// Copyright 2017 The NXT 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 "backend/PipelineLayout.h" #include "backend/BindGroupLayout.h" #include "backend/Device.h" #include "common/Assert.h" namespace backend { MaybeError ValidatePipelineLayoutDescriptor(DeviceBase*, const nxt::PipelineLayoutDescriptor* descriptor) { NXT_TRY_ASSERT(descriptor->nextInChain == nullptr, "nextInChain must be nullptr"); NXT_TRY_ASSERT(descriptor->numBindGroupLayouts <= kMaxBindGroups, "too many bind group layouts"); for (uint32_t i = 0; i < descriptor->numBindGroupLayouts; ++i) { NXT_TRY_ASSERT(descriptor->bindGroupLayouts[i].Get() != nullptr, "bind group layouts may not be null"); } return {}; } // PipelineLayoutBase PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device, const nxt::PipelineLayoutDescriptor* descriptor) : mDevice(device) { ASSERT(descriptor->numBindGroupLayouts <= kMaxBindGroups); for (uint32_t group = 0; group < descriptor->numBindGroupLayouts; ++group) { mBindGroupLayouts[group] = reinterpret_cast(descriptor->bindGroupLayouts[group].Get()); mMask.set(group); } } const BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(size_t group) const { ASSERT(group < kMaxBindGroups); return mBindGroupLayouts[group].Get(); } const std::bitset PipelineLayoutBase::GetBindGroupLayoutsMask() const { return mMask; } std::bitset PipelineLayoutBase::InheritedGroupsMask( const PipelineLayoutBase* other) const { return {(1 << GroupsInheritUpTo(other)) - 1u}; } uint32_t PipelineLayoutBase::GroupsInheritUpTo(const PipelineLayoutBase* other) const { for (uint32_t i = 0; i < kMaxBindGroups; ++i) { if (!mMask[i] || mBindGroupLayouts[i].Get() != other->mBindGroupLayouts[i].Get()) { return i; } } return kMaxBindGroups + 1; } DeviceBase* PipelineLayoutBase::GetDevice() const { return mDevice; } } // namespace backend