Package com.sun.media.imageioimpl.common

Examples of com.sun.media.imageioimpl.common.LZWCompressor.compress()

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        boolean usePredictor =
            predictor == BaselineTIFFTagSet.PREDICTOR_HORIZONTAL_DIFFERENCING;

        if(bytesPerRow == scanlineStride && !usePredictor) {
            lzwCompressor.compress(b, off, bytesPerRow*height);
        } else {
            byte[] rowBuf = usePredictor ? new byte[bytesPerRow] : null;
            for(int i = 0; i < height; i++) {
                if(usePredictor) {
                    // Cannot modify b[] in place as it might be a data
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                    // array from the image being written so make a copy.
                    System.arraycopy(b, off, rowBuf, 0, bytesPerRow);
                    for(int j = bytesPerRow - 1; j >= samplesPerPixel; j--) {
                        rowBuf[j] -= rowBuf[j - samplesPerPixel];
                    }
                    lzwCompressor.compress(rowBuf, 0, bytesPerRow);
                } else {
                    lzwCompressor.compress(b, off, bytesPerRow);
                }
                off += scanlineStride;
            }
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                    for(int j = bytesPerRow - 1; j >= samplesPerPixel; j--) {
                        rowBuf[j] -= rowBuf[j - samplesPerPixel];
                    }
                    lzwCompressor.compress(rowBuf, 0, bytesPerRow);
                } else {
                    lzwCompressor.compress(b, off, bytesPerRow);
                }
                off += scanlineStride;
            }
        }
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