| 1 | <?php |
| 2 | /** |
| 3 | * WordPress API for media display. |
| 4 | * |
| 5 | * @package WordPress |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Scale down the default size of an image. |
| 10 | * |
| 11 | * This is so that the image is a better fit for the editor and theme. |
| 12 | * |
| 13 | * The $size parameter accepts either an array or a string. The supported string |
| 14 | * values are 'thumb' or 'thumbnail' for the given thumbnail size or defaults at |
| 15 | * 128 width and 96 height in pixels. Also supported for the string value is |
| 16 | * 'medium' and 'full'. The 'full' isn't actually supported, but any value other |
| 17 | * than the supported will result in the content_width size or 500 if that is |
| 18 | * not set. |
| 19 | * |
| 20 | * Finally, there is a filter named, 'editor_max_image_size' that will be called |
| 21 | * on the calculated array for width and height, respectively. The second |
| 22 | * parameter will be the value that was in the $size parameter. The returned |
| 23 | * type for the hook is an array with the width as the first element and the |
| 24 | * height as the second element. |
| 25 | * |
| 26 | * @since 2.5.0 |
| 27 | * @uses wp_constrain_dimensions() This function passes the widths and the heights. |
| 28 | * |
| 29 | * @param int $width Width of the image |
| 30 | * @param int $height Height of the image |
| 31 | * @param string|array $size Size of what the result image should be. |
| 32 | * @return array Width and height of what the result image should resize to. |
| 33 | */ |
| 34 | function image_constrain_size_for_editor($width, $height, $size = 'medium') { |
| 35 | global $content_width, $_wp_additional_image_sizes; |
| 36 | |
| 37 | if ( is_array($size) ) { |
| 38 | $max_width = $size[0]; |
| 39 | $max_height = $size[1]; |
| 40 | } |
| 41 | elseif ( $size == 'thumb' || $size == 'thumbnail' ) { |
| 42 | $max_width = intval(get_option('thumbnail_size_w')); |
| 43 | $max_height = intval(get_option('thumbnail_size_h')); |
| 44 | // last chance thumbnail size defaults |
| 45 | if ( !$max_width && !$max_height ) { |
| 46 | $max_width = 128; |
| 47 | $max_height = 96; |
| 48 | } |
| 49 | } |
| 50 | elseif ( $size == 'medium' ) { |
| 51 | $max_width = intval(get_option('medium_size_w')); |
| 52 | $max_height = intval(get_option('medium_size_h')); |
| 53 | // if no width is set, default to the theme content width if available |
| 54 | } |
| 55 | elseif ( $size == 'large' ) { |
| 56 | // we're inserting a large size image into the editor. if it's a really |
| 57 | // big image we'll scale it down to fit reasonably within the editor |
| 58 | // itself, and within the theme's content width if it's known. the user |
| 59 | // can resize it in the editor if they wish. |
| 60 | $max_width = intval(get_option('large_size_w')); |
| 61 | $max_height = intval(get_option('large_size_h')); |
| 62 | if ( intval($content_width) > 0 ) |
| 63 | $max_width = min( intval($content_width), $max_width ); |
| 64 | } elseif ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ) ) ) { |
| 65 | $max_width = intval( $_wp_additional_image_sizes[$size]['width'] ); |
| 66 | $max_height = intval( $_wp_additional_image_sizes[$size]['height'] ); |
| 67 | if ( intval($content_width) > 0 && is_admin() ) // Only in admin. Assume that theme authors know what they're doing. |
| 68 | $max_width = min( intval($content_width), $max_width ); |
| 69 | } |
| 70 | // $size == 'full' has no constraint |
| 71 | else { |
| 72 | $max_width = $width; |
| 73 | $max_height = $height; |
| 74 | } |
| 75 | |
| 76 | list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size ); |
| 77 | |
| 78 | return wp_constrain_dimensions( $width, $height, $max_width, $max_height ); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Retrieve width and height attributes using given width and height values. |
| 83 | * |
| 84 | * Both attributes are required in the sense that both parameters must have a |
| 85 | * value, but are optional in that if you set them to false or null, then they |
| 86 | * will not be added to the returned string. |
| 87 | * |
| 88 | * You can set the value using a string, but it will only take numeric values. |
| 89 | * If you wish to put 'px' after the numbers, then it will be stripped out of |
| 90 | * the return. |
| 91 | * |
| 92 | * @since 2.5.0 |
| 93 | * |
| 94 | * @param int|string $width Optional. Width attribute value. |
| 95 | * @param int|string $height Optional. Height attribute value. |
| 96 | * @return string HTML attributes for width and, or height. |
| 97 | */ |
| 98 | function image_hwstring($width, $height) { |
| 99 | $out = ''; |
| 100 | if ($width) |
| 101 | $out .= 'width="'.intval($width).'" '; |
| 102 | if ($height) |
| 103 | $out .= 'height="'.intval($height).'" '; |
| 104 | return $out; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Scale an image to fit a particular size (such as 'thumb' or 'medium'). |
| 109 | * |
| 110 | * Array with image url, width, height, and whether is intermediate size, in |
| 111 | * that order is returned on success is returned. $is_intermediate is true if |
| 112 | * $url is a resized image, false if it is the original. |
| 113 | * |
| 114 | * The URL might be the original image, or it might be a resized version. This |
| 115 | * function won't create a new resized copy, it will just return an already |
| 116 | * resized one if it exists. |
