| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.graphics; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.io.OutputStream; |
| import java.nio.Buffer; |
| import java.nio.ByteBuffer; |
| import java.nio.ShortBuffer; |
| import java.nio.IntBuffer; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| public final class Bitmap implements Parcelable { |
| |
| // Note: mNativeBitmap is used by FaceDetector_jni.cpp |
| // Don't change/rename without updating FaceDetector_jni.cpp |
| private final int mNativeBitmap; |
| |
| private final boolean mIsMutable; |
| private byte[] mNinePatchChunk; // may be null |
| private int mWidth = -1; |
| private int mHeight = -1; |
| private boolean mRecycled; |
| |
| private static volatile Matrix sScaleMatrix; |
| |
| /** |
| * @noinspection UnusedDeclaration |
| */ |
| /* Private constructor that must received an already allocated native |
| bitmap int (pointer). |
| |
| This can be called from JNI code. |
| */ |
| private Bitmap(int nativeBitmap, boolean isMutable, byte[] ninePatchChunk) { |
| if (nativeBitmap == 0) { |
| throw new RuntimeException("internal error: native bitmap is 0"); |
| } |
| |
| // we delete this in our finalizer |
| mNativeBitmap = nativeBitmap; |
| mIsMutable = isMutable; |
| mNinePatchChunk = ninePatchChunk; |
| } |
| |
| /** |
| * Free up the memory associated with this bitmap's pixels, and mark the |
| * bitmap as "dead", meaning it will throw an exception if getPixels() or |
| * setPixels() is called, and will draw nothing. This operation cannot be |
| * reversed, so it should only be called if you are sure there are no |
| * further uses for the bitmap. This is an advanced call, and normally need |
| * not be called, since the normal GC process will free up this memory when |
| * there are no more references to this bitmap. |
| */ |
| public void recycle() { |
| if (!mRecycled) { |
| nativeRecycle(mNativeBitmap); |
| mNinePatchChunk = null; |
| mRecycled = true; |
| } |
| } |
| |
| /** |
| * Returns true if this bitmap has been recycled. If so, then it is an error |
| * to try to access its pixels, and the bitmap will not draw. |
| * |
| * @return true if the bitmap has been recycled |
| */ |
| public final boolean isRecycled() { |
| return mRecycled; |
| } |
| |
| /** |
| * This is called by methods that want to throw an exception if the bitmap |
| * has already been recycled. |
| */ |
| private void checkRecycled(String errorMessage) { |
| if (mRecycled) { |
| throw new IllegalStateException(errorMessage); |
| } |
| } |
| |
| /** |
| * Common code for checking that x and y are >= 0 |
| * |
| * @param x x coordinate to ensure is >= 0 |
| * @param y y coordinate to ensure is >= 0 |
| */ |
| private static void checkXYSign(int x, int y) { |
| if (x < 0) { |
| throw new IllegalArgumentException("x must be >= 0"); |
| } |
| if (y < 0) { |
| throw new IllegalArgumentException("y must be >= 0"); |
| } |
| } |
| |
| /** |
| * Common code for checking that width and height are > 0 |
| * |
| * @param width width to ensure is > 0 |
| * @param height height to ensure is > 0 |
| */ |
| private static void checkWidthHeight(int width, int height) { |
| if (width <= 0) { |
| throw new IllegalArgumentException("width must be > 0"); |
| } |
| if (height <= 0) { |
| throw new IllegalArgumentException("height must be > 0"); |
| } |
| } |
| |
| public enum Config { |
| // these native values must match up with the enum in SkBitmap.h |
| ALPHA_8 (2), |
| RGB_565 (4), |
| ARGB_4444 (5), |
| ARGB_8888 (6); |
| |
| Config(int ni) { |
| this.nativeInt = ni; |
| } |
| final int nativeInt; |
| |
| /* package */ static Config nativeToConfig(int ni) { |
| return sConfigs[ni]; |
| } |
| |
| private static Config sConfigs[] = { |
