SourceData.java 文件源码

private Bitmap getBitmap(Rect cropRect, int scaleFactor) {
    if(isRotated()) {
        //noinspection SuspiciousNameCombination
        cropRect = new Rect(cropRect.top, cropRect.left, cropRect.bottom, cropRect.right);
    }

    // TODO: there should be a way to do this without JPEG compression / decompression cycle.
    YuvImage img = new YuvImage(data, imageFormat, dataWidth, dataHeight, null);
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    img.compressToJpeg(cropRect, 90, buffer);
    byte[] jpegData = buffer.toByteArray();

    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = scaleFactor;
    Bitmap bitmap = BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, options);

    // Rotate if required
    if (rotation != 0) {
        Matrix imageMatrix = new Matrix();
        imageMatrix.postRotate(rotation);
        bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), imageMatrix, false);
    }

    return bitmap;
}