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19f1d4f402
Make sure the caption is always set if found. Previously, if the caption was less than 80 characters, only the Title field would be set. props beaulebens, ericlewis, bendoh, SergeyBiryukov. fixes #22768. Built from https://develop.svn.wordpress.org/trunk@31694 git-svn-id: http://core.svn.wordpress.org/trunk@31675 1a063a9b-81f0-0310-95a4-ce76da25c4cd
601 lines
19 KiB
PHP
601 lines
19 KiB
PHP
<?php
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/**
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* File contains all the administration image manipulation functions.
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*
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* @package WordPress
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* @subpackage Administration
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*/
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/**
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* Crop an Image to a given size.
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*
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* @since 2.1.0
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*
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* @param string|int $src The source file or Attachment ID.
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* @param int $src_x The start x position to crop from.
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* @param int $src_y The start y position to crop from.
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* @param int $src_w The width to crop.
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* @param int $src_h The height to crop.
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* @param int $dst_w The destination width.
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* @param int $dst_h The destination height.
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* @param int $src_abs Optional. If the source crop points are absolute.
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* @param string $dst_file Optional. The destination file to write to.
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* @return string|WP_Error New filepath on success, WP_Error on failure.
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*/
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function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
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$src_file = $src;
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if ( is_numeric( $src ) ) { // Handle int as attachment ID
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$src_file = get_attached_file( $src );
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if ( ! file_exists( $src_file ) ) {
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// If the file doesn't exist, attempt a url fopen on the src link.
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// This can occur with certain file replication plugins.
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$src = _load_image_to_edit_path( $src, 'full' );
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} else {
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$src = $src_file;
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}
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}
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$editor = wp_get_image_editor( $src );
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if ( is_wp_error( $editor ) )
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return $editor;
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$src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs );
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if ( is_wp_error( $src ) )
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return $src;
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if ( ! $dst_file )
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$dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );
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/*
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* The directory containing the original file may no longer exist when
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* using a replication plugin.
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*/
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wp_mkdir_p( dirname( $dst_file ) );
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$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
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$result = $editor->save( $dst_file );
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if ( is_wp_error( $result ) )
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return $result;
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return $dst_file;
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}
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/**
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* Generate post thumbnail attachment meta data.
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*
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* @since 2.1.0
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*
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* @param int $attachment_id Attachment Id to process.
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* @param string $file Filepath of the Attached image.
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* @return mixed Metadata for attachment.
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*/
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function wp_generate_attachment_metadata( $attachment_id, $file ) {
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$attachment = get_post( $attachment_id );
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$metadata = array();
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$support = false;
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if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
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$imagesize = getimagesize( $file );
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$metadata['width'] = $imagesize[0];
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$metadata['height'] = $imagesize[1];
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// Make the file path relative to the upload dir.
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$metadata['file'] = _wp_relative_upload_path($file);
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// Make thumbnails and other intermediate sizes.
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global $_wp_additional_image_sizes;
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$sizes = array();
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foreach ( get_intermediate_image_sizes() as $s ) {
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$sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => false );
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if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
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$sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
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else
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$sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
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if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
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$sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
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else
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$sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
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if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
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$sizes[$s]['crop'] = $_wp_additional_image_sizes[$s]['crop']; // For theme-added sizes
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else
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$sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
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}
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/**
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* Filter the image sizes automatically generated when uploading an image.
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*
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* @since 2.9.0
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*
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* @param array $sizes An associative array of image sizes.
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*/
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$sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );
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if ( $sizes ) {
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$editor = wp_get_image_editor( $file );
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if ( ! is_wp_error( $editor ) )
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$metadata['sizes'] = $editor->multi_resize( $sizes );
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} else {
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$metadata['sizes'] = array();
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}
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// Fetch additional metadata from EXIF/IPTC.
