# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
-import Image, ImageFont, ImageDraw, ImageFilter
-from librarian import get_resource
+import re
+from PIL import Image, ImageFont, ImageDraw, ImageFilter
+from StringIO import StringIO
+from librarian import get_resource, OutputFile, URLOpener
+
+
+class Metric(object):
+ """Gets metrics from an object, scaling it by a factor."""
+ def __init__(self, obj, scale):
+ self._obj = obj
+ self._scale = float(scale)
+
+ def __getattr__(self, name):
+ src = getattr(self._obj, name)
+ if src and self._scale:
+ src = type(src)(self._scale * src)
+ return src
+
+
+class TextBox(object):
+ """Creates an Image with a series of centered strings."""
+
+ SHADOW_X = 3
+ SHADOW_Y = 3
+ SHADOW_BLUR = 3
+
+ def __init__(self, max_width, max_height, padding_x=None, padding_y=None):
+ if padding_x is None:
+ padding_x = self.SHADOW_X + self.SHADOW_BLUR
+ if padding_y is None:
+ padding_y = self.SHADOW_Y + self.SHADOW_BLUR
+
+ self.max_width = max_width
+ self.max_text_width = max_width - 2 * padding_x
+ self.padding_y = padding_y
+ self.height = padding_y
+ self.img = Image.new('RGBA', (max_width, max_height))
+ self.draw = ImageDraw.Draw(self.img)
+ self.shadow_img = None
+ self.shadow_draw = None
+
+ def skip(self, height):
+ """Skips some vertical space."""
+ self.height += height
+
+ def text(self, text, color='#000', font=None, line_height=20,
+ shadow_color=None):
+ """Writes some centered text."""
+ text = re.sub(r'\s+', ' ', text)
+ if shadow_color:
+ if not self.shadow_img:
+ self.shadow_img = Image.new('RGBA', self.img.size)
+ self.shadow_draw = ImageDraw.Draw(self.shadow_img)
+ while text:
+ line = text
+ line_width = self.draw.textsize(line, font=font)[0]
+ while line_width > self.max_text_width:
+ parts = line.rsplit(' ', 1)
+ if len(parts) == 1:
+ line_width = self.max_text_width
+ break
+ line = parts[0]
+ line_width = self.draw.textsize(line, font=font)[0]
+ line = line.strip() + ' '
+
+ pos_x = (self.max_width - line_width) / 2
+
+ if shadow_color:
+ self.shadow_draw.text(
+ (pos_x + self.SHADOW_X, self.height + self.SHADOW_Y),
+ line, font=font, fill=shadow_color
+ )
+
+ self.draw.text((pos_x, self.height), line, font=font, fill=color)
+ self.height += line_height
+ # go to next line
+ text = text[len(line):]
+
+ def image(self):
+ """Creates the actual Image object."""
+ image = Image.new('RGBA', (self.max_width,
+ self.height + self.padding_y))
+ if self.shadow_img:
+ shadow = self.shadow_img.filter(ImageFilter.BLUR)
+ image.paste(shadow, (0, 0), shadow)
+ image.paste(self.img, (0, 0), self.img)
+ else:
+ image.paste(self.img, (0, 0))
+ return image
class Cover(object):
+ """Abstract base class for cover images generator."""
width = 600
height = 800
background_color = '#fff'
author_lineskip = 40
author_color = '#000'
author_shadow = None
- author_font = None
+ author_font_ttf = get_resource('fonts/DejaVuSerif.ttf')
+ author_font_size = 30
title_top = 100
title_margin_left = 20
title_lineskip = 54
title_color = '#000'
title_shadow = None
- title_font = None
+ title_font_ttf = get_resource('fonts/DejaVuSerif.ttf')
+ title_font_size = 40
logo_bottom = None
logo_width = None
+ uses_dc_cover = False
format = 'JPEG'
-
+ scale = 1
+ scale_after = 1
exts = {
'JPEG': 'jpg',
'PNG': 'image/png',
}
-
- @staticmethod
- def draw_centered_text(text, img, font, margin_left, width, pos_y, lineskip, color, shadow_color):
- if shadow_color:
- shadow_img = Image.new('RGBA', img.size)
- shadow_draw = ImageDraw.Draw(shadow_img)
- text_img = Image.new('RGBA', img.size)
- text_draw = ImageDraw.Draw(text_img)
- while text:
- line = text
- while text_draw.textsize(line, font=font)[0] > width:
- try:
- line, ext = line.rsplit(' ', 1)
- except:
- break
- pos_x = margin_left + (width - text_draw.textsize(line, font=font)[0]) / 2
- if shadow_color:
- shadow_draw.text((pos_x + 3, pos_y + 3), line, font=font, fill=shadow_color)
- text_draw.text((pos_x, pos_y), line, font=font, fill=color)
- pos_y += lineskip
- text = text[len(line)+1:]
- if shadow_color:
- shadow_img = shadow_img.filter(ImageFilter.BLUR)
- img.paste(shadow_img, None, shadow_img)
- img.paste(text_img, None, text_img)
- return pos_y
-
-
- def __init__(self, author='', title=''):
- self.author = author
- self.title = title
+ def __init__(self, book_info, format=None, width=None, height=None):
+ self.author = ", ".join(auth.readable() for auth in book_info.authors)
+ self.title = book_info.title
+ if format is not None:
+ self.format = format
+ if width and height:
+ self.height = height * self.width / width
+ scale = max(float(width or 0) / self.width, float(height or 0) / self.height)
+ if scale >= 1:
+ self.scale = scale
+ elif scale:
+ self.scale_after = scale
def pretty_author(self):
+ """Allows for decorating author's name."""
