def __init__(self, params, figureOptions, layerInfoList):
"""
@param params: request parameters
@param figureOptions: overall options for the figure
@param layerInfoList: list of LayerInfo defining layers to include in the figure
"""
self.layerInfoList = layerInfoList
figureStyle = figureOptions.style
if figureStyle not in self.METADATA_IMAGE_BUILDERS.keys():
log.warn("Invalid figure type requested: %s" % figureStyle)
figureStyle = 'default'
self.metadataBuilder = self.METADATA_IMAGE_BUILDERS[figureStyle](params)
self.legendBuilder = LegendImageBuilder()
class FigureBuilder(object):
"""Builds the complete figure from the map image and metadata.
"""
# Metadata image builder classes for each figure style
METADATA_IMAGE_BUILDERS = {
'default': ViewdataMetadataImageBuilder,
'ipcc-ddc': IpccDdcMetadataImageBuilder,
'viewdata': ViewdataMetadataImageBuilder,
'wmsviz': WmsvizMetadataImageBuilder}
def __init__(self, params, figureOptions, layerInfoList):
"""
@param params: request parameters
@param figureOptions: overall options for the figure
@param layerInfoList: list of LayerInfo defining layers to include in the figure
"""
self.layerInfoList = layerInfoList
figureStyle = figureOptions.style
if figureStyle not in self.METADATA_IMAGE_BUILDERS.keys():
log.warn("Invalid figure type requested: %s" % figureStyle)
figureStyle = 'default'
self.metadataBuilder = self.METADATA_IMAGE_BUILDERS[figureStyle](params)
self.legendBuilder = LegendImageBuilder()
def buildImage(self, mapImage, points):
'''
Builds a composite image of the metadata, map and legends
@param mapImage: the image of the map
@type mapImage: PIL Image
@param points: the points on the map that locate the four corners
(this is excluding the labels)
@type points: 4-tuple
'''
log.debug("mapImage.size = %s" % (mapImage.size,))
metadataImage = self.metadataBuilder.buildMetadataImage(self.layerInfoList,
mapImage.size[0])
metadataImageHeight = metadataImage.size[1]
log.debug("metadataImageHeight %d" % metadataImageHeight)
legendImage = self.legendBuilder.buildLegendImage(self.layerInfoList,
mapImage.size[0])
legendImageHeight = legendImage.size[1]
log.debug("legendImage.size = %s" % (legendImage.size,))
log.debug("metadataImage.size = %s" % (metadataImage.size,))
if hasattr(self.metadataBuilder, 'buildDetailsImage'):
detailsImage = self.metadataBuilder.buildDetailsImage(self.layerInfoList,
mapImage.size[0])
log.debug("detailsImage.size = %s" % (detailsImage.size,))
detailsImageHeight = detailsImage.size[1]
else:
detailsImage = None
detailsImageHeight = 0
mapImageHeight = mapImage.size[1]
log.debug("mapImageHeight %d" % mapImageHeight)
(metadataSpace, legendSpace, detailsSpace) = self.metadataBuilder.getFigureSpacings()
log.debug("metadataSpace %d" % metadataSpace)
# if the top of the map is a long way from the top of the map image then
# we can overlay the metadata and legend images slightly.
log.debug("points = %s" % (points,))
(left, bottom, right, top) = points
# Allow space for frame, axes and labels.
mapTopOffset = 10
mapBottomOffset = 50
topOverlap = mapImageHeight - top - metadataSpace - mapTopOffset
if topOverlap < 0:
topOverlap = 0
bottomOverlap = bottom - legendSpace - mapBottomOffset
if bottomOverlap < 0:
bottomOverlap = 0
log.debug("topOverlap = %s, bottomOverlap = %s" % (topOverlap, bottomOverlap,))
compositeIm = Image.new('RGBA',
(mapImage.size[0],
(metadataImageHeight + mapImageHeight + legendImageHeight +
detailsImageHeight - topOverlap - bottomOverlap)))
detailsBox = (0,
metadataImageHeight + mapImageHeight + legendImageHeight - topOverlap - bottomOverlap,
legendImage.size[0],
metadataImageHeight + mapImageHeight + legendImageHeight + detailsImageHeight - topOverlap - bottomOverlap)
legendBox = (0, metadataImageHeight + mapImageHeight - topOverlap - bottomOverlap,
legendImage.size[0], metadataImageHeight + mapImageHeight + legendImageHeight - topOverlap - bottomOverlap)
mapBox = (0, metadataImageHeight - topOverlap,
mapImage.size[0], mapImageHeight + metadataImageHeight - topOverlap)
metadataBox = (0, 0, metadataImage.size[0], metadataImageHeight)
compositeIm.paste(mapImage, mapBox)
compositeIm.paste(metadataImage, metadataBox)
compositeIm.paste(legendImage, legendBox)
if detailsImage:
compositeIm.paste(detailsImage, detailsBox)
return compositeIm