Watermark.java revision 64a55af0ac700baecb0877235eb42caac59a3560
16e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn/* 26e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * Copyright (C) 2011 The Android Open Source Project 36e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * 46e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * Licensed under the Apache License, Version 2.0 (the "License"); 56e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * you may not use this file except in compliance with the License. 66e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * You may obtain a copy of the License at 76e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * 86e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * http://www.apache.org/licenses/LICENSE-2.0 96e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * 106e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * Unless required by applicable law or agreed to in writing, software 116e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * distributed under the License is distributed on an "AS IS" BASIS, 126e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 136e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * See the License for the specific language governing permissions and 146e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * limitations under the License. 156e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn */ 166e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 176e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornpackage com.android.server.wm; 186e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 196e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.Canvas; 206e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.Paint; 216e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.PixelFormat; 226e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.PorterDuff; 236e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.Rect; 246e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.Typeface; 256e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.graphics.Paint.FontMetricsInt; 266e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.util.DisplayMetrics; 276e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.util.Log; 286e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.util.TypedValue; 296e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.view.Display; 306e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.view.Surface; 316e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.view.SurfaceSession; 326e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornimport android.view.Surface.OutOfResourcesException; 336e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 346e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn/** 356e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn * Displays a watermark on top of the window manager's windows. 366e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn */ 376e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackbornclass Watermark { 3898365d7663cbd82979a5700faf0050220b01084dJeff Brown final Display mDisplay; 396e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final String[] mTokens; 406e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final String mText; 416e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final Paint mTextPaint; 426e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mTextWidth; 436e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mTextHeight; 446e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mTextAscent; 456e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mTextDescent; 466e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mDeltaX; 476e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int mDeltaY; 486e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 496e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Surface mSurface; 506e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int mLastDW; 516e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int mLastDH; 526e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn boolean mDrawNeeded; 536e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 5498365d7663cbd82979a5700faf0050220b01084dJeff Brown Watermark(Display display, DisplayMetrics dm, SurfaceSession session, String[] tokens) { 556e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (false) { 566e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Log.i(WindowManagerService.TAG, "*********************** WATERMARK"); 576e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn for (int i=0; i<tokens.length; i++) { 586e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Log.i(WindowManagerService.TAG, " TOKEN #" + i + ": " + tokens[i]); 596e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 606e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 616e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 6298365d7663cbd82979a5700faf0050220b01084dJeff Brown mDisplay = display; 636e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTokens = tokens; 646e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 656e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn StringBuilder builder = new StringBuilder(32); 666e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int len = mTokens[0].length(); 676e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn len = len & ~1; 686e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn for (int i=0; i<len; i+=2) { 696e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int c1 = mTokens[0].charAt(i); 706e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int c2 = mTokens[0].charAt(i+1); 716e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (c1 >= 'a' && c1 <= 'f') c1 = c1 - 'a' + 10; 726e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn else if (c1 >= 'A' && c1 <= 'F') c1 = c1 - 'A' + 10; 736e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn else c1 -= '0'; 746e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (c2 >= 'a' && c2 <= 'f') c2 = c2 - 'a' + 10; 756e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn else if (c2 >= 'A' && c2 <= 'F') c2 = c2 - 'A' + 10; 766e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn else c2 -= '0'; 776e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn builder.append((char)(255-((c1*16)+c2))); 786e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 796e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mText = builder.toString(); 806e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (false) { 816e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Log.i(WindowManagerService.TAG, "Final text: " + mText); 826e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 836e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 846e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int fontSize = WindowManagerService.getPropertyInt(tokens, 1, 856e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_DIP, 20, dm); 866e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 876e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 886e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextPaint.setTextSize(fontSize); 896e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextPaint.setTypeface(Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD)); 