Bitmap.java revision 11ea33471e1a14a8594f0b2cd012d86340dd3bd8
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 Projectimport android.os.Parcel; 208cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chenimport android.os.Parcelable; 212784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackbornimport android.util.DisplayMetrics; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 238cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chenimport java.io.OutputStream; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.nio.Buffer; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.nio.ByteBuffer; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.nio.IntBuffer; 278cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chenimport java.nio.ShortBuffer; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic final class Bitmap implements Parcelable { 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates that the bitmap was created for an unknown pixel density. 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see Bitmap#getDensity() 3411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see Bitmap#setDensity(int) 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public static final int DENSITY_NONE = 0; 3711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Note: mNativeBitmap is used by FaceDetector_jni.cpp 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't change/rename without updating FaceDetector_jni.cpp 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final int mNativeBitmap; 418cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final boolean mIsMutable; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private byte[] mNinePatchChunk; // may be null 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mWidth = -1; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mHeight = -1; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mRecycled; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn // Package-scoped for fast access. 4911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn /*package*/ int mDensity = DENSITY_NONE; 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn private static volatile Matrix sScaleMatrix; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @noinspection UnusedDeclaration 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Private constructor that must received an already allocated native 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap int (pointer). 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project This can be called from JNI code. 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Bitmap(int nativeBitmap, boolean isMutable, byte[] ninePatchChunk) { 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nativeBitmap == 0) { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("internal error: native bitmap is 0"); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 658cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we delete this in our finalizer 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNativeBitmap = nativeBitmap; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsMutable = isMutable; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNinePatchChunk = ninePatchChunk; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * <p>Returns the density for this bitmap.</p> 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * <p>The default density scale is {@link #DENSITY_NONE}.</p> 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @return A scaling factor of the default density (160) or {@link #DENSITY_NONE} 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if the scaling factor is unknown. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see #setDensity(int) 81a53b828635fce8b6b2d3e3377d74d72070056623Dianne Hackborn * @see android.util.DisplayMetrics#DENSITY_DEFAULT 8211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see android.util.DisplayMetrics#densityDpi 8311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see #DENSITY_NONE 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getDensity() { 8611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return mDensity; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * <p>Specifies the density for this bitmap. When the bitmap is 9111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * drawn to a Canvas that also has a density, it will be scaled 9211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * appropriately.</p> 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @param density The density scaling factor to use with this bitmap or 9511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * {@link #DENSITY_NONE} if the density is unknown. 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see #getDensity() 98a53b828635fce8b6b2d3e3377d74d72070056623Dianne Hackborn * @see android.util.DisplayMetrics#DENSITY_DEFAULT 9911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see android.util.DisplayMetrics#densityDpi 10011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @see #DENSITY_NONE 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public void setDensity(int density) { 10311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn mDensity = density; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the nine patch chunk. 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param chunk The definition of the nine patch 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setNinePatchChunk(byte[] chunk) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNinePatchChunk = chunk; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1168cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Free up the memory associated with this bitmap's pixels, and mark the 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bitmap as "dead", meaning it will throw an exception if getPixels() or 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * setPixels() is called, and will draw nothing. This operation cannot be 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * reversed, so it should only be called if you are sure there are no 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * further uses for the bitmap. This is an advanced call, and normally need 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not be called, since the normal GC process will free up this memory when 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * there are no more references to this bitmap. 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void recycle() { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mRecycled) { 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeRecycle(mNativeBitmap); 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNinePatchChunk = null; 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycled = true; 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns true if this bitmap has been recycled. If so, then it is an error 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to try to access its pixels, and the bitmap will not draw. 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the bitmap has been recycled 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean isRecycled() { 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mRecycled; 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1438cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is called by methods that want to throw an exception if the bitmap 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * has already been recycled. 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void checkRecycled(String errorMessage) { 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mRecycled) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException(errorMessage); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1538cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Common code for checking that x and y are >= 0 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x x coordinate to ensure is >= 0 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y y coordinate to ensure is >= 0 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void checkXYSign(int x, int y) { 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x < 0) { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("x must be >= 0"); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (y < 0) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("y must be >= 0"); 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Common code for checking that width and height are > 0 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width width to ensure is > 0 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height height to ensure is > 0 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void checkWidthHeight(int width, int height) { 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (width <= 0) { 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("width must be > 0"); 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (height <= 0) { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("height must be > 0"); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public enum Config { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // these native values must match up with the enum in SkBitmap.h 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALPHA_8 (2), 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project RGB_565 (4), 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ARGB_4444 (5), 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ARGB_8888 (6); 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Config(int ni) { 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.nativeInt = ni; 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int nativeInt; 1958cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ static Config nativeToConfig(int ni) { 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sConfigs[ni]; 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1998cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static Config sConfigs[] = { 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project null, null, ALPHA_8, null, RGB_565, ARGB_4444, ARGB_8888 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2048cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copy the bitmap's pixels into the specified buffer (allocated by the 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * caller). An exception is thrown if the buffer is not large enough to 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * hold all of the pixels (taking into account the number of bytes per 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixel) or if the Buffer subclass is not one of the support types 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (ByteBuffer, ShortBuffer, IntBuffer). 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void copyPixelsToBuffer(Buffer dst) { 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int elements = dst.remaining(); 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int shift; 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dst instanceof ByteBuffer) { 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 0; 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (dst instanceof ShortBuffer) { 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 1; 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (dst instanceof IntBuffer) { 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 2; 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("unsupported Buffer subclass"); 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2248cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long bufferSize = (long)elements << shift; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long pixelSize = (long)getRowBytes() * getHeight(); 2278cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bufferSize < pixelSize) { 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Buffer not large enough for pixels"); 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2318cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeCopyPixelsToBuffer(mNativeBitmap, dst); 2338cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // now update the buffer's position 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = dst.position(); 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position += pixelSize >> shift; 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dst.position(position); 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copy the pixels from the buffer, beginning at the current position, 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * overwriting the bitmap's pixels. The data in the buffer is not changed 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * in any way (unlike setPixels(), which converts from unpremultipled 32bit 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to whatever the bitmap's native format is. 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void copyPixelsFromBuffer(Buffer src) { 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("copyPixelsFromBuffer called on recycled bitmap"); 2488cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int elements = src.remaining(); 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int shift; 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (src instanceof ByteBuffer) { 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 0; 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (src instanceof ShortBuffer) { 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 1; 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (src instanceof IntBuffer) { 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shift = 2; 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("unsupported Buffer subclass"); 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2608cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long bufferBytes = (long)elements << shift; 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long bitmapBytes = (long)getRowBytes() * getHeight(); 2638cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bufferBytes < bitmapBytes) { 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Buffer not large enough for pixels"); 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2678cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeCopyPixelsFromBuffer(mNativeBitmap, src); 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2708cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Tries to make a new bitmap based on the dimensions of this bitmap, 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * setting the new bitmap's config to the one specified, and then copying 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this bitmap's pixels into the new bitmap. If the conversion is not 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * supported, or the allocator fails, then this returns NULL. 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param config The desired config for the resulting bitmap 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isMutable True if the resulting bitmap should be mutable (i.e. 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * its pixels can be modified) 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the new bitmap, or null if the copy could not be made. 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap copy(Config config, boolean isMutable) { 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't copy a recycled bitmap"); 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeCopy(mNativeBitmap, config.nativeInt, isMutable); 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createScaledBitmap(Bitmap src, int dstWidth, 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int dstHeight, boolean filter) { 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Matrix m; 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (Bitmap.class) { 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // small pool of just 1 matrix 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m = sScaleMatrix; 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sScaleMatrix = null; 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (m == null) { 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m = new Matrix(); 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2998cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int width = src.getWidth(); 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int height = src.getHeight(); 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final float sx = dstWidth / (float)width; 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final float sy = dstHeight / (float)height; 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m.setScale(sx, sy); 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap b = Bitmap.createBitmap(src, 0, 0, width, height, m, filter); 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (Bitmap.class) { 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // do we need to check for null? why not just assign everytime? 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sScaleMatrix == null) { 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sScaleMatrix = m; 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3148cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen return b; 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3168cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an immutable bitmap from the source bitmap. The new bitmap may 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be the same object as source, or a copy may have been made. 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(Bitmap src) { 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return createBitmap(src, 0, 0, src.getWidth(), src.getHeight()); 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an immutable bitmap from the specified subset of the source 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bitmap. The new bitmap may be the same object as source, or a copy may 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * have been made. 