def __init__(self, db, rc, tmpdir, dpi, file_prefix, index_position="side"):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
# Prepare the index
self.street_index = StreetIndex(db, rc.polygon_wkt, rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self._grid_legend_margin_pt = min(
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt,
)
self._title_margin_pt = 0.05 * self.paper_height_pt
self._copyright_margin_pt = 0.02 * self.paper_height_pt
self._usable_area_width_pt = self.paper_width_pt - 2 * Renderer.PRINT_SAFE_MARGIN_PT
self._usable_area_height_pt = self.paper_height_pt - (
2 * Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt + self._copyright_margin_pt
)
# Prepare the Index (may raise a IndexDoesNotFitError)
if index_position and self.street_index and self.street_index.categories:
self._index_renderer, self._index_area = self._create_index_rendering(index_position == "side")
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area:
# No index displayed
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
self._usable_area_width_pt,
self._usable_area_height_pt,
)
elif index_position == "side":
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
(self._usable_area_width_pt - self._index_area.w),
self._usable_area_height_pt,
)
else:
# Index on the left -> map on the right
self._map_coords = (
self._index_area.x + self._index_area.w,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
(self._usable_area_width_pt - self._index_area.w),
self._usable_area_height_pt,
)
elif index_position == "bottom":
# Index present, displayed at the bottom -> map on top
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
self._usable_area_width_pt,
(self._usable_area_height_pt - self._index_area.h),
)
else:
raise AssertionError("Invalid index position %s" % repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), float(self._map_coords[3]), dpi, rc.osmid is not None # W # H
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare the grid
self.grid = self._create_grid(self._map_canvas, dpi)
# Update the street_index to reflect the grid's actual position
if self.grid and self.street_index:
self.street_index.apply_grid(self.grid)
# Dump the CSV street index
if self.street_index:
self.street_index.write_to_csv(rc.title, "%s.csv" % file_prefix)
# Commit the internal rendering stack of the map
self._map_canvas.render()
if self.rc.overlay:
self._overlay_canvas.render()
def __init__(self, db, rc, tmpdir, dpi, file_prefix,
index_position = 'side'):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
# Prepare the index
self.street_index = StreetIndex(db,
rc.polygon_wkt,
rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
self._title_margin_pt = 0.05 * self.paper_height_pt
self._copyright_margin_pt = 0.02 * self.paper_height_pt
self._usable_area_width_pt = (self.paper_width_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT +
self._title_margin_pt +
self._copyright_margin_pt))
# Prepare the Index (may raise a IndexDoesNotFitError)
if ( index_position and self.street_index
and self.street_index.categories ):
self._index_renderer, self._index_area \
= self._create_index_rendering(index_position == "side")
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area:
# No index displayed
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
self._usable_area_height_pt )
elif index_position == 'side':
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
else:
# Index on the left -> map on the right
self._map_coords = ( self._index_area.x + self._index_area.w,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
elif index_position == 'bottom':
# Index present, displayed at the bottom -> map on top
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
( self._usable_area_height_pt
- self._index_area.h ) )
else:
raise AssertionError("Invalid index position %s"
% repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi )
# Prepare the grid
self.grid = self._create_grid(self._map_canvas)
# Update the street_index to reflect the grid's actual position
if self.grid and self.street_index:
self.street_index.apply_grid(self.grid)
# Dump the CSV street index
if self.street_index:
self.street_index.write_to_csv(rc.title, '%s.csv' % file_prefix)
# Commit the internal rendering stack of the map
self._map_canvas.render()
class SinglePageRenderer(Renderer):
"""
This Renderer creates a full-page map, with the overlayed features
like the grid, grid labels, scale and compass rose and can draw an
index.
"""
name = "generic_single_page"
description = "A generic full-page layout with or without index."
MAX_INDEX_OCCUPATION_RATIO = 1 / 3.0
def __init__(self, db, rc, tmpdir, dpi, file_prefix, index_position="side"):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
# Prepare the index
self.street_index = StreetIndex(db, rc.polygon_wkt, rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self._grid_legend_margin_pt = min(
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt,
)
self._title_margin_pt = 0.05 * self.paper_height_pt
self._copyright_margin_pt = 0.02 * self.paper_height_pt
self._usable_area_width_pt = self.paper_width_pt - 2 * Renderer.PRINT_SAFE_MARGIN_PT
self._usable_area_height_pt = self.paper_height_pt - (
2 * Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt + self._copyright_margin_pt
)
# Prepare the Index (may raise a IndexDoesNotFitError)
if index_position and self.street_index and self.street_index.categories:
self._index_renderer, self._index_area = self._create_index_rendering(index_position == "side")
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area:
# No index displayed
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
self._usable_area_width_pt,
self._usable_area_height_pt,
)
elif index_position == "side":
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
(self._usable_area_width_pt - self._index_area.w),
self._usable_area_height_pt,
)
else:
# Index on the left -> map on the right
self._map_coords = (
self._index_area.x + self._index_area.w,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
(self._usable_area_width_pt - self._index_area.w),
self._usable_area_height_pt,
)
elif index_position == "bottom":
# Index present, displayed at the bottom -> map on top
self._map_coords = (
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
self._usable_area_width_pt,
(self._usable_area_height_pt - self._index_area.h),
)
else:
raise AssertionError("Invalid index position %s" % repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), float(self._map_coords[3]), dpi, rc.osmid is not None # W # H
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare map overlay
if self.rc.overlay:
self._overlay_canvas = MapCanvas(
self.rc.overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
)
# Prepare the grid
self.grid = self._create_grid(self._map_canvas, dpi)
# Update the street_index to reflect the grid's actual position
if self.grid and self.street_index:
self.street_index.apply_grid(self.grid)
# Dump the CSV street index
if self.street_index:
self.street_index.write_to_csv(rc.title, "%s.csv" % file_prefix)
# Commit the internal rendering stack of the map
self._map_canvas.render()
if self.rc.overlay:
self._overlay_canvas.render()
def _create_index_rendering(self, on_the_side):
"""
Prepare to render the Street index.
Args:
on_the_side (bool): True=index on the side, False=at bottom.
Return a couple (StreetIndexRenderer, StreetIndexRenderingArea).
"""
# Now we determine the actual occupation of the index
index_renderer = StreetIndexRenderer(self.rc.i18n, self.street_index.categories)
# We use a fake vector device to determine the actual
# rendering characteristics
fake_surface = cairo.PDFSurface(None, self.paper_width_pt, self.paper_height_pt)
if on_the_side:
index_max_width_pt = self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_width_pt
if not self.rc.i18n.isrtl():
# non-RTL: Index is on the right
index_area = index_renderer.precompute_occupation_area(
fake_surface,
(self.paper_width_pt - Renderer.PRINT_SAFE_MARGIN_PT - index_max_width_pt),
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
index_max_width_pt,
self._usable_area_height_pt,
"width",
"right",
)
else:
# RTL: Index is on the left
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
(Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt),
index_max_width_pt,
self._usable_area_height_pt,
"width",
"left",
)
else:
# Index at the bottom of the page
index_max_height_pt = self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_height_pt
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
(
self.paper_height_pt
- Renderer.PRINT_SAFE_MARGIN_PT
- self._copyright_margin_pt
- index_max_height_pt
),
self._usable_area_width_pt,
index_max_height_pt,
"height",
"bottom",
)
return index_renderer, index_area
def _draw_title(self, ctx, w_dots, h_dots, font_face):
"""
Draw the title at the current position inside a
w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units)
font_face (str): Pango font specification.
"""
# Title background
ctx.save()
ctx.set_source_rgb(0.8, 0.9, 0.96)
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.fill()
ctx.restore()
# Retrieve and paint the OSM logo
ctx.save()
grp, logo_width = self._get_osm_logo(ctx, 0.8 * h_dots)
if grp:
ctx.translate(w_dots - logo_width - 0.1 * h_dots, 0.1 * h_dots)
ctx.set_source(grp)
ctx.paint_with_alpha(0.5)
else:
LOG.warning("OSM Logo not available.")
logo_width = 0
ctx.restore()
# Prepare the title
pc = pangocairo.CairoContext(ctx)
layout = pc.create_layout()
layout.set_width(int((w_dots - 0.1 * w_dots - logo_width) * pango.SCALE))
if not self.rc.i18n.isrtl():
layout.set_alignment(pango.ALIGN_LEFT)
else:
layout.set_alignment(pango.ALIGN_RIGHT)
fd = pango.FontDescription(font_face)
fd.set_size(pango.SCALE)
layout.set_font_description(fd)
layout.set_text(self.rc.title)
draw_utils.adjust_font_size(layout, fd, layout.get_width(), 0.8 * h_dots)
# Draw the title
ctx.save()
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.stroke()
ctx.translate(0.1 * h_dots, (h_dots - (layout.get_size()[1] / pango.SCALE)) / 2.0)
pc.show_layout(layout)
ctx.restore()
def _draw_copyright_notice(self, ctx, w_dots, h_dots, notice=None, osm_date=None):
"""
Draw a copyright notice at current location and within the
given w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units).
font_face (str): Pango font specification.
notice (str): Optional notice to replace the default.
