effects like blur
Not sure if some of this, like the
On 24 Sep 2008, at 10:50, Christian Giordano wrote:
Hi guys, is there some good tutorial around about how to manipulate
bitmaps in Cocoa?
I would be interested on:
- copy portion of image over another with a mask (this should be
pretty straight forward with quartz2d)
[[NSImage alloc]
Thanks Mike, I can't use NSImage (guess why) but a subset. Btw, the
problem I have is that I have a view which contains an image. I would
like to draw in the image, not in the container view so I need to
provide to the draw method the image context. Is this a good approach
or all the drawing
