2 files changed, 10 insertions, 2 deletions
diff --git a/tools/gfx/apple/cocoa-util.h b/tools/gfx/apple/cocoa-util.h
index 565783ee9..e9d29b87c 100644
--- a/tools/gfx/apple/cocoa-util.h
+++ b/tools/gfx/apple/cocoa-util.h
@@ -9,7 +9,7 @@ struct CocoaUtil {
 
     static void* createMetalLayer(void* nswindow);
     static void destroyMetalLayer(void* metalLayer);
-
+    static void* nextDrawable(void* metalLayer) ;
 };
 
 }
diff --git a/tools/gfx/apple/cocoa-util.mm b/tools/gfx/apple/cocoa-util.mm
index 29c3056a9..5c12e587a 100644
--- a/tools/gfx/apple/cocoa-util.mm
+++ b/tools/gfx/apple/cocoa-util.mm
@@ -22,10 +22,18 @@ void* CocoaUtil::createMetalLayer(void* nswindow)
     return layer;
 }
 
+void* CocoaUtil::nextDrawable(void* metalLayer)
+{
+    CAMetalLayer* layer = (CAMetalLayer*)metalLayer;
+    return [layer nextDrawable];
+}
+
 void CocoaUtil::destroyMetalLayer(void* metalLayer)
 {
     CAMetalLayer* layer = (CAMetalLayer*)metalLayer;
     [layer release];
 }
 
-}
-\ No newline at end of file
+
+
+}