webp-uploads
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| 1 | <?php |
| 2 | /** |
| 3 | * Helper functions used for Modern Image Formats. |
| 4 | * |
| 5 | * @package webp-uploads |
| 6 | * |
| 7 | * @since 1.0.0 |
| 8 | */ |
| 9 | |
| 10 | if ( ! defined( 'ABSPATH' ) ) { |
| 11 | exit; // Exit if accessed directly. |
| 12 | } |
| 13 | |
| 14 | /** |
| 15 | * Returns an array with the list of valid mime types that a specific mime type can be converted into it, |
| 16 | * for example an image/jpeg can be converted into an image/webp. |
| 17 | * |
| 18 | * @since 1.0.0 |
| 19 | * @since 2.0.0 Added support for AVIF. |
| 20 | * @since 2.2.0 Added support for PNG. |
| 21 | * |
| 22 | * @return array<string, array<string>> An array of valid mime types, where the key is the mime type and the value is the extension type. |
| 23 | */ |
| 24 | function webp_uploads_get_upload_image_mime_transforms(): array { |
| 25 | |
| 26 | // Check the selected output format. |
| 27 | $output_format = webp_uploads_mime_type_supported( 'image/avif' ) ? webp_uploads_get_image_output_format() : 'webp'; |
| 28 | |
| 29 | $default_transforms = array( |
| 30 | 'image/jpeg' => array( 'image/' . $output_format ), |
| 31 | 'image/webp' => array( 'image/webp' ), |
| 32 | 'image/avif' => array( 'image/avif' ), |
| 33 | 'image/png' => array( 'image/' . $output_format ), |
| 34 | ); |
| 35 | |
| 36 | // Check setting for whether to generate both JPEG and the modern output format. |
| 37 | if ( webp_uploads_is_fallback_enabled() ) { |
| 38 | $default_transforms = array( |
| 39 | 'image/jpeg' => array( 'image/jpeg', 'image/' . $output_format ), |
| 40 | 'image/png' => array( 'image/png', 'image/' . $output_format ), |
| 41 | 'image/' . $output_format => array( 'image/' . $output_format, 'image/jpeg' ), |
| 42 | ); |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Filter to allow the definition of a custom mime types, in which a defined mime type |
| 47 | * can be transformed and provide a wide range of mime types. |
| 48 | * |
| 49 | * The order of supported mime types matters. If the original mime type of the uploaded image |
| 50 | * is not needed, then the first mime type in the list supported by the image editor will be |
| 51 | * selected for the default subsizes. |
| 52 | * |
| 53 | * @since 1.0.0 |
| 54 | * |
| 55 | * @param array $default_transforms A map with the valid mime transforms. |
| 56 | */ |
| 57 | $transforms = apply_filters( 'webp_uploads_upload_image_mime_transforms', $default_transforms ); |
| 58 | |
| 59 | // Return the default mime transforms if a non-array result is returned from the filter. |
| 60 | if ( ! is_array( $transforms ) ) { |
| 61 | return $default_transforms; |
| 62 | } |
| 63 | |
| 64 | // Ensure that all mime types have correct transforms. If a mime type has invalid transforms array, |
| 65 | // then fallback to the original mime type to make sure that the correct subsizes are created. |
| 66 | foreach ( $transforms as $mime_type => $transform_types ) { |
| 67 | if ( ! is_array( $transform_types ) || empty( $transform_types ) ) { |
| 68 | $transforms[ $mime_type ] = array( $mime_type ); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return $transforms; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Creates a resized image with the provided dimensions out of an original attachment, the created image |
| 77 | * would be saved in the specified mime and stored in the destination file. If the image can't be saved correctly |
| 78 | * a WP_Error would be returned otherwise an array with the file and filesize properties. |
| 79 | * |
| 80 | * @since 1.0.0 |
| 81 | * @access private |
| 82 | * |