| null, null, ALPHA_8, null, RGB_565, ARGB_4444, ARGB_8888 |
| }; |
| } |
| |
| /** |
| * Copy the bitmap's pixels into the specified buffer (allocated by the |
| * caller). An exception is thrown if the buffer is not large enough to |
| * hold all of the pixels (taking into account the number of bytes per |
| * pixel) or if the Buffer subclass is not one of the support types |
| * (ByteBuffer, ShortBuffer, IntBuffer). |
| */ |
| public void copyPixelsToBuffer(Buffer dst) { |
| int elements = dst.remaining(); |
| int shift; |
| if (dst instanceof ByteBuffer) { |
| shift = 0; |
| } else if (dst instanceof ShortBuffer) { |
| shift = 1; |
| } else if (dst instanceof IntBuffer) { |
| shift = 2; |
| } else { |
| throw new RuntimeException("unsupported Buffer subclass"); |
| } |
| |
| long bufferSize = (long)elements << shift; |
| long pixelSize = (long)getRowBytes() * getHeight(); |
| |
| if (bufferSize < pixelSize) { |
| throw new RuntimeException("Buffer not large enough for pixels"); |
| } |
| |
| nativeCopyPixelsToBuffer(mNativeBitmap, dst); |
| |
| // now update the buffer's position |
| int position = dst.position(); |
| position += pixelSize >> shift; |
| dst.position(position); |
| } |
| |
| /** |
| * Copy the pixels from the buffer, beginning at the current position, |
| * overwriting the bitmap's pixels. The data in the buffer is not changed |
| * in any way (unlike setPixels(), which converts from unpremultipled 32bit |
| * to whatever the bitmap's native format is. |
| */ |
| public void copyPixelsFromBuffer(Buffer src) { |
| checkRecycled("copyPixelsFromBuffer called on recycled bitmap"); |
| |
| int elements = src.remaining(); |
| int shift; |
| if (src instanceof ByteBuffer) { |
| shift = 0; |
| } else if (src instanceof ShortBuffer) { |
| shift = 1; |
| } else if (src instanceof IntBuffer) { |
| shift = 2; |
| } else { |
| throw new RuntimeException("unsupported Buffer subclass"); |
| } |
| |
| long bufferBytes = (long)elements << shift; |
| long bitmapBytes = (long)getRowBytes() * getHeight(); |
| |
| if (bufferBytes < bitmapBytes) { |
| throw new RuntimeException("Buffer not large enough for pixels"); |
| } |
| |
| nativeCopyPixelsFromBuffer(mNativeBitmap, src); |
| } |
| |
| /** |
| * Tries to make a new bitmap based on the dimensions of this bitmap, |
| * setting the new bitmap's config to the one specified, and then copying |
| * this bitmap's pixels into the new bitmap. If the conversion is not |
| * supported, or the allocator fails, then this returns NULL. |
| * |
| * @param config The desired config for the resulting bitmap |
| * @param isMutable True if the resulting bitmap should be mutable (i.e. |
| * its pixels can be modified) |
| * @return the new bitmap, or null if the copy could not be made. |
| */ |
| public Bitmap copy(Config config, boolean isMutable) { |
| checkRecycled("Can't copy a recycled bitmap"); |
| return nativeCopy(mNativeBitmap, config.nativeInt, isMutable); |
| } |
| |
| public static Bitmap createScaledBitmap(Bitmap src, int dstWidth, |
| int dstHeight, boolean filter) { |
| Matrix m = null; |
| synchronized (Bitmap.class) { |
| // small pool of just 1 matrix |
| m = sScaleMatrix; |
| sScaleMatrix = null; |
| } |
| |
| if (m == null) { |
| m = new Matrix(); |
| } |
| |
| final int width = src.getWidth(); |
| final int height = src.getHeight(); |
| final float sx = dstWidth / (float)width; |
| final float sy = dstHeight / (float)height; |
| m.setScale(sx, sy); |
| Bitmap b = Bitmap.createBitmap(src, 0, 0, width, height, m, filter); |
| |
| synchronized (Bitmap.class) { |
| // do we need to check for null? why not just assign everytime? |
| if (sScaleMatrix == null) { |
| sScaleMatrix = m; |
| } |
| } |
