| /* | |
| * 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 android.os.Parcel; | |
| import android.os.Parcelable; | |
| import android.util.DisplayMetrics; | |
| import java.io.OutputStream; | |
| import java.nio.Buffer; | |
| import java.nio.ByteBuffer; | |
| import java.nio.IntBuffer; | |
| import java.nio.ShortBuffer; | |
| public final class Bitmap implements Parcelable { | |
| /** | |
| * Indicates that the bitmap was created for an unknown pixel density. | |
| * | |
| * @see Bitmap#getDensity() | |
| * @see Bitmap#setDensity(int) | |
| */ | |
| public static final int DENSITY_NONE = 0; | |
| /** | |
| * Note: mNativeBitmap is used by FaceDetector_jni.cpp | |
| * Don't change/rename without updating FaceDetector_jni.cpp | |
| * | |
| * @hide | |
| */ | |
| public final int mNativeBitmap; | |
| /** | |
| * Backing buffer for the Bitmap. | |
| * Made public for quick access from drawing methods -- do NOT modify | |
| * from outside this class | |
| * | |
| * @hide | |
| */ | |
| @SuppressWarnings("UnusedDeclaration") // native code only | |
| public byte[] mBuffer; | |
| @SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"}) // Keep to finalize native resources | |
| private final BitmapFinalizer mFinalizer; | |
| private final boolean mIsMutable; | |
| /** | |
| * Represents whether the Bitmap's content is expected to be pre-multiplied. | |
| * Note that isPremultiplied() does not directly return this value, because | |
| * isPremultiplied() may never return true for a 565 Bitmap. | |
| * | |
| * setPremultiplied() does directly set the value so that setConfig() and | |
| * setPremultiplied() aren't order dependent, despite being setters. | |
| */ | |
| private boolean mIsPremultiplied; | |
| private byte[] mNinePatchChunk; // may be null | |
| private int[] mLayoutBounds; // may be null | |
| private int mWidth; | |
| private int mHeight; | |
| private boolean mRecycled; | |
| // Package-scoped for fast access. | |
| int mDensity = getDefaultDensity(); | |
| private static volatile Matrix sScaleMatrix; | |
| private static volatile int sDefaultDensity = -1; | |
| /** | |
| * For backwards compatibility, allows the app layer to change the default | |
| * density when running old apps. | |
| * @hide | |
| */ | |
| public static void setDefaultDensity(int density) { | |
| sDefaultDensity = density; | |
| } | |
| static int getDefaultDensity() { | |
| if (sDefaultDensity >= 0) { | |
| return sDefaultDensity; | |
| } | |
| //noinspection deprecation | |
| sDefaultDensity = DisplayMetrics.DENSITY_DEVICE; | |
| return sDefaultDensity; | |
| } | |
| /** | |
| * Private constructor that must received an already allocated native bitmap | |
| * int (pointer). | |
| */ | |
| @SuppressWarnings({"UnusedDeclaration"}) // called from JNI | |
| Bitmap(int nativeBitmap, byte[] buffer, int width, int height, int density, | |
| boolean isMutable, boolean isPremultiplied, | |
| byte[] ninePatchChunk, int[] layoutBounds) { | |
| if (nativeBitmap == 0) { | |
| throw new RuntimeException("internal error: native bitmap is 0"); | |
| } | |
| mWidth = width; | |
| mHeight = height; | |
| mIsMutable = isMutable; | |
| mIsPremultiplied = isPremultiplied; | |
| mBuffer = buffer; | |
| // we delete this in our finalizer | |
| mNativeBitmap = nativeBitmap; | |
| mFinalizer = new BitmapFinalizer(nativeBitmap); | |
| mNinePatchChunk = ninePatchChunk; | |
| mLayoutBounds = layoutBounds; | |
| if (density >= 0) { | |
| mDensity = density; | |
| } | |
| } | |
| /** | |
| * Native bitmap has been reconfigured, so set premult and cached | |
| * width/height values | |
| */ | |
| @SuppressWarnings({"UnusedDeclaration"}) // called from JNI | |
| void reinit(int width, int height, boolean isPremultiplied) { | |
| mWidth = width; | |
| mHeight = height; | |
| mIsPremultiplied = isPremultiplied; | |
| } | |
| /** | |
| * <p>Returns the density for this bitmap.</p> | |
| * | |
| * <p>The default density is the same density as the current display, | |
| * unless the current application does not support different screen | |
| * densities in which case it is | |
| * {@link android.util.DisplayMetrics#DENSITY_DEFAULT}. Note that | |
| * compatibility mode is determined by the application that was initially | |
| * loaded into a process -- applications that share the same process should | |
| * all have the same compatibility, or ensure they explicitly set the | |
| * density of their bitmaps appropriately.</p> | |
| * | |
| * @return A scaling factor of the default density or {@link #DENSITY_NONE} | |
| * if the scaling factor is unknown. | |
| * | |
| * @see #setDensity(int) | |
| * @see android.util.DisplayMetrics#DENSITY_DEFAULT | |
| * @see android.util.DisplayMetrics#densityDpi | |
| * @see #DENSITY_NONE | |
| */ | |
| public int getDensity() { | |
| return mDensity; | |
| } | |
| /** | |
| * <p>Specifies the density for this bitmap. When the bitmap is | |