| 83 | * @param int $attachment_id The ID of the attachment from where this image would be created. |
| 84 | * @param string $image_size The size name that would be used to create the image source, out of the registered subsizes. |
| 85 | * @param array{ width: int, height: int, crop: bool } $size_data An array with the dimensions of the image: height, width and crop. |
| 86 | * @param string $mime The target mime in which the image should be created. |
| 87 | * @param string|null $destination_file_name The path where the file would be stored, including the extension. If null, `generate_filename` is used to create the destination file name. |
| 88 | * |
| 89 | * @return array{ file: string, filesize: int }|WP_Error An array with the file and filesize if the image was created correctly, otherwise a WP_Error. |
| 90 | */ |
| 91 | function webp_uploads_generate_additional_image_source( int $attachment_id, string $image_size, array $size_data, string $mime, ?string $destination_file_name = null ) { |
| 92 | /** |
| 93 | * Filter to allow the generation of additional image sources, in which a defined mime type |
| 94 | * can be transformed and create additional mime types for the file. |
| 95 | * |
| 96 | * Returning an image data array or WP_Error here effectively short-circuits the default logic to generate the image source. |
| 97 | * |
| 98 | * @since 1.1.0 |
| 99 | * |
| 100 | * @param array{ |
| 101 | * file: string, |
| 102 | * path?: string, |
| 103 | * filesize?: int |
| 104 | * }|null|WP_Error $image Image data, null, or WP_Error. |
| 105 | * @param int $attachment_id The ID of the attachment from where this image would be created. |
| 106 | * @param string $image_size The size name that would be used to create this image, out of the registered subsizes. |
| 107 | * @param array{ |
| 108 | * width: int, |
| 109 | * height: int, |
| 110 | * crop: bool |
| 111 | * } $size_data An array with the dimensions of the image. |
| 112 | * @param string $mime The target mime in which the image should be created. |
| 113 | */ |
| 114 | $image = apply_filters( 'webp_uploads_pre_generate_additional_image_source', null, $attachment_id, $image_size, $size_data, $mime ); |
| 115 | if ( is_wp_error( $image ) ) { |
| 116 | return $image; |
| 117 | } |
| 118 | if ( is_array( $image ) && array_key_exists( 'file', $image ) && is_string( $image['file'] ) ) { |
| 119 | // The filtered image provided all we need to short-circuit here. |
| 120 | if ( array_key_exists( 'filesize', $image ) && is_int( $image['filesize'] ) && $image['filesize'] > 0 ) { |
| 121 | return $image; |
| 122 | } |
| 123 | |
| 124 | // Supply the filesize based on the filter-provided path. |
| 125 | if ( array_key_exists( 'path', $image ) && is_int( $image['path'] ) ) { |
| 126 | $filesize = wp_filesize( $image['path'] ); |
| 127 | if ( $filesize > 0 ) { |
| 128 | return array( |
| 129 | 'file' => $image['file'], |
| 130 | 'filesize' => $filesize, |
| 131 | ); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | $allowed_mimes = array_flip( wp_get_mime_types() ); |
| 137 | if ( ! isset( $allowed_mimes[ $mime ] ) || ! is_string( $allowed_mimes[ $mime ] ) ) { |
| 138 | return new WP_Error( 'image_mime_type_invalid', __( 'The provided mime type is not allowed.', 'webp-uploads' ) ); |
| 139 | } |
| 140 | |
| 141 | if ( ! wp_image_editor_supports( array( 'mime_type' => $mime ) ) ) { |
| 142 | return new WP_Error( 'image_mime_type_not_supported', __( 'The provided mime type is not supported.', 'webp-uploads' ) ); |
| 143 | } |
| 144 | |
| 145 | $image_path = wp_get_original_image_path( $attachment_id ); |
| 146 | if ( false === $image_path || ! file_exists( $image_path ) ) { |