| |
| return b; |
| } |
| |
| /** |
| * Returns an immutable bitmap from the source bitmap. The new bitmap may |
| * be the same object as source, or a copy may have been made. |
| */ |
| public static Bitmap createBitmap(Bitmap src) { |
| return createBitmap(src, 0, 0, src.getWidth(), src.getHeight()); |
| } |
| |
| /** |
| * Returns an immutable bitmap from the specified subset of the source |
| * bitmap. The new bitmap may be the same object as source, or a copy may |
| * have been made. |
| * |
| * @param source The bitmap we are subsetting |
| * @param x The x coordinate of the first pixel in source |
| * @param y The y coordinate of the first pixel in source |
| * @param width The number of pixels in each row |
| * @param height The number of rows |
| */ |
| public static Bitmap createBitmap(Bitmap source, int x, int y, |
| int width, int height) { |
| return createBitmap(source, x, y, width, height, null, false); |
| } |
| |
| /** |
| * Returns an immutable bitmap from subset of the source bitmap, |
| * transformed by the optional matrix. |
| * |
| * @param source The bitmap we are subsetting |
| * @param x The x coordinate of the first pixel in source |
| * @param y The y coordinate of the first pixel in source |
| * @param width The number of pixels in each row |
| * @param height The number of rows |
| * @param m Option matrix to be applied to the pixels |
| * @param filter true if the source should be filtered. |
| * Only applies if the matrix contains more than just |
| * translation. |
| * @return A bitmap that represents the specified subset of source |
| * @throws IllegalArgumentException if the x, y, width, height values are |
| * outside of the dimensions of the source bitmap. |
| */ |
| public static Bitmap createBitmap(Bitmap source, int x, int y, int width, |
| int height, Matrix m, boolean filter) { |
| checkXYSign(x, y); |
| checkWidthHeight(width, height); |
| if (x + width > source.getWidth()) { |
| throw new IllegalArgumentException( |
| "x + width must be <= bitmap.width()"); |
| } |
| if (y + height > source.getHeight()) { |
| throw new IllegalArgumentException( |
| "y + height must be <= bitmap.height()"); |
| } |
| |
| // check if we can just return our argument unchanged |
| if (!source.isMutable() && x == 0 && y == 0 |
| && width == source.getWidth() && height == source.getHeight() |
| && (m == null || m.isIdentity())) { |
| return source; |
| } |
| |
| int neww = width; |
| int newh = height; |
| Canvas canvas = new Canvas(); |
| Bitmap bitmap; |
| Paint paint; |
| |
| Rect srcR = new Rect(x, y, x + width, y + height); |
| RectF dstR = new RectF(0, 0, width, height); |
| |
| if (m == null || m.isIdentity()) { |
| bitmap = createBitmap(neww, newh, source.hasAlpha() ? |
| Config.ARGB_8888 : Config.RGB_565); |
| paint = null; // not needed |
| } else { |
| /* the dst should have alpha if the src does, or if our matrix |
| doesn't preserve rectness |
| */ |
| boolean hasAlpha = source.hasAlpha() || !m.rectStaysRect(); |
| RectF deviceR = new RectF(); |
| m.mapRect(deviceR, dstR); |
| neww = Math.round(deviceR.width()); |
| newh = Math.round(deviceR.height()); |
| bitmap = createBitmap(neww, newh, hasAlpha ? |
| Config.ARGB_8888 : Config.RGB_565); |
| if (hasAlpha) { |
| bitmap.eraseColor(0); |
| } |
| canvas.translate(-deviceR.left, -deviceR.top); |
| canvas.concat(m); |
| paint = new Paint(); |
| paint.setFilterBitmap(filter); |
| if (!m.rectStaysRect()) { |
| paint.setAntiAlias(true); |
| } |
| } |
| canvas.setBitmap(bitmap); |
| canvas.drawBitmap(source, srcR, dstR, paint); |
| |
| return bitmap; |
| } |
| |
| /** |
| * Returns a mutable bitmap with the specified width and height. |
| * |
| * @param width The width of the bitmap |
