X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/3e7fab96d7874067884348df10bbdcdefa4a89ad..96bc8e88cf39086a9e0a883b8e2c311fe82a5e97:/wp-admin/includes/image.php

diff --git a/wp-admin/includes/image.php b/wp-admin/includes/image.php
index ec4466e5..98dd0ef5 100644
--- a/wp-admin/includes/image.php
+++ b/wp-admin/includes/image.php
@@ -1,118 +1,58 @@
 <?php
-
-function get_udims( $width, $height) {
-	if ( $height <= 96 && $width <= 128 )
-		return array( $width, $height);
-	elseif ( $width / $height > 4 / 3 )
-		return array( 128, (int) ($height / $width * 128 ));
-	else
-		return array( (int) ($width / $height * 96 ), 96 );
-}
-
-function wp_create_thumbnail( $file, $max_side, $effect = '' ) {
-
-		// 1 = GIF, 2 = JPEG, 3 = PNG
-
-	if ( file_exists( $file ) ) {
-		$type = getimagesize( $file );
-
-		// if the associated function doesn't exist - then it's not
-		// handle. duh. i hope.
-
-		if (!function_exists( 'imagegif' ) && $type[2] == 1 ) {
-			$error = __( 'Filetype not supported. Thumbnail not created.' );
-		}
-		elseif (!function_exists( 'imagejpeg' ) && $type[2] == 2 ) {
-			$error = __( 'Filetype not supported. Thumbnail not created.' );
-		}
-		elseif (!function_exists( 'imagepng' ) && $type[2] == 3 ) {
-			$error = __( 'Filetype not supported. Thumbnail not created.' );
-		} else {
-
-			// create the initial copy from the original file
-			if ( $type[2] == 1 ) {
-				$image = imagecreatefromgif( $file );
-			}
-			elseif ( $type[2] == 2 ) {
-				$image = imagecreatefromjpeg( $file );
-			}
-			elseif ( $type[2] == 3 ) {
-				$image = imagecreatefrompng( $file );
-			}
-
-			if ( function_exists( 'imageantialias' ))
-				imageantialias( $image, TRUE );
-
-			$image_attr = getimagesize( $file );
-
-			// figure out the longest side
-
-			if ( $image_attr[0] > $image_attr[1] ) {
-				$image_width = $image_attr[0];
-				$image_height = $image_attr[1];
-				$image_new_width = $max_side;
-
-				$image_ratio = $image_width / $image_new_width;
-				$image_new_height = $image_height / $image_ratio;
-				//width is > height
-			} else {
-				$image_width = $image_attr[0];
-				$image_height = $image_attr[1];
-				$image_new_height = $max_side;
-
-				$image_ratio = $image_height / $image_new_height;
-				$image_new_width = $image_width / $image_ratio;
-				//height > width
-			}
-
-			$thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height);
-			@ imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $image_attr[0], $image_attr[1] );
-
-			// If no filters change the filename, we'll do a default transformation.
-			if ( basename( $file ) == $thumb = apply_filters( 'thumbnail_filename', basename( $file ) ) )
-				$thumb = preg_replace( '!(\.[^.]+)?$!', '.thumbnail' . '$1', basename( $file ), 1 );
-
-			$thumbpath = str_replace( basename( $file ), $thumb, $file );
-
-			// move the thumbnail to its final destination
-			if ( $type[2] == 1 ) {
-				if (!imagegif( $thumbnail, $thumbpath ) ) {
-					$error = __( "Thumbnail path invalid" );
-				}
-			}
-			elseif ( $type[2] == 2 ) {
-				if (!imagejpeg( $thumbnail, $thumbpath ) ) {
-					$error = __( "Thumbnail path invalid" );
-				}
-			}
-			elseif ( $type[2] == 3 ) {
-				if (!imagepng( $thumbnail, $thumbpath ) ) {
-					$error = __( "Thumbnail path invalid" );
-				}
-			}
-
-		}
-	} else {
-		$error = __( 'File not found' );
-	}
-
-	if (!empty ( $error ) ) {
-		return $error;
-	} else {
-		return apply_filters( 'wp_create_thumbnail', $thumbpath );
-	}
+/**
+ * File contains all the administration image manipulation functions.
+ *
+ * @package WordPress
+ * @subpackage Administration
+ */
+
+/**
+ * Create a thumbnail from an Image given a maximum side size.
+ *
+ * This function can handle most image file formats which PHP supports. If PHP
+ * does not have the functionality to save in a file of the same format, the
+ * thumbnail will be created as a jpeg.
+ *
+ * @since 1.2.0
+ *
+ * @param mixed $file Filename of the original image, Or attachment id.
+ * @param int $max_side Maximum length of a single side for the thumbnail.
+ * @param mixed $deprecated Never used.
+ * @return string Thumbnail path on success, Error string on failure.
+ */
+function wp_create_thumbnail( $file, $max_side, $deprecated = '' ) {
+	if ( !empty( $deprecated ) )
+		_deprecated_argument( __FUNCTION__, '1.2' );
+	$thumbpath = image_resize( $file, $max_side, $max_side );
+	return apply_filters( 'wp_create_thumbnail', $thumbpath );
 }
 