| 117 | * |
| 118 | * A plugin may use the 'image_downsize' filter to hook into and offer image |
| 119 | * resizing services for images. The hook must return an array with the same |
| 120 | * elements that are returned in the function. The first element being the URL |
| 121 | * to the new image that was resized. |
| 122 | * |
| 123 | * @since 2.5.0 |
| 124 | * @uses apply_filters() Calls 'image_downsize' on $id and $size to provide |
| 125 | * resize services. |
| 126 | * |
| 127 | * @param int $id Attachment ID for image. |
| 128 | * @param string $size Optional, default is 'medium'. Size of image, can be 'thumbnail'. |
| 129 | * @return bool|array False on failure, array on success. |
| 130 | */ |
| 131 | function image_downsize($id, $size = 'medium') { |
| 132 | |
| 133 | if ( !wp_attachment_is_image($id) ) |
| 134 | return false; |
| 135 | |
| 136 | $img_url = wp_get_attachment_url($id); |
| 137 | $meta = wp_get_attachment_metadata($id); |
| 138 | $width = $height = 0; |
| 139 | $is_intermediate = false; |
| 140 | |
| 141 | // plugins can use this to provide resize services |
| 142 | if ( $out = apply_filters('image_downsize', false, $id, $size) ) |
| 143 | return $out; |
| 144 | |
| 145 | // try for a new style intermediate size |
| 146 | if ( $intermediate = image_get_intermediate_size($id, $size) ) { |
| 147 | $img_url = str_replace(basename($img_url), $intermediate['file'], $img_url); | //Arbitrary file disclosing
|
| 148 | $width = $intermediate['width']; |
| 149 | $height = $intermediate['height']; |
| 150 | $is_intermediate = true; |
| 151 | } |
| 152 | elseif ( $size == 'thumbnail' ) { |
| 153 | // fall back to the old thumbnail |
| 154 | if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) { |
| 155 | $img_url = str_replace(basename($img_url), basename($thumb_file), $img_url); | //Arbitrary file disclosing
|
| 156 | $width = $info[0]; |
| 157 | $height = $info[1]; |
| 158 | $is_intermediate = true; |
| 159 | } |
| 160 | } |
| 161 | if ( !$width && !$height && isset($meta['width'], $meta['height']) ) { |
| 162 | // any other type: use the real image |
| 163 | $width = $meta['width']; |
| 164 | $height = $meta['height']; |
| 165 | } |
| 166 | |
| 167 | if ( $img_url) { |
| 168 | // we have the actual image size, but might need to further constrain it if content_width is narrower |
| 169 | list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size ); |
| 170 | |
| 171 | return array( $img_url, $width, $height, $is_intermediate ); |
| 172 | } |
| 173 | return false; |
| 174 | |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Registers a new image size |
| 179 | */ |
| 180 | function add_image_size( $name, $width = 0, $height = 0, $crop = FALSE ) { |
| 181 | global $_wp_additional_image_sizes; |
| 182 | $_wp_additional_image_sizes[$name] = array( 'width' => absint( $width ), 'height' => absint( $height ), 'crop' => !!$crop ); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Registers an image size for the post thumbnail |
| 187 | */ |
| 188 | function set_post_thumbnail_size( $width = 0, $height = 0, $crop = FALSE ) { |
| 189 | add_image_size( 'post-thumbnail', $width, $height, $crop ); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * An <img src /> tag for an image attachment, scaling it down if requested. |
| 194 | * |
| 195 | * The filter 'get_image_tag_class' allows for changing the class name for the |
| 196 | * image without having to use regular expressions on the HTML content. The |
| 197 | * parameters are: what WordPress will use for the class, the Attachment ID, |
| 198 | * image align value, and the size the image should be. |
| 199 | * |
| 200 | * The second filter 'get_image_tag' has the HTML content, which can then be |
| 201 | * further manipulated by a plugin to change all attribute values and even HTML |
| 202 | * content. |
| 203 | * |
| 204 | * @since 2.5.0 |
| 205 | * |
| 206 | * @uses apply_filters() The 'get_image_tag_class' filter is the IMG element |
| 207 | * class attribute. |
| 208 | * @uses apply_filters() The 'get_image_tag' filter is the full IMG element with |
| 209 | * all attributes. |
| 210 | * |
| 211 | * @param int $id Attachment ID. |
| 212 | * @param string $alt Image Description for the alt attribute. |
| 213 | * @param string $title Image Description for the title attribute. |
| 214 | * @param string $align Part of the class name for aligning the image. |
| 215 | * @param string $size Optional. Default is 'medium'. |
| 216 | * @return string HTML IMG element for given image attachment |
| 217 | */ |
| 218 | function get_image_tag($id, $alt, $title, $align, $size='medium') { |
| 219 | |
| 220 | list( $img_src, $width, $height ) = image_downsize($id, $size); |
| 221 | $hwstring = image_hwstring($width, $height); |
| 222 | |
| 223 | $class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id; |
| 224 | $class = apply_filters('get_image_tag_class', $class, $id, $align, $size); |
| 225 | |
| 226 | $html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />'; |
| 227 | |
| 228 | $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
| 229 | |
| 230 | return $html; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Load an image from a string, if PHP supports it. |
| 235 | * |
| 236 | * @since 2.1.0 |
| 237 | * |
| 238 | * @param string $file Filename of the image to load. |
