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

 // Copyright 2019 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/CommandValidation.h"

 #include "common/BitSetIterator.h"
 #include "dawn_native/BindGroup.h"
 #include "dawn_native/CommandBufferStateTracker.h"
 #include "dawn_native/Commands.h"
 #include "dawn_native/PassResourceUsageTracker.h"
 #include "dawn_native/RenderBundle.h"
 #include "dawn_native/RenderPipeline.h"

 namespace dawn_native {

     namespace {

         void TrackBindGroupResourceUsage(BindGroupBase* group,
                                          PassResourceUsageTracker* usageTracker) {
             const auto& layoutInfo = group->GetLayout()->GetBindingInfo();

             for (uint32_t i : IterateBitSet(layoutInfo.mask)) {
                 dawn::BindingType type = layoutInfo.types[i];

                 switch (type) {
                     case dawn::BindingType::UniformBuffer: {
                         BufferBase* buffer = group->GetBindingAsBufferBinding(i).buffer;
                         usageTracker->BufferUsedAs(buffer, dawn::BufferUsage::Uniform);
                     } break;

                     case dawn::BindingType::StorageBuffer: {
                         BufferBase* buffer = group->GetBindingAsBufferBinding(i).buffer;
                         usageTracker->BufferUsedAs(buffer, dawn::BufferUsage::Storage);
                     } break;

                     case dawn::BindingType::SampledTexture: {
                         TextureBase* texture = group->GetBindingAsTextureView(i)->GetTexture();
                         usageTracker->TextureUsedAs(texture, dawn::TextureUsage::Sampled);
                     } break;

                     case dawn::BindingType::Sampler:
                         break;

                     case dawn::BindingType::StorageTexture:
                     case dawn::BindingType::ReadonlyStorageBuffer:
                         UNREACHABLE();
                         break;
                 }
             }
         }

         inline MaybeError ValidateRenderBundleCommand(CommandIterator* commands,
                                                       Command type,
                                                       PassResourceUsageTracker* usageTracker,
                                                       CommandBufferStateTracker* commandBufferState,
                                                       const AttachmentState* attachmentState,
                                                       uint64_t* debugGroupStackSize,
                                                       const char* disallowedMessage) {
             switch (type) {
                 case Command::Draw: {
                     commands->NextCommand<DrawCmd>();
                     DAWN_TRY(commandBufferState->ValidateCanDraw());
                 } break;

                 case Command::DrawIndexed: {
                     commands->NextCommand<DrawIndexedCmd>();
                     DAWN_TRY(commandBufferState->ValidateCanDrawIndexed());
                 } break;

                 case Command::DrawIndirect: {
                     DrawIndirectCmd* cmd = commands->NextCommand<DrawIndirectCmd>();
                     DAWN_TRY(commandBufferState->ValidateCanDraw());
                     usageTracker->BufferUsedAs(cmd->indirectBuffer.Get(),
                                                dawn::BufferUsage::Indirect);
                 } break;

                 case Command::DrawIndexedIndirect: {
                     DrawIndexedIndirectCmd* cmd = commands->NextCommand<DrawIndexedIndirectCmd>();
                     DAWN_TRY(commandBufferState->ValidateCanDrawIndexed());
                     usageTracker->BufferUsedAs(cmd->indirectBuffer.Get(),
                                                dawn::BufferUsage::Indirect);
                 } break;

                 case Command::InsertDebugMarker: {
                     InsertDebugMarkerCmd* cmd = commands->NextCommand<InsertDebugMarkerCmd>();
                     commands->NextData<char>(cmd->length + 1);
                 } break;

                 case Command::PopDebugGroup: {
                     commands->NextCommand<PopDebugGroupCmd>();
                     DAWN_TRY(ValidateCanPopDebugGroup(*debugGroupStackSize));
                     *debugGroupStackSize -= 1;
                 } break;

                 case Command::PushDebugGroup: {
                     PushDebugGroupCmd* cmd = commands->NextCommand<PushDebugGroupCmd>();
                     commands->NextData<char>(cmd->length + 1);
                     *debugGroupStackSize += 1;
                 } break;

