DisplayDevice.h revision c1c05de415854eb7a13a16b7e22a22de8515123a 
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/String8.h>
30#include <utils/Timers.h>
31
32#include <hardware/hwcomposer_defs.h>
33
34#include "Transform.h"
35
36struct ANativeWindow;
37
38namespace android {
39
40class DisplayInfo;
41class DisplaySurface;
42class IGraphicBufferProducer;
43class Layer;
44class SurfaceFlinger;
45class HWComposer;
46
47class DisplayDevice : public LightRefBase<DisplayDevice>
48{
49public:
50    // region in layer-stack space
51    mutable Region dirtyRegion;
52    // region in screen space
53    mutable Region swapRegion;
54    // region in screen space
55    Region undefinedRegion;
56
57    enum DisplayType {
58        DISPLAY_ID_INVALID = -1,
59        DISPLAY_PRIMARY     = HWC_DISPLAY_PRIMARY,
60        DISPLAY_EXTERNAL    = HWC_DISPLAY_EXTERNAL,
61        DISPLAY_VIRTUAL     = HWC_DISPLAY_VIRTUAL,
62        NUM_BUILTIN_DISPLAY_TYPES = HWC_NUM_PHYSICAL_DISPLAY_TYPES,
63    };
64
65    enum {
66        PARTIAL_UPDATES = 0x00020000, // video driver feature
67        SWAP_RECTANGLE  = 0x00080000,
68    };
69
70    enum {
71        NO_LAYER_STACK = 0xFFFFFFFF,
72    };
73
74    DisplayDevice(
75            const sp<SurfaceFlinger>& flinger,
76            DisplayType type,
77            int32_t hwcId,  // negative for non-HWC-composited displays
78            bool isSecure,
79            const wp<IBinder>& displayToken,
80            const sp<DisplaySurface>& displaySurface,
81            const sp<IGraphicBufferProducer>& producer,
82            EGLConfig config);
83
84    ~DisplayDevice();
85
86    // whether this is a valid object. An invalid DisplayDevice is returned
87    // when an non existing id is requested
88    bool isValid() const;
89
90    // isSecure indicates whether this display can be trusted to display
91    // secure surfaces.
92    bool isSecure() const { return mIsSecure; }
93
94    // Flip the front and back buffers if the back buffer is "dirty".  Might
95    // be instantaneous, might involve copying the frame buffer around.
96    void flip(const Region& dirty) const;
97
98    int         getWidth() const;
99    int         getHeight() const;
100    PixelFormat getFormat() const;
101    uint32_t    getFlags() const;
102
103    EGLSurface  getEGLSurface() const;
104
105    void                    setVisibleLayersSortedByZ(const Vector< sp<Layer> >& layers);
106    const Vector< sp<Layer> >& getVisibleLayersSortedByZ() const;
107    bool                    getSecureLayerVisible() const;
108    Region                  getDirtyRegion(bool repaintEverything) const;
109
110    void                    setLayerStack(uint32_t stack);
111    void                    setProjection(int orientation, const Rect& viewport, const Rect& frame);
112
113    int                     getOrientation() const { return mOrientation; }
114    uint32_t                getOrientationTransform() const;
115    const Transform&        getTransform() const { return mGlobalTransform; }
116    const Rect              getViewport() const { return mViewport; }
117    const Rect              getFrame() const { return mFrame; }
118    const Rect&             getScissor() const { return mScissor; }
119    bool                    needsFiltering() const { return mNeedsFiltering; }
120
121    uint32_t                getLayerStack() const { return mLayerStack; }
122    int32_t                 getDisplayType() const { return mType; }
123    int32_t                 getHwcDisplayId() const { return mHwcDisplayId; }
124    const wp<IBinder>&      getDisplayToken() const { return mDisplayToken; }
125
126    status_t beginFrame() const;
127    status_t prepareFrame(const HWComposer& hwc) const;
128
129    void swapBuffers(HWComposer& hwc) const;
130    status_t compositionComplete() const;
131
132    // called after h/w composer has completed its set() call
133    void onSwapBuffersCompleted(HWComposer& hwc) const;
134
135    Rect getBounds() const {
136        return Rect(mDisplayWidth, mDisplayHeight);
137    }
138    inline Rect bounds() const { return getBounds(); }
139
140    void setDisplayName(const String8& displayName);
141    const String8& getDisplayName() const { return mDisplayName; }
142
143    EGLBoolean makeCurrent(EGLDisplay dpy, EGLContext ctx) const;
144    void setViewportAndProjection() const;
145
146    /* ------------------------------------------------------------------------
147     * blank / unblank management
148     */
149    void releaseScreen() const;
150    void acquireScreen() const;
151    bool isScreenAcquired() const;
152    bool canDraw() const;
153
154    // release HWC resources (if any) for removable displays
155    void disconnect(HWComposer& hwc);
156
157    /* ------------------------------------------------------------------------
158     * Debugging
159     */
160    uint32_t getPageFlipCount() const;
161    void dump(String8& result) const;
162
163private:
164    /*
165     *  Constants, set during initialization
166     */
167    sp<SurfaceFlinger> mFlinger;
168    DisplayType mType;
169    int32_t mHwcDisplayId;
170    wp<IBinder> mDisplayToken;
171
172    // ANativeWindow this display is rendering into
173    sp<ANativeWindow> mNativeWindow;
174    sp<DisplaySurface> mDisplaySurface;
175
176    EGLDisplay      mDisplay;
177    EGLSurface      mSurface;
178    int             mDisplayWidth;
179    int             mDisplayHeight;
180    PixelFormat     mFormat;
181    uint32_t        mFlags;
182    mutable uint32_t mPageFlipCount;
183    String8         mDisplayName;
184    bool            mIsSecure;
185
186    /*
187     * Can only accessed from the main thread, these members
188     * don't need synchronization.
189     */
190
191    // list of visible layers on that display
192    Vector< sp<Layer> > mVisibleLayersSortedByZ;
193
194    // Whether we have a visible secure layer on this display
195    bool mSecureLayerVisible;
196
197    // Whether the screen is blanked;
198    mutable int mScreenAcquired;
199
200
201    /*
202     * Transaction state
203     */
204    static status_t orientationToTransfrom(int orientation,
205            int w, int h, Transform* tr);
206
207    uint32_t mLayerStack;
208    int mOrientation;
209    // user-provided visible area of the layer stack
210    Rect mViewport;
211    // user-provided rectangle where mViewport gets mapped to
212    Rect mFrame;
213    // pre-computed scissor to apply to the display
214    Rect mScissor;
215    Transform mGlobalTransform;
216    bool mNeedsFiltering;
217};
218
219}; // namespace android
220
221#endif // ANDROID_DISPLAY_DEVICE_H
222