def draw_pattern(draw, size):
w, h = size
black_color = ImageColor.getrgb("black")
draw.rectangle((0, 0, w - 1, h - 1), outline=black_color)
draw.ellipse((0, 0, w - 1, h - 1), outline=black_color)
step = w / 16.0
for i in range(16):
color = ImageColor.getrgb('#3' + hex(16 - i)[-1] + hex(i)[-1])
draw.line((i * step, 0, i * step, h), fill=color)
step = h / 16.0
for i in range(16):
color = ImageColor.getrgb('#' + hex(16 - i)[-1] + hex(i)[-1] + '3')
draw.line((0, i * step, w, i * step), fill=color)
def draw_pattern(draw, size):
w, h = size
black_color = ImageColor.getrgb("black")
draw.rectangle((0, 0, w-1, h-1), outline=black_color)
draw.ellipse((0, 0, w-1, h-1), outline=black_color)
step = w/16.0
for i in range(16):
color = ImageColor.getrgb('#3' + hex(16-i)[-1] + hex(i)[-1])
draw.line((i*step, 0, i*step, h), fill=color)
step = h/16.0
for i in range(16):
color = ImageColor.getrgb('#' + hex(16-i)[-1] + hex(i)[-1] + '3')
draw.line((0, i*step, w, i*step), fill=color)
def create_image(size, image_opts=None):
"""
Create a new image that is compatible with the given `image_opts`.
Takes into account mode, transparent, bgcolor.
"""
from mapproxy.platform.image import Image, ImageColor
if image_opts is None:
mode = 'RGB'
bgcolor = (255, 255, 255)
else:
mode = image_opts.mode
if mode in (None, 'P'):
if image_opts.transparent:
mode = 'RGBA'
else:
mode = 'RGB'
bgcolor = image_opts.bgcolor or (255, 255, 255)
if isinstance(bgcolor, basestring):
bgcolor = ImageColor.getrgb(bgcolor)
if image_opts.transparent and len(bgcolor) == 3:
bgcolor = bgcolor + (0, )
if image_opts.mode == 'I':
bgcolor = bgcolor[0]
return Image.new(mode, size, bgcolor)
def create_image(size, image_opts=None):
"""
Create a new image that is compatible with the given `image_opts`.
Takes into account mode, transparent, bgcolor.
"""
from mapproxy.platform.image import Image, ImageColor
if image_opts is None:
mode = 'RGB'
bgcolor = (255, 255, 255)
else:
mode = image_opts.mode
if mode in (None, 'P'):
if image_opts.transparent:
mode = 'RGBA'
else:
mode = 'RGB'
bgcolor = image_opts.bgcolor or (255, 255, 255)
if isinstance(bgcolor, basestring):
bgcolor = ImageColor.getrgb(bgcolor)
if image_opts.transparent and len(bgcolor) == 3:
bgcolor = bgcolor + (0, )
if image_opts.mode == 'I':
bgcolor = bgcolor[0]
return Image.new(mode, size, bgcolor)
def create_debug_img(size, transparent=True):
if transparent:
img = Image.new("RGBA", size)
else:
img = Image.new("RGB", size, ImageColor.getrgb("#EEE"))
draw = ImageDraw.Draw(img)
draw_pattern(draw, size)
return img
def create_debug_img(size, transparent=True):
if transparent:
img = Image.new("RGBA", size)
else:
img = Image.new("RGB", size, ImageColor.getrgb("#EEE"))
draw = ImageDraw.Draw(img)
draw_pattern(draw, size)
return img
def create_tmp_image_file(size, two_colored=False):
fd, out_file = tempfile.mkstemp(suffix=".png")
os.close(fd)
print "creating temp image %s (%r)" % (out_file, size)
img = Image.new("RGBA", size)
if two_colored:
draw = ImageDraw.Draw(img)
draw.rectangle((0, 0, img.size[0] // 2, img.size[1]), fill=ImageColor.getrgb("white"))
img.save(out_file, "png")
return out_file
def test_blank(self):
image_opts = PNG_FORMAT.copy()
image_opts.bgcolor = '#113399'
img = message_image('', size=(100, 150), image_opts=image_opts)
assert isinstance(img, ImageSource)
eq_(img.size, (100, 150))
pil_img = img.as_image()
eq_(pil_img.getpixel((0, 0)), ImageColor.getrgb('#113399'))
# 3 values in histogram (RGB)
assert [x for x in pil_img.histogram() if x > 0] == [15000, 15000, 15000]
def create_tmp_image_file(size, two_colored=False):
fd, out_file = tempfile.mkstemp(suffix='.png')
os.close(fd)
print 'creating temp image %s (%r)' % (out_file, size)
img = Image.new('RGBA', size)
if two_colored:
draw = ImageDraw.Draw(img)
draw.rectangle((0, 0, img.size[0]//2, img.size[1]),
fill=ImageColor.getrgb('white'))
img.save(out_file, 'png')