| * @param height The height of the bitmap |
| * @param config The bitmap config to create. |
| * @throws IllegalArgumentException if the width or height are <= 0 |
| */ |
| public static Bitmap createBitmap(int width, int height, Config config) { |
| Bitmap bm = nativeCreate(null, 0, width, width, height, |
| config.nativeInt, true); |
| bm.eraseColor(0); // start with black/transparent pixels |
| return bm; |
| } |
| |
| /** |
| * Returns a immutable bitmap with the specified width and height, with each |
| * pixel value set to the corresponding value in the colors array. |
| * |
| * @param colors Array of {@link Color} used to initialize the pixels. |
| * @param offset Number of values to skip before the first color in the |
| * array of colors. |
| * @param stride Number of colors in the array between rows (must be >= |
| * width or <= -width). |
| * @param width The width of the bitmap |
| * @param height The height of the bitmap |
| * @param config The bitmap config to create. If the config does not |
| * support per-pixel alpha (e.g. RGB_565), then the alpha |
| * bytes in the colors[] will be ignored (assumed to be FF) |
| * @throws IllegalArgumentException if the width or height are <= 0, or if |
| * the color array's length is less than the number of pixels. |
| */ |
| public static Bitmap createBitmap(int colors[], int offset, int stride, |
| int width, int height, Config config) { |
| checkWidthHeight(width, height); |
| if (Math.abs(stride) < width) { |
| throw new IllegalArgumentException("abs(stride) must be >= width"); |
| } |
| int lastScanline = offset + (height - 1) * stride; |
| int length = colors.length; |
| if (offset < 0 || (offset + width > length) |
| || lastScanline < 0 |
| || (lastScanline + width > length)) { |
| throw new ArrayIndexOutOfBoundsException(); |
| } |
| return nativeCreate(colors, offset, stride, width, height, |
| config.nativeInt, false); |
| } |
| |
| /** |
| * Returns a immutable bitmap with the specified width and height, with each |
| * pixel value set to the corresponding value in the colors array. |
| * |
| * @param colors Array of {@link Color} used to initialize the pixels. |
| * This array must be at least as large as width * height. |
| * @param width The width of the bitmap |
| * @param height The height of the bitmap |
| * @param config The bitmap config to create. If the config does not |
| * support per-pixel alpha (e.g. RGB_565), then the alpha |
| * bytes in the colors[] will be ignored (assumed to be FF) |
| * @throws IllegalArgumentException if the width or height are <= 0, or if |
| * the color array's length is less than the number of pixels. |
| */ |
| public static Bitmap createBitmap(int colors[], int width, int height, |
| Config config) { |
| return createBitmap(colors, 0, width, width, height, config); |
| } |
| |
| /** |
| * Returns an optional array of private data, used by the UI system for |
| * some bitmaps. Not intended to be called by applications. |
| */ |
| public byte[] getNinePatchChunk() { |
| return mNinePatchChunk; |
| } |
| |
| /** |
| * Specifies the known formats a bitmap can be compressed into |
| */ |
| public enum CompressFormat { |
| JPEG (0), |
| PNG (1); |
| |
| CompressFormat(int nativeInt) { |
| this.nativeInt = nativeInt; |
| } |
| final int nativeInt; |
| } |
| |
| /** |
| * Number of bytes of temp storage we use for communicating between the |
| * native compressor and the java OutputStream. |
| */ |
| private final static int WORKING_COMPRESS_STORAGE = 4096; |
| |
| /** |
| * Write a compressed version of the bitmap to the specified outputstream. |
| * If this returns true, the bitmap can be reconstructed by passing a |
