src/dawn_native/vulkan/RenderPassCache.cpp - dawn - Git at Google

 // 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.

 #include "dawn_native/vulkan/RenderPassCache.h"

 #include "common/BitSetIterator.h"
 #include "common/HashUtils.h"
 #include "dawn_native/vulkan/DeviceVk.h"
 #include "dawn_native/vulkan/TextureVk.h"
 #include "dawn_native/vulkan/VulkanError.h"

 namespace dawn_native { namespace vulkan {

     namespace {
         VkAttachmentLoadOp VulkanAttachmentLoadOp(wgpu::LoadOp op) {
             switch (op) {
                 case wgpu::LoadOp::Load:
                     return VK_ATTACHMENT_LOAD_OP_LOAD;
                 case wgpu::LoadOp::Clear:
                     return VK_ATTACHMENT_LOAD_OP_CLEAR;
             }
             UNREACHABLE();
         }

         VkAttachmentStoreOp VulkanAttachmentStoreOp(wgpu::StoreOp op) {
             switch (op) {
                 case wgpu::StoreOp::Store:
                     return VK_ATTACHMENT_STORE_OP_STORE;
                 case wgpu::StoreOp::Discard:
                     return VK_ATTACHMENT_STORE_OP_DONT_CARE;
             }
             UNREACHABLE();
         }
     }  // anonymous namespace

     // RenderPassCacheQuery

     void RenderPassCacheQuery::SetColor(ColorAttachmentIndex index,
                                         wgpu::TextureFormat format,
                                         wgpu::LoadOp loadOp,
                                         wgpu::StoreOp storeOp,
                                         bool hasResolveTarget) {
         colorMask.set(index);
         colorFormats[index] = format;
         colorLoadOp[index] = loadOp;
         colorStoreOp[index] = storeOp;
         resolveTargetMask[index] = hasResolveTarget;
     }

     void RenderPassCacheQuery::SetDepthStencil(wgpu::TextureFormat format,
                                                wgpu::LoadOp depthLoadOpIn,
                                                wgpu::StoreOp depthStoreOpIn,
                                                wgpu::LoadOp stencilLoadOpIn,
                                                wgpu::StoreOp stencilStoreOpIn) {
         hasDepthStencil = true;
         depthStencilFormat = format;
         depthLoadOp = depthLoadOpIn;
         depthStoreOp = depthStoreOpIn;
         stencilLoadOp = stencilLoadOpIn;
         stencilStoreOp = stencilStoreOpIn;
     }

     void RenderPassCacheQuery::SetSampleCount(uint32_t sampleCount) {
         this->sampleCount = sampleCount;
     }

     // RenderPassCache

     RenderPassCache::RenderPassCache(Device* device) : mDevice(device) {
     }

     RenderPassCache::~RenderPassCache() {
         std::lock_guard<std::mutex> lock(mMutex);
         for (auto it : mCache) {
             mDevice->fn.DestroyRenderPass(mDevice->GetVkDevice(), it.second, nullptr);
         }

         mCache.clear();
     }

     ResultOrError<VkRenderPass> RenderPassCache::GetRenderPass(const RenderPassCacheQuery& query) {
         std::lock_guard<std::mutex> lock(mMutex);
         auto it = mCache.find(query);
         if (it != mCache.end()) {
             return VkRenderPass(it->second);
         }

         VkRenderPass renderPass;
         DAWN_TRY_ASSIGN(renderPass, CreateRenderPassForQuery(query));
         mCache.emplace(query, renderPass);
         return renderPass;
     }

     ResultOrError<VkRenderPass> RenderPassCache::CreateRenderPassForQuery(
         const RenderPassCacheQuery& query) const {
         // The Vulkan subpasses want to know the layout of the attachments with VkAttachmentRef.
         // Precompute them as they must be pointer-chained in VkSubpassDescription
         std::array<VkAttachmentReference, kMaxColorAttachments> colorAttachmentRefs;
         std::array<VkAttachmentReference, kMaxColorAttachments> resolveAttachmentRefs;
         VkAttachmentReference depthStencilAttachmentRef;

         // Contains the attachment description that will be chained in the create info
         // The order of all attachments in attachmentDescs is "color-depthstencil-resolve".
         constexpr uint8_t kMaxAttachmentCount = kMaxColorAttachments * 2 + 1;
         std::array<VkAttachmentDescription, kMaxAttachmentCount> attachmentDescs = {};

