def make(src_path, out_path):
src = Image.open(src_path)
src = src.copy()
(srcr, srcg, srcb, srca) = src.split()
white = ImageChops.constant(src, 255)
outr = cast_gradation(srcr, 0, 90)
outg = cast_gradation(srcg, 0, 90)
outb = cast_gradation(srcb, 0, 90)
outa = srca.copy()
outr = ImageChops.composite(srcr, white, srca)
outg = ImageChops.composite(srcg, white, srca)
outb = ImageChops.composite(srcb, white, srca)
(shadow_a, shadow) = make_inset_shadow(srca)
outr = ImageChops.subtract(outr, shadow, 1, 0)
outg = ImageChops.subtract(outg, shadow, 1, 0)
outb = ImageChops.subtract(outb, shadow, 1, 0)
outa = ImageChops.lighter(outa, shadow_a)
(highlight_a, highlight) = make_highlight(srca)
outa = ImageChops.lighter(outa, highlight)
outa = ImageChops.subtract(outa, ImageChops.constant(outa, 25), 1, 0)
out = Image.merge('RGBA', (outr, outg, outb, outa))
out.save(out_path)
def make(src_path, out_path):
src = Image.open(src_path)
src = src.copy()
(srcr, srcg, srcb, srca) = src.split()
white = ImageChops.constant(src, 255)
outr = cast_gradation(srcr, 0, 90)
outg = cast_gradation(srcg, 0, 90)
outb = cast_gradation(srcb, 0, 90)
outa = srca.copy()
outr = ImageChops.composite(srcr, white, srca)
outg = ImageChops.composite(srcg, white, srca)
outb = ImageChops.composite(srcb, white, srca)
(shadow_a, shadow) = make_inset_shadow(srca)
outr = ImageChops.subtract(outr, shadow, 1, 0)
outg = ImageChops.subtract(outg, shadow, 1, 0)
outb = ImageChops.subtract(outb, shadow, 1, 0)
outa = ImageChops.lighter(outa, shadow_a)
(highlight_a, highlight) = make_highlight(srca)
outa = ImageChops.lighter(outa, highlight)
outa = ImageChops.subtract(outa, ImageChops.constant(outa, 25), 1, 0)
out = Image.merge('RGBA', (outr, outg, outb, outa))
out.save(out_path)
def draw_marker(width, height, offset, filename):
im = Image.new('L', (128, 256), 255)
draw = ImageDraw.Draw(im)
cx = (im.size[0] / 2) + 1.5
cy = (im.size[1] / 4) + 1.5
radius = width * 4.0 / 2.0
offset = int(offset * 4.0)
for thickness, colour in ((0, 0x60), (4, 0xE0)):
ol = im.copy()
r = radius + 0.5 - thickness
draw.ellipse((cx - r, cy - r, cx + r, cy + r), fill=colour)
x1 = offset + 0.5 - (thickness * 1.5)
y1 = (height * 4.0) + 0.5 - (width * 2.0) - (thickness * 2.0)
draw.polygon((cx + 0.5, cy + y1, cx - 0.5, cy + y1, cx - x1, cy + 16.5,
cx + x1, cy + 16.5),
fill=colour)
del draw
im = im.resize((im.size[0] / 4, im.size[1] / 4), Image.ANTIALIAS)
ol = ol.resize(im.size, Image.ANTIALIAS)
mask = Image.eval(ol, lambda x: (0, 255)[x < 210])
im = Image.composite(im, ImageChops.constant(im, 0), mask)
im = im.crop(im.getbbox())
im.save(filename, transparency=0)
def draw_marker(width, height, offset, filename):
im = Image.new('L', (128, 256), 255)
draw = ImageDraw.Draw(im)
cx = (im.size[0] / 2) + 1.5
cy = (im.size[1] / 4) + 1.5
radius = width * 4.0 / 2.0
offset = int(offset * 4.0)
for thickness, colour in ((0, 0x60), (4, 0xE0)):
ol = im.copy()
r = radius + 0.5 - thickness
draw.ellipse((cx - r, cy - r, cx + r, cy + r), fill=colour)
x1 = offset + 0.5 - (thickness * 1.5)
y1 = (height * 4.0) + 0.5 - (width * 2.0) - (thickness * 2.0)
draw.polygon((cx + 0.5, cy + y1, cx - 0.5, cy + y1,
cx - x1, cy + 16.5, cx + x1, cy + 16.5),
fill=colour)
del draw
im = im.resize((im.size[0] / 4, im.size[1] / 4), Image.ANTIALIAS)
ol = ol.resize(im.size, Image.ANTIALIAS)
mask = Image.eval(ol, lambda x: (0, 255)[x < 210])
im = Image.composite(im, ImageChops.constant(im, 0), mask)
im = im.crop(im.getbbox())
im.save(filename, transparency=0)
view = im.view(0, 0, width, height) # x,y,width,height
