| // 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 "VkDescriptorSetLayout.hpp" |
| #include <cstring> |
| |
| namespace |
| { |
| |
| static bool UsesImmutableSamplers(const VkDescriptorSetLayoutBinding& binding) |
| { |
| return (((binding.descriptorType == VK_DESCRIPTOR_TYPE_SAMPLER) || |
| (binding.descriptorType == VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER)) && |
| (binding.pImmutableSamplers != nullptr)); |
| } |
| |
| } |
| |
| namespace vk |
| { |
| |
| DescriptorSetLayout::DescriptorSetLayout(const VkDescriptorSetLayoutCreateInfo* pCreateInfo, void* mem) : |
| flags(pCreateInfo->flags), bindingCount(pCreateInfo->bindingCount), bindings(reinterpret_cast<VkDescriptorSetLayoutBinding*>(mem)) |
| { |
| char* host_memory = static_cast<char*>(mem) + bindingCount * sizeof(VkDescriptorSetLayoutBinding); |
| |
| for(uint32_t i = 0; i < bindingCount; i++) |
| { |
| bindings[i] = pCreateInfo->pBindings[i]; |
| if(UsesImmutableSamplers(bindings[i])) |
| { |
| size_t immutableSamplersSize = bindings[i].descriptorCount * sizeof(VkSampler); |
| bindings[i].pImmutableSamplers = reinterpret_cast<const VkSampler*>(host_memory); |
| host_memory += immutableSamplersSize; |
| memcpy(const_cast<VkSampler*>(bindings[i].pImmutableSamplers), |
| pCreateInfo->pBindings[i].pImmutableSamplers, |
| immutableSamplersSize); |
| } |
| else |
| { |
| bindings[i].pImmutableSamplers = nullptr; |
| } |
| } |
| } |
| |
| void DescriptorSetLayout::destroy(const VkAllocationCallbacks* pAllocator) |
| { |
| for(uint32_t i = 0; i < bindingCount; i++) |
| { |
| if(UsesImmutableSamplers(bindings[i])) |
| { |
| // A single allocation is used for all immutable samplers, so only a single deallocation is needed. |
| vk::deallocate(const_cast<VkSampler*>(bindings[i].pImmutableSamplers), pAllocator); |
| break; |
| } |
| } |
| |
| vk::deallocate(bindings, pAllocator); |
| } |
| |
| size_t DescriptorSetLayout::ComputeRequiredAllocationSize(const VkDescriptorSetLayoutCreateInfo* pCreateInfo) |
| { |
| size_t allocationSize = pCreateInfo->bindingCount * sizeof(VkDescriptorSetLayoutBinding); |
| |
| for(uint32_t i = 0; i < pCreateInfo->bindingCount; i++) |
| { |
| if(UsesImmutableSamplers(pCreateInfo->pBindings[i])) |
| { |
| allocationSize += pCreateInfo->pBindings[i].descriptorCount * sizeof(VkSampler); |
| } |
| } |
| |
| return allocationSize; |
| } |
| |
| size_t DescriptorSetLayout::GetDescriptorSize(VkDescriptorType type) |
| { |
| switch(type) |
| { |
| case VK_DESCRIPTOR_TYPE_SAMPLER: |
| case VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER: |
| case VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE: |
| case VK_DESCRIPTOR_TYPE_STORAGE_IMAGE: |
| case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER: |
| case VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER: |
| case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER: |
| case VK_DESCRIPTOR_TYPE_STORAGE_BUFFER: |
| case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC: |
| case VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC: |
| case VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT: |
| return sizeof(void*); // FIXME(b/123244275) : Compute actual required size for each desciptor type |
| default: |
| UNIMPLEMENTED("Unsupported Descriptor Type"); |
| } |
| |
| return 0; |
| } |
| |
| size_t DescriptorSetLayout::getSize() const |
| { |
| size_t size = 0; |
| for(uint32_t i = 0; i < bindingCount; i++) |
| { |
| size += bindings[i].descriptorCount * GetDescriptorSize(bindings[i].descriptorType); |
| } |
| return size; |
| } |
| |
| } // namespace vk |