def render(self, layers, styles, bounds, size, **options):
self.map = DefaultMapContext(bounds.proj._crs)
self.map.setAreaOfInterest(bounds)
for i in range(len(layers)):
l = layers[i]
data = l._coverage if isinstance(l,Raster) else l._source
self.map.addLayer(DefaultMapLayer(data, styles[i]._style()))
w,h = (size[0], size[1])
hints = {}
hints [awt.RenderingHints.KEY_ANTIALIASING] = awt.RenderingHints.VALUE_ANTIALIAS_ON
renderer = StreamingRenderer()
renderer.setJava2DHints(awt.RenderingHints(hints))
renderer.setContext(self.map)
img = image.BufferedImage(w, h, image.BufferedImage.TYPE_INT_ARGB)
g = img.getGraphics()
g.setColor(style.Color(options["bgcolor"]).expr.value if options.has_key("bgcolor") else awt.Color.white)
g.fillRect(0, 0, w, h)
renderer.paint(g, awt.Rectangle(w,h), bounds)
return self._encode(img, g, size, **options)
