src/dawn_native/PipelineLayout.cpp - dawn - Git at Google

 // Copyright 2017 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.

 #include "dawn_native/PipelineLayout.h"

 #include "common/Assert.h"
 #include "common/BitSetIterator.h"
 #include "common/HashUtils.h"
 #include "dawn_native/BindGroupLayout.h"
 #include "dawn_native/Device.h"
 #include "dawn_native/ShaderModule.h"

 namespace dawn_native {

     namespace {

         bool InferredBindGroupLayoutEntriesCompatible(const BindGroupLayoutEntry& lhs,
                                                       const BindGroupLayoutEntry& rhs) {
             // Minimum buffer binding size excluded because we take the maximum seen across stages
             return lhs.binding == rhs.binding && lhs.visibility == rhs.visibility &&
                    lhs.type == rhs.type && lhs.hasDynamicOffset == rhs.hasDynamicOffset &&
                    lhs.multisampled == rhs.multisampled && lhs.viewDimension == rhs.viewDimension &&
                    lhs.textureComponentType == rhs.textureComponentType;
         }

         wgpu::ShaderStage GetShaderStageVisibilityWithBindingType(wgpu::BindingType bindingType) {
             // TODO(jiawei.shao@intel.com): support read-only and read-write storage textures.
             switch (bindingType) {
                 case wgpu::BindingType::StorageBuffer:
                 case wgpu::BindingType::WriteonlyStorageTexture:
                     return wgpu::ShaderStage::Fragment | wgpu::ShaderStage::Compute;

                 case wgpu::BindingType::StorageTexture:
                     UNREACHABLE();
                     return wgpu::ShaderStage::None;

                 case wgpu::BindingType::UniformBuffer:
                 case wgpu::BindingType::ReadonlyStorageBuffer:
                 case wgpu::BindingType::Sampler:
                 case wgpu::BindingType::ComparisonSampler:
                 case wgpu::BindingType::SampledTexture:
                 case wgpu::BindingType::ReadonlyStorageTexture:
                     return wgpu::ShaderStage::Vertex | wgpu::ShaderStage::Fragment |
                            wgpu::ShaderStage::Compute;
             }

             return {};
         }

     }  // anonymous namespace

     MaybeError ValidatePipelineLayoutDescriptor(DeviceBase* device,
                                                 const PipelineLayoutDescriptor* descriptor) {
         if (descriptor->nextInChain != nullptr) {
             return DAWN_VALIDATION_ERROR("nextInChain must be nullptr");
         }

         if (descriptor->bindGroupLayoutCount > kMaxBindGroups) {
             return DAWN_VALIDATION_ERROR("too many bind group layouts");
         }

         uint32_t totalDynamicUniformBufferCount = 0;
         uint32_t totalDynamicStorageBufferCount = 0;
         for (uint32_t i = 0; i < descriptor->bindGroupLayoutCount; ++i) {
             DAWN_TRY(device->ValidateObject(descriptor->bindGroupLayouts[i]));
             totalDynamicUniformBufferCount +=
                 descriptor->bindGroupLayouts[i]->GetDynamicUniformBufferCount();
             totalDynamicStorageBufferCount +=
                 descriptor->bindGroupLayouts[i]->GetDynamicStorageBufferCount();
         }

         if (totalDynamicUniformBufferCount > kMaxDynamicUniformBufferCount) {
             return DAWN_VALIDATION_ERROR("too many dynamic uniform buffers in pipeline layout");
         }

         if (totalDynamicStorageBufferCount > kMaxDynamicStorageBufferCount) {
             return DAWN_VALIDATION_ERROR("too many dynamic storage buffers in pipeline layout");
         }

         return {};
     }

     // PipelineLayoutBase

     PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device,
                                            const PipelineLayoutDescriptor* descriptor)
         : CachedObject(device) {
         ASSERT(descriptor->bindGroupLayoutCount <= kMaxBindGroups);
         for (BindGroupIndex group(0); group < BindGroupIndex(descriptor->bindGroupLayoutCount);
              ++group) {
             mBindGroupLayouts[group] = descriptor->bindGroupLayouts[static_cast<uint32_t>(group)];
             mMask.set(group);
         }
     }

     PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device, ObjectBase::ErrorTag tag)
         : CachedObject(device, tag) {
     }

     PipelineLayoutBase::~PipelineLayoutBase() {
         // Do not uncache the actual cached object if we are a blueprint
         if (IsCachedReference()) {
             GetDevice()->UncachePipelineLayout(this);
         }
     }

     // static
     PipelineLayoutBase* PipelineLayoutBase::MakeError(DeviceBase* device) {
         return new PipelineLayoutBase(device, ObjectBase::kError);
     }

     // static
     ResultOrError<PipelineLayoutBase*> PipelineLayoutBase::CreateDefault(
         DeviceBase* device,
         const ShaderModuleBase* const* modules,
         uint32_t count) {
         ASSERT(count > 0);

         // Data which BindGroupLayoutDescriptor will point to for creation
         ityp::array<BindGroupIndex,
                     ityp::array<BindingIndex, BindGroupLayoutEntry, kMaxBindingsPerGroup>,
                     kMaxBindGroups>
             entryData = {};

         // A map of bindings to the index in |entryData|
         ityp::array<BindGroupIndex, std::map<BindingNumber, BindingIndex>, kMaxBindGroups>
             usedBindingsMap = {};

         // A counter of how many bindings we've populated in |entryData|
         ityp::array<BindGroupIndex, BindingIndex, kMaxBindGroups> entryCounts = {};

         BindGroupIndex bindGroupLayoutCount(0);
         for (uint32_t moduleIndex = 0; moduleIndex < count; ++moduleIndex) {
             const ShaderModuleBase* module = modules[moduleIndex];
             const ShaderModuleBase::ModuleBindingInfo& info = module->GetBindingInfo();

             for (BindGroupIndex group(0); group < info.size(); ++group) {
                 for (const auto& it : info[group]) {
                     BindingNumber bindingNumber = it.first;
                     const ShaderModuleBase::ShaderBindingInfo& bindingInfo = it.second;

                     BindGroupLayoutEntry bindingSlot;
                     bindingSlot.binding = static_cast<uint32_t>(bindingNumber);

                     DAWN_TRY(ValidateBindingTypeWithShaderStageVisibility(
                         bindingInfo.type, StageBit(module->GetExecutionModel())));
                     DAWN_TRY(ValidateStorageTextureFormat(device, bindingInfo.type,
                                                           bindingInfo.storageTextureFormat));
                     DAWN_TRY(ValidateStorageTextureViewDimension(bindingInfo.type,
                                                                  bindingInfo.viewDimension));

                     if (bindingInfo.multisampled) {
                         DAWN_TRY(ValidateBindingCanBeMultisampled(bindingInfo.type,
                                                                   bindingInfo.viewDimension));
                     }

                     bindingSlot.visibility =
                         GetShaderStageVisibilityWithBindingType(bindingInfo.type);

                     bindingSlot.type = bindingInfo.type;
                     bindingSlot.hasDynamicOffset = false;
                     bindingSlot.multisampled = bindingInfo.multisampled;
                     bindingSlot.viewDimension = bindingInfo.viewDimension;
                     bindingSlot.textureComponentType =
                         Format::FormatTypeToTextureComponentType(bindingInfo.textureComponentType);
                     bindingSlot.storageTextureFormat = bindingInfo.storageTextureFormat;
                     bindingSlot.minBufferBindingSize = bindingInfo.minBufferBindingSize;

                     {
                         const auto& it = usedBindingsMap[group].find(bindingNumber);
                         if (it != usedBindingsMap[group].end()) {
                             BindGroupLayoutEntry* existingEntry = &entryData[group][it->second];

                             // Check if any properties are incompatible with existing entry
                             // If compatible, we will merge some properties
                             if (!InferredBindGroupLayoutEntriesCompatible(*existingEntry,
                                                                           bindingSlot)) {
                                 return DAWN_VALIDATION_ERROR(
                                     "Duplicate binding in default pipeline layout initialization "
                                     "not compatible with previous declaration");
                             }

                             // Use the max |minBufferBindingSize| we find
                             existingEntry->minBufferBindingSize =
                                 std::max(existingEntry->minBufferBindingSize,
                                          bindingSlot.minBufferBindingSize);