| 239 | * @return resource The resulting image resource on success, Error string on failure. |
| 240 | */ |
| 241 | function wp_load_image( $file ) { |
| 242 | if ( is_numeric( $file ) ) |
| 243 | $file = get_attached_file( $file ); | //Arbitrary file disclosing
|
| 244 | |
| 245 | if ( ! file_exists( $file ) ) |
| 246 | return sprintf(__('File “%s” doesn’t exist?'), $file); |
| 247 | |
| 248 | if ( ! function_exists('imagecreatefromstring') ) |
| 249 | return __('The GD image library is not installed.'); |
| 250 | |
| 251 | // Set artificially high because GD uses uncompressed images in memory |
| 252 | @ini_set('memory_limit', '256M'); |
| 253 | $image = imagecreatefromstring( file_get_contents( $file ) ); | //Arbitrary file disclosing
|
| 254 | |
| 255 | if ( !is_resource( $image ) ) |
| 256 | return sprintf(__('File “%s” is not an image.'), $file); |
| 257 | |
| 258 | return $image; |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Calculates the new dimentions for a downsampled image. |
| 263 | * |
| 264 | * If either width or height are empty, no constraint is applied on |
| 265 | * that dimension. |
| 266 | * |
| 267 | * @since 2.5.0 |
| 268 | * |
| 269 | * @param int $current_width Current width of the image. |
| 270 | * @param int $current_height Current height of the image. |
| 271 | * @param int $max_width Optional. Maximum wanted width. |
| 272 | * @param int $max_height Optional. Maximum wanted height. |
| 273 | * @return array First item is the width, the second item is the height. |
| 274 | */ |
| 275 | function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) { |
| 276 | if ( !$max_width and !$max_height ) |
| 277 | return array( $current_width, $current_height ); |
| 278 | |
| 279 | $width_ratio = $height_ratio = 1.0; |
| 280 | $did_width = $did_height = false; |
| 281 | |
| 282 | if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) { |
| 283 | $width_ratio = $max_width / $current_width; |
| 284 | $did_width = true; |
| 285 | } |
| 286 | |
| 287 | if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) { |
| 288 | $height_ratio = $max_height / $current_height; |
| 289 | $did_height = true; |
| 290 | } |
| 291 | |
| 292 | // Calculate the larger/smaller ratios |
| 293 | $smaller_ratio = min( $width_ratio, $height_ratio ); |
| 294 | $larger_ratio = max( $width_ratio, $height_ratio ); |
| 295 | |
| 296 | if ( intval( $current_width * $larger_ratio ) > $max_width || intval( $current_height * $larger_ratio ) > $max_height ) |
| 297 | // The larger ratio is too big. It would result in an overflow. |
| 298 | $ratio = $smaller_ratio; |
| 299 | else |
| 300 | // The larger ratio fits, and is likely to be a more "snug" fit. |
| 301 | $ratio = $larger_ratio; |
| 302 | |
| 303 | $w = intval( $current_width * $ratio ); |
| 304 | $h = intval( $current_height * $ratio ); |
| 305 | |
| 306 | // Sometimes, due to rounding, we'll end up with a result like this: 465x700 in a 177x177 box is 117x176... a pixel short |
| 307 | // We also have issues with recursive calls resulting in an ever-changing result. Contraining to the result of a constraint should yield the original result. |
| 308 | // Thus we look for dimensions that are one pixel shy of the max value and bump them up |
| 309 | if ( $did_width && $w == $max_width - 1 ) |
| 310 | $w = $max_width; // Round it up |
| 311 | if ( $did_height && $h == $max_height - 1 ) |
| 312 | $h = $max_height; // Round it up |
| 313 | |
| 314 | return array( $w, $h ); |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Retrieve calculated resized dimensions for use in imagecopyresampled(). |
| 319 | * |
| 320 | * Calculate dimensions and coordinates for a resized image that fits within a |
| 321 | * specified width and height. If $crop is true, the largest matching central |
| 322 | * portion of the image will be cropped out and resized to the required size. |
| 323 | * |
| 324 | * @since 2.5.0 |
| 325 | * |
| 326 | * @param int $orig_w Original width. |
| 327 | * @param int $orig_h Original height. |
| 328 | * @param int $dest_w New width. |
| 329 | * @param int $dest_h New height. |
| 330 | * @param bool $crop Optional, default is false. Whether to crop image or resize. |
| 331 | * @return bool|array False, on failure. Returned array matches parameters for imagecopyresampled() PHP function. |
| 332 | */ |
| 333 | function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) { |
| 334 | |
| 335 | if ($orig_w <= 0 || $orig_h <= 0) |
| 336 | return false; |
| 337 | // at least one of dest_w or dest_h must be specific |
| 338 | if ($dest_w <= 0 && $dest_h <= 0) |
| 339 | return false; |
| 340 | |
| 341 | if ( $crop ) { |
| 342 | // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h |
| 343 | $aspect_ratio = $orig_w / $orig_h; |
| 344 | $new_w = min($dest_w, $orig_w); |
| 345 | $new_h = min($dest_h, $orig_h); |
| 346 | |
| 347 | if ( !$new_w ) { |
| 348 | $new_w = intval($new_h * $aspect_ratio); |
| 349 | } |
| 350 | |
| 351 | if ( !$new_h ) { |
| 352 | $new_h = intval($new_w / $aspect_ratio); |
| 353 | } |
| 354 | |
| 355 | $size_ratio = max($new_w / $orig_w, $new_h / $orig_h); |
| 356 | |
| 357 | $crop_w = round($new_w / $size_ratio); |
| 358 | $crop_h = round($new_h / $size_ratio); |
| 359 | |
| 360 | $s_x = floor( ($orig_w - $crop_w) / 2 ); |
| 361 | $s_y = floor( ($orig_h - $crop_h) / 2 ); |
| 362 | } else { |
| 363 | // don't crop, just resize using $dest_w x $dest_h as a maximum bounding box |
