Merge pull request #1860 from cincodenada/image-generation-add-cjk

Use Source Han Sans for preview images generation (bis)

bookwyrm/apps.py

@@ -0,0 +1,46 @@
+"""Do further startup configuration and initialization"""
+import os
+import urllib
+import logging
+
+from django.apps import AppConfig
+
+from bookwyrm import settings
+
+logger = logging.getLogger(__name__)
+
+
+def download_file(url, destination):
+    """Downloads a file to the given path"""
+    try:
+        # Ensure our destination directory exists
+        os.makedirs(os.path.dirname(destination))
+        with urllib.request.urlopen(url) as stream:
+            with open(destination, "b+w") as outfile:
+                outfile.write(stream.read())
+    except (urllib.error.HTTPError, urllib.error.URLError):
+        logger.error("Failed to download file %s", url)
+    except OSError:
+        logger.error("Couldn't open font file %s for writing", destination)
+    except:  # pylint: disable=bare-except
+        logger.exception("Unknown error in file download")
+
+
+class BookwyrmConfig(AppConfig):
+    """Handles additional configuration"""
+
+    name = "bookwyrm"
+    verbose_name = "BookWyrm"
+
+    def ready(self):
+        if settings.ENABLE_PREVIEW_IMAGES and settings.FONTS:
+            # Download any fonts that we don't have yet
+            logger.debug("Downloading fonts..")
+            for name, config in settings.FONTS.items():
+                font_path = os.path.join(
+                    settings.FONT_DIR, config["directory"], config["filename"]
+                )
+
+                if "url" in config and not os.path.exists(font_path):
+                    logger.info("Just a sec, downloading %s", name)
+                    download_file(config["url"], font_path)

bookwyrm/preview_images.py

@@ -4,6 +4,7 @@ import os
 import textwrap
 from io import BytesIO
 from uuid import uuid4
+import logging
 
 import colorsys
 from colorthief import ColorThief
@@ -17,34 +18,49 @@ from django.db.models import Avg
 from bookwyrm import models, settings
 from bookwyrm.tasks import app
 
+logger = logging.getLogger(__name__)
 
 IMG_WIDTH = settings.PREVIEW_IMG_WIDTH
 IMG_HEIGHT = settings.PREVIEW_IMG_HEIGHT
 BG_COLOR = settings.PREVIEW_BG_COLOR
 TEXT_COLOR = settings.PREVIEW_TEXT_COLOR
 DEFAULT_COVER_COLOR = settings.PREVIEW_DEFAULT_COVER_COLOR
+DEFAULT_FONT = settings.PREVIEW_DEFAULT_FONT
 TRANSPARENT_COLOR = (0, 0, 0, 0)
 
 margin = math.floor(IMG_HEIGHT / 10)
 gutter = math.floor(margin / 2)
 inner_img_height = math.floor(IMG_HEIGHT * 0.8)
 inner_img_width = math.floor(inner_img_height * 0.7)
-font_dir = os.path.join(settings.STATIC_ROOT, "fonts/public_sans")
 
 
-def get_font(font_name, size=28):
-    """Loads custom font"""
-    if font_name == "light":
-        font_path = os.path.join(font_dir, "PublicSans-Light.ttf")
-    if font_name == "regular":
-        font_path = os.path.join(font_dir, "PublicSans-Regular.ttf")
-    elif font_name == "bold":
-        font_path = os.path.join(font_dir, "PublicSans-Bold.ttf")
+def get_imagefont(name, size):
+    """Loads an ImageFont based on config"""
+    try:
+        config = settings.FONTS[name]
+        path = os.path.join(settings.FONT_DIR, config["directory"], config["filename"])
+        return ImageFont.truetype(path, size)
+    except KeyError:
+        logger.error("Font %s not found in config", name)
+    except OSError:
+        logger.error("Could not load font %s from file", name)
+
+    return ImageFont.load_default()
+
+
+def get_font(weight, size=28):
+    """Gets a custom font with the given weight and size"""
+    font = get_imagefont(DEFAULT_FONT, size)
 
     try:
-        font = ImageFont.truetype(font_path, size)
-    except OSError:
-        font = ImageFont.load_default()
+        if weight == "light":
+            font.set_variation_by_name("Light")
+        if weight == "bold":
+            font.set_variation_by_name("Bold")
+        if weight == "regular":
+            font.set_variation_by_name("Regular")
+    except AttributeError:
+        pass
 
     return font
 

bookwyrm/settings.py

@@ -35,6 +35,9 @@ LOCALE_PATHS = [
 ]
 LANGUAGE_COOKIE_NAME = env.str("LANGUAGE_COOKIE_NAME", "django_language")
 
