| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import <Cocoa/Cocoa.h> |
| |
| /** |
| * Flutter on macOS currently supports both OpenGL and Metal rendering backends. This class provides |
| * utilities for determining the rendering backend and the corresponging layer properties. |
| */ |
| @interface FlutterRenderingBackend : NSObject |
| |
| /** |
| * Returns YES if the engine is supposed to use Metal as the rendering backend. On macOS versions |
| * >= 10.4 this is YES. |
| */ |
| + (BOOL)renderUsingMetal; |
| |
| /** |
| * CALayer class depending on the rendering backend. |
| */ |
| + (nonnull Class)layerClass; |
| |
| /** |
| * On both Metal and OpenGL rendering backends, `wantsLayer` is set on the `FlutterView`. This |
| * methos is used by `FlutterView` to provide the said `CALayer`. |
| */ |
| + (nonnull CALayer*)createBackingLayer; |
| |
| @end |