         VkSampleCountFlagBits vkSampleCount = VulkanSampleCount(query.sampleCount);

         uint32_t colorAttachmentIndex = 0;
         for (ColorAttachmentIndex i : IterateBitSet(query.colorMask)) {
             auto& attachmentRef = colorAttachmentRefs[colorAttachmentIndex];
             auto& attachmentDesc = attachmentDescs[colorAttachmentIndex];

             attachmentRef.attachment = colorAttachmentIndex;
             attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

             attachmentDesc.flags = 0;
             attachmentDesc.format = VulkanImageFormat(mDevice, query.colorFormats[i]);
             attachmentDesc.samples = vkSampleCount;
             attachmentDesc.loadOp = VulkanAttachmentLoadOp(query.colorLoadOp[i]);
             attachmentDesc.storeOp = VulkanAttachmentStoreOp(query.colorStoreOp[i]);
             attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
             attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

             ++colorAttachmentIndex;
         }

         uint32_t attachmentCount = colorAttachmentIndex;
         VkAttachmentReference* depthStencilAttachment = nullptr;
         if (query.hasDepthStencil) {
             auto& attachmentDesc = attachmentDescs[attachmentCount];

             depthStencilAttachment = &depthStencilAttachmentRef;

             depthStencilAttachmentRef.attachment = attachmentCount;
             depthStencilAttachmentRef.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

             attachmentDesc.flags = 0;
             attachmentDesc.format = VulkanImageFormat(mDevice, query.depthStencilFormat);
             attachmentDesc.samples = vkSampleCount;
             attachmentDesc.loadOp = VulkanAttachmentLoadOp(query.depthLoadOp);
             attachmentDesc.storeOp = VulkanAttachmentStoreOp(query.depthStoreOp);
             attachmentDesc.stencilLoadOp = VulkanAttachmentLoadOp(query.stencilLoadOp);
             attachmentDesc.stencilStoreOp = VulkanAttachmentStoreOp(query.stencilStoreOp);
             attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
             attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

             ++attachmentCount;
         }

         uint32_t resolveAttachmentIndex = 0;
         for (ColorAttachmentIndex i : IterateBitSet(query.resolveTargetMask)) {
             auto& attachmentRef = resolveAttachmentRefs[resolveAttachmentIndex];
             auto& attachmentDesc = attachmentDescs[attachmentCount];

             attachmentRef.attachment = attachmentCount;
             attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

             attachmentDesc.flags = 0;
             attachmentDesc.format = VulkanImageFormat(mDevice, query.colorFormats[i]);
             attachmentDesc.samples = VK_SAMPLE_COUNT_1_BIT;
             attachmentDesc.loadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
             attachmentDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
             attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
             attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

             ++attachmentCount;
             ++resolveAttachmentIndex;
         }

         // All color attachments without a corresponding resolve attachment must be set to VK_ATTACHMENT_UNUSED
         for (; resolveAttachmentIndex < colorAttachmentIndex; resolveAttachmentIndex++) {
             auto& attachmentRef = resolveAttachmentRefs[resolveAttachmentIndex];
             attachmentRef.attachment = VK_ATTACHMENT_UNUSED;
             attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL; // The Khronos Vulkan validation layer will complain if not set
         }

         VkAttachmentReference* resolveTargetAttachmentRefs =
             query.resolveTargetMask.any() ? resolveAttachmentRefs.data() : nullptr;

         // Create the VkSubpassDescription that will be chained in the VkRenderPassCreateInfo
         VkSubpassDescription subpassDesc;
         subpassDesc.flags = 0;
         subpassDesc.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
         subpassDesc.inputAttachmentCount = 0;
         subpassDesc.pInputAttachments = nullptr;
         subpassDesc.colorAttachmentCount = colorAttachmentIndex;
         subpassDesc.pColorAttachments = colorAttachmentRefs.data();
         subpassDesc.pResolveAttachments = resolveTargetAttachmentRefs;
         subpassDesc.pDepthStencilAttachment = depthStencilAttachment;
         subpassDesc.preserveAttachmentCount = 0;
         subpassDesc.pPreserveAttachments = nullptr;

         // Chain everything in VkRenderPassCreateInfo
         VkRenderPassCreateInfo createInfo;
         createInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
         createInfo.pNext = nullptr;
         createInfo.flags = 0;
         createInfo.attachmentCount = attachmentCount;
         createInfo.pAttachments = attachmentDescs.data();
         createInfo.subpassCount = 1;
         createInfo.pSubpasses = &subpassDesc;
         createInfo.dependencyCount = 0;
         createInfo.pDependencies = nullptr;