| 364 | $crop_w = $orig_w; |
| 365 | $crop_h = $orig_h; |
| 366 | |
| 367 | $s_x = 0; |
| 368 | $s_y = 0; |
| 369 | |
| 370 | list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h ); |
| 371 | } |
| 372 | |
| 373 | // if the resulting image would be the same size or larger we don't want to resize it |
| 374 | if ( $new_w >= $orig_w && $new_h >= $orig_h ) |
| 375 | return false; |
| 376 | |
| 377 | // the return array matches the parameters to imagecopyresampled() |
| 378 | // int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h |
| 379 | return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h ); |
| 380 | |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * Scale down an image to fit a particular size and save a new copy of the image. |
| 385 | * |
| 386 | * The PNG transparency will be preserved using the function, as well as the |
| 387 | * image type. If the file going in is PNG, then the resized image is going to |
| 388 | * be PNG. The only supported image types are PNG, GIF, and JPEG. |
| 389 | * |
| 390 | * Some functionality requires API to exist, so some PHP version may lose out |
| 391 | * support. This is not the fault of WordPress (where functionality is |
| 392 | * downgraded, not actual defects), but of your PHP version. |
| 393 | * |
| 394 | * @since 2.5.0 |
| 395 | * |
| 396 | * @param string $file Image file path. |
| 397 | * @param int $max_w Maximum width to resize to. |
| 398 | * @param int $max_h Maximum height to resize to. |
| 399 | * @param bool $crop Optional. Whether to crop image or resize. |
| 400 | * @param string $suffix Optional. File Suffix. |
| 401 | * @param string $dest_path Optional. New image file path. |
| 402 | * @param int $jpeg_quality Optional, default is 90. Image quality percentage. |
| 403 | * @return mixed WP_Error on failure. String with new destination path. |
| 404 | */ |
| 405 | function image_resize( $file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90 ) { |
| 406 | |
| 407 | $image = wp_load_image( $file ); |
| 408 | if ( !is_resource( $image ) ) |
| 409 | return new WP_Error( 'error_loading_image', $image, $file ); |
| 410 | |
| 411 | $size = @getimagesize( $file ); |
| 412 | if ( !$size ) |
| 413 | return new WP_Error('invalid_image', __('Could not read image size'), $file); |
| 414 | list($orig_w, $orig_h, $orig_type) = $size; |
| 415 | |
| 416 | $dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop); |
| 417 | if ( !$dims ) |
| 418 | return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') ); |
| 419 | list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims; |
| 420 | |
| 421 | $newimage = wp_imagecreatetruecolor( $dst_w, $dst_h ); |
| 422 | |
| 423 | imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h); |
| 424 | |
| 425 | // convert from full colors to index colors, like original PNG. |
| 426 | if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $image ) ) |
| 427 | imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) ); |
| 428 | |
| 429 | // we don't need the original in memory anymore |
| 430 | imagedestroy( $image ); |
| 431 | |
| 432 | // $suffix will be appended to the destination filename, just before the extension |
| 433 | if ( !$suffix ) |
| 434 | $suffix = "{$dst_w}x{$dst_h}"; |
| 435 | |
| 436 | $info = pathinfo($file); |
| 437 | $dir = $info['dirname']; |
| 438 | $ext = $info['extension']; |
| 439 | $name = basename($file, ".{$ext}"); | //Arbitrary file disclosing
|
| 440 | if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) ) |
| 441 | $dir = $_dest_path; |
| 442 | $destfilename = "{$dir}/{$name}-{$suffix}.{$ext}"; |
| 443 | |
| 444 | if ( IMAGETYPE_GIF == $orig_type ) { |
| 445 | if ( !imagegif( $newimage, $destfilename ) ) |
| 446 | return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); |
| 447 | } elseif ( IMAGETYPE_PNG == $orig_type ) { |
| 448 | if ( !imagepng( $newimage, $destfilename ) ) |
| 449 | return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); |
| 450 | } else { |
| 451 | // all other formats are converted to jpg |
| 452 | $destfilename = "{$dir}/{$name}-{$suffix}.jpg"; |
| 453 | if ( !imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ) ) |
| 454 | return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); |
| 455 | } |
| 456 | |
| 457 | imagedestroy( $newimage ); |
| 458 | |
| 459 | // Set correct file permissions |
| 460 | $stat = stat( dirname( $destfilename )); |
| 461 | $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits |
| 462 | @ chmod( $destfilename, $perms ); | //Arbitrary file manipulations
|
| 463 | |
| 464 | return $destfilename; |
| 465 | } |
| 466 | |
| 467 | /** |
| 468 | * Resize an image to make a thumbnail or intermediate size. |
| 469 | * |
| 470 | * The returned array has the file size, the image width, and image height. The |
| 471 | * filter 'image_make_intermediate_size' can be used to hook in and change the |
| 472 | * values of the returned array. The only parameter is the resized file path. |
| 473 | * |
| 474 | * @since 2.5.0 |
| 475 | * |
| 476 | * @param string $file File path. |
| 477 | * @param int $width Image width. |
| 478 | * @param int $height Image height. |
| 479 | * @param bool $crop Optional, default is false. Whether to crop image to specified height and width or resize. |
| 480 | * @return bool|array False, if no image was created. Metadata array on success. |
| 481 | */ |