| 147 | return new WP_Error( 'original_image_file_not_found', __( 'The original image file does not exists, subsizes are created out of the original image.', 'webp-uploads' ) ); |
| 148 | } |
| 149 | |
| 150 | $editor = wp_get_image_editor( $image_path, array( 'mime_type' => $mime ) ); |
| 151 | if ( is_wp_error( $editor ) ) { |
| 152 | return $editor; |
| 153 | } |
| 154 | |
| 155 | $height = isset( $size_data['height'] ) ? (int) $size_data['height'] : 0; |
| 156 | $width = isset( $size_data['width'] ) ? (int) $size_data['width'] : 0; |
| 157 | $crop = isset( $size_data['crop'] ) && $size_data['crop']; |
| 158 | if ( $width <= 0 && $height <= 0 ) { |
| 159 | return new WP_Error( 'image_wrong_dimensions', __( 'At least one of the dimensions must be a positive number.', 'webp-uploads' ) ); |
| 160 | } |
| 161 | |
| 162 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 163 | // If stored EXIF data exists, rotate the source image before creating sub-sizes. |
| 164 | if ( ! empty( $image_meta['image_meta'] ) ) { |
| 165 | $editor->maybe_exif_rotate(); |
| 166 | } |
| 167 | |
| 168 | $editor->resize( $width, $height, $crop ); |
| 169 | |
| 170 | if ( null === $destination_file_name ) { |
| 171 | $ext = pathinfo( $image_path, PATHINFO_EXTENSION ); |
| 172 | $suffix = $editor->get_suffix(); |
| 173 | $suffix .= "-{$ext}"; |
| 174 | $extension = explode( '|', $allowed_mimes[ $mime ] ); |
| 175 | $destination_file_name = $editor->generate_filename( $suffix, null, $extension[0] ); |
| 176 | } |
| 177 | |
| 178 | remove_filter( 'image_editor_output_format', 'webp_uploads_filter_image_editor_output_format', 10 ); |
| 179 | $image = $editor->save( $destination_file_name, $mime ); |
| 180 | add_filter( 'image_editor_output_format', 'webp_uploads_filter_image_editor_output_format', 10, 3 ); |
| 181 | |
| 182 | if ( is_wp_error( $image ) ) { |
| 183 | return $image; |
| 184 | } |
| 185 | |
| 186 | if ( empty( $image['file'] ) ) { |
| 187 | return new WP_Error( 'image_file_not_present', __( 'The file key is not present on the image data', 'webp-uploads' ) ); |
| 188 | } |
| 189 | |
| 190 | return array( |
| 191 | 'file' => $image['file'], |
| 192 | 'filesize' => isset( $image['path'] ) ? wp_filesize( $image['path'] ) : 0, |
| 193 | ); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * Creates a new image based of the specified attachment with a defined mime type |
| 198 | * this image would be stored in the same place as the provided size name inside the |
| 199 | * metadata of the attachment. |
| 200 | * |
| 201 | * @since 1.0.0 |
| 202 | * |
| 203 | * @see wp_create_image_subsizes() |
| 204 | * |
| 205 | * @param int $attachment_id The ID of the attachment we are going to use as a reference to create the image. |
| 206 | * @param string $size The size name that would be used to create this image, out of the registered subsizes. |
| 207 | * @param string $mime A mime type we are looking to use to create this image. |
| 208 | * |
| 209 | * @return array{ file: string, filesize: int }|WP_Error |
| 210 | */ |
| 211 | function webp_uploads_generate_image_size( int $attachment_id, string $size, string $mime ) { |
| 212 | $sizes = wp_get_registered_image_subsizes(); |
| 213 | $metadata = wp_get_attachment_metadata( $attachment_id ); |
| 214 | |
| 215 | if ( |
| 216 | ! isset( $metadata['sizes'][ $size ], $sizes[ $size ] ) |
| 217 | || ! is_array( $metadata['sizes'][ $size ] ) |
| 218 | || ! is_array( $sizes[ $size ] ) |
| 219 | ) { |
| 220 | return new WP_Error( 'image_mime_type_invalid_metadata', __( 'The image does not have a valid metadata.', 'webp-uploads' ) ); |
| 221 | } |
| 222 | |
| 223 | $size_data = array( |
| 224 | 'width' => 0, |
| 225 | 'height' => 0, |
| 226 | 'crop' => false, |
| 227 | ); |
