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// Copyright 2021 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/IndirectDrawMetadata.h"
#include "common/Constants.h"
#include "common/RefCounted.h"
#include "dawn_native/IndirectDrawValidationEncoder.h"
#include "dawn_native/Limits.h"
#include "dawn_native/RenderBundle.h"
#include <algorithm>
#include <utility>
namespace dawn::native {
uint32_t ComputeMaxIndirectValidationBatchOffsetRange(const CombinedLimits& limits) {
return limits.v1.maxStorageBufferBindingSize - limits.v1.minStorageBufferOffsetAlignment -
kDrawIndexedIndirectSize;
}
IndirectDrawMetadata::IndexedIndirectBufferValidationInfo::IndexedIndirectBufferValidationInfo(
BufferBase* indirectBuffer)
: mIndirectBuffer(indirectBuffer) {
}
void IndirectDrawMetadata::IndexedIndirectBufferValidationInfo::AddIndexedIndirectDraw(
uint32_t maxDrawCallsPerIndirectValidationBatch,
uint32_t maxBatchOffsetRange,
IndexedIndirectDraw draw) {
const uint64_t newOffset = draw.clientBufferOffset;
auto it = mBatches.begin();
while (it != mBatches.end()) {
IndexedIndirectValidationBatch& batch = *it;
if (batch.draws.size() >= maxDrawCallsPerIndirectValidationBatch) {
// This batch is full. If its minOffset is to the right of the new offset, we can
// just insert a new batch here.
if (newOffset < batch.minOffset) {
break;
}
// Otherwise keep looking.
++it;
continue;
}
if (newOffset >= batch.minOffset && newOffset <= batch.maxOffset) {
batch.draws.push_back(std::move(draw));
return;
}
if (newOffset < batch.minOffset && batch.maxOffset - newOffset <= maxBatchOffsetRange) {
// We can extend this batch to the left in order to fit the new offset.
batch.minOffset = newOffset;
batch.draws.push_back(std::move(draw));
return;
}
if (newOffset > batch.maxOffset && newOffset - batch.minOffset <= maxBatchOffsetRange) {
// We can extend this batch to the right in order to fit the new offset.
batch.maxOffset = newOffset;
batch.draws.push_back(std::move(draw));
return;
}
if (newOffset < batch.minOffset) {
// We want to insert a new batch just before this one.
break;
}
++it;
}
IndexedIndirectValidationBatch newBatch;
newBatch.minOffset = newOffset;
newBatch.maxOffset = newOffset;
newBatch.draws.push_back(std::move(draw));
mBatches.insert(it, std::move(newBatch));
}
void IndirectDrawMetadata::IndexedIndirectBufferValidationInfo::AddBatch(
uint32_t maxDrawCallsPerIndirectValidationBatch,
uint32_t maxBatchOffsetRange,
const IndexedIndirectValidationBatch& newBatch) {
auto it = mBatches.begin();
while (it != mBatches.end()) {
IndexedIndirectValidationBatch& batch = *it;
uint64_t min = std::min(newBatch.minOffset, batch.minOffset);
uint64_t max = std::max(newBatch.maxOffset, batch.maxOffset);
if (max - min <= maxBatchOffsetRange && batch.draws.size() + newBatch.draws.size() <=
maxDrawCallsPerIndirectValidationBatch) {
// This batch fits within the limits of an existing batch. Merge it.
batch.minOffset = min;
batch.maxOffset = max;
batch.draws.insert(batch.draws.end(), newBatch.draws.begin(), newBatch.draws.end());
return;
}
if (newBatch.minOffset < batch.minOffset) {
break;
}
++it;
}
mBatches.push_back(newBatch);
}
const std::vector<IndirectDrawMetadata::IndexedIndirectValidationBatch>&
IndirectDrawMetadata::IndexedIndirectBufferValidationInfo::GetBatches() const {
return mBatches;
}
IndirectDrawMetadata::IndirectDrawMetadata(const CombinedLimits& limits)
: mMaxDrawCallsPerBatch(ComputeMaxDrawCallsPerIndirectValidationBatch(limits)),
mMaxBatchOffsetRange(ComputeMaxIndirectValidationBatchOffsetRange(limits)) {
}
IndirectDrawMetadata::~IndirectDrawMetadata() = default;
IndirectDrawMetadata::IndirectDrawMetadata(IndirectDrawMetadata&&) = default;
IndirectDrawMetadata& IndirectDrawMetadata::operator=(IndirectDrawMetadata&&) = default;
IndirectDrawMetadata::IndexedIndirectBufferValidationInfoMap*
IndirectDrawMetadata::GetIndexedIndirectBufferValidationInfo() {
return &mIndexedIndirectBufferValidationInfo;
}
void IndirectDrawMetadata::AddBundle(RenderBundleBase* bundle) {
auto [_, inserted] = mAddedBundles.insert(bundle);
if (!inserted) {
return;
}
for (const auto& [config, validationInfo] :
bundle->GetIndirectDrawMetadata().mIndexedIndirectBufferValidationInfo) {
auto it = mIndexedIndirectBufferValidationInfo.lower_bound(config);
if (it != mIndexedIndirectBufferValidationInfo.end() && it->first == config) {
// We already have batches for the same config. Merge the new ones in.
for (const IndexedIndirectValidationBatch& batch : validationInfo.GetBatches()) {
it->second.AddBatch(mMaxDrawCallsPerBatch, mMaxBatchOffsetRange, batch);
}
} else {
mIndexedIndirectBufferValidationInfo.emplace_hint(it, config, validationInfo);
}
}
}
void IndirectDrawMetadata::AddIndexedIndirectDraw(wgpu::IndexFormat indexFormat,
uint64_t indexBufferSize,
BufferBase* indirectBuffer,
uint64_t indirectOffset,
DrawIndexedIndirectCmd* cmd) {
uint64_t numIndexBufferElements;
switch (indexFormat) {
case wgpu::IndexFormat::Uint16:
numIndexBufferElements = indexBufferSize / 2;
break;
case wgpu::IndexFormat::Uint32:
numIndexBufferElements = indexBufferSize / 4;
break;
case wgpu::IndexFormat::Undefined:
UNREACHABLE();
}
const IndexedIndirectConfig config(indirectBuffer, numIndexBufferElements);
auto it = mIndexedIndirectBufferValidationInfo.find(config);
if (it == mIndexedIndirectBufferValidationInfo.end()) {
auto result = mIndexedIndirectBufferValidationInfo.emplace(
config, IndexedIndirectBufferValidationInfo(indirectBuffer));
it = result.first;
}
IndexedIndirectDraw draw;
draw.clientBufferOffset = indirectOffset;
draw.cmd = cmd;
it->second.AddIndexedIndirectDraw(mMaxDrawCallsPerBatch, mMaxBatchOffsetRange,
std::move(draw));
}
} // namespace dawn::native