1 /*
2  * Copyright (C) 2008 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_SF_LAYER_STATE_H
18 #define ANDROID_SF_LAYER_STATE_H
19 
20 #include <stdint.h>
21 #include <sys/types.h>
22 
23 #include <utils/Errors.h>
24 
25 #include <ui/Region.h>
26 #include <ui/Rect.h>
27 
28 namespace android {
29 
30 class Parcel;
31 class ISurfaceComposerClient;
32 
33 /*
34  * Used to communicate layer information between SurfaceFlinger and its clients.
35  */
36 struct layer_state_t {
37 
38 
39     enum {
40         eLayerHidden        = 0x01,     // SURFACE_HIDDEN in SurfaceControl.java
41         eLayerOpaque        = 0x02,     // SURFACE_OPAQUE
42         eLayerSecure        = 0x80,     // SECURE
43     };
44 
45     enum {
46         ePositionChanged            = 0x00000001,
47         eLayerChanged               = 0x00000002,
48         eSizeChanged                = 0x00000004,
49         eAlphaChanged               = 0x00000008,
50         eMatrixChanged              = 0x00000010,
51         eTransparentRegionChanged   = 0x00000020,
52         eFlagsChanged               = 0x00000040,
53         eLayerStackChanged          = 0x00000080,
54         eCropChanged                = 0x00000100,
55     };
56 
layer_state_tlayer_state_t57     layer_state_t()
58         :   what(0),
59             x(0), y(0), z(0), w(0), h(0), layerStack(0),
60             alpha(0), flags(0), mask(0),
61             reserved(0)
62     {
63         matrix.dsdx = matrix.dtdy = 1.0f;
64         matrix.dsdy = matrix.dtdx = 0.0f;
65         crop.makeInvalid();
66     }
67 
68     status_t    write(Parcel& output) const;
69     status_t    read(const Parcel& input);
70 
71             struct matrix22_t {
72                 float   dsdx;
73                 float   dtdx;
74                 float   dsdy;
75                 float   dtdy;
76             };
77             sp<IBinder>     surface;
78             uint32_t        what;
79             float           x;
80             float           y;
81             uint32_t        z;
82             uint32_t        w;
83             uint32_t        h;
84             uint32_t        layerStack;
85             float           alpha;
86             uint8_t         flags;
87             uint8_t         mask;
88             uint8_t         reserved;
89             matrix22_t      matrix;
90             Rect            crop;
91             // non POD must be last. see write/read
92             Region          transparentRegion;
93 };
94 
95 struct ComposerState {
96     sp<ISurfaceComposerClient> client;
97     layer_state_t state;
98     status_t    write(Parcel& output) const;
99     status_t    read(const Parcel& input);
100 };
101 
102 struct DisplayState {
103 
104     enum {
105         eOrientationDefault     = 0,
106         eOrientation90          = 1,
107         eOrientation180         = 2,
108         eOrientation270         = 3,
109         eOrientationUnchanged   = 4,
110         eOrientationSwapMask    = 0x01
111     };
112 
113     enum {
114         eSurfaceChanged             = 0x01,
115         eLayerStackChanged          = 0x02,
116         eDisplayProjectionChanged   = 0x04,
117         eDisplaySizeChanged         = 0x08
118     };
119 
120     uint32_t what;
121     sp<IBinder> token;
122     sp<IGraphicBufferProducer> surface;
123     uint32_t layerStack;
124     uint32_t orientation;
125     Rect viewport;
126     Rect frame;
127     uint32_t width, height;
128     status_t write(Parcel& output) const;
129     status_t read(const Parcel& input);
130 };
131 
132 }; // namespace android
133 
134 #endif // ANDROID_SF_LAYER_STATE_H
135 
136