Re: CGBitmapRef and User Space Coordinates
Re: CGBitmapRef and User Space Coordinates
- Subject: Re: CGBitmapRef and User Space Coordinates
- From: Michael Vannorsdel <email@hidden>
- Date: Tue, 15 Apr 2008 20:59:14 -0600
Coordinate conversion should not be needed as the rect passed to the
drawRect: method is in the view's coordinate system. Perhaps if you
could give us a sample of what your drawing code looks like.
On Apr 15, 2008, at 8:52 PM, Carter R. Harrison wrote:
Hi All,
I have a CGBitmapRef that I am using as a backing store for my
NSView subclass. The CGBitmapRef has the same dimensions as my
NSView. Each time I draw to the backing store, I call my view's
setNeedsDisplayInRect: method to invalidate the area in which I have
drawn. Is it necessary to convert the rectangle to which I have
drawn into user space coordinates before feeding them into
setNeedsDisplayInRect:? It seems like I can get away without doing
this because my view is the same size as the backing store, but I'm
getting some weird behavior (things drawing correctly but in the
wrong area). Thanks in advance.
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