mirror of
https://github.com/KhronosGroup/Vulkan-Hpp.git
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93 lines
4.1 KiB
C++
93 lines
4.1 KiB
C++
// Copyright(c) 2018, 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 : 09_InitDescriptorSet
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// Initialize a descriptor set
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#include <iostream>
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#include "vulkan/vulkan.hpp"
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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 = "09_InitDescriptorSet";
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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::ApplicationInfo appInfo(AppName, 1, EngineName, 1, VK_API_VERSION_1_1);
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vk::InstanceCreateInfo instanceCreateInfo({}, &appInfo);
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vk::UniqueInstance instance = vk::createInstanceUnique(instanceCreateInfo);
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std::vector<vk::PhysicalDevice> physicalDevices = instance->enumeratePhysicalDevices();
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assert(!physicalDevices.empty());
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// determine a queueFamilyIndex that supports graphics
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std::vector<vk::QueueFamilyProperties> queueFamilyProperties = physicalDevices[0].getQueueFamilyProperties();
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size_t graphicsQueueFamilyIndex = std::distance(queueFamilyProperties.begin(),
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std::find_if(queueFamilyProperties.begin(),
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queueFamilyProperties.end(),
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[](vk::QueueFamilyProperties const& qfp) { return qfp.queueFlags & vk::QueueFlagBits::eGraphics; }));
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// create a device
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float queuePriority = 0.0f;
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vk::DeviceQueueCreateInfo deviceQueueCreateInfo({}, static_cast<uint32_t>(graphicsQueueFamilyIndex), 1, &queuePriority);
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vk::UniqueDevice device = physicalDevices[0].createDeviceUnique(vk::DeviceCreateInfo({}, 1, &deviceQueueCreateInfo, 0, nullptr));
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glm::mat4x4 projection = glm::perspective(glm::radians(45.0f), 1.0f, 0.1f, 100.0f);
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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 model = glm::mat4x4(1.0f);
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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 !
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glm::mat4x4 mvpc = clip * projection * view * model;
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vk::UniqueBuffer buffer = device->createBufferUnique(vk::BufferCreateInfo(vk::BufferCreateFlags(), sizeof(mvpc), vk::BufferUsageFlagBits::eUniformBuffer));
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// create a DescriptorSetLayout
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vk::DescriptorSetLayoutBinding descriptorSetLayoutBinding(0, vk::DescriptorType::eUniformBuffer, 1, vk::ShaderStageFlagBits::eVertex);
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vk::UniqueDescriptorSetLayout descriptorSetLayout = device->createDescriptorSetLayoutUnique(vk::DescriptorSetLayoutCreateInfo({}, 1, &descriptorSetLayoutBinding));
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/* VULKAN_HPP_KEY_START */
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// create a descriptor pool
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vk::DescriptorPoolSize poolSize(vk::DescriptorType::eUniformBuffer, 1);
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vk::UniqueDescriptorPool descriptorPool = device->createDescriptorPoolUnique(vk::DescriptorPoolCreateInfo(vk::DescriptorPoolCreateFlags(), 1, 1, &poolSize));
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// allocate a descriptor set
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std::vector<vk::UniqueDescriptorSet> descriptorSets = device->allocateDescriptorSetsUnique(vk::DescriptorSetAllocateInfo(descriptorPool.get(), 1, &descriptorSetLayout.get()));
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vk::DescriptorBufferInfo descriptorBufferInfo(buffer.get(), 0, sizeof(glm::mat4x4));
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device->updateDescriptorSets(vk::WriteDescriptorSet(descriptorSets[0].get(), 0, 0, 1, vk::DescriptorType::eUniformBuffer, nullptr, &descriptorBufferInfo), {});
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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::runtime_error err)
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{
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std::cout << "std::runtime_error: " << 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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