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7f29687a55
git-svn-id: http://core.svn.wordpress.org/branches/4.3@33847 1a063a9b-81f0-0310-95a4-ce76da25c4cd
602 lines
19 KiB
PHP
602 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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* @global array $_wp_additional_image_sizes
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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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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 );
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}
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/**
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* Load an image resource for editing.
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*
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* @since 2.9.0
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*
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* @param string $attachment_id Attachment ID.
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* @param string $mime_type Image mime type.
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* @param string $size Optional. Image size, defaults to 'full'.
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* @return resource|false The resulting image resource on success, false on failure.
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*/
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function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
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$filepath = _load_image_to_edit_path( $attachment_id, $size );
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if ( empty( $filepath ) )
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return false;
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switch ( $mime_type ) {
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case 'image/jpeg':
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$image = imagecreatefromjpeg($filepath);
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break;
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case 'image/png':
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$image = imagecreatefrompng($filepath);
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break;
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case 'image/gif':
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$image = imagecreatefromgif($filepath);
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break;
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default:
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$image = false;
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break;
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}
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if ( is_resource($image) ) {
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/**
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* Filter the current image being loaded for editing.
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*
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* @since 2.9.0
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*
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* @param resource $image Current image.
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* @param string $attachment_id Attachment ID.
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* @param string $size Image size.
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*/
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$image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size );
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if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
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imagealphablending($image, false);
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imagesavealpha($image, true);
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}
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}
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return $image;
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}
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/**
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* Retrieve the path or url of an attachment's attached file.
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*
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* If the attached file is not present on the local filesystem (usually due to replication plugins),
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* then the url of the file is returned if url fopen is supported.
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*
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* @since 3.4.0
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* @access private
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*
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* @param string $attachment_id Attachment ID.
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* @param string $size Optional. Image size, defaults to 'full'.
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* @return string|false File path or url on success, false on failure.
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*/
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function _load_image_to_edit_path( $attachment_id, $size = 'full' ) {
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$filepath = get_attached_file( $attachment_id );
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if ( $filepath && file_exists( $filepath ) ) {
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if ( 'full' != $size && ( $data = image_get_intermediate_size( $attachment_id, $size ) ) ) {
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/**
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* Filter the path to the current image.
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*
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* The filter is evaluated for all image sizes except 'full'.
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*
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* @since 3.1.0
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*
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* @param string $path Path to the current image.
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* @param string $attachment_id Attachment ID.
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* @param string $size Size of the image.
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*/
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$filepath = apply_filters( 'load_image_to_edit_filesystempath', path_join( dirname( $filepath ), $data['file'] ), $attachment_id, $size );
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}
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} elseif ( function_exists( 'fopen' ) && function_exists( 'ini_get' ) && true == ini_get( 'allow_url_fopen' ) ) {
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/**
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* Filter the image URL if not in the local filesystem.
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*
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* The filter is only evaluated if fopen is enabled on the server.
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*
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* @since 3.1.0
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*
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* @param string $image_url Current image URL.
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* @param string $attachment_id Attachment ID.
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* @param string $size Size of the image.
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*/
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$filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size );
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}
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/**
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* Filter the returned path or URL of the current image.
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*
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|
* @since 2.9.0
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|
*
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* @param string|bool $filepath File path or URL to current image, or false.
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|
* @param string $attachment_id Attachment ID.
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* @param string $size Size of the image.
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*/
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return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size );
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}
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/**
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|
* Copy an existing image file.
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*
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|
* @since 3.4.0
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|
* @access private
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|
*
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|
* @param string $attachment_id Attachment ID.
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* @return string|false New file path on success, false on failure.
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|
*/
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|
function _copy_image_file( $attachment_id ) {
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$dst_file = $src_file = get_attached_file( $attachment_id );
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if ( ! file_exists( $src_file ) )
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$src_file = _load_image_to_edit_path( $attachment_id );
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if ( $src_file ) {
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$dst_file = str_replace( basename( $dst_file ), 'copy-' . basename( $dst_file ), $dst_file );
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$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
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/*
|
|
* The directory containing the original file may no longer
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|
* exist when using a replication plugin.
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|
*/
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|
wp_mkdir_p( dirname( $dst_file ) );
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|
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|
if ( ! @copy( $src_file, $dst_file ) )
|
|
$dst_file = false;
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} else {
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|
$dst_file = false;
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|
}
|
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return $dst_file;
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|
}
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