                 case Command::SetRenderPipeline: {
                     SetRenderPipelineCmd* cmd = commands->NextCommand<SetRenderPipelineCmd>();
                     RenderPipelineBase* pipeline = cmd->pipeline.Get();

                     if (DAWN_UNLIKELY(pipeline->GetAttachmentState() != attachmentState)) {
                         return DAWN_VALIDATION_ERROR("Pipeline attachment state is not compatible");
                     }
                     commandBufferState->SetRenderPipeline(pipeline);
                 } break;

                 case Command::SetBindGroup: {
                     SetBindGroupCmd* cmd = commands->NextCommand<SetBindGroupCmd>();
                     if (cmd->dynamicOffsetCount > 0) {
                         commands->NextData<uint64_t>(cmd->dynamicOffsetCount);
                     }

                     TrackBindGroupResourceUsage(cmd->group.Get(), usageTracker);
                     commandBufferState->SetBindGroup(cmd->index, cmd->group.Get());
                 } break;

                 case Command::SetIndexBuffer: {
                     SetIndexBufferCmd* cmd = commands->NextCommand<SetIndexBufferCmd>();

                     usageTracker->BufferUsedAs(cmd->buffer.Get(), dawn::BufferUsage::Index);
                     commandBufferState->SetIndexBuffer();
                 } break;

                 case Command::SetVertexBuffers: {
                     SetVertexBuffersCmd* cmd = commands->NextCommand<SetVertexBuffersCmd>();
                     auto buffers = commands->NextData<Ref<BufferBase>>(cmd->count);
                     commands->NextData<uint64_t>(cmd->count);

                     for (uint32_t i = 0; i < cmd->count; ++i) {
                         usageTracker->BufferUsedAs(buffers[i].Get(), dawn::BufferUsage::Vertex);
                     }
                     commandBufferState->SetVertexBuffer(cmd->startSlot, cmd->count);
                 } break;

                 default:
                     return DAWN_VALIDATION_ERROR(disallowedMessage);
             }

             return {};
         }

     }  // namespace

     MaybeError ValidateCanPopDebugGroup(uint64_t debugGroupStackSize) {
         if (debugGroupStackSize == 0) {
             return DAWN_VALIDATION_ERROR("Pop must be balanced by a corresponding Push.");
         }
         return {};
     }

     MaybeError ValidateFinalDebugGroupStackSize(uint64_t debugGroupStackSize) {
         if (debugGroupStackSize != 0) {
             return DAWN_VALIDATION_ERROR("Each Push must be balanced by a corresponding Pop.");
         }
         return {};
     }

     MaybeError ValidateRenderBundle(CommandIterator* commands,
                                     const AttachmentState* attachmentState,
                                     PassResourceUsage* resourceUsage) {
         PassResourceUsageTracker usageTracker;
         CommandBufferStateTracker commandBufferState;
         uint64_t debugGroupStackSize = 0;

         Command type;
         while (commands->NextCommandId(&type)) {
             DAWN_TRY(ValidateRenderBundleCommand(commands, type, &usageTracker, &commandBufferState,
                                                  attachmentState, &debugGroupStackSize,
                                                  "Command disallowed inside a render bundle"));
         }

         DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
         DAWN_TRY(usageTracker.ValidateRenderPassUsages());
         ASSERT(resourceUsage != nullptr);
         *resourceUsage = usageTracker.AcquireResourceUsage();

         return {};
     }

     MaybeError ValidateRenderPass(CommandIterator* commands,
                                   BeginRenderPassCmd* renderPass,
                                   std::vector<PassResourceUsage>* perPassResourceUsages) {
         PassResourceUsageTracker usageTracker;
         CommandBufferStateTracker commandBufferState;
         uint64_t debugGroupStackSize = 0;

         // Track usage of the render pass attachments
         for (uint32_t i : IterateBitSet(renderPass->attachmentState->GetColorAttachmentsMask())) {
             RenderPassColorAttachmentInfo* colorAttachment = &renderPass->colorAttachments[i];
             TextureBase* texture = colorAttachment->view->GetTexture();
             usageTracker.TextureUsedAs(texture, dawn::TextureUsage::OutputAttachment);

