android_surface_vk_impeller.cc

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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.
 
#include "flutter/shell/platform/android/android_surface_vk_impeller.h"
 
#include <memory>
#include <utility>
 
#include "flutter/fml/concurrent_message_loop.h"
#include "flutter/fml/logging.h"
#include "flutter/fml/memory/ref_ptr.h"
#include "flutter/impeller/renderer/backend/vulkan/context_vk.h"
#include "flutter/impeller/renderer/backend/vulkan/swapchain/swapchain_vk.h"
#include "flutter/shell/gpu/gpu_surface_vulkan_impeller.h"
#include "flutter/vulkan/vulkan_native_surface_android.h"
#include "impeller/renderer/backend/vulkan/swapchain/ahb/ahb_swapchain_vk.h"
#include "impeller/toolkit/android/surface_transaction.h"
 
namespace flutter {
 
AndroidSurfaceVKImpeller::AndroidSurfaceVKImpeller(
    const std::shared_ptr<AndroidContextVKImpeller>& android_context) {
  is_valid_ = android_context->IsValid();
 
  auto& context_vk =
      impeller::ContextVK::Cast(*android_context->GetImpellerContext());
  surface_context_vk_ = context_vk.CreateSurfaceContext();
}
 
AndroidSurfaceVKImpeller::~AndroidSurfaceVKImpeller() = default;
 
bool AndroidSurfaceVKImpeller::IsValid() const {
  return is_valid_;
}
 
void AndroidSurfaceVKImpeller::TeardownOnScreenContext() {
  surface_context_vk_->TeardownSwapchain();
}
 
std::unique_ptr<Surface> AndroidSurfaceVKImpeller::CreateGPUSurface(
    GrDirectContext* gr_context) {
  if (!IsValid()) {
    return nullptr;
  }
 
  if (!native_window_ || !native_window_->IsValid()) {
    return nullptr;
  }
 
  std::unique_ptr<GPUSurfaceVulkanImpeller> gpu_surface =
      std::make_unique<GPUSurfaceVulkanImpeller>(nullptr, surface_context_vk_);
 
  if (!gpu_surface->IsValid()) {
    return nullptr;
  }
 
  return gpu_surface;
}
 
bool AndroidSurfaceVKImpeller::OnScreenSurfaceResize(const DlISize& size) {
  surface_context_vk_->UpdateSurfaceSize(
      impeller::ISize{size.width, size.height});
  return true;
}
 
bool AndroidSurfaceVKImpeller::ResourceContextMakeCurrent() {
  return true;
}
 
bool AndroidSurfaceVKImpeller::ResourceContextClearCurrent() {
  return true;
}
 
bool AndroidSurfaceVKImpeller::SetNativeWindow(
    fml::RefPtr<AndroidNativeWindow> window,
    const std::shared_ptr<PlatformViewAndroidJNI>& jni_facade) {
  if (window && (native_window_ == window)) {
    return OnScreenSurfaceResize(window->GetSize());
  }
 
  native_window_ = nullptr;
 
  if (!window || !window->IsValid()) {
    return false;
  }
 
  impeller::CreateTransactionCB cb = [jni_facade = jni_facade]() {
    FML_CHECK(jni_facade) << "JNI was nullptr";
    ASurfaceTransaction* tx = jni_facade->createTransaction();
    if (tx == nullptr) {
      return impeller::android::SurfaceTransaction();
    }
    return impeller::android::SurfaceTransaction(tx);
  };
 
  auto swapchain = impeller::SwapchainVK::Create(
      std::reinterpret_pointer_cast<impeller::Context>(
          surface_context_vk_->GetParent()),
      window->handle(), cb);
 
  if (surface_context_vk_->SetSwapchain(std::move(swapchain))) {
    native_window_ = std::move(window);
    return true;
  }
 
  return false;
}
 
std::shared_ptr<impeller::Context>
AndroidSurfaceVKImpeller::GetImpellerContext() {
  return surface_context_vk_;
}
 
}  // namespace flutter