return self.author
def pretty_title(self):
+ """Allows for decorating title."""
return self.title
def image(self):
- img = Image.new('RGB', (self.width, self.height), self.background_color)
+ metr = Metric(self, self.scale)
+ img = Image.new('RGB', (metr.width, metr.height), self.background_color)
if self.background_img:
background = Image.open(self.background_img)
del background
# WL logo
- if self.logo_width:
+ if metr.logo_width:
logo = Image.open(get_resource('res/wl-logo.png'))
- logo = logo.resize((self.logo_width, logo.size[1] * self.logo_width / logo.size[0]))
- img.paste(logo, ((self.width - self.logo_width) / 2, img.size[1] - logo.size[1] - self.logo_bottom))
-
- author_font = self.author_font or ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 30)
- title_y = self.draw_centered_text(self.pretty_author(), img, author_font,
- self.author_margin_left, self.width - self.author_margin_left - self.author_margin_right, self.author_top,
- self.author_lineskip, self.author_color, self.author_shadow) + self.title_top
- title_font = self.title_font or ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 40)
- self.draw_centered_text(self.pretty_title(), img, title_font,
- self.title_margin_left, self.width - self.title_margin_left - self.title_margin_right, title_y,
- self.title_lineskip, self.title_color, self.title_shadow)
+ logo = logo.resize((metr.logo_width, logo.size[1] * metr.logo_width / logo.size[0]))
+ img.paste(logo, ((metr.width - metr.logo_width) / 2, img.size[1] - logo.size[1] - metr.logo_bottom))
+
+ top = metr.author_top
+ tbox = TextBox(
+ metr.width - metr.author_margin_left - metr.author_margin_right,
+ metr.height - top,
+ )
+
+ author_font = ImageFont.truetype(
+ self.author_font_ttf, metr.author_font_size)
+ tbox.text(self.pretty_author(), self.author_color, author_font, metr.author_lineskip, self.author_shadow)
+ text_img = tbox.image()
+ img.paste(text_img, (metr.author_margin_left, top), text_img)
+
+ top += text_img.size[1] + metr.title_top
+ tbox = TextBox(
+ metr.width - metr.title_margin_left - metr.title_margin_right,
+ metr.height - top,
+ )
+ title_font = ImageFont.truetype(
+ self.title_font_ttf, metr.title_font_size)
+ tbox.text(self.pretty_title(), self.title_color, title_font, metr.title_lineskip, self.title_shadow)
+ text_img = tbox.image()
+ img.paste(text_img, (metr.title_margin_left, top), text_img)
+
+ return img
+ def final_image(self):
+ img = self.image()
+ if self.scale_after != 1:
+ img = img.resize((
+ int(round(img.size[0] * self.scale_after)),
+ int(round(img.size[1] * self.scale_after))),
+ Image.ANTIALIAS)
return img
def mime_type(self):
return self.exts[self.format]
def save(self, *args, **kwargs):
- return self.image().save(format=self.format, *args, **kwargs)
+ default_kwargs = {
+ 'format': self.format,
+ 'quality': 95,
+ }
+ default_kwargs.update(kwargs)
+ return self.final_image().save(*args, **default_kwargs)
+
+ def output_file(self, *args, **kwargs):
+ imgstr = StringIO()
+ self.save(imgstr, *args, **kwargs)
+ return OutputFile.from_string(imgstr.getvalue())
+class WLCover(Cover):
+ """Wolne Lektury cover without logos."""
