DisplayDevice.h revision e60b0687c8d49871d0c8786cabe6851f7a7783b5 
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
33struct ANativeWindow;
34
35namespace android {
36
37class DisplayInfo;
38class FramebufferSurface;
39class LayerBase;
40class SurfaceFlinger;
41
42class DisplayDevice : public LightRefBase<DisplayDevice>
43{
44public:
45    // region in layer-stack space
46    mutable Region dirtyRegion;
47    // region in screen space
48    mutable Region swapRegion;
49    // region in screen space
50    Region undefinedRegion;
51
52    enum {
53        DISPLAY_ID_MAIN = 0,
54        DISPLAY_ID_HDMI = 1,
55        DISPLAY_ID_COUNT
56    };
57
58    enum {
59        PARTIAL_UPDATES = 0x00020000, // video driver feature
60        SWAP_RECTANGLE  = 0x00080000,
61    };
62
63    DisplayDevice(
64            const sp<SurfaceFlinger>& flinger,
65            int32_t dpy, int32_t hwcDisplayId,
66            const sp<ANativeWindow>& nativeWindow,
67            const sp<FramebufferSurface>& framebufferSurface,
68            EGLConfig config);
69
70    ~DisplayDevice();
71
72    // whether this is a valid object. An invalid DisplayDevice is returned
73    // when an non existing id is requested
74    bool isValid() const;
75
76    // Flip the front and back buffers if the back buffer is "dirty".  Might
77    // be instantaneous, might involve copying the frame buffer around.
78    void flip(const Region& dirty) const;
79
80    int         getWidth() const;
81    int         getHeight() const;
82    PixelFormat getFormat() const;
83    uint32_t    getFlags() 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    Region                  getDirtyRegion(bool repaintEverything) const;
91
92    status_t                setOrientation(int orientation);
93    void                    setLayerStack(uint32_t stack);
94
95    int                     getOrientation() const { return mOrientation; }
96    const Transform&        getTransform() const { return mGlobalTransform; }
97    uint32_t                getLayerStack() const { return mLayerStack; }
98    int32_t                 getDisplayId() const { return mId; }
99    int32_t                 getHwcDisplayId() const { return mHwcDisplayId; }
100
101    status_t compositionComplete() const;
102
103    Rect getBounds() const {
104        return Rect(mDisplayWidth, mDisplayHeight);
105    }
106    inline Rect bounds() const { return getBounds(); }
107
108    static void makeCurrent(const sp<const DisplayDevice>& hw, EGLContext ctx);
109
110    /* ------------------------------------------------------------------------
111     * blank / unplank management
112     */
113    void releaseScreen() const;
114    void acquireScreen() const;
115    bool isScreenAcquired() const;
116    bool canDraw() const;
117
118    /* ------------------------------------------------------------------------
119     * Debugging
120     */
121    uint32_t getPageFlipCount() const;
122    void dump(String8& res) const;
123
124    inline bool operator < (const DisplayDevice& rhs) const {
125        return mId < rhs.mId;
126    }
127
128private:
129    void init(EGLConfig config);
130
131    /*
132     *  Constants, set during initialization
133     */
134    sp<SurfaceFlinger> mFlinger;
135    int32_t mId;
136    int32_t mHwcDisplayId;
137
138    // ANativeWindow this display is rendering into
139    sp<ANativeWindow> mNativeWindow;
140
141    // set if mNativeWindow is a FramebufferSurface
142    sp<FramebufferSurface> mFramebufferSurface;
143
144    EGLDisplay      mDisplay;
145    EGLSurface      mSurface;
146    EGLContext      mContext;
147    int             mDisplayWidth;
148    int             mDisplayHeight;
149    PixelFormat     mFormat;
150    uint32_t        mFlags;
151    mutable uint32_t mPageFlipCount;
152
153    /*
154     * Can only accessed from the main thread, these members
155     * don't need synchronization.
156     */
157
158    // list of visible layers on that display
159    Vector< sp<LayerBase> > mVisibleLayersSortedByZ;
160
161    // Whether we have a visible secure layer on this display
162    bool mSecureLayerVisible;
163
164    // Whether the screen is blanked;
165    mutable int mScreenAcquired;
166
167
168    /*
169     * Transaction state
170     */
171    static status_t orientationToTransfrom(int orientation, int w, int h,
172            Transform* tr);
173    Transform mGlobalTransform;
174    int mOrientation;
175    uint32_t mLayerStack;
176};
177
178}; // namespace android
179
180#endif // ANDROID_DISPLAY_DEVICE_H
181