Viewing file: 
image.php (15.23 KB) -rw-r--r--Select action/file-type:
(
+) |
(
+) |
(
+) |
Code (
+) |
Session (
+) |
(
+) |
SDB (
+) |
(
+) |
(
+) |
(
+) |
(
+) |
(
+) |
<?php
/**
* File contains all the administration image manipulation functions.
*
* @package WordPress
* @subpackage Administration
*/
/**
* Crop an Image to a given size.
*
* @since 2.1.0
*
* @param string|int $src The source file or Attachment ID.
* @param int $src_x The start x position to crop from.
* @param int $src_y The start y position to crop from.
* @param int $src_w The width to crop.
* @param int $src_h The height to crop.
* @param int $dst_w The destination width.
* @param int $dst_h The destination height.
* @param int $src_abs Optional. If the source crop points are absolute.
* @param string $dst_file Optional. The destination file to write to.
* @return string|WP_Error New filepath on success, WP_Error on failure.
*/
function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
$src_file = $src;
if ( is_numeric( $src ) ) { // Handle int as attachment ID
$src_file = get_attached_file( $src );
if ( ! file_exists( $src_file ) ) {
// If the file doesn't exist, attempt a url fopen on the src link.
// This can occur with certain file replication plugins.
$src = _load_image_to_edit_path( $src, 'full' );
} else {
$src = $src_file;
}
}
$editor = wp_get_image_editor( $src );
if ( is_wp_error( $editor ) )
return $editor;
$src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs );
if ( is_wp_error( $src ) )
return $src;
if ( ! $dst_file )
$dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );
// The directory containing the original file may no longer exist when
// using a replication plugin.
wp_mkdir_p( dirname( $dst_file ) );
$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
$result = $editor->save( $dst_file );
if ( is_wp_error( $result ) )
return $result;
return $dst_file;
}
/**
* Generate post thumbnail attachment meta data.
*
* @since 2.1.0
*
* @param int $attachment_id Attachment Id to process.
* @param string $file Filepath of the Attached image.
* @return mixed Metadata for attachment.
*/
function wp_generate_attachment_metadata( $attachment_id, $file ) {
$attachment = get_post( $attachment_id );
$metadata = array();
$support = false;
if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
$imagesize = getimagesize( $file );
$metadata['width'] = $imagesize[0];
$metadata['height'] = $imagesize[1];
// Make the file path relative to the upload dir
$metadata['file'] = _wp_relative_upload_path($file);
// make thumbnails and other intermediate sizes
global $_wp_additional_image_sizes;
$sizes = array();
foreach ( get_intermediate_image_sizes() as $s ) {
$sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => false );
if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
$sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
else
$sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
$sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
else
$sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
$sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] ); // For theme-added sizes
else
$sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
}
$sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );
if ( $sizes ) {
$editor = wp_get_image_editor( $file );
if ( ! is_wp_error( $editor ) )
$metadata['sizes'] = $editor->multi_resize( $sizes );
} else {
$metadata['sizes'] = array();
}
// fetch additional metadata from exif/iptc
$image_meta = wp_read_image_metadata( $file );
if ( $image_meta )
$metadata['image_meta'] = $image_meta;
} elseif ( preg_match( '#^video/#', get_post_mime_type( $attachment ) ) ) {
$metadata = wp_read_video_metadata( $file );
$support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) && post_type_supports( 'attachment:video', 'thumbnail' );
} elseif ( preg_match( '#^audio/#', get_post_mime_type( $attachment ) ) ) {
$metadata = wp_read_audio_metadata( $file );
$support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) && post_type_supports( 'attachment:audio', 'thumbnail' );
}
if ( $support && ! empty( $metadata['image']['data'] ) ) {
$ext = '.jpg';
switch ( $metadata['image']['mime'] ) {
case 'image/gif':
$ext = '.gif';
break;
case 'image/png':
$ext = '.png';
break;
}
$basename = str_replace( '.', '-', basename( $file ) ) . '-image' . $ext;
$uploaded = wp_upload_bits( $basename, '', $metadata['image']['data'] );
if ( false === $uploaded['error'] ) {
$attachment = array(
'post_mime_type' => $metadata['image']['mime'],
'post_type' => 'attachment',
'post_content' => '',
);
$sub_attachment_id = wp_insert_attachment( $attachment, $uploaded['file'] );
$attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );
wp_update_attachment_metadata( $sub_attachment_id, $attach_data );
update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );
}
}
// remove the blob of binary data from the array
if ( isset( $metadata['image']['data'] ) )
unset( $metadata['image']['data'] );
return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
}
/**
* Convert a fraction string to a decimal.
*
* @since 2.5.0
*
* @param string $str
* @return int|float
*/
function wp_exif_frac2dec($str) {
@list( $n, $d ) = explode( '/', $str );
if ( !empty($d) )
return $n / $d;
return $str;
}
/**
* Convert the exif date format to a unix timestamp.
*
* @since 2.5.0
*
* @param string $str
* @return int
*/
function wp_exif_date2ts($str) {
@list( $date, $time ) = explode( ' ', trim($str) );
@list( $y, $m, $d ) = explode( ':', $date );
return strtotime( "{$y}-{$m}-{$d} {$time}" );
}
/**
* Get extended image metadata, exif or iptc as available.
*
* Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso
* created_timestamp, focal_length, shutter_speed, and title.
*
* The IPTC metadata that is retrieved is APP13, credit, byline, created date
* and time, caption, copyright, and title. Also includes FNumber, Model,
* DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.
*
* @todo Try other exif libraries if available.
* @since 2.5.0
*
* @param string $file
* @return bool|array False on failure. Image metadata array on success.