+/**
+ * Crop an Image to a given size.
+ *
+ * @since 2.1.0
+ *
+ * @param string|int $src_file 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|false New filepath on success, WP_Error or false on failure.
+ */
 function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
-	if ( ctype_digit( $src_file ) ) // Handle int as attachment ID
+	if ( is_numeric( $src_file ) ) // Handle int as attachment ID
 		$src_file = get_attached_file( $src_file );
 
 	$src = wp_load_image( $src_file );
 
-	if ( !is_resource( $src ))
-		return $src;
+	if ( !is_resource( $src ) )
+		return new WP_Error( 'error_loading_image', $src, $src_file );
 
-	$dst = imagecreatetruecolor( $dst_w, $dst_h );
+	$dst = wp_imagecreatetruecolor( $dst_w, $dst_h );
 
 	if ( $src_abs ) {
 		$src_w -= $src_x;
@@ -124,69 +64,278 @@ function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_
 
 	imagecopyresampled( $dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
 
-	if ( !$dst_file )
-		$dst_file = str_replace( basename( $src_file ), 'cropped-'.basename( $src_file ), $src_file );
+	imagedestroy( $src ); // Free up memory
+
+	if ( ! $dst_file )
+		$dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );
 
 	$dst_file = preg_replace( '/\\.[^\\.]+$/', '.jpg', $dst_file );
 
-	if ( imagejpeg( $dst, $dst_file ) )
+	if ( imagejpeg( $dst, $dst_file, apply_filters( 'jpeg_quality', 90, 'wp_crop_image' ) ) )
 		return $dst_file;
 	else
 		return false;
 }
 
+/**
+ * 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();
-	if ( preg_match('!^image/!', get_post_mime_type( $attachment )) ) {
-		$imagesize = getimagesize($file);
-		$metadata['width'] = $imagesize['0'];
-		$metadata['height'] = $imagesize['1'];
-		list($uwidth, $uheight) = get_udims($metadata['width'], $metadata['height']);
+	if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
+		$imagesize = getimagesize( $file );
+		$metadata['width'] = $imagesize[0];
+		$metadata['height'] = $imagesize[1];
+		list($uwidth, $uheight) = wp_constrain_dimensions($metadata['width'], $metadata['height'], 128, 96);
 		$metadata['hwstring_small'] = "height='$uheight' width='$uwidth'";
-		$metadata['file'] = $file;
 
-		$max = apply_filters( 'wp_thumbnail_creation_size_limit', 3 * 1024 * 1024, $attachment_id, $file );
+		// 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;
+
+		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
+		}
 
-		if ( $max < 0 || $metadata['width'] * $metadata['height'] < $max ) {
-			$max_side = apply_filters( 'wp_thumbnail_max_side_length', 128, $attachment_id, $file );
-			$thumb = wp_create_thumbnail( $file, $max_side );
+		$sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );
 
-			if ( @file_exists($thumb) )
-				$metadata['thumb'] = basename($thumb);
+		foreach ($sizes as $size => $size_data ) {
+			$resized = image_make_intermediate_size( $file, $size_data['width'], $size_data['height'], $size_data['crop'] );
+			if ( $resized )
+				$metadata['sizes'][$size] = $resized;
 		}
+
+		// fetch additional metadata from exif/iptc
+		$image_meta = wp_read_image_metadata( $file );
+		if ( $image_meta )
+			$metadata['image_meta'] = $image_meta;
+
 	}
-	return apply_filters( 'wp_generate_attachment_metadata', $metadata );
+
+	return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
 }
 
