19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.graphics; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The NinePatch class permits drawing a bitmap in nine sections. 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The four corners are unscaled; the four edges are scaled in one axis, 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and the middle is scaled in both axes. Normally, the middle is 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * transparent so that the patch can provide a selection about a rectangle. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Essentially, it allows the creation of custom graphics that will scale the 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * way that you define, when content added within the image exceeds the normal 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds of the graphic. For a thorough explanation of a NinePatch image, 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * read the discussion in the 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <a href="{@docRoot}guide/topics/graphics/2d-graphics.html#nine-patch">2D 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Graphics</a> document. 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The <a href="{@docRoot}guide/developing/tools/draw9patch.html">Draw 9-Patch</a> 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * tool offers an extremely handy way to create your NinePatch images, 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using a WYSIWYG graphics editor. 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class NinePatch { 38deba785f122a47915756ffd991f5540d952cf937Romain Guy private final Bitmap mBitmap; 39deba785f122a47915756ffd991f5540d952cf937Romain Guy private final byte[] mChunk; 40deba785f122a47915756ffd991f5540d952cf937Romain Guy private Paint mPaint; 41deba785f122a47915756ffd991f5540d952cf937Romain Guy private String mSrcName; // Useful for debugging 42deba785f122a47915756ffd991f5540d952cf937Romain Guy private final RectF mRect = new RectF(); 43deba785f122a47915756ffd991f5540d952cf937Romain Guy 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create a drawable projection from a bitmap to nine patches. 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bitmap The bitmap describing the patches. 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param chunk The 9-patch data chunk describing how the underlying 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bitmap is split apart and drawn. 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param srcName The name of the source for the bitmap. Might be null. 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public NinePatch(Bitmap bitmap, byte[] chunk, String srcName) { 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBitmap = bitmap; 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChunk = chunk; 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSrcName = srcName; 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project validateNinePatchChunk(mBitmap.ni(), chunk); 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public NinePatch(NinePatch patch) { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBitmap = patch.mBitmap; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChunk = patch.mChunk; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSrcName = patch.mSrcName; 6654285f2cbfb6e307d594ca264f7230b4e1e3cdcePhil Dubach if (patch.mPaint != null) { 6754285f2cbfb6e307d594ca264f7230b4e1e3cdcePhil Dubach mPaint = new Paint(patch.mPaint); 6854285f2cbfb6e307d594ca264f7230b4e1e3cdcePhil Dubach } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project validateNinePatchChunk(mBitmap.ni(), mChunk); 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setPaint(Paint p) { 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaint = p; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Draw a bitmap of nine patches. 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas A container for the current matrix and clip used to draw the bitmap. 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param location Where to draw the bitmap. 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas canvas, RectF location) { 83deba785f122a47915756ffd991f5540d952cf937Romain Guy if (!canvas.isHardwareAccelerated()) { 84deba785f122a47915756ffd991f5540d952cf937Romain Guy nativeDraw(canvas.mNativeCanvas, location, 85deba785f122a47915756ffd991f5540d952cf937Romain Guy mBitmap.ni(), mChunk, 86deba785f122a47915756ffd991f5540d952cf937Romain Guy mPaint != null ? mPaint.mNativePaint : 0, 87deba785f122a47915756ffd991f5540d952cf937Romain Guy canvas.mDensity, mBitmap.mDensity); 88deba785f122a47915756ffd991f5540d952cf937Romain Guy } else { 894bb942083a0d4db746adf95349108dd8ef842e32Romain Guy canvas.drawPatch(mBitmap, mChunk, location, mPaint); 90deba785f122a47915756ffd991f5540d952cf937Romain Guy } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Draw a bitmap of nine patches. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas A container for the current matrix and clip used to draw the bitmap. 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param location Where to draw the bitmap. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas canvas, Rect location) { 100deba785f122a47915756ffd991f5540d952cf937Romain Guy if (!canvas.isHardwareAccelerated()) { 101deba785f122a47915756ffd991f5540d952cf937Romain Guy nativeDraw(canvas.mNativeCanvas, location, 102deba785f122a47915756ffd991f5540d952cf937Romain Guy mBitmap.ni(), mChunk, 103deba785f122a47915756ffd991f5540d952cf937Romain Guy mPaint != null ? mPaint.mNativePaint : 0, 104deba785f122a47915756ffd991f5540d952cf937Romain Guy canvas.mDensity, mBitmap.mDensity); 105deba785f122a47915756ffd991f5540d952cf937Romain Guy } else { 106deba785f122a47915756ffd991f5540d952cf937Romain Guy mRect.set(location); 1074bb942083a0d4db746adf95349108dd8ef842e32Romain Guy canvas.drawPatch(mBitmap, mChunk, mRect, mPaint); 108deba785f122a47915756ffd991f5540d952cf937Romain Guy } 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Draw a bitmap of nine patches. 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas A container for the current matrix and clip used to draw the bitmap. 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param location Where to draw the bitmap. 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param paint The Paint to draw through. 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas canvas, Rect location, Paint paint) { 119deba785f122a47915756ffd991f5540d952cf937Romain Guy if (!canvas.isHardwareAccelerated()) { 120deba785f122a47915756ffd991f5540d952cf937Romain Guy nativeDraw(canvas.mNativeCanvas, location, 121deba785f122a47915756ffd991f5540d952cf937Romain Guy mBitmap.ni(), mChunk, paint != null ? paint.mNativePaint : 0, 122deba785f122a47915756ffd991f5540d952cf937Romain Guy canvas.mDensity, mBitmap.mDensity); 123deba785f122a47915756ffd991f5540d952cf937Romain Guy } else { 124deba785f122a47915756ffd991f5540d952cf937Romain Guy mRect.set(location); 125deba785f122a47915756ffd991f5540d952cf937Romain Guy canvas.drawPatch(mBitmap, mChunk, mRect, paint); 126deba785f122a47915756ffd991f5540d952cf937Romain Guy } 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn /** 13011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Return the underlying bitmap's density, as per 13111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * {@link Bitmap#getDensity() Bitmap.getDensity()}. 13211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn */ 13311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getDensity() { 13411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return mBitmap.mDensity; 13511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn } 13611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getWidth() { 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBitmap.getWidth(); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getHeight() { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBitmap.getHeight(); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean hasAlpha() { 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBitmap.hasAlpha(); 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final Region getTransparentRegion(Rect location) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int r = nativeGetTransparentRegion(mBitmap.ni(), mChunk, location); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return r != 0 ? new Region(r) : null; 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public native static boolean isNinePatchChunk(byte[] chunk); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void validateNinePatchChunk(int bitmap, byte[] chunk); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeDraw(int canvas_instance, RectF loc, int bitmap_instance, 15811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn byte[] c, int paint_instance_or_null, 15911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn int destDensity, int srcDensity); 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeDraw(int canvas_instance, Rect loc, int bitmap_instance, 16111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn byte[] c, int paint_instance_or_null, 16211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn int destDensity, int srcDensity); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeGetTransparentRegion( 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bitmap, byte[] chunk, Rect location); 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 166