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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* Copyright (C) 2011 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.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.graphics.Paint.FontMetricsInt;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.Display;
import android.view.Surface;
import android.view.SurfaceSession;
import android.view.Surface.OutOfResourcesException;
/**
* Displays a watermark on top of the window manager's windows.
*/
class Watermark {
final Display mDisplay;
final String[] mTokens;
final String mText;
final Paint mTextPaint;
final int mTextWidth;
final int mTextHeight;
final int mTextAscent;
final int mTextDescent;
final int mDeltaX;
final int mDeltaY;
Surface mSurface;
int mLastDW;
int mLastDH;
boolean mDrawNeeded;
Watermark(Display display, DisplayMetrics dm, SurfaceSession session, String[] tokens) {
if (false) {
Log.i(WindowManagerService.TAG, "*********************** WATERMARK");
for (int i=0; i<tokens.length; i++) {
Log.i(WindowManagerService.TAG, " TOKEN #" + i + ": " + tokens[i]);
}
}
mDisplay = display;
mTokens = tokens;
StringBuilder builder = new StringBuilder(32);
int len = mTokens[0].length();
len = len & ~1;
for (int i=0; i<len; i+=2) {
int c1 = mTokens[0].charAt(i);
int c2 = mTokens[0].charAt(i+1);
if (c1 >= 'a' && c1 <= 'f') c1 = c1 - 'a' + 10;
else if (c1 >= 'A' && c1 <= 'F') c1 = c1 - 'A' + 10;
else c1 -= '0';
if (c2 >= 'a' && c2 <= 'f') c2 = c2 - 'a' + 10;
else if (c2 >= 'A' && c2 <= 'F') c2 = c2 - 'A' + 10;
else c2 -= '0';
builder.append((char)(255-((c1*16)+c2)));
}
mText = builder.toString();
if (false) {
Log.i(WindowManagerService.TAG, "Final text: " + mText);
}
int fontSize = WindowManagerService.getPropertyInt(tokens, 1,
TypedValue.COMPLEX_UNIT_DIP, 20, dm);
mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextPaint.setTextSize(fontSize);
mTextPaint.setTypeface(Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD));
FontMetricsInt fm = mTextPaint.getFontMetricsInt();
mTextWidth = (int)mTextPaint.measureText(mText);
mTextAscent = fm.ascent;
mTextDescent = fm.descent;
mTextHeight = fm.descent - fm.ascent;
mDeltaX = WindowManagerService.getPropertyInt(tokens, 2,
TypedValue.COMPLEX_UNIT_PX, mTextWidth*2, dm);
mDeltaY = WindowManagerService.getPropertyInt(tokens, 3,
TypedValue.COMPLEX_UNIT_PX, mTextHeight*3, dm);
int shadowColor = WindowManagerService.getPropertyInt(tokens, 4,
TypedValue.COMPLEX_UNIT_PX, 0xb0000000, dm);
int color = WindowManagerService.getPropertyInt(tokens, 5,
TypedValue.COMPLEX_UNIT_PX, 0x60ffffff, dm);
int shadowRadius = WindowManagerService.getPropertyInt(tokens, 6,
TypedValue.COMPLEX_UNIT_PX, 7, dm);
int shadowDx = WindowManagerService.getPropertyInt(tokens, 8,
TypedValue.COMPLEX_UNIT_PX, 0, dm);
int shadowDy = WindowManagerService.getPropertyInt(tokens, 9,
TypedValue.COMPLEX_UNIT_PX, 0, dm);
mTextPaint.setColor(color);
mTextPaint.setShadowLayer(shadowRadius, shadowDx, shadowDy, shadowColor);
try {
mSurface = new Surface(session, 0,
"WatermarkSurface", mDisplay.getLayerStack(),
1, 1, PixelFormat.TRANSLUCENT, 0);
mSurface.setLayer(WindowManagerService.TYPE_LAYER_MULTIPLIER*100);
mSurface.setPosition(0, 0);
mSurface.show();
} catch (OutOfResourcesException e) {
}
}
void positionSurface(int dw, int dh) {
if (mLastDW != dw || mLastDH != dh) {
mLastDW = dw;
mLastDH = dh;
mSurface.setSize(dw, dh);
mDrawNeeded = true;
}
}
void drawIfNeeded() {
if (mDrawNeeded) {
final int dw = mLastDW;
final int dh = mLastDH;
mDrawNeeded = false;
Rect dirty = new Rect(0, 0, dw, dh);
Canvas c = null;
try {
c = mSurface.lockCanvas(dirty);
} catch (IllegalArgumentException e) {
} catch (OutOfResourcesException e) {
}
if (c != null) {
c.drawColor(0, PorterDuff.Mode.CLEAR);
int deltaX = mDeltaX;
int deltaY = mDeltaY;
// deltaX shouldn't be close to a round fraction of our
// x step, or else things will line up too much.
int div = (dw+mTextWidth)/deltaX;
int rem = (dw+mTextWidth) - (div*deltaX);
int qdelta = deltaX/4;
if (rem < qdelta || rem > (deltaX-qdelta)) {
deltaX += deltaX/3;
}
int y = -mTextHeight;
int x = -mTextWidth;
while (y < (dh+mTextHeight)) {
c.drawText(mText, x, y, mTextPaint);
x += deltaX;
if (x >= dw) {
x -= (dw+mTextWidth);
y += deltaY;
}
}
mSurface.unlockCanvasAndPost(c);
}
}
}
}
|
