Changeset 38949 for trunk/src/wp-admin/includes/image.php

Timestamp:

10/26/2016 07:27:51 AM (8 years ago)

Author:

mikeschroder

Message:

Media: Add support for rendering PDF thumbnails.

When support for PDFs is available, on upload,
render 'Thumbnail', 'Medium', 'Large', and 'Full' sizes of
the first page, and save them in attachment meta.

Use these renders within Add Media, Media Gallery and List views,
Attachment Details, Post/Attachment Edit screens, and Attachment pages.

Support available by default via Imagick -> ImageMagick -> Ghostscript,
but can be provided by any WP_Image_Editor that supports PDFs.

Props adamsilverstein, azaozz, celloexpressions, desrosj, dglingren, ericlewis, ipstenu, joemcgill, joyously, markoheijnen, melchoyce, mikeschroder, tomauger.
Fixes #31050.

File:

• trunk/src/wp-admin/includes/image.php (modified) (2 diffs)

trunk/src/wp-admin/includes/image.php

@@ -77 +77 @@
     $metadata = array();
     $support = false;
-    if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
+    $mime_type = get_post_mime_type( $attachment );
+
+    if ( preg_match( '!^image/!', $mime_type ) && file_is_displayable_image( $file ) ) {
         $imagesize = getimagesize( $file );
         $metadata['width'] = $imagesize[0];
@@ -202 +204 @@
         }
     }
+    // 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',
+        );
+
+        $sizes = array();
+
+        foreach ( $fallback_sizes as $s ) {
+            $sizes[$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" );
+            }
+        }
+
+        if ( ! is_wp_error( $editor ) ) { // No support for this type of file
+            $uploaded = $editor->save( $file, 'image/jpeg' );
+            unset( $editor );
+
+            // 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;
+                }
+            }
+        }
+    }
 
     // Remove the blob of binary data from the array.