"""
today = datetime.date.today()
notice = notice or _(
u"Copyright © %(year)d MapOSMatic/OCitySMap developers. "
u"Map data © %(year)d OpenStreetMap.org "
u"and contributors (cc-by-sa).\n"
u"Map rendered on: %(date)s. OSM data updated on: %(osmdate)s. "
u"The map may be incomplete or inaccurate. "
u"You can contribute to improve this map. "
u"See http://wiki.openstreetmap.org"
)
# We need the correct locale to be set for strftime().
prev_locale = locale.getlocale(locale.LC_TIME)
locale.setlocale(locale.LC_TIME, self.rc.i18n.language_code())
try:
if osm_date is None:
osm_date_str = _(u"unknown")
else:
osm_date_str = osm_date.strftime("%d %B %Y %H:%M")
notice = notice % {"year": today.year, "date": today.strftime("%d %B %Y"), "osmdate": osm_date_str}
finally:
locale.setlocale(locale.LC_TIME, prev_locale)
ctx.save()
pc = pangocairo.CairoContext(ctx)
fd = pango.FontDescription("DejaVu")
fd.set_size(pango.SCALE)
layout = pc.create_layout()
layout.set_font_description(fd)
layout.set_text(notice)
draw_utils.adjust_font_size(layout, fd, w_dots, h_dots)
pc.show_layout(layout)
ctx.restore()
def render(self, cairo_surface, dpi, osm_date):
"""Renders the map, the index and all other visual map features on the
given Cairo surface.
Args:
cairo_surface (Cairo.Surface): the destination Cairo device.
dpi (int): dots per inch of the device.
"""
LOG.info(
"SinglePageRenderer rendering on %dx%dmm paper at %d dpi."
% (self.rc.paper_width_mm, self.rc.paper_height_mm, dpi)
)
# First determine some useful drawing parameters
safe_margin_dots = commons.convert_pt_to_dots(Renderer.PRINT_SAFE_MARGIN_PT, dpi)
usable_area_width_dots = commons.convert_pt_to_dots(self._usable_area_width_pt, dpi)
usable_area_height_dots = commons.convert_pt_to_dots(self._usable_area_height_pt, dpi)
title_margin_dots = commons.convert_pt_to_dots(self._title_margin_pt, dpi)
copyright_margin_dots = commons.convert_pt_to_dots(self._copyright_margin_pt, dpi)
map_coords_dots = map(lambda l: commons.convert_pt_to_dots(l, dpi), self._map_coords)
ctx = cairo.Context(cairo_surface)
# Set a white background
ctx.save()
ctx.set_source_rgb(1, 1, 1)
ctx.rectangle(
0,
0,
commons.convert_pt_to_dots(self.paper_width_pt, dpi),
commons.convert_pt_to_dots(self.paper_height_pt, dpi),
)
ctx.fill()
ctx.restore()
##
## Draw the map, scaled to fit the designated area
##
ctx.save()
# prevent map background from filling the full canvas
ctx.rectangle(map_coords_dots[0], map_coords_dots[1], map_coords_dots[2], map_coords_dots[3])
ctx.clip()
# Prepare to draw the map at the right location
ctx.translate(map_coords_dots[0], map_coords_dots[1])
# Draw the rescaled Map
ctx.save()
scale_factor = dpi / 72
rendered_map = self._map_canvas.get_rendered_map()
LOG.debug("Map:")
LOG.debug("Mapnik scale: 1/%f" % rendered_map.scale_denominator())
LOG.debug("Actual scale: 1/%f" % self._map_canvas.get_actual_scale())
mapnik.render(rendered_map, ctx, scale_factor, 0, 0)
ctx.restore()
# Draw the rescaled Overlay
if self.rc.overlay:
LOG.debug("Overlay:")
ctx.save()
scale_factor = dpi / 72
rendered_overlay = self._overlay_canvas.get_rendered_map()
mapnik.render(rendered_overlay, ctx, scale_factor, 0, 0)
ctx.restore()
# Draw a rectangle around the map
ctx.rectangle(0, 0, map_coords_dots[2], map_coords_dots[3])
ctx.stroke()
# Place the vertical and horizontal square labels
self._draw_labels(
ctx,
self.grid,
map_coords_dots[2],
map_coords_dots[3],
commons.convert_pt_to_dots(self._grid_legend_margin_pt, dpi),
)
ctx.restore()
##
## Draw the title
##
ctx.save()
ctx.translate(safe_margin_dots, safe_margin_dots)
self._draw_title(ctx, usable_area_width_dots, title_margin_dots, "Georgia Bold")
ctx.restore()
##
## Draw the index, when applicable
##
if self._index_renderer and self._index_area:
ctx.save()
# NEVER use ctx.scale() here because otherwise pango will
# choose different dont metrics which may be incompatible
# with what has been computed by __init__(), which may
# require more columns than expected ! Instead, we have
# to trick pangocairo into believing it is rendering to a
# device with the same default resolution, but with a
# cairo resolution matching the 'dpi' specified
# resolution. See
# index::render::StreetIndexRenederer::render() and
# comments within.
self._index_renderer.render(ctx, self._index_area, dpi)
ctx.restore()
# Also draw a rectangle
ctx.save()
ctx.rectangle(
commons.convert_pt_to_dots(self._index_area.x, dpi),
commons.convert_pt_to_dots(self._index_area.y, dpi),
commons.convert_pt_to_dots(self._index_area.w, dpi),
commons.convert_pt_to_dots(self._index_area.h, dpi),
)
ctx.stroke()
ctx.restore()
##
## Draw the copyright notice
##
ctx.save()
# Move to the right position
ctx.translate(
safe_margin_dots,
(safe_margin_dots + title_margin_dots + usable_area_height_dots + copyright_margin_dots / 4.0),
)
# Draw the copyright notice
self._draw_copyright_notice(ctx, usable_area_width_dots, copyright_margin_dots, osm_date=osm_date)
ctx.restore()
# Draw compass rose
# TODO: proper positioning/scaling, move to abstract renderer
ctx.save()
ctx.translate(50, title_margin_dots + 50)
ctx.scale(0.33, 0.33)
compass_path = os.path.abspath(
os.path.join(os.path.dirname(__file__), "..", "..", "images", "compass-rose.svg")
)
svg = rsvg.Handle(compass_path)
svg.render_cairo(ctx)
ctx.restore()
# TODO: map scale
cairo_surface.flush()
@staticmethod
def _generic_get_compatible_paper_sizes(bounding_box, scale=Renderer.DEFAULT_SCALE, index_position=None):
"""Returns a list of the compatible paper sizes for the given bounding
box. The list is sorted, smaller papers first, and a "custom" paper
matching the dimensions of the bounding box is added at the end.
Args:
bounding_box (coords.BoundingBox): the map geographic bounding box.
scale (int): minimum mapnik scale of the map.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
Returns a list of tuples (paper name, width in mm, height in
mm, portrait_ok, landscape_ok, is_default). Paper sizes are
represented in portrait mode.
"""
# the mapnik scale depends on the latitude
lat = bounding_box.get_top_left()[0]
scale *= math.cos(math.radians(lat))
# by convention, mapnik uses 90 ppi whereas cairo uses 72 ppi
scale *= float(72) / 90
geo_height_m, geo_width_m = bounding_box.spheric_sizes()
paper_width_mm = geo_width_m * 1000 / scale
paper_height_mm = geo_height_m * 1000 / scale
LOG.debug(
"Map represents %dx%dm, needs at least %.1fx%.1fcm "
"on paper." % (geo_width_m, geo_height_m, paper_width_mm / 10.0, paper_height_mm / 10.0)
)
# Take index into account, when applicable
if index_position == "side":
paper_width_mm /= 1.0 - SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO
elif index_position == "bottom":
paper_height_mm /= 1.0 - SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO
# Take margins into account
paper_width_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
paper_height_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
# Take grid legend, title and copyright into account
paper_width_mm /= 1 - Renderer.GRID_LEGEND_MARGIN_RATIO
paper_height_mm /= 1 - (Renderer.GRID_LEGEND_MARGIN_RATIO + 0.05 + 0.02)
# Transform the values into integers
paper_width_mm = int(math.ceil(paper_width_mm))
paper_height_mm = int(math.ceil(paper_height_mm))
LOG.debug("Best fit is %.1fx%.1fcm." % (paper_width_mm / 10.0, paper_height_mm / 10.0))
# Test both portrait and landscape orientations when checking for paper
# sizes.
valid_sizes = []
for name, w, h in ocitysmap.layoutlib.PAPER_SIZES:
portrait_ok = paper_width_mm <= w and paper_height_mm <= h
landscape_ok = paper_width_mm <= h and paper_height_mm <= w
if portrait_ok or landscape_ok:
valid_sizes.append([name, w, h, portrait_ok, landscape_ok, False])
# Add a 'Custom' paper format to the list that perfectly matches the
# bounding box.
valid_sizes.append(
[
"Best fit",
min(paper_width_mm, paper_height_mm),
max(paper_width_mm, paper_height_mm),
paper_width_mm < paper_height_mm,
paper_width_mm > paper_height_mm,
False,
]
)
# select the first one as default
valid_sizes[0][5] = True
return valid_sizes
class SinglePageRenderer(Renderer):
"""
This Renderer creates a full-page map, with the overlayed features
like the grid, grid labels, scale and compass rose and can draw an
index.
"""
name = 'generic_single_page'
description = 'A generic full-page layout with or without index.'
