mirror of
https://github.com/kemayo/leech
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482c1ab26e
Caused issues writing the file later, as the internal pointer moved past the first few bytes when checking whether it was a PNG. Fixes #19
92 lines
3 KiB
Python
92 lines
3 KiB
Python
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from PIL import Image, ImageDraw, ImageFont
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from io import BytesIO
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import textwrap
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import requests
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import logging
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logger = logging.getLogger(__name__)
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def make_cover(title, author, width=600, height=800, fontname="Helvetica", fontsize=40, bgcolor=(120, 20, 20), textcolor=(255, 255, 255), wrapat=30):
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img = Image.new("RGBA", (width, height), bgcolor)
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draw = ImageDraw.Draw(img)
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title = textwrap.fill(title, wrapat)
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author = textwrap.fill(author, wrapat)
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font = _safe_font(fontname, size=fontsize)
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title_size = draw.textsize(title, font=font)
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draw_text_outlined(draw, ((width - title_size[0]) / 2, 100), title, textcolor, font=font)
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# draw.text(((width - title_size[0]) / 2, 100), title, textcolor, font=font)
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font = _safe_font(fontname, size=fontsize - 2)
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author_size = draw.textsize(author, font=font)
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draw_text_outlined(draw, ((width - author_size[0]) / 2, 100 + title_size[1] + 70), author, textcolor, font=font)
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output = BytesIO()
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img.save(output, "PNG")
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output.name = 'cover.png'
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# writing left the cursor at the end of the file, so reset it
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output.seek(0)
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return output
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def make_cover_from_url(url, title, author):
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try:
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logger.info("Downloading cover from " + url)
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img = requests.Session().get(url)
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cover = BytesIO(img.content)
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imgformat = Image.open(cover).format
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# The `Image.open` read a few bytes from the stream to work out the
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# format, so reset it:
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cover.seek(0)
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if imgformat != "PNG":
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cover = _convert_to_png(cover)
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except Exception as e:
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logger.info("Encountered an error downloading cover: " + e)
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cover = make_cover(title, author)
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return cover
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def _convert_to_png(image_bytestream):
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png_image = BytesIO()
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Image.open(image_bytestream).save(png_image, format="PNG")
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png_image.name = 'cover.png'
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png_image.seek(0)
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return png_image
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def _safe_font(preferred, *args, **kwargs):
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for font in (preferred, "Helvetica", "FreeSans", "Arial"):
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try:
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return ImageFont.truetype(*args, font=font, **kwargs)
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except IOError:
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pass
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# This is pretty terrible, but it'll work regardless of what fonts the
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# system has. Worst issue: can't set the size.
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return ImageFont.load_default()
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def draw_text_outlined(draw, xy, text, fill=None, font=None, anchor=None):
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x, y = xy
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# Outline
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draw.text((x - 1, y), text=text, fill=(0, 0, 0), font=font, anchor=anchor)
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draw.text((x + 1, y), text=text, fill=(0, 0, 0), font=font, anchor=anchor)
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draw.text((x, y - 1), text=text, fill=(0, 0, 0), font=font, anchor=anchor)
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draw.text((x, y + 1), text=text, fill=(0, 0, 0), font=font, anchor=anchor)
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# Fill
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draw.text(xy, text=text, fill=fill, font=font, anchor=anchor)
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if __name__ == '__main__':
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f = make_cover('Test of a Title which is quite long and will require multiple lines', 'Some Dude')
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with open('output.png', 'wb') as out:
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out.write(f.read())
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