X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/d1a6d405c4b90823231d2d12365cc133fc0edfa8..724310b910f3ec0aeb2a1fbd0189d5f588a00f8f:/librarian/cover.py diff --git a/librarian/cover.py b/librarian/cover.py index f7d8f7d..7343e68 100644 --- a/librarian/cover.py +++ b/librarian/cover.py @@ -3,11 +3,86 @@ # 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' @@ -31,10 +106,10 @@ class Cover(object): logo_bottom = None logo_width = None + uses_dc_cover = False format = 'JPEG' - exts = { 'JPEG': 'jpg', 'PNG': 'png', @@ -45,42 +120,18 @@ class Cover(object): '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): + self.author = ", ".join(auth.readable() for auth in book_info.authors) + 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): @@ -97,14 +148,29 @@ class Cover(object): 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 @@ -117,77 +183,12 @@ class Cover(object): 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 WLCover(Cover): - author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 40) - title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50) - logo_width = 250 - logo_bottom = 20 - - - -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 = 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' - - -class GandalfCover(Cover): - 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) - logo_bottom = 25 - logo_width = 250 - format = 'PNG' + def for_pdf(self): + return IOFile.from_filename(get_resource('pdf/cover_image.sty'), { + 'cover.png': self.output_file(), + })