| 482 | function image_make_intermediate_size($file, $width, $height, $crop=false) { |
| 483 | if ( $width || $height ) { |
| 484 | $resized_file = image_resize($file, $width, $height, $crop); | //Arbitrary file disclosing
|
| 485 | if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) { |
| 486 | $resized_file = apply_filters('image_make_intermediate_size', $resized_file); |
| 487 | return array( |
| 488 | 'file' => basename( $resized_file ), |
| 489 | 'width' => $info[0], |
| 490 | 'height' => $info[1], |
| 491 | ); |
| 492 | } |
| 493 | } |
| 494 | return false; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * Retrieve the image's intermediate size (resized) path, width, and height. |
| 499 | * |
| 500 | * The $size parameter can be an array with the width and height respectively. |
| 501 | * If the size matches the 'sizes' metadata array for width and height, then it |
| 502 | * will be used. If there is no direct match, then the nearest image size larger |
| 503 | * than the specified size will be used. If nothing is found, then the function |
| 504 | * will break out and return false. |
| 505 | * |
| 506 | * The metadata 'sizes' is used for compatible sizes that can be used for the |
| 507 | * parameter $size value. |
| 508 | * |
| 509 | * The url path will be given, when the $size parameter is a string. |
| 510 | * |
| 511 | * If you are passing an array for the $size, you should consider using |
| 512 | * add_image_size() so that a cropped version is generated. It's much more |
| 513 | * efficient than having to find the closest-sized image and then having the |
| 514 | * browser scale down the image. |
| 515 | * |
| 516 | * @since 2.5.0 |
| 517 | * @see add_image_size() |
| 518 | * |
| 519 | * @param int $post_id Attachment ID for image. |
| 520 | * @param array|string $size Optional, default is 'thumbnail'. Size of image, either array or string. |
| 521 | * @return bool|array False on failure or array of file path, width, and height on success. |
| 522 | */ |
| 523 | function image_get_intermediate_size($post_id, $size='thumbnail') { |
| 524 | if ( !is_array( $imagedata = wp_get_attachment_metadata( $post_id ) ) ) |
| 525 | return false; |
| 526 | |
| 527 | // get the best one for a specified set of dimensions |
| 528 | if ( is_array($size) && !empty($imagedata['sizes']) ) { |
| 529 | foreach ( $imagedata['sizes'] as $_size => $data ) { |
| 530 | // already cropped to width or height; so use this size |
| 531 | if ( ( $data['width'] == $size[0] && $data['height'] <= $size[1] ) || ( $data['height'] == $size[1] && $data['width'] <= $size[0] ) ) { |
| 532 | $file = $data['file']; | //Arbitrary file disclosing
|
| 533 | list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size ); |
| 534 | return compact( 'file', 'width', 'height' ); |
| 535 | } |
| 536 | // add to lookup table: area => size |
| 537 | $areas[$data['width'] * $data['height']] = $_size; |
| 538 | } |
| 539 | if ( !$size || !empty($areas) ) { |
| 540 | // find for the smallest image not smaller than the desired size |
| 541 | ksort($areas); |
| 542 | foreach ( $areas as $_size ) { |
| 543 | $data = $imagedata['sizes'][$_size]; |
| 544 | if ( $data['width'] >= $size[0] || $data['height'] >= $size[1] ) { |
| 545 | // Skip images with unexpectedly divergent aspect ratios (crops) |
| 546 | // First, we calculate what size the original image would be if constrained to a box the size of the current image in the loop |
| 547 | $maybe_cropped = image_resize_dimensions($imagedata['width'], $imagedata['height'], $data['width'], $data['height'], false ); |
| 548 | // If the size doesn't match within one pixel, then it is of a different aspect ratio, so we skip it, unless it's the thumbnail size |
| 549 | if ( 'thumbnail' != $_size && ( !$maybe_cropped || ( $maybe_cropped[4] != $data['width'] && $maybe_cropped[4] + 1 != $data['width'] ) || ( $maybe_cropped[5] != $data['height'] && $maybe_cropped[5] + 1 != $data['height'] ) ) ) |
| 550 | continue; |
| 551 | // If we're still here, then we're going to use this size |
| 552 | $file = $data['file']; | //Arbitrary file disclosing
|
| 553 | list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size ); |
| 554 | return compact( 'file', 'width', 'height' ); |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | if ( is_array($size) || empty($size) || empty($imagedata['sizes'][$size]) ) |
| 561 | return false; |
| 562 | |
| 563 | $data = $imagedata['sizes'][$size]; |
| 564 | // include the full filesystem path of the intermediate file |
| 565 | if ( empty($data['path']) && !empty($data['file']) ) { |
| 566 | $file_url = wp_get_attachment_url($post_id); |
| 567 | $data['path'] = path_join( dirname($imagedata['file']), $data['file'] ); | //Arbitrary file disclosing
|
| 568 | $data['url'] = path_join( dirname($file_url), $data['file'] ); |
| 569 | } |
| 570 | return $data; |
| 571 | } |
| 572 | |
| 573 | /** |
| 574 | * Get the available image sizes |
| 575 | * @since 3.0.0 |
| 576 | * @return array Returns a filtered array of image size strings |
| 577 | */ |
| 578 | function get_intermediate_image_sizes() { |
| 579 | global $_wp_additional_image_sizes; |
| 580 | $image_sizes = array('thumbnail', 'medium', 'large'); // Standard sizes |
| 581 | if ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) ) |
| 582 | $image_sizes = array_merge( $image_sizes, array_keys( $_wp_additional_image_sizes ) ); |
| 583 | |
