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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName /** * Tonesque * Grab an average color representation from an image. * * @author Automattic * @author Matias Ventura * @package automattic/jetpack */ if ( ! class_exists( 'Tonesque' ) ) { /** * Color representation class. */ class Tonesque { /** * Image URL. * * @var string */ private $image_url = ''; /** * Image identifier representing the image. * * @var null|object */ private $image_obj = null; /** * Color code. * * @var string */ private $color = ''; /** * Constructor. * * @param string $image_url Image URL. */ public function __construct( $image_url ) { _deprecated_function( 'Tonesque::__construct', 'jetpack-13.8' ); if ( ! class_exists( 'Jetpack_Color' ) ) { require_once JETPACK__PLUGIN_DIR . '/_inc/lib/class.color.php'; } $this->image_url = esc_url_raw( $image_url ); $this->image_url = trim( $this->image_url ); /** * Allows any image URL to be passed in for $this->image_url. * * @module theme-tools * * @since 2.5.0 * * @param string $image_url The URL to any image */ $this->image_url = apply_filters( 'tonesque_image_url', $this->image_url ); $this->image_obj = self::imagecreatefromurl( $this->image_url ); } /** * Get an image object from a URL. * * @param string $image_url Image URL. * * @return object|bool Image object or false if the image could not be loaded. */ public static function imagecreatefromurl( $image_url ) { _deprecated_function( 'Tonesque::imagecreatefromurl', 'jetpack-13.8' ); $data = null; // If it's a URL. if ( preg_match( '#^https?://#i', $image_url ) ) { // If it's a url pointing to a local media library url. $content_url = content_url(); $_image_url = set_url_scheme( $image_url ); if ( str_starts_with( $_image_url, $content_url ) ) { $_image_path = str_replace( $content_url, WP_CONTENT_DIR, $_image_url ); if ( file_exists( $_image_path ) ) { $filetype = wp_check_filetype( $_image_path ); $type = $filetype['type']; if ( str_starts_with( $type, 'image/' ) ) { $data = file_get_contents( $_image_path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents } } } if ( empty( $data ) ) { $response = wp_safe_remote_get( $image_url ); $response_code = wp_remote_retrieve_response_code( $response ); if ( is_wp_error( $response ) || ! $response_code || $response_code < 200 || $response_code >= 300 ) { return false; } $data = wp_remote_retrieve_body( $response ); } } // If it's a local path in our WordPress install. if ( file_exists( $image_url ) ) { $filetype = wp_check_filetype( $image_url ); $type = $filetype['type']; if ( str_starts_with( $type, 'image/' ) ) { $data = file_get_contents( $image_url ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents } } if ( null === $data ) { return false; } // Now turn it into an image and return it. return imagecreatefromstring( $data ); } /** * Construct object from image. * * @param string $type Type (hex, rgb, hsv) (optional). * * @return string|bool color as a string formatted as $type or false if the image could not be loaded. */ public function color( $type = 'hex' ) { // Bail if there is no image to work with. if ( ! $this->image_obj ) { return false; } // Finds dominant color. $color = self::grab_color(); // Passes value to Color class. return self::get_color( $color, $type ); } /** * Grabs the color index for each of five sample points of the image * * @param string $type can be 'index' or 'hex'. * * @return array|false color indices or false if the image could not be loaded. */ public function grab_points( $type = 'index' ) { $img = $this->image_obj; if ( ! $img ) { return false; } $height = imagesy( $img ); $width = imagesx( $img ); /* * Sample five points in the image * based on rule of thirds and center. */ $topy = round( $height / 3 ); $bottomy = round( ( $height / 3 ) * 2 ); $leftx = round( $width / 3 ); $rightx = round( ( $width / 3 ) * 2 ); $centery = round( $height / 2 ); $centerx = round( $width / 2 ); // Cast those colors into an array. $points = array( imagecolorat( $img, $leftx, $topy ), imagecolorat( $img, $rightx, $topy ), imagecolorat( $img, $leftx, $bottomy ), imagecolorat( $img, $rightx, $bottomy ), imagecolorat( $img, $centerx, $centery ), ); if ( 'hex' === $type ) { foreach ( $points as $i => $p ) { $c = imagecolorsforindex( $img, $p ); $points[ $i ] = self::get_color( array( 'r' => $c['red'], 'g' => $c['green'], 'b' => $c['blue'], ), 'hex' ); } } return $points; } /** * Finds the average color of the image based on five sample points * * @return array|bool array with rgb color or false if the image could not be loaded. */ public function grab_color() { $img = $this->image_obj; if ( ! $img ) { return false; } $rgb = self::grab_points(); $r = array(); $g = array(); $b = array(); /* * Process the color points * Find the average representation */ foreach ( $rgb as $color ) { $index = imagecolorsforindex( $img, $color ); $r[] = $index['red']; $g[] = $index['green']; $b[] = $index['blue']; } $red = round( array_sum( $r ) / 5 ); $green = round( array_sum( $g ) / 5 ); $blue = round( array_sum( $b ) / 5 ); // The average color of the image as rgb array. $color = array( 'r' => $red, 'g' => $green, 'b' => $blue, ); return $color; } /** * Get a Color object using /lib class.color * Convert to appropriate type * * @param string $color Color code. * @param string $type Color type (rgb, hex, hsv). * * @return string */ public function get_color( $color, $type ) { $c = new Jetpack_Color( $color, 'rgb' ); $this->color = $c; switch ( $type ) { case 'rgb': $color = implode( ',', $c->toRgbInt() ); break; case 'hex': $color = $c->toHex(); break; case 'hsv': $color = implode( ',', $c->toHsvInt() ); break; default: return $c->toHex(); } return $color; } /** * * Checks contrast against main color * Gives either black or white for using with opacity * * @return string|bool Returns black or white or false if the image could not be loaded. */ public function contrast() { if ( ! $this->color ) { return false; } $c = $this->color->getMaxContrastColor(); return implode( ',', $c->toRgbInt() ); } } }
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