webp-uploads
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| 1 | <?php |
| 2 | /** |
| 3 | * Helper functions used for WebP Uploads. |
| 4 | * |
| 5 | * @package webp-uploads |
| 6 | * @since 1.0.0 |
| 7 | */ |
| 8 | |
| 9 | if ( ! defined( 'ABSPATH' ) ) { |
| 10 | exit; // Exit if accessed directly. |
| 11 | } |
| 12 | |
| 13 | /** |
| 14 | * Returns an array with the list of valid mime types that a specific mime type can be converted into it, |
| 15 | * for example an image/jpeg can be converted into an image/webp. |
| 16 | * |
| 17 | * @since 1.0.0 |
| 18 | * |
| 19 | * @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. |
| 20 | */ |
| 21 | function webp_uploads_get_upload_image_mime_transforms() { |
| 22 | $default_transforms = array( |
| 23 | 'image/jpeg' => array( 'image/webp' ), |
| 24 | 'image/webp' => array( 'image/webp' ), |
| 25 | ); |
| 26 | |
| 27 | // Check setting for whether to generate both JPEG and WebP. |
| 28 | if ( true === (bool) get_option( 'perflab_generate_webp_and_jpeg' ) ) { |
| 29 | $default_transforms = array( |
| 30 | 'image/jpeg' => array( 'image/jpeg', 'image/webp' ), |
| 31 | 'image/webp' => array( 'image/webp', 'image/jpeg' ), |
| 32 | ); |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Filter to allow the definition of a custom mime types, in which a defined mime type |
| 37 | * can be transformed and provide a wide range of mime types. |
| 38 | * |
| 39 | * The order of supported mime types matters. If the original mime type of the uploaded image |
| 40 | * is not needed, then the first mime type in the list supported by the image editor will be |
| 41 | * selected for the default subsizes. |
| 42 | * |
| 43 | * @since 1.0.0 |
| 44 | * |
| 45 | * @param array $default_transforms A map with the valid mime transforms. |
| 46 | */ |
| 47 | $transforms = apply_filters( 'webp_uploads_upload_image_mime_transforms', $default_transforms ); |
| 48 | |
| 49 | // Return the default mime transforms if a non-array result is returned from the filter. |
| 50 | if ( ! is_array( $transforms ) ) { |
| 51 | return $default_transforms; |
| 52 | } |
| 53 | |
| 54 | // Ensure that all mime types have correct transforms. If a mime type has invalid transforms array, |
| 55 | // then fallback to the original mime type to make sure that the correct subsizes are created. |
| 56 | foreach ( $transforms as $mime_type => $transform_types ) { |
| 57 | if ( ! is_array( $transform_types ) || empty( $transform_types ) ) { |
| 58 | $transforms[ $mime_type ] = array( $mime_type ); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | return $transforms; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Creates a resized image with the provided dimensions out of an original attachment, the created image |
| 67 | * would be saved in the specified mime and stored in the destination file. If the image can't be saved correctly |
| 68 | * a WP_Error would be returned otherwise an array with the file and filesize properties. |
| 69 | * |
| 70 | * @since 1.0.0 |
| 71 | * @access private |
| 72 | * |
| 73 | * @param int $attachment_id The ID of the attachment from where this image would be created. |
| 74 | * @param string $image_size The size name that would be used to create the image source, out of the registered subsizes. |
| 75 | * @param array $size_data An array with the dimensions of the image: height, width and crop. |
| 76 | * @param string $mime The target mime in which the image should be created. |
| 77 | * @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. |
| 78 | * |
| 79 | * @return array|WP_Error An array with the file and filesize if the image was created correctly, otherwise a WP_Error. |
| 80 | */ |
| 81 | function webp_uploads_generate_additional_image_source( $attachment_id, $image_size, array $size_data, $mime, $destination_file_name = null ) { |
