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render 257x257px tiles so they can overlap to avoid rendering bugs

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Laura Klünder 2017-10-30 21:25:56 +01:00
parent c62fe54893
commit 495cef1691
1 changed files with 4 additions and 0 deletions
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4
src/c3nav/mapdata/views.py
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@ -32,6 +32,10 @@ def tile(request, level, zoom, x, y, format):
maxx = minx + size maxx = minx + size
maxy = miny + size maxy = miny + size
# add one pixel so tiles can overlap to avoid rendering bugs in chrome or webkit
maxx += size / 256
miny -= size / 256
# error 404 if tiles is out of bounds # error 404 if tiles is out of bounds
bounds = Source.max_bounds() bounds = Source.max_bounds()
if not box(*chain(*bounds)).intersects(box(minx, miny, maxx, maxy)): if not box(*chain(*bounds)).intersects(box(minx, miny, maxx, maxy)):