1 files changed, 19 insertions, 8 deletions
diff --git a/Source/WebCore/html/canvas/WebGLContextAttributes.idl b/Source/WebCore/html/canvas/WebGLContextAttributes.idl
index 41bf10234..3be5ac599 100644
--- a/Source/WebCore/html/canvas/WebGLContextAttributes.idl
+++ b/Source/WebCore/html/canvas/WebGLContextAttributes.idl
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
+ * Copyright (c) 2017, Apple, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -24,14 +25,24 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+typedef boolean GLboolean;
+
+enum WebGLPowerPreference {
+    "default",
+    "low-power",
+    "high-performance"
+};
+
 [
-    NoInterfaceObject,
     Conditional=WEBGL,
-] interface WebGLContextAttributes {
-    attribute boolean alpha;
-    attribute boolean depth;
-    attribute boolean stencil;
-    attribute boolean antialias;
-    attribute boolean premultipliedAlpha;
-    attribute boolean preserveDrawingBuffer;
+    JSGenerateToJSObject
+] dictionary WebGLContextAttributes {
+    GLboolean alpha = true;
+    GLboolean depth = true;
+    GLboolean stencil = false;
+    GLboolean antialias = true;
+    GLboolean premultipliedAlpha = true;
+    GLboolean preserveDrawingBuffer = false;
+    WebGLPowerPreference powerPreference = "default";
+    GLboolean failIfMajorPerformanceCaveat = false;
 };