Re: Random image problem has me stumped :(
Re: Random image problem has me stumped :(
- Subject: Re: Random image problem has me stumped :(
- From: Serge Meynard <email@hidden>
- Date: Wed, 23 Mar 2005 18:38:41 -0500
On Mar 23, 2005, at 18:27, John Brownlow wrote:
That example locks focus on 'self' which is an NSView. There's a typo
in the mail which says it is a category on NSImage, but it isn't. His
example shows how you draw into a view and then take a snapshot of it.
On Mar 23, 2005, at 6:16 PM, Serge Meynard wrote:
I'm not sure I understand your point... Using lockFocus is how you
draw into, or read back from, an arbitrary NSImage, isn't it? Your
own post from 2 years ago at
(http://lists.apple.com/archives/cocoa-dev/2002/Dec/msg00447.html)
does exactly the same thing. The code above isn't a prelude to
drawing the image, it's just a couple of lines of test code I added
right after I'm done creating the image, to check the image's
validity using the debugger.
You're right, I missed that detail. Still, the call to
initWithFocusedViewRect: does actually work for the 99% of images that
are valid. And even if we forget about that, the fact remains that some
images are broken, test code or not. I'm still no closer to
understanding *what* is wrong about the last 1% of images or *why* it
goes wrong. And no, it's not related to views or focus; the images are
all created in the same loop and in exactly the same way.
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