         // Create the render pass from the zillion parameters
         VkRenderPass renderPass;
         DAWN_TRY(CheckVkSuccess(mDevice->fn.CreateRenderPass(mDevice->GetVkDevice(), &createInfo,
                                                              nullptr, &*renderPass),
                                 "CreateRenderPass"));
         return renderPass;
     }

     // RenderPassCache

     size_t RenderPassCache::CacheFuncs::operator()(const RenderPassCacheQuery& query) const {
         size_t hash = Hash(query.colorMask);

         HashCombine(&hash, Hash(query.resolveTargetMask));

         for (ColorAttachmentIndex i : IterateBitSet(query.colorMask)) {
             HashCombine(&hash, query.colorFormats[i], query.colorLoadOp[i]);
         }

         HashCombine(&hash, query.hasDepthStencil);
         if (query.hasDepthStencil) {
             HashCombine(&hash, query.depthStencilFormat, query.depthLoadOp, query.stencilLoadOp);
         }

         HashCombine(&hash, query.sampleCount);

         return hash;
     }

     bool RenderPassCache::CacheFuncs::operator()(const RenderPassCacheQuery& a,
                                                  const RenderPassCacheQuery& b) const {
         if (a.colorMask != b.colorMask) {
             return false;
         }

         if (a.resolveTargetMask != b.resolveTargetMask) {
             return false;
         }

         if (a.sampleCount != b.sampleCount) {
             return false;
         }

         for (ColorAttachmentIndex i : IterateBitSet(a.colorMask)) {
             if ((a.colorFormats[i] != b.colorFormats[i]) ||
                 (a.colorLoadOp[i] != b.colorLoadOp[i])) {
                 return false;
             }
         }

         if (a.hasDepthStencil != b.hasDepthStencil) {
             return false;
         }

         if (a.hasDepthStencil) {
             if ((a.depthStencilFormat != b.depthStencilFormat) ||
                 (a.depthLoadOp != b.depthLoadOp) || (a.stencilLoadOp != b.stencilLoadOp)) {
                 return false;
             }
         }

         return true;
     }
 }}  // namespace dawn_native::vulkan
	// 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.

	#include "dawn_native/vulkan/RenderPassCache.h"

	#include "common/BitSetIterator.h"
	#include "common/HashUtils.h"
	#include "dawn_native/vulkan/DeviceVk.h"
	#include "dawn_native/vulkan/TextureVk.h"
	#include "dawn_native/vulkan/VulkanError.h"

	namespace dawn_native { namespace vulkan {

	namespace {
	VkAttachmentLoadOp VulkanAttachmentLoadOp(wgpu::LoadOp op) {
	switch (op) {
	case wgpu::LoadOp::Load:
	return VK_ATTACHMENT_LOAD_OP_LOAD;
	case wgpu::LoadOp::Clear:
	return VK_ATTACHMENT_LOAD_OP_CLEAR;
	}
	UNREACHABLE();
	}

	VkAttachmentStoreOp VulkanAttachmentStoreOp(wgpu::StoreOp op) {
	switch (op) {
	case wgpu::StoreOp::Store:
	return VK_ATTACHMENT_STORE_OP_STORE;
	case wgpu::StoreOp::Discard:
	return VK_ATTACHMENT_STORE_OP_DONT_CARE;
	}
	UNREACHABLE();
	}
	} // anonymous namespace

	// RenderPassCacheQuery

	void RenderPassCacheQuery::SetColor(ColorAttachmentIndex index,
	wgpu::TextureFormat format,
	wgpu::LoadOp loadOp,
	wgpu::StoreOp storeOp,
	bool hasResolveTarget) {
	colorMask.set(index);
	colorFormats[index] = format;
	colorLoadOp[index] = loadOp;
	colorStoreOp[index] = storeOp;
	resolveTargetMask[index] = hasResolveTarget;
	}

	void RenderPassCacheQuery::SetDepthStencil(wgpu::TextureFormat format,
	wgpu::LoadOp depthLoadOpIn,
	wgpu::StoreOp depthStoreOpIn,
	wgpu::LoadOp stencilLoadOpIn,
	wgpu::StoreOp stencilStoreOpIn) {
	hasDepthStencil = true;
	depthStencilFormat = format;
	depthLoadOp = depthLoadOpIn;
	depthStoreOp = depthStoreOpIn;
	stencilLoadOp = stencilLoadOpIn;
	stencilStoreOp = stencilStoreOpIn;
	}

	void RenderPassCacheQuery::SetSampleCount(uint32_t sampleCount) {
	this->sampleCount = sampleCount;
	}

