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feat: add progressive rendering option for static jpeg images (#1397)

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Samuel 2024-10-10 14:56:56 +01:00 committed by GitHub
parent 6f28feb947
commit 760653901e
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2 changed files with 6 additions and 2 deletions
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3
docs/config.rst
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@ -94,7 +94,8 @@ Use ``false`` to disable the front page altogether (404).
-----------------
You can use this to specify options for the generation of images in the supported file formats.
For JPEG and WebP, the only supported option is ``quality`` [0-100].
For WebP, the only supported option is ``quality`` [0-100].
For JPEG, the only supported options are ``quality`` [0-100] and ``progressive`` [true, false].
For PNG, the full set of options `exposed by the sharp library <https://sharp.pixelplumbing.com/api-output#png>`_ is available, except ``force`` and ``colours`` (use ``colors``). If not set, their values are the defaults from ``sharp``.
For example::

5
src/serve_rendered.js
View file

@ -527,7 +527,10 @@ const respondImage = (
dither: formatOptions.dither,
});
} else if (format === 'jpeg') {
image.jpeg({ quality: formatOptions.quality || formatQuality || 80 });
image.jpeg({
quality: formatOptions.quality || formatQuality || 80,
progressive: formatOptions.progressive,
});
} else if (format === 'webp') {
image.webp({ quality: formatOptions.quality || formatQuality || 90 });
}