             TextureViewBase* resolveTarget = colorAttachment->resolveTarget.Get();
             if (resolveTarget != nullptr) {
                 usageTracker.TextureUsedAs(resolveTarget->GetTexture(),
                                            dawn::TextureUsage::OutputAttachment);
             }
         }

         if (renderPass->attachmentState->HasDepthStencilAttachment()) {
             TextureBase* texture = renderPass->depthStencilAttachment.view->GetTexture();
             usageTracker.TextureUsedAs(texture, dawn::TextureUsage::OutputAttachment);
         }

         Command type;
         while (commands->NextCommandId(&type)) {
             switch (type) {
                 case Command::EndRenderPass: {
                     commands->NextCommand<EndRenderPassCmd>();

                     DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
                     DAWN_TRY(usageTracker.ValidateRenderPassUsages());
                     ASSERT(perPassResourceUsages != nullptr);
                     perPassResourceUsages->push_back(usageTracker.AcquireResourceUsage());

                     return {};
                 } break;

                 case Command::ExecuteBundles: {
                     ExecuteBundlesCmd* cmd = commands->NextCommand<ExecuteBundlesCmd>();
                     auto bundles = commands->NextData<Ref<RenderBundleBase>>(cmd->count);
                     for (uint32_t i = 0; i < cmd->count; ++i) {
                         if (DAWN_UNLIKELY(renderPass->attachmentState.Get() !=
                                           bundles[i]->GetAttachmentState())) {
                             return DAWN_VALIDATION_ERROR(
                                 "Render bundle is not compatible with render pass");
                         }

                         const PassResourceUsage& usages = bundles[i]->GetResourceUsage();
                         for (uint32_t i = 0; i < usages.buffers.size(); ++i) {
                             usageTracker.BufferUsedAs(usages.buffers[i], usages.bufferUsages[i]);
                         }

                         for (uint32_t i = 0; i < usages.textures.size(); ++i) {
                             usageTracker.TextureUsedAs(usages.textures[i], usages.textureUsages[i]);
                         }
                     }

                     if (cmd->count > 0) {
                         // Reset state. It is invalidated after render bundle execution.
                         commandBufferState = CommandBufferStateTracker{};
                     }

                 } break;

                 case Command::SetStencilReference: {
                     commands->NextCommand<SetStencilReferenceCmd>();
                 } break;

                 case Command::SetBlendColor: {
                     commands->NextCommand<SetBlendColorCmd>();
                 } break;

                 case Command::SetViewport: {
                     commands->NextCommand<SetViewportCmd>();
                 } break;

                 case Command::SetScissorRect: {
                     commands->NextCommand<SetScissorRectCmd>();
                 } break;

                 default:
                     DAWN_TRY(ValidateRenderBundleCommand(
                         commands, type, &usageTracker, &commandBufferState,
                         renderPass->attachmentState.Get(), &debugGroupStackSize,
                         "Command disallowed inside a render pass"));
             }
         }

         UNREACHABLE();
         return DAWN_VALIDATION_ERROR("Unfinished render pass");
     }

     MaybeError ValidateComputePass(CommandIterator* commands,
                                    std::vector<PassResourceUsage>* perPassResourceUsages) {
         PassResourceUsageTracker usageTracker;
         CommandBufferStateTracker commandBufferState;
         uint64_t debugGroupStackSize = 0;

         Command type;
         while (commands->NextCommandId(&type)) {
             switch (type) {
                 case Command::EndComputePass: {
                     commands->NextCommand<EndComputePassCmd>();