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$image_meta = wp_read_image_metadata( $file );
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if ( $image_meta )
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$metadata['image_meta'] = $image_meta;
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} elseif ( wp_attachment_is( 'video', $attachment ) ) {
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$metadata = wp_read_video_metadata( $file );
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$support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) || post_type_supports( 'attachment:video', 'thumbnail' );
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} elseif ( wp_attachment_is( 'audio', $attachment ) ) {
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$metadata = wp_read_audio_metadata( $file );
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$support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) || post_type_supports( 'attachment:audio', 'thumbnail' );
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}
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if ( $support && ! empty( $metadata['image']['data'] ) ) {
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// Check for existing cover.
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$hash = md5( $metadata['image']['data'] );
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$posts = get_posts( array(
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'fields' => 'ids',
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'post_type' => 'attachment',
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'post_mime_type' => $metadata['image']['mime'],
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'post_status' => 'inherit',
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'posts_per_page' => 1,
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'meta_key' => '_cover_hash',
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'meta_value' => $hash
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) );
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$exists = reset( $posts );
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if ( ! empty( $exists ) ) {
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update_post_meta( $attachment_id, '_thumbnail_id', $exists );
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} else {
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$ext = '.jpg';
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switch ( $metadata['image']['mime'] ) {
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case 'image/gif':
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$ext = '.gif';
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break;
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case 'image/png':
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$ext = '.png';
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break;
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}
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$basename = str_replace( '.', '-', basename( $file ) ) . '-image' . $ext;
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$uploaded = wp_upload_bits( $basename, '', $metadata['image']['data'] );
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if ( false === $uploaded['error'] ) {
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$image_attachment = array(
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'post_mime_type' => $metadata['image']['mime'],
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'post_type' => 'attachment',
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'post_content' => '',
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);
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/**
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* Filter the parameters for the attachment thumbnail creation.
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*
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* @since 3.9.0
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*
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* @param array $image_attachment An array of parameters to create the thumbnail.
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* @param array $metadata Current attachment metadata.
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* @param array $uploaded An array containing the thumbnail path and url.
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*/
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$image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded );
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$sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] );
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add_post_meta( $sub_attachment_id, '_cover_hash', $hash );
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$attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );
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wp_update_attachment_metadata( $sub_attachment_id, $attach_data );
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update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );
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}
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}
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}
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// Remove the blob of binary data from the array.
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if ( isset( $metadata['image']['data'] ) )
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unset( $metadata['image']['data'] );
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/**
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* Filter the generated attachment meta data.
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*
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* @since 2.1.0
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*
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* @param array $metadata An array of attachment meta data.
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* @param int $attachment_id Current attachment ID.
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*/
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return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
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}
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/**
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* Convert a fraction string to a decimal.
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*
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* @since 2.5.0
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*
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* @param string $str
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* @return int|float
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*/
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function wp_exif_frac2dec($str) {
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@list( $n, $d ) = explode( '/', $str );
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if ( !empty($d) )
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return $n / $d;
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return $str;
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}
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/**
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* Convert the exif date format to a unix timestamp.
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*
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* @since 2.5.0
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*
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* @param string $str
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* @return int
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*/
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function wp_exif_date2ts($str) {
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@list( $date, $time ) = explode( ' ', trim($str) );
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@list( $y, $m, $d ) = explode( ':', $date );
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return strtotime( "{$y}-{$m}-{$d} {$time}" );
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}
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/**
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* Get extended image metadata, exif or iptc as available.
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*
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* Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso
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* created_timestamp, focal_length, shutter_speed, and title.
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*
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* The IPTC metadata that is retrieved is APP13, credit, byline, created date
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* and time, caption, copyright, and title. Also includes FNumber, Model,
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* DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.
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*
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* @todo Try other exif libraries if available.
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* @since 2.5.0
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*
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* @param string $file
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* @return bool|array False on failure. Image metadata array on success.
