src/librarian/covers/marquise.py

   1 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Wolne Lektury. See NOTICE for more information.
   3 #
   4 import PIL.Image
   5 from librarian.cover import Cover, Metric
   6 from .utils.color import algo_contrast_or_hue, luminance, is_very_bright
   7 from .utils.textbox import DoesNotFit
   8 from .widgets.author import AuthorBox
   9 from .widgets.background import Background
  10 from .widgets.image import WLLogo, Label, LogoSticker
  11 from .widgets.marquise import Marquise
  12 from .widgets.title import TitleBox
  13
  14
  15 class MarquiseCover(Cover):
  16     additional_logos = []
  17     square_variant = False
  18
  19     width = 2100
  20     height = 2970
  21     margin = 100
  22     logo_h = 177
  23     author_width = 1400
  24     sticker_size = 400
  25     sticker_padding_x = 30
  26     sticker_padding_y = 50
  27     sticker_radius = 10
  28
  29     title_box_top = 262
  30
  31     color_schemes = [
  32         {
  33             'rgb': (0xc3, 0x27, 0x21),
  34             'text': '#000',
  35         },
  36         {
  37             'rgb': (0xa0, 0xbf, 0x38),
  38             'text': '#000',
  39         },
  40         {
  41             'rgb': (0xed, 0xc0, 0x16),
  42             'text': '#000',
  43         },
  44         {
  45             'rgb': (0x47, 0x66, 0x75),
  46             'text': '#fff',
  47         }
  48     ]
  49     for c in color_schemes:
  50         c['luminance'] = luminance(c['rgb'])
  51         cim = PIL.Image.new('RGB', (1, 1))
  52         cim.putpixel((0, 0), c['rgb'])
  53         cim.convert('HSV')
  54         c['hsv'] = cim.getpixel((0, 0))
  55
  56
  57     def set_size(self, final_width, final_height):
  58         if final_width is None:
  59             self.m = Metric(self, 1)
  60         else:
  61             if final_width > self.width:
  62                 self.m = Metric(self, final_width / self.width)
  63             else:
  64                 self.m = Metric(self, 1)
  65                 self.scale_after = final_width / self.width
  66
  67         if final_height is not None:
  68             self.height = round(final_height / self.scale_after / self.m._scale)
  69
  70         self.square_variant = self.height / self.width < 250 / 210
  71
  72         marquise_square_small = int(self.width / 2) - 300
  73         marquise_square_big = int(self.width / 2) - 100
  74         marquise_a4_small = 2970 - self.width
  75         marquise_a4_big = marquise_a4_small + 100
  76
  77         self.marquise_small = int(round(marquise_square_small + (marquise_a4_small - marquise_square_small) * (self.height - self.width) / (2970 - 2100)))
  78         self.marquise_big = int(round(marquise_square_big + (marquise_a4_big - marquise_square_big) * (self.height - self.width) / (2970 - 2100)))
  79         self.marquise_xl = self.marquise_big + 200
  80
  81         if self.marquise_small > self.marquise_big:
  82             self.marquise_small = self.marquise_big
  83
  84     def set_color_scheme_from(self, img):
  85         self.color_scheme = algo_contrast_or_hue(img, self.color_schemes)
  86         self.is_very_bright = is_very_bright(img)
  87
  88     def image(self):
  89         img = PIL.Image.new('RGB', (self.m.width, self.m.height), self.background_color)
  90
  91         if self.predesigned:
  92             bg = Background(self, crop_to_square=False)
  93             bg.apply(
  94                 img,
  95                 0, 0,
  96                 self.m.width, self.m.height
  97             )
  98         else:
  99             bg = Background(self)
 100             if self.square_variant:
 101                 layout_options = [
 102                     (self.m.marquise_small, 1),
 103                     (self.m.marquise_big, 2),
 104                     (self.m.marquise_big, 3),
 105                     (self.m.marquise_big, None),
 106                 ]
 107             else:
 108                 layout_options = [
 109                     (self.m.marquise_small, 2),
 110                     (self.m.marquise_small, 1),
 111                     (self.m.marquise_big, 3),
 112                     (self.m.marquise_xl, 4),
 113                     (self.m.marquise_xl, None),
 114                 ]
 115
 116             # Trying all the layout options with decreasing scale.
 117             title_box = None
 118             title_scale = 1
 119             while title_box is None:
 120                 for marquise_h, lines in layout_options:
 121                     title_box_height = marquise_h - self.m.title_box_top - self.m.margin
 122                     try:
 123                         title_box = TitleBox(
 124                             self,
 125                             self.m.width - 2 * self.m.margin,
 126                             title_box_height,
 127                             lines,
 128                             scale=title_scale
 129                         )
 130                     except DoesNotFit:
 131                         continue
 132                     else:
 133                         break
 134                 title_scale *= .99
 135
 136             self.marquise_height = marquise_h
 137             marquise = Marquise(self, self.marquise_height)
 138
 139             bg.apply(
 140                 img,
 141                 0, marquise.edge_top,
 142                 self.m.width, self.m.height - marquise.edge_top
 143             )
 144             self.set_color_scheme_from(
 145                 img.crop((
 146                     0, marquise.edge_top,
 147                     self.m.width, marquise.edge_top + (
 148                         self.m.height - marquise.edge_top
 149                     ) / 4
 150                 ))
 151             )
 152
 153             marquise.apply(
 154                 img, 0, 0, self.m.width
 155             )
 156             title_box.apply(
 157                 img,
 158                 marquise.title_box_position[0],
 159                 marquise.title_box_position[1],
 160             )
 161
 162             AuthorBox(self, self.m.author_width).apply(
 163                 img, self.m.width - self.m.margin - self.m.author_width, self.m.margin
 164             )
 165             WLLogo(self).apply(img, self.m.margin, self.m.margin, None, self.m.logo_h)
 166
 167
 168         if self.cover_logo:
 169             LogoSticker(self, self.cover_logo).apply(
 170                 img,
 171                 self.m.width - self.m.margin - self.m.sticker_size,
 172                 self.m.height - self.m.margin,
 173                 self.m.sticker_size, self.m.sticker_size, self.m.sticker_padding_x, self.m.sticker_padding_y, self.m.sticker_radius
 174             )
 175         for logo in self.additional_logos:
 176             LogoSticker(self, logo).apply(img, 0, 0)
 177
 178
 179         return img
 180
 181
 182
 183 class LabelMarquiseCover(MarquiseCover):
 184     label_left = 95
 185     label_top = 105
 186     label_w = 710
 187     label_h = 710
 188
 189     def image(self):
 190         img = super().image()
 191         if not self.predesigned:
 192             Label(self).apply(
 193                 img,
 194                 self.m.label_left,
 195                 self.marquise_height - self.label_top,
 196                 self.m.label_w,
 197                 self.m.label_h
 198             )
 199
 200         return img