                     DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
                     DAWN_TRY(usageTracker.ValidateComputePassUsages());
                     ASSERT(perPassResourceUsages != nullptr);
                     perPassResourceUsages->push_back(usageTracker.AcquireResourceUsage());
                     return {};
                 } break;

                 case Command::Dispatch: {
                     commands->NextCommand<DispatchCmd>();
                     DAWN_TRY(commandBufferState.ValidateCanDispatch());
                 } break;

                 case Command::DispatchIndirect: {
                     DispatchIndirectCmd* cmd = commands->NextCommand<DispatchIndirectCmd>();
                     DAWN_TRY(commandBufferState.ValidateCanDispatch());
                     usageTracker.BufferUsedAs(cmd->indirectBuffer.Get(),
                                               dawn::BufferUsage::Indirect);
                 } break;

                 case Command::InsertDebugMarker: {
                     InsertDebugMarkerCmd* cmd = commands->NextCommand<InsertDebugMarkerCmd>();
                     commands->NextData<char>(cmd->length + 1);
                 } break;

                 case Command::PopDebugGroup: {
                     commands->NextCommand<PopDebugGroupCmd>();
                     DAWN_TRY(ValidateCanPopDebugGroup(debugGroupStackSize));
                     debugGroupStackSize--;
                 } break;

                 case Command::PushDebugGroup: {
                     PushDebugGroupCmd* cmd = commands->NextCommand<PushDebugGroupCmd>();
                     commands->NextData<char>(cmd->length + 1);
                     debugGroupStackSize++;
                 } break;

                 case Command::SetComputePipeline: {
                     SetComputePipelineCmd* cmd = commands->NextCommand<SetComputePipelineCmd>();
                     ComputePipelineBase* pipeline = cmd->pipeline.Get();
                     commandBufferState.SetComputePipeline(pipeline);
                 } break;

                 case Command::SetBindGroup: {
                     SetBindGroupCmd* cmd = commands->NextCommand<SetBindGroupCmd>();
                     if (cmd->dynamicOffsetCount > 0) {
                         commands->NextData<uint64_t>(cmd->dynamicOffsetCount);
                     }

                     TrackBindGroupResourceUsage(cmd->group.Get(), &usageTracker);
                     commandBufferState.SetBindGroup(cmd->index, cmd->group.Get());
                 } break;

                 default:
                     return DAWN_VALIDATION_ERROR("Command disallowed inside a compute pass");
             }
         }

         UNREACHABLE();
         return DAWN_VALIDATION_ERROR("Unfinished compute pass");
     }

 }  // namespace dawn_native
	// Copyright 2019 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/CommandValidation.h"

	#include "common/BitSetIterator.h"
	#include "dawn_native/BindGroup.h"
	#include "dawn_native/CommandBufferStateTracker.h"
	#include "dawn_native/Commands.h"
	#include "dawn_native/PassResourceUsageTracker.h"
	#include "dawn_native/RenderBundle.h"
	#include "dawn_native/RenderPipeline.h"

	namespace dawn_native {

	namespace {

	void TrackBindGroupResourceUsage(BindGroupBase* group,
	PassResourceUsageTracker* usageTracker) {
	const auto& layoutInfo = group->GetLayout()->GetBindingInfo();

	for (uint32_t i : IterateBitSet(layoutInfo.mask)) {
	dawn::BindingType type = layoutInfo.types[i];

	switch (type) {
	case dawn::BindingType::UniformBuffer: {
	BufferBase* buffer = group->GetBindingAsBufferBinding(i).buffer;
	usageTracker->BufferUsedAs(buffer, dawn::BufferUsage::Uniform);
	} break;

	case dawn::BindingType::StorageBuffer: {
	BufferBase* buffer = group->GetBindingAsBufferBinding(i).buffer;
	usageTracker->BufferUsedAs(buffer, dawn::BufferUsage::Storage);
	} break;

	case dawn::BindingType::SampledTexture: {
	TextureBase* texture = group->GetBindingAsTextureView(i)->GetTexture();
	usageTracker->TextureUsedAs(texture, dawn::TextureUsage::Sampled);
	} break;

	case dawn::BindingType::Sampler:
	break;

	case dawn::BindingType::StorageTexture:
	case dawn::BindingType::ReadonlyStorageBuffer:
	UNREACHABLE();
	break;
	}
	}
	}