+ width = 600
+ height = 833
+ uses_dc_cover = True
+ author_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+ author_font_size = 20
+ author_lineskip = 30
+ title_font_ttf = get_resource('fonts/DejaVuSerif-Bold.ttf')
+ title_font_size = 30
+ title_lineskip = 40
+ title_box_width = 350
+
+ box_top_margin = 100
+ box_bottom_margin = 100
+ box_padding_y = 20
+ box_above_line = 10
+ box_below_line = 15
+ box_line_left = 75
+ box_line_right = 275
+ box_line_width = 2
+
+ logo_top = 15
+ logo_width = 140
+
+ bar_width = 35
+ bar_color = '#000'
+ box_position = 'middle'
+ background_color = '#444'
+ author_color = '#444'
+ background_img = get_resource('res/cover.png')
+ format = 'JPEG'
+
+ epoch_colors = {
+ u'Starożytność': '#9e3610',
+ u'Średniowiecze': '#564c09',
+ u'Renesans': '#8ca629',
+ u'Barok': '#a6820a',
+ u'Oświecenie': '#f2802e',
+ u'Romantyzm': '#db4b16',
+ u'Pozytywizm': '#961060',
+ u'Modernizm': '#7784e0',
+ u'Dwudziestolecie międzywojenne': '#3044cf',
+ u'Współczesność': '#06393d',
+ }
+
+ kind_box_position = {
+ u'Liryka': 'top',
+ u'Epika': 'bottom',
+ }
+
+ def __init__(self, book_info, format=None, width=None, height=None):
+ super(WLCover, self).__init__(book_info, format=format, width=width, height=height)
+ # Set box position.
+ self.box_position = book_info.cover_box_position or \
+ self.kind_box_position.get(book_info.kind, self.box_position)
+ # Set bar color.
+ if book_info.cover_bar_color == 'none':
+ self.bar_width = 0
+ else:
+ self.bar_color = book_info.cover_bar_color or \
+ self.epoch_colors.get(book_info.epoch, self.bar_color)
+ # Set title color.
+ self.title_color = self.epoch_colors.get(book_info.epoch, self.title_color)
+
+ if book_info.cover_url:
+ url = book_info.cover_url
+ bg_src = None
+ if bg_src is None:
+ bg_src = URLOpener().open(url)
+ self.background_img = StringIO(bg_src.read())
+ bg_src.close()
+
+ def pretty_author(self):
+ return self.author.upper()
+
+ def add_box(self, img):
+ if self.box_position == 'none':
+ return img
+
+ metr = Metric(self, self.scale)
+
+ # Write author name.
+ box = TextBox(metr.title_box_width, metr.height, padding_y=metr.box_padding_y)
+ author_font = ImageFont.truetype(
+ self.author_font_ttf, metr.author_font_size)
+ box.text(self.pretty_author(),
+ font=author_font,
+ line_height=metr.author_lineskip,
+ color=self.author_color,
+ shadow_color=self.author_shadow)
+
+ box.skip(metr.box_above_line)
+ box.draw.line((metr.box_line_left, box.height, metr.box_line_right, box.height),
+ fill=self.author_color, width=metr.box_line_width)
+ box.skip(metr.box_below_line)
+
+ # Write title.
+ title_font = ImageFont.truetype(
+ self.title_font_ttf, metr.title_font_size)
+ box.text(self.pretty_title(),
+ line_height=metr.title_lineskip,
+ font=title_font,
+ color=self.title_color,
+ shadow_color=self.title_shadow)
+
+ box_img = box.image()
+
+ # Find box position.
+ if self.box_position == 'top':
+ box_top = metr.box_top_margin
+ elif self.box_position == 'bottom':
+ box_top = metr.height - metr.box_bottom_margin - box_img.size[1]
+ else: # Middle.
+ box_top = (metr.height - box_img.size[1]) / 2
+
+ box_left = metr.bar_width + (metr.width - metr.bar_width - box_img.size[0]) / 2
+
+ # Draw the white box.
+ ImageDraw.Draw(img).rectangle(
+ (box_left, box_top, box_left + box_img.size[0], box_top + box_img.size[1]), fill='#fff')
+ # Paste the contents into the white box.
