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Refactor PipelineLayoutBase::CreateDefault 

This function was bit long and was difficult to read. Refactor it to use
a single double keyed map and helper functions.

Bug: dawn:527

Change-Id: I8c1173fd0e06256c7e7060a850996e1e90187d50
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28640
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This commit is contained in:
Corentin Wallez 2020-09-24 11:27:47 +00:00 committed by Commit Bot service account
parent 75e5ed6161
commit ed0b3cf153
1 changed files with 91 additions and 91 deletions
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182
src/dawn_native/PipelineLayout.cpp
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@ -24,20 +24,6 @@
namespace dawn_native {
namespace {
bool InferredBindGroupLayoutEntriesCompatible(const BindGroupLayoutEntry& lhs,
const BindGroupLayoutEntry& rhs) {
// Minimum buffer binding size excluded because we take the maximum seen across stages.
// Visibility is excluded because we take the OR across stages.
return lhs.binding == rhs.binding && lhs.type == rhs.type &&
lhs.hasDynamicOffset == rhs.hasDynamicOffset &&
lhs.multisampled == rhs.multisampled && lhs.viewDimension == rhs.viewDimension &&
lhs.textureComponentType == rhs.textureComponentType;
}
} // anonymous namespace
MaybeError ValidatePipelineLayoutDescriptor(DeviceBase* device,
const PipelineLayoutDescriptor* descriptor) {
if (descriptor->nextInChain != nullptr) {
@ -92,113 +78,127 @@ namespace dawn_native {
ResultOrError<PipelineLayoutBase*> PipelineLayoutBase::CreateDefault(
DeviceBase* device,
std::vector<StageAndDescriptor> stages) {
using EntryMap = std::map<BindingNumber, BindGroupLayoutEntry>;
// Merges two entries at the same location, if they are allowed to be merged.
auto MergeEntries = [](BindGroupLayoutEntry* modifiedEntry,
const BindGroupLayoutEntry& mergedEntry) -> MaybeError {
// Minimum buffer binding size excluded because we take the maximum seen across stages.
// Visibility is excluded because we take the OR across stages.
bool compatible =
modifiedEntry->binding == mergedEntry.binding && //
modifiedEntry->type == mergedEntry.type && //
modifiedEntry->hasDynamicOffset == mergedEntry.hasDynamicOffset && //
modifiedEntry->multisampled == mergedEntry.multisampled && //
modifiedEntry->viewDimension == mergedEntry.viewDimension && //
modifiedEntry->textureComponentType == mergedEntry.textureComponentType;
// Check if any properties are incompatible with existing entry
// If compatible, we will merge some properties
if (!compatible) {
return DAWN_VALIDATION_ERROR(
"Duplicate binding in default pipeline layout initialization "
"not compatible with previous declaration");
}
// Use the max |minBufferBindingSize| we find.
modifiedEntry->minBufferBindingSize =
std::max(modifiedEntry->minBufferBindingSize, mergedEntry.minBufferBindingSize);
// Use the OR of all the stages at which we find this binding.
modifiedEntry->visibility |= mergedEntry.visibility;
return {};
};
// Does the trivial conversions from a ShaderBindingInfo to a BindGroupLayoutEntry
auto ConvertMetadataToEntry =
[](const EntryPointMetadata::ShaderBindingInfo& shaderBinding) -> BindGroupLayoutEntry {
BindGroupLayoutEntry entry = {};
entry.type = shaderBinding.type;
entry.hasDynamicOffset = false;
entry.multisampled = shaderBinding.multisampled;
entry.viewDimension = shaderBinding.viewDimension;
entry.textureComponentType =
Format::FormatTypeToTextureComponentType(shaderBinding.textureComponentType);
entry.storageTextureFormat = shaderBinding.storageTextureFormat;
entry.minBufferBindingSize = shaderBinding.minBufferBindingSize;
return entry;
};
// Creates the BGL from the entries for a stage, checking it is valid.
auto CreateBGL = [](DeviceBase* device,
const EntryMap& entries) -> ResultOrError<Ref<BindGroupLayoutBase>> {
std::vector<BindGroupLayoutEntry> entryVec;
entryVec.reserve(entries.size());
for (auto& it : entries) {
entryVec.push_back(it.second);
}
BindGroupLayoutDescriptor desc = {};
desc.entries = entryVec.data();
desc.entryCount = entryVec.size();
DAWN_TRY(ValidateBindGroupLayoutDescriptor(device, &desc));
return device->GetOrCreateBindGroupLayout(&desc);
};
ASSERT(!stages.empty());
// Data which BindGroupLayoutDescriptor will point to for creation
ityp::array<
BindGroupIndex,
ityp::stack_vec<BindingIndex, BindGroupLayoutEntry, kMaxOptimalBindingsPerGroup>,
kMaxBindGroups>
ityp::array<BindGroupIndex, std::map<BindingNumber, BindGroupLayoutEntry>, kMaxBindGroups>
entryData = {};
// A map of bindings to the index in |entryData|
ityp::array<BindGroupIndex, std::map<BindingNumber, BindingIndex>, kMaxBindGroups>
usedBindingsMap = {};
// A counter of how many bindings we've populated in |entryData|
ityp::array<BindGroupIndex, BindingIndex, kMaxBindGroups> entryCounts = {};
