Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR tweaks tile load order mostly following #115
There is a bit of cleanup of names with
current_tiles => foreground_tiles
for clarity, but the main change is addingoffscreen
tiles as separate frombackground
tiles, and loading tiles background -> foreground -> offscreen.We usually want background tiles plotting first as they are low-resolution and can fill the view immediately. Foreground tiles load after that. Then offsecreen/halo tiles can load last after everything visible has loaded, to be ready for zooming and panning.
The other change is to make mouse-first loading work again, so the sweep of tile loading is less visible and the tile you want to look at loads first.