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*/
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function wp_read_image_metadata( $file ) {
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if ( ! file_exists( $file ) )
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return false;
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list( , , $sourceImageType ) = getimagesize( $file );
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/*
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* EXIF contains a bunch of data we'll probably never need formatted in ways
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* that are difficult to use. We'll normalize it and just extract the fields
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* that are likely to be useful. Fractions and numbers are converted to
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* floats, dates to unix timestamps, and everything else to strings.
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*/
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$meta = array(
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'aperture' => 0,
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'credit' => '',
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'camera' => '',
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'caption' => '',
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'created_timestamp' => 0,
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'copyright' => '',
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'focal_length' => 0,
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'iso' => 0,
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'shutter_speed' => 0,
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'title' => '',
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'orientation' => 0,
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);
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/*
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* Read IPTC first, since it might contain data not available in exif such
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* as caption, description etc.
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*/
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if ( is_callable( 'iptcparse' ) ) {
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getimagesize( $file, $info );
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if ( ! empty( $info['APP13'] ) ) {
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$iptc = iptcparse( $info['APP13'] );
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// Headline, "A brief synopsis of the caption."
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if ( ! empty( $iptc['2#105'][0] ) ) {
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$meta['title'] = trim( $iptc['2#105'][0] );
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/*
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* Title, "Many use the Title field to store the filename of the image,
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* though the field may be used in many ways."
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*/
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} elseif ( ! empty( $iptc['2#005'][0] ) ) {
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$meta['title'] = trim( $iptc['2#005'][0] );
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}
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if ( ! empty( $iptc['2#120'][0] ) ) { // description / legacy caption
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$caption = trim( $iptc['2#120'][0] );
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mbstring_binary_safe_encoding();
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$caption_length = strlen( $caption );
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reset_mbstring_encoding();
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if ( empty( $meta['title'] ) && $caption_length < 80 ) {
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// Assume the title is stored in 2:120 if it's short.
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$meta['title'] = $caption;
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}
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$meta['caption'] = $caption;
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}
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if ( ! empty( $iptc['2#110'][0] ) ) // credit
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$meta['credit'] = trim( $iptc['2#110'][0] );
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elseif ( ! empty( $iptc['2#080'][0] ) ) // creator / legacy byline
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$meta['credit'] = trim( $iptc['2#080'][0] );
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if ( ! empty( $iptc['2#055'][0] ) && ! empty( $iptc['2#060'][0] ) ) // created date and time
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$meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] );
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if ( ! empty( $iptc['2#116'][0] ) ) // copyright
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$meta['copyright'] = trim( $iptc['2#116'][0] );
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}
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}
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/**
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* Filter the image types to check for exif data.
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*
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* @since 2.5.0
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*
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* @param array $image_types Image types to check for exif data.
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*/
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if ( is_callable( 'exif_read_data' ) && in_array( $sourceImageType, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
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$exif = @exif_read_data( $file );
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if ( ! empty( $exif['ImageDescription'] ) ) {
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mbstring_binary_safe_encoding();
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$description_length = strlen( $exif['ImageDescription'] );
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reset_mbstring_encoding();
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if ( empty( $meta['title'] ) && $description_length < 80 ) {
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// Assume the title is stored in ImageDescription
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$meta['title'] = trim( $exif['ImageDescription'] );
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}
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if ( empty( $meta['caption'] ) && ! empty( $exif['COMPUTED']['UserComment'] ) ) {
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$meta['caption'] = trim( $exif['COMPUTED']['UserComment'] );
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}
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if ( empty( $meta['caption'] ) ) {
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$meta['caption'] = trim( $exif['ImageDescription'] );
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}
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} elseif ( empty( $meta['caption'] ) && ! empty( $exif['Comments'] ) ) {
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$meta['caption'] = trim( $exif['Comments'] );
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}
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if ( empty( $meta['credit'] ) ) {
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if ( ! empty( $exif['Artist'] ) ) {
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$meta['credit'] = trim( $exif['Artist'] );
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} elseif ( ! empty($exif['Author'] ) ) {
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$meta['credit'] = trim( $exif['Author'] );
