1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.wm;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.view.Display;
import android.view.Surface;
import android.view.Surface.OutOfResourcesException;
import android.view.SurfaceControl;
import android.view.SurfaceSession;
import android.util.Slog;
class CircularDisplayMask {
private static final String TAG = "CircularDisplayMask";
// size of the chin
private int mScreenOffset = 0;
// Display dimensions
private Point mScreenSize;
private final SurfaceControl mSurfaceControl;
private final Surface mSurface = new Surface();
private int mLastDW;
private int mLastDH;
private boolean mDrawNeeded;
private Paint mPaint;
private int mRotation;
private boolean mVisible;
private boolean mDimensionsUnequal = false;
private int mMaskThickness;
public CircularDisplayMask(Display display, SurfaceSession session, int zOrder,
int screenOffset, int maskThickness) {
mScreenSize = new Point();
display.getSize(mScreenSize);
if (mScreenSize.x != mScreenSize.y) {
Slog.w(TAG, "Screen dimensions of displayId = " + display.getDisplayId() +
"are not equal, circularMask will not be drawn.");
mDimensionsUnequal = true;
}
SurfaceControl ctrl = null;
try {
if (WindowManagerService.DEBUG_SURFACE_TRACE) {
ctrl = new WindowStateAnimator.SurfaceTrace(session, "CircularDisplayMask",
mScreenSize.x, mScreenSize.y, PixelFormat.TRANSLUCENT,
SurfaceControl.HIDDEN);
} else {
ctrl = new SurfaceControl(session, "CircularDisplayMask", mScreenSize.x,
mScreenSize.y, PixelFormat.TRANSLUCENT, SurfaceControl.HIDDEN);
}
ctrl.setLayerStack(display.getLayerStack());
ctrl.setLayer(zOrder);
ctrl.setPosition(0, 0);
ctrl.show();
mSurface.copyFrom(ctrl);
} catch (OutOfResourcesException e) {
}
mSurfaceControl = ctrl;
mDrawNeeded = true;
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
mScreenOffset = screenOffset;
mMaskThickness = maskThickness;
}
private void drawIfNeeded() {
if (!mDrawNeeded || !mVisible || mDimensionsUnequal) {
return;
}
mDrawNeeded = false;
Rect dirty = new Rect(0, 0, mScreenSize.x, mScreenSize.y);
Canvas c = null;
try {
c = mSurface.lockCanvas(dirty);
} catch (IllegalArgumentException e) {
} catch (Surface.OutOfResourcesException e) {
}
if (c == null) {
return;
}
switch (mRotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_90:
// chin bottom or right
mSurfaceControl.setPosition(0, 0);
break;
case Surface.ROTATION_180:
// chin top
mSurfaceControl.setPosition(0, -mScreenOffset);
break;
case Surface.ROTATION_270:
// chin left
mSurfaceControl.setPosition(-mScreenOffset, 0);
break;
}
int circleRadius = mScreenSize.x / 2;
c.drawColor(Color.BLACK);
// The radius is reduced by mMaskThickness to provide an anti aliasing effect on the display edges.
c.drawCircle(circleRadius, circleRadius, circleRadius - mMaskThickness, mPaint);
mSurface.unlockCanvasAndPost(c);
}
// Note: caller responsible for being inside
// Surface.openTransaction() / closeTransaction()
public void setVisibility(boolean on) {
if (mSurfaceControl == null) {
return;
}
mVisible = on;
drawIfNeeded();
if (on) {
mSurfaceControl.show();
} else {
mSurfaceControl.hide();
}
}
void positionSurface(int dw, int dh, int rotation) {
if (mLastDW == dw && mLastDH == dh && mRotation == rotation) {
return;
}
mLastDW = dw;
mLastDH = dh;
mDrawNeeded = true;
mRotation = rotation;
drawIfNeeded();
}
}
|