| * drawn to a Canvas that also has a density, it will be scaled | |
| * appropriately.</p> | |
| * | |
| * @param density The density scaling factor to use with this bitmap or | |
| * {@link #DENSITY_NONE} if the density is unknown. | |
| * | |
| * @see #getDensity() | |
| * @see android.util.DisplayMetrics#DENSITY_DEFAULT | |
| * @see android.util.DisplayMetrics#densityDpi | |
| * @see #DENSITY_NONE | |
| */ | |
| public void setDensity(int density) { | |
| mDensity = density; | |
| } | |
| /** | |
| * <p>Modifies the bitmap to have a specified width, height, and {@link | |
| * Config}, without affecting the underlying allocation backing the bitmap. | |
| * Bitmap pixel data is not re-initialized for the new configuration.</p> | |
| * | |
| * <p>This method can be used to avoid allocating a new bitmap, instead | |
| * reusing an existing bitmap's allocation for a new configuration of equal | |
| * or lesser size. If the Bitmap's allocation isn't large enough to support | |
| * the new configuration, an IllegalArgumentException will be thrown and the | |
| * bitmap will not be modified.</p> | |
| * | |
| * <p>The result of {@link #getByteCount()} will reflect the new configuration, | |
| * while {@link #getAllocationByteCount()} will reflect that of the initial | |
| * configuration.</p> | |
| * | |
| * <p>WARNING: This method should NOT be called on a bitmap currently used | |
| * by the view system. It does not make guarantees about how the underlying | |
| * pixel buffer is remapped to the new config, just that the allocation is | |
| * reused. Additionally, the view system does not account for bitmap | |
| * properties being modifying during use, e.g. while attached to | |
| * drawables.</p> | |
| * | |
| * @see #setWidth(int) | |
| * @see #setHeight(int) | |
| * @see #setConfig(Config) | |
| */ | |
| public void reconfigure(int width, int height, Config config) { | |
| checkRecycled("Can't call reconfigure() on a recycled bitmap"); | |
| if (width <= 0 || height <= 0) { | |
| throw new IllegalArgumentException("width and height must be > 0"); | |
| } | |
| if (!isMutable()) { | |
| throw new IllegalStateException("only mutable bitmaps may be reconfigured"); | |
| } | |
| if (mBuffer == null) { | |
| throw new IllegalStateException("native-backed bitmaps may not be reconfigured"); | |
| } | |
| nativeReconfigure(mNativeBitmap, width, height, config.nativeInt, mBuffer.length); | |
| mWidth = width; | |
| mHeight = height; | |
| } | |
| /** | |
| * <p>Convenience method for calling {@link #reconfigure(int, int, Config)} | |
| * with the current height and config.</p> | |
| * | |
| * <p>WARNING: this method should not be used on bitmaps currently used by | |
| * the view system, see {@link #reconfigure(int, int, Config)} for more | |
| * details.</p> | |
| * | |
| * @see #reconfigure(int, int, Config) | |
| * @see #setHeight(int) | |
| * @see #setConfig(Config) | |
| */ | |
| public void setWidth(int width) { | |
| reconfigure(width, getHeight(), getConfig()); | |
| } | |
| /** | |
| * <p>Convenience method for calling {@link #reconfigure(int, int, Config)} | |
| * with the current width and config.</p> | |
| * | |
| * <p>WARNING: this method should not be used on bitmaps currently used by | |
| * the view system, see {@link #reconfigure(int, int, Config)} for more | |
| * details.</p> | |
| * | |
| * @see #reconfigure(int, int, Config) | |
| * @see #setWidth(int) | |
| * @see #setConfig(Config) | |
| */ | |
| public void setHeight(int height) { | |
| reconfigure(getWidth(), height, getConfig()); | |
| } | |
| /** | |
| * <p>Convenience method for calling {@link #reconfigure(int, int, Config)} | |
| * with the current height and width.</p> | |
| * | |
| * <p>WARNING: this method should not be used on bitmaps currently used by | |
| * the view system, see {@link #reconfigure(int, int, Config)} for more | |
| * details.</p> | |
| * | |
| * @see #reconfigure(int, int, Config) | |
| * @see #setWidth(int) | |
| * @see #setHeight(int) | |
| */ | |
| public void setConfig(Config config) { | |
| reconfigure(getWidth(), getHeight(), config); | |
| } | |
| /** | |
| * Sets the nine patch chunk. | |
| * | |
| * @param chunk The definition of the nine patch | |
| * | |
| * @hide | |
| */ | |
| public void setNinePatchChunk(byte[] chunk) { | |
| mNinePatchChunk = chunk; | |
| } | |
| /** | |
| * Sets the layout bounds as an array of left, top, right, bottom integers | |
| * @param bounds the array containing the padding values | |
| * | |
| * @hide | |
| */ | |
| public void setLayoutBounds(int[] bounds) { | |
| mLayoutBounds = bounds; | |
| } | |
| /** | |
| * Free the native object associated with this bitmap, and clear the | |
| * reference to the pixel data. This will not free the pixel data synchronously; | |
| * it simply allows it to be garbage collected if there are no other references. | |
| * The bitmap is marked 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) { | |
