gpu_surface_vulkan.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_VULKAN_H_
#define FLUTTER_SHELL_GPU_GPU_SURFACE_VULKAN_H_
 
#include <memory>
 
#include "flutter/flow/surface.h"
#include "flutter/fml/macros.h"
#include "flutter/fml/memory/weak_ptr.h"
#include "flutter/shell/gpu/gpu_surface_vulkan_delegate.h"
#include "flutter/vulkan/vulkan_backbuffer.h"
#include "flutter/vulkan/vulkan_native_surface.h"
 
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkSurface.h"
 
namespace flutter {
 
//------------------------------------------------------------------------------
/// @brief  A GPU surface backed by VkImages provided by a
///         GPUSurfaceVulkanDelegate.
///
class GPUSurfaceVulkan : public Surface {
 public:
  //------------------------------------------------------------------------------
  /// @brief      Create a GPUSurfaceVulkan while letting it reuse an existing
  ///             GrDirectContext.
  ///
  GPUSurfaceVulkan(GPUSurfaceVulkanDelegate* delegate,
                   const sk_sp<GrDirectContext>& context,
                   bool render_to_surface);
 
  ~GPUSurfaceVulkan() override;
 
  // |Surface|
  bool IsValid() override;
 
  // |Surface|
  std::unique_ptr<SurfaceFrame> AcquireFrame(const DlISize& size) override;
 
  // |Surface|
  DlMatrix GetRootTransformation() const override;
 
  // |Surface|
  GrDirectContext* GetContext() override;
 
  static SkColorType ColorTypeFromFormat(const VkFormat format);
 
 private:
  GPUSurfaceVulkanDelegate* delegate_;
  sk_sp<GrDirectContext> skia_context_;
  bool render_to_surface_;
 
  fml::WeakPtrFactory<GPUSurfaceVulkan> weak_factory_;
 
  sk_sp<SkSurface> CreateSurfaceFromVulkanImage(const VkImage image,
                                                const VkFormat format,
                                                const DlISize& size);
 
  FML_DISALLOW_COPY_AND_ASSIGN(GPUSurfaceVulkan);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_GPU_GPU_SURFACE_VULKAN_H_