old_contents: # This file is part of the MapProxy project.
  # Copyright (C) 2010 Omniscale <http://omniscale.de>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
  Map/information sources for layers or tile cache.
  """
  
  from mapproxy.layer import (
      MapLayer, MapExtent, DefaultMapExtent, MapError, MapBBOXError, BlankImage, InfoLayer
  )
  from mapproxy.image.message import message_image
  from mapproxy.image.opts import ImageOptions
  from mapproxy.srs import SRS
  
  class SourceError(MapError):
      pass
  
  class SourceBBOXError(SourceError, MapBBOXError):
      pass
  
  class InvalidSourceQuery(SourceError):
      pass
  
  class InfoSource(InfoLayer):
      def get_info(self, query):
          raise NotImplementedError
  
  class LegendSource(object):
      def get_legend(self, query):
          raise NotImplementedError
  
  class DebugSource(MapLayer):
      def __init__(self):
          MapLayer.__init__(self)
          self.extent = DefaultMapExtent()
          self.res_range = None
  
      def get_map(self, query):
          bbox = query.bbox
          w = bbox[2] - bbox[0]
          h = bbox[3] - bbox[1]
          res_x = w/query.size[0]
          res_y = h/query.size[1]
          debug_info = "bbox: %r\nres: %.8f(%.8f)" % (bbox, res_x, res_y)
          return message_image(debug_info, size=query.size,
              image_opts=ImageOptions(transparent=True))
  
  class DummySource(MapLayer):
      supports_meta_tiles = True
  
      """
      Source that always returns a blank image.
  
      Used internally for 'offline' sources (e.g. seed_only).
      """
      def __init__(self, coverage=None):
          MapLayer.__init__(self)
          self.extent = MapExtent((-180, -90, 180, 90), SRS(4326))
          self.extent = MapExtent(coverage.bbox, coverage.srs) if coverage else DefaultMapExtent()
  
      def get_map(self, query):
          raise BlankImage()
  
new_contents: # This file is part of the MapProxy project.
  # Copyright (C) 2010 Omniscale <http://omniscale.de>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
  Map/information sources for layers or tile cache.
  """
  
  from mapproxy.layer import (
      MapLayer, MapExtent, DefaultMapExtent, MapError, MapBBOXError, BlankImage, InfoLayer
  )
  from mapproxy.image.message import message_image
  from mapproxy.image.opts import ImageOptions
  from mapproxy.srs import SRS
  
  class SourceError(MapError):
      pass
  
  class SourceBBOXError(SourceError, MapBBOXError):
      pass
  
  class InvalidSourceQuery(SourceError):
      pass
  
  class InfoSource(InfoLayer):
      def get_info(self, query):
          raise NotImplementedError
  
  class LegendSource(object):
      def get_legend(self, query):
          raise NotImplementedError
  
  class DebugSource(MapLayer):
      def __init__(self):
          MapLayer.__init__(self)
          self.extent = DefaultMapExtent()
          self.res_range = None
  
      def get_map(self, query):
          bbox = query.bbox
          w = bbox[2] - bbox[0]
          h = bbox[3] - bbox[1]
          res_x = w/query.size[0]
          res_y = h/query.size[1]
          debug_info = "bbox: %r\nres: %.8f(%.8f)" % (bbox, res_x, res_y)
          return message_image(debug_info, size=query.size,
              image_opts=ImageOptions(transparent=True))
  
  class DummySource(MapLayer):
      supports_meta_tiles = True
  
      """
      Source that always returns a blank image.
  
      Used internally for 'offline' sources (e.g. seed_only).
      """
      def __init__(self, coverage=None):
          MapLayer.__init__(self)
          self.image_opts.transparent = True
          self.extent = MapExtent((-180, -90, 180, 90), SRS(4326))
          self.extent = MapExtent(coverage.bbox, coverage.srs) if coverage else DefaultMapExtent()
  
      def get_map(self, query):
          raise BlankImage()
  
subject: fix transparency for dummy source