                             // Already used slot, continue
                             continue;
                         }
                     }

                     BindingIndex currentBindingCount = entryCounts[group];
                     entryData[group][currentBindingCount] = bindingSlot;

                     usedBindingsMap[group][bindingNumber] = currentBindingCount;

                     entryCounts[group]++;

                     bindGroupLayoutCount =
                         std::max(bindGroupLayoutCount, group + BindGroupIndex(1));
                 }
             }
         }

         ityp::array<BindGroupIndex, BindGroupLayoutBase*, kMaxBindGroups> bindGroupLayouts = {};
         for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
             BindGroupLayoutDescriptor desc = {};
             desc.entries = entryData[group].data();
             desc.entryCount = static_cast<uint32_t>(entryCounts[group]);

             // We should never produce a bad descriptor.
             ASSERT(!ValidateBindGroupLayoutDescriptor(device, &desc).IsError());

             Ref<BindGroupLayoutBase> bgl;
             DAWN_TRY_ASSIGN(bgl, device->GetOrCreateBindGroupLayout(&desc));
             bindGroupLayouts[group] = bgl.Detach();
         }

         PipelineLayoutDescriptor desc = {};
         desc.bindGroupLayouts = bindGroupLayouts.data();
         desc.bindGroupLayoutCount = static_cast<uint32_t>(bindGroupLayoutCount);
         PipelineLayoutBase* pipelineLayout = device->CreatePipelineLayout(&desc);
         ASSERT(!pipelineLayout->IsError());

         // These bind group layouts are created internally and referenced by the pipeline layout.
         // Release the external refcount.
         for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
             if (bindGroupLayouts[group] != nullptr) {
                 bindGroupLayouts[group]->Release();
             }
         }

         for (uint32_t moduleIndex = 0; moduleIndex < count; ++moduleIndex) {
             ASSERT(modules[moduleIndex]
                        ->ValidateCompatibilityWithPipelineLayout(pipelineLayout)
                        .IsSuccess());
         }

         return pipelineLayout;
     }

     const BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(BindGroupIndex group) const {
         ASSERT(!IsError());
         ASSERT(group < kMaxBindGroupsTyped);
         ASSERT(mMask[group]);
         const BindGroupLayoutBase* bgl = mBindGroupLayouts[group].Get();
         ASSERT(bgl != nullptr);
         return bgl;
     }

     BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(BindGroupIndex group) {
         ASSERT(!IsError());
         ASSERT(group < kMaxBindGroupsTyped);
         ASSERT(mMask[group]);
         BindGroupLayoutBase* bgl = mBindGroupLayouts[group].Get();
         ASSERT(bgl != nullptr);
         return bgl;
     }

     const BindGroupLayoutMask& PipelineLayoutBase::GetBindGroupLayoutsMask() const {
         ASSERT(!IsError());
         return mMask;
     }

     BindGroupLayoutMask PipelineLayoutBase::InheritedGroupsMask(
         const PipelineLayoutBase* other) const {
         ASSERT(!IsError());
         return {(1 << static_cast<uint32_t>(GroupsInheritUpTo(other))) - 1u};
     }

     BindGroupIndex PipelineLayoutBase::GroupsInheritUpTo(const PipelineLayoutBase* other) const {
         ASSERT(!IsError());

         for (BindGroupIndex i(0); i < kMaxBindGroupsTyped; ++i) {
             if (!mMask[i] || mBindGroupLayouts[i].Get() != other->mBindGroupLayouts[i].Get()) {
                 return i;
             }
         }
         return kMaxBindGroupsTyped;
     }

     size_t PipelineLayoutBase::HashFunc::operator()(const PipelineLayoutBase* pl) const {
         size_t hash = Hash(pl->mMask);

         for (BindGroupIndex group : IterateBitSet(pl->mMask)) {
             HashCombine(&hash, pl->GetBindGroupLayout(group));
         }

         return hash;
     }

     bool PipelineLayoutBase::EqualityFunc::operator()(const PipelineLayoutBase* a,
                                                       const PipelineLayoutBase* b) const {
         if (a->mMask != b->mMask) {
             return false;
         }

         for (BindGroupIndex group : IterateBitSet(a->mMask)) {
             if (a->GetBindGroupLayout(group) != b->GetBindGroupLayout(group)) {
                 return false;
             }
         }

         return true;
     }

 }  // namespace dawn_native
	// Copyright 2017 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.

