dawn-cmake/src/backend/BindGroupLayout.cpp

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// 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/BindGroupLayout.h"
#include "backend/Device.h"
#include "common/HashUtils.h"
#include <functional>
namespace backend {
namespace {
size_t HashBindingInfo(const BindGroupLayoutBase::LayoutBindingInfo& info) {
size_t hash = Hash(info.mask);
for (size_t binding = 0; binding < kMaxBindingsPerGroup; ++binding) {
if (info.mask[binding]) {
HashCombine(&hash, info.visibilities[binding], info.types[binding]);
}
}
return hash;
}
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bool operator==(const BindGroupLayoutBase::LayoutBindingInfo& a,
const BindGroupLayoutBase::LayoutBindingInfo& b) {
if (a.mask != b.mask) {
return false;
}
for (size_t binding = 0; binding < kMaxBindingsPerGroup; ++binding) {
if (a.mask[binding]) {
if (a.visibilities[binding] != b.visibilities[binding]) {
return false;
}
if (a.types[binding] != b.types[binding]) {
return false;
}
}
}
return true;
}
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} // namespace
// BindGroupLayoutBase
BindGroupLayoutBase::BindGroupLayoutBase(BindGroupLayoutBuilder* builder, bool blueprint)
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: mDevice(builder->mDevice), mBindingInfo(builder->mBindingInfo), mIsBlueprint(blueprint) {
}
BindGroupLayoutBase::~BindGroupLayoutBase() {
// Do not register the actual cached object if we are a blueprint
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if (!mIsBlueprint) {
mDevice->UncacheBindGroupLayout(this);
}
}
const BindGroupLayoutBase::LayoutBindingInfo& BindGroupLayoutBase::GetBindingInfo() const {
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return mBindingInfo;
}
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DeviceBase* BindGroupLayoutBase::GetDevice() const {
return mDevice;
}
// BindGroupLayoutBuilder
BindGroupLayoutBuilder::BindGroupLayoutBuilder(DeviceBase* device) : Builder(device) {
}
const BindGroupLayoutBase::LayoutBindingInfo& BindGroupLayoutBuilder::GetBindingInfo() const {
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return mBindingInfo;
}
BindGroupLayoutBase* BindGroupLayoutBuilder::GetResultImpl() {
BindGroupLayoutBase blueprint(this, true);
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auto* result = mDevice->GetOrCreateBindGroupLayout(&blueprint, this);
return result;
}
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void BindGroupLayoutBuilder::SetBindingsType(nxt::ShaderStageBit visibility,
nxt::BindingType bindingType,
uint32_t start,
uint32_t count) {
if (start + count > kMaxBindingsPerGroup) {
HandleError("Setting bindings type over maximum number of bindings");
return;
}
for (size_t i = start; i < start + count; i++) {
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if (mBindingInfo.mask[i]) {
HandleError("Setting already set binding type");
return;
}
}
for (size_t i = start; i < start + count; i++) {
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mBindingInfo.mask.set(i);
mBindingInfo.visibilities[i] = visibility;
mBindingInfo.types[i] = bindingType;
}
}
// BindGroupLayoutCacheFuncs
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size_t BindGroupLayoutCacheFuncs::operator()(const BindGroupLayoutBase* bgl) const {
return HashBindingInfo(bgl->GetBindingInfo());
}
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bool BindGroupLayoutCacheFuncs::operator()(const BindGroupLayoutBase* a,
const BindGroupLayoutBase* b) const {
return a->GetBindingInfo() == b->GetBindingInfo();
}
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} // namespace backend