| 228 | |
| 229 | if ( isset( $sizes[ $size ]['width'] ) ) { |
| 230 | $size_data['width'] = $sizes[ $size ]['width']; |
| 231 | } elseif ( isset( $metadata['sizes'][ $size ]['width'] ) ) { |
| 232 | $size_data['width'] = $metadata['sizes'][ $size ]['width']; |
| 233 | } |
| 234 | |
| 235 | if ( isset( $sizes[ $size ]['height'] ) ) { |
| 236 | $size_data['height'] = $sizes[ $size ]['height']; |
| 237 | } elseif ( isset( $metadata['sizes'][ $size ]['height'] ) ) { |
| 238 | $size_data['height'] = $metadata['sizes'][ $size ]['height']; |
| 239 | } |
| 240 | |
| 241 | if ( isset( $sizes[ $size ]['crop'] ) ) { |
| 242 | $size_data['crop'] = (bool) $sizes[ $size ]['crop']; |
| 243 | } |
| 244 | |
| 245 | return webp_uploads_generate_additional_image_source( $attachment_id, $size, $size_data, $mime ); |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Returns mime types that should be used for an image in the specific context. |
| 250 | * |
| 251 | * @since 1.0.0 |
| 252 | * |
| 253 | * @param int $attachment_id The attachment ID. |
| 254 | * @param string $context The current context. |
| 255 | * @return string[] Mime types to use for the image. |
| 256 | */ |
| 257 | function webp_uploads_get_content_image_mimes( int $attachment_id, string $context ): array { |
| 258 | $target_mimes = array( 'image/' . webp_uploads_get_image_output_format(), 'image/jpeg' ); |
| 259 | |
| 260 | /** |
| 261 | * Filters mime types that should be used to update all images in the content. The order of |
| 262 | * mime types matters. The first mime type in the list will be used if it is supported by an image. |
| 263 | * |
| 264 | * @since 1.0.0 |
| 265 | * |
| 266 | * @param array $target_mimes The list of mime types that can be used to update images in the content. |
| 267 | * @param int $attachment_id The attachment ID. |
| 268 | * @param string $context The current context. |
| 269 | */ |
| 270 | $target_mimes = apply_filters( 'webp_uploads_content_image_mimes', $target_mimes, $attachment_id, $context ); |
| 271 | if ( ! is_array( $target_mimes ) ) { |
| 272 | $target_mimes = array(); |
| 273 | } |
| 274 | |
| 275 | return $target_mimes; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Verifies if the request is for a frontend context within the <body> tag. |
| 280 | * |
| 281 | * @since 1.0.0 |
| 282 | * |
| 283 | * @global WP_Query $wp_query WordPress Query object. |
| 284 | * |
| 285 | * @return bool True if in the <body> within a frontend request, false otherwise. |
| 286 | */ |
| 287 | function webp_uploads_in_frontend_body(): bool { |
| 288 | global $wp_query; |
| 289 | |
| 290 | // Check if this request is generally outside (or before) any frontend context. |
| 291 | if ( ! isset( $wp_query ) || defined( 'REST_REQUEST' ) || defined( 'XMLRPC_REQUEST' ) || is_feed() ) { |
| 292 | return false; |
| 293 | } |
| 294 | |
| 295 | // Check if we're anywhere before 'template_redirect' or within the 'wp_head' action. |
| 296 | if ( 0 === did_action( 'template_redirect' ) || doing_action( 'wp_head' ) ) { |
| 297 | return false; |
| 298 | } |
| 299 | |
| 300 | return true; |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * Check whether the additional image is larger than the original image. |
| 305 | * |
| 306 | * @since 1.0.0 |
| 307 | * |
| 308 | * @param array{ filesize?: int } $original An array with the metadata of the attachment. |
| 309 | * @param array{ filesize?: int } $additional An array containing the filename and file size for additional mime. |
| 310 | * @return bool True if the additional image is larger than the original image, otherwise false. |
| 311 | */ |
| 312 | function webp_uploads_should_discard_additional_image_file( array $original, array $additional ): bool { |