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param source The bitmap we are subsetting 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate of the first pixel in source 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate of the first pixel in source 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The number of pixels in each row 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The number of rows 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height) { 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return createBitmap(source, x, y, width, height, null, false); 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3398cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an immutable bitmap from subset of the source bitmap, 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * transformed by the optional matrix. 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param source The bitmap we are subsetting 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate of the first pixel in source 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate of the first pixel in source 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The number of pixels in each row 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The number of rows 34960b88edea7132ddce90f2dced07c6706f1502270Ken Shirriff * @param m Optional matrix to be applied to the pixels 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param filter true if the source should be filtered. 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Only applies if the matrix contains more than just 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * translation. 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A bitmap that represents the specified subset of source 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the x, y, width, height values are 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * outside of the dimensions of the source bitmap. 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height, 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Matrix m, boolean filter) { 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkXYSign(x, y); 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkWidthHeight(width, height); 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x + width > source.getWidth()) { 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("x + width must be <= bitmap.width()"); 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (y + height > source.getHeight()) { 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("y + height must be <= bitmap.height()"); 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // check if we can just return our argument unchanged 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!source.isMutable() && x == 0 && y == 0 && width == source.getWidth() && 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project height == source.getHeight() && (m == null || m.isIdentity())) { 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return source; 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3748cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int neww = width; 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newh = height; 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Canvas canvas = new Canvas(); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap bitmap; 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Paint paint; 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect srcR = new Rect(x, y, x + width, y + height); 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project RectF dstR = new RectF(0, 0, width, height); 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (m == null || m.isIdentity()) { 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap = createBitmap(neww, newh, 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project source.hasAlpha() ? Config.ARGB_8888 : Config.RGB_565); 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint = null; // not needed 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* the dst should have alpha if the src does, or if our matrix 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doesn't preserve rectness 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean hasAlpha = source.hasAlpha() || !m.rectStaysRect(); 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project RectF deviceR = new RectF(); 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m.mapRect(deviceR, dstR); 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project neww = Math.round(deviceR.width()); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newh = Math.round(deviceR.height()); 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap = createBitmap(neww, newh, hasAlpha ? Config.ARGB_8888 : Config.RGB_565); 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (hasAlpha) { 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap.eraseColor(0); 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.translate(-deviceR.left, -deviceR.top); 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.concat(m); 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint = new Paint(); 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint.setFilterBitmap(filter); 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!m.rectStaysRect()) { 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint.setAntiAlias(true); 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.setBitmap(bitmap); 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.drawBitmap(source, srcR, dstR, paint); 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The new bitmap was created from a known bitmap source so assume that 41311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn // they use the same density 41411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn bitmap.mDensity = source.mDensity; 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bitmap; 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4188cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a mutable bitmap with the specified width and height. 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The width of the bitmap 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The height of the bitmap 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param config The bitmap config to create. 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the width or height are <= 0 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(int width, int height, Config config) { 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap bm = nativeCreate(null, 0, width, width, height, config.nativeInt, true); 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bm.eraseColor(0); // start with black/transparent pixels 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bm; 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4328cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a immutable bitmap with the specified width and height, with each 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixel value set to the corresponding value in the colors array. 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param colors Array of {@link Color} used to initialize the pixels. 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset Number of values to skip before the first color in the 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of colors. 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param stride Number of colors in the array between rows (must be >= 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * width or <= -width). 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The width of the bitmap 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The height of the bitmap 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param config The bitmap config to create. If the config does not 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * support per-pixel alpha (e.g. RGB_565), then the alpha 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bytes in the colors[] will be ignored (assumed to be FF) 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the width or height are <= 0, or if 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the color array's length is less than the number of pixels. 