	inline MaybeError ValidateRenderBundleCommand(CommandIterator* commands,
	Command type,
	PassResourceUsageTracker* usageTracker,
	CommandBufferStateTracker* commandBufferState,
	const AttachmentState* attachmentState,
	uint64_t* debugGroupStackSize,
	const char* disallowedMessage) {
	switch (type) {
	case Command::Draw: {
	commands->NextCommand<DrawCmd>();
	DAWN_TRY(commandBufferState->ValidateCanDraw());
	} break;

	case Command::DrawIndexed: {
	commands->NextCommand<DrawIndexedCmd>();
	DAWN_TRY(commandBufferState->ValidateCanDrawIndexed());
	} break;

	case Command::DrawIndirect: {
	DrawIndirectCmd* cmd = commands->NextCommand<DrawIndirectCmd>();
	DAWN_TRY(commandBufferState->ValidateCanDraw());
	usageTracker->BufferUsedAs(cmd->indirectBuffer.Get(),
	dawn::BufferUsage::Indirect);
	} break;

	case Command::DrawIndexedIndirect: {
	DrawIndexedIndirectCmd* cmd = commands->NextCommand<DrawIndexedIndirectCmd>();
	DAWN_TRY(commandBufferState->ValidateCanDrawIndexed());
	usageTracker->BufferUsedAs(cmd->indirectBuffer.Get(),
	dawn::BufferUsage::Indirect);
	} break;

	case Command::InsertDebugMarker: {
	InsertDebugMarkerCmd* cmd = commands->NextCommand<InsertDebugMarkerCmd>();
	commands->NextData<char>(cmd->length + 1);
	} break;

	case Command::PopDebugGroup: {
	commands->NextCommand<PopDebugGroupCmd>();
	DAWN_TRY(ValidateCanPopDebugGroup(*debugGroupStackSize));
	*debugGroupStackSize -= 1;
	} break;

	case Command::PushDebugGroup: {
	PushDebugGroupCmd* cmd = commands->NextCommand<PushDebugGroupCmd>();
	commands->NextData<char>(cmd->length + 1);
	*debugGroupStackSize += 1;
	} break;

	case Command::SetRenderPipeline: {
	SetRenderPipelineCmd* cmd = commands->NextCommand<SetRenderPipelineCmd>();
	RenderPipelineBase* pipeline = cmd->pipeline.Get();

	if (DAWN_UNLIKELY(pipeline->GetAttachmentState() != attachmentState)) {
	return DAWN_VALIDATION_ERROR("Pipeline attachment state is not compatible");
	}
	commandBufferState->SetRenderPipeline(pipeline);
	} break;

	case Command::SetBindGroup: {
	SetBindGroupCmd* cmd = commands->NextCommand<SetBindGroupCmd>();
	if (cmd->dynamicOffsetCount > 0) {
	commands->NextData<uint64_t>(cmd->dynamicOffsetCount);
	}

	TrackBindGroupResourceUsage(cmd->group.Get(), usageTracker);
	commandBufferState->SetBindGroup(cmd->index, cmd->group.Get());
	} break;

	case Command::SetIndexBuffer: {
	SetIndexBufferCmd* cmd = commands->NextCommand<SetIndexBufferCmd>();

	usageTracker->BufferUsedAs(cmd->buffer.Get(), dawn::BufferUsage::Index);
	commandBufferState->SetIndexBuffer();
	} break;

	case Command::SetVertexBuffers: {
	SetVertexBuffersCmd* cmd = commands->NextCommand<SetVertexBuffersCmd>();
	auto buffers = commands->NextData<Ref<BufferBase>>(cmd->count);
	commands->NextData<uint64_t>(cmd->count);

	for (uint32_t i = 0; i < cmd->count; ++i) {
	usageTracker->BufferUsedAs(buffers[i].Get(), dawn::BufferUsage::Vertex);
	}
	commandBufferState->SetVertexBuffer(cmd->startSlot, cmd->count);
	} break;

	default:
	return DAWN_VALIDATION_ERROR(disallowedMessage);
	}

	return {};
	}

	} // namespace

	MaybeError ValidateCanPopDebugGroup(uint64_t debugGroupStackSize) {
	if (debugGroupStackSize == 0) {
	return DAWN_VALIDATION_ERROR("Pop must be balanced by a corresponding Push.");
	}
	return {};
	}