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}
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}
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if ( empty( $meta['copyright'] ) && ! empty( $exif['Copyright'] ) ) {
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$meta['copyright'] = trim( $exif['Copyright'] );
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}
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if ( ! empty( $exif['FNumber'] ) ) {
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$meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
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}
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if ( ! empty( $exif['Model'] ) ) {
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$meta['camera'] = trim( $exif['Model'] );
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}
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if ( empty( $meta['created_timestamp'] ) && ! empty( $exif['DateTimeDigitized'] ) ) {
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$meta['created_timestamp'] = wp_exif_date2ts( $exif['DateTimeDigitized'] );
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}
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if ( ! empty( $exif['FocalLength'] ) ) {
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$meta['focal_length'] = (string) wp_exif_frac2dec( $exif['FocalLength'] );
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}
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if ( ! empty( $exif['ISOSpeedRatings'] ) ) {
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$meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? reset( $exif['ISOSpeedRatings'] ) : $exif['ISOSpeedRatings'];
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$meta['iso'] = trim( $meta['iso'] );
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}
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if ( ! empty( $exif['ExposureTime'] ) ) {
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$meta['shutter_speed'] = (string) wp_exif_frac2dec( $exif['ExposureTime'] );
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}
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if ( ! empty( $exif['Orientation'] ) ) {
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$meta['orientation'] = $exif['Orientation'];
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}
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}
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foreach ( array( 'title', 'caption', 'credit', 'copyright', 'camera', 'iso' ) as $key ) {
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if ( $meta[ $key ] && ! seems_utf8( $meta[ $key ] ) ) {
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$meta[ $key ] = utf8_encode( $meta[ $key ] );
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}
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}
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foreach ( $meta as &$value ) {
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if ( is_string( $value ) ) {
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$value = wp_kses_post( $value );
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}
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}
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/**
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* Filter the array of meta data read from an image's exif data.
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*
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* @since 2.5.0
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*
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* @param array $meta Image meta data.
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* @param string $file Path to image file.
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* @param int $sourceImageType Type of image.
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*/
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return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType );
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}
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/**
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* Validate that file is an image.
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*
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* @since 2.5.0
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*
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* @param string $path File path to test if valid image.
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* @return bool True if valid image, false if not valid image.
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*/
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function file_is_valid_image($path) {
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$size = @getimagesize($path);
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return !empty($size);
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}
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/**
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* Validate that file is suitable for displaying within a web page.
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*
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* @since 2.5.0
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*
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* @param string $path File path to test.
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* @return bool True if suitable, false if not suitable.
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*/
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function file_is_displayable_image($path) {
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$displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP );
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$info = @getimagesize( $path );
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if ( empty( $info ) ) {
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$result = false;
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} elseif ( ! in_array( $info[2], $displayable_image_types ) ) {
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$result = false;
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} else {
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$result = true;
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}
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/**
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* Filter whether the current image is displayable in the browser.
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*
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* @since 2.5.0
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*
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* @param bool $result Whether the image can be displayed. Default true.
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* @param string $path Path to the image.
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*/
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|
return apply_filters( 'file_is_displayable_image', $result, $path );
|
|
}
|
|
|
|
/**
|
|
* Load an image resource for editing.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $mime_type Image mime type.
|
|
* @param string $size Optional. Image size, defaults to 'full'.
|
|
* @return resource|false The resulting image resource on success, false on failure.
|
|
*/
|
|
function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
|
|
$filepath = _load_image_to_edit_path( $attachment_id, $size );
|
|
if ( empty( $filepath ) )
|
|
return false;
|
|
|
|
switch ( $mime_type ) {
|
|
case 'image/jpeg':
|
|
$image = imagecreatefromjpeg($filepath);
|
|
break;
|
|
case 'image/png':
|
|
$image = imagecreatefrompng($filepath);
|
|
break;
|
|
case 'image/gif':
|
|
$image = imagecreatefromgif($filepath);
|
|
break;
|
|
default:
|
|
$image = false;
|
|
break;
|
|
}
|
|
if ( is_resource($image) ) {
|
|
/**
|
|
* Filter the current image being loaded for editing.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param resource $image Current image.
