Ticket #48736: 48736.diff

src/wp-admin/includes/image.php

@@ -244 +244 @@
                 $image_meta['image_meta'] = $exif_meta;
         }
 
-        /**
-         * Filters the "BIG image" threshold value.
-         *
-         * If the original image width or height is above the threshold, it will be scaled down. The threshold is
-         * used as max width and max height. The scaled down image will be used as the largest available size, including
-         * the `_wp_attached_file` post meta value.
-         *
-         * Returning `false` from the filter callback will disable the scaling.
-         *
-         * @since 5.3.0
-         *
-         * @param int    $threshold     The threshold value in pixels. Default 2560.
-         * @param array  $imagesize     {
-         *     Indexed array of the image width and height in pixels.
-         *
-         *     @type int $0 The image width.
-         *     @type int $1 The image height.
-         * }
-         * @param string $file          Full path to the uploaded image file.
-         * @param int    $attachment_id Attachment post ID.
-         */
-        $threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id );
+        // Do not scale (large) PNG images. May result in sub-sizes that have greater file size than the original. See #48736.
+        if ( $imagesize['mime'] !== 'image/png' ) {
 
-        // If the original image's dimensions are over the threshold, scale the image
-        // and use it as the "full" size.
-        if ( $threshold && ( $image_meta['width'] > $threshold || $image_meta['height'] > $threshold ) ) {
-                $editor = wp_get_image_editor( $file );
+                /**
+                 * Filters the "BIG image" threshold value.
+                 *
+                 * If the original image width or height is above the threshold, it will be scaled down. The threshold is
+                 * used as max width and max height. The scaled down image will be used as the largest available size, including
+                 * the `_wp_attached_file` post meta value.
+                 *
+                 * Returning `false` from the filter callback will disable the scaling.
+                 *
+                 * @since 5.3.0
+                 *
+                 * @param int    $threshold     The threshold value in pixels. Default 2560.
+                 * @param array  $imagesize     {
+                 *     Indexed array of the image width and height in pixels.
+                 *
+                 *     @type int $0 The image width.
+                 *     @type int $1 The image height.
+                 * }
+                 * @param string $file          Full path to the uploaded image file.
+                 * @param int    $attachment_id Attachment post ID.
+                 */
+                $threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id );
 
-                if ( is_wp_error( $editor ) ) {
-                        // This image cannot be edited.
-                        return $image_meta;
-                }
+                // If the original image's dimensions are over the threshold, scale the image
+                // and use it as the "full" size.
+                if ( $threshold && ( $image_meta['width'] > $threshold || $image_meta['height'] > $threshold ) ) {
+                        $editor = wp_get_image_editor( $file );
 
-                // Resize the image
-                $resized = $editor->resize( $threshold, $threshold );
-                $rotated = null;
+                        if ( is_wp_error( $editor ) ) {
+                                // This image cannot be edited.
+                                return $image_meta;
+                        }
 
-                // If there is EXIF data, rotate according to EXIF Orientation.
-                if ( ! is_wp_error( $resized ) && is_array( $exif_meta ) ) {
-                        $resized = $editor->maybe_exif_rotate();
-                        $rotated = $resized;
-                }
+                        // Resize the image
+                        $resized = $editor->resize( $threshold, $threshold );
+                        $rotated = null;
 
-                if ( ! is_wp_error( $resized ) ) {
-                        // Append "-scaled" to the image file name. It will look like "my_image-scaled.jpg".
-                        // This doesn't affect the sub-sizes names as they are generated from the original image (for best quality).
-                        $saved = $editor->save( $editor->generate_filename( 'scaled' ) );
+                        // If there is EXIF data, rotate according to EXIF Orientation.
+                        if ( ! is_wp_error( $resized ) && is_array( $exif_meta ) ) {
+                                $resized = $editor->maybe_exif_rotate();
+                                $rotated = $resized;
+                        }
 
-                        if ( ! is_wp_error( $saved ) ) {
-                                $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
+                        if ( ! is_wp_error( $resized ) ) {
+                                // Append "-scaled" to the image file name. It will look like "my_image-scaled.jpg".
+                                // This doesn't affect the sub-sizes names as they are generated from the original image (for best quality).
+                                $saved = $editor->save( $editor->generate_filename( 'scaled' ) );
 
-                                // If the image was rotated update the stored EXIF data.
-                                if ( true === $rotated && ! empty( $image_meta['image_meta']['orientation'] ) ) {
-                                        $image_meta['image_meta']['orientation'] = 1;
+                                if ( ! is_wp_error( $saved ) ) {
+                                        $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
+
+                                        // If the image was rotated update the stored EXIF data.
+                                        if ( true === $rotated && ! empty( $image_meta['image_meta']['orientation'] ) ) {
+                                                $image_meta['image_meta']['orientation'] = 1;
+                                        }
+                                } else {
+                                        // TODO: log errors.
                                 }
                         } else {
                                 // TODO: log errors.
                         }
-                } else {
-                        // TODO: log errors.
-                }
-        } elseif ( ! empty( $exif_meta['orientation'] ) && (int) $exif_meta['orientation'] !== 1 ) {
-                // Rotate the whole original image if there is EXIF data and "orientation" is not 1.
+                } elseif ( ! empty( $exif_meta['orientation'] ) && (int) $exif_meta['orientation'] !== 1 ) {
+                        // Rotate the whole original image if there is EXIF data and "orientation" is not 1.
 
-                $editor = wp_get_image_editor( $file );
+                        $editor = wp_get_image_editor( $file );
 
-                if ( is_wp_error( $editor ) ) {
-                        // This image cannot be edited.
-                        return $image_meta;
-                }
+                        if ( is_wp_error( $editor ) ) {
+                                // This image cannot be edited.
+                                return $image_meta;
+                        }
 
-                // Rotate the image
-                $rotated = $editor->maybe_exif_rotate();
+                        // Rotate the image
+                        $rotated = $editor->maybe_exif_rotate();
 
-                if ( true === $rotated ) {
-                        // Append `-rotated` to the image file name.
-                        $saved = $editor->save( $editor->generate_filename( 'rotated' ) );
+                        if ( true === $rotated ) {
+                                // Append `-rotated` to the image file name.
+                                $saved = $editor->save( $editor->generate_filename( 'rotated' ) );
 
-                        if ( ! is_wp_error( $saved ) ) {
-                                $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
+                                if ( ! is_wp_error( $saved ) ) {
+                                        $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );
 
-                                // Update the stored EXIF data.
-                                if ( ! empty( $image_meta['image_meta']['orientation'] ) ) {
-                                        $image_meta['image_meta']['orientation'] = 1;
+                                        // Update the stored EXIF data.
+                                        if ( ! empty( $image_meta['image_meta']['orientation'] ) ) {
+                                                $image_meta['image_meta']['orientation'] = 1;
+                                        }
+                                } else {
+                                        // TODO: log errors.
                                 }
-                        } else {
-                                // TODO: log errors.
                         }
                 }
         }