	#include "dawn_native/PipelineLayout.h"

	#include "common/Assert.h"
	#include "common/BitSetIterator.h"
	#include "common/HashUtils.h"
	#include "dawn_native/BindGroupLayout.h"
	#include "dawn_native/Device.h"
	#include "dawn_native/ShaderModule.h"

	namespace dawn_native {

	namespace {

	bool InferredBindGroupLayoutEntriesCompatible(const BindGroupLayoutEntry& lhs,
	const BindGroupLayoutEntry& rhs) {
	// Minimum buffer binding size excluded because we take the maximum seen across stages
	return lhs.binding == rhs.binding && lhs.visibility == rhs.visibility &&
	lhs.type == rhs.type && lhs.hasDynamicOffset == rhs.hasDynamicOffset &&
	lhs.multisampled == rhs.multisampled && lhs.viewDimension == rhs.viewDimension &&
	lhs.textureComponentType == rhs.textureComponentType;
	}

	wgpu::ShaderStage GetShaderStageVisibilityWithBindingType(wgpu::BindingType bindingType) {
	// TODO(jiawei.shao@intel.com): support read-only and read-write storage textures.
	switch (bindingType) {
	case wgpu::BindingType::StorageBuffer:
	case wgpu::BindingType::WriteonlyStorageTexture:
	return wgpu::ShaderStage::Fragment \| wgpu::ShaderStage::Compute;

	case wgpu::BindingType::StorageTexture:
	UNREACHABLE();
	return wgpu::ShaderStage::None;

	case wgpu::BindingType::UniformBuffer:
	case wgpu::BindingType::ReadonlyStorageBuffer:
	case wgpu::BindingType::Sampler:
	case wgpu::BindingType::ComparisonSampler:
	case wgpu::BindingType::SampledTexture:
	case wgpu::BindingType::ReadonlyStorageTexture:
	return wgpu::ShaderStage::Vertex \| wgpu::ShaderStage::Fragment \|
	wgpu::ShaderStage::Compute;
	}

	return {};
	}

	} // anonymous namespace

	MaybeError ValidatePipelineLayoutDescriptor(DeviceBase* device,
	const PipelineLayoutDescriptor* descriptor) {
	if (descriptor->nextInChain != nullptr) {
	return DAWN_VALIDATION_ERROR("nextInChain must be nullptr");
	}

	if (descriptor->bindGroupLayoutCount > kMaxBindGroups) {
	return DAWN_VALIDATION_ERROR("too many bind group layouts");
	}

	uint32_t totalDynamicUniformBufferCount = 0;
	uint32_t totalDynamicStorageBufferCount = 0;
	for (uint32_t i = 0; i < descriptor->bindGroupLayoutCount; ++i) {
	DAWN_TRY(device->ValidateObject(descriptor->bindGroupLayouts[i]));
	totalDynamicUniformBufferCount +=
	descriptor->bindGroupLayouts[i]->GetDynamicUniformBufferCount();
	totalDynamicStorageBufferCount +=
	descriptor->bindGroupLayouts[i]->GetDynamicStorageBufferCount();
	}

	if (totalDynamicUniformBufferCount > kMaxDynamicUniformBufferCount) {
	return DAWN_VALIDATION_ERROR("too many dynamic uniform buffers in pipeline layout");
	}

	if (totalDynamicStorageBufferCount > kMaxDynamicStorageBufferCount) {
	return DAWN_VALIDATION_ERROR("too many dynamic storage buffers in pipeline layout");
	}

	return {};
	}

	// PipelineLayoutBase

	PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device,
	const PipelineLayoutDescriptor* descriptor)
	: CachedObject(device) {
	ASSERT(descriptor->bindGroupLayoutCount <= kMaxBindGroups);
	for (BindGroupIndex group(0); group < BindGroupIndex(descriptor->bindGroupLayoutCount);
	++group) {
	mBindGroupLayouts[group] = descriptor->bindGroupLayouts[static_cast<uint32_t>(group)];
	mMask.set(group);
	}
	}

	PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device, ObjectBase::ErrorTag tag)
	: CachedObject(device, tag) {
	}

	PipelineLayoutBase::~PipelineLayoutBase() {
	// Do not uncache the actual cached object if we are a blueprint
	if (IsCachedReference()) {
	GetDevice()->UncachePipelineLayout(this);
	}
	}

	// static
	PipelineLayoutBase* PipelineLayoutBase::MakeError(DeviceBase* device) {
	return new PipelineLayoutBase(device, ObjectBase::kError);
	}

	// static
	ResultOrError<PipelineLayoutBase*> PipelineLayoutBase::CreateDefault(
	DeviceBase* device,
	const ShaderModuleBase* const* modules,
	uint32_t count) {
	ASSERT(count > 0);

	// Data which BindGroupLayoutDescriptor will point to for creation
	ityp::array<BindGroupIndex,
	ityp::array<BindingIndex, BindGroupLayoutEntry, kMaxBindingsPerGroup>,
	kMaxBindGroups>
	entryData = {};

	// A map of bindings to the index in \|entryData\|
	ityp::array<BindGroupIndex, std::map<BindingNumber, BindingIndex>, kMaxBindGroups>
	usedBindingsMap = {};

	// A counter of how many bindings we've populated in \|entryData\|
	ityp::array<BindGroupIndex, BindingIndex, kMaxBindGroups> entryCounts = {};

	BindGroupIndex bindGroupLayoutCount(0);
	for (uint32_t moduleIndex = 0; moduleIndex < count; ++moduleIndex) {
	const ShaderModuleBase* module = modules[moduleIndex];
	const ShaderModuleBase::ModuleBindingInfo& info = module->GetBindingInfo();

	for (BindGroupIndex group(0); group < info.size(); ++group) {
	for (const auto& it : info[group]) {
	BindingNumber bindingNumber = it.first;
	const ShaderModuleBase::ShaderBindingInfo& bindingInfo = it.second;

	BindGroupLayoutEntry bindingSlot;
	bindingSlot.binding = static_cast<uint32_t>(bindingNumber);

	DAWN_TRY(ValidateBindingTypeWithShaderStageVisibility(
	bindingInfo.type, StageBit(module->GetExecutionModel())));
	DAWN_TRY(ValidateStorageTextureFormat(device, bindingInfo.type,
	bindingInfo.storageTextureFormat));
	DAWN_TRY(ValidateStorageTextureViewDimension(bindingInfo.type,
	bindingInfo.viewDimension));

	if (bindingInfo.multisampled) {
	DAWN_TRY(ValidateBindingCanBeMultisampled(bindingInfo.type,
	bindingInfo.viewDimension));
	}

	bindingSlot.visibility =
	GetShaderStageVisibilityWithBindingType(bindingInfo.type);

	bindingSlot.type = bindingInfo.type;
	bindingSlot.hasDynamicOffset = false;
	bindingSlot.multisampled = bindingInfo.multisampled;
	bindingSlot.viewDimension = bindingInfo.viewDimension;
	bindingSlot.textureComponentType =
	Format::FormatTypeToTextureComponentType(bindingInfo.textureComponentType);
	bindingSlot.storageTextureFormat = bindingInfo.storageTextureFormat;
	bindingSlot.minBufferBindingSize = bindingInfo.minBufferBindingSize;

	{
	const auto& it = usedBindingsMap[group].find(bindingNumber);
	if (it != usedBindingsMap[group].end()) {
	BindGroupLayoutEntry* existingEntry = &entryData[group][it->second];

	// Check if any properties are incompatible with existing entry
	// If compatible, we will merge some properties
	if (!InferredBindGroupLayoutEntriesCompatible(*existingEntry,
	bindingSlot)) {
	return DAWN_VALIDATION_ERROR(
	"Duplicate binding in default pipeline layout initialization "
	"not compatible with previous declaration");
	}

	// Use the max \|minBufferBindingSize\| we find
	existingEntry->minBufferBindingSize =
	std::max(existingEntry->minBufferBindingSize,
	bindingSlot.minBufferBindingSize);

