Esempio n. 1
0
  /**
   * Creates a bitmap from encoded JPEG bytes. Supports a partial JPEG image.
   *
   * @param encodedImage the encoded image with reference to the encoded bytes
   * @param bitmapConfig the {@link android.graphics.Bitmap.Config} used to create the decoded
   *     Bitmap
   * @param length the number of encoded bytes in the buffer
   * @return the bitmap
   * @exception java.lang.OutOfMemoryError if the Bitmap cannot be allocated
   */
  @Override
  public CloseableReference<Bitmap> decodeJPEGFromEncodedImage(
      EncodedImage encodedImage, Bitmap.Config bitmapConfig, int length) {
    boolean isJpegComplete = encodedImage.isCompleteAt(length);
    final BitmapFactory.Options options = getDecodeOptionsForStream(encodedImage, bitmapConfig);

    InputStream jpegDataStream = encodedImage.getInputStream();
    // At this point the InputStream from the encoded image should not be null since in the
    // pipeline,this comes from a call stack where this was checked before. Also this method needs
    // the InputStream to decode the image so this can't be null.
    Preconditions.checkNotNull(jpegDataStream);
    if (encodedImage.getSize() > length) {
      jpegDataStream = new LimitedInputStream(jpegDataStream, length);
    }
    if (!isJpegComplete) {
      jpegDataStream = new TailAppendingInputStream(jpegDataStream, EOI_TAIL);
    }
    boolean retryOnFail = options.inPreferredConfig != Bitmap.Config.ARGB_8888;
    try {
      return decodeStaticImageFromStream(jpegDataStream, options);
    } catch (RuntimeException re) {
      if (retryOnFail) {
        return decodeFromEncodedImage(encodedImage, Bitmap.Config.ARGB_8888);
      }
      throw re;
    }
  }
Esempio n. 2
0
 /**
  * Creates a bitmap from encoded bytes.
  *
  * @param encodedImage the encoded image with a reference to the encoded bytes
  * @param bitmapConfig the {@link android.graphics.Bitmap.Config} used to create the decoded
  *     Bitmap
  * @return the bitmap
  * @exception java.lang.OutOfMemoryError if the Bitmap cannot be allocated
  */
 @Override
 public CloseableReference<Bitmap> decodeFromEncodedImage(
     EncodedImage encodedImage, Bitmap.Config bitmapConfig) {
   final BitmapFactory.Options options = getDecodeOptionsForStream(encodedImage, bitmapConfig);
   boolean retryOnFail = options.inPreferredConfig != Bitmap.Config.ARGB_8888;
   try {
     return decodeStaticImageFromStream(encodedImage.getInputStream(), options);
   } catch (RuntimeException re) {
     if (retryOnFail) {
       return decodeFromEncodedImage(encodedImage, Bitmap.Config.ARGB_8888);
     }
     throw re;
   }
 }
Esempio n. 3
0
  /**
   * Options returned by this method are configured with mDecodeBuffer which is GuardedBy("this")
   */
  private static BitmapFactory.Options getDecodeOptionsForStream(
      EncodedImage encodedImage, Bitmap.Config bitmapConfig) {
    final BitmapFactory.Options options = new BitmapFactory.Options();
    // Sample size should ONLY be different than 1 when downsampling is enabled in the pipeline
    options.inSampleSize = encodedImage.getSampleSize();
    options.inJustDecodeBounds = true;
    // fill outWidth and outHeight
    BitmapFactory.decodeStream(encodedImage.getInputStream(), null, options);
    if (options.outWidth == -1 || options.outHeight == -1) {
      throw new IllegalArgumentException();
    }

    options.inJustDecodeBounds = false;
    options.inDither = true;
    options.inPreferredConfig = bitmapConfig;
    options.inMutable = true;

    return options;
  }