return out_file
def test_blank(self):
image_opts = PNG_FORMAT.copy()
image_opts.bgcolor = '#113399'
img = message_image('', size=(100, 150), image_opts=image_opts)
assert isinstance(img, ImageSource)
eq_(img.size, (100, 150))
pil_img = img.as_image()
eq_(pil_img.getpixel((0, 0)), ImageColor.getrgb('#113399'))
# 3 values in histogram (RGB)
assert [x for x in pil_img.histogram()
if x > 0] == [15000, 15000, 15000]
def create_tmp_image_file(size, two_colored=False):
fd, out_file = tempfile.mkstemp(suffix='.png')
os.close(fd)
print 'creating temp image %s (%r)' % (out_file, size)
img = Image.new('RGBA', size)
if two_colored:
draw = ImageDraw.Draw(img)
draw.rectangle((0, 0, img.size[0] // 2, img.size[1]),
fill=ImageColor.getrgb('white'))
img.save(out_file, 'png')
return out_file
def concat_legends(legends,
format='png',
size=None,
bgcolor='#ffffff',
transparent=True):
"""
Merge multiple legends into one
:param images: list of `ImageSource`, bottom image first
:param format: the format of the output `ImageSource`
:param size: size of the merged image, if ``None`` the size
will be calculated
:rtype: `ImageSource`
"""
if not legends:
return BlankImageSource(size=(1, 1),
image_opts=ImageOptions(
bgcolor=bgcolor, transparent=transparent))
if len(legends) == 1:
return legends[0]
legends = legends[:]
legends.reverse()
if size is None:
legend_width = 0
legend_height = 0
legend_position_y = []
#iterate through all legends, last to first, calc img size and remember the y-position
for legend in legends:
legend_position_y.append(legend_height)
tmp_img = legend.as_image()
legend_width = max(legend_width, tmp_img.size[0])
legend_height += tmp_img.size[
1] #images shall not overlap themselfs
size = [legend_width, legend_height]
bgcolor = ImageColor.getrgb(bgcolor)
if transparent:
img = Image.new('RGBA', size, bgcolor + (0, ))
else:
img = Image.new('RGB', size, bgcolor)
for i in range(len(legends)):
legend_img = legends[i].as_image()
if legend_img.mode == 'RGBA':
# paste w transparency mask from layer
img.paste(legend_img, (0, legend_position_y[i]), legend_img)
else:
img.paste(legend_img, (0, legend_position_y[i]))
return ImageSource(img, image_opts=ImageOptions(format=format))
def create_mixed_mode_img(size, format='png'):
img = Image.new("RGBA", size)
# draw a black rectangle into the image, rect_width = 3/4 img_width
# thus 1/4 of the image is transparent and with square tiles, one of two
# tiles (img size = 512x256) will be fully opaque and the other
# has transparency
draw = ImageDraw.Draw(img)
w, h = size
red_color = ImageColor.getrgb("red")
draw.rectangle((w/4, 0, w, h), fill=red_color)
data = StringIO()
img.save(data, format)
data.seek(0)
yield data
def create_mixed_mode_img(size, format='png'):
img = Image.new("RGBA", size)
# draw a black rectangle into the image, rect_width = 3/4 img_width
# thus 1/4 of the image is transparent and with square tiles, one of two
# tiles (img size = 512x256) will be fully opaque and the other
# has transparency
draw = ImageDraw.Draw(img)
w, h = size
red_color = ImageColor.getrgb("red")
draw.rectangle((w / 4, 0, w, h), fill=red_color)
data = StringIO()
img.save(data, format)
data.seek(0)
yield data
def concat_legends(legends, format='png', size=None, bgcolor='#ffffff', transparent=True):
"""
Merge multiple legends into one
:param images: list of `ImageSource`, bottom image first
:param format: the format of the output `ImageSource`
:param size: size of the merged image, if ``None`` the size
will be calculated
:rtype: `ImageSource`
"""
if not legends:
return BlankImageSource(size=(1,1), image_opts=ImageOptions(bgcolor=bgcolor, transparent=transparent))
if len(legends) == 1:
return legends[0]
legends = legends[:]
legends.reverse()
if size is None:
legend_width = 0
legend_height = 0
legend_position_y = []
#iterate through all legends, last to first, calc img size and remember the y-position
