Re: Interlaced jpegs; jump scrolling

Samuli Kärkkäinen wrote:
> 
> I recently updated to gqview 1.4.1 from pre-1.4 series. In contrast to
> the earlier versions, interlaced jpegs are now displayed such that
> first the coarser version is rendered on the screen, and then the
> detailed version. This appears to be much slower - at least on this 1.4
> GHz Celeron - than the former behaviour of not rendering the coarse
> version.

Progressive formats such as jpeg have always been handled this way. GQview
renders the data as it receives it. If upgrading from a gtk 1.2 based release of
GQview, chances are you are seeing gdk-pixbuf support progressive jpegs a little
"better".

Or, you are a victim of the slowness caused by loading an image while zoom is
not at 100%. If this is the case try enabling the "preload next image" option,
and "two pass zooming" (under the image tab in preferences) may help a bit too.

> I'd very much like it if the former behaviour could be restored, since
> th new behavior slows down picture browsing considerably.

Nothing has changed in this regard between GQView 1.2 and 1.4

> Another thing the older versions did better was file list scrolling. If
> I remember correctly, it did jump scrolling: when the cursor reached
> the end of the visible part of the list, the list was scrolled by half
> a screen or so. That was better than the current behaviour of scrolling
> only one line at a time, because it allowed seeing forward in the file
> list while browsing through it one picture at a time. For my needs,
> this is very important, as pictures are often in smallish groups when
> sorted alphabetically, and I usually only want to see one or two
> pictures of each group.

Should be a simple fix, added to the TODO list.


Greetings,
John

-- 
John Ellis <[email protected]>

http://gqview.sourceforge.net <GQview> | http://gqapplets.sourceforge.net
http://gqmpeg.sourceforge.net <GQmpeg> |                  <panel applets>


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