<?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;
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 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
+ * @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);
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff