カスタムメソッド、パラメータ値の範囲外放出異常

3627 ワード

 /**
     * Compress a rectangle region in the YuvImage to a jpeg.
     * Only ImageFormat.NV21 and ImageFormat.YUY2
     * are supported for now.
     *
     * @param rectangle The rectangle region to be compressed. The medthod checks if rectangle is
     *                  inside the image. Also, the method modifies rectangle if the chroma pixels
     *                  in it are not matched with the luma pixels in it.
     * @param quality   Hint to the compressor, 0-100. 0 meaning compress for
     *                  small size, 100 meaning compress for max quality.
     * @param stream    OutputStream to write the compressed data.
     * @return          True if the compression is successful.
     * @throws IllegalArgumentException if rectangle is invalid; quality is not within [0,
     *                  100]; or stream is null.
     */
    public boolean compressToJpeg(Rect rectangle, int quality, OutputStream stream) {
        Rect wholeImage = new Rect(0, 0, mWidth, mHeight);
        if (!wholeImage.contains(rectangle)) {
            throw new IllegalArgumentException(
                    "rectangle is not inside the image");
        }

        if (quality < 0 || quality > 100) {
            throw new IllegalArgumentException("quality must be 0..100");
        }

        if (stream == null) {
            throw new IllegalArgumentException("stream cannot be null");
        }

        adjustRectangle(rectangle);
        int[] offsets = calculateOffsets(rectangle.left, rectangle.top);

        return nativeCompressToJpeg(mData, mFormat, rectangle.width(),
                rectangle.height(), offsets, mStrides, quality, stream,
                new byte[WORKING_COMPRESS_STORAGE]);
    }