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// Copyright 2018 The SwiftShader Authors. 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.
#include "VkPipelineLayout.hpp"
#include <cstring>
namespace vk
{
PipelineLayout::PipelineLayout(const VkPipelineLayoutCreateInfo* pCreateInfo, void* mem)
: setLayoutCount(pCreateInfo->setLayoutCount), pushConstantRangeCount(pCreateInfo->pushConstantRangeCount)
{
char* hostMem = reinterpret_cast<char*>(mem);
size_t setLayoutsSize = pCreateInfo->setLayoutCount * sizeof(DescriptorSetLayout*);
setLayouts = reinterpret_cast<DescriptorSetLayout**>(hostMem);
memcpy(setLayouts, pCreateInfo->pSetLayouts, setLayoutsSize); // Assumes Cast(VkDescriptorSetLayout) is nothing but a cast
hostMem += setLayoutsSize;
size_t pushConstantRangesSize = pCreateInfo->pushConstantRangeCount * sizeof(VkPushConstantRange);
pushConstantRanges = reinterpret_cast<VkPushConstantRange*>(hostMem);
memcpy(pushConstantRanges, pCreateInfo->pPushConstantRanges, pushConstantRangesSize);
hostMem += pushConstantRangesSize;
dynamicOffsetBases = reinterpret_cast<uint32_t*>(hostMem);
uint32_t dynamicOffsetBase = 0;
for (uint32_t i = 0; i < setLayoutCount; i++)
{
ASSERT_OR_RETURN(dynamicOffsetBase < MAX_DESCRIPTOR_SET_COMBINED_BUFFERS_DYNAMIC);
dynamicOffsetBases[i] = dynamicOffsetBase;
dynamicOffsetBase += setLayouts[i]->getDynamicDescriptorCount();
}
}
void PipelineLayout::destroy(const VkAllocationCallbacks* pAllocator)
{
vk::deallocate(setLayouts, pAllocator); // pushConstantRanges are in the same allocation
}
size_t PipelineLayout::ComputeRequiredAllocationSize(const VkPipelineLayoutCreateInfo* pCreateInfo)
{
return (pCreateInfo->setLayoutCount * sizeof(DescriptorSetLayout*)) +
(pCreateInfo->pushConstantRangeCount * sizeof(VkPushConstantRange)) +
(pCreateInfo->setLayoutCount * sizeof(uint32_t)); // dynamicOffsetBases
}
size_t PipelineLayout::getNumDescriptorSets() const
{
return setLayoutCount;
}
DescriptorSetLayout const* PipelineLayout::getDescriptorSetLayout(size_t descriptorSet) const
{
ASSERT(descriptorSet < setLayoutCount);
return setLayouts[descriptorSet];
}
uint32_t PipelineLayout::getDynamicOffsetBase(size_t descriptorSet) const
{
ASSERT(descriptorSet < setLayoutCount);
return dynamicOffsetBases[descriptorSet];
}
} // namespace vk