Hi Quincey,
> On Jan 15, 2016, at 11:24 , Andreas Höschler <[email protected]
> <mailto:[email protected]>> wrote:
>>
>> However, I generated the image rep with a 851 x 899 view and wrote it into a
>> PNG file (code in earlier mail).
>
> Yes, I saw, but you didn’t include (or I couldn't find) the log output that
> showed the size of the NSImage object, even though you had a line of code to
> log it.
15/01/16 21:03:29,842 SOSmartBrowser[56701]: image <NSImage 0x7fb35c30
Size={698, 782} Reps=(
"NSBitmapImageRep 0x7fb18de0 Size={698, 782} ColorSpace=(not yet loaded)
BPS=8 BPP=(not yet loaded) Pixels=1396x1564 Alpha=YES Planar=NO Format=(not yet
loaded) CurrentBacking=nil (faulting) CGImageSource=0x81d92150"
)>
> NSImage, when given image data that has A x B pixels and a PPI (pixels per
> inch) of C, may choose to ignore C, rather than use it to compute C x D
> points. It’s not clear whether this happened in your case or not.
>
> It does this because PPI is often just wrong. The actual pixel dimensions are
> the only reliable numbers.
>
> Same thing. Preview doesn’t believe any metadata about the image size. It
> just works with the pixels.
Good enough for me! It's just important to note that NSScaleNone is no longer
an option due to the points/pixel discrepancy (this was no issue on earlier
systems). Not yet completely used to working with these high resolution
screens. :-)
Thanks,
Andreas
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