Re: [Gimp-developer] Re: [Gimp-user] Environment settings big images

2004-04-23 Thread Sven Neumann
Hi,

David Neary [EMAIL PROTECTED] writes:

  Photoshop handles large images better than GIMP. That's a known
  fact and it's not trivial to improve.
 
 How, exactly? I've heard this too, but I have no clear idea how
 they do so - do they have a similar caching system, and just make
 better decisions about what to cache and when? Or do they use OS
 specific features to reduce read times for caching operations?

AFAIK they don't load the full image into memory. If you open a large
image, only the preview is loaded and if you zoom in, then only the
necessary parts are pulled into memory. Of course this doesn't work
with all file formats.


Sven
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Re: [Gimp-developer] Re: [Gimp-user] Environment settings big images

2004-04-23 Thread Nathan Carl Summers
On 23 Apr 2004, Sven Neumann wrote:

 Hi,

 David Neary [EMAIL PROTECTED] writes:

   Photoshop handles large images better than GIMP. That's a known
   fact and it's not trivial to improve.
 
  How, exactly?

 AFAIK they don't load the full image into memory. If you open a large
 image, only the preview is loaded and if you zoom in, then only the
 necessary parts are pulled into memory. Of course this doesn't work
 with all file formats.

There are already bugzilla entries about this -- most prominantly #107246.
I have a feeling to do this right it would have to be a fairly
sophisticated GEGL node.  Why aren't I on gegl-developer again?  :)

Rockwalrus

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