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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.
#ifndef VK_DESCRIPTOR_SET_LAYOUT_HPP_
#define VK_DESCRIPTOR_SET_LAYOUT_HPP_
#include "VkObject.hpp"
#include "Vulkan/VkSampler.hpp"
#include "Vulkan/VkImageView.hpp"
#include "Device/Sampler.hpp"
namespace vk
{
class DescriptorSet;
// TODO(b/129523279): Move to the Device or Pipeline layer.
struct alignas(16) SampledImageDescriptor
{
void updateSampler(const vk::Sampler *sampler);
// TODO(b/129523279): Minimize to the data actually needed.
const vk::Sampler *sampler;
const vk::ImageView *imageView;
alignas(16) sw::Texture texture;
};
struct alignas(16) StorageImageDescriptor
{
void *ptr;
VkExtent3D extent;
int rowPitchBytes;
int slicePitchBytes;
int arrayLayers;
int sizeInBytes;
};
struct alignas(16) BufferDescriptor
{
void *ptr;
int sizeInBytes; // intended size of the bound region -- slides along with dynamic offsets
int robustnessSize; // total accessible size from static offset -- does not move with dynamic offset
};
class DescriptorSetLayout : public Object<DescriptorSetLayout, VkDescriptorSetLayout>
{
public:
DescriptorSetLayout(const VkDescriptorSetLayoutCreateInfo* pCreateInfo, void* mem);
~DescriptorSetLayout() = delete;
void destroy(const VkAllocationCallbacks* pAllocator);
static size_t ComputeRequiredAllocationSize(const VkDescriptorSetLayoutCreateInfo* pCreateInfo);
static size_t GetDescriptorSize(VkDescriptorType type);
static void WriteDescriptorSet(const VkWriteDescriptorSet& descriptorWrites);
static void CopyDescriptorSet(const VkCopyDescriptorSet& descriptorCopies);
static void WriteDescriptorSet(DescriptorSet *dstSet, VkDescriptorUpdateTemplateEntry const &entry, char const *src);
void initialize(VkDescriptorSet descriptorSet);
// Returns the total size of the descriptor set in bytes.
size_t getDescriptorSetAllocationSize() const;
// Returns the number of bindings in the descriptor set.
size_t getBindingCount() const;
// Returns true iff the given binding exists.
bool hasBinding(uint32_t binding) const;
// Returns the byte offset from the base address of the descriptor set for
// the given binding and array element within that binding.
size_t getBindingOffset(uint32_t binding, size_t arrayElement) const;
// Returns the stride of an array of descriptors
size_t getBindingStride(uint32_t binding) const;
// Returns the number of descriptors across all bindings that are dynamic
// (see isBindingDynamic).
uint32_t getDynamicDescriptorCount() const;
// Returns the relative offset into the pipeline's dynamic offsets array for
// the given binding. This offset should be added to the base offset
// returned by PipelineLayout::getDynamicOffsetBase() to produce the
// starting index for dynamic descriptors.
uint32_t getDynamicDescriptorOffset(uint32_t binding) const;
// Returns true if the given binding is of type:
// VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC or
// VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC
bool isBindingDynamic(uint32_t binding) const;
// Returns the VkDescriptorSetLayoutBinding for the given binding.
VkDescriptorSetLayoutBinding const & getBindingLayout(uint32_t binding) const;
uint8_t* getOffsetPointer(DescriptorSet *descriptorSet, uint32_t binding, uint32_t arrayElement, uint32_t count, size_t* typeSize) const;
private:
size_t getDescriptorSetDataSize() const;
uint32_t getBindingIndex(uint32_t binding) const;
static bool isDynamic(VkDescriptorType type);
VkDescriptorSetLayoutCreateFlags flags;
uint32_t bindingCount;
VkDescriptorSetLayoutBinding* bindings;
size_t* bindingOffsets;
};
static inline DescriptorSetLayout* Cast(VkDescriptorSetLayout object)
{
return reinterpret_cast<DescriptorSetLayout*>(object);
}
} // namespace vk
#endif // VK_DESCRIPTOR_SET_LAYOUT_HPP_