Re: Strange issue with PNG files

If by "state" you mean at ppi != 72, yes.

Images come in all resolutions (assuming they have resolution at all (e.g.
pdf)). You can draw it at its natural size, at a size that makes it come out
pixel-for-pixel (build the NSSize, etc.) or anything in-between.

BTW, don't forget that an NSImage can have multiple representations, each
with a different pixel size (load an ICNS to see that). In that case, your
concept of "this state" isn't even meaningful.

Images are much more than a bag of pixels.

Avi

On Thu, Mar 4, 2010 at 2:23 PM, Eric Gorr <[email protected]> wrote:

> On Mar 4, 2010, at 2:06 PM, Avi Drissman wrote:
>
> > It's apparently not a 72ppi picture. Even though the image is 16x14
> pixels, at ~200ppi something 14 pixels high is only 5 points high.
> >
> > You are getting the full image, and I bet if you took the NSImageRep and
> asked it for -pixelsHigh or -pixelsWide you'd get the 14 and 16.
>
> Yes, that is true.
>
> > If you want to draw it pixel for pixel despite the high ppi, use
> -pixelsHigh/-pixelsWide, create an NSSize of that size, and draw it
> "scaled".
>
> So, the only/recommended way to determine when an image is in this state is
> to compare what [image size] returns vs. pixelsHeight & pixelsWide?
>
>
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