Re: Command line tool using NSImage?
Re: Command line tool using NSImage?
- Subject: Re: Command line tool using NSImage?
- From: Ken Ferry <email@hidden>
- Date: Sun, 22 Aug 2010 20:36:24 -0700
On Aug 21, 2010, at 11:51 AM, Alastair Houghton <email@hidden> wrote:
> On 21 Aug 2010, at 14:35, Jaime Magiera wrote:
>
>> On Aug 21, 2010, at 5:33 AM, Ken Thomases wrote:
>>
>>> In short, you can't reliably use AppKit (including NSImage) from a daemon or remote shell.
>>
>> Thanks for the link. Interesting read.
>>
>> In short, that's really a bummer. It totally negates a chunk of functionality from my framework. I'll have to resort to something like keeping a client app running on the server that communicates with the webapp/shell via webservice (a security risk in itself). Also, it removes a lot of functionality from the API. There are a myriad of useful shell/server tools that could be created with that Cocoa functionality.
>>
>> Has anyone heard of Apple coming up with a solution to this conundrum? Or is it Bug Report time? There has to be some way to do it securely.
>
> The particular problem with NSImage is that it uses the window server to provide buffer space for image caches. That isn't going to work from a non-GUI session.
FYI, that's only true prior to 10.6. NSImage no longer uses windows. See the 10.6 AppKit release notes.
The general issues with use of AppKit without a window server connection still hold.
-Ken
Cocoa Frameworks
>
> I don't see why NSBitmapImageRep wouldn't work, though, OTOH, though Ken is right that using any part of AppKit is potentially problematic.
>
> You can, of course, drop down to the Quartz/Core Image/ImageIO layer(s) and do things there, which should work just fine.
>
> Kind regards,
>
> Alastair.
>
> --
> http://alastairs-place.net
>
>
>
>
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