vulkan/vulkan_native_surface_android.cc

// 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/vulkan/vulkan_native_surface_android.h"

#include <android/native_window.h>

#include "third_party/skia/include/gpu/vk/GrVkBackendContext.h"

namespace vulkan {

VulkanNativeSurfaceAndroid::VulkanNativeSurfaceAndroid(
    ANativeWindow* native_window)
    : native_window_(native_window) {
  if (native_window_ == nullptr) {
    return;
  }
  ANativeWindow_acquire(native_window_);
}

VulkanNativeSurfaceAndroid::~VulkanNativeSurfaceAndroid() {
  if (native_window_ == nullptr) {
    return;
  }
  ANativeWindow_release(native_window_);
}

const char* VulkanNativeSurfaceAndroid::GetExtensionName() const {
  return VK_KHR_ANDROID_SURFACE_EXTENSION_NAME;
}

uint32_t VulkanNativeSurfaceAndroid::GetSkiaExtensionName() const {
  return kKHR_android_surface_GrVkExtensionFlag;
}

VkSurfaceKHR VulkanNativeSurfaceAndroid::CreateSurfaceHandle(
    VulkanProcTable& vk,
    const VulkanHandle<VkInstance>& instance) const {
  if (!vk.IsValid() || !instance) {
    return VK_NULL_HANDLE;
  }

  const VkAndroidSurfaceCreateInfoKHR create_info = {
      .sType = VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR,
      .pNext = nullptr,
      .flags = 0,
      .window = native_window_,
  };

  VkSurfaceKHR surface = VK_NULL_HANDLE;

  if (VK_CALL_LOG_ERROR(vk.CreateAndroidSurfaceKHR(
          instance, &create_info, nullptr, &surface)) != VK_SUCCESS) {
    return VK_NULL_HANDLE;
  }

  return surface;
}

bool VulkanNativeSurfaceAndroid::IsValid() const {
  return native_window_ != nullptr;
}

SkISize VulkanNativeSurfaceAndroid::GetSize() const {
  return native_window_ == nullptr
             ? SkISize::Make(0, 0)
             : SkISize::Make(ANativeWindow_getWidth(native_window_),
                             ANativeWindow_getHeight(native_window_));
}

}  // namespace vulkan