MAX_INDEX_OCCUPATION_RATIO = 1/3.
def __init__(self, db, rc, tmpdir, dpi, file_prefix,
index_position = 'side'):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
# Prepare the index
self.street_index = StreetIndex(db,
rc.polygon_wkt,
rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
self._title_margin_pt = 0.05 * self.paper_height_pt
self._copyright_margin_pt = 0.02 * self.paper_height_pt
self._usable_area_width_pt = (self.paper_width_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT +
self._title_margin_pt +
self._copyright_margin_pt))
# Prepare the Index (may raise a IndexDoesNotFitError)
if ( index_position and self.street_index
and self.street_index.categories ):
self._index_renderer, self._index_area \
= self._create_index_rendering(index_position == "side")
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area:
# No index displayed
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
self._usable_area_height_pt )
elif index_position == 'side':
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
else:
# Index on the left -> map on the right
self._map_coords = ( self._index_area.x + self._index_area.w,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
elif index_position == 'bottom':
# Index present, displayed at the bottom -> map on top
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
( self._usable_area_height_pt
- self._index_area.h ) )
else:
raise AssertionError("Invalid index position %s"
% repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi )
# Prepare the grid
self.grid = self._create_grid(self._map_canvas)
# Update the street_index to reflect the grid's actual position
if self.grid and self.street_index:
self.street_index.apply_grid(self.grid)
# Dump the CSV street index
if self.street_index:
self.street_index.write_to_csv(rc.title, '%s.csv' % file_prefix)
# Commit the internal rendering stack of the map
self._map_canvas.render()
def _create_index_rendering(self, on_the_side):
"""
Prepare to render the Street index.
Args:
on_the_side (bool): True=index on the side, False=at bottom.
Return a couple (StreetIndexRenderer, StreetIndexRenderingArea).
"""
# Now we determine the actual occupation of the index
index_renderer = StreetIndexRenderer(self.rc.i18n,
self.street_index.categories)
# We use a fake vector device to determine the actual
# rendering characteristics
fake_surface = cairo.PDFSurface(None,
self.paper_width_pt,
self.paper_height_pt)
if on_the_side:
index_max_width_pt \
= self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_width_pt
if not self.rc.i18n.isrtl():
# non-RTL: Index is on the right
index_area = index_renderer.precompute_occupation_area(
fake_surface,
( self.paper_width_pt - Renderer.PRINT_SAFE_MARGIN_PT
- index_max_width_pt ),
( Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt ),
index_max_width_pt,
self._usable_area_height_pt,
'width', 'right')
else:
# RTL: Index is on the left
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt ),
index_max_width_pt,
self._usable_area_height_pt,
'width', 'left')
else:
# Index at the bottom of the page
index_max_height_pt \
= self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_height_pt
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
( self.paper_height_pt
- Renderer.PRINT_SAFE_MARGIN_PT
- self._copyright_margin_pt
- index_max_height_pt ),
self._usable_area_width_pt,
index_max_height_pt,
'height', 'bottom')
return index_renderer, index_area
def _draw_title(self, ctx, w_dots, h_dots, font_face):
"""
Draw the title at the current position inside a
w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units)
font_face (str): Pango font specification.
"""
# Title background
ctx.save()
ctx.set_source_rgb(0.8, 0.9, 0.96)
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.fill()
ctx.restore()
# Retrieve and paint the OSM logo
ctx.save()
grp, logo_width = self._get_osm_logo(ctx, 0.8*h_dots)
if grp:
ctx.translate(w_dots - logo_width - 0.1*h_dots, 0.1*h_dots)
ctx.set_source(grp)
ctx.paint_with_alpha(0.5)
else:
LOG.warning("OSM Logo not available.")
logo_width = 0
ctx.restore()
# Prepare the title
pc = pangocairo.CairoContext(ctx)
layout = pc.create_layout()
layout.set_width(int((w_dots - 0.1*w_dots - logo_width) * pango.SCALE))
if not self.rc.i18n.isrtl(): layout.set_alignment(pango.ALIGN_LEFT)
else: layout.set_alignment(pango.ALIGN_RIGHT)
fd = pango.FontDescription(font_face)
fd.set_size(pango.SCALE)
layout.set_font_description(fd)
layout.set_text(self.rc.title)
draw_utils.adjust_font_size(layout, fd, layout.get_width(), 0.8*h_dots)
# Draw the title
ctx.save()
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.stroke()
ctx.translate(0.1*h_dots,
(h_dots -
(layout.get_size()[1] / pango.SCALE)) / 2.0)
pc.show_layout(layout)
ctx.restore()
def _draw_copyright_notice(self, ctx, w_dots, h_dots, notice=None,
osm_date=None):
"""
Draw a copyright notice at current location and within the
given w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units).
font_face (str): Pango font specification.
notice (str): Optional notice to replace the default.
"""
today = datetime.date.today()
notice = notice or \
_(u'Copyright © %(year)d MapOSMatic/OCitySMap developers. '
u'Map data © %(year)d OpenStreetMap.org '
u'and contributors (cc-by-sa).\n'
u'Map rendered on: %(date)s. OSM data updated on: %(osmdate)s. '
u'The map may be incomplete or inaccurate. '
u'You can contribute to improve this map. '
u'See http://wiki.openstreetmap.org')
# We need the correct locale to be set for strftime().
prev_locale = locale.getlocale(locale.LC_TIME)
locale.setlocale(locale.LC_TIME, self.rc.i18n.language_code())
try:
if osm_date is None:
osm_date_str = _(u'unknown')
else:
osm_date_str = osm_date.strftime("%d %B %Y %H:%M")
notice = notice % {'year': today.year,
'date': today.strftime("%d %B %Y"),
'osmdate': osm_date_str}
finally:
locale.setlocale(locale.LC_TIME, prev_locale)
ctx.save()
pc = pangocairo.CairoContext(ctx)
fd = pango.FontDescription('DejaVu')
fd.set_size(pango.SCALE)
layout = pc.create_layout()
layout.set_font_description(fd)
layout.set_text(notice)
draw_utils.adjust_font_size(layout, fd, w_dots, h_dots)
pc.show_layout(layout)
ctx.restore()
def render(self, cairo_surface, dpi, osm_date):
"""Renders the map, the index and all other visual map features on the
given Cairo surface.
Args:
cairo_surface (Cairo.Surface): the destination Cairo device.
dpi (int): dots per inch of the device.
"""
LOG.info('SinglePageRenderer rendering on %dx%dmm paper at %d dpi.' %
(self.rc.paper_width_mm, self.rc.paper_height_mm, dpi))
# First determine some useful drawing parameters
safe_margin_dots \
= commons.convert_pt_to_dots(Renderer.PRINT_SAFE_MARGIN_PT, dpi)
usable_area_width_dots \
= commons.convert_pt_to_dots(self._usable_area_width_pt, dpi)
usable_area_height_dots \
= commons.convert_pt_to_dots(self._usable_area_height_pt, dpi)
title_margin_dots \
= commons.convert_pt_to_dots(self._title_margin_pt, dpi)
copyright_margin_dots \
= commons.convert_pt_to_dots(self._copyright_margin_pt, dpi)
map_coords_dots = map(lambda l: commons.convert_pt_to_dots(l, dpi),
self._map_coords)
ctx = cairo.Context(cairo_surface)
# Set a white background
ctx.save()
ctx.set_source_rgb(1, 1, 1)
ctx.rectangle(0, 0, commons.convert_pt_to_dots(self.paper_width_pt, dpi),
commons.convert_pt_to_dots(self.paper_height_pt, dpi))
ctx.fill()
ctx.restore()
##
## Draw the index, when applicable
##
if self._index_renderer and self._index_area:
ctx.save()
# NEVER use ctx.scale() here because otherwise pango will
# choose different dont metrics which may be incompatible
# with what has been computed by __init__(), which may
# require more columns than expected ! Instead, we have
# to trick pangocairo into believing it is rendering to a
# device with the same default resolution, but with a
# cairo resolution matching the 'dpi' specified
# resolution. See
# index::render::StreetIndexRenederer::render() and
# comments within.
self._index_renderer.render(ctx, self._index_area, dpi)
ctx.restore()
# Also draw a rectangle
ctx.save()
ctx.rectangle(commons.convert_pt_to_dots(self._index_area.x, dpi),
commons.convert_pt_to_dots(self._index_area.y, dpi),
commons.convert_pt_to_dots(self._index_area.w, dpi),
commons.convert_pt_to_dots(self._index_area.h, dpi))
ctx.stroke()
ctx.restore()
##
## Draw the map, scaled to fit the designated area
##
ctx.save()
# Prepare to draw the map at the right location
ctx.translate(map_coords_dots[0], map_coords_dots[1])
# Draw the rescaled Map
ctx.save()
rendered_map = self._map_canvas.get_rendered_map()
LOG.debug('Mapnik scale: 1/%f' % rendered_map.scale_denominator())
LOG.debug('Actual scale: 1/%f' % self._map_canvas.get_actual_scale())
mapnik.render(rendered_map, ctx)
ctx.restore()
# Draw a rectangle around the map
ctx.rectangle(0, 0, map_coords_dots[2], map_coords_dots[3])
ctx.stroke()
# Place the vertical and horizontal square labels
self._draw_labels(ctx, self.grid,
map_coords_dots[2],
map_coords_dots[3],
commons.convert_pt_to_dots(self._grid_legend_margin_pt,
dpi))
ctx.restore()
##
## Draw the title
##
ctx.save()
ctx.translate(safe_margin_dots, safe_margin_dots)
self._draw_title(ctx, usable_area_width_dots,
title_margin_dots, 'Georgia Bold')
ctx.restore()
##
## Draw the copyright notice
##
ctx.save()
# Move to the right position
ctx.translate(safe_margin_dots,
( safe_margin_dots + title_margin_dots
+ usable_area_height_dots
+ copyright_margin_dots/4. ) )
# Draw the copyright notice
self._draw_copyright_notice(ctx, usable_area_width_dots,
copyright_margin_dots,
osm_date=osm_date)
ctx.restore()
# TODO: map scale
# TODO: compass rose
cairo_surface.flush()
@staticmethod
def _generic_get_compatible_paper_sizes(bounding_box,
scale=Renderer.DEFAULT_SCALE, index_position = None):
"""Returns a list of the compatible paper sizes for the given bounding
box. The list is sorted, smaller papers first, and a "custom" paper
matching the dimensions of the bounding box is added at the end.