| * corresponding inputstream to BitmapFactory.decodeStream(). Note: not |
| * all Formats support all bitmap configs directly, so it is possible that |
| * the returned bitmap from BitmapFactory could be in a different bitdepth, |
| * and/or may have lost per-pixel alpha (e.g. JPEG only supports opaque |
| * pixels). |
| * |
| * @param format The format of the compressed image |
| * @param quality Hint to the compressor, 0-100. 0 meaning compress for |
| * small size, 100 meaning compress for max quality. Some |
| * formats, like PNG which is lossless, will ignore the |
| * quality setting |
| * @param stream The outputstream to write the compressed data. |
| * @return true if successfully compressed to the specified stream. |
| */ |
| public boolean compress(CompressFormat format, int quality, |
| OutputStream stream) { |
| checkRecycled("Can't compress a recycled bitmap"); |
| // do explicit check before calling the native method |
| if (stream == null) { |
| throw new NullPointerException(); |
| } |
| if (quality < 0 || quality > 100) { |
| throw new IllegalArgumentException("quality must be 0..100"); |
| } |
| return nativeCompress(mNativeBitmap, format.nativeInt, quality, |
| stream, new byte[WORKING_COMPRESS_STORAGE]); |
| } |
| |
| /** |
| * Returns true if the bitmap is marked as mutable (i.e. can be drawn into) |
| */ |
| public final boolean isMutable() { |
| return mIsMutable; |
| } |
| |
| /** Returns the bitmap's width */ |
| public final int getWidth() { |
| return mWidth == -1 ? mWidth = nativeWidth(mNativeBitmap) : mWidth; |
| } |
| |
| /** Returns the bitmap's height */ |
| public final int getHeight() { |
| return mHeight == -1 ? mHeight = nativeHeight(mNativeBitmap) : mHeight; |
| } |
| |
| /** |
| * Return the number of bytes between rows in the bitmap's pixels. Note that |
| * this refers to the pixels as stored natively by the bitmap. If you call |
| * getPixels() or setPixels(), then the pixels are uniformly treated as |
| * 32bit values, packed according to the Color class. |
| * |
| * @return number of bytes between rows of the native bitmap pixels. |
| */ |
| public final int getRowBytes() { |
| return nativeRowBytes(mNativeBitmap); |
| } |
| |
| /** |
| * If the bitmap's internal config is in one of the public formats, return |
| * that config, otherwise return null. |
| */ |
| public final Config getConfig() { |
| return Config.nativeToConfig(nativeConfig(mNativeBitmap)); |
| } |
| |
| /** Returns true if the bitmap's pixels support levels of alpha */ |
| public final boolean hasAlpha() { |
| return nativeHasAlpha(mNativeBitmap); |
| } |
| |
| /** |
| * Fills the bitmap's pixels with the specified {@link Color}. |
| * |
| * @throws IllegalStateException if the bitmap is not mutable. |
| */ |
| public void eraseColor(int c) { |
| checkRecycled("Can't erase a recycled bitmap"); |
| if (!isMutable()) { |
| throw new IllegalStateException("cannot erase immutable bitmaps"); |
| } |
| nativeErase(mNativeBitmap, c); |
| } |
| |
| /** |
| * Returns the {@link Color} at the specified location. Throws an exception |
| * if x or y are out of bounds (negative or >= to the width or height |
| * respectively). |
| * |
| * @param x The x coordinate (0...width-1) of the pixel to return |
| * @param y The y coordinate (0...height-1) of the pixel to return |
| * @return The argb {@link Color} at the specified coordinate |
| * @throws IllegalArgumentException if x, y exceed the bitmap's bounds |
| */ |
| public int getPixel(int x, int y) { |
| checkRecycled("Can't call getPixel() on a recycled bitmap"); |
| checkPixelAccess(x, y); |
| return nativeGetPixel(mNativeBitmap, x, y); |
| } |
| |
| /** |
| * Returns in pixels[] a copy of the data in the bitmap. Each value is |