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(int colors[], int offset, int stride, 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width, int height, Config config) { 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkWidthHeight(width, height); 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Math.abs(stride) < width) { 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("abs(stride) must be >= width"); 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastScanline = offset + (height - 1) * stride; 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = colors.length; 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (offset < 0 || (offset + width > length) || lastScanline < 0 || 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (lastScanline + width > length)) { 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new ArrayIndexOutOfBoundsException(); 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeCreate(colors, offset, stride, width, height, 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project config.nativeInt, false); 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a immutable bitmap with the specified width and height, with each 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixel value set to the corresponding value in the colors array. 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param colors Array of {@link Color} used to initialize the pixels. 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This array must be at least as large as width * height. 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The width of the bitmap 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The height of the bitmap 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param config The bitmap config to create. If the config does not 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * support per-pixel alpha (e.g. RGB_565), then the alpha 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bytes in the colors[] will be ignored (assumed to be FF) 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the width or height are <= 0, or if 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the color array's length is less than the number of pixels. 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Bitmap createBitmap(int colors[], int width, int height, Config config) { 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return createBitmap(colors, 0, width, width, height, config); 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an optional array of private data, used by the UI system for 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * some bitmaps. Not intended to be called by applications. 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public byte[] getNinePatchChunk() { 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mNinePatchChunk; 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Specifies the known formats a bitmap can be compressed into 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public enum CompressFormat { 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project JPEG (0), 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PNG (1); 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CompressFormat(int nativeInt) { 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.nativeInt = nativeInt; 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int nativeInt; 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Number of bytes of temp storage we use for communicating between the 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * native compressor and the java OutputStream. 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int WORKING_COMPRESS_STORAGE = 4096; 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Write a compressed version of the bitmap to the specified outputstream. 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If this returns true, the bitmap can be reconstructed by passing a 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * corresponding inputstream to BitmapFactory.decodeStream(). Note: not 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * all Formats support all bitmap configs directly, so it is possible that 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the returned bitmap from BitmapFactory could be in a different bitdepth, 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and/or may have lost per-pixel alpha (e.g. JPEG only supports opaque 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels). 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param format The format of the compressed image 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param quality Hint to the compressor, 0-100. 0 meaning compress for 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * small size, 100 meaning compress for max quality. Some 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * formats, like PNG which is lossless, will ignore the 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * quality setting 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param stream The outputstream to write the compressed data. 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if successfully compressed to the specified stream. 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean compress(CompressFormat format, int quality, OutputStream stream) { 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't compress a recycled bitmap"); 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // do explicit check before calling the native method 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (stream == null) { 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new NullPointerException(); 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (quality < 0 || quality > 100) { 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("quality must be 0..100"); 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeCompress(mNativeBitmap, format.nativeInt, quality, 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project stream, new byte[WORKING_COMPRESS_STORAGE]); 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5418cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns true if the bitmap is marked as mutable (i.e. can be drawn into) 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean isMutable() { 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsMutable; 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** Returns the bitmap's width */ 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final int getWidth() { 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWidth == -1 ? mWidth = nativeWidth(mNativeBitmap) : mWidth; 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** Returns the bitmap's height */ 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final int getHeight() { 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHeight == -1 ? mHeight = nativeHeight(mNativeBitmap) : mHeight; 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5588cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 56011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Convenience for calling {@link #getScaledWidth(int)} with the target 56111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * density of the given {@link Canvas}. 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5632784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn public int getScaledWidth(Canvas canvas) { 56411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getWidth(), mDensity, canvas.mDensity); 5652784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn } 5662784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn 5672784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn /** 56811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Convenience for calling {@link #getScaledHeight(int)} with the target 56911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * density of the given {@link Canvas}. 5702784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn */ 5712784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn public int getScaledHeight(Canvas canvas) { 57211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getHeight(), mDensity, canvas.mDensity); 57311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn } 57411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 57511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn /** 57611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Convenience for calling {@link #getScaledWidth(int)} with the target 57711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * density of the given {@link DisplayMetrics}. 57811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn */ 57911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getScaledWidth(DisplayMetrics metrics) { 58011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getWidth(), mDensity, metrics.densityDpi); 58111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn } 58211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 58311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn /** 58411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * Convenience for calling {@link #getScaledHeight(int)} with the target 58511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * density of the given {@link DisplayMetrics}. 