Function main

RAII_Samples/09_InitDescriptorSet/09_InitDescriptorSet.cpp:27–81

static char const * EngineName = "Vulkan.hpp";

int main()
{
  try
  {
    vk::raii::Context  context;
    vk::raii::Instance instance = vk::raii::su::makeInstance( context, AppName, EngineName, {}, vk::su::getInstanceExtensions() );
#if !defined( NDEBUG )
    vk::raii::DebugUtilsMessengerEXT debugUtilsMessenger( instance, vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
#endif
    vk::raii::PhysicalDevice physicalDevice = vk::raii::PhysicalDevices( instance ).front();

    uint32_t         graphicsQueueFamilyIndex = vk::su::findGraphicsQueueFamilyIndex( physicalDevice.getQueueFamilyProperties() );
    vk::raii::Device device                   = vk::raii::su::makeDevice( physicalDevice, graphicsQueueFamilyIndex );

    vk::raii::su::BufferData uniformBufferData( physicalDevice, device, sizeof( glm::mat4x4 ), vk::BufferUsageFlagBits::eUniformBuffer );
    glm::mat4x4              mvpcMatrix = vk::su::createModelViewProjectionClipMatrix( vk::Extent2D( 0, 0 ) );
    vk::raii::su::copyToDevice( uniformBufferData.deviceMemory, mvpcMatrix );

    vk::raii::DescriptorSetLayout descriptorSetLayout =
      vk::raii::su::makeDescriptorSetLayout( device, { { vk::DescriptorType::eUniformBuffer, 1, vk::ShaderStageFlagBits::eVertex } } );

    /* VULKAN_HPP_KEY_START */

    // create a descriptor pool
    vk::DescriptorPoolSize       poolSize( vk::DescriptorType::eUniformBuffer, 1 );
    vk::DescriptorPoolCreateInfo descriptorPoolCreateInfo( vk::DescriptorPoolCreateFlagBits::eFreeDescriptorSet, 1, poolSize );
    vk::raii::DescriptorPool     descriptorPool( device, descriptorPoolCreateInfo );

    // allocate a descriptor set
    vk::DescriptorSetAllocateInfo descriptorSetAllocateInfo( descriptorPool, *descriptorSetLayout );
    vk::raii::DescriptorSet       descriptorSet = std::move( vk::raii::DescriptorSets( device, descriptorSetAllocateInfo ).front() );

    vk::DescriptorBufferInfo descriptorBufferInfo( uniformBufferData.buffer, 0, sizeof( glm::mat4x4 ) );
    vk::WriteDescriptorSet   writeDescriptorSet( descriptorSet, 0, 0, vk::DescriptorType::eUniformBuffer, {}, descriptorBufferInfo );
    device.updateDescriptorSets( writeDescriptorSet, nullptr );

    /* 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;
}