WP_Image_Editor_Imagick::load() WordPress Method

	public function load() {
		if ( $this->image instanceof Imagick ) {
			return true;
		}

		if ( ! is_file( $this->file ) && ! wp_is_stream( $this->file ) ) {
			return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
		}

		/*
		 * Even though Imagick uses less PHP memory than GD, set higher limit
		 * for users that have low PHP.ini limits.
		 */
		wp_raise_memory_limit( 'image' );

		try {
			$this->image    = new Imagick();
			$file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) );

			if ( 'pdf' === $file_extension ) {
				$pdf_loaded = $this->pdf_load_source();

				if ( is_wp_error( $pdf_loaded ) ) {
					return $pdf_loaded;
				}
			} else {
				if ( wp_is_stream( $this->file ) ) {
					// Due to reports of issues with streams with `Imagick::readImageFile()`, uses `Imagick::readImageBlob()` instead.
					$this->image->readImageBlob( file_get_contents( $this->file ), $this->file );
				} else {
					$this->image->readImage( $this->file );
				}
			}

			if ( ! $this->image->valid() ) {
				return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
			}

			// Select the first frame to handle animated images properly.
			if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) {
				$this->image->setIteratorIndex( 0 );
			}

			$this->mime_type = $this->get_mime_type( $this->image->getImageFormat() );
		} catch ( Exception $e ) {
			return new WP_Error( 'invalid_image', $e->getMessage(), $this->file );
		}

		$updated_size = $this->update_size();

		if ( is_wp_error( $updated_size ) ) {
			return $updated_size;
		}

		return $this->set_quality();
	}