	// RenderPassCache

	RenderPassCache::RenderPassCache(Device* device) : mDevice(device) {
	}

	RenderPassCache::~RenderPassCache() {
	std::lock_guard<std::mutex> lock(mMutex);
	for (auto it : mCache) {
	mDevice->fn.DestroyRenderPass(mDevice->GetVkDevice(), it.second, nullptr);
	}

	mCache.clear();
	}

	ResultOrError<VkRenderPass> RenderPassCache::GetRenderPass(const RenderPassCacheQuery& query) {
	std::lock_guard<std::mutex> lock(mMutex);
	auto it = mCache.find(query);
	if (it != mCache.end()) {
	return VkRenderPass(it->second);
	}

	VkRenderPass renderPass;
	DAWN_TRY_ASSIGN(renderPass, CreateRenderPassForQuery(query));
	mCache.emplace(query, renderPass);
	return renderPass;
	}

	ResultOrError<VkRenderPass> RenderPassCache::CreateRenderPassForQuery(
	const RenderPassCacheQuery& query) const {
	// The Vulkan subpasses want to know the layout of the attachments with VkAttachmentRef.
	// Precompute them as they must be pointer-chained in VkSubpassDescription
	std::array<VkAttachmentReference, kMaxColorAttachments> colorAttachmentRefs;
	std::array<VkAttachmentReference, kMaxColorAttachments> resolveAttachmentRefs;
	VkAttachmentReference depthStencilAttachmentRef;

	// Contains the attachment description that will be chained in the create info
	// The order of all attachments in attachmentDescs is "color-depthstencil-resolve".
	constexpr uint8_t kMaxAttachmentCount = kMaxColorAttachments * 2 + 1;
	std::array<VkAttachmentDescription, kMaxAttachmentCount> attachmentDescs = {};

	VkSampleCountFlagBits vkSampleCount = VulkanSampleCount(query.sampleCount);

	uint32_t colorAttachmentIndex = 0;
	for (ColorAttachmentIndex i : IterateBitSet(query.colorMask)) {
	auto& attachmentRef = colorAttachmentRefs[colorAttachmentIndex];
	auto& attachmentDesc = attachmentDescs[colorAttachmentIndex];

	attachmentRef.attachment = colorAttachmentIndex;
	attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

	attachmentDesc.flags = 0;
	attachmentDesc.format = VulkanImageFormat(mDevice, query.colorFormats[i]);
	attachmentDesc.samples = vkSampleCount;
	attachmentDesc.loadOp = VulkanAttachmentLoadOp(query.colorLoadOp[i]);
	attachmentDesc.storeOp = VulkanAttachmentStoreOp(query.colorStoreOp[i]);
	attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
	attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

	++colorAttachmentIndex;
	}

	uint32_t attachmentCount = colorAttachmentIndex;
	VkAttachmentReference* depthStencilAttachment = nullptr;
	if (query.hasDepthStencil) {
	auto& attachmentDesc = attachmentDescs[attachmentCount];

	depthStencilAttachment = &depthStencilAttachmentRef;

	depthStencilAttachmentRef.attachment = attachmentCount;
	depthStencilAttachmentRef.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

	attachmentDesc.flags = 0;
	attachmentDesc.format = VulkanImageFormat(mDevice, query.depthStencilFormat);
	attachmentDesc.samples = vkSampleCount;
	attachmentDesc.loadOp = VulkanAttachmentLoadOp(query.depthLoadOp);
	attachmentDesc.storeOp = VulkanAttachmentStoreOp(query.depthStoreOp);
	attachmentDesc.stencilLoadOp = VulkanAttachmentLoadOp(query.stencilLoadOp);
	attachmentDesc.stencilStoreOp = VulkanAttachmentStoreOp(query.stencilStoreOp);
	attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
	attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