| if (nativeRecycle(mNativeBitmap)) { | |
| // return value indicates whether native pixel object was actually recycled. | |
| // false indicates that it is still in use at the native level and these | |
| // objects should not be collected now. They will be collected later when the | |
| // Bitmap itself is collected. | |
| mBuffer = null; | |
| 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; | |
| } | |
| /** | |
| * Returns the generation ID of this bitmap. The generation ID changes | |
| * whenever the bitmap is modified. This can be used as an efficient way to | |
| * check if a bitmap has changed. | |
| * | |
| * @return The current generation ID for this bitmap. | |
| */ | |
| public int getGenerationId() { | |
| return nativeGenerationId(mNativeBitmap); | |
| } | |
| /** | |
| * 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"); | |
| } | |
| } | |
| /** | |
| * Possible bitmap configurations. A bitmap configuration describes | |
| * how pixels are stored. This affects the quality (color depth) as | |
| * well as the ability to display transparent/translucent colors. | |
| */ | |
| public enum Config { | |
| // these native values must match up with the enum in SkBitmap.h | |
| /** | |
| * Each pixel is stored as a single translucency (alpha) channel. | |
| * This is very useful to efficiently store masks for instance. | |
| * No color information is stored. | |
| * With this configuration, each pixel requires 1 byte of memory. | |
| */ | |
| ALPHA_8 (1), | |
| /** | |
| * Each pixel is stored on 2 bytes and only the RGB channels are | |
| * encoded: red is stored with 5 bits of precision (32 possible | |
| * values), green is stored with 6 bits of precision (64 possible | |
| * values) and blue is stored with 5 bits of precision. | |
| * | |
| * This configuration can produce slight visual artifacts depending | |
| * on the configuration of the source. For instance, without | |
| * dithering, the result might show a greenish tint. To get better | |
| * results dithering should be applied. | |
| * | |
| * This configuration may be useful when using opaque bitmaps | |
| * that do not require high color fidelity. | |
| */ | |
| RGB_565 (3), | |
| /** | |
| * Each pixel is stored on 2 bytes. The three RGB color channels | |
| * and the alpha channel (translucency) are stored with a 4 bits | |
| * precision (16 possible values.) | |
| * | |
| * This configuration is mostly useful if the application needs | |
| * to store translucency information but also needs to save | |
| * memory. | |
| * | |
| * It is recommended to use {@link #ARGB_8888} instead of this | |
| * configuration. | |
| * | |
| * Note: as of {@link android.os.Build.VERSION_CODES#KITKAT}, | |
| * any bitmap created with this configuration will be created | |
| * using {@link #ARGB_8888} instead. | |
| * | |
| * @deprecated Because of the poor quality of this configuration, | |
| * it is advised to use {@link #ARGB_8888} instead. | |
| */ | |
| @Deprecated | |
| ARGB_4444 (4), | |
| /** | |
| * Each pixel is stored on 4 bytes. Each channel (RGB and alpha | |
| * for translucency) is stored with 8 bits of precision (256 | |
| * possible values.) | |
| * | |
| * This configuration is very flexible and offers the best | |
| * quality. It should be used whenever possible. | |
| */ | |
| ARGB_8888 (5); | |
| final int nativeInt; | |
| @SuppressWarnings({"deprecation"}) | |
| private static Config sConfigs[] = { | |
| null, ALPHA_8, null, RGB_565, ARGB_4444, ARGB_8888 | |
| }; | |
| Config(int ni) { | |
| this.nativeInt = ni; | |
| } | |
| static Config nativeToConfig(int ni) { | |
| return sConfigs[ni]; | |
| } | |
| } | |
| /** | |
| * <p>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).</p> | |
| * <p>The content of the bitmap is copied into the buffer as-is. This means | |
| * that if this bitmap stores its pixels pre-multiplied | |
| * (see {@link #isPremultiplied()}, the values in the buffer will also be | |
| * pre-multiplied.</p> | |
| * <p>After this method returns, the current position of the buffer is | |
| * updated: the position is incremented by the number of elements written | |
| * in the buffer.</p> | |
| */ | |
| 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 = getByteCount(); | |
| 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); | |
| } | |
| /** | |
| * <p>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.</p> | |
| * <p>After this method returns, the current position of the buffer is | |
| * updated: the position is incremented by the number of elements read from | |
| * the buffer. If you need to read the bitmap from the buffer again you must | |
| * first rewind the buffer.</p> | |
| */ | |
| 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 = getByteCount(); | |
| if (bufferBytes < bitmapBytes) { | |
| throw new RuntimeException("Buffer not large enough for pixels"); | |
| } | |
| nativeCopyPixelsFromBuffer(mNativeBitmap, src); | |