| 584 | return apply_filters( 'intermediate_image_sizes', $image_sizes ); |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * Retrieve an image to represent an attachment. |
| 589 | * |
| 590 | * A mime icon for files, thumbnail or intermediate size for images. |
| 591 | * |
| 592 | * @since 2.5.0 |
| 593 | * |
| 594 | * @param int $attachment_id Image attachment ID. |
| 595 | * @param string $size Optional, default is 'thumbnail'. |
| 596 | * @param bool $icon Optional, default is false. Whether it is an icon. |
| 597 | * @return bool|array Returns an array (url, width, height), or false, if no image is available. |
| 598 | */ |
| 599 | function wp_get_attachment_image_src($attachment_id, $size='thumbnail', $icon = false) { |
| 600 | |
| 601 | // get a thumbnail or intermediate image if there is one |
| 602 | if ( $image = image_downsize($attachment_id, $size) ) |
| 603 | return $image; |
| 604 | |
| 605 | $src = false; |
| 606 | |
| 607 | if ( $icon && $src = wp_mime_type_icon($attachment_id) ) { |
| 608 | $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' ); |
| 609 | $src_file = $icon_dir . '/' . basename($src); | //Arbitrary file disclosing
|
| 610 | @list($width, $height) = getimagesize($src_file); |
| 611 | } |
| 612 | if ( $src && $width && $height ) |
| 613 | return array( $src, $width, $height ); |
| 614 | return false; |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * Get an HTML img element representing an image attachment |
| 619 | * |
| 620 | * While $size will accept an array, it is better to register a size with |
| 621 | * add_image_size() so that a cropped version is generated. It's much more |
| 622 | * efficient than having to find the closest-sized image and then having the |
| 623 | * browser scale down the image. |
| 624 | * |
| 625 | * @see add_image_size() |
| 626 | * @uses apply_filters() Calls 'wp_get_attachment_image_attributes' hook on attributes array |
| 627 | * @uses wp_get_attachment_image_src() Gets attachment file URL and dimensions |
| 628 | * @since 2.5.0 |
| 629 | * |
| 630 | * @param int $attachment_id Image attachment ID. |
| 631 | * @param string $size Optional, default is 'thumbnail'. |
| 632 | * @param bool $icon Optional, default is false. Whether it is an icon. |
| 633 | * @return string HTML img element or empty string on failure. |
| 634 | */ |
| 635 | function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = false, $attr = '') { |
| 636 | |
| 637 | $html = ''; |
| 638 | $image = wp_get_attachment_image_src($attachment_id, $size, $icon); |
| 639 | if ( $image ) { |
| 640 | list($src, $width, $height) = $image; |
| 641 | $hwstring = image_hwstring($width, $height); |
| 642 | if ( is_array($size) ) |
| 643 | $size = join('x', $size); |
| 644 | $attachment =& get_post($attachment_id); |
| 645 | $default_attr = array( |
| 646 | 'src' => $src, |
| 647 | 'class' => "attachment-$size", |
| 648 | 'alt' => trim(strip_tags( get_post_meta($attachment_id, '_wp_attachment_image_alt', true) )), // Use Alt field first |
| 649 | 'title' => trim(strip_tags( $attachment->post_title )), |
| 650 | ); |
| 651 | if ( empty($default_attr['alt']) ) |
| 652 | $default_attr['alt'] = trim(strip_tags( $attachment->post_excerpt )); // If not, Use the Caption |
| 653 | if ( empty($default_attr['alt']) ) |
| 654 | $default_attr['alt'] = trim(strip_tags( $attachment->post_title )); // Finally, use the title |
| 655 | |
| 656 | $attr = wp_parse_args($attr, $default_attr); |
| 657 | $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment ); |
| 658 | $attr = array_map( 'esc_attr', $attr ); |
| 659 | $html = rtrim("<img $hwstring"); |
| 660 | foreach ( $attr as $name => $value ) { |
| 661 | $html .= " $name=" . '"' . $value . '"'; |
| 662 | } |
| 663 | $html .= ' />'; |
| 664 | } |
| 665 | |
| 666 | return $html; |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * Adds a 'wp-post-image' class to post thumbnail thumbnails |
| 671 | * Uses the begin_fetch_post_thumbnail_html and end_fetch_post_thumbnail_html action hooks to |
| 672 | * dynamically add/remove itself so as to only filter post thumbnail thumbnails |
| 673 | * |
| 674 | * @since 2.9.0 |
| 675 | * @param array $attr Attributes including src, class, alt, title |
| 676 | * @return array |
| 677 | */ |
| 678 | function _wp_post_thumbnail_class_filter( $attr ) { |
| 679 | $attr['class'] .= ' wp-post-image'; |
| 680 | return $attr; |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Adds _wp_post_thumbnail_class_filter to the wp_get_attachment_image_attributes filter |
| 685 | * |
| 686 | * @since 2.9.0 |
| 687 | */ |
| 688 | function _wp_post_thumbnail_class_filter_add( $attr ) { |
| 689 | add_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' ); |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * Removes _wp_post_thumbnail_class_filter from the wp_get_attachment_image_attributes filter |
| 694 | * |
| 695 | * @since 2.9.0 |
| 696 | */ |
| 697 | function _wp_post_thumbnail_class_filter_remove( $attr ) { |
| 698 | remove_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' ); |
| 699 | } |
| 700 | |
| 701 | add_shortcode('wp_caption', 'img_caption_shortcode'); |
| 702 | add_shortcode('caption', 'img_caption_shortcode'); |
| 703 | |
| 704 | /** |
| 705 | * The Caption shortcode. |
| 706 | * |
| 707 | * Allows a plugin to replace the content that would otherwise be returned. The |