	++attachmentCount;
	}

	uint32_t resolveAttachmentIndex = 0;
	for (ColorAttachmentIndex i : IterateBitSet(query.resolveTargetMask)) {
	auto& attachmentRef = resolveAttachmentRefs[resolveAttachmentIndex];
	auto& attachmentDesc = attachmentDescs[attachmentCount];

	attachmentRef.attachment = attachmentCount;
	attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

	attachmentDesc.flags = 0;
	attachmentDesc.format = VulkanImageFormat(mDevice, query.colorFormats[i]);
	attachmentDesc.samples = VK_SAMPLE_COUNT_1_BIT;
	attachmentDesc.loadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
	attachmentDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
	attachmentDesc.initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
	attachmentDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

	++attachmentCount;
	++resolveAttachmentIndex;
	}

	// All color attachments without a corresponding resolve attachment must be set to VK_ATTACHMENT_UNUSED
	for (; resolveAttachmentIndex < colorAttachmentIndex; resolveAttachmentIndex++) {
	auto& attachmentRef = resolveAttachmentRefs[resolveAttachmentIndex];
	attachmentRef.attachment = VK_ATTACHMENT_UNUSED;
	attachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL; // The Khronos Vulkan validation layer will complain if not set
	}

	VkAttachmentReference* resolveTargetAttachmentRefs =
	query.resolveTargetMask.any() ? resolveAttachmentRefs.data() : nullptr;

	// Create the VkSubpassDescription that will be chained in the VkRenderPassCreateInfo
	VkSubpassDescription subpassDesc;
	subpassDesc.flags = 0;
	subpassDesc.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
	subpassDesc.inputAttachmentCount = 0;
	subpassDesc.pInputAttachments = nullptr;
	subpassDesc.colorAttachmentCount = colorAttachmentIndex;
	subpassDesc.pColorAttachments = colorAttachmentRefs.data();
	subpassDesc.pResolveAttachments = resolveTargetAttachmentRefs;
	subpassDesc.pDepthStencilAttachment = depthStencilAttachment;
	subpassDesc.preserveAttachmentCount = 0;
	subpassDesc.pPreserveAttachments = nullptr;

	// Chain everything in VkRenderPassCreateInfo
	VkRenderPassCreateInfo createInfo;
	createInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
	createInfo.pNext = nullptr;
	createInfo.flags = 0;
	createInfo.attachmentCount = attachmentCount;
	createInfo.pAttachments = attachmentDescs.data();
	createInfo.subpassCount = 1;
	createInfo.pSubpasses = &subpassDesc;
	createInfo.dependencyCount = 0;
	createInfo.pDependencies = nullptr;

	// Create the render pass from the zillion parameters
	VkRenderPass renderPass;
	DAWN_TRY(CheckVkSuccess(mDevice->fn.CreateRenderPass(mDevice->GetVkDevice(), &createInfo,
	nullptr, &*renderPass),
	"CreateRenderPass"));
	return renderPass;
	}

	// RenderPassCache

	size_t RenderPassCache::CacheFuncs::operator()(const RenderPassCacheQuery& query) const {
	size_t hash = Hash(query.colorMask);

	HashCombine(&hash, Hash(query.resolveTargetMask));

	for (ColorAttachmentIndex i : IterateBitSet(query.colorMask)) {
	HashCombine(&hash, query.colorFormats[i], query.colorLoadOp[i]);
	}

	HashCombine(&hash, query.hasDepthStencil);
	if (query.hasDepthStencil) {
	HashCombine(&hash, query.depthStencilFormat, query.depthLoadOp, query.stencilLoadOp);
	}

	HashCombine(&hash, query.sampleCount);

	return hash;
	}

	bool RenderPassCache::CacheFuncs::operator()(const RenderPassCacheQuery& a,
	const RenderPassCacheQuery& b) const {
	if (a.colorMask != b.colorMask) {
	return false;
	}

	if (a.resolveTargetMask != b.resolveTargetMask) {
	return false;
	}

	if (a.sampleCount != b.sampleCount) {
	return false;
	}

	for (ColorAttachmentIndex i : IterateBitSet(a.colorMask)) {
	if ((a.colorFormats[i] != b.colorFormats[i]) \|\|
	(a.colorLoadOp[i] != b.colorLoadOp[i])) {
	return false;
	}
	}

	if (a.hasDepthStencil != b.hasDepthStencil) {
	return false;
	}

	if (a.hasDepthStencil) {
	if ((a.depthStencilFormat != b.depthStencilFormat) \|\|
	(a.depthLoadOp != b.depthLoadOp) \|\| (a.stencilLoadOp != b.stencilLoadOp)) {
	return false;
	}
	}

	return true;
	}
	}} // namespace dawn_native::vulkan