| * a packed int representing a {@link Color}. The stride parameter allows |
| * the caller to allow for gaps in the returned pixels array between |
| * rows. For normal packed results, just pass width for the stride value. |
| * |
| * @param pixels The array to receive the bitmap's colors |
| * @param offset The first index to write into pixels[] |
| * @param stride The number of entries in pixels[] to skip between |
| * rows (must be >= bitmap's width). Can be negative. |
| * @param x The x coordinate of the first pixel to read from |
| * the bitmap |
| * @param y The y coordinate of the first pixel to read from |
| * the bitmap |
| * @param width The number of pixels to read from each row |
| * @param height The number of rows to read |
| * @throws IllegalArgumentException if x, y, width, height exceed the |
| * bounds of the bitmap, or if abs(stride) < width. |
| * @throws ArrayIndexOutOfBoundsException if the pixels array is too small |
| * to receive the specified number of pixels. |
| */ |
| public void getPixels(int[] pixels, int offset, int stride, |
| int x, int y, int width, int height) { |
| checkRecycled("Can't call getPixels() on a recycled bitmap"); |
| if (width == 0 || height == 0) { |
| return; // nothing to do |
| } |
| checkPixelsAccess(x, y, width, height, offset, stride, pixels); |
| nativeGetPixels(mNativeBitmap, pixels, offset, stride, |
| x, y, width, height); |
| } |
| |
| /** |
| * Shared code to check for illegal arguments passed to getPixel() |
| * or setPixel() |
| * @param x x coordinate of the pixel |
| * @param y y coordinate of the pixel |
| */ |
| private void checkPixelAccess(int x, int y) { |
| checkXYSign(x, y); |
| if (x >= getWidth()) { |
| throw new IllegalArgumentException("x must be < bitmap.width()"); |
| } |
| if (y >= getHeight()) { |
| throw new IllegalArgumentException("y must be < bitmap.height()"); |
| } |
| } |
| |
| /** |
| * Shared code to check for illegal arguments passed to getPixels() |
| * or setPixels() |
| * |
| * @param x left edge of the area of pixels to access |
| * @param y top edge of the area of pixels to access |
| * @param width width of the area of pixels to access |
| * @param height height of the area of pixels to access |
| * @param offset offset into pixels[] array |
| * @param stride number of elements in pixels[] between each logical row |
| * @param pixels array to hold the area of pixels being accessed |
| */ |
| private void checkPixelsAccess(int x, int y, int width, int height, |
| int offset, int stride, int pixels[]) { |
| checkXYSign(x, y); |
| if (width < 0) { |
| throw new IllegalArgumentException("width must be >= 0"); |
| } |
| if (height < 0) { |
| throw new IllegalArgumentException("height must be >= 0"); |
| } |
| if (x + width > getWidth()) { |
| throw new IllegalArgumentException( |
| "x + width must be <= bitmap.width()"); |
| } |
| if (y + height > getHeight()) { |
| throw new IllegalArgumentException( |
| "y + height must be <= bitmap.height()"); |
| } |
| if (Math.abs(stride) < width) { |
| throw new IllegalArgumentException("abs(stride) must be >= width"); |
| } |
| int lastScanline = offset + (height - 1) * stride; |
| int length = pixels.length; |
| if (offset < 0 || (offset + width > length) |
| || lastScanline < 0 |
| || (lastScanline + width > length)) { |
| throw new ArrayIndexOutOfBoundsException(); |
| } |
| } |
| |
| /** |
| * Write the specified {@link Color} into the bitmap (assuming it is |
| * mutable) at the x,y coordinate. |
| * |
| * @param x The x coordinate of the pixel to replace (0...width-1) |
| * @param y The y coordinate of the pixel to replace (0...height-1) |
| * @param color The {@link Color} to write into the bitmap |
