src/Vulkan/VkDescriptorUpdateTemplate.cpp

// 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 "VkDescriptorUpdateTemplate.hpp"
#include "VkDescriptorSet.hpp"
#include "VkDescriptorSetLayout.hpp"
#include <cstring>

namespace vk {

DescriptorUpdateTemplate::DescriptorUpdateTemplate(const VkDescriptorUpdateTemplateCreateInfo *pCreateInfo, void *mem)
    : descriptorUpdateEntryCount(pCreateInfo->descriptorUpdateEntryCount)
    , descriptorUpdateEntries(reinterpret_cast<VkDescriptorUpdateTemplateEntry *>(mem))
    , descriptorSetLayout(vk::Cast(pCreateInfo->descriptorSetLayout))
{
	for(uint32_t i = 0; i < descriptorUpdateEntryCount; i++)
	{
		descriptorUpdateEntries[i] = pCreateInfo->pDescriptorUpdateEntries[i];
	}
}

size_t DescriptorUpdateTemplate::ComputeRequiredAllocationSize(const VkDescriptorUpdateTemplateCreateInfo *info)
{
	return info->descriptorUpdateEntryCount * sizeof(VkDescriptorUpdateTemplateEntry);
}

void DescriptorUpdateTemplate::updateDescriptorSet(Device *device, VkDescriptorSet vkDescriptorSet, const void *pData)
{

	DescriptorSet *descriptorSet = vk::Cast(vkDescriptorSet);

	for(uint32_t i = 0; i < descriptorUpdateEntryCount; i++)
	{
		DescriptorSetLayout::WriteDescriptorSet(device, descriptorSet, descriptorUpdateEntries[i],
		                                        reinterpret_cast<char const *>(pData));
	}
}

}  // namespace vk