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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSGLDISPLAY_H
     18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSGLDISPLAY_H
     19 
     20 #include <android/hardware/automotive/evs/1.0/IEvsDisplay.h>
     21 #include <ui/GraphicBuffer.h>
     22 
     23 #include "GlWrapper.h"
     24 
     25 
     26 namespace android {
     27 namespace hardware {
     28 namespace automotive {
     29 namespace evs {
     30 namespace V1_0 {
     31 namespace implementation {
     32 
     33 
     34 class EvsGlDisplay : public IEvsDisplay {
     35 public:
     36     // Methods from ::android::hardware::automotive::evs::V1_0::IEvsDisplay follow.
     37     Return<void> getDisplayInfo(getDisplayInfo_cb _hidl_cb)  override;
     38     Return<EvsResult> setDisplayState(DisplayState state)  override;
     39     Return<DisplayState> getDisplayState()  override;
     40     Return<void> getTargetBuffer(getTargetBuffer_cb _hidl_cb)  override;
     41     Return<EvsResult> returnTargetBufferForDisplay(const BufferDesc& buffer)  override;
     42 
     43     // Implementation details
     44     EvsGlDisplay();
     45     virtual ~EvsGlDisplay() override;
     46 
     47     void forceShutdown();   // This gets called if another caller "steals" ownership of the display
     48 
     49 private:
     50     DisplayDesc     mInfo           = {};
     51     BufferDesc      mBuffer         = {};       // A graphics buffer into which we'll store images
     52 
     53     bool            mFrameBusy      = false;    // A flag telling us our buffer is in use
     54     DisplayState    mRequestedState = DisplayState::NOT_VISIBLE;
     55 
     56     GlWrapper       mGlWrapper;
     57 
     58     std::mutex      mAccessLock;
     59 };
     60 
     61 } // namespace implementation
     62 } // namespace V1_0
     63 } // namespace evs
     64 } // namespace automotive
     65 } // namespace hardware
     66 } // namespace android
     67 
     68 #endif  // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSGLDISPLAY_H
     69