58611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn */ 58711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getScaledHeight(DisplayMetrics metrics) { 58811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getHeight(), mDensity, metrics.densityDpi); 5892784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn } 5902784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn 5912784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn /** 5922784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn * Convenience method that returns the width of this bitmap divided 5932784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn * by the density scale factor. 5942784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn * 59511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @param targetDensity The density of the target canvas of the bitmap. 5962784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn * @return The scaled width of this bitmap, according to the density scale factor. 5972784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn */ 59811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getScaledWidth(int targetDensity) { 59911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getWidth(), mDensity, targetDensity); 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Convenience method that returns the height of this bitmap divided 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by the density scale factor. 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 60611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @param targetDensity The density of the target canvas of the bitmap. 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scaled height of this bitmap, according to the density scale factor. 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 60911ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn public int getScaledHeight(int targetDensity) { 61011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return scaleFromDensity(getHeight(), mDensity, targetDensity); 61111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn } 61211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 61311ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn /** 61411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn * @hide 61511ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn */ 61611ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn static public int scaleFromDensity(int size, int sdensity, int tdensity) { 61711ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn if (sdensity == DENSITY_NONE || sdensity == tdensity) { 61811ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return size; 6192784ff0af88128f66ae690b73d48fb7e4a211e68Dianne Hackborn } 62011ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 62111ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn // Scale by tdensity / sdensity, rounding up. 62211ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn return ( (size * tdensity) + (sdensity >> 1) ) / sdensity; 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 62411ea33471e1a14a8594f0b2cd012d86340dd3bd8Dianne Hackborn 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return the number of bytes between rows in the bitmap's pixels. Note that 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this refers to the pixels as stored natively by the bitmap. If you call 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * getPixels() or setPixels(), then the pixels are uniformly treated as 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32bit values, packed according to the Color class. 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return number of bytes between rows of the native bitmap pixels. 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final int getRowBytes() { 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeRowBytes(mNativeBitmap); 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6368cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If the bitmap's internal config is in one of the public formats, return 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * that config, otherwise return null. 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final Config getConfig() { 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Config.nativeToConfig(nativeConfig(mNativeBitmap)); 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** Returns true if the bitmap's pixels support levels of alpha */ 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean hasAlpha() { 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeHasAlpha(mNativeBitmap); 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the bitmap's pixels with the specified {@link Color}. 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException if the bitmap is not mutable. 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void eraseColor(int c) { 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't erase a recycled bitmap"); 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isMutable()) { 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("cannot erase immutable bitmaps"); 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeErase(mNativeBitmap, c); 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the {@link Color} at the specified location. Throws an exception 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if x or y are out of bounds (negative or >= to the width or height 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * respectively). 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate (0...width-1) of the pixel to return 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate (0...height-1) of the pixel to return 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The argb {@link Color} at the specified coordinate 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if x, y exceed the bitmap's bounds 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getPixel(int x, int y) { 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't call getPixel() on a recycled bitmap"); 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPixelAccess(x, y); 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeGetPixel(mNativeBitmap, x, y); 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6788cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns in pixels[] a copy of the data in the bitmap. Each value is 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a packed int representing a {@link Color}. The stride parameter allows 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the caller to allow for gaps in the returned pixels array between 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * rows. For normal packed results, just pass width for the stride value. 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pixels The array to receive the bitmap's colors 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset The first index to write into pixels[] 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param stride The number of entries in pixels[] to skip between 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * rows (must be >= bitmap's width). Can be negative. 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate of the first pixel to read from 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate of the first pixel to read from 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The number of pixels to read from each row 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The number of rows to read 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if x, y, width, height exceed the 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds of the bitmap, or if abs(stride) < width. 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws ArrayIndexOutOfBoundsException if the pixels array is too small 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to receive the specified number of pixels. 