When `$size` is passed to `image_get_intermediate_size()` as an array of width
and height values and an exact image size matching those values isn't available,
the function loops through the available attachment sizes and returns the
smallest image larger than the requested dimensions with the same aspect ratio.
The aspect ratio check is skipped for the 'thumbnail' size to provide a fallback
for small sizes when no other image option is available. This resulted in a poor
selection when the size requested was smaller than the 'thumbnail' dimensions
but a larger size matching the requested ratio existed.
This refactors the internals of `image_get_intermediate_size()` to ensure the
'thumbnail' size is only returned as a fallback to small sizes once all other
options have been considered, and makes the control flow easier to follow.
This also introduces a new helper function, `wp_image_matches_ratio()` for
testing whether the aspect ratios of two sets of dimensions match. This function
is also now used in `wp_calculate_image_srcset()` during the selection process.
Props flixos, joemcgill.
Fixes#34384, #34980.
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In some cases, images in the media library may contain spaces in
their filenames. This results in an invalid `srcset` attribute,
causing broken images on the front end. This change fixes the issue
by replacing spaces in URLs with URL encoded '%20' characters before
returning the `srcset` string.
Props underdude, joemcgill.
Fixes#36549.
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`wp_convert_hr_to_bytes()` was previously defined in wp-includes/media.php because it's only used by `wp_max_upload_size()` in the same file.
Moving this function to load.php allows us to improve core's memory limit handling.
See #32075.
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In `wp_calculate_image_srcset()` we get an array of image sizes
associated with an attachment and then add the original image's
information to the array before processing the `srcset`. In doing
so, we set the original data to a `$image_sizes['full']` key, which
could stomp on any custom image sizes using `full` as a size name.
This avoid the issues by adding the original data without a named
key, which is never referenced anyway.
Props jaspermdegroot.
Fixes#36345.
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The media library can contain files which aren't attached yet. When attaching a file you currently get "Media attachment reattached.", or the opposite "Media attachment detached.". That's redundant and can be inaccurate. It's also not easy to translate in some languages.
This change generalizes the strings to refer to a "media file" instead.
Props SergeyBiryukov, ocean90, netweb.
Fixes#36089.
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We rely on the `wp-image-` class to quickly find an attachment ID to add responsive image attributes.
To avoid incorrect images being displayed, do not add these attributes if the `src` does not match the
meta from the attachment ID in the class.
Props azaozz, kovshenin, joemcgill.
Fixes: #34898.
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- Fix `_wp_upload_dir_baseurl()` to cache by blog_id.
- Replace `path_join()` with `trailingslashit()`, it's much faster.
- Rename $image_url to $image_src for consistency (used at about 50 other places).
- Couple of tests fixes.
See #34430.
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- More fixes to inline docs.
- Replace the last `wp_get_attachment_metadata()` with `get_post_meta()`.
- For consistency only accept array or named size in `wp_get_attachment_image_sizes()`.
Props jaspermdegroot.
See #34430.
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- Check if wp_get_attachment_metadata() has returned an array to prevent errors when using SVGs.
- Only add the srcset attribute if there will be a sizes attribute.
- Better filter names.
- Some more inline docs fixes.
Props jaspermdegroot.
See #34430.
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- Introduce `wp_calculate_image_srcset()` that replaces `wp_get_attachment_image_srcset_array()` and is used as lower level function for retrieving the srcset data as array.
- Use the new function when generating `srcset` and `sizes` on the front-end. This is faster as no (other) image API functions are used.
- Change the `wp_get_attachment_image_srcset()`. Now it is meant for use in templates and is no longer used in core.
- A few logic fixes and improvements.
- Some names changed to be (hopefully) more descriptive.
- Fixed/updated tests.
Props joemcgill, jaspermdegroot, azaozz.
See #34430.
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Joe McGill
Dominik Schilling
Sergey Biryukov
Helen Hou-Sandí
Drew Jaynes
Ella Iseulde Van Dorpe
Andrew Ozz
John Blackbourn
Rachel Baker
Pascal Birchler
Mike Schroder
Scott Taylor