X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/12266a4397d9e344b7f95a19edc4a8df7cd5f9f0..f318053fb3349c5364cfb866b2a3d33c2423e12a:/librarian/cover.py

diff --git a/librarian/cover.py b/librarian/cover.py
index 9070344..dfd451b 100644
--- a/librarian/cover.py
+++ b/librarian/cover.py
@@ -3,11 +3,99 @@
 # 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, ImageEnhance
+from StringIO import StringIO
+from librarian import get_resource, OutputFile, URLOpener
+
+
+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:
+            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'
@@ -19,7 +107,8 @@ class Cover(object):
     author_lineskip = 40
     author_color = '#000'
     author_shadow = None
-    author_font = None
+    author_font_ttf = get_resource('fonts/DejaVuSerif.ttf')
+    author_font_size = 30
 
     title_top = 100
     title_margin_left = 20
@@ -27,13 +116,15 @@ class Cover(object):
     title_lineskip = 54
     title_color = '#000'
     title_shadow = None
-    title_font = 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
 
     exts = {
         'JPEG': 'jpg',
@@ -45,46 +136,26 @@ 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, 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
+        scale = max(float(width or 0) / self.width, float(height or 0) / self.height)
+        if scale:
+            self.scale = 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):
-        img = Image.new('RGB', (self.width, self.height), self.background_color)
+        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)
@@ -92,19 +163,35 @@ class Cover(object):
             del background
 
         # WL logo
-        if self.logo_width:
+        if metr.logo_width:
             logo = Image.open(get_resource('res/wl-logo.png'))
-            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)
+            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
 
@@ -115,8 +202,166 @@ class Cover(object):
         return self.exts[self.format]
 
     def save(self, *args, **kwargs):
-        return self.image().save(format=self.format, *args, **kwargs)
+        return self.image().save(format=self.format, quality=95, *args, **kwargs)
+
+    def output_file(self, *args, **kwargs):
+        imgstr = StringIO()
+        self.save(imgstr, *args, **kwargs)
+        return OutputFile.from_string(imgstr.getvalue())
+
+
+class WLCover(Cover):
+    """Default Wolne Lektury cover generator."""
+    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
+    background_color = '#444'
+    author_color = '#444'
+    default_background = 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',
+    }
+
+    def __init__(self, book_info, format=None, width=None, height=None, with_logo=False):
+        super(WLCover, self).__init__(book_info, format=format, width=width, height=height)
+        self.kind = book_info.kind
+        self.epoch = book_info.epoch
+        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()
+        else:
+            self.background_img = self.default_background
 
+    def pretty_author(self):
+        return self.author.upper()
+
+    def image(self):
+        metr = Metric(self, self.scale)
+        img = Image.new('RGB', (metr.width, metr.height), self.background_color)
+        draw = ImageDraw.Draw(img)
+
+        if self.epoch in self.epoch_colors:
+            epoch_color = self.epoch_colors[self.epoch]
+        else:
+            epoch_color = '#000'
+        draw.rectangle((0, 0, metr.bar_width, metr.height), fill=epoch_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
+
+        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)
+
+        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=epoch_color,
+                 shadow_color=self.title_shadow,
+                )
+
+        if self.with_logo:
+            logo = Image.open(get_resource('res/wl-logo-mono.png'))
+            logo = logo.resize((metr.logo_width, logo.size[1] * metr.logo_width / logo.size[0]), Image.ANTIALIAS)
+            alpha = logo.split()[3]
+            alpha = ImageEnhance.Brightness(alpha).enhance(.75)
+            logo.putalpha(alpha)
+            box.skip(metr.logo_top + logo.size[1])
+
+        box_img = box.image()
+
+        if self.kind == 'Liryka':
+            # top
+            box_top = metr.box_top_margin
+        elif self.kind == 'Epika':
+            # bottom
+            box_top = metr.height - metr.box_bottom_margin - box_img.size[1]
+        else:
+            # center
+            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.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)
+
+        if self.with_logo:
+            img.paste(logo, 
+                (box_left + (box_img.size[0] - logo.size[0]) / 2,
+                    box_top + box_img.size[1] - metr.box_padding_y - logo.size[1]), mask=logo)
+
+        return img
 
 
 class VirtualoCover(Cover):
@@ -139,7 +384,8 @@ class PrestigioCover(Cover):
     author_lineskip = 60
     author_color = '#fff'
     author_shadow = '#000'
-    author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
+    author_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
+    author_font_size = 50
 
     title_top = 0
     title_margin_left = 118
@@ -147,7 +393,8 @@ class PrestigioCover(Cover):
     title_lineskip = 60
     title_color = '#fff'
     title_shadow = '#000'
-    title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
+    title_font_ttf = get_resource('fonts/JunicodeWL-Italic.ttf')
+    title_font_size = 50
 
     def pretty_title(self):
         return u"„%s”" % self.title
@@ -163,14 +410,16 @@ class BookotekaCover(Cover):
     author_margin_right = 233
     author_lineskip = 156
     author_color = '#d9d919'
-    author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 130)
+    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 = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 140)
+    title_font_ttf = get_resource('fonts/JunicodeWL-Regular.ttf')
+    title_font_size = 140
 
     format = 'PNG'
 
@@ -179,8 +428,10 @@ 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)
+    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'