ISurfaceComposer.h revision 2d5e230292c27d59f4c096bc742a0a19abf811c1 
1/*
2 * Copyright (C) 2006 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_GUI_ISURFACE_COMPOSER_H
18#define ANDROID_GUI_ISURFACE_COMPOSER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/RefBase.h>
24#include <utils/Errors.h>
25
26#include <binder/IInterface.h>
27
28#include <ui/PixelFormat.h>
29
30#include <gui/IGraphicBufferAlloc.h>
31#include <gui/ISurfaceComposerClient.h>
32
33namespace android {
34// ----------------------------------------------------------------------------
35
36class ComposerState;
37class DisplayState;
38class DisplayInfo;
39class IDisplayEventConnection;
40class IMemoryHeap;
41
42class ISurfaceComposer: public IInterface {
43public:
44    DECLARE_META_INTERFACE(SurfaceComposer);
45
46    // flags for setTransactionState()
47    enum {
48        eSynchronous = 0x01,
49        eAnimation   = 0x02,
50    };
51
52    enum {
53        eDisplayIdMain = 0,
54        eDisplayIdHdmi = 1
55    };
56
57    /* create connection with surface flinger, requires
58     * ACCESS_SURFACE_FLINGER permission
59     */
60    virtual sp<ISurfaceComposerClient> createConnection() = 0;
61
62    /* create a graphic buffer allocator
63     */
64    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc() = 0;
65
66    /* return an IDisplayEventConnection */
67    virtual sp<IDisplayEventConnection> createDisplayEventConnection() = 0;
68
69    /* create a display
70     * requires ACCESS_SURFACE_FLINGER permission.
71     */
72    virtual sp<IBinder> createDisplay(const String8& displayName) = 0;
73
74    /* get the token for the existing default displays. possible values
75     * for id are eDisplayIdMain and eDisplayIdHdmi.
76     */
77    virtual sp<IBinder> getBuiltInDisplay(int32_t id) = 0;
78
79    /* open/close transactions. requires ACCESS_SURFACE_FLINGER permission */
80    virtual void setTransactionState(const Vector<ComposerState>& state,
81            const Vector<DisplayState>& displays, uint32_t flags) = 0;
82
83    /* signal that we're done booting.
84     * Requires ACCESS_SURFACE_FLINGER permission
85     */
86    virtual void bootFinished() = 0;
87
88    /* verify that an ISurfaceTexture was created by SurfaceFlinger.
89     */
90    virtual bool authenticateSurfaceTexture(
91            const sp<ISurfaceTexture>& surface) const = 0;
92
93    /* Capture the specified screen. requires READ_FRAME_BUFFER permission
94     * This function will fail if there is a secure window on screen.
95     */
96    virtual status_t captureScreen(const sp<IBinder>& display, sp<IMemoryHeap>* heap,
97            uint32_t* width, uint32_t* height, PixelFormat* format,
98            uint32_t reqWidth, uint32_t reqHeight,
99            uint32_t minLayerZ, uint32_t maxLayerZ) = 0;
100
101
102    /* triggers screen off and waits for it to complete */
103    virtual void blank(const sp<IBinder>& display) = 0;
104
105    /* triggers screen on and waits for it to complete */
106    virtual void unblank(const sp<IBinder>& display) = 0;
107
108    /* returns information about a display
109     * intended to be used to get information about built-in displays */
110    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info) = 0;
111
112    /* connects to an external display */
113    virtual void connectDisplay(const sp<ISurfaceTexture>& display) = 0;
114};
115
116// ----------------------------------------------------------------------------
117
118class BnSurfaceComposer: public BnInterface<ISurfaceComposer> {
119public:
120    enum {
121        // Note: BOOT_FINISHED must remain this value, it is called from
122        // Java by ActivityManagerService.
123        BOOT_FINISHED = IBinder::FIRST_CALL_TRANSACTION,
124        CREATE_CONNECTION,
125        CREATE_GRAPHIC_BUFFER_ALLOC,
126        CREATE_DISPLAY_EVENT_CONNECTION,
127        CREATE_DISPLAY,
128        GET_BUILT_IN_DISPLAY,
129        SET_TRANSACTION_STATE,
130        AUTHENTICATE_SURFACE,
131        CAPTURE_SCREEN,
132        BLANK,
133        UNBLANK,
134        GET_DISPLAY_INFO,
135        CONNECT_DISPLAY,
136    };
137
138    virtual status_t onTransact(uint32_t code, const Parcel& data,
139            Parcel* reply, uint32_t flags = 0);
140};
141
142// ----------------------------------------------------------------------------
143
144}; // namespace android
145
146#endif // ANDROID_GUI_ISURFACE_COMPOSER_H
147