DisplayDevice.h revision a49126087b4494f4ef50873f3a3f6727265f6621 
1/*
2 * Copyright (C) 2007 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_DISPLAY_HARDWARE_H
18#define ANDROID_DISPLAY_HARDWARE_H
19
20#include <stdlib.h>
21
22#include <ui/PixelFormat.h>
23#include <ui/Region.h>
24
25#include <GLES/gl.h>
26#include <GLES/glext.h>
27#include <EGL/egl.h>
28#include <EGL/eglext.h>
29
30#include "Transform.h"
31
32#include "DisplayHardware/DisplayHardwareBase.h"
33#include "DisplayHardware/HWComposer.h"
34#include "DisplayHardware/PowerHAL.h"
35
36namespace android {
37
38class FramebufferSurface;
39class SurfaceTextureClient;
40
41class DisplayHardware :
42    public DisplayHardwareBase,
43    public HWComposer::EventHandler
44{
45public:
46
47    class VSyncHandler : virtual public RefBase {
48        friend class DisplayHardware;
49        virtual void onVSyncReceived(int dpy, nsecs_t timestamp) = 0;
50    protected:
51        virtual ~VSyncHandler() {}
52    };
53
54    enum {
55        PARTIAL_UPDATES             = 0x00020000,   // video driver feature
56        SWAP_RECTANGLE              = 0x00080000,
57    };
58
59    DisplayHardware(
60            const sp<SurfaceFlinger>& flinger,
61            int dpy,
62            const sp<SurfaceTextureClient>& surface,
63            EGLConfig config);
64
65    virtual ~DisplayHardware();
66
67    void releaseScreen() const;
68    void acquireScreen() const;
69
70    // Flip the front and back buffers if the back buffer is "dirty".  Might
71    // be instantaneous, might involve copying the frame buffer around.
72    void flip(const Region& dirty) const;
73
74    float       getDpiX() const;
75    float       getDpiY() const;
76    float       getRefreshRate() const;
77    float       getDensity() const;
78    int         getWidth() const;
79    int         getHeight() const;
80    PixelFormat getFormat() const;
81    uint32_t    getFlags() const;
82    nsecs_t     getRefreshPeriod() const;
83    nsecs_t     getRefreshTimestamp() const;
84
85    EGLSurface  getEGLSurface() const;
86
87    void                    setVisibleLayersSortedByZ(const Vector< sp<LayerBase> >& layers);
88    Vector< sp<LayerBase> > getVisibleLayersSortedByZ() const;
89    bool                    getSecureLayerVisible() const;
90
91    status_t                setOrientation(int orientation);
92    int                     getOrientation() const { return mOrientation; }
93    const Transform&        getTransform() const { return mGlobalTransform; }
94    int                     getUserWidth() const { return mUserDisplayWidth; }
95    int                     getUserHeight() const { return mUserDisplayHeight; }
96
97    void setVSyncHandler(const sp<VSyncHandler>& handler);
98
99    enum {
100        EVENT_VSYNC = HWC_EVENT_VSYNC
101    };
102
103    void eventControl(int event, int enabled);
104
105
106    uint32_t getPageFlipCount() const;
107    EGLDisplay getEGLDisplay() const { return mDisplay; }
108
109    void dump(String8& res) const;
110
111    // Hardware Composer
112    HWComposer& getHwComposer() const;
113
114    status_t compositionComplete() const;
115
116    Rect getBounds() const {
117        return Rect(mDisplayWidth, mDisplayHeight);
118    }
119    inline Rect bounds() const { return getBounds(); }
120
121private:
122    void init(EGLConfig config);
123
124    virtual void onVSyncReceived(int dpy, nsecs_t timestamp);
125
126    /*
127     *  Constants, set during initialization
128     */
129    sp<SurfaceFlinger> mFlinger;
130    int mDisplayId;
131    HWComposer* mHwc;
132    PowerHAL mPowerHAL;
133    // ANativeWindow this display is rendering into
134    sp<SurfaceTextureClient> mNativeWindow;
135    // set if mNativeWindow is a FramebufferSurface
136    sp<FramebufferSurface> mFramebufferSurface;
137
138
139    EGLDisplay      mDisplay;
140    EGLSurface      mSurface;
141    EGLContext      mContext;
142    float           mDpiX;
143    float           mDpiY;
144    float           mRefreshRate;
145    float           mDensity;
146    int             mDisplayWidth;
147    int             mDisplayHeight;
148    PixelFormat     mFormat;
149    uint32_t        mFlags;
150    mutable uint32_t mPageFlipCount;
151
152    nsecs_t         mRefreshPeriod;
153    mutable nsecs_t mLastHwVSync;
154
155
156    /*
157     * Can only accessed from the main thread, these members
158     * don't need synchronization.
159     */
160    // list of visible layers on that display
161    Vector< sp<LayerBase> > mVisibleLayersSortedByZ;
162    // Whether we have a visible secure layer on this display
163    bool mSecureLayerVisible;
164
165
166    // this used to be in GraphicPlane
167    static status_t orientationToTransfrom(int orientation, int w, int h,
168            Transform* tr);
169    Transform               mGlobalTransform;
170    Transform               mDisplayTransform;
171    int                     mOrientation;
172    int                     mLogicalDisplayWidth;
173    int                     mLogicalDisplayHeight;
174    int                     mUserDisplayWidth;
175    int                     mUserDisplayHeight;
176
177    mutable Mutex   mLock;
178
179    /*
180     *  protected by mLock
181     */
182    wp<VSyncHandler>    mVSyncHandler;
183};
184
185}; // namespace android
186
187#endif // ANDROID_DISPLAY_HARDWARE_H
188