| 313 | $original_image_filesize = isset( $original['filesize'] ) ? (int) $original['filesize'] : 0; |
| 314 | $additional_image_filesize = isset( $additional['filesize'] ) ? (int) $additional['filesize'] : 0; |
| 315 | if ( $original_image_filesize > 0 && $additional_image_filesize > 0 ) { |
| 316 | /** |
| 317 | * Filter whether WebP images that are larger than the matching JPEG should be discarded. |
| 318 | * |
| 319 | * By default the performance lab plugin will use the mime type with the smaller filesize |
| 320 | * rather than defaulting to `webp`. |
| 321 | * |
| 322 | * @since 1.0.0 |
| 323 | * |
| 324 | * @param bool $preferred_filesize Prioritize file size over mime type. Default true. |
| 325 | */ |
| 326 | $webp_discard_larger_images = apply_filters( 'webp_uploads_discard_larger_generated_images', true ); |
| 327 | |
| 328 | if ( $webp_discard_larger_images && $additional_image_filesize >= $original_image_filesize ) { |
| 329 | return true; |
| 330 | } |
| 331 | } |
| 332 | return false; |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Checks if a mime type is supported by the server. |
| 337 | * |
| 338 | * Includes special handling for false positives on AVIF support. |
| 339 | * |
| 340 | * @since 2.0.0 |
| 341 | * |
| 342 | * @param string $mime_type The mime type to check. |
| 343 | * @return bool Whether the server supports a given mime type. |
| 344 | */ |
| 345 | function webp_uploads_mime_type_supported( string $mime_type ): bool { |
| 346 | if ( ! wp_image_editor_supports( array( 'mime_type' => $mime_type ) ) ) { |
| 347 | return false; |
| 348 | } |
| 349 | |
| 350 | // In certain server environments Image editors can report a false positive for AVIF support. |
| 351 | if ( 'image/avif' === $mime_type ) { |
| 352 | $editor = _wp_image_editor_choose( array( 'mime_type' => 'image/avif' ) ); |
| 353 | if ( false === $editor ) { |
| 354 | return false; |
| 355 | } |
| 356 | if ( is_a( $editor, WP_Image_Editor_GD::class, true ) ) { |
| 357 | return function_exists( 'imageavif' ); |
| 358 | } |
| 359 | if ( is_a( $editor, WP_Image_Editor_Imagick::class, true ) && class_exists( 'Imagick' ) ) { |
| 360 | return 0 !== count( Imagick::queryFormats( 'AVIF' ) ); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | return true; |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * Get the image output format setting from the option. Default is avif. |
| 369 | * |
| 370 | * @since 2.0.0 |
| 371 | * |
| 372 | * @return string The image output format. One of 'webp' or 'avif'. |
| 373 | */ |
| 374 | function webp_uploads_get_image_output_format(): string { |
| 375 | $image_format = get_option( 'perflab_modern_image_format' ); |
| 376 | return webp_uploads_sanitize_image_format( $image_format ); |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Sanitizes the image format. |
| 381 | * |
| 382 | * @since 2.0.0 |
| 383 | * |
| 384 | * @param string|mixed $image_format The image format to check. |
| 385 | * @return string Supported image format. |
| 386 | */ |
| 387 | function webp_uploads_sanitize_image_format( $image_format ): string { |
| 388 | return in_array( $image_format, array( 'webp', 'avif' ), true ) ? $image_format : 'webp'; |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Checks if the `webp_uploads_use_picture_element` option is enabled. |
| 393 | * |
| 394 | * @since 2.0.0 |
| 395 | * |
| 396 | * @return bool True if the option is enabled, false otherwise. |
| 397 | */ |
| 398 | function webp_uploads_is_picture_element_enabled(): bool { |
| 399 | return webp_uploads_is_fallback_enabled() && (bool) get_option( 'webp_uploads_use_picture_element', false ); |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * Checks if the `perflab_generate_webp_and_jpeg` option is enabled. |