+ img.paste(box_img, (box_left, box_top), box_img)
+ return img
+
+ def image(self):
+ metr = Metric(self, self.scale)
+ img = Image.new('RGB', (metr.width, metr.height), self.background_color)
+ draw = ImageDraw.Draw(img)
+
+ draw.rectangle((0, 0, metr.bar_width, metr.height), fill=self.bar_color)
+
+ if self.background_img:
+ src = Image.open(self.background_img)
+ trg_size = (metr.width - metr.bar_width, metr.height)
+ if src.size[0] * trg_size[1] < src.size[1] * trg_size[0]:
+ resized = (
+ trg_size[0],
+ src.size[1] * trg_size[0] / src.size[0]
+ )
+ cut = (resized[1] - trg_size[1]) / 2
+ src = src.resize(resized, Image.ANTIALIAS)
+ src = src.crop((0, cut, src.size[0], src.size[1] - cut))
+ else:
+ resized = (
+ src.size[0] * trg_size[1] / src.size[1],
+ trg_size[1],
+ )
+ cut = (resized[0] - trg_size[0]) / 2
+ src = src.resize(resized, Image.ANTIALIAS)
+ src = src.crop((cut, 0, src.size[0] - cut, src.size[1]))
+
+ img.paste(src, (metr.bar_width, 0))
+ del src
+
+ img = self.add_box(img)
+
+ return img
+
+
+class LogoWLCover(WLCover):
+ gradient_height = 90
+ gradient_logo_height = 60
+ gradient_logo_margin_right = 30
+ gradient_logo_spacing = 40
+ gradient_color = '#000'
+ gradient_opacity = .6
+ gradient_logos = [
+ 'res/wl-logo-white.png',
+ 'res/fnp-logo-white.png',
+ ]
+
+ def image(self):
+ img = super(LogoWLCover, self).image()
+ metr = Metric(self, self.scale)
+ gradient = Image.new('RGBA', (metr.width - metr.bar_width, metr.gradient_height), self.gradient_color)
+ gradient_mask = Image.new('L', (metr.width - metr.bar_width, metr.gradient_height))
+ draw = ImageDraw.Draw(gradient_mask)
+ for line in range(0, metr.gradient_height):
+ draw.line(
+ (0, line, metr.width - metr.bar_width, line),
+ fill=int(255 * self.gradient_opacity * line / metr.gradient_height))
+ img.paste(gradient, (metr.bar_width, metr.height - metr.gradient_height), mask=gradient_mask)
+
+ cursor = metr.width - metr.gradient_logo_margin_right
+ logo_top = metr.height - metr.gradient_height / 2 - metr.gradient_logo_height / 2
+ for logo_path in self.gradient_logos[::-1]:
+ logo = Image.open(get_resource(logo_path))
+ logo = logo.resize(
+ (logo.size[0] * metr.gradient_logo_height / logo.size[1], metr.gradient_logo_height),
+ Image.ANTIALIAS)
+ cursor -= logo.size[0]
+ img.paste(logo, (cursor, logo_top), mask=logo)
+ cursor -= metr.gradient_logo_spacing
+
+ return img
+
+
+class EbookpointCover(LogoWLCover):
+ gradient_logo_height = 58
+ gradient_logo_spacing = 25
+ gradient_logos = [
+ 'res/ebookpoint-logo-white.png',
+ 'res/wl-logo-white.png',
+ 'res/fnp-logo-white.png',
+ ]
+
class VirtualoCover(Cover):
width = 600
author_lineskip = 60
author_color = '#fff'
author_shadow = '#000'
- author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
+ author_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
+ author_font_size = 50
title_top = 0
title_margin_left = 118
title_lineskip = 60
title_color = '#fff'
title_shadow = '#000'
- title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
+ title_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
+ title_font_size = 50
def pretty_title(self):
return u"„%s”" % self.title
author_margin_right = 233
author_lineskip = 156
author_color = '#d9d919'
- author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 130)
+ author_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+ author_font_size = 130
title_top = 400
title_margin_left = 307
title_margin_right = 233
title_lineskip = 168
title_color = '#d9d919'
- title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 140)
+ title_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+ title_font_size = 140
format = 'PNG'
width = 600
height = 730
background_img = get_resource('res/cover-gandalf.png')
- author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 30)
- title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 40)
+ author_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+ author_font_size = 30
+ title_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+ title_font_size = 40
logo_bottom = 25
logo_width = 250
format = 'PNG'
+
+
+DefaultEbookCover = LogoWLCover
fnp / librarian.git / blobdiff