-function wp_load_image( $file ) {
-	if ( ctype_digit( $file ) )
-		$file = get_attached_file( $file );
+/**
+ * Calculated the new dimensions for a downsampled image.
+ *
+ * @since 2.0.0
+ * @see wp_constrain_dimensions()
+ *
+ * @param int $width Current width of the image
+ * @param int $height Current height of the image
+ * @return mixed Array(height,width) of shrunk dimensions.
+ */
+function get_udims( $width, $height) {
+	return wp_constrain_dimensions( $width, $height, 128, 96 );
+}
 
-	if ( !file_exists( $file ) )
-		return sprintf(__("File '%s' doesn't exist?"), $file);
+/**
+ * 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;
+}
 
-	if ( ! function_exists('imagecreatefromstring') )
-		return __('The GD image library is not installed.');
+/**
+ * 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}" );
+}
 
-	$contents = file_get_contents( $file );
+/**
+ * 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;
 
-	$image = imagecreatefromstring( $contents );
+	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'] = utf8_encode( 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'] = utf8_encode( trim( $iptc['2#005'][0] ) );
+
+			if ( ! empty( $iptc['2#120'][0] ) ) { // description / legacy caption
+				$caption = utf8_encode( 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
+				$meta['credit'] = utf8_encode(trim($iptc['2#110'][0]));
+			elseif ( ! empty( $iptc['2#080'][0] ) ) // creator / legacy byline
+				$meta['credit'] = utf8_encode(trim($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 ( !is_resource( $image ) )
-		return sprintf(__("File '%s' is not an image."), $file);
+			if ( ! empty( $iptc['2#116'][0] ) ) // copyright
+				$meta['copyright'] = utf8_encode( 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'] = utf8_encode( trim( $exif['Title'] ) );
+
+		if ( ! empty( $exif['ImageDescription'] ) ) {
+			if ( empty( $meta['title'] ) && strlen( $exif['ImageDescription'] ) < 80 ) {
+				// Assume the title is stored in ImageDescription
+				$meta['title'] = utf8_encode( trim( $exif['ImageDescription'] ) );
+				if ( ! empty( $exif['COMPUTED']['UserComment'] ) && trim( $exif['COMPUTED']['UserComment'] ) != $meta['title'] )
+					$meta['caption'] = utf8_encode( trim( $exif['COMPUTED']['UserComment'] ) );
+			} elseif ( trim( $exif['ImageDescription'] ) != $meta['title'] ) {
+				$meta['caption'] = utf8_encode( trim( $exif['ImageDescription'] ) );
+			}
+		} elseif ( ! empty( $exif['Comments'] ) && trim( $exif['Comments'] ) != $meta['title'] ) {
+			$meta['caption'] = utf8_encode( trim( $exif['Comments'] ) );
+		}
+
+		if ( ! empty( $exif['Artist'] ) )
+			$meta['credit'] = utf8_encode( trim( $exif['Artist'] ) );
+		elseif ( ! empty($exif['Author'] ) )
+			$meta['credit'] = utf8_encode( trim( $exif['Author'] ) );
+
+		if ( ! empty( $exif['Copyright'] ) )
+			$meta['copyright'] = utf8_encode( trim( $exif['Copyright'] ) );
+		if ( ! empty($exif['FNumber'] ) )
+			$meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
+		if ( ! empty($exif['Model'] ) )
+			$meta['camera'] = utf8_encode( trim( $exif['Model'] ) );
+		if ( ! empty($exif['DateTimeDigitized'] ) )
+			$meta['created_timestamp'] = wp_exif_date2ts($exif['DateTimeDigitized'] );
+		if ( ! empty($exif['FocalLength'] ) )
+			$meta['focal_length'] = wp_exif_frac2dec( $exif['FocalLength'] );
+		if ( ! empty($exif['ISOSpeedRatings'] ) )
+			$meta['iso'] = utf8_encode( trim( $exif['ISOSpeedRatings'] ) );
+		if ( ! empty($exif['ExposureTime'] ) )
+			$meta['shutter_speed'] = wp_exif_frac2dec( $exif['ExposureTime'] );
+	}
+
+	return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType );
 
-	return $image;
 }
 
-function wp_shrink_dimensions( $width, $height, $wmax = 128, $hmax = 96 ) {
-	if ( $height <= $hmax && $width <= $wmax )
-		return array( $width, $height);
-	elseif ( $width / $height > $wmax / $hmax )
-		return array( $wmax, (int) ($height / $width * $wmax ));
-	else
-		return array( (int) ($width / $height * $hmax ), $hmax );
+/**
+ * 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);
+}