#print "saving ", map_uri
#view.save(map_uri,'png')
#'save' the image in a string
imgStr = view.tostring('png')
# reopen the saved image with PIL to count the color
# if 1, the pic is empty
#img = Image.open(map_uri)
# kind of StringIO() for images instead:
imgParser = ImageFile.Parser()
imgParser.feed(imgStr)
img = imgParser.close()
if len(img.getcolors()) == 1:
print "empty file not saved", map_uri
#delete the pic file if empty
#os.remove(map_uri)
else:
# Crop the file to its smaller extent
# Cropping the pic allow a much concise html page formatting,
# use CSS for the rest
img256 = img.convert('L')
imgbg = ImageChops.constant(img256, img256.getpixel((0, 0)))
box = ImageChops.difference(img256, imgbg).getbbox()
out = img.crop(box)
print "saving ", map_uri
out.save(map_uri)
def renderLegendElement(sourceFile, elementType, tagList, zoom, imageWidth,
map_uri):
"""
# 'Fake' load a map to use mapnik libxml2 support for large xml files
mSource = mapnik.Map(1,1)
mapnik.load_map(mSource,sourceFile)
inputstylesheet=mapnik.save_map_to_string(mSource)
"""
# serialize map file with external entities included
inputstylesheet = etree.tostring(etree.parse(sourceFile))
# the mapfile (stylesheet made only for legend element rendering
# is returned as a string, no file is written on disk
# then use mapnik.load_map_from_string
mapfile = create_legend_stylesheet(inputstylesheet)
# create a new element, which return its bbox and an osm file as
# a string
osmStr, bound = createOsmElement(elementType, tagList, zoom)
# create a named temporary file, mapnik needs a real file
# we cannot pass a StringIO nor a string, nor a unnammed
# temporary file
osmFile = tempfile.NamedTemporaryFile(mode='w+t')
osmFile.write(osmStr) #write the osm file
osmFile.seek(0) #rewind
#---------------------------------------------------
# Set up projection
# long/lat in degrees, aka ESPG:4326 and "WGS 84"
lonlat = mapnik.Projection('+proj=longlat +datum=WGS84')
#bbbox =(lon,lat,maxlon,maxlat)
ratio = abs((bound[2] - bound[0]) / (bound[3] - bound[1]))
width = imageWidth
height = int(width / ratio * 1)
# add +1 if highway=path looks blurry FIXME
m = mapnik.Map(width, height)
mapnik.load_map_from_string(m, mapfile)
m.srs = lonlat.params()
for l in m.layers:
l.datasource = Osm(file=osmFile.name)
l.srs = lonlat.params()
# uncomment this line to save the mapfile on disk, remember to
# NEVER show this file to a stylesheet maintainer:
#save_map(m,'mapfile.xml')
# render the element and save to disk
bbox =lonlat.forward(mapnik.Envelope(mapnik.Coord(bound[0],bound[1]),\
mapnik.Coord(bound[2],bound[3])))
m.zoom_to_box(bbox)
im = mapnik.Image(width, height)
mapnik.render(m, im)
osmFile.close() # closing the datasource
view = im.view(0, 0, width, height) # x,y,width,height
#print "saving ", map_uri
#view.save(map_uri,'png')
#'save' the image in a string
imgStr = view.tostring('png')
# reopen the saved image with PIL to count the color
# if 1, the pic is empty
#img = Image.open(map_uri)
# kind of StringIO() for images instead:
imgParser = ImageFile.Parser()
imgParser.feed(imgStr)
img = imgParser.close()
if len(img.getcolors()) == 1:
print "empty file not saved", map_uri
#delete the pic file if empty
#os.remove(map_uri)
else:
# Crop the file to its smaller extent
# Cropping the pic allow a much concise html page formatting,
# use CSS for the rest
img256 = img.convert('L')
imgbg = ImageChops.constant(img256, img256.getpixel((0, 0)))
box = ImageChops.difference(img256, imgbg).getbbox()
out = img.crop(box)