for legend in legends:
legend_position_y.append(legend_height)
tmp_img = legend.as_image()
legend_width = max(legend_width, tmp_img.size[0])
legend_height += tmp_img.size[1] #images shall not overlap themselfs
size = [legend_width, legend_height]
bgcolor = ImageColor.getrgb(bgcolor)
if transparent:
img = Image.new('RGBA', size, bgcolor+(0,))
else:
img = Image.new('RGB', size, bgcolor)
for i in range(len(legends)):
legend_img = legends[i].as_image()
if legend_img.mode == 'RGBA':
# paste w transparency mask from layer
img.paste(legend_img, (0, legend_position_y[i]), legend_img)
else:
img.paste(legend_img, (0, legend_position_y[i]))
return ImageSource(img, image_opts=ImageOptions(format=format))
def font_color(self):
if self.inverse:
return ImageColor.getrgb('white')
else:
return ImageColor.getrgb('black')
def font_color(self):
if self.image_opts.transparent:
return ImageColor.getrgb('black')
if _luminance(ImageColor.getrgb(self.image_opts.bgcolor)) < 128:
return ImageColor.getrgb('white')
return ImageColor.getrgb('black')
class MessageImage(object):
"""
Base class for text rendering in images (for watermarks, exception images, etc.)
:ivar font_name: the font name for the text
:ivar font_size: the font size of the text
:ivar font_color: the color of the font as a tuple
:ivar box_color: the color of the box behind the text.
color as a tuple or ``None``
"""
font_name = 'DejaVu Sans Mono'
font_size = 10
font_color = ImageColor.getrgb('black')
box_color = None
linespacing = 5
padding = 3
placement = 'ul'
def __init__(self, message, image_opts):
self.message = message
self.image_opts = image_opts
self._font = None
@property
def font(self):
global _pil_ttf_support
if self._font is None:
if self.font_name != 'default' and _pil_ttf_support:
try:
self._font = ImageFont.truetype(font_file(self.font_name),
self.font_size)
except ImportError:
_pil_ttf_support = False
log_system.warn(
"Couldn't load TrueType fonts, "
"PIL needs to be build with freetype support.")
except IOError:
_pil_ttf_support = False
log_system.warn("Couldn't load find TrueType font ",
self.font_name)
if self._font is None:
self._font = ImageFont.load_default()
return self._font
def new_image(self, size):
return Image.new('RGBA', size)
def draw(self, img=None, size=None, in_place=True):
"""
Create the message image. Either draws on top of `img` or creates a
new image with the given `size`.
"""
if not ((img and not size) or (size and not img)):
raise TypeError, 'need either img or size argument'
if img is None:
base_img = self.new_image(size)
elif not in_place:
size = img.size
base_img = self.new_image(size)
else:
base_img = img.as_image()
size = base_img.size
if not self.message:
if img is not None:
return img
return ImageSource(base_img, size=size, image_opts=self.image_opts)
draw = ImageDraw.Draw(base_img)
self.draw_msg(draw, size)
image_opts = self.image_opts
if not in_place and img:
image_opts = image_opts or img.image_opts
img = img.as_image()
converted = False
if len(self.font_color) == 4 and img.mode != 'RGBA':
# we need RGBA to keep transparency from text
converted = img.mode
img = img.convert('RGBA')
img.paste(base_img, (0, 0), base_img)
if converted == 'RGB':
# convert image back
img = img.convert('RGB')
base_img = img
return ImageSource(base_img, size=size, image_opts=image_opts)
def draw_msg(self, draw, size):
td = TextDraw(self.message,
font=self.font,
bg_color=self.box_color,
font_color=self.font_color,
placement=self.placement,
linespacing=self.linespacing,
padding=self.padding)
td.draw(draw, size)
def font_color(self):
if self.inverse:
return ImageColor.getrgb('white')
else:
return ImageColor.getrgb('black')
def font_color(self):
if self.image_opts.transparent:
return ImageColor.getrgb('black')
if _luminance(ImageColor.getrgb(self.image_opts.bgcolor)) < 128:
return ImageColor.getrgb('white')
return ImageColor.getrgb('black')
