[Maposmatic-dev] [PATCH 2/2] multi-page: do not render pages outside the selected town

[Étienne Loks]

---
 ocitysmap2/layoutlib/multi_page_renderer.py |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/ocitysmap2/layoutlib/multi_page_renderer.py 
b/ocitysmap2/layoutlib/multi_page_renderer.py
index b1e6d67..a2b43d5 100644
--- a/ocitysmap2/layoutlib/multi_page_renderer.py
+++ b/ocitysmap2/layoutlib/multi_page_renderer.py
@@ -32,6 +32,7 @@ try:
     import mapnik2 as mapnik
 except ImportError:
     import mapnik
+import ogr
 import coords
 import locale
 import pangocairo
@@ -164,6 +165,7 @@ class MultiPageRenderer(Renderer):
         # Calculate all the bounding boxes that correspond to the
         # geographical area that will be rendered on each sheet of
         # paper.
+        area_polygon = ogr.CreateGeometryFromWkt(self.rc.polygon_wkt)
         bboxes = []
         for j in reversed(range(0, nb_pages_height)):
             for i in range(0, nb_pages_width):
@@ -177,9 +179,11 @@ class MultiPageRenderer(Renderer):
                                               cur_y + grayed_margin_merc_m,
                                               cur_x + usable_area_merc_m_width 
 - grayed_margin_merc_m,
                                               cur_y + 
usable_area_merc_m_height - grayed_margin_merc_m)
-
-                bboxes.append((self._inverse_envelope(envelope),
-                               self._inverse_envelope(envelope_inner)))
+                inner_bb = self._inverse_envelope(envelope_inner)
+                if not area_polygon.Disjoint(ogr.CreateGeometryFromWkt(
+                                                     inner_bb.as_wkt())):
+                    bboxes.append((self._inverse_envelope(envelope),
+                                   inner_bb))
 
         # Debug: show per-page bounding boxes as JS code
         # for i, (bb, bb_inner) in enumerate(bboxes):
-- 
1.7.9.1