from librarian import get_resource
+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, shortener=None):
+ """Writes some centered 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:
+ if shortener:
+ for line in shortener(text):
+ if text_draw.textsize(line, font=font)[0] <= self.max_text_width:
+ break
+ text = ''
+ else:
+ 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):]
+
+ @staticmethod
+ def person_shortener(text):
+ yield text
+ chunks = text.split()
+ n_chunks = len(chunks)
+ # make initials from given names, starting from last
+ for i in range(n_chunks - 2, -1, -1):
+ chunks[i] = chunks[i][0] + '.'
+ yield " ".join(chunks)
+ # remove given names initials, starting from last
+ while len(chunks) > 2:
+ del chunks[1]
+ yield " ".join(chunks)
+
+ @staticmethod
+ def title_shortener(text):
+ yield text
+ chunks = text.split()
+ n_chunks = len(chunks)
+ # remove words, starting from last one
+ while len(chunks) > 1:
+ del chunks[-1]
+ yield " ".join(chunks) + u'…'
+
+ 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_align = 'c'
author_top = 100
author_margin_left = 20
author_margin_right = 20
author_color = '#000'
author_shadow = None
author_font = None
+ author_wrap = True
+ title_align = 'c'
title_top = 100
title_margin_left = 20
title_margin_right = 20
title_color = '#000'
title_shadow = None
title_font = None
+ title_wrap = True
logo_bottom = None
logo_width = None
+ uses_dc_cover = False
format = 'JPEG'
-
exts = {
'JPEG': 'jpg',
'PNG': 'png',
'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):
+ self.author = ", ".join(auth.readable() for auth in book_info.authors)
+ self.title = book_info.title
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):
if self.background_img:
background = Image.open(self.background_img)
- img.paste(background, None, background)
+ try:
+ img.paste(background, None, background)
+ except ValueError, e:
+ img.paste(background)
del background
# WL logo
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)
+ author_shortener = None if self.author_wrap else TextBox.person_shortener
+ tbox.text(self.pretty_author(), self.author_color, author_font,
+ self.author_lineskip, self.author_shadow, author_shortener)
+ 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)
+ title_shortener = None if self.title_wrap else TextBox.title_shortener
+ tbox.text(self.pretty_title(), self.title_color, title_font,
+ self.title_lineskip, self.title_shadow, title_shortener)
+ text_img = tbox.image()
+ img.paste(text_img, (self.title_margin_left, top), text_img)
return img
return self.image().save(format=self.format, *args, **kwargs)
+class WLCover(Cover):
+ """Default Wolne Lektury cover generator."""
+ uses_dc_cover = True
+ author_font = ImageFont.truetype(
+ get_resource('fonts/JunicodeWL-Regular.ttf'), 20)
+ author_lineskip = 30
+ title_font = ImageFont.truetype(
+ get_resource('fonts/DejaVuSerif-Bold.ttf'), 30)
+ title_lineskip = 40
+ title_box_width = 350
+ bar_width = 35
+ background_color = '#444'
+ author_color = '#444'
+
+ epochs = {
+ u'Starożytność': 0,
+ u'Średniowiecze': 30,
+ u'Renesans': 60,
+ u'Barok': 90,
+ u'Oświecenie': 120,
+ u'Romantyzm': 150,
+ u'Pozytywizm': 180,
+ u'Modernizm': 210,
+ u'Dwudziestolecie międzywojenne': 240,
+ u'Współczesność': 270,
+ }
+
+ def __init__(self, book_info):
+ super(WLCover, self).__init__(book_info)
+ self.kind = book_info.kind
+ self.epoch = book_info.epoch
+ if book_info.cover_url:
+ from urllib2 import urlopen
+ from StringIO import StringIO
+
+ bg_src = urlopen(book_info.cover_url)
+ self.background_img = StringIO(bg_src.read())
+ bg_src.close()
+
+ def pretty_author(self):
+ return self.author.upper()
+
+ def image(self):
+ from colorsys import hsv_to_rgb
+
+ img = Image.new('RGB', (self.width, self.height), self.background_color)
+ draw = ImageDraw.Draw(img)
+
+ if self.epoch in self.epochs:
+ epoch_color = tuple(int(255 * c) for c in hsv_to_rgb(
+ float(self.epochs[self.epoch]) / 360, .7, .7))
+ else:
+ epoch_color = '#000'
+ draw.rectangle((0, 0, self.bar_width, self.height), fill=epoch_color)
+
+ if self.background_img:
+ src = Image.open(self.background_img)
+ trg_size = (self.width - self.bar_width, self.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)
+ 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)
+ src = src.crop((cut, 0, src.size[0] - cut, src.size[1]))
+
+ img.paste(src, (self.bar_width, 0))
+ del src
+
+ box = TextBox(self.title_box_width, self.height, padding_y=20)
+ box.text(self.pretty_author(),
+ font=self.author_font,
+ line_height=self.author_lineskip,
+ color=self.author_color,
+ shadow_color=self.author_shadow,
+ )
+
+ box.skip(10)
+ box.draw.line((75, box.height, 275, box.height),
+ fill=self.author_color, width=2)
+ box.skip(15)
+
+ box.text(self.pretty_title(),
+ line_height=self.title_lineskip,
+ font=self.title_font,
+ color=epoch_color,
+ shadow_color=self.title_shadow,
+ )
+ box_img = box.image()
+
+ if self.kind == 'Liryka':
+ # top
+ box_top = 100
+ elif self.kind == 'Epika':
+ # bottom
+ box_top = self.height - 100 - box_img.size[1]
+ else:
+ # center
+ box_top = (self.height - box_img.size[1]) / 2
+
+ box_left = self.bar_width + (self.width - self.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)
+
+ return img
+
+
class VirtualoCover(Cover):
width = 600
logo_bottom = 25
logo_width = 250
format = 'PNG'
+
+
+class ArtaTechCover(Cover):
+ width = 600
+ height = 800
+ background_img = get_resource('res/cover-arta-tech.jpg')
+ author_top = 132
+ author_margin_left = 235
+ author_margin_right = 23
+ author_align = 'r'
+ author_font = ImageFont.truetype(get_resource('fonts/DroidSans.ttf'), 32)
+ author_color = '#555555'
+ author_wrap = False
+ title_top = 17
+ title_margin_right = 21
+ title_margin_left = 60
+ title_align = 'r'
+ title_font = ImageFont.truetype(get_resource('fonts/EBGaramond-Regular.ttf'), 42)
+ title_color = '#222222'
+ title_wrap = False
+ format = 'JPEG'
+
+ def pretty_author(self):
+ return self.author.upper()
+
+
+def ImageCover(img):
+ """ a class factory for simple image covers """
+ img = Image.open(img)
+
+ class ImgCover(Cover):
+ def image(self):
+ return img
+
+ @property
+ def format(self):
+ return self.image().format
+
+ return ImgCover
fnp / librarian.git / blobdiff