| // now update the buffer's position | |
| int position = src.position(); | |
| position += bitmapBytes >> shift; | |
| src.position(position); | |
| } | |
| /** | |
| * 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. The returned | |
| * bitmap initially has the same density as the original. | |
| * | |
| * @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"); | |
| Bitmap b = nativeCopy(mNativeBitmap, config.nativeInt, isMutable); | |
| if (b != null) { | |
| b.setAlphaAndPremultiplied(hasAlpha(), mIsPremultiplied); | |
| b.mDensity = mDensity; | |
| } | |
| return b; | |
| } | |
| /** | |
| * Creates a new bitmap, scaled from an existing bitmap, when possible. If the | |
| * specified width and height are the same as the current width and height of | |
| * the source bitmap, the source bitmap is returned and no new bitmap is | |
| * created. | |
| * | |
| * @param src The source bitmap. | |
| * @param dstWidth The new bitmap's desired width. | |
| * @param dstHeight The new bitmap's desired height. | |
| * @param filter true if the source should be filtered. | |
| * @return The new scaled bitmap or the source bitmap if no scaling is required. | |
| * @throws IllegalArgumentException if width is <= 0, or height is <= 0 | |
| */ | |
| public static Bitmap createScaledBitmap(Bitmap src, int dstWidth, int dstHeight, | |
| boolean filter) { | |
| Matrix m; | |
| 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. It is | |
| * initialized with the same density as the original bitmap. | |
| */ | |
| 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. It is initialized with the same density as the original | |
| * bitmap. | |
| * | |
| * @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 | |
| * @return A copy of a subset of the source bitmap or the source bitmap itself. | |
| * @throws IllegalArgumentException if the x, y, width, height values are | |
| * outside of the dimensions of the source bitmap, or width is <= 0, | |
| * or height is <= 0 | |
| */ | |
| 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. The new bitmap may be the | |
| * same object as source, or a copy may have been made. It is | |
| * initialized with the same density as the original bitmap. | |
| * | |
| * If the source bitmap is immutable and the requested subset is the | |
| * same as the source bitmap itself, then the source bitmap is | |
| * returned and no new bitmap is created. | |
| * | |
| * @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 Optional 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, or width is <= 0, | |
| * or height is <= 0 | |
| */ | |
| 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); | |
| Config newConfig = Config.ARGB_8888; | |
| final Config config = source.getConfig(); | |
| // GIF files generate null configs, assume ARGB_8888 | |
| if (config != null) { | |
| switch (config) { | |
| case RGB_565: | |
| newConfig = Config.RGB_565; | |
| break; | |
| case ALPHA_8: | |
| newConfig = Config.ALPHA_8; | |
| break; | |
| //noinspection deprecation | |
| case ARGB_4444: | |
| case ARGB_8888: | |
| default: | |
| newConfig = Config.ARGB_8888; | |
| break; | |
| } | |
| } | |
| if (m == null || m.isIdentity()) { | |
| bitmap = createBitmap(neww, newh, newConfig, source.hasAlpha()); | |
| paint = null; // not needed | |
| } else { | |
| final boolean transformed = !m.rectStaysRect(); | |
| RectF deviceR = new RectF(); | |
| m.mapRect(deviceR, dstR); | |
| neww = Math.round(deviceR.width()); | |
| newh = Math.round(deviceR.height()); | |
| bitmap = createBitmap(neww, newh, transformed ? Config.ARGB_8888 : newConfig, | |
| transformed || source.hasAlpha()); | |
| canvas.translate(-deviceR.left, -deviceR.top); | |
| canvas.concat(m); | |
| paint = new Paint(); | |
| paint.setFilterBitmap(filter); | |
| if (transformed) { | |
| paint.setAntiAlias(true); | |
| } | |
| } | |
| // The new bitmap was created from a known bitmap source so assume that | |
| // they use the same density | |
| bitmap.mDensity = source.mDensity; | |
| bitmap.setAlphaAndPremultiplied(source.hasAlpha(), source.mIsPremultiplied); | |
| canvas.setBitmap(bitmap); | |
| canvas.drawBitmap(source, srcR, dstR, paint); | |
| canvas.setBitmap(null); | |
| return bitmap; | |
| } | |
| /** | |
| * Returns a mutable bitmap with the specified width and height. Its | |
| * initial density is as per {@link #getDensity}. | |
| * | |
| * @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) { | |
| return createBitmap(width, height, config, true); | |
| } | |
| /** | |
| * Returns a mutable bitmap with the specified width and height. Its | |
| * initial density is determined from the given {@link DisplayMetrics}. | |
| * | |
| * @param display Display metrics for the display this bitmap will be | |
| * drawn on. | |
| * @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(DisplayMetrics display, int width, | |
| int height, Config config) { | |
