X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/12266a4397d9e344b7f95a19edc4a8df7cd5f9f0..a34b95aa7ba5fd4838541d1cdcd28358fb808062:/librarian/cover.py?ds=inline diff --git a/librarian/cover.py b/librarian/cover.py index 9070344..63e4aa0 100644 --- a/librarian/cover.py +++ b/librarian/cover.py @@ -7,7 +7,79 @@ import Image, ImageFont, ImageDraw, ImageFilter 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): + """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: + 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 +103,10 @@ class Cover(object): logo_bottom = None logo_width = None + uses_dc_cover = False format = 'JPEG' - exts = { 'JPEG': 'jpg', 'PNG': 'png', @@ -45,42 +117,16 @@ 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): + 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): @@ -97,14 +143,29 @@ 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 @@ -118,6 +179,125 @@ class Cover(object): 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