// 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, 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 */

    vk::AttachmentDescription attachmentDescriptions[2];
    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, 0, nullptr, 1, &colorReference, nullptr, &depthReference);

    vk::UniqueRenderPass renderPass = device->createRenderPassUnique(vk::RenderPassCreateInfo(vk::RenderPassCreateFlags(), 2, attachmentDescriptions, 1, &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 */

#if defined(VK_USE_PLATFORM_WIN32_KHR)
    DestroyWindow(surfaceData.window);
#else
#pragma error "unhandled platform"
#endif
  }
  catch (vk::SystemError err)
  {
    std::cout << "vk::SystemError: " << err.what() << std::endl;
    exit(-1);
  }
  catch (std::runtime_error err)
  {
    std::cout << "std::runtime_error: " << err.what() << std::endl;
    exit(-1);
  }
  catch (...)
  {
    std::cout << "unknown error\n";
    exit(-1);
  }
  return 0;
}