| return createBitmap(display, width, height, config, true); | |
| } | |
| /** | |
| * Returns a mutable bitmap with the specified width and height. Its | |
| * initial density is as per {@link #getDensity}. | |
| * | |
| * @param width The width of the bitmap | |
| * @param height The height of the bitmap | |
| * @param config The bitmap config to create. | |
| * @param hasAlpha If the bitmap is ARGB_8888 this flag can be used to mark the | |
| * bitmap as opaque. Doing so will clear the bitmap in black | |
| * instead of transparent. | |
| * | |
| * @throws IllegalArgumentException if the width or height are <= 0 | |
| */ | |
| private static Bitmap createBitmap(int width, int height, Config config, boolean hasAlpha) { | |
| return createBitmap(null, width, height, config, hasAlpha); | |
| } | |
| /** | |
| * Returns a mutable bitmap with the specified width and height. Its | |
| * initial density is determined from the given {@link DisplayMetrics}. | |
| * | |
| * @param display Display metrics for the display this bitmap will be | |
| * drawn on. | |
| * @param width The width of the bitmap | |
| * @param height The height of the bitmap | |
| * @param config The bitmap config to create. | |
| * @param hasAlpha If the bitmap is ARGB_8888 this flag can be used to mark the | |
| * bitmap as opaque. Doing so will clear the bitmap in black | |
| * instead of transparent. | |
| * | |
| * @throws IllegalArgumentException if the width or height are <= 0 | |
| */ | |
| private static Bitmap createBitmap(DisplayMetrics display, int width, int height, | |
| Config config, boolean hasAlpha) { | |
| if (width <= 0 || height <= 0) { | |
| throw new IllegalArgumentException("width and height must be > 0"); | |
| } | |
| Bitmap bm = nativeCreate(null, 0, width, width, height, config.nativeInt, true); | |
| if (display != null) { | |
| bm.mDensity = display.densityDpi; | |
| } | |
| bm.setHasAlpha(hasAlpha); | |
| if (config == Config.ARGB_8888 && !hasAlpha) { | |
| nativeErase(bm.mNativeBitmap, 0xff000000); | |
| } | |
| // No need to initialize the bitmap to zeroes with other configs; | |
| // it is backed by a VM byte array which is by definition preinitialized | |
| // to all zeroes. | |
| 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. Its | |
| * initial density is as per {@link #getDensity}. | |
| * | |
| * @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) { | |
| return createBitmap(null, colors, offset, stride, width, height, config); | |
| } | |
| /** | |
| * Returns a immutable bitmap with the specified width and height, with each | |
| * pixel value set to the corresponding value in the colors array. Its | |
| * initial density is determined from the given {@link DisplayMetrics}. | |
| * | |
| * @param display Display metrics for the display this bitmap will be | |
| * drawn on. | |
| * @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(DisplayMetrics display, 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(); | |
| } | |
| if (width <= 0 || height <= 0) { | |
| throw new IllegalArgumentException("width and height must be > 0"); | |
| } | |
| Bitmap bm = nativeCreate(colors, offset, stride, width, height, | |
| config.nativeInt, false); | |
| if (display != null) { | |
| bm.mDensity = display.densityDpi; | |
| } | |
| 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. Its | |
| * initial density is as per {@link #getDensity}. | |
| * | |
| * @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(null, colors, 0, width, width, height, config); | |
| } | |
| /** | |
| * Returns a immutable bitmap with the specified width and height, with each | |
| * pixel value set to the corresponding value in the colors array. Its | |
| * initial density is determined from the given {@link DisplayMetrics}. | |
| * | |
| * @param display Display metrics for the display this bitmap will be | |
| * drawn on. | |
| * @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(DisplayMetrics display, int colors[], | |
| int width, int height, Config config) { | |
| return createBitmap(display, 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; | |
| } | |
| /** | |
| * @hide | |
| * @return the layout padding [left, right, top, bottom] | |
| */ | |
| public int[] getLayoutBounds() { | |
| return mLayoutBounds; | |
| } | |
| /** | |
| * Specifies the known formats a bitmap can be compressed into | |
| */ | |
| public enum CompressFormat { | |
| JPEG (0), | |
| PNG (1), | |
| WEBP (2); | |
| 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; | |
| } | |
| /** | |
| * <p>Indicates whether pixels stored in this bitmaps are stored pre-multiplied. | |
| * When a pixel is pre-multiplied, the RGB components have been multiplied by | |
| * the alpha component. For instance, if the original color is a 50% | |
| * translucent red <code>(128, 255, 0, 0)</code>, the pre-multiplied form is | |
| * <code>(128, 128, 0, 0)</code>.</p> | |
| * | |