BindingCounts bindingCounts = {};
BindGroupIndex bindGroupLayoutCount(0);
// Loops over all the reflected BindGroupLayoutEntries from shaders.
for (const StageAndDescriptor& stage : stages) {
// Extract argument for this stage.
SingleShaderStage shaderStage = stage.first;
const EntryPointMetadata::BindingInfo& info =
stage.second->module->GetEntryPoint(stage.second->entryPoint, shaderStage).bindings;
for (BindGroupIndex group(0); group < info.size(); ++group) {
for (const auto& it : info[group]) {
BindingNumber bindingNumber = it.first;
const EntryPointMetadata::ShaderBindingInfo& bindingInfo = it.second;
for (const auto& bindingIt : info[group]) {
BindingNumber bindingNumber = bindingIt.first;
const EntryPointMetadata::ShaderBindingInfo& shaderBinding = bindingIt.second;
BindGroupLayoutEntry bindingSlot;
bindingSlot.binding = static_cast<uint32_t>(bindingNumber);
bindingSlot.visibility = StageBit(shaderStage);
bindingSlot.type = bindingInfo.type;
bindingSlot.hasDynamicOffset = false;
bindingSlot.multisampled = bindingInfo.multisampled;
bindingSlot.viewDimension = bindingInfo.viewDimension;
bindingSlot.textureComponentType =
Format::FormatTypeToTextureComponentType(bindingInfo.textureComponentType);
bindingSlot.storageTextureFormat = bindingInfo.storageTextureFormat;
bindingSlot.minBufferBindingSize = bindingInfo.minBufferBindingSize;
// Create the BindGroupLayoutEntry
BindGroupLayoutEntry entry = ConvertMetadataToEntry(shaderBinding);
entry.binding = static_cast<uint32_t>(bindingNumber);
entry.visibility = StageBit(shaderStage);
{
const auto& it = usedBindingsMap[group].find(bindingNumber);
if (it != usedBindingsMap[group].end()) {
BindGroupLayoutEntry* existingEntry = &entryData[group][it->second];
// Check if any properties are incompatible with existing entry
// If compatible, we will merge some properties
if (!InferredBindGroupLayoutEntriesCompatible(*existingEntry,
bindingSlot)) {
return DAWN_VALIDATION_ERROR(
"Duplicate binding in default pipeline layout initialization "
"not compatible with previous declaration");
}
// Use the max |minBufferBindingSize| we find.
existingEntry->minBufferBindingSize =
std::max(existingEntry->minBufferBindingSize,
bindingSlot.minBufferBindingSize);
// Use the OR of all the stages at which we find this binding.
existingEntry->visibility |= bindingSlot.visibility;
// Already used slot, continue
continue;
}
// Add it to our map of all entries, if there is an existing entry, then we
// need to merge, if we can.
const auto& insertion = entryData[group].insert({bindingNumber, entry});
if (!insertion.second) {
DAWN_TRY(MergeEntries(&insertion.first->second, entry));
}
IncrementBindingCounts(&bindingCounts, bindingSlot);
BindingIndex currentBindingCount = entryCounts[group];
entryData[group].resize(currentBindingCount + BindingIndex(1));
entryData[group][currentBindingCount] = bindingSlot;
usedBindingsMap[group][bindingNumber] = currentBindingCount;
entryCounts[group]++;
bindGroupLayoutCount =
std::max(bindGroupLayoutCount, group + BindGroupIndex(1));
}
}
}
// Create the deduced BGLs, validating if they are valid.
// Create the bind group layouts. We need to keep track of the last non-empty BGL because
// Dawn doesn't yet know that an empty BGL and a null BGL are the same thing.
// TODO(cwallez@chromium.org): remove this when Dawn knows that empty and null BGL are the
// same.
BindGroupIndex pipelineBGLCount = BindGroupIndex(0);
ityp::array<BindGroupIndex, Ref<BindGroupLayoutBase>, kMaxBindGroups> bindGroupLayouts = {};
for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
BindGroupLayoutDescriptor desc = {};
desc.entries = entryData[group].data();
desc.entryCount = static_cast<uint32_t>(entryCounts[group]);
DAWN_TRY(ValidateBindGroupLayoutDescriptor(device, &desc));
DAWN_TRY_ASSIGN(bindGroupLayouts[group], device->GetOrCreateBindGroupLayout(&desc));
ASSERT(!bindGroupLayouts[group]->IsError());
for (BindGroupIndex group(0); group < kMaxBindGroupsTyped; ++group) {
DAWN_TRY_ASSIGN(bindGroupLayouts[group], CreateBGL(device, entryData[group]));
if (entryData[group].size() != 0) {
pipelineBGLCount = group + BindGroupIndex(1);
}
}
// Create the deduced pipeline layout, validating if it is valid.
PipelineLayoutBase* pipelineLayout = nullptr;
{
ityp::array<BindGroupIndex, BindGroupLayoutBase*, kMaxBindGroups> bgls = {};
for (BindGroupIndex group(0); group < bindGroupLayoutCount; ++group) {
for (BindGroupIndex group(0); group < pipelineBGLCount; ++group) {
bgls[group] = bindGroupLayouts[group].Get();
}
PipelineLayoutDescriptor desc = {};
desc.bindGroupLayouts = bgls.data();
desc.bindGroupLayoutCount = static_cast<uint32_t>(bindGroupLayoutCount);
desc.bindGroupLayoutCount = static_cast<uint32_t>(pipelineBGLCount);
DAWN_TRY(ValidatePipelineLayoutDescriptor(device, &desc));
DAWN_TRY_ASSIGN(pipelineLayout, device->GetOrCreatePipelineLayout(&desc));