src/Vulkan/VkPipelineLayout.cpp

   1 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //    http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include "VkPipelineLayout.hpp"
  16 #include <cstring>
  17
  18 namespace vk
  19 {
  20
  21 PipelineLayout::PipelineLayout(const VkPipelineLayoutCreateInfo* pCreateInfo, void* mem)
  22         : setLayoutCount(pCreateInfo->setLayoutCount), pushConstantRangeCount(pCreateInfo->pushConstantRangeCount)
  23 {
  24         char* hostMem = reinterpret_cast<char*>(mem);
  25
  26         size_t setLayoutsSize = pCreateInfo->setLayoutCount * sizeof(DescriptorSetLayout*);
  27         setLayouts = reinterpret_cast<DescriptorSetLayout**>(hostMem);
  28         memcpy(setLayouts, pCreateInfo->pSetLayouts, setLayoutsSize); // Assumes Cast(VkDescriptorSetLayout) is nothing but a cast
  29         hostMem += setLayoutsSize;
  30
  31         size_t pushConstantRangesSize = pCreateInfo->pushConstantRangeCount * sizeof(VkPushConstantRange);
  32         pushConstantRanges = reinterpret_cast<VkPushConstantRange*>(hostMem);
  33         memcpy(pushConstantRanges, pCreateInfo->pPushConstantRanges, pushConstantRangesSize);
  34 }
  35
  36 void PipelineLayout::destroy(const VkAllocationCallbacks* pAllocator)
  37 {
  38         vk::deallocate(setLayouts, pAllocator); // pushConstantRanges are in the same allocation
  39 }
  40
  41 size_t PipelineLayout::ComputeRequiredAllocationSize(const VkPipelineLayoutCreateInfo* pCreateInfo)
  42 {
  43         return (pCreateInfo->setLayoutCount * sizeof(DescriptorSetLayout*)) +
  44                (pCreateInfo->pushConstantRangeCount * sizeof(VkPushConstantRange));
  45 }
  46
  47 size_t PipelineLayout::getNumDescriptorSets() const
  48 {
  49         return setLayoutCount;
  50 }
  51
  52 size_t PipelineLayout::getBindingOffset(size_t descriptorSet, size_t binding) const
  53 {
  54         ASSERT(descriptorSet < setLayoutCount);
  55         return setLayouts[descriptorSet]->getBindingOffset(binding);
  56 }
  57
  58 } // namespace vk