Re: An alternative to gdk-pixbuf

On Sun, Sep 09, 2018 at 02:57:30AM +0200, Magnus Bergman wrote:
Many fields of science deal with images of multi
gigabyte sizes. Ideally any image viewer should be able to handle these
too with the right plugin (probably using GEGL in that case). But I
think the problem with large images (say 12000x12000 or so) is giving
it to the application as a pixmap. From my own tests it seams it's fine
at least as long as the images are no bigger than the screen. So if the
drawing (and implicitly also scaling) is handed over to the loading
library (which in turn might hand it over to the plugin), this problem
can be avoided.

Even if one does decode the entire full resolution image into a tiled
data structure (say, GeglBuffer), there's no need to create a Cairo
surface for the entire image at 1:1 zoom. All that's needed is a
surface to represent the visible area at the visible zoom. That's a
lot more manageable.

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