.. _program_listing_file_PrismEngine_src_descriptorSet.cpp:

Program Listing for File descriptorSet.cpp
==========================================

|exhale_lsh| :ref:`Return to documentation for file <file_PrismEngine_src_descriptorSet.cpp>` (``PrismEngine\src\descriptorSet.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "descriptorSet.h"
   
   void prism::PGC::DescriptorSet::init(PGC::utils::Context* context, PGC::utils::Settings* settings)
   {
       this->context = context;
       this->settings = settings;
       create();
   }
   
   prism::PGC::DescriptorSet::~DescriptorSet()
   {
   
   }
   
   void prism::PGC::DescriptorSet::cleanup()
   {
   
   }
   
   void prism::PGC::DescriptorSet::create()
   {
       std::vector<VkDescriptorSetLayout> layouts(context->MAX_FRAMES_IN_FLIGHT, context->descriptorSetLayout);
       VkDescriptorSetAllocateInfo allocInfo{};
       allocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
       allocInfo.descriptorPool = context->descriptorPool;
       allocInfo.descriptorSetCount = static_cast<uint32_t>(context->MAX_FRAMES_IN_FLIGHT);
       allocInfo.pSetLayouts = layouts.data();
   
       context->descriptorSets.resize(context->MAX_FRAMES_IN_FLIGHT);
       if (vkAllocateDescriptorSets(context->device, &allocInfo, context->descriptorSets.data()) != VK_SUCCESS) {
           throw std::runtime_error("failed to allocate descriptor sets!");
       }
   
       for (size_t i = 0; i < context->MAX_FRAMES_IN_FLIGHT; i++) {
           // CameraUBO (статический)
           VkDescriptorBufferInfo cameraBufferInfo{};
           cameraBufferInfo.buffer = context->uniformBuffers[i].camera;
           cameraBufferInfo.offset = 0;
           cameraBufferInfo.range = sizeof(CameraUBO);
   
           // ObjectUBO (динамический)
           VkDescriptorBufferInfo objectBufferInfo{};
           objectBufferInfo.buffer = context->uniformBuffers[i].object;
           objectBufferInfo.offset = 0; // Смещение будет устанавливаться при binding'е
           objectBufferInfo.range = sizeof(ObjectUBO);
   
   
           std::array<VkWriteDescriptorSet, 2> descriptorWrites{};
   
           // Camera UBO (binding 0) - статический
           descriptorWrites[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
           descriptorWrites[0].dstSet = context->descriptorSets[i];
           descriptorWrites[0].dstBinding = 0;
           descriptorWrites[0].dstArrayElement = 0;
           descriptorWrites[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
           descriptorWrites[0].descriptorCount = 1;
           descriptorWrites[0].pBufferInfo = &cameraBufferInfo;
   
           // Object UBO (binding 1) - динамический (изменили binding с 2 на 1)
           descriptorWrites[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
           descriptorWrites[1].dstSet = context->descriptorSets[i];
           descriptorWrites[1].dstBinding = 1;
           descriptorWrites[1].dstArrayElement = 0;
           descriptorWrites[1].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC;
           descriptorWrites[1].descriptorCount = 1;
           descriptorWrites[1].pBufferInfo = &objectBufferInfo;
   
           vkUpdateDescriptorSets(context->device, static_cast<uint32_t>(descriptorWrites.size()), descriptorWrites.data(), 0, nullptr);
       }
   }