| * <p>This method always returns false if {@link #getConfig()} is | |
| * {@link Bitmap.Config#RGB_565}.</p> | |
| * | |
| * <p>This method only returns true if {@link #hasAlpha()} returns true. | |
| * A bitmap with no alpha channel can be used both as a pre-multiplied and | |
| * as a non pre-multiplied bitmap.</p> | |
| * | |
| * <p>Only pre-multiplied bitmaps may be drawn by the view system or | |
| * {@link Canvas}. If a non-pre-multiplied bitmap with an alpha channel is | |
| * drawn to a Canvas, a RuntimeException will be thrown.</p> | |
| * | |
| * @return true if the underlying pixels have been pre-multiplied, false | |
| * otherwise | |
| * | |
| * @see Bitmap#setPremultiplied(boolean) | |
| * @see BitmapFactory.Options#inPremultiplied | |
| */ | |
| public final boolean isPremultiplied() { | |
| return mIsPremultiplied && getConfig() != Config.RGB_565 && hasAlpha(); | |
| } | |
| /** | |
| * Sets whether the bitmap should treat its data as pre-multiplied. | |
| * | |
| * <p>Bitmaps are always treated as pre-multiplied by the view system and | |
| * {@link Canvas} for performance reasons. Storing un-pre-multiplied data in | |
| * a Bitmap (through {@link #setPixel}, {@link #setPixels}, or {@link | |
| * BitmapFactory.Options#inPremultiplied BitmapFactory.Options.inPremultiplied}) | |
| * can lead to incorrect blending if drawn by the framework.</p> | |
| * | |
| * <p>This method will not affect the behavior of a bitmap without an alpha | |
| * channel, or if {@link #hasAlpha()} returns false.</p> | |
| * | |
| * <p>Calling createBitmap() or createScaledBitmap() with a source | |
| * Bitmap whose colors are not pre-multiplied may result in a RuntimeException, | |
| * since those functions require drawing the source, which is not supported for | |
| * un-pre-multiplied Bitmaps.</p> | |
| * | |
| * @see Bitmap#isPremultiplied() | |
| * @see BitmapFactory.Options#inPremultiplied | |
| */ | |
| public final void setPremultiplied(boolean premultiplied) { | |
| mIsPremultiplied = premultiplied; | |
| nativeSetAlphaAndPremultiplied(mNativeBitmap, hasAlpha(), premultiplied); | |
| } | |
| /** Helper function to set both alpha and premultiplied. **/ | |
| private final void setAlphaAndPremultiplied(boolean hasAlpha, boolean premultiplied) { | |
| mIsPremultiplied = premultiplied; | |
| nativeSetAlphaAndPremultiplied(mNativeBitmap, hasAlpha, premultiplied); | |
| } | |
| /** Returns the bitmap's width */ | |
| public final int getWidth() { | |
| return mWidth; | |
| } | |
| /** Returns the bitmap's height */ | |
| public final int getHeight() { | |
| return mHeight; | |
| } | |
| /** | |
| * Convenience for calling {@link #getScaledWidth(int)} with the target | |
| * density of the given {@link Canvas}. | |
| */ | |
| public int getScaledWidth(Canvas canvas) { | |
| return scaleFromDensity(getWidth(), mDensity, canvas.mDensity); | |
| } | |
| /** | |
| * Convenience for calling {@link #getScaledHeight(int)} with the target | |
| * density of the given {@link Canvas}. | |
| */ | |
| public int getScaledHeight(Canvas canvas) { | |
| return scaleFromDensity(getHeight(), mDensity, canvas.mDensity); | |
| } | |
| /** | |
| * Convenience for calling {@link #getScaledWidth(int)} with the target | |
| * density of the given {@link DisplayMetrics}. | |
| */ | |
| public int getScaledWidth(DisplayMetrics metrics) { | |
| return scaleFromDensity(getWidth(), mDensity, metrics.densityDpi); | |
| } | |
| /** | |
| * Convenience for calling {@link #getScaledHeight(int)} with the target | |
| * density of the given {@link DisplayMetrics}. | |
| */ | |
| public int getScaledHeight(DisplayMetrics metrics) { | |
| return scaleFromDensity(getHeight(), mDensity, metrics.densityDpi); | |
| } | |
| /** | |
| * Convenience method that returns the width of this bitmap divided | |
| * by the density scale factor. | |
| * | |
| * @param targetDensity The density of the target canvas of the bitmap. | |
| * @return The scaled width of this bitmap, according to the density scale factor. | |
| */ | |
| public int getScaledWidth(int targetDensity) { | |
| return scaleFromDensity(getWidth(), mDensity, targetDensity); | |
| } | |
| /** | |
| * Convenience method that returns the height of this bitmap divided | |
| * by the density scale factor. | |
| * | |
| * @param targetDensity The density of the target canvas of the bitmap. | |
| * @return The scaled height of this bitmap, according to the density scale factor. | |
| */ | |
| public int getScaledHeight(int targetDensity) { | |
| return scaleFromDensity(getHeight(), mDensity, targetDensity); | |
| } | |
| /** | |
| * @hide | |
| */ | |
| static public int scaleFromDensity(int size, int sdensity, int tdensity) { | |
| if (sdensity == DENSITY_NONE || tdensity == DENSITY_NONE || sdensity == tdensity) { | |
| return size; | |
| } | |
| // Scale by tdensity / sdensity, rounding up. | |
| return ((size * tdensity) + (sdensity >> 1)) / sdensity; | |
| } | |
| /** | |