	MaybeError ValidateFinalDebugGroupStackSize(uint64_t debugGroupStackSize) {
	if (debugGroupStackSize != 0) {
	return DAWN_VALIDATION_ERROR("Each Push must be balanced by a corresponding Pop.");
	}
	return {};
	}

	MaybeError ValidateRenderBundle(CommandIterator* commands,
	const AttachmentState* attachmentState,
	PassResourceUsage* resourceUsage) {
	PassResourceUsageTracker usageTracker;
	CommandBufferStateTracker commandBufferState;
	uint64_t debugGroupStackSize = 0;

	Command type;
	while (commands->NextCommandId(&type)) {
	DAWN_TRY(ValidateRenderBundleCommand(commands, type, &usageTracker, &commandBufferState,
	attachmentState, &debugGroupStackSize,
	"Command disallowed inside a render bundle"));
	}

	DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
	DAWN_TRY(usageTracker.ValidateRenderPassUsages());
	ASSERT(resourceUsage != nullptr);
	*resourceUsage = usageTracker.AcquireResourceUsage();

	return {};
	}

	MaybeError ValidateRenderPass(CommandIterator* commands,
	BeginRenderPassCmd* renderPass,
	std::vector<PassResourceUsage>* perPassResourceUsages) {
	PassResourceUsageTracker usageTracker;
	CommandBufferStateTracker commandBufferState;
	uint64_t debugGroupStackSize = 0;

	// Track usage of the render pass attachments
	for (uint32_t i : IterateBitSet(renderPass->attachmentState->GetColorAttachmentsMask())) {
	RenderPassColorAttachmentInfo* colorAttachment = &renderPass->colorAttachments[i];
	TextureBase* texture = colorAttachment->view->GetTexture();
	usageTracker.TextureUsedAs(texture, dawn::TextureUsage::OutputAttachment);

	TextureViewBase* resolveTarget = colorAttachment->resolveTarget.Get();
	if (resolveTarget != nullptr) {
	usageTracker.TextureUsedAs(resolveTarget->GetTexture(),
	dawn::TextureUsage::OutputAttachment);
	}
	}

	if (renderPass->attachmentState->HasDepthStencilAttachment()) {
	TextureBase* texture = renderPass->depthStencilAttachment.view->GetTexture();
	usageTracker.TextureUsedAs(texture, dawn::TextureUsage::OutputAttachment);
	}

	Command type;
	while (commands->NextCommandId(&type)) {
	switch (type) {
	case Command::EndRenderPass: {
	commands->NextCommand<EndRenderPassCmd>();

	DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
	DAWN_TRY(usageTracker.ValidateRenderPassUsages());
	ASSERT(perPassResourceUsages != nullptr);
	perPassResourceUsages->push_back(usageTracker.AcquireResourceUsage());

	return {};
	} break;

	case Command::ExecuteBundles: {
	ExecuteBundlesCmd* cmd = commands->NextCommand<ExecuteBundlesCmd>();
	auto bundles = commands->NextData<Ref<RenderBundleBase>>(cmd->count);
	for (uint32_t i = 0; i < cmd->count; ++i) {
	if (DAWN_UNLIKELY(renderPass->attachmentState.Get() !=
	bundles[i]->GetAttachmentState())) {
	return DAWN_VALIDATION_ERROR(
	"Render bundle is not compatible with render pass");
	}

	const PassResourceUsage& usages = bundles[i]->GetResourceUsage();
	for (uint32_t i = 0; i < usages.buffers.size(); ++i) {
	usageTracker.BufferUsedAs(usages.buffers[i], usages.bufferUsages[i]);
	}

	for (uint32_t i = 0; i < usages.textures.size(); ++i) {
	usageTracker.TextureUsedAs(usages.textures[i], usages.textureUsages[i]);
	}
	}

	if (cmd->count > 0) {
	// Reset state. It is invalidated after render bundle execution.
	commandBufferState = CommandBufferStateTracker{};
	}