*/
function wp_read_image_metadata( $file ) {
if ( ! file_exists( $file ) )
return false;
list( , , $sourceImageType ) = getimagesize( $file );
// exif contains a bunch of data we'll probably never need formatted in ways
// that are difficult to use. We'll normalize it and just extract the fields
// that are likely to be useful. Fractions and numbers are converted to
// floats, dates to unix timestamps, and everything else to strings.
$meta = array(
'aperture' => 0,
'credit' => '',
'camera' => '',
'caption' => '',
'created_timestamp' => 0,
'copyright' => '',
'focal_length' => 0,
'iso' => 0,
'shutter_speed' => 0,
'title' => '',
);
// read iptc first, since it might contain data not available in exif such
// as caption, description etc
if ( is_callable( 'iptcparse' ) ) {
getimagesize( $file, $info );
if ( ! empty( $info['APP13'] ) ) {
$iptc = iptcparse( $info['APP13'] );
// headline, "A brief synopsis of the caption."
if ( ! empty( $iptc['2#105'][0] ) )
$meta['title'] = trim( $iptc['2#105'][0] );
// title, "Many use the Title field to store the filename of the image, though the field may be used in many ways."
elseif ( ! empty( $iptc['2#005'][0] ) )
$meta['title'] = trim( $iptc['2#005'][0] );
if ( ! empty( $iptc['2#120'][0] ) ) { // description / legacy caption
$caption = trim( $iptc['2#120'][0] );
if ( empty( $meta['title'] ) ) {
// Assume the title is stored in 2:120 if it's short.
if ( strlen( $caption ) < 80 )
$meta['title'] = $caption;
else
$meta['caption'] = $caption;
} elseif ( $caption != $meta['title'] ) {
$meta['caption'] = $caption;
}
}
if ( ! empty( $iptc['2#110'][0] ) ) // credit
$meta['credit'] = trim( $iptc['2#110'][0] );
elseif ( ! empty( $iptc['2#080'][0] ) ) // creator / legacy byline
$meta['credit'] = trim( $iptc['2#080'][0] );
if ( ! empty( $iptc['2#055'][0] ) and ! empty( $iptc['2#060'][0] ) ) // created date and time
$meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] );
if ( ! empty( $iptc['2#116'][0] ) ) // copyright
$meta['copyright'] = trim( $iptc['2#116'][0] );
}
}
// fetch additional info from exif if available
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 ) ) ) ) {
$exif = @exif_read_data( $file );
if ( !empty( $exif['Title'] ) )
$meta['title'] = trim( $exif['Title'] );
if ( ! empty( $exif['ImageDescription'] ) ) {
if ( empty( $meta['title'] ) && strlen( $exif['ImageDescription'] ) < 80 ) {
// Assume the title is stored in ImageDescription
$meta['title'] = trim( $exif['ImageDescription'] );
if ( ! empty( $exif['COMPUTED']['UserComment'] ) && trim( $exif['COMPUTED']['UserComment'] ) != $meta['title'] )
$meta['caption'] = trim( $exif['COMPUTED']['UserComment'] );
} elseif ( trim( $exif['ImageDescription'] ) != $meta['title'] ) {
$meta['caption'] = trim( $exif['ImageDescription'] );
}
} elseif ( ! empty( $exif['Comments'] ) && trim( $exif['Comments'] ) != $meta['title'] ) {
$meta['caption'] = trim( $exif['Comments'] );
}
if ( ! empty( $exif['Artist'] ) )
$meta['credit'] = trim( $exif['Artist'] );
elseif ( ! empty($exif['Author'] ) )
$meta['credit'] = trim( $exif['Author'] );
if ( ! empty( $exif['Copyright'] ) )
$meta['copyright'] = trim( $exif['Copyright'] );
if ( ! empty($exif['FNumber'] ) )
$meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
if ( ! empty($exif['Model'] ) )
$meta['camera'] = trim( $exif['Model'] );
if ( ! empty($exif['DateTimeDigitized'] ) )
$meta['created_timestamp'] = wp_exif_date2ts($exif['DateTimeDigitized'] );
if ( ! empty($exif['FocalLength'] ) )
$meta['focal_length'] = (string) wp_exif_frac2dec( $exif['FocalLength'] );
if ( ! empty($exif['ISOSpeedRatings'] ) ) {
$meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? reset( $exif['ISOSpeedRatings'] ) : $exif['ISOSpeedRatings'];
$meta['iso'] = trim( $meta['iso'] );
}
if ( ! empty($exif['ExposureTime'] ) )
$meta['shutter_speed'] = (string) wp_exif_frac2dec( $exif['ExposureTime'] );
}
foreach ( array( 'title', 'caption', 'credit', 'copyright', 'camera', 'iso' ) as $key ) {
if ( $meta[ $key ] && ! seems_utf8( $meta[ $key ] ) )
$meta[ $key ] = utf8_encode( $meta[ $key ] );
}
return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType );
}
/**
* Validate that file is an image.
*
* @since 2.5.0
*
* @param string $path File path to test if valid image.
* @return bool True if valid image, false if not valid image.
*/
function file_is_valid_image($path) {
$size = @getimagesize($path);
return !empty($size);
}
/**
* Validate that file is suitable for displaying within a web page.
*
* @since 2.5.0
* @uses apply_filters() Calls 'file_is_displayable_image' on $result and $path.
*
* @param string $path File path to test.
* @return bool True if suitable, false if not suitable.
*/
function file_is_displayable_image($path) {
$info = @getimagesize($path);
if ( empty($info) )
$result = false;
elseif ( !in_array($info[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG)) ) // only gif, jpeg and png images can reliably be displayed
$result = false;
else
$result = true;
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) ) {
$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 ) ) ) {
$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' ) ) {
$filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size );
}
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;
}
