1 files changed, 37 insertions, 0 deletions
diff --git a/plugins/jetpack/modules/theme-tools/devicepx.php b/plugins/jetpack/modules/theme-tools/devicepx.php
new file mode 100644
index 00000000..fb243e56
--- /dev/null
+++ b/plugins/jetpack/modules/theme-tools/devicepx.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Loads the devicepx library which improves the resolution of gravatars and
+ * wordpress.com uploads on hi-res and zoomed browsers.
+ *
+ * This feature will only be activated for themes that declare their support.
+ * This can be done by adding code similar to the following during the
+ * 'after_setup_theme' action:
+ *
+ * add_theme_support( 'jetpack-devicepx' );
+ */
+
+/**
+ * Enqueue the devicepx JS library, if enabled. The feature must
+ * be enabled earlier during `after_setup_theme`.
+ *
+ * @uses current_theme_supports, add_action
+ */
+function jetpack_devicepx_init() {
+	if ( current_theme_supports( 'jetpack-devicepx' ) ) {
+		add_action( 'wp_enqueue_scripts', 'jetpack_devicepx_enqueue' );
+		add_action( 'customize_controls_enqueue_scripts', 'jetpack_devicepx_enqueue' );
+		add_action( 'admin_enqueue_scripts', 'jetpack_devicepx_enqueue' );
+	}
+}
+
+// Use a late priority to ensure that plugins and themes can enable or disable this feature.
+add_action( 'init', 'jetpack_devicepx_init', 99 );
+
+/**
+ * Enqueue the devicepx JS library.
+ *
+ * @uses wp_enqueue_script
+ */
+function jetpack_devicepx_enqueue() {
+	wp_enqueue_script( 'devicepx', 'https://s0.wp.com/wp-content/js/devicepx-jetpack.js', array(), gmdate( 'oW' ), true );
+}