dl_test_surface_metal.h

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// 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.
 
#ifndef FLUTTER_DISPLAY_LIST_TESTING_DL_TEST_SURFACE_METAL_H_
#define FLUTTER_DISPLAY_LIST_TESTING_DL_TEST_SURFACE_METAL_H_
 
#include "flutter/display_list/testing/dl_test_surface_provider.h"
#include "flutter/fml/platform/darwin/scoped_nsautorelease_pool.h"
#include "flutter/impeller/golden_tests/metal_screenshotter.h"
#include "flutter/testing/test_metal_surface.h"
 
namespace flutter {
namespace testing {
 
using MetalScreenshotter = impeller::testing::MetalScreenshotter;
 
class DlMetalSurfaceProvider : public DlSurfaceProvider {
 public:
  explicit DlMetalSurfaceProvider() : DlSurfaceProvider() {}
  virtual ~DlMetalSurfaceProvider() = default;
 
  bool InitializeSurface(size_t width,
                         size_t height,
                         PixelFormat format) override;
  std::shared_ptr<DlSurfaceInstance> GetPrimarySurface() const override;
  std::shared_ptr<DlSurfaceInstance> MakeOffscreenSurface(
      size_t width,
      size_t height,
      PixelFormat format) const override;
  const std::string backend_name() const override { return "Metal"; }
  BackendType backend_type() const override { return kMetalBackend; }
  bool supports(PixelFormat format) const override {
    return format == kN32PremulPixelFormat;
  }
  bool supports_impeller() const override { return true; }
  sk_sp<DlPixelData> ImpellerSnapshot(const sk_sp<DisplayList>& list,
                                      int width,
                                      int height) const override;
  virtual sk_sp<DlImage> MakeImpellerImage(const sk_sp<DisplayList>& list,
                                           int width,
                                           int height) const override;
 
 private:
  // This must be placed before any other members that may use the
  // autorelease pool.
  fml::ScopedNSAutoreleasePool autorelease_pool_;
 
  std::unique_ptr<TestMetalContext> metal_context_;
  std::shared_ptr<DlSurfaceInstance> metal_surface_;
  mutable std::unique_ptr<MetalScreenshotter> snapshotter_;
  mutable std::unique_ptr<impeller::AiksContext> aiks_context_;
 
  void InitScreenShotter() const;
};
 
}  // namespace testing
}  // namespace flutter
 
#endif  // FLUTTER_DISPLAY_LIST_TESTING_DL_TEST_SURFACE_METAL_H_