| 708 | * filter is 'img_caption_shortcode' and passes an empty string, the attr |
| 709 | * parameter and the content parameter values. |
| 710 | * |
| 711 | * The supported attributes for the shortcode are 'id', 'align', 'width', and |
| 712 | * 'caption'. |
| 713 | * |
| 714 | * @since 2.6.0 |
| 715 | * |
| 716 | * @param array $attr Attributes attributed to the shortcode. |
| 717 | * @param string $content Optional. Shortcode content. |
| 718 | * @return string |
| 719 | */ |
| 720 | function img_caption_shortcode($attr, $content = null) { |
| 721 | |
| 722 | // Allow plugins/themes to override the default caption template. |
| 723 | $output = apply_filters('img_caption_shortcode', '', $attr, $content); |
| 724 | if ( $output != '' ) |
| 725 | return $output; |
| 726 | |
| 727 | extract(shortcode_atts(array( |
| 728 | 'id' => '', |
| 729 | 'align' => 'alignnone', |
| 730 | 'width' => '', |
| 731 | 'caption' => '' |
| 732 | ), $attr)); |
| 733 | |
| 734 | if ( 1 > (int) $width || empty($caption) ) |
| 735 | return $content; |
| 736 | |
| 737 | if ( $id ) $id = 'id="' . esc_attr($id) . '" '; |
| 738 | |
| 739 | return '<div ' . $id . 'class="wp-caption ' . esc_attr($align) . '" style="width: ' . (10 + (int) $width) . 'px">' |
| 740 | . do_shortcode( $content ) . '<p class="wp-caption-text">' . $caption . '</p></div>'; |
| 741 | } |
| 742 | |
| 743 | add_shortcode('gallery', 'gallery_shortcode'); |
| 744 | |
| 745 | /** |
| 746 | * The Gallery shortcode. |
| 747 | * |
| 748 | * This implements the functionality of the Gallery Shortcode for displaying |
| 749 | * WordPress images on a post. |
| 750 | * |
| 751 | * @since 2.5.0 |
| 752 | * |
| 753 | * @param array $attr Attributes attributed to the shortcode. |
| 754 | * @return string HTML content to display gallery. |
| 755 | */ |
| 756 | function gallery_shortcode($attr) { |
| 757 | global $post, $wp_locale; |
| 758 | |
| 759 | static $instance = 0; |
| 760 | $instance++; |
| 761 | |
| 762 | // Allow plugins/themes to override the default gallery template. |
| 763 | $output = apply_filters('post_gallery', '', $attr); |
| 764 | if ( $output != '' ) |
| 765 | return $output; |
| 766 | |
| 767 | // We're trusting author input, so let's at least make sure it looks like a valid orderby statement |
| 768 | if ( isset( $attr['orderby'] ) ) { |
| 769 | $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] ); |
| 770 | if ( !$attr['orderby'] ) |
| 771 | unset( $attr['orderby'] ); |
| 772 | } |
| 773 | |
| 774 | extract(shortcode_atts(array( |
| 775 | 'order' => 'ASC', |
| 776 | 'orderby' => 'menu_order ID', |
| 777 | 'id' => $post->ID, |
| 778 | 'itemtag' => 'dl', |
| 779 | 'icontag' => 'dt', |
| 780 | 'captiontag' => 'dd', |
| 781 | 'columns' => 3, |
| 782 | 'size' => 'thumbnail', |
| 783 | 'include' => '', |
| 784 | 'exclude' => '' |
| 785 | ), $attr)); |
| 786 | |
| 787 | $id = intval($id); |
| 788 | if ( 'RAND' == $order ) |
| 789 | $orderby = 'none'; |
| 790 | |
| 791 | if ( !empty($include) ) { |
| 792 | $include = preg_replace( '/[^0-9,]+/', '', $include ); | //Arbitrary code inclusion
|
| 793 | $_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); | //Arbitrary code inclusion
|
| 794 | |
| 795 | $attachments = array(); |
| 796 | foreach ( $_attachments as $key => $val ) { |
| 797 | $attachments[$val->ID] = $_attachments[$key]; |
| 798 | } |
| 799 | } elseif ( !empty($exclude) ) { |
| 800 | $exclude = preg_replace( '/[^0-9,]+/', '', $exclude ); |
| 801 | $attachments = get_children( array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); |
| 802 | } else { |
| 803 | $attachments = get_children( array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); |
| 804 | } |
| 805 | |
| 806 | if ( empty($attachments) ) |
| 807 | return ''; |
| 808 | |
| 809 | if ( is_feed() ) { |
| 810 | $output = "\n"; |
| 811 | foreach ( $attachments as $att_id => $attachment ) |
| 812 | $output .= wp_get_attachment_link($att_id, $size, true) . "\n"; |
| 813 | return $output; |
| 814 | } |
| 815 | |
| 816 | $itemtag = tag_escape($itemtag); |
| 817 | $captiontag = tag_escape($captiontag); |
| 818 | $columns = intval($columns); |
| 819 | $itemwidth = $columns > 0 ? floor(100/$columns) : 100; |
| 820 | $float = is_rtl() ? 'right' : 'left'; |
| 821 | |
| 822 | $selector = "gallery-{$instance}"; |
| 823 | |
| 824 | $output = apply_filters('gallery_style', " |
| 825 | <style type='text/css'> |
| 826 | #{$selector} { |
| 827 | margin: auto; |
| 828 | } |
| 829 | #{$selector} .gallery-item { |
| 830 | float: {$float}; |
| 831 | margin-top: 10px; |
| 832 | text-align: center; |
| 833 | width: {$itemwidth}%; } |
| 834 | #{$selector} img { |
| 835 | border: 2px solid #cfcfcf; |
| 836 | } |
| 837 | #{$selector} .gallery-caption { |
| 838 | margin-left: 0; |
| 839 | } |
| 840 | </style> |
| 841 | <!-- see gallery_shortcode() in wp-includes/media.php --> |
| 842 | <div id='$selector' class='gallery galleryid-{$id}'>"); |
| 843 | |
| 844 | $i = 0; |
| 845 | foreach ( $attachments as $id => $attachment ) { |
| 846 | $link = isset($attr['link']) && 'file' == $attr['link'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false); | //Arbitrary file disclosing
|
| 847 | |
| 848 | $output .= "<{$itemtag} class='gallery-item'>"; |
| 849 | $output .= " |
| 850 | <{$icontag} class='gallery-icon'> |
| 851 | $link |
| 852 | </{$icontag}>"; |
| 853 | if ( $captiontag && trim($attachment->post_excerpt) ) { |
