X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/3e7fab96d7874067884348df10bbdcdefa4a89ad..refs/tags/wordpress-2.8.3-scripts:/wp-admin/includes/image.php diff --git a/wp-admin/includes/image.php b/wp-admin/includes/image.php index ec4466e5..c0632ac5 100644 --- a/wp-admin/includes/image.php +++ b/wp-admin/includes/image.php @@ -1,110 +1,47 @@ 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. + * @return string Thumbnail path on success, Error string on failure. + */ +function wp_create_thumbnail( $file, $max_side, $deprecated = '' ) { + $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 New filepath on success, String error message 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 ); @@ -124,69 +61,270 @@ 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 image 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) ) { + $full_path_file = $file; + $imagesize = getimagesize( $full_path_file ); + $metadata['width'] = $imagesize[0]; + $metadata['height'] = $imagesize[1]; + list($uwidth, $uheight) = wp_shrink_dimensions($metadata['width'], $metadata['height']); $metadata['hwstring_small'] = "height='$uheight' width='$uwidth'"; - $metadata['file'] = $file; - $max = apply_filters( 'wp_thumbnail_creation_size_limit', 3 * 1024 * 1024, $attachment_id, $file ); + // Make the file path relative to the upload dir + if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { // Get upload directory + if ( 0 === strpos($file, $uploads['basedir']) ) {// Check that the upload base exists in the file path + $file = str_replace($uploads['basedir'], '', $file); // Remove upload dir from the file path + $file = ltrim($file, '/'); + } + } + $metadata['file'] = $file; - 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 ); + // make thumbnails and other intermediate sizes + $sizes = array('thumbnail', 'medium', 'large'); + $sizes = apply_filters('intermediate_image_sizes', $sizes); - if ( @file_exists($thumb) ) - $metadata['thumb'] = basename($thumb); + foreach ($sizes as $size) { + $resized = image_make_intermediate_size( $full_path_file, get_option("{$size}_size_w"), get_option("{$size}_size_h"), get_option("{$size}_crop") ); + if ( $resized ) + $metadata['sizes'][$size] = $resized; } + + // fetch additional metadata from exif/iptc + $image_meta = wp_read_image_metadata( $full_path_file ); + if ($image_meta) + $metadata['image_meta'] = $image_meta; + } + return apply_filters( 'wp_generate_attachment_metadata', $metadata ); } +/** + * Load an image from a string, if PHP supports it. + * + * @since 2.1.0 + * + * @param string $file Filename of the image to load. + * @return resource The resulting image resource on success, Error string on failure. + */ function wp_load_image( $file ) { - if ( ctype_digit( $file ) ) + if ( is_numeric( $file ) ) $file = get_attached_file( $file ); - if ( !file_exists( $file ) ) - return sprintf(__("File '%s' doesn't exist?"), $file); + if ( ! file_exists( $file ) ) + return sprintf(__('File “%s” doesn’t exist?'), $file); if ( ! function_exists('imagecreatefromstring') ) return __('The GD image library is not installed.'); - $contents = file_get_contents( $file ); - - $image = imagecreatefromstring( $contents ); + // Set artificially high because GD uses uncompressed images in memory + @ini_set('memory_limit', '256M'); + $image = imagecreatefromstring( file_get_contents( $file ) ); if ( !is_resource( $image ) ) - return sprintf(__("File '%s' is not an image."), $file); + return sprintf(__('File “%s” is not an image.'), $file); return $image; } +/** + * Calculated the new dimentions for a downsampled image. + * + * @since 2.0.0 + * @see wp_shrink_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_shrink_dimensions( $width, $height ); +} + +/** + * Calculates the new dimentions 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 + * @param int $wmax Maximum wanted width + * @param int $hmax Maximum wanted height + * @return mixed Array(height,width) of shrunk dimensions. + */ 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 )); + return wp_constrain_dimensions( $width, $height, $wmax, $hmax ); +} + +/** + * 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']); + if ( !empty($iptc['2#110'][0]) ) // credit + $meta['credit'] = utf8_encode(trim($iptc['2#110'][0])); + elseif ( !empty($iptc['2#080'][0]) ) // 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] . ' ' . $iptc['2#060'][0]); + if ( !empty($iptc['2#120'][0]) ) // caption + $meta['caption'] = utf8_encode(trim($iptc['2#120'][0])); + if ( !empty($iptc['2#116'][0]) ) // copyright + $meta['copyright'] = utf8_encode(trim($iptc['2#116'][0])); + if ( !empty($iptc['2#005'][0]) ) // title + $meta['title'] = utf8_encode(trim($iptc['2#005'][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['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'] = wp_exif_frac2dec( $exif['FocalLength'] ); + if (!empty($exif['ISOSpeedRatings'])) + $meta['iso'] = $exif['ISOSpeedRatings']; + if (!empty($exif['ExposureTime'])) + $meta['shutter_speed'] = wp_exif_frac2dec( $exif['ExposureTime'] ); + } + + 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 + $result = false; else - return array( (int) ($width / $height * $hmax ), $hmax ); + $result = true; + + return apply_filters('file_is_displayable_image', $result, $path); } ?>