gpu_surface_metal_impeller.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_SHELL_GPU_GPU_SURFACE_METAL_IMPELLER_H_
#define FLUTTER_SHELL_GPU_GPU_SURFACE_METAL_IMPELLER_H_
 
#include <Metal/Metal.h>
 
#include "flutter/flow/surface.h"
#include "flutter/fml/macros.h"
#include "flutter/impeller/display_list/aiks_context.h"
#include "flutter/impeller/renderer/backend/metal/context_mtl.h"
#include "flutter/impeller/renderer/backend/metal/swapchain_transients_mtl.h"
#include "flutter/shell/gpu/gpu_surface_metal_delegate.h"
#include "third_party/skia/include/gpu/ganesh/mtl/GrMtlTypes.h"
 
namespace flutter {
 
class IMPELLER_CA_METAL_LAYER_AVAILABLE GPUSurfaceMetalImpeller
    : public Surface {
 public:
  GPUSurfaceMetalImpeller(GPUSurfaceMetalDelegate* delegate,
                          const std::shared_ptr<impeller::AiksContext>& context,
                          bool render_to_surface = true);
 
  // |Surface|
  ~GPUSurfaceMetalImpeller();
 
  // |Surface|
  bool IsValid() override;
 
  virtual Surface::SurfaceData GetSurfaceData() const override;
 
 private:
  const GPUSurfaceMetalDelegate* delegate_;
  const MTLRenderTargetType render_target_type_;
  std::shared_ptr<impeller::AiksContext> aiks_context_;
  id<MTLTexture> last_texture_;
  // TODO(38466): Refactor GPU surface APIs take into account the fact that an
  // external view embedder may want to render to the root surface. This is a
  // hack to make avoid allocating resources for the root surface when an
  // external view embedder is present.
  bool render_to_surface_ = true;
  bool disable_partial_repaint_ = false;
  // Accumulated damage for each framebuffer; Key is address of underlying
  // MTLTexture for each drawable
  std::shared_ptr<std::map<void*, DlIRect>> damage_ =
      std::make_shared<std::map<void*, DlIRect>>();
  std::shared_ptr<impeller::SwapchainTransientsMTL> swapchain_transients_;
 
  // |Surface|
  std::unique_ptr<SurfaceFrame> AcquireFrame(
      const DlISize& frame_size) override;
 
  std::unique_ptr<SurfaceFrame> AcquireFrameFromCAMetalLayer(
      const DlISize& frame_size);
 
  std::unique_ptr<SurfaceFrame> AcquireFrameFromMTLTexture(
      const DlISize& frame_size);
 
  // |Surface|
  DlMatrix GetRootTransformation() const override;
 
  // |Surface|
  GrDirectContext* GetContext() override;
 
  // |Surface|
  std::unique_ptr<GLContextResult> MakeRenderContextCurrent() override;
 
  // |Surface|
  bool AllowsDrawingWhenGpuDisabled() const override;
 
  // |Surface|
  bool EnableRasterCache() const override;
 
  // |Surface|
  std::shared_ptr<impeller::AiksContext> GetAiksContext() const override;
 
  FML_DISALLOW_COPY_AND_ASSIGN(GPUSurfaceMetalImpeller);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_GPU_GPU_SURFACE_METAL_IMPELLER_H_