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void getPixels(int[] pixels, int offset, int stride, 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x, int y, int width, int height) { 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't call getPixels() on a recycled bitmap"); 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (width == 0 || height == 0) { 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; // nothing to do 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPixelsAccess(x, y, width, height, offset, stride, pixels); 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeGetPixels(mNativeBitmap, pixels, offset, stride, 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x, y, width, height); 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7108cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shared code to check for illegal arguments passed to getPixel() 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or setPixel() 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x x coordinate of the pixel 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y y coordinate of the pixel 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void checkPixelAccess(int x, int y) { 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkXYSign(x, y); 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x >= getWidth()) { 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("x must be < bitmap.width()"); 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (y >= getHeight()) { 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("y must be < bitmap.height()"); 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shared code to check for illegal arguments passed to getPixels() 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or setPixels() 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x left edge of the area of pixels to access 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y top edge of the area of pixels to access 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width width of the area of pixels to access 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height height of the area of pixels to access 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset offset into pixels[] array 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param stride number of elements in pixels[] between each logical row 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pixels array to hold the area of pixels being accessed 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void checkPixelsAccess(int x, int y, int width, int height, 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset, int stride, int pixels[]) { 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkXYSign(x, y); 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (width < 0) { 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("width must be >= 0"); 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (height < 0) { 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("height must be >= 0"); 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x + width > getWidth()) { 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException( 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "x + width must be <= bitmap.width()"); 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (y + height > getHeight()) { 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException( 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "y + height must be <= bitmap.height()"); 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Math.abs(stride) < width) { 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("abs(stride) must be >= width"); 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastScanline = offset + (height - 1) * stride; 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = pixels.length; 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (offset < 0 || (offset + width > length) 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || lastScanline < 0 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (lastScanline + width > length)) { 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new ArrayIndexOutOfBoundsException(); 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7678cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Write the specified {@link Color} into the bitmap (assuming it is 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mutable) at the x,y coordinate. 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate of the pixel to replace (0...width-1) 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate of the pixel to replace (0...height-1) 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param color The {@link Color} to write into the bitmap 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException if the bitmap is not mutable 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if x, y are outside of the bitmap's 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds. 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setPixel(int x, int y, int color) { 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't call setPixel() on a recycled bitmap"); 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isMutable()) { 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException(); 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPixelAccess(x, y); 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeSetPixel(mNativeBitmap, x, y, color); 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7878cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Replace pixels in the bitmap with the colors in the array. Each element 7908cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * in the array is a packed int prepresenting a {@link Color} 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pixels The colors to write to the bitmap 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset The index of the first color to read from pixels[] 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param stride The number of colors in pixels[] to skip between rows. 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Normally this value will be the same as the width of 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap, but it can be larger (or negative). 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x The x coordinate of the first pixel to write to in 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap. 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y coordinate of the first pixel to write to in 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap. 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param width The number of colors to copy from pixels[] per row 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The number of rows to write to the bitmap 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException if the bitmap is not mutable 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if x, y, width, height are outside of 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the bitmap's bounds. 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws ArrayIndexOutOfBoundsException if the pixels array is too small 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to receive the specified number of pixels. 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setPixels(int[] pixels, int offset, int stride, 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x, int y, int width, int height) { 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't call setPixels() on a recycled bitmap"); 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isMutable()) { 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException(); 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (width == 0 || height == 0) { 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; // nothing to do 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPixelsAccess(x, y, width, height, offset, stride, pixels); 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeSetPixels(mNativeBitmap, pixels, offset, stride, 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x, y, width, height); 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8228cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final Parcelable.Creator<Bitmap> CREATOR 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project = new Parcelable.Creator<Bitmap>() { 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Rebuilds a bitmap previously stored with writeToParcel(). 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param p Parcel object to read the bitmap from 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return a new bitmap created from the data in the parcel 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap createFromParcel(Parcel p) { 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap bm = nativeCreateFromParcel(p); 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bm == null) { 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Failed to unparcel Bitmap"); 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bm; 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap[] newArray(int size) { 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new Bitmap[size]; 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * No special parcel contents. 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int describeContents() { 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Write the bitmap and its pixels to the parcel. The bitmap can be 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * rebuilt from the parcel by calling CREATOR.createFromParcel(). 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param p Parcel object to write the bitmap data into 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void writeToParcel(Parcel p, int flags) { 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't parcel a recycled bitmap"); 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!nativeWriteToParcel(mNativeBitmap, mIsMutable, p)) { 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("native writeToParcel failed"); 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a new bitmap that captures the alpha values of the original. 