HWComposer.h revision 1d6c0e979e7e2a490d7403acd7e966da0e642973 
1/*
2 * Copyright (C) 2010 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 USE_HWC2
18#include "HWComposer_hwc1.h"
19#else
20
21#ifndef ANDROID_SF_HWCOMPOSER_H
22#define ANDROID_SF_HWCOMPOSER_H
23
24#include "HWC2.h"
25
26#include <stdint.h>
27#include <sys/types.h>
28
29#include <ui/Fence.h>
30
31#include <utils/BitSet.h>
32#include <utils/Condition.h>
33#include <utils/Mutex.h>
34#include <utils/StrongPointer.h>
35#include <utils/Thread.h>
36#include <utils/Timers.h>
37#include <utils/Vector.h>
38
39#include <memory>
40#include <set>
41#include <vector>
42
43extern "C" int clock_nanosleep(clockid_t clock_id, int flags,
44                           const struct timespec *request,
45                           struct timespec *remain);
46
47struct framebuffer_device_t;
48
49namespace HWC2 {
50    class Device;
51    class Display;
52}
53
54namespace android {
55// ---------------------------------------------------------------------------
56
57class DisplayDevice;
58class Fence;
59class FloatRect;
60class GraphicBuffer;
61class HWC2On1Adapter;
62class NativeHandle;
63class Region;
64class String8;
65class SurfaceFlinger;
66
67class HWComposer
68{
69public:
70    class EventHandler {
71        friend class HWComposer;
72        virtual void onVSyncReceived(int32_t disp, nsecs_t timestamp) = 0;
73        virtual void onHotplugReceived(int32_t disp, bool connected) = 0;
74    protected:
75        virtual ~EventHandler() {}
76    };
77
78    HWComposer(const sp<SurfaceFlinger>& flinger);
79
80    ~HWComposer();
81
82    void setEventHandler(EventHandler* handler);
83
84    // Attempts to allocate a virtual display. If the virtual display is created
85    // on the HWC device, outId will contain its HWC ID.
86    status_t allocateVirtualDisplay(uint32_t width, uint32_t height,
87            android_pixel_format_t* format, int32_t* outId);
88
89    // Attempts to create a new layer on this display
90    std::shared_ptr<HWC2::Layer> createLayer(int32_t displayId);
91
92    // Asks the HAL what it can do
93    status_t prepare(DisplayDevice& displayDevice);
94
95    status_t setClientTarget(int32_t displayId, const sp<Fence>& acquireFence,
96            const sp<GraphicBuffer>& target, android_dataspace_t dataspace);
97
98    // Finalize the layers and present them
99    status_t commit(int32_t displayId);
100
101    // set power mode
102    status_t setPowerMode(int32_t displayId, int mode);
103
104    // set active config
105    status_t setActiveConfig(int32_t displayId, size_t configId);
106
107    // reset state when an external, non-virtual display is disconnected
108    void disconnectDisplay(int32_t displayId);
109
110    // does this display have layers handled by HWC
111    bool hasDeviceComposition(int32_t displayId) const;
112
113    // does this display have layers handled by GLES
114    bool hasClientComposition(int32_t displayId) const;
115
116    // get the retire fence for the previous frame (i.e., corresponding to the
117    // last call to presentDisplay
118    sp<Fence> getRetireFence(int32_t displayId) const;
119
120    // Get last release fence for the given layer
121    sp<Fence> getLayerReleaseFence(int32_t displayId,
122            const std::shared_ptr<HWC2::Layer>& layer) const;
123
124    // Set the output buffer and acquire fence for a virtual display.
125    // Returns INVALID_OPERATION if displayId is not a virtual display.
126    status_t setOutputBuffer(int32_t displayId, const sp<Fence>& acquireFence,
127            const sp<GraphicBuffer>& buf);
128
129    // After SurfaceFlinger has retrieved the release fences for all the frames,
130    // it can call this to clear the shared pointers in the release fence map
131    void clearReleaseFences(int32_t displayId);
132
133    // Returns the HDR capabilities of the given display
134    std::unique_ptr<HdrCapabilities> getHdrCapabilities(int32_t displayId);
135
136    // Events handling ---------------------------------------------------------
137
138    void setVsyncEnabled(int32_t disp, HWC2::Vsync enabled);
139
140    // Query display parameters.  Pass in a display index (e.g.
141    // HWC_DISPLAY_PRIMARY).
142    nsecs_t getRefreshTimestamp(int32_t disp) const;
143    bool isConnected(int32_t disp) const;
144
145    // Non-const because it can update configMap inside of mDisplayData
146    std::vector<std::shared_ptr<const HWC2::Display::Config>>
147            getConfigs(int32_t displayId) const;
148
149    std::shared_ptr<const HWC2::Display::Config>
150            getActiveConfig(int32_t displayId) const;
151
152    // for debugging ----------------------------------------------------------
153    void dump(String8& out) const;
154
155private:
156    static const int32_t VIRTUAL_DISPLAY_ID_BASE = 2;
157
158    void loadHwcModule();
159
160    bool isValidDisplay(int32_t displayId) const;
161    static void validateChange(HWC2::Composition from, HWC2::Composition to);
162
163    struct cb_context;
164
165    void invalidate(const std::shared_ptr<HWC2::Display>& display);
166    void vsync(const std::shared_ptr<HWC2::Display>& display,
167            int64_t timestamp);
168    void hotplug(const std::shared_ptr<HWC2::Display>& display,
169            HWC2::Connection connected);
170
171    struct DisplayData {
172        DisplayData();
173        ~DisplayData();
174        void reset();
175
176        bool hasClientComposition;
177        bool hasDeviceComposition;
178        std::shared_ptr<HWC2::Display> hwcDisplay;
179        HWC2::DisplayRequest displayRequests;
180        sp<Fence> lastRetireFence;  // signals when the last set op retires
181        std::unordered_map<std::shared_ptr<HWC2::Layer>, sp<Fence>>
182                releaseFences;
183        buffer_handle_t outbufHandle;
184        sp<Fence> outbufAcquireFence;
185        mutable std::unordered_map<int32_t,
186                std::shared_ptr<const HWC2::Display::Config>> configMap;
187
188        // protected by mVsyncLock
189        HWC2::Vsync vsyncEnabled;
190    };
191
192    sp<SurfaceFlinger>              mFlinger;
193    std::unique_ptr<HWC2On1Adapter> mAdapter;
194    std::unique_ptr<HWC2::Device>   mHwcDevice;
195    std::vector<DisplayData>        mDisplayData;
196    std::set<size_t>                mFreeDisplaySlots;
197    std::unordered_map<hwc2_display_t, int32_t> mHwcDisplaySlots;
198    // protect mDisplayData from races between prepare and dump
199    mutable Mutex mDisplayLock;
200
201    cb_context*                     mCBContext;
202    EventHandler*                   mEventHandler;
203    size_t                          mVSyncCounts[HWC_NUM_PHYSICAL_DISPLAY_TYPES];
204    uint32_t                        mRemainingHwcVirtualDisplays;
205
206    // protected by mLock
207    mutable Mutex mLock;
208    mutable std::unordered_map<int32_t, nsecs_t> mLastHwVSync;
209
210    // thread-safe
211    mutable Mutex mVsyncLock;
212};
213
214// ---------------------------------------------------------------------------
215}; // namespace android
216
217#endif // ANDROID_SF_HWCOMPOSER_H
218
219#endif // #ifdef USE_HWC2
220