// Copyright(c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// VulkanHpp Samples : 10_InitRenderPass
//                     Initialize a render pass

#include "../utils/utils.hpp"
#include "vulkan/vulkan.hpp"

#include <iostream>

#define GLM_FORCE_RADIANS
#pragma warning( disable : 4201 )  // disable warning C4201: nonstandard extension used: nameless struct/union; needed
                                   // to get glm/detail/type_vec?.hpp without warnings
#include <glm/gtc/matrix_transform.hpp>

static char const * AppName    = "10_InitRenderPass";
static char const * EngineName = "Vulkan.hpp";

int main( int /*argc*/, char ** /*argv*/ )
{
  try
  {
    vk::UniqueInstance instance = vk::su::createInstance( AppName, EngineName, {}, vk::su::getInstanceExtensions() );
#if !defined( NDEBUG )
    vk::UniqueDebugUtilsMessengerEXT debugUtilsMessenger = vk::su::createDebugUtilsMessenger( instance );
#endif

    vk::PhysicalDevice physicalDevice = instance->enumeratePhysicalDevices().front();

    vk::su::SurfaceData surfaceData( instance, AppName, vk::Extent2D( 64, 64 ) );

    std::pair<uint32_t, uint32_t> graphicsAndPresentQueueFamilyIndex =
      vk::su::findGraphicsAndPresentQueueFamilyIndex( physicalDevice, *surfaceData.surface );
    vk::UniqueDevice device =
      vk::su::createDevice( physicalDevice, graphicsAndPresentQueueFamilyIndex.first, vk::su::getDeviceExtensions() );

    vk::Format colorFormat =
      vk::su::pickSurfaceFormat( physicalDevice.getSurfaceFormatsKHR( surfaceData.surface.get() ) ).format;
    vk::Format depthFormat = vk::Format::eD16Unorm;

    /* VULKAN_HPP_KEY_START */

    std::array<vk::AttachmentDescription, 2> attachmentDescriptions;
    attachmentDescriptions[0] = vk::AttachmentDescription( vk::AttachmentDescriptionFlags(),
                                                           colorFormat,
                                                           vk::SampleCountFlagBits::e1,
                                                           vk::AttachmentLoadOp::eClear,
                                                           vk::AttachmentStoreOp::eStore,
                                                           vk::AttachmentLoadOp::eDontCare,
                                                           vk::AttachmentStoreOp::eDontCare,
                                                           vk::ImageLayout::eUndefined,
                                                           vk::ImageLayout::ePresentSrcKHR );
    attachmentDescriptions[1] = vk::AttachmentDescription( vk::AttachmentDescriptionFlags(),
                                                           depthFormat,
                                                           vk::SampleCountFlagBits::e1,
                                                           vk::AttachmentLoadOp::eClear,
                                                           vk::AttachmentStoreOp::eDontCare,
                                                           vk::AttachmentLoadOp::eDontCare,
                                                           vk::AttachmentStoreOp::eDontCare,
                                                           vk::ImageLayout::eUndefined,
                                                           vk::ImageLayout::eDepthStencilAttachmentOptimal );

    vk::AttachmentReference colorReference( 0, vk::ImageLayout::eColorAttachmentOptimal );
    vk::AttachmentReference depthReference( 1, vk::ImageLayout::eDepthStencilAttachmentOptimal );
    vk::SubpassDescription  subpass(
      vk::SubpassDescriptionFlags(), vk::PipelineBindPoint::eGraphics, {}, colorReference, {}, &depthReference );

    vk::UniqueRenderPass renderPass = device->createRenderPassUnique(
      vk::RenderPassCreateInfo( vk::RenderPassCreateFlags(), attachmentDescriptions, subpass ) );

    // Note: No need to explicitly destroy the RenderPass or the Semaphore, as the corresponding destroy
    // functions are called by the destructor of the UniqueRenderPass and the UniqueSemaphore on leaving this scope.

    /* VULKAN_HPP_KEY_END */
  }
  catch ( vk::SystemError & err )
  {
    std::cout << "vk::SystemError: " << err.what() << std::endl;
    exit( -1 );
  }
  catch ( std::exception & err )
  {
    std::cout << "std::exception: " << err.what() << std::endl;
    exit( -1 );
  }
  catch ( ... )
  {
    std::cout << "unknown error\n";
    exit( -1 );
  }
  return 0;
}