print "saving ", map_uri
out.save(map_uri)
return True
#view.save(map_uri,'png')
#'save' the image in a string
imgStr=view.tostring('png')
# reopen the saved image with PIL to count the color
# if 1, the pic is empty
#img = Image.open(map_uri)
# kind of StringIO() for images instead:
imgParser=ImageFile.Parser()
imgParser.feed(imgStr)
img = imgParser.close()
if len(img.getcolors()) == 1:
print "empty file not saved", map_uri
#delete the pic file if empty
#os.remove(map_uri)
else:
# Crop the file to its smaller extent
# Cropping the pic allow a much concise html page formatting,
# use CSS for the rest
img256=img.convert('L')
imgbg=ImageChops.constant(img256,img256.getpixel((0,0)))
box=ImageChops.difference(img256, imgbg).getbbox()
out=img.crop(box)
print "saving ", map_uri
out.save(map_uri)
def renderLegendElement(sourceFile, elementType, tagList, zoom, imageWidth, map_uri):
"""
# 'Fake' load a map to use mapnik libxml2 support for large xml files
mSource = mapnik.Map(1,1)
mapnik.load_map(mSource,sourceFile)
inputstylesheet=mapnik.save_map_to_string(mSource)
"""
# serialize map file with external entities included
inputstylesheet=etree.tostring(etree.parse(sourceFile))
# the mapfile (stylesheet made only for legend element rendering
# is returned as a string, no file is written on disk
# then use mapnik.load_map_from_string
mapfile = create_legend_stylesheet(inputstylesheet)
# create a new element, which return its bbox and an osm file as
# a string
osmStr, bound = createOsmElement(elementType, tagList, zoom)
# create a named temporary file, mapnik needs a real file
# we cannot pass a StringIO nor a string, nor a unnammed
# temporary file
osmFile = tempfile.NamedTemporaryFile(mode='w+t')
osmFile.write(osmStr) #write the osm file
osmFile.seek(0) #rewind
#---------------------------------------------------
# Set up projection
# long/lat in degrees, aka ESPG:4326 and "WGS 84"
lonlat = mapnik.Projection('+proj=longlat +datum=WGS84')
#bbbox =(lon,lat,maxlon,maxlat)
ratio= abs((bound[2]-bound[0])/(bound[3]-bound[1]))
width = imageWidth
height = int(width/ratio*1)
# add +1 if highway=path looks blurry FIXME
m = mapnik.Map(width,height)
mapnik.load_map_from_string(m,mapfile)
m.srs = lonlat.params()
for l in m.layers:
l.datasource = Osm(file=osmFile.name)
l.srs = lonlat.params()
# uncomment this line to save the mapfile on disk, remember to
# NEVER show this file to a stylesheet maintainer:
#save_map(m,'mapfile.xml')
# render the element and save to disk
bbox =lonlat.forward(mapnik.Envelope(mapnik.Coord(bound[0],bound[1]),\
mapnik.Coord(bound[2],bound[3])))
m.zoom_to_box(bbox)
im = mapnik.Image(width,height)
mapnik.render(m, im)
osmFile.close() # closing the datasource
view = im.view(0,0,width,height) # x,y,width,height
#print "saving ", map_uri
#view.save(map_uri,'png')
#'save' the image in a string
imgStr=view.tostring('png')
# reopen the saved image with PIL to count the color
# if 1, the pic is empty
#img = Image.open(map_uri)
# kind of StringIO() for images instead:
imgParser=ImageFile.Parser()
imgParser.feed(imgStr)
img = imgParser.close()
if len(img.getcolors()) == 1:
print "empty file not saved", map_uri
#delete the pic file if empty
#os.remove(map_uri)
else:
# Crop the file to its smaller extent
# Cropping the pic allow a much concise html page formatting,
# use CSS for the rest
img256=img.convert('L')
imgbg=ImageChops.constant(img256,img256.getpixel((0,0)))
box=ImageChops.difference(img256, imgbg).getbbox()
out=img.crop(box)
print "saving ", map_uri
out.save(map_uri)
return True
