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Re: Fast image loading + scrolling like iPhoto

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Re: Fast image loading + scrolling like iPhoto

Subject: Re: Fast image loading + scrolling like iPhoto
From: Tim Lucas <email@hidden>
Date: Thu, 6 Jan 2005 14:08:38 +1100

On 06/01/2005, at 3:16 AM, Ricky Sharp wrote:

I believe iPhoto uses OpenGL. During scrolling, output quality is decreased so that rendering time is greatly reduced. It's probably some trick with textures. Someone that actually has dealt with OpenGL (I never have myself) will know for sure.

Introspecting the View with F-Script Anywhere shows the following class heirarchy: PhotoViewer : ArchiveDisplay : NSControl

and the following view heirarchy: PhotoViewer -> NSClipView -> NSView -> BeveledBox -> NSView -> NSBox -> OurSplitView -> NSView -> NSView -> NSGrayFrame

so nope... no OpenGL in site.

PhotoViewer has notification methods "networkImageLoadedNotification", "hiResLoadedNotification" and a method "preloadHighRes" so I'm guessing the loading happens in separate threads...

- tim lucas

http://www.toolmantim.com

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References:  
  >Fast image loading + scrolling like iPhoto (From: Florian Soenens <email@hidden>)
  >Re: Fast image loading + scrolling like iPhoto (From: Ricky Sharp <email@hidden>)




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