Hmm, what -draw... methods are there for CIImage? A look in CIImage.h
shows none, nor does the documentation list any. It would be too good
to be true. ;-)
On Dec 21, 2006, at 10:59 AM, douglas a. welton wrote:
Are you doing anything with the resulting NSImage other than
drawing it (e.g., archiving or using other NSImageReps)?
If not, I'd just use CIImage's -draw... methods and be done with it.
On Dec 21, 2006, at 1:34 PM, Michael Watson wrote:
Speaking of drawing CIImages into views, currently I'll create my
CIImage, draw it into an NSImage, and then use the NSImage in
whatever view I'm drawing into.
I suspect I may be doing more work than is necessary to use
CIImages. Any tips from the crowd?
On 21 Dec, 2006, at 12:39, douglas a. welton wrote:
Your situation seems like a perfect fit for using Core Image.
Create a CIImage, draw it into the first view, then apply a the
crop and scale CIFilters (CICrop & CILanczosScaleTransform ) and
draw the image into the second view. All the work gets done on
the GPU, roughly in realtime.
On Dec 21, 2006, at 6:13 AM, Livio Isaia wrote:
Skip this if you have no time to loose!
I know that my problem seems a bit strange, if not silly, but
here's the reason why.
I have two views into which I draw the same image: in the first
one at normal size, in the second in a scaled size (bigger) so
that the user can clearly see each image pixel. Practically a
pixel in the first view will become a 6x6 rect in the second one.
Now, if I draw a bezier path (let's say an oval one, for
example) in the first, I want it to be drawn also in the second,
but here pixels will become rects, and if I use a scaling
transformation I'll get a bigger oval but not a sequence of
rects. Hope it's clear...
That's why I thought to draw it all in one image and then draw
it in a bigger rect (after all the final result will be a single
image...). Of course it' not a great solution, and it's
expensive in terms of time and memory.
I tried to calculate the path rects using formulas but with no
exciting results (do you know where to find the formulas used in
So any idea will be apreciated!
Thanks again to everybody,
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