+STATIC_ROOT = os.path.join(BASE_DIR, env("STATIC_ROOT", "static"))
+MEDIA_ROOT = os.path.join(BASE_DIR, env("MEDIA_ROOT", "images"))
+
 DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
 
 # Preview image
@@ -44,6 +47,17 @@ PREVIEW_TEXT_COLOR = env.str("PREVIEW_TEXT_COLOR", "#363636")
 PREVIEW_IMG_WIDTH = env.int("PREVIEW_IMG_WIDTH", 1200)
 PREVIEW_IMG_HEIGHT = env.int("PREVIEW_IMG_HEIGHT", 630)
 PREVIEW_DEFAULT_COVER_COLOR = env.str("PREVIEW_DEFAULT_COVER_COLOR", "#002549")
+PREVIEW_DEFAULT_FONT = env.str("PREVIEW_DEFAULT_FONT", "Source Han Sans")
+
+FONTS = {
+    # pylint: disable=line-too-long
+    "Source Han Sans": {
+        "directory": "source_han_sans",
+        "filename": "SourceHanSans-VF.ttf.ttc",
+        "url": "https://github.com/adobe-fonts/source-han-sans/raw/release/Variable/OTC/SourceHanSans-VF.ttf.ttc",
+    }
+}
+FONT_DIR = os.path.join(STATIC_ROOT, "fonts")
 
 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/
@@ -150,6 +164,9 @@ LOGGING = {
             "handlers": ["console", "mail_admins"],
             "level": LOG_LEVEL,
         },
+        "django.utils.autoreload": {
+            "level": "INFO",
+        },
         # Add a bookwyrm-specific logger
         "bookwyrm": {
             "handlers": ["console"],
@@ -311,13 +328,8 @@ if USE_S3:
     MEDIA_FULL_URL = MEDIA_URL
     STATIC_FULL_URL = STATIC_URL
     DEFAULT_FILE_STORAGE = "bookwyrm.storage_backends.ImagesStorage"
-    # I don't know if it's used, but the site crashes without it
-    STATIC_ROOT = os.path.join(BASE_DIR, env("STATIC_ROOT", "static"))
-    MEDIA_ROOT = os.path.join(BASE_DIR, env("MEDIA_ROOT", "images"))
 else:
     STATIC_URL = "/static/"
-    STATIC_ROOT = os.path.join(BASE_DIR, env("STATIC_ROOT", "static"))
     MEDIA_URL = "/images/"
     MEDIA_FULL_URL = f"{PROTOCOL}://{DOMAIN}{MEDIA_URL}"
     STATIC_FULL_URL = f"{PROTOCOL}://{DOMAIN}{STATIC_URL}"
-    MEDIA_ROOT = os.path.join(BASE_DIR, env("MEDIA_ROOT", "images"))

bookwyrm/static/fonts/source_han_sans/LICENSE.txt

@@ -0,0 +1,96 @@
+Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font
+Name 'Source'. Source is a trademark of Adobe in the United States
+and/or other countries.
+
+This Font Software is licensed under the SIL Open Font License,
+Version 1.1.
+
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font
+creation efforts of academic and linguistic communities, and to
+provide a free and open framework in which fonts may be shared and
+improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply to
+any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software
+components as distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to,
+deleting, or substituting -- in part or in whole -- any of the
+components of the Original Version, by changing formats or by porting
+the Font Software to a new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed,
+modify, redistribute, and sell modified and unmodified copies of the
+Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in
+Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the
+corresponding Copyright Holder. This restriction only applies to the
+primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created using
+the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

bookwyrm/static/fonts/source_han_sans/README.txt

@@ -0,0 +1,9 @@
+The font file itself is not included in the Git repository to avoid putting
+large files in the repo history. The Docker image should download the correct
+font into this folder automatically.
+
+In case something goes wrong, the font used is the Variable OTC TTF, available
+as of this writing from the Adobe Fonts GitHub repository:
+https://github.com/adobe-fonts/source-han-sans/tree/release#user-content-variable-otcs
+
+BookWyrm expects the file to be in this folder, named SourceHanSans-VF.ttf.ttc

requirements.txt

@@ -6,7 +6,7 @@ django-model-utils==4.0.0
 environs==9.3.4
 flower==1.0.0
 Markdown==3.3.3
-Pillow>=8.2.0
+Pillow>=9.0.0
 psycopg2==2.8.4
 pycryptodome==3.9.4
 python-dateutil==2.8.1