Args:
bounding_box (coords.BoundingBox): the map geographic bounding box.
scale (int): minimum mapnik scale of the map.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom).
Returns a list of tuples (paper name, width in mm, height in
mm, portrait_ok, landscape_ok, is_default). Paper sizes are
represented in portrait mode.
"""
# the mapnik scale depends on the latitude
lat = bounding_box.get_top_left()[0]
scale *= math.cos(math.radians(lat))
# by convention, mapnik uses 90 ppi whereas cairo uses 72 ppi
scale *= float(72) / 90
geo_height_m, geo_width_m = bounding_box.spheric_sizes()
paper_width_mm = geo_width_m * 1000 / scale
paper_height_mm = geo_height_m * 1000 / scale
LOG.debug('Map represents %dx%dm, needs at least %.1fx%.1fcm '
'on paper.' % (geo_width_m, geo_height_m,
paper_width_mm/10., paper_height_mm/10.))
# Take index into account, when applicable
if index_position == 'side':
paper_width_mm /= (1. -
SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO)
elif index_position == 'bottom':
paper_height_mm /= (1. -
SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO)
# Take margins into account
paper_width_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
paper_height_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
# Take grid legend, title and copyright into account
paper_width_mm /= 1 - Renderer.GRID_LEGEND_MARGIN_RATIO
paper_height_mm /= 1 - (Renderer.GRID_LEGEND_MARGIN_RATIO + 0.05 + 0.02)
# Transform the values into integers
paper_width_mm = int(math.ceil(paper_width_mm))
paper_height_mm = int(math.ceil(paper_height_mm))
LOG.debug('Best fit is %.1fx%.1fcm.' % (paper_width_mm/10., paper_height_mm/10.))
# Test both portrait and landscape orientations when checking for paper
# sizes.
valid_sizes = []
for name, w, h in ocitysmap.layoutlib.PAPER_SIZES:
portrait_ok = paper_width_mm <= w and paper_height_mm <= h
landscape_ok = paper_width_mm <= h and paper_height_mm <= w
if portrait_ok or landscape_ok:
valid_sizes.append([name, w, h, portrait_ok, landscape_ok, False])
# Add a 'Custom' paper format to the list that perfectly matches the
# bounding box.
valid_sizes.append(['Best fit',
min(paper_width_mm, paper_height_mm),
max(paper_width_mm, paper_height_mm),
paper_width_mm < paper_height_mm,
paper_width_mm > paper_height_mm,
False])
# select the first one as default
valid_sizes[0][5] = True
return valid_sizes
def __init__(self, db, rc, tmpdir, dpi, file_prefix):
Renderer.__init__(self, db, rc, tmpdir, dpi)
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
# Compute the usable area per page
self._usable_area_width_pt = (self.paper_width_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT))
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT))
scale_denom = Renderer.DEFAULT_SCALE
# the mapnik scale depends on the latitude. However we are
# always using Mapnik conversion functions (lat,lon <->
# mercator_meters) so we don't need to take into account
# latitude in following computations
# by convention, mapnik uses 90 ppi whereas cairo uses 72 ppi
scale_denom *= float(72) / 90
GRAYED_MARGIN_MM = 10
OVERLAP_MARGIN_MM = 20
# Debug: show original bounding box as JS code
# print self.rc.bounding_box.as_javascript("original", "#00ff00")
# Convert the original Bounding box into Mercator meters
self._proj = mapnik.Projection(coords._MAPNIK_PROJECTION)
orig_envelope = self._project_envelope(self.rc.bounding_box)
# Extend the bounding box to take into account the lost outter
# margin
off_x = orig_envelope.minx - (GRAYED_MARGIN_MM * scale_denom) / 1000
off_y = orig_envelope.miny - (GRAYED_MARGIN_MM * scale_denom) / 1000
width = orig_envelope.width() + (2 * GRAYED_MARGIN_MM *
scale_denom) / 1000
height = orig_envelope.height() + (2 * GRAYED_MARGIN_MM *
scale_denom) / 1000
# Calculate the total width and height of paper needed to
# render the geographical area at the current scale.
total_width_pt = commons.convert_mm_to_pt(
float(width) * 1000 / scale_denom)
total_height_pt = commons.convert_mm_to_pt(
float(height) * 1000 / scale_denom)
self.grayed_margin_pt = commons.convert_mm_to_pt(GRAYED_MARGIN_MM)
overlap_margin_pt = commons.convert_mm_to_pt(OVERLAP_MARGIN_MM)
# Calculate the number of pages needed in both directions
if total_width_pt < self._usable_area_width_pt:
nb_pages_width = 1
else:
nb_pages_width = \
(float(total_width_pt - self._usable_area_width_pt) / \
(self._usable_area_width_pt - overlap_margin_pt)) + 1
if total_height_pt < self._usable_area_height_pt:
nb_pages_height = 1
else:
nb_pages_height = \
(float(total_height_pt - self._usable_area_height_pt) / \
(self._usable_area_height_pt - overlap_margin_pt)) + 1
# Round up the number of pages needed so that we have integer
# number of pages
self.nb_pages_width = int(math.ceil(nb_pages_width))
self.nb_pages_height = int(math.ceil(nb_pages_height))
# Calculate the entire paper area available
total_width_pt_after_extension = self._usable_area_width_pt + \
(self._usable_area_width_pt - overlap_margin_pt) * (self.nb_pages_width - 1)
total_height_pt_after_extension = self._usable_area_height_pt + \
(self._usable_area_height_pt - overlap_margin_pt) * (self.nb_pages_height - 1)
# Convert this paper area available in the number of Mercator
# meters that can be rendered on the map
total_width_merc = \
commons.convert_pt_to_mm(total_width_pt_after_extension) * scale_denom / 1000
total_height_merc = \
commons.convert_pt_to_mm(total_height_pt_after_extension) * scale_denom / 1000
# Extend the geographical boundaries so that we completely
# fill the available paper size. We are careful to extend the
# boundaries evenly on all directions (so the center of the
# previous boundaries remain the same as the new one)
off_x -= (total_width_merc - width) / 2
width = total_width_merc
off_y -= (total_height_merc - height) / 2
height = total_height_merc
# Calculate what is the final global bounding box that we will render
envelope = mapnik.Box2d(off_x, off_y, off_x + width, off_y + height)
self._geo_bbox = self._inverse_envelope(envelope)
