Re: [PATCH] Frame large images with a small file size.

[Alexander Larsson <alexl redhat com>]

On Fri, 2004-12-17 at 17:00 +0100, Jaap Haitsma wrote:
> Alexander Larsson wrote:
> > On Thu, 2004-12-16 at 23:11 +0100, Jaap Haitsma wrote:
> > 
> >>>
> >>>Say I have an image on my desktop. The file is 500k, so its thumbnailed.
> >>>I didn't do anything to the icon, so its showed at 96 pixels size, from
> >>>the thumbnail.
> >>>
> >>>Now I select "Stretch Icon" from the menu and make the icon 200x200
> >>>pixels. If we continue to use the thumbnail for this it'll look pretty
> >>>fuzzy. What I would like is for it to switch to using the actual file as
> >>>the thumbnail for sizes > 128 pixels. This would make the icon look
> >>>crisp and nice.
> >>
> >>OK I got it, but if I zoom in the thumbnail size also gets larger then 
> >>128. Nautilus would become very slow for people using a high zoom level. :-(
> > 
> > 
> > I guess. Maybe we could first read the thumbnails and use those, and
> > then read the real files in the background while displaying the folder?
> > 
> It's an option but won't that look a bit funny first the image is fuzzy 
> and then after quite some CPU cycles they will get crisp? And people 
> using high zoom level will see a high cpu usage.

Why? This is quite similar to how thumbnailed files themselves look.
First they are icons, then they turn into images. I don't think people
using high zoom levels is all that common. Especially not for images,
its sort of useless since you don't see more information from the image
as you zoom. This would actually fix that.

> Another idea. Thumbnails could be saved in the size specified by the 
> app. All programs using thumbnails just read the thumbnail. If a 
> thumbnail is requested by an app it first reads the size of the preview. 
> If that size is large enough or within a certain range it will use that 
> one otherwise it creates a new thumbnail file.
> Option there of course is overwriting the old one or saving it to a new 
> file so that both sizes will be available.
> 
> What do you think about that?

I don't quite get it. I don't think we should be constantly re-
generating thumbnails like that. And creating thumbnails that aren't
shareable with other apps. I think highly zoomed icons is an uncommon
case that we could either just totally ignore (as we do now), or have
some special casing of.

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 Alexander Larsson                                            Red Hat, Inc 
                   alexl redhat com    alla lysator liu se 
He's a sword-wielding one-eyed Green Beret gone bad. She's a cosmopolitan 
hypochondriac hooker with the power to see death. They fight crime!