private static WritableRaster buildRaster()

in src/main/java/org/apache/pdfbox/jbig2/image/Bitmaps.java [172:214]
38 lines of code
6 McCabe index (conditional complexity)

    private static WritableRaster buildRaster(final Bitmap bitmap, final FilterType filterType,
            final double scaleX, final double scaleY)
    {
        final int height = bitmap.getHeight();
        final int width = bitmap.getWidth();
        final WritableRaster raster;
        
        if (scaleX != 1 || scaleY != 1)
        {
            final Rectangle bounds = new Rectangle(0, 0, //
                    (int) Math.round(width * scaleX), //
                    (int) Math.round(height * scaleY));

            raster = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE,
                    bounds.width, bounds.height, 1, new Point());

            final Resizer resizer = new Resizer(scaleX, scaleY);
            final Filter filter = Filter.byType(filterType);
            resizer.resize(bitmap, bitmap.getBounds() /* sourceRegion */, raster, bounds, filter,
                    filter);
        }
        else
        {
            // scaling not required: clone and invert bitmap into packed raster
            // extra care is taken to ensure padding bits are set to zero
            final int bytes = width / 8;
            final int bits = (~0xff >> (width & 7)) & 0xff;
            final byte[] dst = new byte[height * bitmap.getRowStride()];
            for ( int idx = 0, row = height; row>0; row-- ) 
            {
                for ( int count = bytes; count>0; count-- ) 
                {
                    dst[idx] = (byte)~bitmap.getByte(idx++);
                }
                if ( bits!=0 )
                {
                    dst[idx] = (byte)(~bitmap.getByte(idx++) & bits);
                }
            }
            raster = Raster.createPackedRaster(new DataBufferByte(dst, dst.length), width, height, 1, new Point());
        }
        return raster;
    }