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/*
* Copyright 2019 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <cstdint>
#include <memory>
#include <string>
#include <compositionengine/LayerFE.h>
#include <compositionengine/OutputLayer.h>
#include <ui/FloatRect.h>
#include <ui/Rect.h>
#include "DisplayHardware/DisplayIdentification.h"
namespace android::compositionengine {
struct LayerFECompositionState;
namespace impl {
// The implementation class contains the common implementation, but does not
// actually contain the final layer state.
class OutputLayer : public virtual compositionengine::OutputLayer {
public:
~OutputLayer() override;
void setHwcLayer(std::shared_ptr<HWC2::Layer>) override;
void updateCompositionState(bool includeGeometry, bool forceClientComposition,
ui::Transform::RotationFlags) override;
void writeStateToHWC(bool includeGeometry, bool skipLayer, uint32_t z, bool zIsOverridden,
bool isPeekingThrough) override;
void writeCursorPositionToHWC() const override;
HWC2::Layer* getHwcLayer() const override;
bool requiresClientComposition() const override;
bool isHardwareCursor() const override;
void applyDeviceCompositionTypeChange(Hwc2::IComposerClient::Composition) override;
void prepareForDeviceLayerRequests() override;
void applyDeviceLayerRequest(Hwc2::IComposerClient::LayerRequest request) override;
bool needsFiltering() const override;
std::vector<LayerFE::LayerSettings> getOverrideCompositionList() const override;
void dump(std::string&) const override;
virtual FloatRect calculateOutputSourceCrop() const;
virtual Rect calculateOutputDisplayFrame() const;
virtual uint32_t calculateOutputRelativeBufferTransform(
uint32_t internalDisplayRotationFlags) const;
protected:
// Implemented by the final implementation for the final state it uses.
virtual void dumpState(std::string&) const = 0;
private:
Rect calculateInitialCrop() const;
void writeOutputDependentGeometryStateToHWC(HWC2::Layer*, Hwc2::IComposerClient::Composition,
uint32_t z);
void writeOutputIndependentGeometryStateToHWC(HWC2::Layer*, const LayerFECompositionState&,
bool skipLayer);
void writeOutputDependentPerFrameStateToHWC(HWC2::Layer*);
void writeOutputIndependentPerFrameStateToHWC(HWC2::Layer*, const LayerFECompositionState&,
bool skipLayer);
void writeSolidColorStateToHWC(HWC2::Layer*, const LayerFECompositionState&);
void writeSidebandStateToHWC(HWC2::Layer*, const LayerFECompositionState&);
void writeBufferStateToHWC(HWC2::Layer*, const LayerFECompositionState&, bool skipLayer);
void writeCompositionTypeToHWC(HWC2::Layer*, Hwc2::IComposerClient::Composition,
bool isPeekingThrough, bool skipLayer);
void detectDisallowedCompositionTypeChange(Hwc2::IComposerClient::Composition from,
Hwc2::IComposerClient::Composition to) const;
bool isClientCompositionForced(bool isPeekingThrough) const;
};
// This template factory function standardizes the implementation details of the
// final class using the types actually required by the implementation. This is
// not possible to do in the base class as those types may not even be visible
// to the base code.
template <typename BaseOutputLayer>
std::unique_ptr<BaseOutputLayer> createOutputLayerTemplated(const Output& output,
sp<LayerFE> layerFE) {
class OutputLayer final : public BaseOutputLayer {
public:
// Clang incorrectly complains that these are unused.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-local-typedef"
using OutputLayerCompositionState = std::remove_const_t<
std::remove_reference_t<decltype(std::declval<BaseOutputLayer>().getState())>>;
using Output = std::remove_const_t<
std::remove_reference_t<decltype(std::declval<BaseOutputLayer>().getOutput())>>;
using LayerFE =
std::remove_reference_t<decltype(std::declval<BaseOutputLayer>().getLayerFE())>;
#pragma clang diagnostic pop
OutputLayer(const Output& output, const sp<LayerFE>& layerFE)
: mOutput(output), mLayerFE(layerFE) {}
~OutputLayer() override = default;
private:
// compositionengine::OutputLayer overrides
const Output& getOutput() const override { return mOutput; }
LayerFE& getLayerFE() const override { return *mLayerFE; }
const OutputLayerCompositionState& getState() const override { return mState; }
OutputLayerCompositionState& editState() override { return mState; }
// compositionengine::impl::OutputLayer overrides
void dumpState(std::string& out) const override { mState.dump(out); }
const Output& mOutput;
const sp<LayerFE> mLayerFE;
OutputLayerCompositionState mState;
};
return std::make_unique<OutputLayer>(output, layerFE);
}
std::unique_ptr<OutputLayer> createOutputLayer(const compositionengine::Output&,
const sp<LayerFE>&);
} // namespace impl
} // namespace android::compositionengine
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