	} break;

	case Command::SetStencilReference: {
	commands->NextCommand<SetStencilReferenceCmd>();
	} break;

	case Command::SetBlendColor: {
	commands->NextCommand<SetBlendColorCmd>();
	} break;

	case Command::SetViewport: {
	commands->NextCommand<SetViewportCmd>();
	} break;

	case Command::SetScissorRect: {
	commands->NextCommand<SetScissorRectCmd>();
	} break;

	default:
	DAWN_TRY(ValidateRenderBundleCommand(
	commands, type, &usageTracker, &commandBufferState,
	renderPass->attachmentState.Get(), &debugGroupStackSize,
	"Command disallowed inside a render pass"));
	}
	}

	UNREACHABLE();
	return DAWN_VALIDATION_ERROR("Unfinished render pass");
	}

	MaybeError ValidateComputePass(CommandIterator* commands,
	std::vector<PassResourceUsage>* perPassResourceUsages) {
	PassResourceUsageTracker usageTracker;
	CommandBufferStateTracker commandBufferState;
	uint64_t debugGroupStackSize = 0;

	Command type;
	while (commands->NextCommandId(&type)) {
	switch (type) {
	case Command::EndComputePass: {
	commands->NextCommand<EndComputePassCmd>();

	DAWN_TRY(ValidateFinalDebugGroupStackSize(debugGroupStackSize));
	DAWN_TRY(usageTracker.ValidateComputePassUsages());
	ASSERT(perPassResourceUsages != nullptr);
	perPassResourceUsages->push_back(usageTracker.AcquireResourceUsage());
	return {};
	} break;

	case Command::Dispatch: {
	commands->NextCommand<DispatchCmd>();
	DAWN_TRY(commandBufferState.ValidateCanDispatch());
	} break;

	case Command::DispatchIndirect: {
	DispatchIndirectCmd* cmd = commands->NextCommand<DispatchIndirectCmd>();
	DAWN_TRY(commandBufferState.ValidateCanDispatch());
	usageTracker.BufferUsedAs(cmd->indirectBuffer.Get(),
	dawn::BufferUsage::Indirect);
	} break;

	case Command::InsertDebugMarker: {
	InsertDebugMarkerCmd* cmd = commands->NextCommand<InsertDebugMarkerCmd>();
	commands->NextData<char>(cmd->length + 1);
	} break;

	case Command::PopDebugGroup: {
	commands->NextCommand<PopDebugGroupCmd>();
	DAWN_TRY(ValidateCanPopDebugGroup(debugGroupStackSize));
	debugGroupStackSize--;
	} break;

	case Command::PushDebugGroup: {
	PushDebugGroupCmd* cmd = commands->NextCommand<PushDebugGroupCmd>();
	commands->NextData<char>(cmd->length + 1);
	debugGroupStackSize++;
	} break;

	case Command::SetComputePipeline: {
	SetComputePipelineCmd* cmd = commands->NextCommand<SetComputePipelineCmd>();
	ComputePipelineBase* pipeline = cmd->pipeline.Get();
	commandBufferState.SetComputePipeline(pipeline);
	} break;

	case Command::SetBindGroup: {
	SetBindGroupCmd* cmd = commands->NextCommand<SetBindGroupCmd>();
	if (cmd->dynamicOffsetCount > 0) {
	commands->NextData<uint64_t>(cmd->dynamicOffsetCount);
	}

	TrackBindGroupResourceUsage(cmd->group.Get(), &usageTracker);
	commandBufferState.SetBindGroup(cmd->index, cmd->group.Get());
	} break;

	default:
	return DAWN_VALIDATION_ERROR("Command disallowed inside a compute pass");
	}
	}

	UNREACHABLE();
	return DAWN_VALIDATION_ERROR("Unfinished compute pass");
	}

	} // namespace dawn_native