Creating intermediate sizes, better thumbnails, and other image improvements. Hat tip: tellyworth.
git-svn-id: http://svn.automattic.com/wordpress/trunk@7135 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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matt
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bb22054028
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@ -17,63 +17,8 @@
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* If PHP does not have the functionality to save in a file of the same format, the thumbnail will be created as a jpeg.
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*/
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function wp_create_thumbnail( $file, $max_side, $deprecated = '' ) {
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if ( ctype_digit( $file ) ) // Handle int as attachment ID
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$file = get_attached_file( $file );
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$image = wp_load_image( $file );
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if ( !is_resource( $image ) )
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return $image;
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list($sourceImageWidth, $sourceImageHeight, $sourceImageType) = getimagesize( $file );
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if ( function_exists( 'imageantialias' ))
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imageantialias( $image, true );
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list($image_new_width, $image_new_height) = wp_shrink_dimensions( $sourceImageWidth, $sourceImageHeight, $max_side, $max_side);
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$thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height);
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// preserve PNG transparency
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if ( IMAGETYPE_PNG == $sourceImageType && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
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imagealphablending( $thumbnail, false);
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imagesavealpha( $thumbnail, true);
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}
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imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $sourceImageWidth, $sourceImageHeight );
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imagedestroy( $image ); // Free up memory
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// If no filters change the filename, we'll do a default transformation.
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if ( basename( $file ) == $thumb = apply_filters( 'thumbnail_filename', basename( $file ) ) )
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$thumb = preg_replace( '!(\.[^.]+)?$!', '.thumbnail$1', basename( $file ), 1 );
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$thumbpath = str_replace( basename( $file ), $thumb, $file );
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switch( $sourceImageType ){
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default: // We'll create a Jpeg if we cant use its native file format
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$thumb = preg_replace( '/\\.[^\\.]+$/', '.jpg', $thumb ); //Change file extension to Jpg
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case IMAGETYPE_JPEG:
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if (!imagejpeg( $thumbnail, $thumbpath ) )
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return __( 'Thumbnail path invalid' );
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break;
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case IMAGETYPE_GIF:
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if (!imagegif( $thumbnail, $thumbpath ) )
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return __( 'Thumbnail path invalid' );
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break;
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case IMAGETYPE_PNG:
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if (!imagepng( $thumbnail, $thumbpath ) )
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return __( 'Thumbnail path invalid' );
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break;
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}
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imagedestroy( $thumbnail ); // Free up memory
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// Set correct file permissions
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$stat = stat( dirname( $thumbpath ));
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$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
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@ chmod( $thumbpath, $perms );
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$thumbpath = image_resize( $file, $max_side, $max_side );
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return apply_filters( 'wp_create_thumbnail', $thumbpath );
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}
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@ -142,7 +87,7 @@ function wp_generate_attachment_metadata( $attachment_id, $file ) {
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$attachment = get_post( $attachment_id );
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$metadata = array();
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if ( preg_match('!^image/!', get_post_mime_type( $attachment )) ) {
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if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
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$imagesize = getimagesize( $file );
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$metadata['width'] = $imagesize[0];
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$metadata['height'] = $imagesize[1];
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@ -150,15 +95,16 @@ function wp_generate_attachment_metadata( $attachment_id, $file ) {
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$metadata['hwstring_small'] = "height='$uheight' width='$uwidth'";
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$metadata['file'] = $file;
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$max = apply_filters( 'wp_thumbnail_creation_size_limit', absint( WP_MEMORY_LIMIT ) * 1024 * 1024, $attachment_id, $file );
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if ( $max < 0 || $metadata['width'] * $metadata['height'] < $max ) {
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$max_side = apply_filters( 'wp_thumbnail_max_side_length', 140, $attachment_id, $file );
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$thumb = wp_create_thumbnail( $file, $max_side );
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if ( @file_exists($thumb) )
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$metadata['thumb'] = basename($thumb);
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// make thumbnails and other intermediate sizes
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$sizes = array('thumbnail', 'medium');
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$sizes = apply_filters('intermediate_image_sizes', $sizes);
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foreach ($sizes as $size) {
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$resized = image_make_intermediate_size( $file, get_option("{$size}_size_w"), get_option("{$size}_size_h"), get_option("{$size}_crop") );
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if ( $resized )
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$metadata['sizes'][$size] = $resized;
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}
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// fetch additional metadata from exif/iptc
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$image_meta = wp_read_image_metadata( $file );
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if ($image_meta)
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@ -309,5 +255,28 @@ function wp_read_image_metadata( $file ) {
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}
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// is the file a real image file?
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function file_is_valid_image($path) {
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$size = @getimagesize($path);
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return !empty($size);
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}
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// is the file an image suitable for displaying within a web page?
