mirror of
https://github.com/KhronosGroup/Vulkan-Hpp
synced 2024-09-19 14:19:55 +00:00
104 lines
4.4 KiB
C++
104 lines
4.4 KiB
C++
// Copyright(c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// VulkanHpp Samples : 07_InitUniformBufferRAII
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// Initialize a uniform buffer
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#if defined( _MSC_VER )
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# pragma warning( disable : 4127 ) // disable warning 4127: conditional expression is constant
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# pragma warning( disable : 4201 ) // disable warning C4201: nonstandard extension used: nameless struct/union; needed
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// to get glm/detail/type_vec?.hpp without warnings
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#elif defined( __GNUC__ )
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// don't know how to switch off that warning here
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#else
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// unknow compiler... just ignore the warnings for yourselves ;)
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#endif
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#include "../utils/utils.hpp"
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#include <iostream>
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#define GLM_FORCE_RADIANS
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#include <glm/gtc/matrix_transform.hpp>
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static char const * AppName = "07_InitUniformBuffer";
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static char const * EngineName = "Vulkan.hpp";
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int main( int /*argc*/, char ** /*argv*/ )
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{
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try
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{
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vk::raii::Context context;
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vk::raii::Instance instance = vk::raii::su::makeInstance( context, AppName, EngineName, {}, vk::su::getInstanceExtensions() );
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#if !defined( NDEBUG )
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vk::raii::DebugUtilsMessengerEXT debugUtilsMessenger( instance, vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
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#endif
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vk::raii::PhysicalDevice physicalDevice = vk::raii::PhysicalDevices( instance ).front();
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uint32_t graphicsQueueFamilyIndex = vk::su::findGraphicsQueueFamilyIndex( physicalDevice.getQueueFamilyProperties() );
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vk::raii::Device device = vk::raii::su::makeDevice( physicalDevice, graphicsQueueFamilyIndex );
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/* VULKAN_HPP_KEY_START */
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glm::mat4x4 model = glm::mat4x4( 1.0f );
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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 ) );
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glm::mat4x4 projection = glm::perspective( glm::radians( 45.0f ), 1.0f, 0.1f, 100.0f );
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// clang-format off
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glm::mat4x4 clip = glm::mat4x4( 1.0f, 0.0f, 0.0f, 0.0f,
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0.0f, -1.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.5f, 0.0f,
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0.0f, 0.0f, 0.5f, 1.0f ); // vulkan clip space has inverted y and half z !
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// clang-format on
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glm::mat4x4 mvpc = clip * projection * view * model;
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vk::BufferCreateInfo bufferCreateInfo( {}, sizeof( mvpc ), vk::BufferUsageFlagBits::eUniformBuffer );
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vk::raii::Buffer uniformDataBuffer( device, bufferCreateInfo );
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vk::MemoryRequirements memoryRequirements = uniformDataBuffer.getMemoryRequirements();
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uint32_t typeIndex = vk::su::findMemoryType( physicalDevice.getMemoryProperties(),
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memoryRequirements.memoryTypeBits,
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vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent );
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vk::MemoryAllocateInfo memoryAllocateInfo( memoryRequirements.size, typeIndex );
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vk::raii::DeviceMemory uniformDataMemory( device, memoryAllocateInfo );
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uint8_t * pData = static_cast<uint8_t *>( uniformDataMemory.mapMemory( 0, memoryRequirements.size ) );
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memcpy( pData, &mvpc, sizeof( mvpc ) );
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uniformDataMemory.unmapMemory();
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uniformDataBuffer.bindMemory( uniformDataMemory, 0 );
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// while all vk::raii objects are automatically destroyed on scope leave, the Buffer should to be destroyed before the bound DeviceMemory
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// but the standard destruction order would destroy the DeviceMemory before the Buffer, so destroy the Buffer here
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uniformDataBuffer.clear();
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/* VULKAN_HPP_KEY_END */
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}
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catch ( vk::SystemError & err )
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{
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std::cout << "vk::SystemError: " << err.what() << std::endl;
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exit( -1 );
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}
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catch ( std::exception & err )
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{
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std::cout << "std::exception: " << err.what() << std::endl;
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exit( -1 );
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}
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catch ( ... )
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{
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std::cout << "unknown error\n";
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exit( -1 );
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}
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return 0;
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}
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