| * 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. | |
| * | |
| * <p>As of {@link android.os.Build.VERSION_CODES#KITKAT}, this method | |
| * should not be used to calculate the memory usage of the bitmap. Instead, | |
| * see {@link #getAllocationByteCount()}. | |
| * | |
| * @return number of bytes between rows of the native bitmap pixels. | |
| */ | |
| public final int getRowBytes() { | |
| return nativeRowBytes(mNativeBitmap); | |
| } | |
| /** | |
| * Returns the minimum number of bytes that can be used to store this bitmap's pixels. | |
| * | |
| * <p>As of {@link android.os.Build.VERSION_CODES#KITKAT}, the result of this method can | |
| * no longer be used to determine memory usage of a bitmap. See {@link | |
| * #getAllocationByteCount()}.</p> | |
| */ | |
| public final int getByteCount() { | |
| // int result permits bitmaps up to 46,340 x 46,340 | |
| return getRowBytes() * getHeight(); | |
| } | |
| /** | |
| * Returns the size of the allocated memory used to store this bitmap's pixels. | |
| * | |
| * <p>This can be larger than the result of {@link #getByteCount()} if a bitmap is reused to | |
| * decode other bitmaps of smaller size, or by manual reconfiguration. See {@link | |
| * #reconfigure(int, int, Config)}, {@link #setWidth(int)}, {@link #setHeight(int)}, {@link | |
| * #setConfig(Bitmap.Config)}, and {@link BitmapFactory.Options#inBitmap | |
| * BitmapFactory.Options.inBitmap}. If a bitmap is not modified in this way, this value will be | |
| * the same as that returned by {@link #getByteCount()}.</p> | |
| * | |
| * <p>This value will not change over the lifetime of a Bitmap.</p> | |
| * | |
| * @see #reconfigure(int, int, Config) | |
| */ | |
| public final int getAllocationByteCount() { | |
| if (mBuffer == null) { | |
| // native backed bitmaps don't support reconfiguration, | |
| // so alloc size is always content size | |
| return getByteCount(); | |
| } | |
| return mBuffer.length; | |
| } | |
| /** | |
| * 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 config supports per-pixel alpha, and | |
| * if the pixels may contain non-opaque alpha values. For some configs, | |
| * this is always false (e.g. RGB_565), since they do not support per-pixel | |
| * alpha. However, for configs that do, the bitmap may be flagged to be | |
| * known that all of its pixels are opaque. In this case hasAlpha() will | |
| * also return false. If a config such as ARGB_8888 is not so flagged, | |
| * it will return true by default. | |
| */ | |
| public final boolean hasAlpha() { | |
| return nativeHasAlpha(mNativeBitmap); | |
| } | |
| /** | |
| * Tell the bitmap if all of the pixels are known to be opaque (false) | |
| * or if some of the pixels may contain non-opaque alpha values (true). | |
| * Note, for some configs (e.g. RGB_565) this call is ignored, since it | |
| * does not support per-pixel alpha values. | |
| * | |
| * This is meant as a drawing hint, as in some cases a bitmap that is known | |
| * to be opaque can take a faster drawing case than one that may have | |
| * non-opaque per-pixel alpha values. | |
| */ | |
| public void setHasAlpha(boolean hasAlpha) { | |
| nativeSetAlphaAndPremultiplied(mNativeBitmap, hasAlpha, mIsPremultiplied); | |
| } | |
| /** | |
| * Indicates whether the renderer responsible for drawing this | |
| * bitmap should attempt to use mipmaps when this bitmap is drawn | |
| * scaled down. | |
| * | |
| * If you know that you are going to draw this bitmap at less than | |
| * 50% of its original size, you may be able to obtain a higher | |
| * quality | |
| * | |
| * This property is only a suggestion that can be ignored by the | |
| * renderer. It is not guaranteed to have any effect. | |
| * | |
| * @return true if the renderer should attempt to use mipmaps, | |
| * false otherwise | |
| * | |
| * @see #setHasMipMap(boolean) | |
| */ | |
| public final boolean hasMipMap() { | |
| return nativeHasMipMap(mNativeBitmap); | |
| } | |
| /** | |
| * Set a hint for the renderer responsible for drawing this bitmap | |
| * indicating that it should attempt to use mipmaps when this bitmap | |
| * is drawn scaled down. | |
| * | |
| * If you know that you are going to draw this bitmap at less than | |
| * 50% of its original size, you may be able to obtain a higher | |
| * quality by turning this property on. | |
| * | |
| * Note that if the renderer respects this hint it might have to | |
| * allocate extra memory to hold the mipmap levels for this bitmap. | |
| * | |
| * This property is only a suggestion that can be ignored by the | |
| * renderer. It is not guaranteed to have any effect. | |
| * | |
| * @param hasMipMap indicates whether the renderer should attempt | |
| * to use mipmaps | |
| * | |
| * @see #hasMipMap() | |
| */ | |
| public final void setHasMipMap(boolean hasMipMap) { | |
| nativeSetHasMipMap(mNativeBitmap, hasMipMap); | |
| } | |
| /** | |
