X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/387bff61a13e750e1ef4e015025415a8b311b25b..cf4dc6946d3afec0ed5dea88c8d833c017d97bf0:/librarian/cover.py?ds=inline

diff --git a/librarian/cover.py b/librarian/cover.py
index 8aa9abe..0b7a176 100644
--- a/librarian/cover.py
+++ b/librarian/cover.py
@@ -3,78 +3,509 @@
 # 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, OutputFile, URLOpener
 
 
-def cover(author, title,
-          width, height, background_color, background_img,
-          author_top, author_margin_left, author_margin_right, author_lineskip, author_color, author_font, author_shadow,
-          title_top, title_margin_left, title_margin_right, title_lineskip, title_color, title_font, title_shadow,
-          logo_width, logo_bottom
-          ):
-    def draw_centered_text(text, img, font, margin_left, width, pos_y, lineskip, color, shadow_color):
+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 __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:
-            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)
+            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 text_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
-            pos_x = margin_left + (width - text_draw.textsize(line, font=font)[0]) / 2
+                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:
-                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
-
-
-    img = Image.new('RGB', (width, height), background_color)
-
-    if background_img:
-        background = Image.open(background_img)
-        img.paste(background, None, background)
-        del background
-
-    # WL logo
-    if logo_width:
-        logo = Image.open(get_resource('res/wl-logo.png'))
-        logo = logo.resize((logo_width, logo.size[1] * logo_width / logo.size[0]))
-        img.paste(logo, ((width - logo_width) / 2, img.size[1] - logo.size[1] - logo_bottom))
-
-    title_y = draw_centered_text(author, img, author_font,
-                    author_margin_left, width - author_margin_left - author_margin_right, author_top,
-                    author_lineskip, author_color, author_shadow) + title_top
-    draw_centered_text(title, img, title_font,
-                    title_margin_left, width - title_margin_left - title_margin_right, title_y,
-                    title_lineskip, title_color, title_shadow)
-
-    return img
-
-
-def virtualo_cover(author, title):
-    return cover(author, title,
-          600, 730, '#fff', None,
-          73, 20, 20, 40, '#000', ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 30), None,
-          73, 20, 20, 54, '#000', ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 40), None,
-          300, 0
-          )
-
-def prestigio_cover(author, title):
-    return cover(author, u"„%s”" % title,
-          580, 783, '#fff', get_resource('res/cover-prestigio.png'),
-          446, 118, 62, 60, '#fff', ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50), '#000',
-          0, 118, 62, 60, '#fff', ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50), '#000',
-          None, None
-          )
+                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
+    scale_after = 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
+        if width and height:
+            self.height = height * self.width / width
+        scale = max(float(width or 0) / self.width, float(height or 0) / self.height)
+        if scale >= 1:
+            self.scale = scale
+        elif scale:
+            self.scale_after = 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 final_image(self):
+        img = self.image()
+        if self.scale_after != 1:
+            img = img.resize((
+                    int(round(img.size[0] * self.scale_after)),
+                    int(round(img.size[1] * self.scale_after))),
+                Image.ANTIALIAS)
+        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):
+        default_kwargs = {
+                'format': self.format,
+                'quality': 95,
+        }
+        default_kwargs.update(kwargs)
+        return self.final_image().save(*args, **default_kwargs)
+
+    def output_file(self, *args, **kwargs):
+        imgstr = StringIO()
+        self.save(imgstr, *args, **kwargs)
+        return OutputFile.from_string(imgstr.getvalue())
+
+
+class WLCover(Cover):
+    """Wolne Lektury cover without logos."""
+    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
+    bar_color = '#000'
