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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 <optional>
#include <string>
#include <ui/Transform.h>
#include <utils/StrongPointer.h>
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wconversion"
#pragma clang diagnostic ignored "-Wextra"
#include "DisplayHardware/ComposerHal.h"
#include "DisplayHardware/DisplayIdentification.h"
#include "LayerFE.h"
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic pop // ignored "-Wconversion -Wextra"
namespace android {
namespace HWC2 {
class Layer;
} // namespace HWC2
namespace compositionengine {
class CompositionEngine;
class Output;
namespace impl {
struct OutputLayerCompositionState;
} // namespace impl
/**
* An output layer contains the output-dependent composition state for a layer
*/
class OutputLayer {
public:
virtual ~OutputLayer();
// Sets the HWC2::Layer associated with this layer
virtual void setHwcLayer(std::shared_ptr<HWC2::Layer>) = 0;
// Gets the output which owns this output layer
virtual const Output& getOutput() const = 0;
// Gets the front-end layer interface this output layer represents
virtual LayerFE& getLayerFE() const = 0;
using CompositionState = compositionengine::impl::OutputLayerCompositionState;
// Gets the raw composition state data for the layer
// TODO(lpique): Make this protected once it is only internally called.
virtual const CompositionState& getState() const = 0;
// Allows mutable access to the raw composition state data for the layer.
// This is meant to be used by the various functions that are part of the
// composition process.
// TODO(lpique): Make this protected once it is only internally called.
virtual CompositionState& editState() = 0;
// Recalculates the state of the output layer from the output-independent
// layer. If includeGeometry is false, the geometry state can be skipped.
// internalDisplayRotationFlags must be set to the rotation flags for the
// internal display, and is used to properly compute the inverse-display
// transform, if needed.
virtual void updateCompositionState(
bool includeGeometry, bool forceClientComposition,
ui::Transform::RotationFlags internalDisplayRotationFlags) = 0;
// Writes the geometry state to the HWC, or does nothing if this layer does
// not use the HWC. If includeGeometry is false, the geometry state can be
// skipped. If skipLayer is true, then the alpha of the layer is forced to
// 0 so that HWC will ignore it. z specifies the order to draw the layer in
// (starting with 0 for the back layer, and increasing for each following
// layer). zIsOverridden specifies whether the layer has been reordered.
// isPeekingThrough specifies whether this layer will be shown through a
// hole punch in a layer above it.
virtual void writeStateToHWC(bool includeGeometry, bool skipLayer, uint32_t z,
bool zIsOverridden, bool isPeekingThrough) = 0;
// Updates the cursor position with the HWC
virtual void writeCursorPositionToHWC() const = 0;
// Returns the HWC2::Layer associated with this layer, if it exists
virtual HWC2::Layer* getHwcLayer() const = 0;
// Returns true if the current layer state requires client composition
virtual bool requiresClientComposition() const = 0;
// Returns true if the current layer should be treated as a cursor layer
virtual bool isHardwareCursor() const = 0;
// Applies a HWC device requested composition type change
virtual void applyDeviceCompositionTypeChange(Hwc2::IComposerClient::Composition) = 0;
// Prepares to apply any HWC device layer requests
virtual void prepareForDeviceLayerRequests() = 0;
// Applies a HWC device layer request
virtual void applyDeviceLayerRequest(Hwc2::IComposerClient::LayerRequest request) = 0;
// Returns true if the composition settings scale pixels
virtual bool needsFiltering() const = 0;
// Returns a composition list to be used by RenderEngine if the layer has been overridden
// during the composition process
virtual std::vector<LayerFE::LayerSettings> getOverrideCompositionList() const = 0;
// Debugging
virtual void dump(std::string& result) const = 0;
};
} // namespace compositionengine
} // namespace android
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