| 854 | $output .= " |
| 855 | <{$captiontag} class='gallery-caption'> |
| 856 | " . wptexturize($attachment->post_excerpt) . " |
| 857 | </{$captiontag}>"; |
| 858 | } |
| 859 | $output .= "</{$itemtag}>"; |
| 860 | if ( $columns > 0 && ++$i % $columns == 0 ) |
| 861 | $output .= '<br style="clear: both" />'; |
| 862 | } |
| 863 | |
| 864 | $output .= " |
| 865 | <br style='clear: both;' /> |
| 866 | </div>\n"; |
| 867 | |
| 868 | return $output; |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * Display previous image link that has the same post parent. |
| 873 | * |
| 874 | * @since 2.5.0 |
| 875 | * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text; |
| 876 | * @param string $text Optional, default is false. If included, link will reflect $text variable. |
| 877 | * @return string HTML content. |
| 878 | */ |
| 879 | function previous_image_link($size = 'thumbnail', $text = false) { |
| 880 | adjacent_image_link(true, $size, $text); |
| 881 | } |
| 882 | |
| 883 | /** |
| 884 | * Display next image link that has the same post parent. |
| 885 | * |
| 886 | * @since 2.5.0 |
| 887 | * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text; |
| 888 | * @param string $text Optional, default is false. If included, link will reflect $text variable. |
| 889 | * @return string HTML content. |
| 890 | */ |
| 891 | function next_image_link($size = 'thumbnail', $text = false) { |
| 892 | adjacent_image_link(false, $size, $text); |
| 893 | } |
| 894 | |
| 895 | /** |
| 896 | * Display next or previous image link that has the same post parent. |
| 897 | * |
| 898 | * Retrieves the current attachment object from the $post global. |
| 899 | * |
| 900 | * @since 2.5.0 |
| 901 | * |
| 902 | * @param bool $prev Optional. Default is true to display previous link, true for next. |
| 903 | */ |
| 904 | function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) { |
| 905 | global $post; |
| 906 | $post = get_post($post); |
| 907 | $attachments = array_values(get_children( array('post_parent' => $post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') )); |
| 908 | |
| 909 | foreach ( $attachments as $k => $attachment ) |
| 910 | if ( $attachment->ID == $post->ID ) |
| 911 | break; |
| 912 | |
| 913 | $k = $prev ? $k - 1 : $k + 1; |
| 914 | |
| 915 | if ( isset($attachments[$k]) ) |
| 916 | echo wp_get_attachment_link($attachments[$k]->ID, $size, true, false, $text); |
| 917 | } |
| 918 | |
| 919 | /** |
| 920 | * Retrieve taxonomies attached to the attachment. |
| 921 | * |
| 922 | * @since 2.5.0 |
| 923 | * |
| 924 | * @param int|array|object $attachment Attachment ID, Attachment data array, or Attachment data object. |
| 925 | * @return array Empty array on failure. List of taxonomies on success. |
| 926 | */ |
| 927 | function get_attachment_taxonomies($attachment) { |
| 928 | if ( is_int( $attachment ) ) |
| 929 | $attachment = get_post($attachment); |
| 930 | else if ( is_array($attachment) ) |
| 931 | $attachment = (object) $attachment; |
| 932 | |
| 933 | if ( ! is_object($attachment) ) |
| 934 | return array(); |
| 935 | |
| 936 | $filename = basename($attachment->guid); |
| 937 | |
| 938 | $objects = array('attachment'); |
| 939 | |
| 940 | if ( false !== strpos($filename, '.') ) |
| 941 | $objects[] = 'attachment:' . substr($filename, strrpos($filename, '.') + 1); |
| 942 | if ( !empty($attachment->post_mime_type) ) { |
| 943 | $objects[] = 'attachment:' . $attachment->post_mime_type; |
| 944 | if ( false !== strpos($attachment->post_mime_type, '/') ) |
| 945 | foreach ( explode('/', $attachment->post_mime_type) as $token ) |
| 946 | if ( !empty($token) ) |
| 947 | $objects[] = "attachment:$token"; |
| 948 | } |
| 949 | |
| 950 | $taxonomies = array(); |
| 951 | foreach ( $objects as $object ) |
| 952 | if ( $taxes = get_object_taxonomies($object) ) |
| 953 | $taxonomies = array_merge($taxonomies, $taxes); |
| 954 | |
| 955 | return array_unique($taxonomies); |
| 956 | } |
| 957 | |
| 958 | /** |
| 959 | * Check if the installed version of GD supports particular image type |
| 960 | * |
| 961 | * @since 2.9.0 |
| 962 | * |
| 963 | * @param $mime_type string |
| 964 | * @return bool |
| 965 | */ |
| 966 | function gd_edit_image_support($mime_type) { |
| 967 | if ( function_exists('imagetypes') ) { |
| 968 | switch( $mime_type ) { |
| 969 | case 'image/jpeg': |
| 970 | return (imagetypes() & IMG_JPG) != 0; |
| 971 | case 'image/png': |
| 972 | return (imagetypes() & IMG_PNG) != 0; |
| 973 | case 'image/gif': |
| 974 | return (imagetypes() & IMG_GIF) != 0; |
| 975 | } |
| 976 | } else { |
| 977 | switch( $mime_type ) { |
| 978 | case 'image/jpeg': |
| 979 | return function_exists('imagecreatefromjpeg'); |
| 980 | case 'image/png': |
| 981 | return function_exists('imagecreatefrompng'); |
| 982 | case 'image/gif': |
| 983 | return function_exists('imagecreatefromgif'); |
| 984 | } |
| 985 | } |
| 986 | return false; |
| 987 | } |
| 988 | |
| 989 | /** |
| 990 | * Create new GD image resource with transparency support |
| 991 | * |
| 992 | * @since 2.9.0 |
| 993 | * |
| 994 | * @param $width |
| 995 | * @param $height |
| 996 | * @return image resource |
| 997 | */ |
| 998 | function wp_imagecreatetruecolor($width, $height) { |
| 999 | $img = imagecreatetruecolor($width, $height); |
| 1000 | if ( is_resource($img) && function_exists('imagealphablending') && function_exists('imagesavealpha') ) { |