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Media: Make PDF preview sizes filterable.

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This adds a new filter, `fallback_intermediate_image_sizes`, which
can be used to modify the array of image sizes created for previewing
PDFs in the media library and checks for the existence of sizes before
processing any image representations of a PDF.

Fixes #38594.

git-svn-id: https://develop.svn.wordpress.org/trunk@39246 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Joe McGill
2016-11-15 13:25:46 +00:00
parent 9ae30a3725
commit f922c64efa
1 changed files with 27 additions and 15 deletions
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42
src/wp-admin/includes/image.php
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@@ -205,38 +205,50 @@ function wp_generate_attachment_metadata( $attachment_id, $file ) {
}
// Try to create image thumbnails for PDFs
else if ( 'application/pdf' === $mime_type ) {
$editor = wp_get_image_editor( $file );
$fallback_sizes = array(
'thumbnail',
'medium',
'large',
);
/**
* Filters the image sizes generated for non-image mime types.
*
* @since 4.7.0
*
* @param array $fallback_sizes An array of image size names.
*/
$fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata );
$sizes = array();
foreach ( $fallback_sizes as $s ) {
$sizes[$s]['width'] = get_option( "{$s}_size_w" );
$sizes[$s]['height'] = get_option( "{$s}_size_h" );
$sizes[ $s ]['width'] = get_option( "{$s}_size_w" );
$sizes[ $s ]['height'] = get_option( "{$s}_size_h" );
// Force thumbnails to be soft crops.
if ( ! 'thumbnail' === $s ) {
$sizes[$s]['crop'] = get_option( "{$s}_crop" );
$sizes[ $s ]['crop'] = get_option( "{$s}_crop" );
}
}
if ( ! is_wp_error( $editor ) ) { // No support for this type of file
$uploaded = $editor->save( $file, 'image/jpeg' );
unset( $editor );
// Only load PDFs in an image editor if we're processing sizes.
if ( ! empty( $sizes ) ) {
$editor = wp_get_image_editor( $file );
// Resize based on the full size image, rather than the source.
if ( ! is_wp_error( $uploaded ) ) {
$editor = wp_get_image_editor( $uploaded['path'] );
unset( $uploaded['path'] );
if ( ! is_wp_error( $editor ) ) { // No support for this type of file
$uploaded = $editor->save( $file, 'image/jpeg' );
unset( $editor );
if ( ! is_wp_error( $editor ) ) {
$metadata['sizes'] = $editor->multi_resize( $sizes );
$metadata['sizes']['full'] = $uploaded;
// Resize based on the full size image, rather than the source.
if ( ! is_wp_error( $uploaded ) ) {
$editor = wp_get_image_editor( $uploaded['path'] );
unset( $uploaded['path'] );
if ( ! is_wp_error( $editor ) ) {
$metadata['sizes'] = $editor->multi_resize( $sizes );
$metadata['sizes']['full'] = $uploaded;
}
}
}
}