| * 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). The returned color is a non-premultiplied ARGB value. | |
| * | |
| * @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, mIsPremultiplied); | |
| } | |
| /** | |
| * 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. | |
| * The returned colors are non-premultiplied ARGB values. | |
| * | |
| * @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, mIsPremultiplied); | |
| } | |
| /** | |
| * 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(); | |
| } | |
| } | |
| /** | |
| * <p>Write the specified {@link Color} into the bitmap (assuming it is | |
| * mutable) at the x,y coordinate. The color must be a | |
| * non-premultiplied ARGB value.</p> | |
| * | |
| * @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 ARGB 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, mIsPremultiplied); | |
| } | |
| /** | |
| * <p>Replace pixels in the bitmap with the colors in the array. Each element | |
| * in the array is a packed int prepresenting a non-premultiplied ARGB | |
| * {@link Color}.</p> | |
| * | |
| * @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, mIsPremultiplied); | |
| } | |
| 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, mDensity, 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. | |
| * | |
| * <p>The initial density of the returned bitmap is the same as the original's. | |
| * | |
| * @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"); | |
| } | |
| bm.mDensity = mDensity; | |
| return bm; | |
| } | |
| /** | |
| * Given another bitmap, return true if it has the same dimensions, config, | |
| * and pixel data as this bitmap. If any of those differ, return false. | |
| * If other is null, return false. | |
| */ | |
| public boolean sameAs(Bitmap other) { | |
| return this == other || (other != null && nativeSameAs(mNativeBitmap, other.mNativeBitmap)); | |
| } | |
| /** | |
| * Rebuilds any caches associated with the bitmap that are used for | |
| * drawing it. In the case of purgeable bitmaps, this call will attempt to | |
| * ensure that the pixels have been decoded. | |
| * If this is called on more than one bitmap in sequence, the priority is | |
| * given in LRU order (i.e. the last bitmap called will be given highest | |
| * priority). | |
| * | |
| * For bitmaps with no associated caches, this call is effectively a no-op, | |
| * and therefore is harmless. | |
| */ | |
| public void prepareToDraw() { | |
| nativePrepareToDraw(mNativeBitmap); | |
| } | |
| private static class BitmapFinalizer { | |
| private final int mNativeBitmap; | |
| BitmapFinalizer(int nativeBitmap) { | |
| mNativeBitmap = nativeBitmap; | |
| } | |
| @Override | |
| public void finalize() { | |
| try { | |
| super.finalize(); | |
| } catch (Throwable t) { | |
| // Ignore | |
| } finally { | |
| nativeDestructor(mNativeBitmap); | |
| } | |
| } | |
| } | |
| //////////// 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 boolean nativeRecycle(int nativeBitmap); | |
| private static native void nativeReconfigure(int nativeBitmap, int width, int height, | |
| int config, int allocSize); | |
| 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 nativeRowBytes(int nativeBitmap); | |
| private static native int nativeConfig(int nativeBitmap); | |
| private static native int nativeGetPixel(int nativeBitmap, int x, int y, | |
| boolean isPremultiplied); | |
| private static native void nativeGetPixels(int nativeBitmap, int[] pixels, | |
| int offset, int stride, int x, int y, | |
| int width, int height, boolean isPremultiplied); | |
| private static native void nativeSetPixel(int nativeBitmap, int x, int y, | |
| int color, boolean isPremultiplied); | |
| private static native void nativeSetPixels(int nativeBitmap, int[] colors, | |
| int offset, int stride, int x, int y, | |
| int width, int height, boolean isPremultiplied); | |
| private static native void nativeCopyPixelsToBuffer(int nativeBitmap, | |
| Buffer dst); | |
| private static native void nativeCopyPixelsFromBuffer(int nb, Buffer src); | |
| private static native int nativeGenerationId(int nativeBitmap); | |
| private static native Bitmap nativeCreateFromParcel(Parcel p); | |
| // returns true on success | |
| private static native boolean nativeWriteToParcel(int nativeBitmap, | |
| boolean isMutable, | |
| int density, | |
| 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); | |
| private static native void nativePrepareToDraw(int nativeBitmap); | |
| private static native boolean nativeHasAlpha(int nativeBitmap); | |
| private static native void nativeSetAlphaAndPremultiplied(int nBitmap, boolean hasAlpha, | |
| boolean isPremul); | |
| private static native boolean nativeHasMipMap(int nativeBitmap); | |
| private static native void nativeSetHasMipMap(int nBitmap, boolean hasMipMap); | |
| private static native boolean nativeSameAs(int nb0, int nb1); | |
| /* package */ final int ni() { | |
| return mNativeBitmap; | |
| } | |
| } |