# Debug: show transformed bounding box as JS code
# print self._geo_bbox.as_javascript("extended", "#0f0f0f")
# Convert the usable area on each sheet of paper into the
# amount of Mercator meters we can render in this area.
usable_area_merc_m_width = commons.convert_pt_to_mm(
self._usable_area_width_pt) * scale_denom / 1000
usable_area_merc_m_height = commons.convert_pt_to_mm(
self._usable_area_height_pt) * scale_denom / 1000
grayed_margin_merc_m = (GRAYED_MARGIN_MM * scale_denom) / 1000
overlap_margin_merc_m = (OVERLAP_MARGIN_MM * scale_denom) / 1000
# Calculate all the bounding boxes that correspond to the
# geographical area that will be rendered on each sheet of
# paper.
area_polygon = shapely.wkt.loads(self.rc.polygon_wkt)
bboxes = []
self.page_disposition, map_number = {}, 0
for j in reversed(range(0, self.nb_pages_height)):
col = self.nb_pages_height - j - 1
self.page_disposition[col] = []
for i in range(0, self.nb_pages_width):
cur_x = off_x + i * (usable_area_merc_m_width -
overlap_margin_merc_m)
cur_y = off_y + j * (usable_area_merc_m_height -
overlap_margin_merc_m)
envelope = mapnik.Box2d(cur_x, cur_y,
cur_x + usable_area_merc_m_width,
cur_y + usable_area_merc_m_height)
envelope_inner = mapnik.Box2d(
cur_x + grayed_margin_merc_m, cur_y + grayed_margin_merc_m,
cur_x + usable_area_merc_m_width - grayed_margin_merc_m,
cur_y + usable_area_merc_m_height - grayed_margin_merc_m)
inner_bb = self._inverse_envelope(envelope_inner)
if not area_polygon.disjoint(
shapely.wkt.loads(inner_bb.as_wkt())):
self.page_disposition[col].append(map_number)
map_number += 1
bboxes.append((self._inverse_envelope(envelope), inner_bb))
else:
self.page_disposition[col].append(None)
# Debug: show per-page bounding boxes as JS code
# for i, (bb, bb_inner) in enumerate(bboxes):
# print bb.as_javascript(name="p%d" % i)
self.pages = []
# Create an overview map
overview_bb = self._geo_bbox.create_expanded(0.001, 0.001)
# Create the overview grid
self.overview_grid = OverviewGrid(
overview_bb, [bb_inner for bb, bb_inner in bboxes],
self.rc.i18n.isrtl())
grid_shape = self.overview_grid.generate_shape_file(
os.path.join(self.tmpdir, 'grid_overview.shp'))
# Create a canvas for the overview page
self.overview_canvas = MapCanvas(self.rc.stylesheet,
overview_bb,
self._usable_area_width_pt,
self._usable_area_height_pt,
dpi,
extend_bbox_to_ratio=True)
# Create the gray shape around the overview map
exterior = shapely.wkt.loads(self.overview_canvas.get_actual_bounding_box()\
.as_wkt())
interior = shapely.wkt.loads(self.rc.polygon_wkt)
shade_wkt = exterior.difference(interior).wkt
shade = maplib.shapes.PolyShapeFile(
self.rc.bounding_box,
os.path.join(self.tmpdir, 'shape_overview.shp'), 'shade-overview')
shade.add_shade_from_wkt(shade_wkt)
self.overview_canvas.add_shape_file(shade)
self.overview_canvas.add_shape_file(grid_shape,
self.rc.stylesheet.grid_line_color,
1,
self.rc.stylesheet.grid_line_width)
self.overview_canvas.render()
# Create the map canvas for each page
indexes = []
for i, (bb, bb_inner) in enumerate(bboxes):
# Create the gray shape around the map
exterior = shapely.wkt.loads(bb.as_wkt())
interior = shapely.wkt.loads(bb_inner.as_wkt())
shade_wkt = exterior.difference(interior).wkt
shade = maplib.shapes.PolyShapeFile(
bb, os.path.join(self.tmpdir, 'shade%d.shp' % i),
'shade%d' % i)
shade.add_shade_from_wkt(shade_wkt)
# Create the contour shade
# Area to keep visible
interior_contour = shapely.wkt.loads(self.rc.polygon_wkt)
# Determine the shade WKT
shade_contour_wkt = interior.difference(interior_contour).wkt
# Prepare the shade SHP
shade_contour = maplib.shapes.PolyShapeFile(
bb, os.path.join(self.tmpdir, 'shade_contour%d.shp' % i),
'shade_contour%d' % i)
shade_contour.add_shade_from_wkt(shade_contour_wkt)
# Create one canvas for the current page
map_canvas = MapCanvas(self.rc.stylesheet,
bb,
self._usable_area_width_pt,
self._usable_area_height_pt,
dpi,
extend_bbox_to_ratio=False)
# Create canvas for overlay on current page
overla_canvas = None
if self.rc.overlay:
overlay_canvas = MapCanvas(self.rc.overlay,
bb,
self._usable_area_width_pt,
self._usable_area_height_pt,
dpi,
extend_bbox_to_ratio=False)
# Create the grid
map_grid = Grid(bb_inner, map_canvas.get_actual_scale(),
self.rc.i18n.isrtl())
grid_shape = map_grid.generate_shape_file(
os.path.join(self.tmpdir, 'grid%d.shp' % i))
map_canvas.add_shape_file(shade)
map_canvas.add_shape_file(shade_contour,
self.rc.stylesheet.shade_color_2,
self.rc.stylesheet.shade_alpha_2)
map_canvas.add_shape_file(grid_shape,
self.rc.stylesheet.grid_line_color,
self.rc.stylesheet.grid_line_alpha,
self.rc.stylesheet.grid_line_width)
map_canvas.render()
if overlay_canvas:
overlay_canvas.render()
self.pages.append((map_canvas, map_grid, overlay_canvas))
# Create the index for the current page
inside_contour_wkt = interior_contour.intersection(interior).wkt
index = StreetIndex(self.db,
inside_contour_wkt,
self.rc.i18n,
page_number=(i + 4))
index.apply_grid(map_grid)
indexes.append(index)
# Merge all indexes
self.index_categories = self._merge_page_indexes(indexes)
# Prepare the small map for the front page
self._front_page_map = self._prepare_front_page_map(dpi)
def __init__(self, db, rc, tmpdir, dpi, file_prefix,
index_position = 'side'):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom), 'extra_page' (index on 2nd page for PDF).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
self.file_prefix = file_prefix
# Prepare the index
if rc.poi_file:
self.street_index = PoiIndex(rc.poi_file)
else:
self.street_index = StreetIndex(db,
rc.polygon_wkt,
rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self.index_position = index_position
# grid marker offset (originally used for solid grid frame,
# now just for the letter/number overlay offset inside the map)
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
# reserve space for the page title if given
if self.rc.title:
self._title_margin_pt = 0.05 * self.paper_height_pt
else:
self._title_margin_pt = 0
# reserve space for the page footer
self._copyright_margin_pt = 0.03 * self.paper_height_pt
# calculate remaining usable paper space after taking header
# and footer into account
self._usable_area_width_pt = (self.paper_width_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT +
self._title_margin_pt +
self._copyright_margin_pt))
# Prepare the Index (may raise a IndexDoesNotFitError)
if ( index_position and self.street_index
and self.street_index.categories ):
self._index_renderer, self._index_area \
= self._create_index_rendering(index_position)
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area or index_position == 'extra_page':
# No index displayed
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
self._usable_area_height_pt )
elif index_position == 'side':
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
else:
# Index on the left -> map on the right
self._map_coords = ( self._index_area.x + self._index_area.w,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
elif index_position == 'bottom':
# Index present, displayed at the bottom -> map on top
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
( self._usable_area_height_pt
- self._index_area.h ) )
else:
raise AssertionError("Invalid index position %s"
% repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
rc.osmid != None )
# Prepare overlay styles for uploaded files
self._overlays = copy(self.rc.overlays)
# generate style file for GPX file
if self.rc.gpx_file:
try:
gpx_style = GpxStylesheet(self.rc.gpx_file, self.tmpdir)
except Exception as e:
LOG.warning("GPX stylesheet error: %s" % e)
else:
self._overlays.append(gpx_style)
# denormalize UMAP json to geojson, then create style for it
if self.rc.umap_file:
try:
umap_style = UmapStylesheet(self.rc.umap_file, self.tmpdir)
except Exception as e:
LOG.warning("UMAP stylesheet error: %s" % e)
else:
self._overlays.append(umap_style)
# Prepare map overlays
self._overlay_canvases = []
self._overlay_effects = {}
for overlay in self._overlays:
path = overlay.path.strip()
if path.startswith('internal:'):
plugin_name = path.lstrip('internal:')
self._overlay_effects[plugin_name] = self.get_plugin(plugin_name)
else:
self._overlay_canvases.append(MapCanvas(overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi))
# add special POI marker overlay if a POI file is given
# TODO: refactor this special case
if self.rc.poi_file:
self._overlay_effects['poi_markers'] = self.get_plugin('poi_markers')
# Prepare the grid
self.grid = self._create_grid(self._map_canvas, dpi)
if index_position: # only show grid if an actual index refers to it
self._apply_grid(self.grid, self._map_canvas)
# Commit the internal rendering stack of the map
self._map_canvas.render()
for overlay_canvas in self._overlay_canvases:
overlay_canvas.render()
class SinglePageRenderer(Renderer):
"""
This Renderer creates a full-page map, with the overlayed features
like the grid, grid labels, scale and compass rose and can draw an
index.
"""
name = 'generic_single_page'
description = 'A generic full-page layout with or without index.'
MAX_INDEX_OCCUPATION_RATIO = 1/3.
def __init__(self, db, rc, tmpdir, dpi, file_prefix,
index_position = 'side'):
"""
Create the renderer.
Args:
rc (RenderingConfiguration): rendering parameters.
tmpdir (os.path): Path to a temp dir that can hold temp files.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom), 'extra_page' (index on 2nd page for PDF).
"""
Renderer.__init__(self, db, rc, tmpdir, dpi)
self.file_prefix = file_prefix
# Prepare the index
if rc.poi_file:
self.street_index = PoiIndex(rc.poi_file)
else:
self.street_index = StreetIndex(db,
rc.polygon_wkt,
rc.i18n)
if not self.street_index.categories:
LOG.warning("Designated area leads to an empty index")
self.street_index = None
self.index_position = index_position
# grid marker offset (originally used for solid grid frame,
# now just for the letter/number overlay offset inside the map)
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
# reserve space for the page title if given
if self.rc.title:
self._title_margin_pt = 0.05 * self.paper_height_pt
else:
self._title_margin_pt = 0
# reserve space for the page footer
self._copyright_margin_pt = 0.03 * self.paper_height_pt
# calculate remaining usable paper space after taking header
# and footer into account
self._usable_area_width_pt = (self.paper_width_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT +
self._title_margin_pt +
self._copyright_margin_pt))
# Prepare the Index (may raise a IndexDoesNotFitError)
if ( index_position and self.street_index
and self.street_index.categories ):
self._index_renderer, self._index_area \
= self._create_index_rendering(index_position)
else:
self._index_renderer, self._index_area = None, None
# Prepare the layout of the whole page
if not self._index_area or index_position == 'extra_page':
# No index displayed
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
self._usable_area_height_pt )
elif index_position == 'side':
# Index present, displayed on the side
if self._index_area.x > Renderer.PRINT_SAFE_MARGIN_PT:
# Index on the right -> map on the left
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
else:
# Index on the left -> map on the right
self._map_coords = ( self._index_area.x + self._index_area.w,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
( self._usable_area_width_pt
- self._index_area.w ),
self._usable_area_height_pt )
elif index_position == 'bottom':
# Index present, displayed at the bottom -> map on top
self._map_coords = ( Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT
+ self._title_margin_pt ),
self._usable_area_width_pt,
( self._usable_area_height_pt
- self._index_area.h ) )
else:
raise AssertionError("Invalid index position %s"
% repr(index_position))
# Prepare the map
self._map_canvas = self._create_map_canvas(
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi,
rc.osmid != None )
# Prepare overlay styles for uploaded files
self._overlays = copy(self.rc.overlays)
# generate style file for GPX file
if self.rc.gpx_file:
try:
gpx_style = GpxStylesheet(self.rc.gpx_file, self.tmpdir)
except Exception as e:
LOG.warning("GPX stylesheet error: %s" % e)
else:
self._overlays.append(gpx_style)
# denormalize UMAP json to geojson, then create style for it
if self.rc.umap_file:
try:
umap_style = UmapStylesheet(self.rc.umap_file, self.tmpdir)
except Exception as e:
LOG.warning("UMAP stylesheet error: %s" % e)
else:
self._overlays.append(umap_style)
# Prepare map overlays
self._overlay_canvases = []
self._overlay_effects = {}
for overlay in self._overlays:
path = overlay.path.strip()
if path.startswith('internal:'):
plugin_name = path.lstrip('internal:')
self._overlay_effects[plugin_name] = self.get_plugin(plugin_name)
else:
self._overlay_canvases.append(MapCanvas(overlay,
self.rc.bounding_box,
float(self._map_coords[2]), # W
float(self._map_coords[3]), # H
dpi))
# add special POI marker overlay if a POI file is given
# TODO: refactor this special case
if self.rc.poi_file:
self._overlay_effects['poi_markers'] = self.get_plugin('poi_markers')
# Prepare the grid
self.grid = self._create_grid(self._map_canvas, dpi)
if index_position: # only show grid if an actual index refers to it
self._apply_grid(self.grid, self._map_canvas)
# Commit the internal rendering stack of the map
self._map_canvas.render()
for overlay_canvas in self._overlay_canvases:
overlay_canvas.render()
def _create_index_rendering(self, index_position):
"""
Prepare to render the Street index.