| 82 | /** |
| 83 | * Filter to allow the generation of additional image sources, in which a defined mime type |
| 84 | * can be transformed and create additional mime types for the file. |
| 85 | * |
| 86 | * Returning an image data array or WP_Error here effectively short-circuits the default logic to generate the image source. |
| 87 | * |
| 88 | * @since 1.1.0 |
| 89 | * |
| 90 | * @param array|null|WP_Error $image Image data {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} or null or WP_Error. |
| 91 | * @param int $attachment_id The ID of the attachment from where this image would be created. |
| 92 | * @param string $image_size The size name that would be used to create this image, out of the registered subsizes. |
| 93 | * @param array $size_data An array with the dimensions of the image: height, width and crop {'height'=>int, 'width'=>int, 'crop'}. |
| 94 | * @param string $mime The target mime in which the image should be created. |
| 95 | */ |
| 96 | $image = apply_filters( 'webp_uploads_pre_generate_additional_image_source', null, $attachment_id, $image_size, $size_data, $mime ); |
| 97 | if ( is_wp_error( $image ) ) { |
| 98 | return $image; |
| 99 | } |
| 100 | |
| 101 | if ( |
| 102 | is_array( $image ) && |
| 103 | ! empty( $image['file'] ) && |
| 104 | ( |
| 105 | ! empty( $image['path'] ) || |
| 106 | array_key_exists( 'filesize', $image ) |
| 107 | ) |
| 108 | ) { |
| 109 | return array( |
| 110 | 'file' => $image['file'], |
| 111 | 'filesize' => array_key_exists( 'filesize', $image ) |
| 112 | ? $image['filesize'] |
| 113 | : wp_filesize( $image['path'] ), |
| 114 | ); |
| 115 | } |
| 116 | |
| 117 | $allowed_mimes = array_flip( wp_get_mime_types() ); |
| 118 | if ( ! isset( $allowed_mimes[ $mime ] ) || ! is_string( $allowed_mimes[ $mime ] ) ) { |
| 119 | return new WP_Error( 'image_mime_type_invalid', __( 'The provided mime type is not allowed.', 'webp-uploads' ) ); |
| 120 | } |
| 121 | |
| 122 | if ( ! wp_image_editor_supports( array( 'mime_type' => $mime ) ) ) { |
| 123 | return new WP_Error( 'image_mime_type_not_supported', __( 'The provided mime type is not supported.', 'webp-uploads' ) ); |
| 124 | } |
| 125 | |
| 126 | $image_path = wp_get_original_image_path( $attachment_id ); |
| 127 | if ( ! file_exists( $image_path ) ) { |
| 128 | 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' ) ); |
| 129 | } |
| 130 | |
| 131 | $editor = wp_get_image_editor( $image_path, array( 'mime_type' => $mime ) ); |
| 132 | if ( is_wp_error( $editor ) ) { |
| 133 | return $editor; |
| 134 | } |
| 135 | |
| 136 | $height = isset( $size_data['height'] ) ? (int) $size_data['height'] : 0; |
| 137 | $width = isset( $size_data['width'] ) ? (int) $size_data['width'] : 0; |
| 138 | $crop = isset( $size_data['crop'] ) && $size_data['crop']; |
| 139 | if ( $width <= 0 && $height <= 0 ) { |
| 140 | return new WP_Error( 'image_wrong_dimensions', __( 'At least one of the dimensions must be a positive number.', 'webp-uploads' ) ); |
| 141 | } |
| 142 | |
| 143 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 144 | // If stored EXIF data exists, rotate the source image before creating sub-sizes. |
| 145 | if ( ! empty( $image_meta['image_meta'] ) ) { |
| 146 | $editor->maybe_exif_rotate(); |
| 147 | } |
| 148 | |
| 149 | $editor->resize( $width, $height, $crop ); |
| 150 | |
| 151 | if ( null === $destination_file_name ) { |
| 152 | $ext = pathinfo( $image_path, PATHINFO_EXTENSION ); |
| 153 | $suffix = $editor->get_suffix(); |
| 154 | $suffix .= "-{$ext}"; |
| 155 | $extension = explode( '|', $allowed_mimes[ $mime ] ); |
| 156 | $destination_file_name = $editor->generate_filename( $suffix, null, $extension[0] ); |
| 157 | } |
| 158 | |
| 159 | remove_filter( 'image_editor_output_format', 'webp_uploads_filter_image_editor_output_format', 10, 3 ); |
