diff -r 000000000000 -r d970ebf37754 wp/wp-admin/includes/image.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/includes/image.php	Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,450 @@
+<?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
+	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;
+}