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function file_is_displayable_image($path) {
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$info = @getimagesize($path);
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if ( empty($info) )
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$result = false;
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elseif ( !in_array($info[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG)) )
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// only gif, jpeg and png images can reliably be displayed
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$result = false;
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elseif ( $info['channels'] > 0 && $info['channels'] != 3 ) {
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// some web browsers can't display cmyk or grayscale jpegs
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$result = false;
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}
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else
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$result = true;
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return apply_filters('file_is_displayable_image', $result, $path);
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}
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?>
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@ -55,7 +55,7 @@ function get_image_send_to_editor($id, $alt, $title, $align, $url='', $rel = fal
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$rel = $rel ? ' rel="attachment wp-att-'.attribute_escape($id).'"' : '';
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if ( $url )
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$html = "<a href='".attribute_escape($url)."'$rel>$html</a>";
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elseif ( $size == 'thumb' || $size == 'medium' )
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elseif ( $size == 'thumbnail' || $size == 'medium' )
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$html = '<a href="'.get_attachment_link($id).'"'.$rel.'>'.$html.'</a>';
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$html = apply_filters( 'image_send_to_editor', $html, $id, $alt, $title, $align, $url );
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@ -467,7 +467,7 @@ function image_attachment_fields_to_edit($form_fields, $post) {
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'label' => __('Size'),
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'input' => 'html',
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'html' => "
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" . ( $thumb ? "<input type='radio' name='attachments[$post->ID][image-size]' id='image-size-thumb-$post->ID' value='thumb' />
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" . ( $thumb ? "<input type='radio' name='attachments[$post->ID][image-size]' id='image-size-thumb-$post->ID' value='thumbnail' />
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<label for='image-size-thumb-$post->ID'>" . __('Thumbnail') . "</label>
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" : '' ) . "<input type='radio' name='attachments[$post->ID][image-size]' id='image-size-medium-$post->ID' value='medium' checked='checked' />
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<label for='image-size-medium-$post->ID'>" . __('Medium') . "</label>
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@ -244,6 +244,11 @@ function populate_options() {
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add_option('show_avatars', '1');
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add_option('avatar_rating', 'G');
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add_option('upload_url_path', '');
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add_option('thumbnail_size_w', 150);
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add_option('thumbnail_size_h', 150);
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add_option('thumbnail_crop', 1);
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add_option('medium_size_w', '');
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add_option('medium_size_h', '');
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// Delete unused options
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$unusedoptions = array ('blodotgsping_url', 'bodyterminator', 'emailtestonly', 'phoneemail_separator', 'smilies_directory', 'subjectprefix', 'use_bbcode', 'use_blodotgsping', 'use_phoneemail', 'use_quicktags', 'use_weblogsping', 'weblogs_cache_file', 'use_preview', 'use_htmltrans', 'smilies_directory', 'fileupload_allowedusers', 'use_phoneemail', 'default_post_status', 'default_post_category', 'archive_mode', 'time_difference', 'links_minadminlevel', 'links_use_adminlevels', 'links_rating_type', 'links_rating_char', 'links_rating_ignore_zero', 'links_rating_single_image', 'links_rating_image0', 'links_rating_image1', 'links_rating_image2', 'links_rating_image3', 'links_rating_image4', 'links_rating_image5', 'links_rating_image6', 'links_rating_image7', 'links_rating_image8', 'links_rating_image9', 'weblogs_cacheminutes', 'comment_allowed_tags', 'search_engine_friendly_urls', 'default_geourl_lat', 'default_geourl_lon', 'use_default_geourl', 'weblogs_xml_url', 'new_users_can_blog', '_wpnonce', '_wp_http_referer', 'Update', 'action', 'rich_editing');
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@ -68,6 +68,8 @@ endforeach;
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<input name="thumbnail_size_w" type="text" id="thumbnail_size_w" value="<?php form_option('thumbnail_size_w'); ?>" size="6" />
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<label for="thumbnail_size_h"><?php _e('Height'); ?></label>
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<input name="thumbnail_size_h" type="text" id="thumbnail_size_h" value="<?php form_option('thumbnail_size_h'); ?>" size="6" />
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<input name="thumbnail_crop" type="checkbox" id="thumbnail_crop" value="1" <?php checked('1', get_option('thumbnail_crop')); ?>/>
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<label for="thumbnail_crop"><?php _e('Crop to size'); ?></label>
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</td>
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</tr>
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<tr valign="top">
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@ -134,7 +136,7 @@ endforeach;
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<p class="submit">
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<input type="hidden" name="action" value="update" />
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<input type="hidden" name="page_options" value="default_post_edit_rows,use_smilies,ping_sites,mailserver_url,mailserver_port,mailserver_login,mailserver_pass,default_category,default_email_category,use_balanceTags,default_link_category" />
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<input type="hidden" name="page_options" value="default_post_edit_rows,use_smilies,ping_sites,mailserver_url,mailserver_port,mailserver_login,mailserver_pass,default_category,default_email_category,use_balanceTags,default_link_category,thumbnail_size_w,thumbnail_size_h,thumbnail_crop,medium_size_w,medium_size_h" />
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<input type="submit" name="Submit" value="<?php _e('Save Changes') ?>" />
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</p>
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</form>
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@ -48,7 +48,7 @@ function image_hwstring($width, $height) {
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}
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// Scale an image to fit a particular size (such as 'thumb' or 'medium'), and return an image URL, height and width.
