# 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, IOFile
+
+
+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'
logo_bottom = None
logo_width = None
+ uses_dc_cover = False
format = 'JPEG'
-
exts = {
'JPEG': 'jpg',
'PNG': 'png',
- }
+ }
mime_types = {
'JPEG': 'image/jpeg',
'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):
+ try:
+ self.author = ", ".join(auth.readable() for auth in book_info.authors)
+ except AttributeError:
+ self.author = ""
+ self.title = book_info.title
+ if format is not None:
+ self.format = format
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):
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)
+ top = self.author_top
+ tbox = TextBox(
+ self.width - self.author_margin_left - self.author_margin_right,
+ self.height - top)
+ author_font = self.author_font or ImageFont.truetype(
+ get_resource('fonts/DejaVuSerif.ttf'), 30)
+ tbox.text(self.pretty_author(), self.author_color, author_font,
+ self.author_lineskip, self.author_shadow)
+ text_img = tbox.image()
+ img.paste(text_img, (self.author_margin_left, top), text_img)
+
+ top += text_img.size[1] + self.title_top
+ tbox = TextBox(
+ self.width - self.title_margin_left - self.title_margin_right,
+ self.height - top)
+ title_font = self.author_font or ImageFont.truetype(
+ get_resource('fonts/DejaVuSerif.ttf'), 40)
+ tbox.text(self.pretty_title(), self.title_color, title_font,
+ self.title_lineskip, self.title_shadow)
+ text_img = tbox.image()
+ img.paste(text_img, (self.title_margin_left, top), text_img)
return img
def save(self, *args, **kwargs):
return self.image().save(format=self.format, *args, **kwargs)
+ def output_file(self, *args, **kwargs):
+ imgstr = StringIO()
+ self.save(imgstr, *args, **kwargs)
+ return IOFile.from_string(imgstr.getvalue())
-
-class VirtualoCover(Cover):
- width = 600
- height = 730
- author_top = 73
- title_top = 73
- logo_bottom = 0
- logo_width = 300
-
-
-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 = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
-
- title_top = 0
- title_margin_left = 118
- title_margin_right = 62
- title_lineskip = 60
- title_color = '#fff'
- title_shadow = '#000'
- title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 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 = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 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)
-
- format = 'PNG'
+ def for_pdf(self):
+ return IOFile.from_filename(get_resource('pdf/cover_image.sty'), {
+ 'cover.png': self.output_file(),
+ })
fnp / librarian.git / blobdiff