+++ /dev/null
-# -*- coding: utf-8 -*-
-#
-# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-from __future__ import unicode_literals
-
-import re
-from PIL import Image, ImageFont, ImageDraw, ImageFilter
-from six import BytesIO
-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:
- return type(src)(self._scale * src)
- else:
- 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'
- background_img = None
-
- author_top = 100
- author_margin_left = 20
- author_margin_right = 20
- author_lineskip = 40
- author_color = '#000'
- author_shadow = None
- author_font_ttf = get_resource('fonts/DejaVuSerif.ttf')
- author_font_size = 30
-
- title_top = 100
- title_margin_left = 20
- title_margin_right = 20
- title_lineskip = 54
- title_color = '#000'
- title_shadow = 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': 'png',
- }
-
- mime_types = {
- 'JPEG': 'image/jpeg',
- 'PNG': 'image/png',
- }
-
- 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 = int(round(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):
- 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)
- img.paste(background, None, background)
- del background
-
- # WL logo
- if metr.logo_width:
- logo = Image.open(get_resource('res/wl-logo.png'))
- logo = logo.resize((metr.logo_width, int(round(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.mime_types[self.format]
-
- def ext(self):
- return self.exts[self.format]
-
- def save(self, *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 = BytesIO()
- self.save(imgstr, *args, **kwargs)
- return OutputFile.from_bytes(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, bleed=0):
- 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)
-
- self.bleed = bleed
- self.box_top_margin += bleed
- self.box_bottom_margin += bleed
- self.bar_width += bleed
-
- 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 = BytesIO(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 add_cut_lines(self, img):
- line_ratio = 0.5
- if self.bleed == 0:
- return img
- metr = Metric(self, self.scale)
- draw = ImageDraw.Draw(img)
- for corner_x, corner_y in ((0, 0), (metr.width, 0), (0, metr.height), (metr.width, metr.height)):
- dir_x = 1 if corner_x == 0 else -1
- dir_y = 1 if corner_y == 0 else -1
- for offset in (-1, 0, 1):
- draw.line((corner_x, corner_y + dir_y * metr.bleed + offset,
- corner_x + dir_x * metr.bleed * line_ratio, corner_y + dir_y * metr.bleed + offset),
- fill='black' if offset == 0 else 'white', width=1)
- draw.line((corner_x + dir_x * metr.bleed + offset, corner_y,
- corner_x + dir_x * metr.bleed + offset, corner_y + dir_y * metr.bleed * line_ratio),
- fill='black' if offset == 0 else 'white', width=1)
- 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],
- int(round(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 = (
- int(round(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)
-
- # img = self.add_cut_lines(img)
-
- return img
-
-
-class WLNoBoxCover(WLCover):
- def add_box(self, 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 __init__(self, book_info, *args, **kwargs):
- super(LogoWLCover, self).__init__(book_info, *args, **kwargs)
- self.gradient_height += self.bleed
- self.gradient_logo_margin_right += self.bleed
-
- self.additional_cover_logos = [
- BytesIO(URLOpener().open(cover_logo_url).read())
- for cover_logo_url in book_info.cover_logo_urls
- ]
-
- 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 = int(metr.height - metr.gradient_height / 2 - metr.gradient_logo_height / 2 - metr.bleed / 2)
-
- logos = [get_resource(logo_path) for logo_path in self.gradient_logos[::-1]]
- logos = logos + self.additional_cover_logos
- logos = [Image.open(logo_bytes).convert('RGBA') for logo_bytes in logos]
-
- # See if logos fit into the gradient. If not, scale down accordingly.
- space_for_logos = metr.width - metr.bar_width - 2 * metr.gradient_logo_margin_right
- widths = [logo.size[0] * metr.gradient_logo_height / logo.size[1] for logo in logos]
- taken_space = sum(widths) + (len(logos) - 1) * (metr.gradient_logo_spacing)
- logo_scale = space_for_logos / taken_space if taken_space > space_for_logos else 1
- logo_top += int(metr.gradient_logo_height * (1 - logo_scale) / 2)
-
- for i, logo in enumerate(logos):
- logo = logo.resize(
- (
- int(round(widths[i] * logo_scale)),
- int(round(metr.gradient_logo_height * logo_scale))
- ),
- Image.ANTIALIAS)
- cursor -= logo.size[0]
- img.paste(logo, (cursor, logo_top), mask=logo)
- cursor -= int(round(metr.gradient_logo_spacing * logo_scale))
-
- 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
- height = 730
- author_top = 73
- title_top = 73
- logo_bottom = 25
- logo_width = 250
-
-
-class PrestigioCover(Cover):
- width = 580
- height = 783
- background_img = get_resource('res/cover-prestigio.png')
-
- author_top = 446
- author_margin_left = 118
- author_margin_right = 62
- author_lineskip = 60
- author_color = '#fff'
- author_shadow = '#000'
- author_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
- author_font_size = 50
-
- title_top = 0
- title_margin_left = 118
- title_margin_right = 62
- title_lineskip = 60
- title_color = '#fff'
- title_shadow = '#000'
- title_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
- title_font_size = 50
-
- def pretty_title(self):
- return u"„%s”" % self.title
-
-
-class BookotekaCover(Cover):
- width = 2140
- height = 2733
- background_img = get_resource('res/cover-bookoteka.png')
-
- author_top = 480
- author_margin_left = 307
- author_margin_right = 233
- author_lineskip = 156
- author_color = '#d9d919'
- 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_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
- title_font_size = 140
-
- format = 'PNG'
-
-
-class GandalfCover(Cover):
- width = 600
- height = 730
- background_img = get_resource('res/cover-gandalf.png')
- 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'
-
-
-class KMLUCover(LogoWLCover):
- gradient_logo_height = 58
- gradient_logo_spacing = 25
- gradient_logos = [
- 'res/kmlu-logo-white.png',
- 'res/wl-logo-white.png',
- 'res/fnp-logo-white.png',
- ]
-
-
-class MPWCover(LogoWLCover):
- gradient_logo_height = 58
- gradient_logo_spacing = 25
- gradient_logos = [
- 'res/mpw-logo-white.png',
- 'res/wl-logo-white.png',
- 'res/fnp-logo-white.png',
- ]
-
-
-class AtriumCover(LogoWLCover):
- gradient_logo_height = 58
- gradient_logo_spacing = 25
- gradient_logos = [
- 'res/atrium-logo.png',
- 'res/wl-logo-white.png',
- 'res/fnp-logo-white.png',
- ]
-
-
-COVER_CLASSES = {
- 'default': LogoWLCover,
- 'kmlu': KMLUCover,
- 'mpw': MPWCover,
- 'atrium': AtriumCover,
-}
-
-
-def make_cover(book_info, *args, **kwargs):
- if 'cover_class' in kwargs:
- cover_class_name = kwargs.pop('cover_class')
- else:
- cover_class_name = book_info.cover_class
- cover_class = COVER_CLASSES[cover_class_name]
- return cover_class(book_info, *args, **kwargs)
fnp / librarian.git / blobdiff