| 404 | * |
| 405 | * @since 2.0.0 |
| 406 | * @since 2.2.0 Renamed to webp_uploads_is_fallback_enabled(). |
| 407 | * |
| 408 | * @return bool True if the option is enabled, false otherwise. |
| 409 | */ |
| 410 | function webp_uploads_is_fallback_enabled(): bool { |
| 411 | return (bool) get_option( 'perflab_generate_webp_and_jpeg' ); |
| 412 | } |
| 413 | |
| 414 | /** |
| 415 | * Retrieves the image URL for a specified MIME type from the attachment metadata. |
| 416 | * |
| 417 | * This function attempts to locate an alternate image source URL in the |
| 418 | * attachment's metadata that matches the provided MIME type. |
| 419 | * |
| 420 | * @since 2.2.0 |
| 421 | * |
| 422 | * @param int $attachment_id The ID of the attachment. |
| 423 | * @param string $src The original image src url. |
| 424 | * @param string $mime A mime type we are looking to get image url. |
| 425 | * @return string|null Returns mime type image if available. |
| 426 | */ |
| 427 | function webp_uploads_get_mime_type_image( int $attachment_id, string $src, string $mime ): ?string { |
| 428 | $metadata = wp_get_attachment_metadata( $attachment_id ); |
| 429 | $src_basename = wp_basename( $src ); |
| 430 | if ( isset( $metadata['sources'][ $mime ]['file'] ) ) { |
| 431 | $basename = wp_basename( $metadata['file'] ); |
| 432 | |
| 433 | if ( $src_basename === $basename ) { |
| 434 | return str_replace( |
| 435 | $basename, |
| 436 | $metadata['sources'][ $mime ]['file'], |
| 437 | $src |
| 438 | ); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | if ( isset( $metadata['sizes'] ) && is_array( $metadata['sizes'] ) ) { |
| 443 | foreach ( $metadata['sizes'] as $size => $size_data ) { |
| 444 | |
| 445 | if ( ! isset( $size_data['file'] ) ) { |
| 446 | continue; |
| 447 | } |
| 448 | |
| 449 | if ( ! isset( $size_data['sources'][ $mime ]['file'] ) ) { |
| 450 | continue; |
| 451 | } |
| 452 | |
| 453 | if ( $size_data['file'] === $size_data['sources'][ $mime ]['file'] ) { |
| 454 | continue; |
| 455 | } |
| 456 | |
| 457 | if ( $src_basename !== $size_data['file'] ) { |
| 458 | continue; |
| 459 | } |
| 460 | |
| 461 | return str_replace( |
| 462 | $size_data['file'], |
| 463 | $size_data['sources'][ $mime ]['file'], |
| 464 | $src |
| 465 | ); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | return null; |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * Retrieves the MIME type of an attachment file, checking the file directly if possible. |
| 474 | * |
| 475 | * If checking the file directly fails, the function falls back to the attachment's MIME type. |
| 476 | * |
| 477 | * @since 2.3.0 |
| 478 | * |
| 479 | * @param int $attachment_id The attachment ID. |
| 480 | * @param string $file Optional. The path to the file. |
| 481 | * @return string The MIME type of the file, or an empty string if not found. |
| 482 | */ |
| 483 | function webp_uploads_get_attachment_file_mime_type( int $attachment_id, string $file = '' ): string { |
| 484 | if ( '' === $file ) { |
| 485 | $file = get_attached_file( $attachment_id, true ); |
| 486 | // File does not exist. |
| 487 | if ( false === $file ) { |
| 488 | return ''; |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * We need to get the MIME type ideally from the file, as WordPress Core may have already altered it. |
| 494 | * The post MIME type is typically not updated during that process. |
| 495 | */ |
| 496 | $filetype = wp_check_filetype( $file ); |
| 497 | $mime_type = $filetype['type'] ?? get_post_mime_type( $attachment_id ); |
| 498 | return is_string( $mime_type ) ? $mime_type : ''; |
| 499 | } |
| 500 |