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public function maybe_exif_rotate() {

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$orientation = null;

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if ( is_callable( 'exif_read_data' ) && 'image/jpeg' === $this->mime_type ) {

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$exif_data = @exif_read_data( $this->file );

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if ( ! empty( $exif_data['Orientation'] ) ) {

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$orientation = (int) $exif_data['Orientation'];

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}

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}

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/**

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* Filters the `$orientation` value to correct it before rotating or to prevent rotating the image.

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* @since 5.3.0

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* @param int $orientation EXIF Orientation value as retrieved from the image file.

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* @param string $file Path to the image file.

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$orientation = apply_filters( 'wp_image_maybe_exif_rotate', $orientation, $this->file );

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if ( ! $orientation || 1 === $orientation ) {

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return false;

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}

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switch ( $orientation ) {

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case 2:

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// Flip horizontally.

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$result = $this->flip( false, true );

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break;

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case 3:

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* Rotate 180 degrees or flip horizontally and vertically.

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* Flipping seems faster and uses less resources.

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$result = $this->flip( true, true );

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break;

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case 4:

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// Flip vertically.

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$result = $this->flip( true, false );

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break;

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case 5:

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// Rotate 90 degrees counter-clockwise and flip vertically.

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$result = $this->rotate( 90 );

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if ( ! is_wp_error( $result ) ) {

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$result = $this->flip( true, false );

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}

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break;

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case 6:

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// Rotate 90 degrees clockwise (270 counter-clockwise).

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$result = $this->rotate( 270 );

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break;

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case 7:

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// Rotate 90 degrees counter-clockwise and flip horizontally.

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$result = $this->rotate( 90 );

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if ( ! is_wp_error( $result ) ) {

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$result = $this->flip( false, true );

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}

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break;

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case 8:

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// Rotate 90 degrees counter-clockwise.

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$result = $this->rotate( 90 );

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break;

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}

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return $result;

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}

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/**

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* Either calls editor's save function or handles file as a stream.

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* @since 3.5.0

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* @param string $filename

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* @param callable $callback

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* @param array $arguments

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* @return bool

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protected function make_image( $filename, $callback, $arguments ) {

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$stream = wp_is_stream( $filename );

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if ( $stream ) {

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ob_start();

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} else {

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// The directory containing the original file may no longer exist when using a replication plugin.

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wp_mkdir_p( dirname( $filename ) );

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}

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$result = call_user_func_array( $callback, $arguments );

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if ( $result && $stream ) {

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$contents = ob_get_contents();

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$fp = fopen( $filename, 'w' );

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if ( ! $fp ) {

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ob_end_clean();

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return false;

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}

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fwrite( $fp, $contents );

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fclose( $fp );

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}

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if ( $stream ) {

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ob_end_clean();

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}

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return $result;

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}

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/**

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* Returns first matched mime-type from extension,

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* as mapped from wp_get_mime_types()

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* @since 3.5.0

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* @param string $extension

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* @return string|false

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protected static function get_mime_type( $extension = null ) {

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if ( ! $extension ) {

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return false;

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}

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$mime_types = wp_get_mime_types();

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$extensions = array_keys( $mime_types );

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foreach ( $extensions as $_extension ) {

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if ( preg_match( "/{$extension}/i", $_extension ) ) {

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return $mime_types[ $_extension ];

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}

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}

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return false;

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}

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/**

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* Returns first matched extension from Mime-type,

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* as mapped from wp_get_mime_types()

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* @since 3.5.0

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* @param string $mime_type

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* @return string|false

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protected static function get_extension( $mime_type = null ) {

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if ( empty( $mime_type ) ) {

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return false;

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}

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return wp_get_default_extension_for_mime_type( $mime_type );

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}

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}

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