def fetch_render(self, zoom_level, x, y, render_info, extent, label_geoms,
layers):
if ((render_info.min_zoom != None
and render_info.min_zoom > zoom_level)
or (render_info.max_zoom != None
and render_info.max_zoom < zoom_level)):
return None
storage_manager = render_info.storage_manager
renderer = render_info.renderer
cutter = render_info.cutter
try:
result = storage_manager.fetch(zoom_level, x, y)
if (render_info.name in layers):
return result
return None
except tiletree.TileNotFoundException:
bbox = tiletree.tile_coord_to_bbox(zoom_level, x, y, extent)
geom = cutter.cut(bbox[0], bbox[1], bbox[2], bbox[3])
node = tiletree.QuadTreeGenNode(None,
bbox[0],
bbox[1],
bbox[2],
bbox[3],
zoom_level,
None,
geom=geom,
tile_x=x,
tile_y=y,
label_geoms=label_geoms[0])
renderer.tile_info(node, check_full=render_info.check_full)
img_bytes = renderer.render(node)[1]
storage_manager.store(node, img_bytes)
label_geoms[0] = node.label_geoms
if (render_info.name in layers):
return StringIO.StringIO(img_bytes.getvalue())
return None
def fetch_render(self, zoom_level, x, y, render_info, extent, label_geoms, layers): if((render_info.min_zoom != None and render_info.min_zoom > zoom_level) or (render_info.max_zoom != None and render_info.max_zoom < zoom_level) ): return None storage_manager = render_info.storage_manager renderer = render_info.renderer cutter = render_info.cutter try: result = storage_manager.fetch(zoom_level, x, y) if(render_info.name in layers): return result return None except tiletree.TileNotFoundException: bbox = tiletree.tile_coord_to_bbox(zoom_level, x, y, extent) geom = cutter.cut(bbox[0], bbox[1], bbox[2], bbox[3]) node = tiletree.QuadTreeGenNode(None, bbox[0], bbox[1], bbox[2], bbox[3], zoom_level, None, geom=geom, tile_x=x, tile_y=y, label_geoms=label_geoms[0]) renderer.tile_info(node, check_full=render_info.check_full) img_bytes = renderer.render(node)[1] storage_manager.store(node, img_bytes) label_geoms[0] = node.label_geoms if(render_info.name in layers): return StringIO.StringIO(img_bytes.getvalue()) return None
def create_machine_jobs(global_config):
dist_render_config = global_config['dist_render']
#override parameteres with render_extent if necessary
render_extent = global_config['map_extent']
if ('render_extent' in dist_render_config):
render_extent = dist_render_config['render_extent']
tile_coords = tiletree.extent_to_tile_coord(
render_extent, global_config['map_extent'])
print 'Root Tile Coordinate:', tile_coords
dist_render_config['start_zoom'] = tile_coords[0]
dist_render_config['start_tile_x'] = tile_coords[1]
dist_render_config['start_tile_y'] = tile_coords[2]
#get the extent of the root node
render_extent = tiletree.tile_coord_to_bbox(
tile_coords[0], tile_coords[1], tile_coords[2],
global_config['map_extent'])
total_num_threads = sum(x['num_threads']
for x in dist_render_config['render_nodes'])
min_num_jobs = dist_render_config.get('min_num_jobs', 1)
if (total_num_threads > min_num_jobs):
min_num_jobs = total_num_threads
map_extent = global_config['map_extent']
jobs = split_bbox(min_num_jobs, dist_render_config['start_zoom'],
dist_render_config['start_tile_x'],
dist_render_config['start_tile_y'],
dist_render_config['stop_zoom'], *render_extent)
fill_to_zoom_level = jobs[0].zoom_level - 1
jobs_per_thread = int(math.ceil(len(jobs) / float(total_num_threads)))
render_node_configs = {}
for render_node in dist_render_config['render_nodes']:
this_num_jobs = min(jobs_per_thread * render_node['num_threads'],
len(jobs))
#inherit the stuff from the global config
this_config = copy.copy(global_config)
this_config.update({
'address': render_node['address'],
'num_threads': render_node['num_threads'],
'jobs': []
})
for job in jobs[0:this_num_jobs]:
this_config['jobs'].append({
'extent': [job.min_x, job.min_y, job.max_x, job.max_y],
'start_zoom':
job.zoom_level,
'stop_zoom':
dist_render_config['stop_zoom'],
'tile_x':
job.tile_x,
'tile_y':
job.tile_y,
})
del jobs[0:this_num_jobs]
render_node_configs[render_node['address']] = this_config
#add in any left over bits at the top of the tree
if (fill_to_zoom_level >= dist_render_config['start_zoom']):
render_node_configs.values()[0]['jobs'].append({
'extent':
render_extent,
'start_zoom':
dist_render_config['start_zoom'],
'stop_zoom':
fill_to_zoom_level,
'tile_x':
dist_render_config['start_tile_x'],
'tile_y':
dist_render_config['start_tile_y'],
})
#print json.dumps(render_node_configs)
return render_node_configs
def create_machine_jobs(global_config):
dist_render_config = global_config['dist_render']
#override parameteres with render_extent if necessary
render_extent = global_config['map_extent']
if('render_extent' in dist_render_config):
render_extent = dist_render_config['render_extent']
tile_coords = tiletree.extent_to_tile_coord(render_extent, global_config['map_extent'])
print 'Root Tile Coordinate:', tile_coords
dist_render_config['start_zoom'] = tile_coords[0]
dist_render_config['start_tile_x'] = tile_coords[1]
dist_render_config['start_tile_y'] = tile_coords[2]
#get the extent of the root node
render_extent = tiletree.tile_coord_to_bbox(tile_coords[0], tile_coords[1], tile_coords[2],
global_config['map_extent'])
total_num_threads = sum(x['num_threads'] for x in dist_render_config['render_nodes'])
min_num_jobs = dist_render_config.get('min_num_jobs', 1)
if(total_num_threads > min_num_jobs):
min_num_jobs = total_num_threads
map_extent = global_config['map_extent']
jobs = split_bbox(min_num_jobs, dist_render_config['start_zoom'],
dist_render_config['start_tile_x'], dist_render_config['start_tile_y'],
dist_render_config['stop_zoom'], *render_extent)
fill_to_zoom_level = jobs[0].zoom_level - 1
jobs_per_thread = int(math.ceil(len(jobs) / float(total_num_threads)))
render_node_configs = {}
for render_node in dist_render_config['render_nodes']:
this_num_jobs = min(jobs_per_thread * render_node['num_threads'], len(jobs))
#inherit the stuff from the global config
this_config = copy.copy(global_config)
this_config.update({
'address': render_node['address'],
'num_threads': render_node['num_threads'],
'jobs': []
})
for job in jobs[0:this_num_jobs]:
this_config['jobs'].append({
'extent': [job.min_x, job.min_y, job.max_x, job.max_y],
'start_zoom': job.zoom_level,
'stop_zoom': dist_render_config['stop_zoom'],
'tile_x':job.tile_x,
'tile_y':job.tile_y,
})
del jobs[0:this_num_jobs]
render_node_configs[render_node['address']] = this_config
#add in any left over bits at the top of the tree
if(fill_to_zoom_level >= dist_render_config['start_zoom']):
render_node_configs.values()[0]['jobs'].append({
'extent': render_extent,
'start_zoom': dist_render_config['start_zoom'],
'stop_zoom': fill_to_zoom_level,
'tile_x': dist_render_config['start_tile_x'],
'tile_y': dist_render_config['start_tile_y'],
})
#print json.dumps(render_node_configs)
return render_node_configs
