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/*
* Copyright 2021 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.
*/
#ifndef ANDROID_HWC_HOSTCOMPOSER_H
#define ANDROID_HWC_HOSTCOMPOSER_H
#include <android-base/unique_fd.h>
#include <tuple>
#include <vector>
#include "Common.h"
#include "Composer.h"
#include "DrmPresenter.h"
#include "FencedBuffer.h"
#include "HostConnection.h"
namespace android {
class HostComposer : public Composer {
public:
HostComposer(DrmPresenter* drmPresenter, bool isMinigbm);
HostComposer(const HostComposer&) = delete;
HostComposer& operator=(const HostComposer&) = delete;
HostComposer(HostComposer&&) = delete;
HostComposer& operator=(HostComposer&&) = delete;
HWC2::Error init() override;
HWC2::Error onDisplayCreate(Display* display) override;
HWC2::Error onDisplayDestroy(Display* display) override;
HWC2::Error onDisplayClientTargetSet(Display* display) override;
// Determines if this composer can compose the given layers on the given
// display and requests changes for layers that can't not be composed.
HWC2::Error validateDisplay(
Display* display, std::unordered_map<hwc2_layer_t, HWC2::Composition>*
outLayerCompositionChanges) override;
// Performs the actual composition of layers and presents the composed result
// to the display.
std::tuple<HWC2::Error, base::unique_fd> presentDisplay(
Display* display) override;
HWC2::Error onActiveConfigChange(Display* display) override;
private:
HWC2::Error createHostComposerDisplayInfo(Display* display,
uint32_t hostDisplayId);
void post(HostConnection* hostCon, ExtendedRCEncoderContext* rcEnc,
buffer_handle_t h);
bool mIsMinigbm = false;
int mSyncDeviceFd = -1;
class CompositionResultBuffer {
public:
static std::unique_ptr<CompositionResultBuffer> create(int32_t width,
int32_t height);
static std::unique_ptr<CompositionResultBuffer> createWithDrmBuffer(
int32_t width, int32_t height, DrmPresenter&);
~CompositionResultBuffer();
DrmBuffer& waitAndGetDrmBuffer();
buffer_handle_t waitAndGetBufferHandle();
bool isReady() const;
void setFence(base::unique_fd fence);
private:
CompositionResultBuffer() = default;
void waitForFence();
std::unique_ptr<FencedBuffer> mFencedBuffer;
// Drm info for the additional composition result buffer.
std::unique_ptr<DrmBuffer> mDrmBuffer;
};
class HostComposerDisplayInfo {
public:
HostComposerDisplayInfo() = default;
void resetCompositionResultBuffers(
std::vector<std::unique_ptr<CompositionResultBuffer>>);
CompositionResultBuffer& getNextCompositionResultBuffer();
uint32_t hostDisplayId = 0;
// Drm info for the displays client target buffer.
std::unique_ptr<DrmBuffer> clientTargetDrmBuffer;
private:
// Additional per display buffer for the composition result.
std::vector<std::unique_ptr<CompositionResultBuffer>>
compositionResultBuffers;
};
std::unordered_map<hwc2_display_t, HostComposerDisplayInfo> mDisplayInfos;
DrmPresenter* mDrmPresenter;
};
} // namespace android
#endif
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