Media: Reset Exif orientation after rotate in WP_Image_Editor_Imagick.

Due to inconsistencies in the way browsers handle Exif orientation data,
if a user manually rotates an image within WordPress, set the Exif orientation to
the default (1) so that the image displays with the same rotation/flip in every browser.

Props sanchothefat, triplejumper12, joemcgill, azaozz, markoheijnen, mikeschroder.
Merges [40123] and [40129] to the 4.7 branch.
Fixes #37140. See #14459.

Built from https://develop.svn.wordpress.org/branches/4.7@40135


git-svn-id: http://core.svn.wordpress.org/branches/4.7@40072 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-image-editor-imagick.php

@@ -549,6 +549,11 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 		try {
 			$this->image->rotateImage( new ImagickPixel('none'), 360-$angle );
 
+			// Normalise Exif orientation data so that display is consistent across devices.
+			if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
+				$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
+			}
+
 			// Since this changes the dimensions of the image, update the size.
 			$result = $this->update_size();
 			if ( is_wp_error( $result ) )

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7.3-alpha-40134';
+$wp_version = '4.7.3-alpha-40135';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.