[core] add ability show visualize the depth buffer to the GLFW and macOS app

1 files changed, 10 insertions, 1 deletions

diff --git a/include/mbgl/map/mode.hpp b/include/mbgl/map/mode.hpp
index c9b9f60953..2efc8b18e0 100644
--- a/include/mbgl/map/mode.hpp
+++ b/include/mbgl/map/mode.hpp
@@ -47,6 +47,7 @@ enum class MapDebugOptions : EnumType {
 // FIXME: https://github.com/mapbox/mapbox-gl-native/issues/5117
 #ifndef GL_ES_VERSION_2_0
     StencilClip = 1 << 6,
+    DepthBuffer = 1 << 7,
 #endif // GL_ES_VERSION_2_0
 };
 
@@ -55,11 +56,19 @@ constexpr MapDebugOptions operator|(MapDebugOptions lhs, MapDebugOptions rhs) {
 }
 
 constexpr MapDebugOptions& operator|=(MapDebugOptions& lhs, MapDebugOptions rhs) {
-    return (lhs = lhs | rhs);
+    return (lhs = MapDebugOptions(mbgl::underlying_type(lhs) | mbgl::underlying_type(rhs)));
 }
 
 constexpr bool operator&(MapDebugOptions lhs, MapDebugOptions rhs) {
     return mbgl::underlying_type(lhs) & mbgl::underlying_type(rhs);
 }
 
+constexpr MapDebugOptions& operator&=(MapDebugOptions& lhs, MapDebugOptions rhs) {
+    return (lhs = MapDebugOptions(mbgl::underlying_type(lhs) & mbgl::underlying_type(rhs)));
+}
+
+constexpr MapDebugOptions operator~(MapDebugOptions value) {
+    return MapDebugOptions(~mbgl::underlying_type(value));
+}
+
 } // namespace mbgl