Args:
index_position (string): None, side, bottom or extra_page
Return a couple (StreetIndexRenderer, StreetIndexRenderingArea).
"""
index_area = None
# Now we determine the actual occupation of the index
if self.rc.poi_file:
index_renderer = PoiIndexRenderer(self.rc.i18n,
self.street_index.categories)
else:
index_renderer = StreetIndexRenderer(self.rc.i18n,
self.street_index.categories)
# We use a fake vector device to determine the actual
# rendering characteristics
fake_surface = cairo.PDFSurface(None,
self.paper_width_pt,
self.paper_height_pt)
# calculate the area required for the index
if index_position == 'side':
index_max_width_pt \
= self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_width_pt
if not self.rc.i18n.isrtl():
# non-RTL: Index is on the right
index_area = index_renderer.precompute_occupation_area(
fake_surface,
( self.paper_width_pt - Renderer.PRINT_SAFE_MARGIN_PT
- index_max_width_pt ),
( Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt ),
index_max_width_pt,
self._usable_area_height_pt,
'width', 'right')
else:
# RTL: Index is on the left
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
( Renderer.PRINT_SAFE_MARGIN_PT + self._title_margin_pt ),
index_max_width_pt,
self._usable_area_height_pt,
'width', 'left')
elif index_position == 'bottom':
# Index at the bottom of the page
index_max_height_pt \
= self.MAX_INDEX_OCCUPATION_RATIO * self._usable_area_height_pt
index_area = index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
( self.paper_height_pt
- Renderer.PRINT_SAFE_MARGIN_PT
- self._copyright_margin_pt
- index_max_height_pt ),
self._usable_area_width_pt,
index_max_height_pt,
'height', 'bottom')
return index_renderer, index_area
def _draw_title(self, ctx, w_dots, h_dots, font_face):
"""
Draw the title at the current position inside a
w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units)
font_face (str): Pango font specification.
"""
# Title background
ctx.save()
ctx.set_source_rgb(0.8, 0.9, 0.96) # TODO: make title bar color configurable?
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.fill()
ctx.restore()
# Retrieve and paint the OSM logo
ctx.save()
grp, logo_width = self._get_osm_logo(ctx, 0.8*h_dots)
if grp:
ctx.translate(w_dots - logo_width - 0.1*h_dots, 0.1*h_dots)
ctx.set_source(grp)
ctx.paint_with_alpha(0.5)
else:
LOG.warning("OSM Logo not available.")
logo_width = 0
ctx.restore()
# Retrieve and paint the extra logo
# TODO:
logo_width2 = 0
if self.rc.poi_file:
ctx.save()
grp, logo_width2 = self._get_extra_logo(ctx, 0.8*h_dots)
if grp:
ctx.translate(0.4*h_dots, 0.1*h_dots)
ctx.set_source(grp)
ctx.paint_with_alpha(0.5)
logo_width2 += 0.4*h_dots
else:
LOG.warning("Extra Logo not available.")
logo_width2 = 0
ctx.restore()
# Prepare the title
pc = PangoCairo.create_context(ctx)
layout = PangoCairo.create_layout(ctx)
layout.set_width(int((w_dots - 0.1*w_dots - logo_width - logo_width2) * Pango.SCALE))
if not self.rc.i18n.isrtl():
layout.set_alignment(Pango.Alignment.LEFT)
else:
layout.set_alignment(Pango.Alignment.RIGHT)
fd = Pango.FontDescription(font_face)
fd.set_size(Pango.SCALE)
layout.set_font_description(fd)
layout.set_text(self.rc.title, -1)
draw_utils.adjust_font_size(layout, fd, layout.get_width(), 0.8*h_dots)
# Draw the title
ctx.save()
ctx.set_line_width(1)
ctx.rectangle(0, 0, w_dots, h_dots)
ctx.stroke()
ctx.translate(0.4*h_dots + logo_width2,
(h_dots -
(layout.get_size()[1] / Pango.SCALE)) / 2.0)
PangoCairo.update_layout(ctx, layout)
PangoCairo.show_layout(ctx, layout)
ctx.restore()
def _draw_copyright_notice(self, ctx, w_dots, h_dots, notice=None,
osm_date=None):
"""
Draw a copyright notice at current location and within the
given w_dots*h_dots rectangle.
Args:
ctx (cairo.Context): The Cairo context to use to draw.
w_dots,h_dots (number): Rectangle dimension (ciaro units).
font_face (str): Pango font specification.
notice (str): Optional notice to replace the default.
"""
today = datetime.date.today()
if notice is None:
notice = _(u'Copyright © %(year)d MapOSMatic/OCitySMap developers.')
notice+= ' '
notice+= _(u'Map data © %(year)d OpenStreetMap contributors (see http://osm.org/copyright)')
notice+= '\n'
annotations = []
if self.rc.stylesheet.annotation != '':
annotations.append(self.rc.stylesheet.annotation)
for overlay in self._overlays:
if overlay.annotation != '':
annotations.append(overlay.annotation)
if len(annotations) > 0:
notice+= _(u'Map styles:')
notice+= ' ' + '; '.join(annotations) + '\n'
datasources = set()
if self.rc.stylesheet.datasource != '':
datasources.add(self.rc.stylesheet.datasource)
for overlay in self._overlays:
if overlay.datasource != '':
datasources.add(overlay.datasource)
if len(datasources) > 0:
notice+= _(u'Additional data sources:')
notice+= ' ' + '; '.join(list(datasources)) + '\n'
notice+= _(u'Map rendered on: %(date)s. OSM data updated on: %(osmdate)s.')
notice+= ' '
notice+= _(u'The map may be incomplete or inaccurate.')
# We need the correct locale to be set for strftime().
prev_locale = locale.getlocale(locale.LC_TIME)
try:
locale.setlocale(locale.LC_TIME, self.rc.i18n.language_code())
except Exception:
LOG.warning('error while setting LC_COLLATE to "%s"' % self.rc.i18n.language_code())
try:
if osm_date is None:
osm_date_str = _(u'unknown')
else:
osm_date_str = osm_date.strftime("%d %B %Y %H:%M")
notice = notice % {'year': today.year,
'date': today.strftime("%d %B %Y"),
'osmdate': osm_date_str}
finally:
locale.setlocale(locale.LC_TIME, prev_locale)
ctx.save()
pc = PangoCairo.create_context(ctx)
fd = Pango.FontDescription('DejaVu')
fd.set_size(Pango.SCALE)
layout = PangoCairo.create_layout(ctx)
layout.set_font_description(fd)
layout.set_text(notice, -1)
draw_utils.adjust_font_size(layout, fd, w_dots, h_dots)
PangoCairo.update_layout(ctx, layout)
PangoCairo.show_layout(ctx, layout)
ctx.restore()
def render(self, cairo_surface, dpi, osm_date):
"""Renders the map, the index and all other visual map features on the
given Cairo surface.
Args:
cairo_surface (Cairo.Surface): the destination Cairo device.
dpi (int): dots per inch of the device.