| * @throws IllegalStateException if the bitmap is not mutable |
| * @throws IllegalArgumentException if x, y are outside of the bitmap's |
| * bounds. |
| */ |
| public void setPixel(int x, int y, int color) { |
| checkRecycled("Can't call setPixel() on a recycled bitmap"); |
| if (!isMutable()) { |
| throw new IllegalStateException(); |
| } |
| checkPixelAccess(x, y); |
| nativeSetPixel(mNativeBitmap, x, y, color); |
| } |
| |
| /** |
| * Replace pixels in the bitmap with the colors in the array. Each element |
| * in the array is a packed int prepresenting a {@link Color} |
| * |
| * @param pixels The colors to write to the bitmap |
| * @param offset The index of the first color to read from pixels[] |
| * @param stride The number of colors in pixels[] to skip between rows. |
| * Normally this value will be the same as the width of |
| * the bitmap, but it can be larger (or negative). |
| * @param x The x coordinate of the first pixel to write to in |
| * the bitmap. |
| * @param y The y coordinate of the first pixel to write to in |
| * the bitmap. |
| * @param width The number of colors to copy from pixels[] per row |
| * @param height The number of rows to write to the bitmap |
| * @throws IllegalStateException if the bitmap is not mutable |
| * @throws IllegalArgumentException if x, y, width, height are outside of |
| * the bitmap's bounds. |
| * @throws ArrayIndexOutOfBoundsException if the pixels array is too small |
| * to receive the specified number of pixels. |
| */ |
| public void setPixels(int[] pixels, int offset, int stride, |
| int x, int y, int width, int height) { |
| checkRecycled("Can't call setPixels() on a recycled bitmap"); |
| if (!isMutable()) { |
| throw new IllegalStateException(); |
| } |
| if (width == 0 || height == 0) { |
| return; // nothing to do |
| } |
| checkPixelsAccess(x, y, width, height, offset, stride, pixels); |
| nativeSetPixels(mNativeBitmap, pixels, offset, stride, |
| x, y, width, height); |
| } |
| |
| public static final Parcelable.Creator<Bitmap> CREATOR |
| = new Parcelable.Creator<Bitmap>() { |
| /** |
| * Rebuilds a bitmap previously stored with writeToParcel(). |
| * |
| * @param p Parcel object to read the bitmap from |
| * @return a new bitmap created from the data in the parcel |
| */ |
| public Bitmap createFromParcel(Parcel p) { |
| Bitmap bm = nativeCreateFromParcel(p); |
| if (bm == null) { |
| throw new RuntimeException("Failed to unparcel Bitmap"); |
| } |
| return bm; |
| } |
| public Bitmap[] newArray(int size) { |
| return new Bitmap[size]; |
| } |
| }; |
| |
| /** |
| * No special parcel contents. |
| */ |
| public int describeContents() { |
| return 0; |
| } |
| |
| /** |
| * Write the bitmap and its pixels to the parcel. The bitmap can be |
| * rebuilt from the parcel by calling CREATOR.createFromParcel(). |
| * @param p Parcel object to write the bitmap data into |
| */ |
| public void writeToParcel(Parcel p, int flags) { |
| checkRecycled("Can't parcel a recycled bitmap"); |
| if (!nativeWriteToParcel(mNativeBitmap, mIsMutable, p)) { |
| throw new RuntimeException("native writeToParcel failed"); |
| } |
| } |
| |
| /** |
| * Returns a new bitmap that captures the alpha values of the original. |
| * This may be drawn with Canvas.drawBitmap(), where the color(s) will be |
| * taken from the paint that is passed to the draw call. |
| * |
| * @return new bitmap containing the alpha channel of the original bitmap. |
| */ |
| public Bitmap extractAlpha() { |
| return extractAlpha(null, null); |
| } |
| |
| /** |
| * Returns a new bitmap that captures the alpha values of the original. |
| * These values may be affected by the optional Paint parameter, which |
| * can contain its own alpha, and may also contain a MaskFilter which |
