// 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 : 08_InitPipelineLayout
//                     Initialize a descriptor and pipeline layout

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

#include <iostream>

static char const * AppName    = "08_InitPipelineLayout";
static char const * EngineName = "Vulkan.hpp";

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

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

    vk::UniqueDevice device = vk::su::createDevice(
      physicalDevice, vk::su::findGraphicsQueueFamilyIndex( physicalDevice.getQueueFamilyProperties() ) );

    /* VULKAN_HPP_KEY_START */

    // create a DescriptorSetLayout
    vk::DescriptorSetLayoutBinding descriptorSetLayoutBinding(
      0, vk::DescriptorType::eUniformBuffer, 1, vk::ShaderStageFlagBits::eVertex );
    vk::UniqueDescriptorSetLayout descriptorSetLayout = device->createDescriptorSetLayoutUnique(
      vk::DescriptorSetLayoutCreateInfo( vk::DescriptorSetLayoutCreateFlags(), descriptorSetLayoutBinding ) );

    // create a PipelineLayout using that DescriptorSetLayout
    vk::UniquePipelineLayout pipelineLayout = device->createPipelineLayoutUnique(
      vk::PipelineLayoutCreateInfo( vk::PipelineLayoutCreateFlags(), *descriptorSetLayout ) );

    // Note: No need to explicitly destroy the layouts, as the corresponding destroy function is
    // called by the destructor of the UniqueDescriptorSetLayout or UniquePipelineLayout, respectively, 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;
}