	// Already used slot, continue
	continue;
	}
	}

	BindingIndex currentBindingCount = entryCounts[group];
	entryData[group][currentBindingCount] = bindingSlot;

	usedBindingsMap[group][bindingNumber] = currentBindingCount;

	entryCounts[group]++;

	bindGroupLayoutCount =
	std::max(bindGroupLayoutCount, group + BindGroupIndex(1));
	}
	}
	}

	ityp::array<BindGroupIndex, BindGroupLayoutBase*, kMaxBindGroups> bindGroupLayouts = {};
	for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
	BindGroupLayoutDescriptor desc = {};
	desc.entries = entryData[group].data();
	desc.entryCount = static_cast<uint32_t>(entryCounts[group]);

	// We should never produce a bad descriptor.
	ASSERT(!ValidateBindGroupLayoutDescriptor(device, &desc).IsError());

	Ref<BindGroupLayoutBase> bgl;
	DAWN_TRY_ASSIGN(bgl, device->GetOrCreateBindGroupLayout(&desc));
	bindGroupLayouts[group] = bgl.Detach();
	}

	PipelineLayoutDescriptor desc = {};
	desc.bindGroupLayouts = bindGroupLayouts.data();
	desc.bindGroupLayoutCount = static_cast<uint32_t>(bindGroupLayoutCount);
	PipelineLayoutBase* pipelineLayout = device->CreatePipelineLayout(&desc);
	ASSERT(!pipelineLayout->IsError());

	// These bind group layouts are created internally and referenced by the pipeline layout.
	// Release the external refcount.
	for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
	if (bindGroupLayouts[group] != nullptr) {
	bindGroupLayouts[group]->Release();
	}
	}

	for (uint32_t moduleIndex = 0; moduleIndex < count; ++moduleIndex) {
	ASSERT(modules[moduleIndex]
	->ValidateCompatibilityWithPipelineLayout(pipelineLayout)
	.IsSuccess());
	}

	return pipelineLayout;
	}

	const BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(BindGroupIndex group) const {
	ASSERT(!IsError());
	ASSERT(group < kMaxBindGroupsTyped);
	ASSERT(mMask[group]);
	const BindGroupLayoutBase* bgl = mBindGroupLayouts[group].Get();
	ASSERT(bgl != nullptr);
	return bgl;
	}

	BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(BindGroupIndex group) {
	ASSERT(!IsError());
	ASSERT(group < kMaxBindGroupsTyped);
	ASSERT(mMask[group]);
	BindGroupLayoutBase* bgl = mBindGroupLayouts[group].Get();
	ASSERT(bgl != nullptr);
	return bgl;
	}

	const BindGroupLayoutMask& PipelineLayoutBase::GetBindGroupLayoutsMask() const {
	ASSERT(!IsError());
	return mMask;
	}

	BindGroupLayoutMask PipelineLayoutBase::InheritedGroupsMask(
	const PipelineLayoutBase* other) const {
	ASSERT(!IsError());
	return {(1 << static_cast<uint32_t>(GroupsInheritUpTo(other))) - 1u};
	}

	BindGroupIndex PipelineLayoutBase::GroupsInheritUpTo(const PipelineLayoutBase* other) const {
	ASSERT(!IsError());

	for (BindGroupIndex i(0); i < kMaxBindGroupsTyped; ++i) {
	if (!mMask[i] \|\| mBindGroupLayouts[i].Get() != other->mBindGroupLayouts[i].Get()) {
	return i;
	}
	}
	return kMaxBindGroupsTyped;
	}

	size_t PipelineLayoutBase::HashFunc::operator()(const PipelineLayoutBase* pl) const {
	size_t hash = Hash(pl->mMask);

	for (BindGroupIndex group : IterateBitSet(pl->mMask)) {
	HashCombine(&hash, pl->GetBindGroupLayout(group));
	}

	return hash;
	}

	bool PipelineLayoutBase::EqualityFunc::operator()(const PipelineLayoutBase* a,
	const PipelineLayoutBase* b) const {
	if (a->mMask != b->mMask) {
	return false;
	}

	for (BindGroupIndex group : IterateBitSet(a->mMask)) {
	if (a->GetBindGroupLayout(group) != b->GetBindGroupLayout(group)) {
	return false;
	}
	}

	return true;
	}

	} // namespace dawn_native