c7d14e2471
This is useful in various situations, for instance if the HAL wants to change its compositing strategy. Bug: 4488017 Change-Id: I5afc14e5917c6db7926d7417d48677d5aba50caa
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_DISPLAY_HARDWARE_BASE_H
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#define ANDROID_DISPLAY_HARDWARE_BASE_H
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#include <stdint.h>
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#include <utils/RefBase.h>
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#include <utils/threads.h>
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#include <linux/kd.h>
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#include <linux/vt.h>
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#include "Barrier.h"
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namespace android {
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class SurfaceFlinger;
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class DisplayHardwareBase
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{
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public:
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DisplayHardwareBase(
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const sp<SurfaceFlinger>& flinger,
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uint32_t displayIndex);
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~DisplayHardwareBase();
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// console management
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void releaseScreen() const;
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void acquireScreen() const;
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bool isScreenAcquired() const;
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bool canDraw() const;
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void setCanDraw(bool canDraw);
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private:
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class DisplayEventThreadBase : public Thread {
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protected:
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wp<SurfaceFlinger> mFlinger;
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public:
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DisplayEventThreadBase(const sp<SurfaceFlinger>& flinger);
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virtual ~DisplayEventThreadBase();
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virtual void onFirstRef() {
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run("DisplayEventThread", PRIORITY_URGENT_DISPLAY);
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}
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virtual status_t acquireScreen() const { return NO_ERROR; };
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virtual status_t releaseScreen() const { return NO_ERROR; };
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virtual status_t initCheck() const = 0;
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};
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class DisplayEventThread : public DisplayEventThreadBase
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{
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mutable Barrier mBarrier;
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public:
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DisplayEventThread(const sp<SurfaceFlinger>& flinger);
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virtual ~DisplayEventThread();
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virtual bool threadLoop();
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virtual status_t readyToRun();
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virtual status_t releaseScreen() const;
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virtual status_t initCheck() const;
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};
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sp<DisplayEventThreadBase> mDisplayEventThread;
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mutable int mCanDraw;
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mutable int mScreenAcquired;
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};
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}; // namespace android
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#endif // ANDROID_DISPLAY_HARDWARE_BASE_H
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