| * could change the actual dimensions of the resulting bitmap (e.g. |
| * a blur maskfilter might enlarge the resulting bitmap). If offsetXY |
| * is not null, it returns the amount to offset the returned bitmap so |
| * that it will logically align with the original. For example, if the |
| * paint contains a blur of radius 2, then offsetXY[] would contains |
| * -2, -2, so that drawing the alpha bitmap offset by (-2, -2) and then |
| * drawing the original would result in the blur visually aligning with |
| * the original. |
| * @param paint Optional paint used to modify the alpha values in the |
| * resulting bitmap. Pass null for default behavior. |
| * @param offsetXY Optional array that returns the X (index 0) and Y |
| * (index 1) offset needed to position the returned bitmap |
| * so that it visually lines up with the original. |
| * @return new bitmap containing the (optionally modified by paint) alpha |
| * channel of the original bitmap. This may be drawn with |
| * Canvas.drawBitmap(), where the color(s) will be taken from the |
| * paint that is passed to the draw call. |
| */ |
| public Bitmap extractAlpha(Paint paint, int[] offsetXY) { |
| checkRecycled("Can't extractAlpha on a recycled bitmap"); |
| int nativePaint = paint != null ? paint.mNativePaint : 0; |
| Bitmap bm = nativeExtractAlpha(mNativeBitmap, nativePaint, offsetXY); |
| if (bm == null) { |
| throw new RuntimeException("Failed to extractAlpha on Bitmap"); |
| } |
| return bm; |
| } |
| |
| protected void finalize() throws Throwable { |
| try { |
| nativeDestructor(mNativeBitmap); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| //////////// native methods |
| |
| private static native Bitmap nativeCreate(int[] colors, int offset, |
| int stride, int width, int height, |
| int nativeConfig, boolean mutable); |
| private static native Bitmap nativeCopy(int srcBitmap, int nativeConfig, |
| boolean isMutable); |
| private static native void nativeDestructor(int nativeBitmap); |
| private static native void nativeRecycle(int nativeBitmap); |
| |
| private static native boolean nativeCompress(int nativeBitmap, int format, |
| int quality, OutputStream stream, |
| byte[] tempStorage); |
| private static native void nativeErase(int nativeBitmap, int color); |
| private static native int nativeWidth(int nativeBitmap); |
| private static native int nativeHeight(int nativeBitmap); |
| private static native int nativeRowBytes(int nativeBitmap); |
| private static native int nativeConfig(int nativeBitmap); |
| private static native boolean nativeHasAlpha(int nativeBitmap); |
| |
| private static native int nativeGetPixel(int nativeBitmap, int x, int y); |
| private static native void nativeGetPixels(int nativeBitmap, int[] pixels, |
| int offset, int stride, int x, |
| int y, int width, int height); |
| |
| private static native void nativeSetPixel(int nativeBitmap, int x, int y, |
| int color); |
| private static native void nativeSetPixels(int nativeBitmap, int[] colors, |
| int offset, int stride, int x, |
| int y, int width, int height); |
| private static native void nativeCopyPixelsToBuffer(int nativeBitmap, |
| Buffer dst); |
| private static native void nativeCopyPixelsFromBuffer(int nb, Buffer src); |
| |
| private static native Bitmap nativeCreateFromParcel(Parcel p); |
| // returns true on success |
| private static native boolean nativeWriteToParcel(int nativeBitmap, |
| boolean isMutable, |
| Parcel p); |
| // returns a new bitmap built from the native bitmap's alpha, and the paint |
| private static native Bitmap nativeExtractAlpha(int nativeBitmap, |
| int nativePaint, |
| int[] offsetXY); |
| |
| /* package */ final int ni() { |
| return mNativeBitmap; |
| } |
| } |
