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// 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 "dawn_native/BindGroupLayout.h"
#include "dawn_native/Device.h"
namespace dawn_native {
MaybeError ValidatePipelineLayoutDescriptor(DeviceBase*,
const PipelineLayoutDescriptor* descriptor) {
if (descriptor->nextInChain != nullptr) {
return DAWN_VALIDATION_ERROR("nextInChain must be nullptr");
}
if (descriptor->numBindGroupLayouts > kMaxBindGroups) {
return DAWN_VALIDATION_ERROR("too many bind group layouts");
}
for (uint32_t i = 0; i < descriptor->numBindGroupLayouts; ++i) {
if (descriptor->bindGroupLayouts[i] == nullptr) {
return DAWN_VALIDATION_ERROR("bind group layouts may not be null");
}
}
return {};
}
// PipelineLayoutBase
PipelineLayoutBase::PipelineLayoutBase(DeviceBase* device,
const PipelineLayoutDescriptor* descriptor)
: ObjectBase(device) {
ASSERT(descriptor->numBindGroupLayouts <= kMaxBindGroups);
for (uint32_t group = 0; group < descriptor->numBindGroupLayouts; ++group) {
mBindGroupLayouts[group] = descriptor->bindGroupLayouts[group];
mMask.set(group);
}
}
const BindGroupLayoutBase* PipelineLayoutBase::GetBindGroupLayout(size_t group) const {
ASSERT(group < kMaxBindGroups);
return mBindGroupLayouts[group].Get();
}
const std::bitset<kMaxBindGroups> PipelineLayoutBase::GetBindGroupLayoutsMask() const {
return mMask;
}
std::bitset<kMaxBindGroups> 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;
}
} // namespace dawn_native