"""
LOG.info('SinglePageRenderer rendering -%s- on %dx%dmm paper at %d dpi.' %
(self.rc.output_format, self.rc.paper_width_mm, self.rc.paper_height_mm, dpi))
# First determine some useful drawing parameters
safe_margin_dots \
= commons.convert_pt_to_dots(Renderer.PRINT_SAFE_MARGIN_PT, dpi)
usable_area_width_dots \
= commons.convert_pt_to_dots(self._usable_area_width_pt, dpi)
usable_area_height_dots \
= commons.convert_pt_to_dots(self._usable_area_height_pt, dpi)
title_margin_dots \
= commons.convert_pt_to_dots(self._title_margin_pt, dpi)
copyright_margin_dots \
= commons.convert_pt_to_dots(self._copyright_margin_pt, dpi)
map_coords_dots = list(map(lambda l: commons.convert_pt_to_dots(l, dpi),
self._map_coords))
ctx = cairo.Context(cairo_surface)
# Set a white background
ctx.save()
ctx.set_source_rgb(1, 1, 1)
ctx.rectangle(0, 0, commons.convert_pt_to_dots(self.paper_width_pt, dpi),
commons.convert_pt_to_dots(self.paper_height_pt, dpi))
ctx.fill()
ctx.restore()
##
## Draw the map, scaled to fit the designated area
##
ctx.save()
# prevent map background from filling the full canvas
ctx.rectangle(map_coords_dots[0], map_coords_dots[1], map_coords_dots[2], map_coords_dots[3])
ctx.clip()
# Prepare to draw the map at the right location
ctx.translate(map_coords_dots[0], map_coords_dots[1])
# Draw the rescaled Map
ctx.save()
scale_factor = int(dpi / 72)
rendered_map = self._map_canvas.get_rendered_map()
LOG.debug('Map:')
LOG.debug('Mapnik scale: 1/%f' % rendered_map.scale_denominator())
LOG.debug('Actual scale: 1/%f' % self._map_canvas.get_actual_scale())
# exclude layers based on configuration setting "exclude_layers"
for layer in rendered_map.layers:
if layer.name in self.rc.stylesheet.exclude_layers:
LOG.debug("Excluding layer: %s" % layer.name)
layer.status = False
# now perform the actual drawing
mapnik.render(rendered_map, ctx, scale_factor, 0, 0)
ctx.restore()
# Draw the rescaled Overlays
for overlay_canvas in self._overlay_canvases:
ctx.save()
rendered_overlay = overlay_canvas.get_rendered_map()
LOG.debug('Overlay:') # TODO: overlay name
mapnik.render(rendered_overlay, ctx, scale_factor, 0, 0)
ctx.restore()
# Place the vertical and horizontal square labels
if self.grid and self.index_position:
self._draw_labels(ctx, self.grid,
map_coords_dots[2],
map_coords_dots[3],
commons.convert_pt_to_dots(self._grid_legend_margin_pt,
dpi))
ctx.restore()
# Draw a rectangle frame around the map
ctx.save()
ctx.set_line_width(1)
ctx.rectangle(map_coords_dots[0], map_coords_dots[1], map_coords_dots[2], map_coords_dots[3])
ctx.stroke()
ctx.restore()
##
## Draw the title
##
if self.rc.title:
ctx.save()
ctx.translate(safe_margin_dots, safe_margin_dots)
self._draw_title(ctx, usable_area_width_dots,
title_margin_dots, 'Droid Sans Bold')
ctx.restore()
# make sure that plugins do not render outside the actual map area
ctx.save()
ctx.rectangle(map_coords_dots[0], map_coords_dots[1], map_coords_dots[2], map_coords_dots[3])
ctx.clip()
# apply effect plugin overlays
for plugin_name, effect in self._overlay_effects.items():
try:
effect.render(self, ctx)
except Exception as e:
# TODO better logging
LOG.warning("Error while rendering overlay: %s\n%s" % (plugin_name, e))
ctx.restore()
##
## Draw the index, when applicable
##
# Update the street_index to reflect the grid's actual position
if self.grid and self.street_index and self.index_position is not None:
self.street_index.apply_grid(self.grid)
# Dump the CSV street index
self.street_index.write_to_csv(self.rc.title, '%s.csv' % self.file_prefix)
if self._index_renderer and self._index_area:
ctx.save()
# NEVER use ctx.scale() here because otherwise pango will
# choose different dont metrics which may be incompatible
# with what has been computed by __init__(), which may
# require more columns than expected ! Instead, we have
# to trick pangocairo into believing it is rendering to a
# device with the same default resolution, but with a
# cairo resolution matching the 'dpi' specified
# resolution. See
# index::render::StreetIndexRenederer::render() and
# comments within.
self._index_renderer.render(ctx, self._index_area, dpi)
ctx.restore()
# Also draw a rectangle frame around the index
ctx.save()
ctx.set_line_width(1)
ctx.rectangle(commons.convert_pt_to_dots(self._index_area.x, dpi),
commons.convert_pt_to_dots(self._index_area.y, dpi),
commons.convert_pt_to_dots(self._index_area.w, dpi),
commons.convert_pt_to_dots(self._index_area.h, dpi))
ctx.stroke()
ctx.restore()
##
## Draw the copyright notice
##
ctx.save()
# Move to the right position
ctx.translate(safe_margin_dots,
( safe_margin_dots + title_margin_dots
+ usable_area_height_dots
+ copyright_margin_dots/4. ) )
# Draw the copyright notice
self._draw_copyright_notice(ctx, usable_area_width_dots,
copyright_margin_dots,
osm_date=osm_date)
ctx.restore()
# render index on 2nd page if requested, and output format supports it
if self.index_position == 'extra_page' and self._has_multipage_format() and self._index_renderer is not None:
cairo_surface.show_page()
# We use a fake vector device to determine the actual
# rendering characteristics
fake_surface = cairo.PDFSurface(None,
self.paper_width_pt,
self.paper_height_pt)
usable_area_width_pt = (self.paper_width_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
usable_area_height_pt = (self.paper_height_pt -
2 * Renderer.PRINT_SAFE_MARGIN_PT)
index_area = self._index_renderer.precompute_occupation_area(
fake_surface,
Renderer.PRINT_SAFE_MARGIN_PT,
( self.paper_height_pt
- Renderer.PRINT_SAFE_MARGIN_PT
- usable_area_height_pt
),
usable_area_width_pt,
usable_area_height_pt,
'width', 'left')
ctx.save()
self._index_renderer.render(ctx, index_area, dpi)
ctx.restore()
cairo_surface.show_page()
else:
cairo_surface.flush()
@staticmethod
def _generic_get_compatible_paper_sizes(bounding_box,
paper_sizes,
scale=Renderer.DEFAULT_SCALE,
index_position = None):
"""Returns a list of the compatible paper sizes for the given bounding
box. The list is sorted, smaller papers first, and a "custom" paper
matching the dimensions of the bounding box is added at the end.
Args:
bounding_box (coords.BoundingBox): the map geographic bounding box.
scale (int): minimum mapnik scale of the map.
index_position (str): None or 'side' (index on side),
'bottom' (index at bottom), 'extra_page' (index on 2nd page for PDF).
Returns a list of tuples (paper name, width in mm, height in
mm, portrait_ok, landscape_ok, is_default). Paper sizes are
represented in portrait mode.
"""
# the mapnik scale depends on the latitude
lat = bounding_box.get_top_left()[0]
scale *= math.cos(math.radians(lat))
# by convention, mapnik uses 90 ppi whereas cairo uses 72 ppi
scale *= float(72) / 90
geo_height_m, geo_width_m = bounding_box.spheric_sizes()
paper_width_mm = geo_width_m * 1000 / scale
paper_height_mm = geo_height_m * 1000 / scale
LOG.debug('Map represents %dx%dm, needs at least %.1fx%.1fcm '
'on paper.' % (geo_width_m, geo_height_m,
paper_width_mm/10., paper_height_mm/10.))
# Take index into account, when applicable
if index_position == 'side':
paper_width_mm /= (1. -
SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO)
elif index_position == 'bottom':
paper_height_mm /= (1. -
SinglePageRenderer.MAX_INDEX_OCCUPATION_RATIO)
# Take margins into account
paper_width_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
paper_height_mm += 2 * commons.convert_pt_to_mm(Renderer.PRINT_SAFE_MARGIN_PT)
# Take grid legend, title and copyright into account
paper_width_mm /= 1 - Renderer.GRID_LEGEND_MARGIN_RATIO
paper_height_mm /= 1 - (Renderer.GRID_LEGEND_MARGIN_RATIO + 0.05 + 0.02)
# Transform the values into integers
paper_width_mm = int(math.ceil(paper_width_mm))
paper_height_mm = int(math.ceil(paper_height_mm))
# TODO make min. width / height configurable
if paper_width_mm < 100:
paper_height_mm = paper_height_mm * 100 / paper_width_mm
paper_width_mm = 100
if paper_height_mm < 100:
paper_width_mm = paper_width_mm * 100 / paper_height_mm
paper_height_mm = 100
LOG.info('Best fit is %.0fx%.0fmm.' % (paper_width_mm, paper_height_mm))
# Test both portrait and landscape orientations when checking for paper
# sizes.
is_default = True
valid_sizes = []
for name, w, h in paper_sizes:
LOG.debug("is %s compatible" % name)
if w is None:
continue
portrait_ok = paper_width_mm <= w and paper_height_mm <= h
landscape_ok = paper_width_mm <= h and paper_height_mm <= w
if portrait_ok or landscape_ok:
valid_sizes.append({
"name": name,
"width": w,
"height": h,
"portrait_ok": portrait_ok,
"landscape_ok": landscape_ok,
"default": is_default,
"landscape_preferred": paper_width_mm > paper_height_mm
})