| 160 | $image = $editor->save( $destination_file_name, $mime ); |
| 161 | add_filter( 'image_editor_output_format', 'webp_uploads_filter_image_editor_output_format', 10, 3 ); |
| 162 | |
| 163 | if ( is_wp_error( $image ) ) { |
| 164 | return $image; |
| 165 | } |
| 166 | |
| 167 | if ( empty( $image['file'] ) ) { |
| 168 | return new WP_Error( 'image_file_not_present', __( 'The file key is not present on the image data', 'webp-uploads' ) ); |
| 169 | } |
| 170 | |
| 171 | return array( |
| 172 | 'file' => $image['file'], |
| 173 | 'filesize' => isset( $image['path'] ) ? wp_filesize( $image['path'] ) : 0, |
| 174 | ); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Creates a new image based of the specified attachment with a defined mime type |
| 179 | * this image would be stored in the same place as the provided size name inside the |
| 180 | * metadata of the attachment. |
| 181 | * |
| 182 | * @since 1.0.0 |
| 183 | * |
| 184 | * @see wp_create_image_subsizes() |
| 185 | * |
| 186 | * @param int $attachment_id The ID of the attachment we are going to use as a reference to create the image. |
| 187 | * @param string $size The size name that would be used to create this image, out of the registered subsizes. |
| 188 | * @param string $mime A mime type we are looking to use to create this image. |
| 189 | * |
| 190 | * @return array|WP_Error |
| 191 | */ |
| 192 | function webp_uploads_generate_image_size( $attachment_id, $size, $mime ) { |
| 193 | $sizes = wp_get_registered_image_subsizes(); |
| 194 | $metadata = wp_get_attachment_metadata( $attachment_id ); |
| 195 | |
| 196 | if ( |
| 197 | ! isset( $metadata['sizes'][ $size ], $sizes[ $size ] ) |
| 198 | || ! is_array( $metadata['sizes'][ $size ] ) |
| 199 | || ! is_array( $sizes[ $size ] ) |
| 200 | ) { |
| 201 | return new WP_Error( 'image_mime_type_invalid_metadata', __( 'The image does not have a valid metadata.', 'webp-uploads' ) ); |
| 202 | } |
| 203 | |
| 204 | $size_data = array( |
| 205 | 'width' => 0, |
| 206 | 'height' => 0, |
| 207 | 'crop' => false, |
| 208 | ); |
| 209 | |
| 210 | if ( isset( $sizes[ $size ]['width'] ) ) { |
| 211 | $size_data['width'] = $sizes[ $size ]['width']; |
| 212 | } elseif ( isset( $metadata['sizes'][ $size ]['width'] ) ) { |
| 213 | $size_data['width'] = $metadata['sizes'][ $size ]['width']; |
| 214 | } |
| 215 | |
| 216 | if ( isset( $sizes[ $size ]['height'] ) ) { |
| 217 | $size_data['height'] = $sizes[ $size ]['height']; |
| 218 | } elseif ( isset( $metadata['sizes'][ $size ]['height'] ) ) { |
| 219 | $size_data['height'] = $metadata['sizes'][ $size ]['height']; |
| 220 | } |
| 221 | |
| 222 | if ( isset( $sizes[ $size ]['crop'] ) ) { |
| 223 | $size_data['crop'] = (bool) $sizes[ $size ]['crop']; |
| 224 | } |
| 225 | |
| 226 | return webp_uploads_generate_additional_image_source( $attachment_id, $size, $size_data, $mime ); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Returns the attachment sources array ordered by filesize. |
| 231 | * |
| 232 | * @since 1.0.0 |
| 233 | * |
| 234 | * @param int $attachment_id The attachment ID. |
| 235 | * @param string $size The attachment size. |
| 236 | * @return array The attachment sources array. |
| 237 | */ |
| 238 | function webp_uploads_get_attachment_sources( $attachment_id, $size = 'thumbnail' ) { |
| 239 | // Check for the sources attribute in attachment metadata. |
| 240 | $metadata = wp_get_attachment_metadata( $attachment_id ); |
| 241 | |
| 242 | // Return full image size sources. |
| 243 | if ( 'full' === $size && ! empty( $metadata['sources'] ) ) { |
| 244 | return $metadata['sources']; |
| 245 | } |
| 246 | |
| 247 | // Return the resized image sources. |
| 248 | if ( ! empty( $metadata['sizes'][ $size ]['sources'] ) ) { |
| 249 | return $metadata['sizes'][ $size ]['sources']; |
| 250 | } |
| 251 | |