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This may be drawn with Canvas.drawBitmap(), where the color(s) will be 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * taken from the paint that is passed to the draw call. 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return new bitmap containing the alpha channel of the original bitmap. 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap extractAlpha() { 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return extractAlpha(null, null); 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8728cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a new bitmap that captures the alpha values of the original. 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * These values may be affected by the optional Paint parameter, which 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * can contain its own alpha, and may also contain a MaskFilter which 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * could change the actual dimensions of the resulting bitmap (e.g. 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a blur maskfilter might enlarge the resulting bitmap). If offsetXY 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is not null, it returns the amount to offset the returned bitmap so 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * that it will logically align with the original. For example, if the 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * paint contains a blur of radius 2, then offsetXY[] would contains 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * -2, -2, so that drawing the alpha bitmap offset by (-2, -2) and then 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawing the original would result in the blur visually aligning with 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the original. 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param paint Optional paint used to modify the alpha values in the 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * resulting bitmap. Pass null for default behavior. 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offsetXY Optional array that returns the X (index 0) and Y 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (index 1) offset needed to position the returned bitmap 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * so that it visually lines up with the original. 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return new bitmap containing the (optionally modified by paint) alpha 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * channel of the original bitmap. This may be drawn with 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Canvas.drawBitmap(), where the color(s) will be taken from the 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * paint that is passed to the draw call. 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap extractAlpha(Paint paint, int[] offsetXY) { 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkRecycled("Can't extractAlpha on a recycled bitmap"); 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nativePaint = paint != null ? paint.mNativePaint : 0; 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap bm = nativeExtractAlpha(mNativeBitmap, nativePaint, offsetXY); 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bm == null) { 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Failed to extractAlpha on Bitmap"); 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bm; 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9058cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen /** 9068cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * Rebuilds any caches associated with the bitmap that are used for 9078cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * drawing it. In the case of purgeable bitmaps, this call will attempt to 9088cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * ensure that the pixels have been decoded. 9098cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * If this is called on more than one bitmap in sequence, the priority is 9108cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * given in LRU order (i.e. the last bitmap called will be given highest 9118cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * priority). 9128cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * 9138cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * For bitmaps with no associated caches, this call is effectively a no-op, 9148cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen * and therefore is harmless. 9158cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen */ 9168cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen public void prepareToDraw() { 9178cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen nativePrepareToDraw(mNativeBitmap); 9188cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen } 9198cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 9208cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen @Override 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void finalize() throws Throwable { 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeDestructor(mNativeBitmap); 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.finalize(); 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9288cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //////////// native methods 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native Bitmap nativeCreate(int[] colors, int offset, 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int stride, int width, int height, 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nativeConfig, boolean mutable); 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native Bitmap nativeCopy(int srcBitmap, int nativeConfig, 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean isMutable); 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeDestructor(int nativeBitmap); 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeRecycle(int nativeBitmap); 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native boolean nativeCompress(int nativeBitmap, int format, 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int quality, OutputStream stream, 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] tempStorage); 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeErase(int nativeBitmap, int color); 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeWidth(int nativeBitmap); 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeHeight(int nativeBitmap); 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeRowBytes(int nativeBitmap); 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeConfig(int nativeBitmap); 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native boolean nativeHasAlpha(int nativeBitmap); 9488cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native int nativeGetPixel(int nativeBitmap, int x, int y); 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeGetPixels(int nativeBitmap, int[] pixels, 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset, int stride, int x, 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y, int width, int height); 9538cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeSetPixel(int nativeBitmap, int x, int y, 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int color); 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeSetPixels(int nativeBitmap, int[] colors, 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset, int stride, int x, 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y, int width, int height); 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeCopyPixelsToBuffer(int nativeBitmap, 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Buffer dst); 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void nativeCopyPixelsFromBuffer(int nb, Buffer src); 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native Bitmap nativeCreateFromParcel(Parcel p); 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // returns true on success 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native boolean nativeWriteToParcel(int nativeBitmap, 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean isMutable, 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Parcel p); 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // returns a new bitmap built from the native bitmap's alpha, and the paint 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native Bitmap nativeExtractAlpha(int nativeBitmap, 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nativePaint, 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int[] offsetXY); 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9738cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen private static native void nativePrepareToDraw(int nativeBitmap); 9748cdcb12752b716d0407733fecefcf1d9e926310aWei-Ta Chen 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ final int ni() { 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mNativeBitmap; 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 979