1 /*
2  * Copyright (C) 2015 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_DRM_DISPLAY_COMPOSITOR_H_
18 #define ANDROID_DRM_DISPLAY_COMPOSITOR_H_
19 
20 #include "drm_hwcomposer.h"
21 #include "drmcomposition.h"
22 #include "drmcompositorworker.h"
23 
24 #include <pthread.h>
25 #include <queue>
26 #include <sstream>
27 
28 #include <hardware/hardware.h>
29 #include <hardware/hwcomposer.h>
30 
31 namespace android {
32 
33 class DrmDisplayCompositor {
34  public:
35   DrmDisplayCompositor();
36   ~DrmDisplayCompositor();
37 
38   int Init(DrmResources *drm, int display);
39 
40   int QueueComposition(std::unique_ptr<DrmDisplayComposition> composition);
41   int Composite();
42   void Dump(std::ostringstream *out) const;
43 
44   bool HaveQueuedComposites() const;
45 
46  private:
47   DrmDisplayCompositor(const DrmDisplayCompositor &) = delete;
48 
49   int ApplyFrame(DrmDisplayComposition *display_comp);
50   int ApplyDpms(DrmDisplayComposition *display_comp);
51 
52   DrmResources *drm_;
53   int display_;
54 
55   DrmCompositorWorker worker_;
56 
57   std::queue<std::unique_ptr<DrmDisplayComposition>> composite_queue_;
58   std::unique_ptr<DrmDisplayComposition> active_composition_;
59 
60   uint64_t frame_no_;
61 
62   bool initialized_;
63   bool active_;
64 
65   // mutable since we need to acquire in HaveQueuedComposites
66   mutable pthread_mutex_t lock_;
67 
68   // State tracking progress since our last Dump(). These are mutable since
69   // we need to reset them on every Dump() call.
70   mutable uint64_t dump_frames_composited_;
71   mutable uint64_t dump_last_timestamp_ns_;
72 };
73 }
74 
75 #endif  // ANDROID_DRM_DISPLAY_COMPOSITOR_H_
76