PNG writer

apps/LoopThroughWithOpenGLCompositing/control/ControlServer.cpp

@@ -433,6 +433,11 @@ bool ControlServer::InvokePostRoute(const std::string& path, const JsonValue& ro
 			{
 				return mCallbacks.reloadShader && mCallbacks.reloadShader(error);
 			}
+		},
+		{ "/api/screenshot", [this](const JsonValue&, std::string& error)
+			{
+				return mCallbacks.requestScreenshot && mCallbacks.requestScreenshot(error);
+			}
 		}
 	};