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// Copyright 2019 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SRC_DAWN_NATIVE_BINDGROUPTRACKER_H_
#define SRC_DAWN_NATIVE_BINDGROUPTRACKER_H_
#include <algorithm>
#include <array>
#include <bitset>
#include "dawn/common/Constants.h"
#include "dawn/native/BindGroup.h"
#include "dawn/native/Pipeline.h"
#include "dawn/native/PipelineLayout.h"
namespace dawn::native {
// Keeps track of the dirty bind groups so they can be lazily applied when we know the
// pipeline state or it changes.
// |DynamicOffset| is a template parameter because offsets in Vulkan are uint32_t but uint64_t
// in other backends.
template <bool CanInheritBindGroups, typename DynamicOffset>
class BindGroupTrackerBase {
public:
void OnSetBindGroup(BindGroupIndex index,
BindGroupBase* bindGroup,
uint32_t dynamicOffsetCount,
uint32_t* dynamicOffsets) {
DAWN_ASSERT(index < kMaxBindGroupsTyped);
if (mBindGroupLayoutsMask[index]) {
// It is okay to only dirty bind groups that are used by the current pipeline
// layout. If the pipeline layout changes, then the bind groups it uses will
// become dirty.
if (mBindGroups[index] != bindGroup) {
mDirtyBindGroups.set(index);
mDirtyBindGroupsObjectChangedOrIsDynamic.set(index);
}
if (dynamicOffsetCount > 0) {
mDirtyBindGroupsObjectChangedOrIsDynamic.set(index);
}
}
mBindGroups[index] = bindGroup;
mDynamicOffsets[index].resize(BindingIndex(dynamicOffsetCount));
std::copy(dynamicOffsets, dynamicOffsets + dynamicOffsetCount,
mDynamicOffsets[index].begin());
}
void OnSetPipeline(PipelineBase* pipeline) { mPipelineLayout = pipeline->GetLayout(); }
protected:
// The Derived class should call this before it applies bind groups.
void BeforeApply() {
if (mLastAppliedPipelineLayout == mPipelineLayout) {
return;
}
// Use the bind group layout mask to avoid marking unused bind groups as dirty.
mBindGroupLayoutsMask = mPipelineLayout->GetBindGroupLayoutsMask();
// Changing the pipeline layout sets bind groups as dirty. If CanInheritBindGroups,
// the first |k| matching bind groups may be inherited.
if (CanInheritBindGroups && mLastAppliedPipelineLayout != nullptr) {
// Dirty bind groups that cannot be inherited.
BindGroupMask dirtiedGroups =
~mPipelineLayout->InheritedGroupsMask(mLastAppliedPipelineLayout);
mDirtyBindGroups |= dirtiedGroups;
mDirtyBindGroupsObjectChangedOrIsDynamic |= dirtiedGroups;
// Clear any bind groups not in the mask.
mDirtyBindGroups &= mBindGroupLayoutsMask;
mDirtyBindGroupsObjectChangedOrIsDynamic &= mBindGroupLayoutsMask;
} else {
mDirtyBindGroups = mBindGroupLayoutsMask;
mDirtyBindGroupsObjectChangedOrIsDynamic = mBindGroupLayoutsMask;
}
}
// The Derived class should call this after it applies bind groups.
void AfterApply() {
// Reset all dirty bind groups. Dirty bind groups not in the bind group layout mask
// will be dirtied again by the next pipeline change.
mDirtyBindGroups.reset();
mDirtyBindGroupsObjectChangedOrIsDynamic.reset();
// Keep track of the last applied pipeline layout. This allows us to avoid computing
// the intersection of the dirty bind groups and bind group layout mask in next Draw
// or Dispatch (which is very hot code) until the layout is changed again.
mLastAppliedPipelineLayout = mPipelineLayout;
}
BindGroupMask mDirtyBindGroups = 0;
BindGroupMask mDirtyBindGroupsObjectChangedOrIsDynamic = 0;
BindGroupMask mBindGroupLayoutsMask = 0;
PerBindGroup<BindGroupBase*> mBindGroups = {};
PerBindGroup<ityp::vector<BindingIndex, DynamicOffset>> mDynamicOffsets = {};
// |mPipelineLayout| is the current pipeline layout set on the command buffer.
// |mLastAppliedPipelineLayout| is the last pipeline layout for which we applied changes
// to the bind group bindings.
PipelineLayoutBase* mPipelineLayout = nullptr;
PipelineLayoutBase* mLastAppliedPipelineLayout = nullptr;
};
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_BINDGROUPTRACKER_H_