def add_colorizer_stops(self, limits):
rcolors = colors.colormap.get(self.stylename)
if rcolors:
bins = self._rstore.linear(limits, k=len(rcolors))
symbolizer = self._symbolizer
for value, color in zip(bins, rcolors):
symbolizer.colorizer.add_stop(value, mapnik.Color(color))
def test_stylesheet(self):
m = carto.Map()
layer = m.layer(self.object, 'green')
layer._symbolizer.colorizer.default_color = mapnik.Color(0, 255, 0)
mapnik.save_map(m.map, str(m.mapfile))
form = forms.RasterTileForm(dict(self.ctx, style='green'))
r = renderers.MapnikRenderer()
imgdata = carto.build_map([self.object], form).render(r.format)
im = self._image(r.render(imgdata))
self.assertEqual(im.getpixel((100, 100)), (0, 255, 0, 255))
def symbolizer(self):
symbolizer = mapnik.RasterSymbolizer()
symbolizer.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_LINEAR,
mapnik.Color(0, 0, 0, 0))
return symbolizer
def add_colorizer_stops(self, bins, rcolors):
symbolizer = self._symbolizer
for value, color in zip(bins, rcolors):
symbolizer.colorizer.add_stop(value, mapnik.Color(color))