import os import subprocess import xml.etree.ElementTree as ET from django.conf import settings from django.db.models import Max, Min from shapely.affinity import scale from shapely.geometry import JOIN_STYLE, box from c3nav.mapdata.models import Package def get_render_path(filename): return os.path.join(settings.RENDER_ROOT, filename) def get_dimensions(): aggregate = Package.objects.all().aggregate(Max('right'), Min('left'), Max('top'), Min('bottom')) return ( float(aggregate['right__max'] - aggregate['left__min']), float(aggregate['top__max'] - aggregate['bottom__min']), ) class LevelRenderer(): def __init__(self, level, only_public): self.level = level self.only_public = only_public self.geometries = self.get_geometries(level) def get_geometries(self, level): return level.public_geometries if self.only_public else level.geometries def get_filename(self, mode, filetype, level=None): return get_render_path('%s%s-level-%s.%s' % (('public-' if self.only_public else ''), mode, (self.level.name if level is None else level), filetype)) @staticmethod def get_dimensions(): width, height = get_dimensions() return (width * settings.RENDER_SCALE, height * settings.RENDER_SCALE) @staticmethod def polygon_svg(geometry, fill_color=None, fill_opacity=None, stroke_width=0.0, stroke_color=None, stroke_opacity=None): scaled = scale(geometry, xfact=settings.RENDER_SCALE, yfact=settings.RENDER_SCALE, origin=(0, 0)) element = ET.fromstring(scaled.svg(0, fill_color or '#FFFFFF')) if element.tag != 'g': new_element = ET.Element('g') new_element.append(element) element = new_element paths = element.findall('polyline') if len(paths) == 0: paths = element.findall('path') for path in paths: path.attrib.pop('opacity') path.set('stroke-width', str(stroke_width * settings.RENDER_SCALE)) if fill_color is None and 'fill' in path.attrib: path.attrib.pop('fill') path.set('fill-opacity', '0') if fill_opacity is not None: path.set('fill-opacity', str(fill_opacity)) if stroke_color is not None: path.set('stroke', stroke_color) elif 'stroke' in path.attrib: path.attrib.pop('stroke') if stroke_opacity is not None: path.set('stroke-opacity', str(stroke_opacity)) return element def create_svg(self): width, height = self.get_dimensions() svg = ET.Element('svg', { 'width': str(width), 'height': str(height), 'xmlns:svg': 'http://www.w3.org/2000/svg', 'xmlns': 'http://www.w3.org/2000/svg', 'xmlns:xlink': 'http://www.w3.org/1999/xlink', }) return svg def add_svg_content(self, svg): width, height = self.get_dimensions() contents = ET.Element('g', { 'transform': 'scale(1 -1) translate(0 -%d)' % (height), }) svg.append(contents) return contents def add_svg_image(self, svg, image): width, height = self.get_dimensions() contents = ET.Element('image', { 'x': '0', 'y': '0', 'width': str(width), 'height': str(height), 'xlink:href': image }) svg.append(contents) def render_base(self, png=True, show_accessibles=False): svg = self.create_svg() contents = self.add_svg_content(svg) MITRE = JOIN_STYLE.mitre if not self.level.intermediate: width, height = get_dimensions() holes = self.geometries.holes.buffer(0.1, join_style=MITRE) contents.append(self.polygon_svg(box(0, 0, width, height).difference(holes), fill_color='#000000')) contents.append(self.polygon_svg(self.geometries.buildings_with_holes, fill_color='#D5D5D5')) contents.append(self.polygon_svg(self.geometries.outsides_with_holes, fill_color='#DCE6DC')) contents.append(self.polygon_svg(self.geometries.stair_areas, fill_color='#000000', fill_opacity=0.03)) contents.append(self.polygon_svg(self.geometries.stairs, stroke_color='#000000', stroke_width=0.06, stroke_opacity=0.2)) contents.append(self.polygon_svg(self.geometries.walls_shadow, fill_color='#000000', fill_opacity=0.06)) if show_accessibles: narrowed_geometry = self.geometries.accessible.buffer(-0.6, join_style=MITRE) clear_geometry = self.geometries.accessible.buffer(-0.3, join_style=JOIN_STYLE.mitre) wide_geometry = narrowed_geometry.buffer(0.31, join_style=MITRE).intersection(clear_geometry) missing_geometry = clear_geometry.difference(wide_geometry.buffer(0.01, join_style=MITRE)) contents.append(self.polygon_svg(clear_geometry, fill_color='#FFFF00', fill_opacity=0.5)) contents.append(self.polygon_svg(narrowed_geometry, fill_color='#009900', fill_opacity=0.5)) contents.append(self.polygon_svg(missing_geometry, fill_color='#FF9900', fill_opacity=0.5)) contents.append(self.polygon_svg(self.geometries.elevatorlevels, fill_color='#9EF8FB')) contents.append(self.polygon_svg(self.geometries.doors, fill_color='#FFFFFF', stroke_color='#3c3c3c', stroke_width=0.05)) contents.append(self.polygon_svg(self.geometries.uncropped_obstacles, fill_color='#BDBDBD', stroke_color='#9E9E9E', stroke_width=0.05)) contents.append(self.polygon_svg(self.geometries.cropped_obstacles.buffer(-0.06, join_style=MITRE), fill_color='#BDBDBD', stroke_color='#9E9E9E', stroke_width=0.05)) contents.append(self.polygon_svg(self.geometries.walls, fill_color='#949494', stroke_color='#3c3c3c', stroke_width=0.05)) filename = self.get_filename('base', 'svg') with open(filename, 'w') as f: f.write(ET.tostring(svg).decode()) if png: png_filename = self.get_filename('base', 'png') subprocess.call(['rsvg-convert', filename, '-o', png_filename]) def render_simple(self, png=True): svg = self.create_svg() dark_lower = [] lower = [] for level in self.level.lower(): lower.append(level) if not level.intermediate: dark_lower.extend(lower) lower = [] lower.append(self.level) width, height = get_dimensions() contents = self.add_svg_content(svg) contents.append(self.polygon_svg(box(0, 0, width, height), fill_color='#000000')) for level in dark_lower: self.add_svg_image(svg, 'file://'+self.get_filename('base', 'png', level=level)) contents = self.add_svg_content(svg) contents.append(self.polygon_svg(box(0, 0, width, height), fill_color='#000000', fill_opacity=0.1)) for level in lower: self.add_svg_image(svg, 'file://'+self.get_filename('base', 'png', level=level)) filename = self.get_filename('simple', 'svg') with open(filename, 'w') as f: f.write(ET.tostring(svg).decode()) if png: png_filename = self.get_filename('simple', 'png') subprocess.call(['rsvg-convert', filename, '-o', png_filename]) def render_full(self, png=True): svg = self.create_svg() self.add_svg_image(svg, 'file://' + self.get_filename('simple', 'png')) higher = [] for level in self.level.higher(): if not level.intermediate: break higher.append(level) contents = self.add_svg_content(svg) for level in higher: contents.append(self.polygon_svg(self.get_geometries(level).intermediate_shadows, fill_color='#000000', fill_opacity=0.07)) for level in higher: self.add_svg_image(svg, 'file://'+self.get_filename('base', 'png', level=level)) filename = self.get_filename('full', 'svg') with open(filename, 'w') as f: f.write(ET.tostring(svg).decode()) if png: png_filename = self.get_filename('full', 'png') subprocess.call(['rsvg-convert', filename, '-o', png_filename])