is_default = False
# Add a 'Custom' paper format to the list that perfectly matches the
# bounding box.
valid_sizes.append({
"name": 'Best fit',
"width": min(paper_width_mm, paper_height_mm),
"height": max(paper_width_mm, paper_height_mm),
"portrait_ok": paper_width_mm < paper_height_mm,
"landscape_ok": paper_width_mm > paper_height_mm,
"default": is_default,
"landscape_preferred": paper_width_mm > paper_height_mm
})
valid_sizes.append({
"name": 'Custom',
"width": 0,
"height": 0,
"portrait_ok": True,
"landscape_ok": False,
"default": False,
"landscape_preferred": False
})
return valid_sizes
def __init__(self, db, rc, tmpdir, dpi, file_prefix):
Renderer.__init__(self, db, rc, tmpdir, dpi)
self._grid_legend_margin_pt = \
min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
# Compute the usable area per page
self._usable_area_width_pt = (self.paper_width_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT))
self._usable_area_height_pt = (self.paper_height_pt -
(2 * Renderer.PRINT_SAFE_MARGIN_PT))
scale_denom = Renderer.DEFAULT_SCALE
# the mapnik scale depends on the latitude. However we are
# always using Mapnik conversion functions (lat,lon <->
# mercator_meters) so we don't need to take into account
# latitude in following computations
# by convention, mapnik uses 90 ppi whereas cairo uses 72 ppi
scale_denom *= float(72) / 90
GRAYED_MARGIN_MM = 10
OVERLAP_MARGIN_MM = 20
# Debug: show original bounding box as JS code
# print self.rc.bounding_box.as_javascript("original", "#00ff00")
# Convert the original Bounding box into Mercator meters
self._proj = mapnik.Projection(coords._MAPNIK_PROJECTION)
orig_envelope = self._project_envelope(self.rc.bounding_box)
# Extend the bounding box to take into account the lost outter
# margin
off_x = orig_envelope.minx - (GRAYED_MARGIN_MM * scale_denom) / 1000
off_y = orig_envelope.miny - (GRAYED_MARGIN_MM * scale_denom) / 1000
width = orig_envelope.width() + (2 * GRAYED_MARGIN_MM * scale_denom) / 1000
height = orig_envelope.height() + (2 * GRAYED_MARGIN_MM * scale_denom) / 1000
# Calculate the total width and height of paper needed to
# render the geographical area at the current scale.
total_width_pt = commons.convert_mm_to_pt(float(width) * 1000 / scale_denom)
total_height_pt = commons.convert_mm_to_pt(float(height) * 1000 / scale_denom)
self.grayed_margin_pt = commons.convert_mm_to_pt(GRAYED_MARGIN_MM)
overlap_margin_pt = commons.convert_mm_to_pt(OVERLAP_MARGIN_MM)
# Calculate the number of pages needed in both directions
if total_width_pt < self._usable_area_width_pt:
nb_pages_width = 1
else:
nb_pages_width = \
(float(total_width_pt - self._usable_area_width_pt) / \
(self._usable_area_width_pt - overlap_margin_pt)) + 1
if total_height_pt < self._usable_area_height_pt:
nb_pages_height = 1
else:
nb_pages_height = \
(float(total_height_pt - self._usable_area_height_pt) / \
(self._usable_area_height_pt - overlap_margin_pt)) + 1
# Round up the number of pages needed so that we have integer
# number of pages
self.nb_pages_width = int(math.ceil(nb_pages_width))
self.nb_pages_height = int(math.ceil(nb_pages_height))
# Calculate the entire paper area available
total_width_pt_after_extension = self._usable_area_width_pt + \
(self._usable_area_width_pt - overlap_margin_pt) * (self.nb_pages_width - 1)
total_height_pt_after_extension = self._usable_area_height_pt + \
(self._usable_area_height_pt - overlap_margin_pt) * (self.nb_pages_height - 1)
# Convert this paper area available in the number of Mercator
# meters that can be rendered on the map
total_width_merc = \
commons.convert_pt_to_mm(total_width_pt_after_extension) * scale_denom / 1000
total_height_merc = \
commons.convert_pt_to_mm(total_height_pt_after_extension) * scale_denom / 1000
# Extend the geographical boundaries so that we completely
# fill the available paper size. We are careful to extend the
# boundaries evenly on all directions (so the center of the
# previous boundaries remain the same as the new one)
off_x -= (total_width_merc - width) / 2
width = total_width_merc
off_y -= (total_height_merc - height) / 2
height = total_height_merc
# Calculate what is the final global bounding box that we will render
envelope = mapnik.Box2d(off_x, off_y, off_x + width, off_y + height)
self._geo_bbox = self._inverse_envelope(envelope)
# Debug: show transformed bounding box as JS code
# print self._geo_bbox.as_javascript("extended", "#0f0f0f")
# Convert the usable area on each sheet of paper into the
# amount of Mercator meters we can render in this area.
usable_area_merc_m_width = commons.convert_pt_to_mm(self._usable_area_width_pt) * scale_denom / 1000
usable_area_merc_m_height = commons.convert_pt_to_mm(self._usable_area_height_pt) * scale_denom / 1000
grayed_margin_merc_m = (GRAYED_MARGIN_MM * scale_denom) / 1000
overlap_margin_merc_m = (OVERLAP_MARGIN_MM * scale_denom) / 1000
# Calculate all the bounding boxes that correspond to the
# geographical area that will be rendered on each sheet of
# paper.
area_polygon = shapely.wkt.loads(self.rc.polygon_wkt)
bboxes = []
self.page_disposition, map_number = {}, 0
for j in reversed(range(0, self.nb_pages_height)):
col = self.nb_pages_height - j - 1
self.page_disposition[col] = []
for i in range(0, self.nb_pages_width):
cur_x = off_x + i * (usable_area_merc_m_width - overlap_margin_merc_m)
cur_y = off_y + j * (usable_area_merc_m_height - overlap_margin_merc_m)
envelope = mapnik.Box2d(cur_x, cur_y,
cur_x+usable_area_merc_m_width,
cur_y+usable_area_merc_m_height)
envelope_inner = mapnik.Box2d(cur_x + grayed_margin_merc_m,
cur_y + grayed_margin_merc_m,
cur_x + usable_area_merc_m_width - grayed_margin_merc_m,
cur_y + usable_area_merc_m_height - grayed_margin_merc_m)
inner_bb = self._inverse_envelope(envelope_inner)
if not area_polygon.disjoint(shapely.wkt.loads(
inner_bb.as_wkt())):
self.page_disposition[col].append(map_number)
map_number += 1
bboxes.append((self._inverse_envelope(envelope),
inner_bb))
else:
self.page_disposition[col].append(None)
# Debug: show per-page bounding boxes as JS code
# for i, (bb, bb_inner) in enumerate(bboxes):
# print bb.as_javascript(name="p%d" % i)
self.pages = []
# Create an overview map
overview_bb = self._geo_bbox.create_expanded(0.001, 0.001)
# Create the overview grid
self.overview_grid = OverviewGrid(overview_bb,
[bb_inner for bb, bb_inner in bboxes], self.rc.i18n.isrtl())
grid_shape = self.overview_grid.generate_shape_file(
os.path.join(self.tmpdir, 'grid_overview.shp'))
# Create a canvas for the overview page
self.overview_canvas = MapCanvas(self.rc.stylesheet,
overview_bb, self._usable_area_width_pt,
self._usable_area_height_pt, dpi,
extend_bbox_to_ratio=True)
# Create the gray shape around the overview map
exterior = shapely.wkt.loads(self.overview_canvas.get_actual_bounding_box()\
.as_wkt())
interior = shapely.wkt.loads(self.rc.polygon_wkt)
shade_wkt = exterior.difference(interior).wkt
shade = maplib.shapes.PolyShapeFile(self.rc.bounding_box,
os.path.join(self.tmpdir, 'shape_overview.shp'),
'shade-overview')
shade.add_shade_from_wkt(shade_wkt)
self.overview_canvas.add_shape_file(shade)
self.overview_canvas.add_shape_file(grid_shape,
self.rc.stylesheet.grid_line_color, 1,
self.rc.stylesheet.grid_line_width)
self.overview_canvas.render()
# Create the map canvas for each page
indexes = []
for i, (bb, bb_inner) in enumerate(bboxes):
# Create the gray shape around the map
exterior = shapely.wkt.loads(bb.as_wkt())
interior = shapely.wkt.loads(bb_inner.as_wkt())
shade_wkt = exterior.difference(interior).wkt
shade = maplib.shapes.PolyShapeFile(
bb, os.path.join(self.tmpdir, 'shade%d.shp' % i),
'shade%d' % i)
shade.add_shade_from_wkt(shade_wkt)
# Create the contour shade
# Area to keep visible
interior_contour = shapely.wkt.loads(self.rc.polygon_wkt)
# Determine the shade WKT
shade_contour_wkt = interior.difference(interior_contour).wkt
# Prepare the shade SHP
shade_contour = maplib.shapes.PolyShapeFile(bb,
os.path.join(self.tmpdir, 'shade_contour%d.shp' % i),
'shade_contour%d' % i)
shade_contour.add_shade_from_wkt(shade_contour_wkt)
# Create one canvas for the current page
map_canvas = MapCanvas(self.rc.stylesheet,
bb, self._usable_area_width_pt,
self._usable_area_height_pt, dpi,
extend_bbox_to_ratio=False)
# Create the grid
map_grid = Grid(bb_inner, map_canvas.get_actual_scale(), self.rc.i18n.isrtl())
grid_shape = map_grid.generate_shape_file(
os.path.join(self.tmpdir, 'grid%d.shp' % i))
map_canvas.add_shape_file(shade)
map_canvas.add_shape_file(shade_contour,
self.rc.stylesheet.shade_color_2,
self.rc.stylesheet.shade_alpha_2)
map_canvas.add_shape_file(grid_shape,
self.rc.stylesheet.grid_line_color,
self.rc.stylesheet.grid_line_alpha,
self.rc.stylesheet.grid_line_width)
map_canvas.render()
self.pages.append((map_canvas, map_grid))
# Create the index for the current page
inside_contour_wkt = interior_contour.intersection(interior).wkt
index = StreetIndex(self.db,
inside_contour_wkt,
self.rc.i18n, page_number=(i + 4))
index.apply_grid(map_grid)
indexes.append(index)
# Merge all indexes
self.index_categories = self._merge_page_indexes(indexes)
# Prepare the small map for the front page
self._front_page_map = self._prepare_front_page_map(dpi)