Here is code that will write it out as a PNG
void WriteImageToPath(CGImageRef image,const char *path)
{
CGImageDestinationRef dest;
CFURLRef url;
url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault,(const
UInt8 *)path,strlen(path),0);
dest = CGImageDestinationCreateWithURL(url,CFSTR("public.png"), 1, NULL);
CGImageDestinationAddImage(dest,image,NULL);
CGImageDestinationFinalize(dest);
CFRelease(url);
CFRelease(dest);
}
To write it out a a jpeg change the UTI type above from public.png ->
public.jpeg
Its all and there should be examples.
Vince
> On Jan 15, 2019, at 2:35 PM, Bruce Stephens <br...@toorak.com> wrote:
>
> Any chance to see those few lines of code for NSimage ImageIO to jpeg?
> Thanks. Bruce.
>
>> On 16 Jan 2019, at 7:00 am, cocoa-dev-requ...@lists.apple.com wrote:
>>
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>> Today's Topics:
>>
>> 1. NSImage to JPEG file? (Carl Hoefs)
>> 2. Re: NSImage to JPEG file? (Vince DeMarco)
>> 3. Re: NSImage to JPEG file? (Carl Hoefs)
>> 4. Re: NSImage to JPEG file? (Alex Zavatone)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 14 Jan 2019 13:17:41 -0700
>> From: Carl Hoefs <newsli...@autonomy.caltech.edu>
>> To: Cocoa Developers <cocoa-dev@lists.apple.com>
>> Subject: NSImage to JPEG file?
>> Message-ID:
>> <13373da6-ece9-445d-9ff0-08a78393e...@autonomy.caltech.edu>
>> Content-Type: text/plain; CHARSET=US-ASCII
>>
>> I have a background macOS daemon process (aka Foundation-based "command line
>> tool") that needs to write out a JPEG file to local disk. The image resides
>> in an NSImage object (or alternatively, an NSData of raw RGB image data).
>>
>> Short of resorting to something like libjpeg, what is the ObjC way to do
>> this?
>>
>> -Carl
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Mon, 14 Jan 2019 12:26:08 -0800
>> From: Vince DeMarco <dema...@apple.com>
>> To: Carl Hoefs <newsli...@autonomy.caltech.edu>
>> Cc: Cocoa Developers <cocoa-dev@lists.apple.com>
>> Subject: Re: NSImage to JPEG file?
>> Message-ID: <64df7de3-f45f-4205-991c-84bf7e131...@apple.com>
>> Content-Type: text/plain; CHARSET=US-ASCII
>>
>> Use ImageIO.
>>
>> create a CGImageDestinationRef and add the CGImage to it.
>>
>> Vince
>>
>>
>>
>>> On Jan 14, 2019, at 12:17 PM, Carl Hoefs <newsli...@autonomy.caltech.edu>
>>> wrote:
>>>
>>> I have a background macOS daemon process (aka Foundation-based "command
>>> line tool") that needs to write out a JPEG file to local disk. The image
>>> resides in an NSImage object (or alternatively, an NSData of raw RGB image
>>> data).
>>>
>>> Short of resorting to something like libjpeg, what is the ObjC way to do
>>> this?
>>>
>>> -Carl
>>>
>>> _______________________________________________
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>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Mon, 14 Jan 2019 14:48:15 -0700
>> From: Carl Hoefs <newsli...@autonomy.caltech.edu>
>> To: Vince DeMarco <dema...@apple.com>
>> Cc: Cocoa Developers <cocoa-dev@lists.apple.com>
>> Subject: Re: NSImage to JPEG file?
>> Message-ID:
>> <d46142b3-21d3-4944-9df0-a0a3003d8...@autonomy.caltech.edu>
>> Content-Type: text/plain; CHARSET=US-ASCII
>>
>> Got it working!
>> Thanks, that's the tip I needed.
>> -Carl
>>
>>
>>> On Jan 14, 2019, at 1:26 PM, Vince DeMarco <dema...@apple.com> wrote:
>>>
>>> Use ImageIO.
>>>
>>> create a CGImageDestinationRef and add the CGImage to it.
>>>
>>> Vince
>>>
>>>
>>>
>>>> On Jan 14, 2019, at 12:17 PM, Carl Hoefs <newsli...@autonomy.caltech.edu>
>>>> wrote:
>>>>
>>>> I have a background macOS daemon process (aka Foundation-based "command
>>>> line tool") that needs to write out a JPEG file to local disk. The image
>>>> resides in an NSImage object (or alternatively, an NSData of raw RGB image
>>>> data).
>>>>
>>>> Short of resorting to something like libjpeg, what is the ObjC way to do
>>>> this?
>>>>
>>>> -Carl
>>>>
>>>> _______________________________________________
>>>>
>>>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>>>>
>>>> Please do not post admin requests or moderator comments to the list.
>>>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
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>>>> https://lists.apple.com/mailman/options/cocoa-dev/demarco%40apple.com
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>>>> This email sent to dema...@apple.com
>>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Mon, 14 Jan 2019 16:06:54 -0600
>> From: Alex Zavatone <z...@mac.com>
>> To: Carl Hoefs <newsli...@autonomy.caltech.edu>
>> Cc: Cocoa Developers <cocoa-dev@lists.apple.com>
>> Subject: Re: NSImage to JPEG file?
>> Message-ID: <6e8e883e-245d-43ab-88eb-ba4cd0ed9...@mac.com>
>> Content-Type: text/plain; CHARSET=US-ASCII
>>
>> I will send you something.
>>
>> Sent from my iPhone
>>
>>> On Jan 14, 2019, at 2:17 PM, Carl Hoefs <newsli...@autonomy.caltech.edu>
>>> wrote:
>>>
>>> I have a background macOS daemon process (aka Foundation-based "command
>>> line tool") that needs to write out a JPEG file to local disk. The image
>>> resides in an NSImage object (or alternatively, an NSData of raw RGB image
>>> data).
>>>
>>> Short of resorting to something like libjpeg, what is the ObjC way to do
>>> this?
>>>
>>> -Carl
>>>
>>> _______________________________________________
>>>
>>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
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>>
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