Vulkan-Hpp/samples/07_InitUniformBuffer/07_InitUniformBuffer.cpp

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// 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 : 07_InitUniformBuffer
// Initialize a uniform buffer
#if defined( _MSC_VER )
# pragma warning( disable : 4127 ) // disable warning 4127: conditional expression is constant
# pragma warning( disable : 4201 ) // disable warning C4201: nonstandard extension used: nameless struct/union; needed
// to get glm/detail/type_vec?.hpp without warnings
#elif defined( __GNUC__ )
// don't know how to switch off that warning here
#else
// unknow compiler... just ignore the warnings for yourselves ;)
#endif
#include "../utils/utils.hpp"
#include <iostream>
#define GLM_FORCE_RADIANS
#include <glm/gtc/matrix_transform.hpp>
static char const * AppName = "07_InitUniformBuffer";
static char const * EngineName = "Vulkan.hpp";
int main( int /*argc*/, char ** /*argv*/ )
{
try
{
vk::Instance instance = vk::su::createInstance( AppName, EngineName );
#if !defined( NDEBUG )
vk::DebugUtilsMessengerEXT debugUtilsMessenger = instance.createDebugUtilsMessengerEXT( vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
#endif
vk::PhysicalDevice physicalDevice = instance.enumeratePhysicalDevices().front();
uint32_t graphicsQueueFamilyIndex = vk::su::findGraphicsQueueFamilyIndex( physicalDevice.getQueueFamilyProperties() );
vk::Device device = vk::su::createDevice( physicalDevice, graphicsQueueFamilyIndex );
/* VULKAN_HPP_KEY_START */
glm::mat4x4 model = glm::mat4x4( 1.0f );
glm::mat4x4 view = glm::lookAt( glm::vec3( -5.0f, 3.0f, -10.0f ), glm::vec3( 0.0f, 0.0f, 0.0f ), glm::vec3( 0.0f, -1.0f, 0.0f ) );
glm::mat4x4 projection = glm::perspective( glm::radians( 45.0f ), 1.0f, 0.1f, 100.0f );
// clang-format off
glm::mat4x4 clip = glm::mat4x4( 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.0f, 0.0f, 0.5f, 1.0f ); // vulkan clip space has inverted y and half z !
// clang-format on
glm::mat4x4 mvpc = clip * projection * view * model;
vk::Buffer uniformDataBuffer =
device.createBuffer( vk::BufferCreateInfo( vk::BufferCreateFlags(), sizeof( mvpc ), vk::BufferUsageFlagBits::eUniformBuffer ) );
vk::MemoryRequirements memoryRequirements = device.getBufferMemoryRequirements( uniformDataBuffer );
uint32_t typeIndex = vk::su::findMemoryType( physicalDevice.getMemoryProperties(),
memoryRequirements.memoryTypeBits,
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent );
vk::DeviceMemory uniformDataMemory = device.allocateMemory( vk::MemoryAllocateInfo( memoryRequirements.size, typeIndex ) );
uint8_t * pData = static_cast<uint8_t *>( device.mapMemory( uniformDataMemory, 0, memoryRequirements.size ) );
memcpy( pData, &mvpc, sizeof( mvpc ) );
device.unmapMemory( uniformDataMemory );
device.bindBufferMemory( uniformDataBuffer, uniformDataMemory, 0 );
// free device memory and destroy buffer
device.freeMemory( uniformDataMemory );
device.destroyBuffer( uniformDataBuffer );
/* VULKAN_HPP_KEY_END */
device.destroy();
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#if !defined( NDEBUG )
instance.destroyDebugUtilsMessengerEXT( debugUtilsMessenger );
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#endif
instance.destroy();
}
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;
}