| 252 | // Return an empty array if no sources found. |
| 253 | return array(); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Returns mime types that should be used for an image in the specific context. |
| 258 | * |
| 259 | * @since 1.4.0 |
| 260 | * |
| 261 | * @param int $attachment_id The attachment ID. |
| 262 | * @param string $context The current context. |
| 263 | * @return array Mime types to use for the image. |
| 264 | */ |
| 265 | function webp_uploads_get_content_image_mimes( $attachment_id, $context ) { |
| 266 | $target_mimes = array( 'image/webp', 'image/jpeg' ); |
| 267 | |
| 268 | /** |
| 269 | * Filters mime types that should be used to update all images in the content. The order of |
| 270 | * mime types matters. The first mime type in the list will be used if it is supported by an image. |
| 271 | * |
| 272 | * @since 1.0.0 |
| 273 | * |
| 274 | * @param array $target_mimes The list of mime types that can be used to update images in the content. |
| 275 | * @param int $attachment_id The attachment ID. |
| 276 | * @param string $context The current context. |
| 277 | */ |
| 278 | $target_mimes = apply_filters( 'webp_uploads_content_image_mimes', $target_mimes, $attachment_id, $context ); |
| 279 | if ( ! is_array( $target_mimes ) ) { |
| 280 | $target_mimes = array(); |
| 281 | } |
| 282 | |
| 283 | return $target_mimes; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Verifies if the request is for a frontend context within the <body> tag. |
| 288 | * |
| 289 | * @since 1.3.0 |
| 290 | * |
| 291 | * @return bool True if in the <body> within a frontend request, false otherwise. |
| 292 | */ |
| 293 | function webp_uploads_in_frontend_body() { |
| 294 | global $wp_query; |
| 295 | |
| 296 | // Check if this request is generally outside (or before) any frontend context. |
| 297 | if ( ! isset( $wp_query ) || defined( 'REST_REQUEST' ) || defined( 'XMLRPC_REQUEST' ) || is_feed() ) { |
| 298 | return false; |
| 299 | } |
| 300 | |
| 301 | // Check if we're anywhere before 'template_redirect' or within the 'wp_head' action. |
| 302 | if ( ! did_action( 'template_redirect' ) || doing_action( 'wp_head' ) ) { |
| 303 | return false; |
| 304 | } |
| 305 | |
| 306 | return true; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Check whether the additional image is larger than the original image. |
| 311 | * |
| 312 | * @since 1.3.0 |
| 313 | * |
| 314 | * @param array $original An array with the metadata of the attachment. |
| 315 | * @param array $additional An array containing the filename and file size for additional mime. |
| 316 | * @return bool True if the additional image is larger than the original image, otherwise false. |
| 317 | */ |
| 318 | function webp_uploads_should_discard_additional_image_file( array $original, array $additional ) { |
| 319 | $original_image_filesize = isset( $original['filesize'] ) ? (int) $original['filesize'] : 0; |
| 320 | $additional_image_filesize = isset( $additional['filesize'] ) ? (int) $additional['filesize'] : 0; |
| 321 | if ( $original_image_filesize > 0 && $additional_image_filesize > 0 ) { |
| 322 | /** |
| 323 | * Filter whether WebP images that are larger than the matching JPEG should be discarded. |
| 324 | * |
| 325 | * By default the performance lab plugin will use the mime type with the smaller filesize |
| 326 | * rather than defaulting to `webp`. |
| 327 | * |
| 328 | * @since 1.3.0 |
| 329 | * |
| 330 | * @param bool $preferred_filesize Prioritize file size over mime type. Default true. |
| 331 | */ |
| 332 | $webp_discard_larger_images = apply_filters( 'webp_uploads_discard_larger_generated_images', true ); |
| 333 | |
| 334 | if ( $webp_discard_larger_images && $additional_image_filesize >= $original_image_filesize ) { |
| 335 | return true; |
| 336 | } |
| 337 | } |
| 338 | return false; |
| 339 | } |
| 340 |