906e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 916e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn FontMetricsInt fm = mTextPaint.getFontMetricsInt(); 926e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextWidth = (int)mTextPaint.measureText(mText); 936e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextAscent = fm.ascent; 946e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextDescent = fm.descent; 956e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextHeight = fm.descent - fm.ascent; 966e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 976e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mDeltaX = WindowManagerService.getPropertyInt(tokens, 2, 986e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, mTextWidth*2, dm); 996e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mDeltaY = WindowManagerService.getPropertyInt(tokens, 3, 1006e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, mTextHeight*3, dm); 1016e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int shadowColor = WindowManagerService.getPropertyInt(tokens, 4, 1026e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, 0xb0000000, dm); 1036e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int color = WindowManagerService.getPropertyInt(tokens, 5, 1046e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, 0x60ffffff, dm); 1056e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int shadowRadius = WindowManagerService.getPropertyInt(tokens, 6, 1066e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, 7, dm); 1076e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int shadowDx = WindowManagerService.getPropertyInt(tokens, 8, 1086e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, 0, dm); 1096e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int shadowDy = WindowManagerService.getPropertyInt(tokens, 9, 1106e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn TypedValue.COMPLEX_UNIT_PX, 0, dm); 1116e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1126e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextPaint.setColor(color); 1136e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mTextPaint.setShadowLayer(shadowRadius, shadowDx, shadowDy, shadowColor); 1146e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1156e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn try { 11664a55af0ac700baecb0877235eb42caac59a3560Jeff Brown mSurface = new Surface(session, "WatermarkSurface", 11764a55af0ac700baecb0877235eb42caac59a3560Jeff Brown 1, 1, PixelFormat.TRANSLUCENT, Surface.HIDDEN); 11864a55af0ac700baecb0877235eb42caac59a3560Jeff Brown mSurface.setLayerStack(mDisplay.getLayerStack()); 1196e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mSurface.setLayer(WindowManagerService.TYPE_LAYER_MULTIPLIER*100); 1206e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mSurface.setPosition(0, 0); 1216e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mSurface.show(); 1226e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } catch (OutOfResourcesException e) { 1236e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1246e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1256e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1266e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn void positionSurface(int dw, int dh) { 1276e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (mLastDW != dw || mLastDH != dh) { 1286e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mLastDW = dw; 1296e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mLastDH = dh; 1306e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mSurface.setSize(dw, dh); 1316e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mDrawNeeded = true; 1326e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1336e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1346e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1356e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn void drawIfNeeded() { 1366e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (mDrawNeeded) { 1376e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int dw = mLastDW; 1386e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn final int dh = mLastDH; 1396e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1406e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mDrawNeeded = false; 1416e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Rect dirty = new Rect(0, 0, dw, dh); 1426e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn Canvas c = null; 1436e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn try { 1446e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn c = mSurface.lockCanvas(dirty); 1456e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } catch (IllegalArgumentException e) { 1466e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } catch (OutOfResourcesException e) { 1476e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1486e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (c != null) { 1496e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn c.drawColor(0, PorterDuff.Mode.CLEAR); 1506e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1516e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int deltaX = mDeltaX; 1526e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int deltaY = mDeltaY; 1536e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1546e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn // deltaX shouldn't be close to a round fraction of our 1556e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn // x step, or else things will line up too much. 1566e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int div = (dw+mTextWidth)/deltaX; 1576e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int rem = (dw+mTextWidth) - (div*deltaX); 1586e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int qdelta = deltaX/4; 1596e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (rem < qdelta || rem > (deltaX-qdelta)) { 1606e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn deltaX += deltaX/3; 1616e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1626e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn 1636e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int y = -mTextHeight; 1646e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn int x = -mTextWidth; 1656e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn while (y < (dh+mTextHeight)) { 1666e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn c.drawText(mText, x, y, mTextPaint); 1676e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn x += deltaX; 1686e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn if (x >= dw) { 1696e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn x -= (dw+mTextWidth); 1706e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn y += deltaY; 1716e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1726e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1736e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn mSurface.unlockCanvasAndPost(c); 1746e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1756e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 1766e1eb76f02ccc9dbc309b938f62d39312da8cafeDianne Hackborn } 17764a55af0ac700baecb0877235eb42caac59a3560Jeff Brown} 178