| // Copyright 2018 The Dawn Authors |
| // |
| // 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. |
| |
| #ifndef DAWNNATIVE_VULKAN_BINDGROUPLAYOUTVK_H_ |
| #define DAWNNATIVE_VULKAN_BINDGROUPLAYOUTVK_H_ |
| |
| #include "dawn/native/BindGroupLayout.h" |
| |
| #include "dawn/common/SlabAllocator.h" |
| #include "dawn/common/vulkan_platform.h" |
| |
| #include <vector> |
| |
| namespace dawn::native::vulkan { |
| |
| class BindGroup; |
| struct DescriptorSetAllocation; |
| class DescriptorSetAllocator; |
| class Device; |
| |
| VkDescriptorType VulkanDescriptorType(const BindingInfo& bindingInfo); |
| |
| // In Vulkan descriptor pools have to be sized to an exact number of descriptors. This means |
| // it's hard to have something where we can mix different types of descriptor sets because |
| // we don't know if their vector of number of descriptors will be similar. |
| // |
| // That's why that in addition to containing the VkDescriptorSetLayout to create |
| // VkDescriptorSets for its bindgroups, the layout also acts as an allocator for the descriptor |
| // sets. |
| // |
| // The allocations is done with one pool per descriptor set, which is inefficient, but at least |
| // the pools are reused when no longer used. Minimizing the number of descriptor pool allocation |
| // is important because creating them can incur GPU memory allocation which is usually an |
| // expensive syscall. |
| class BindGroupLayout final : public BindGroupLayoutBase { |
| public: |
| static ResultOrError<Ref<BindGroupLayout>> Create( |
| Device* device, |
| const BindGroupLayoutDescriptor* descriptor, |
| PipelineCompatibilityToken pipelineCompatibilityToken); |
| |
| BindGroupLayout(DeviceBase* device, |
| const BindGroupLayoutDescriptor* descriptor, |
| PipelineCompatibilityToken pipelineCompatibilityToken); |
| |
| VkDescriptorSetLayout GetHandle() const; |
| |
| ResultOrError<Ref<BindGroup>> AllocateBindGroup(Device* device, |
| const BindGroupDescriptor* descriptor); |
| void DeallocateBindGroup(BindGroup* bindGroup, |
| DescriptorSetAllocation* descriptorSetAllocation); |
| |
| private: |
| ~BindGroupLayout() override; |
| MaybeError Initialize(); |
| void DestroyImpl() override; |
| |
| // Dawn API |
| void SetLabelImpl() override; |
| |
| VkDescriptorSetLayout mHandle = VK_NULL_HANDLE; |
| |
| SlabAllocator<BindGroup> mBindGroupAllocator; |
| Ref<DescriptorSetAllocator> mDescriptorSetAllocator; |
| }; |
| |
| } // namespace dawn::native::vulkan |
| |
| #endif // DAWNNATIVE_VULKAN_BINDGROUPLAYOUTVK_H_ |