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $size Image size.
|
|
*/
|
|
$image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size );
|
|
if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
|
|
imagealphablending($image, false);
|
|
imagesavealpha($image, true);
|
|
}
|
|
}
|
|
return $image;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the path or url of an attachment's attached file.
|
|
*
|
|
* If the attached file is not present on the local filesystem (usually due to replication plugins),
|
|
* then the url of the file is returned if url fopen is supported.
|
|
*
|
|
* @since 3.4.0
|
|
* @access private
|
|
*
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $size Optional. Image size, defaults to 'full'.
|
|
* @return string|false File path or url on success, false on failure.
|
|
*/
|
|
function _load_image_to_edit_path( $attachment_id, $size = 'full' ) {
|
|
$filepath = get_attached_file( $attachment_id );
|
|
|
|
if ( $filepath && file_exists( $filepath ) ) {
|
|
if ( 'full' != $size && ( $data = image_get_intermediate_size( $attachment_id, $size ) ) ) {
|
|
/**
|
|
* Filter the path to the current image.
|
|
*
|
|
* The filter is evaluated for all image sizes except 'full'.
|
|
*
|
|
* @since 3.1.0
|
|
*
|
|
* @param string $path Path to the current image.
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $size Size of the image.
|
|
*/
|
|
$filepath = apply_filters( 'load_image_to_edit_filesystempath', path_join( dirname( $filepath ), $data['file'] ), $attachment_id, $size );
|
|
}
|
|
} elseif ( function_exists( 'fopen' ) && function_exists( 'ini_get' ) && true == ini_get( 'allow_url_fopen' ) ) {
|
|
/**
|
|
* Filter the image URL if not in the local filesystem.
|
|
*
|
|
* The filter is only evaluated if fopen is enabled on the server.
|
|
*
|
|
* @since 3.1.0
|
|
*
|
|
* @param string $image_url Current image URL.
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $size Size of the image.
|
|
*/
|
|
$filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size );
|
|
}
|
|
|
|
/**
|
|
* Filter the returned path or URL of the current image.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string|bool $filepath File path or URL to current image, or false.
|
|
* @param string $attachment_id Attachment ID.
|
|
* @param string $size Size of the image.
|
|
*/
|
|
return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size );
|
|
}
|
|
|
|
/**
|
|
* Copy an existing image file.
|
|
*
|
|
* @since 3.4.0
|
|
* @access private
|
|
*
|
|
* @param string $attachment_id Attachment ID.
|
|
* @return string|false New file path on success, false on failure.
|
|
*/
|
|
function _copy_image_file( $attachment_id ) {
|
|
$dst_file = $src_file = get_attached_file( $attachment_id );
|
|
if ( ! file_exists( $src_file ) )
|
|
$src_file = _load_image_to_edit_path( $attachment_id );
|
|
|
|
if ( $src_file ) {
|
|
$dst_file = str_replace( basename( $dst_file ), 'copy-' . basename( $dst_file ), $dst_file );
|
|
$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
|
|
|
|
/*
|
|
* The directory containing the original file may no longer
|
|
* exist when using a replication plugin.
|
|
*/
|
|
wp_mkdir_p( dirname( $dst_file ) );
|
|
|
|
if ( ! @copy( $src_file, $dst_file ) )
|
|
$dst_file = false;
|
|
} else {
|
|
$dst_file = false;
|
|
}
|
|
|
|
return $dst_file;
|
|
}
|