[Qgis-developer] WMS Design Problem and Mac Crash

[Magnus Homann]

Tim Sutton wrote:
> Hi
> 
> I support this idea. In fact it might work well with and idea I had
> some time ago for creating a caching and composition manager for QGIS.
> The idea being that when a scene is rendered and the extents havent
> changed (e.g. one layers visibility was toggled) the compoistion
> manager renders the layers directly from the cached copy rather then
> redrawing every aspect of the scene. In addition to that we can gain
> on performance by not rendering part of the scene that were rendered
> in the last draw event. For example if the user pans, we can just
> fetch the new area of the scene and stitch it onto the still visible
> parts of the last scene. 

I'm not sure this is the right place to discuss thsi, but it would be
good to have a way to dra partial rasters, that is no reading the entire
file into memory. Good for *huge* rasters and *very zoomed in* rasters.

See ticket #574.

Is this related in any way?

Magnus
-- 
Magnus Homann
magnus at homann.se
+46 702 399 558