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// The URL might be the original image, or it might be a resized version.
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// The URL might be the original image, or it might be a resized version. This function won't create a new resized copy, it will just return an already resized one if it exists.
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// returns an array($url, $width, $height)
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function image_downsize($id, $size = 'medium') {
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@ -60,15 +60,19 @@ function image_downsize($id, $size = 'medium') {
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if ( $out = apply_filters('image_downsize', false, $id, $size) )
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return $out;
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if ( $size == 'thumb' ) {
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// thumbnail: use the thumb as the displayed image, and constrain based on its dimensions
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$thumb_path = wp_get_attachment_thumb_file($id);
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// the actual thumbnail size isn't stored so we'll have to calculate it
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if ( $thumb_path && ($info = getimagesize($thumb_path)) ) {
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list( $width, $height ) = image_constrain_size_for_editor( $info[0], $info[1], $size );
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$img_url = wp_get_attachment_thumb_url($id);
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// try for a new style intermediate size
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if ( $intermediate = image_get_intermediate_size($id, $size) ) {
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$img_url = str_replace(basename($img_url), $intermediate['file'], $img_url);
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$width = $intermediate['width'];
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$height = $intermediate['height'];
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}
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elseif ( $size == 'thumbnail' ) {
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// fall back to the old thumbnail
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if ( $thumb_file = wp_get_attachment_thumb_file() && $info = getimagesize($thumb_file) ) {
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$img_url = str_replace(basename($img_url), basename($thumb_file), $img_url);
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$width = $info[0];
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$height = $info[1];
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}
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// this could be improved to provide a default thumbnail if one doesn't exist
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}
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elseif ( isset($meta['width'], $meta['height']) ) {
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// any other type: use the real image and constrain it
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@ -226,4 +230,31 @@ function image_resize( $file, $max_w, $max_h, $crop=false, $suffix=null, $dest_p
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return $destfilename;
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}
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?>
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// resize an image to make a thumbnail or intermediate size, and return metadata describing the new copy
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// returns false if no image was created
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function image_make_intermediate_size($file, $width, $height, $crop=false) {
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if ( $width || $height ) {
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$resized_file = image_resize($file, $width, $height, $crop);
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if ( $resized_file && $info = getimagesize($resized_file) ) {
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return array(
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'file' => basename( $resized_file ),
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'width' => $info[0],
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'height' => $info[1],
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);
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}
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}
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return false;
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}
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function image_get_intermediate_size($post_id, $size='thumbnail') {
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if ( !$imagedata = wp_get_attachment_metadata( $post_id ) )
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return false;
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if ( empty($imagedata['sizes'][$size]) )
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return false;
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return $imagedata['sizes'][$size];
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}
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?>
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@ -389,11 +389,10 @@ function get_attachment_icon_src( $id = 0, $fullsize = false ) {
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$file = get_attached_file( $post->ID );
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if ( !$fullsize && $thumbfile = wp_get_attachment_thumb_file( $post->ID ) ) {
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if ( !$fullsize && $src = wp_get_attachment_thumb_url( $post->ID ) ) {
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// We have a thumbnail desired, specified and existing
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$src = wp_get_attachment_thumb_url( $post->ID );
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$src_file = $thumbfile;
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$src_file = basename($src);
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$class = 'attachmentthumb';
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} elseif ( wp_attachment_is_image( $post->ID ) ) {
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// We have an image without a thumbnail
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@ -2128,7 +2128,7 @@ function wp_insert_attachment($object, $file = false, $parent = 0) {
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if ( $file )
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update_attached_file( $post_ID, $file );
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clean_post_cache($post_ID);
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if ( $update) {
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@ -2316,6 +2316,10 @@ function wp_get_attachment_thumb_url( $post_id = 0 ) {
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return false;
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if ( !$url = wp_get_attachment_url( $post->ID ) )
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return false;
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$sized = image_downsize( $post_id, 'thumbnail' );
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if ( $sized )
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return $sized[0];
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if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
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return false;
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