DisplayDevice.h revision d3ee231eddce0b69ec5e35188dbd0f4a2c3b9ac3 
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        PARTIAL_UPDATES = 0x00020000, // video driver feature
53        SWAP_RECTANGLE  = 0x00080000,
54    };
55
56    DisplayDevice(
57            const sp<SurfaceFlinger>& flinger,
58            int dpy,
59            const sp<SurfaceTextureClient>& surface,
60            EGLConfig config);
61
62    ~DisplayDevice();
63
64    // Flip the front and back buffers if the back buffer is "dirty".  Might
65    // be instantaneous, might involve copying the frame buffer around.
66    void flip(const Region& dirty) const;
67
68    float       getDpiX() const;
69    float       getDpiY() const;
70    float       getRefreshRate() const;
71    float       getDensity() const;
72    int         getWidth() const;
73    int         getHeight() const;
74    PixelFormat getFormat() const;
75    uint32_t    getFlags() const;
76    nsecs_t     getRefreshPeriod() const;
77    status_t    getInfo(DisplayInfo* info) const;
78
79    EGLSurface  getEGLSurface() const;
80
81    void                    setVisibleLayersSortedByZ(const Vector< sp<LayerBase> >& layers);
82    Vector< sp<LayerBase> > getVisibleLayersSortedByZ() const;
83    bool                    getSecureLayerVisible() const;
84
85    status_t                setOrientation(int orientation);
86    int                     getOrientation() const { return mOrientation; }
87    const Transform&        getTransform() const { return mGlobalTransform; }
88    uint32_t                getLayerStack() const { return mLayerStack; }
89
90    status_t compositionComplete() const;
91
92    Rect getBounds() const {
93        return Rect(mDisplayWidth, mDisplayHeight);
94    }
95    inline Rect bounds() const { return getBounds(); }
96
97    static void makeCurrent(const DisplayDevice& hw, EGLContext ctx);
98
99    /* ------------------------------------------------------------------------
100     * blank / unplank management
101     */
102    void releaseScreen() const;
103    void acquireScreen() const;
104    bool isScreenAcquired() const;
105    bool canDraw() const;
106
107    /* ------------------------------------------------------------------------
108     * Debugging
109     */
110    uint32_t getPageFlipCount() const;
111    void dump(String8& res) const;
112
113
114private:
115    void init(EGLConfig config);
116
117    /*
118     *  Constants, set during initialization
119     */
120    sp<SurfaceFlinger> mFlinger;
121    int mDisplayId;
122
123    // ANativeWindow this display is rendering into
124    sp<SurfaceTextureClient> mNativeWindow;
125
126    // set if mNativeWindow is a FramebufferSurface
127    sp<FramebufferSurface> mFramebufferSurface;
128
129    EGLDisplay      mDisplay;
130    EGLSurface      mSurface;
131    EGLContext      mContext;
132    float           mDpiX;
133    float           mDpiY;
134    float           mRefreshRate;
135    float           mDensity;
136    int             mDisplayWidth;
137    int             mDisplayHeight;
138    PixelFormat     mFormat;
139    uint32_t        mFlags;
140    mutable uint32_t mPageFlipCount;
141    nsecs_t         mRefreshPeriod;
142
143    /*
144     * Can only accessed from the main thread, these members
145     * don't need synchronization.
146     */
147
148    // list of visible layers on that display
149    Vector< sp<LayerBase> > mVisibleLayersSortedByZ;
150
151    // Whether we have a visible secure layer on this display
152    bool mSecureLayerVisible;
153
154    // Whether the screen is blanked;
155    mutable int mScreenAcquired;
156
157
158    /*
159     * Transaction state
160     */
161    static status_t orientationToTransfrom(int orientation, int w, int h,
162            Transform* tr);
163    Transform mGlobalTransform;
164    int mOrientation;
165    uint32_t mLayerStack;
166};
167
168}; // namespace android
169
170#endif // ANDROID_DISPLAY_DEVICE_H
171