# 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
-from librarian import get_resource
+import re
+from PIL import Image, ImageFont, ImageDraw, ImageFilter, ImageEnhance
+from StringIO import StringIO
+from librarian import get_resource, OutputFile, URLOpener
+from os import path
+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 cover(width, height, author, title):
- def draw_centered_text(text, draw, font, width, pos_y, lineskip):
+ 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
- while draw.textsize(line, font=font)[0] > width:
- try:
- line, ext = line.rsplit(' ', 1)
- except:
+ 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
- draw.text(((img.size[0] - draw.textsize(line, font=font)[0]) / 2, pos_y), line, font=font, fill='#000')
- pos_y += lineskip
- text = text[len(line)+1:]
- return pos_y
+ 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
+
+ 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
+ scale = max(float(width or 0) / self.width, float(height or 0) / self.height)
+ if scale:
+ self.scale = 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, 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 mime_type(self):
+ return self.mime_types[self.format]
+
+ def ext(self):
+ return self.exts[self.format]
+
+ def save(self, *args, **kwargs):
+ return self.image().save(format=self.format, quality=95, *args, **kwargs)
+
+ def output_file(self, *args, **kwargs):
+ imgstr = StringIO()
+ self.save(imgstr, *args, **kwargs)
+ return OutputFile.from_string(imgstr.getvalue())
+
+
+class WLCover(Cover):
+ """Default Wolne Lektury cover generator."""
+ 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
+ background_color = '#444'
+ author_color = '#444'
+ default_background = 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',
+ }
+
+ def __init__(self, book_info, format=None, width=None, height=None, with_logo=False):
+ super(WLCover, self).__init__(book_info, format=format, width=width, height=height)
+ self.kind = book_info.kind
+ self.epoch = book_info.epoch
+ 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()
+ else:
+ self.background_img = self.default_background
+
+ def pretty_author(self):
+ return self.author.upper()
+
+ def image(self):
+ metr = Metric(self, self.scale)
+ img = Image.new('RGB', (metr.width, metr.height), self.background_color)
+ draw = ImageDraw.Draw(img)
+
+ if self.epoch in self.epoch_colors:
+ epoch_color = self.epoch_colors[self.epoch]
+ else:
+ epoch_color = '#000'
+ draw.rectangle((0, 0, metr.bar_width, metr.height), fill=epoch_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
+
+ 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)
+
+ 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=epoch_color,
+ shadow_color=self.title_shadow,
+ )
+
+ if self.with_logo:
+ logo = Image.open(get_resource('res/wl-logo-mono.png'))
+ logo = logo.resize((metr.logo_width, logo.size[1] * metr.logo_width / logo.size[0]), Image.ANTIALIAS)
+ alpha = logo.split()[3]
+ alpha = ImageEnhance.Brightness(alpha).enhance(.75)
+ logo.putalpha(alpha)
+ box.skip(metr.logo_top + logo.size[1])
+
+ box_img = box.image()
+
+ if self.kind == 'Liryka':
+ # top
+ box_top = metr.box_top_margin
+ elif self.kind == 'Epika':
+ # bottom
+ box_top = metr.height - metr.box_bottom_margin - box_img.size[1]
+ else:
+ # center
+ 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.rectangle((box_left, box_top,
+ box_left + box_img.size[0], box_top + box_img.size[1]),
+ fill='#fff')
+ img.paste(box_img, (box_left, box_top), box_img)
+
+ if self.with_logo:
+ img.paste(logo,
+ (box_left + (box_img.size[0] - logo.size[0]) / 2,
+ box_top + box_img.size[1] - metr.box_padding_y - logo.size[1]), mask=logo)
+
+ return img
+
+
+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 FutureOfCopyrightCover(Cover):
+ width = 402
+ height = 595
+ background_img = 'cover.png'
+ format = 'PNG'
+
+ def save(self, dest):
+ dest.write(open(self.background_img).read())
- img = Image.new('RGB', (width, height), (255, 255, 255))
- # WL logo
- logo = Image.open(get_resource('pdf/wl-logo.png'))
- logo = logo.resize((img.size[0] / 2, logo.size[1] * img.size[0] / 2 / logo.size[0]))
- img.paste(logo, (width / 4, img.size[1] - logo.size[1]))
+class CoverFromFile(Cover):
+ def __init__(self, filename, *args, **kwargs):
+ super(CoverFromFile, self).__init__(*args, **kwargs)
- draw = ImageDraw.Draw(img)
- author_font = ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), width/20)
- title_y = draw_centered_text(author, draw, author_font, width*9/10, height/10, width/15) + height/10
+ self.background_img = filename
- title_font = ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), width/15)
- draw_centered_text(title, draw, title_font, width*9/10, title_y, width/11)
+ self.img = Image.open(filename)
+ (self.width, self.height) = self.img.size
- return img
+ self.format = path.splitext(filename)[-1][1:].upper()
+
+ def image(self):
+ return self.img
fnp / librarian.git / blobdiff