+    box_position = 'middle'
+    background_color = '#444'
+    author_color = '#444'
+    background_img = 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',
+    }
+
+    kind_box_position = {
+        u'Liryka': 'top',
+        u'Epika': 'bottom',
+    }
+
+    def __init__(self, book_info, format=None, width=None, height=None):
+        super(WLCover, self).__init__(book_info, format=format, width=width, height=height)
+        # Set box position.
+        self.box_position = book_info.cover_box_position or \
+            self.kind_box_position.get(book_info.kind, self.box_position)
+        # Set bar color.
+        if book_info.cover_bar_color == 'none':
+            self.bar_width = 0
+        else:
+            self.bar_color = book_info.cover_bar_color or \
+                self.epoch_colors.get(book_info.epoch, self.bar_color)
+        # Set title color.
+        self.title_color = self.epoch_colors.get(book_info.epoch, self.title_color)
+
+        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()
+
+    def pretty_author(self):
+        return self.author.upper()
+
+    def add_box(self, img):
+        if self.box_position == 'none':
+            return img
+
+        metr = Metric(self, self.scale)
+
+        # Write author name.
+        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)
+
+        # Write title.
+        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=self.title_color,
+                 shadow_color=self.title_shadow)
+
+        box_img = box.image()
+
+        # Find box position.
+        if self.box_position == 'top':
+            box_top = metr.box_top_margin
+        elif self.box_position == 'bottom':
+            box_top = metr.height - metr.box_bottom_margin - box_img.size[1]
+        else:   # Middle.
+            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 the white box.
+        ImageDraw.Draw(img).rectangle(
+            (box_left, box_top, box_left + box_img.size[0], box_top + box_img.size[1]), fill='#fff')
+        # Paste the contents into the white box.
+        img.paste(box_img, (box_left, box_top), box_img)
+        return img
+
+    def image(self):
+        metr = Metric(self, self.scale)
+        img = Image.new('RGB', (metr.width, metr.height), self.background_color)
+        draw = ImageDraw.Draw(img)
+
+        draw.rectangle((0, 0, metr.bar_width, metr.height), fill=self.bar_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
+
+        img = self.add_box(img)
+
+        return img
+
+
+class LogoWLCover(WLCover):
+    gradient_height = 90
+    gradient_logo_height = 60
+    gradient_logo_margin_right = 30
+    gradient_logo_spacing = 40
+    gradient_color = '#000'
+    gradient_opacity = .6
+    gradient_logos = [
+        'res/wl-logo-white.png',
+        'res/fnp-logo-white.png',
+    ]
+
+    def image(self):
+        img = super(LogoWLCover, self).image()
+        metr = Metric(self, self.scale)
+        gradient = Image.new('RGBA', (metr.width - metr.bar_width, metr.gradient_height), self.gradient_color)
+        gradient_mask = Image.new('L', (metr.width - metr.bar_width, metr.gradient_height))
+        draw = ImageDraw.Draw(gradient_mask)
+        for line in range(0, metr.gradient_height):
+            draw.line(
+                (0, line, metr.width - metr.bar_width, line),
+                fill=int(255 * self.gradient_opacity * line / metr.gradient_height))
+        img.paste(gradient, (metr.bar_width, metr.height - metr.gradient_height), mask=gradient_mask)
+
+        cursor = metr.width - metr.gradient_logo_margin_right
+        logo_top = metr.height - metr.gradient_height / 2 - metr.gradient_logo_height / 2
+        for logo_path in self.gradient_logos[::-1]:
+            logo = Image.open(get_resource(logo_path))
+            logo = logo.resize(
+                (logo.size[0] * metr.gradient_logo_height / logo.size[1], metr.gradient_logo_height),
+                Image.ANTIALIAS)
+            cursor -= logo.size[0]
+            img.paste(logo, (cursor, logo_top), mask=logo)
+            cursor -= metr.gradient_logo_spacing
+
+        return img
+
+
+class EbookpointCover(LogoWLCover):
+    gradient_logo_height = 58
+    gradient_logo_spacing = 25
+    gradient_logos = [
+        'res/ebookpoint-logo-white.png',
+        'res/wl-logo-white.png',
+        'res/fnp-logo-white.png',
+    ]
+
+
+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'
+
 
+DefaultEbookCover = LogoWLCover