Re: Is QuickLook implemented upon CGImage or CGImageSource under the hood?
Re: Is QuickLook implemented upon CGImage or CGImageSource under the hood?
- Subject: Re: Is QuickLook implemented upon CGImage or CGImageSource under the hood?
- From: Mike Abdullah <email@hidden>
- Date: Fri, 07 Sep 2012 12:09:57 +0100
Your question in the subject makes little sense. CGImageSource is a means to create CGImages. Quick Look likely uses both therefore.
Ultimately, you need to test different image loading routes to see which suits your needs.
CGImageSourceCreateImageAtIndex
Generates full-size images as fast as it can
QLThumbnailImageCreate
Generates thumbnails
Might have the thumbnail already cached for speed
Is going to spend a little time in cross-process communication
Logs warnings if used on the main thread in my experience
Can handle any file type, not just images
CGImageSourceCreateThumbnailAtIndex
Generates thumbnails
Very fast
On 7 Sep 2012, at 10:21, Oleg Krupnov <email@hidden> wrote:
> And what is the fastest method for image loading,
> QLThumbnailImageCreate or CGImageSourceCreateImageAtIndex?
>
> Thanks!
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