DisplayDevice.h revision 888c822c4cb6976aab9256c58bae9e17e3e55c5c 
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_DEVICE_H
18#define ANDROID_DISPLAY_DEVICE_H
19
20#include <stdlib.h>
21
22#include <ui/PixelFormat.h>
23#include <ui/Region.h>
24
25#include <EGL/egl.h>
26#include <EGL/eglext.h>
27
28#include <utils/Mutex.h>
29#include <utils/Timers.h>
30
31#include "Transform.h"
32
33namespace android {
34
35class DisplayInfo;
36class FramebufferSurface;
37class LayerBase;
38class SurfaceFlinger;
39class SurfaceTextureClient;
40
41class DisplayDevice
42{
43public:
44    // region in layer-stack space
45    mutable Region dirtyRegion;
46    // region in screen space
47    mutable Region swapRegion;
48    // region in screen space
49    Region undefinedRegion;
50
51    enum {
52        DISPLAY_ID_MAIN = 0,
53        DISPLAY_ID_HDMI = 1
54    };
55
56    enum {
57        PARTIAL_UPDATES = 0x00020000, // video driver feature
58        SWAP_RECTANGLE  = 0x00080000,
59    };
60
61    DisplayDevice();
62
63    DisplayDevice(
64            const sp<SurfaceFlinger>& flinger,
65            int dpy,
66            const sp<SurfaceTextureClient>& surface,
67            EGLConfig config);
68
69    ~DisplayDevice();
70
71    // must be called when this object is no longer needed. this will
72    // render the associated EGLSurface invalid.
73    void terminate();
74
75    // whether this is a valid object. An invalid DisplayDevice is returned
76    // when an non existing id is requested
77    bool isValid() const;
78
79    // Flip the front and back buffers if the back buffer is "dirty".  Might
80    // be instantaneous, might involve copying the frame buffer around.
81    void flip(const Region& dirty) const;
82
83    float       getDpiX() const;
84    float       getDpiY() const;
85    float       getDensity() const;
86    int         getWidth() const;
87    int         getHeight() const;
88    PixelFormat getFormat() const;
89    uint32_t    getFlags() const;
90
91    EGLSurface  getEGLSurface() const;
92
93    void                    setVisibleLayersSortedByZ(const Vector< sp<LayerBase> >& layers);
94    Vector< sp<LayerBase> > getVisibleLayersSortedByZ() const;
95    bool                    getSecureLayerVisible() const;
96
97    status_t                setOrientation(int orientation);
98    int                     getOrientation() const { return mOrientation; }
99    const Transform&        getTransform() const { return mGlobalTransform; }
100    uint32_t                getLayerStack() const { return mLayerStack; }
101
102    status_t compositionComplete() const;
103
104    Rect getBounds() const {
105        return Rect(mDisplayWidth, mDisplayHeight);
106    }
107    inline Rect bounds() const { return getBounds(); }
108
109    static void makeCurrent(const DisplayDevice& hw, EGLContext ctx);
110
111    /* ------------------------------------------------------------------------
112     * blank / unplank management
113     */
114    void releaseScreen() const;
115    void acquireScreen() const;
116    bool isScreenAcquired() const;
117    bool canDraw() const;
118
119    /* ------------------------------------------------------------------------
120     * Debugging
121     */
122    uint32_t getPageFlipCount() const;
123    void dump(String8& res) const;
124
125    inline bool operator < (const DisplayDevice& rhs) const {
126        return mId < rhs.mId;
127    }
128
129private:
130    void init(EGLConfig config);
131
132    /*
133     *  Constants, set during initialization
134     */
135    sp<SurfaceFlinger> mFlinger;
136    int32_t mId;
137
138    // ANativeWindow this display is rendering into
139    sp<SurfaceTextureClient> mNativeWindow;
140
141    // set if mNativeWindow is a FramebufferSurface
142    sp<FramebufferSurface> mFramebufferSurface;
143
144    EGLDisplay      mDisplay;
145    EGLSurface      mSurface;
146    EGLContext      mContext;
147    float           mDpiX;
148    float           mDpiY;
149    float           mDensity;
150    int             mDisplayWidth;
151    int             mDisplayHeight;
152    PixelFormat     mFormat;
153    uint32_t        mFlags;
154    mutable uint32_t mPageFlipCount;
155
156    /*
157     * Can only accessed from the main thread, these members
158     * don't need synchronization.
159     */
160
161    // list of visible layers on that display
162    Vector< sp<LayerBase> > mVisibleLayersSortedByZ;
163
164    // Whether we have a visible secure layer on this display
165    bool mSecureLayerVisible;
166
167    // Whether the screen is blanked;
168    mutable int mScreenAcquired;
169
170
171    /*
172     * Transaction state
173     */
174    static status_t orientationToTransfrom(int orientation, int w, int h,
175            Transform* tr);
176    Transform mGlobalTransform;
177    int mOrientation;
178    uint32_t mLayerStack;
179};
180
181}; // namespace android
182
183#endif // ANDROID_DISPLAY_DEVICE_H
184