public void writeImage()

in src/main/java/org/apache/commons/imaging/formats/xbm/XbmImageParser.java [343:416]
66 lines of code
11 McCabe index (conditional complexity)

    public void writeImage(BufferedImage src, OutputStream os, Map params)
            throws ImageWriteException, IOException
    {
        // make copy of params; we'll clear keys as we consume them.
        params = (params == null) ? new HashMap() : new HashMap(params);

        // clear format key.
        if (params.containsKey(PARAM_KEY_FORMAT))
            params.remove(PARAM_KEY_FORMAT);

        if (params.size() > 0)
        {
            Object firstKey = params.keySet().iterator().next();
            throw new ImageWriteException("Unknown parameter: " + firstKey);
        }

        String name = randomName();

        os.write(("#define " + name + "_width " + src.getWidth() + "\n").getBytes("US-ASCII"));
        os.write(("#define " + name + "_height " + src.getHeight() + "\n").getBytes("US-ASCII"));
        os.write(("static unsigned char " + name + "_bits[] = {").getBytes("US-ASCII"));

        int bitcache = 0;
        int bits_in_cache = 0;
        String separator = "\n  ";
        int written = 0;
        for (int y = 0; y < src.getHeight(); y++)
        {
            for (int x = 0; x < src.getWidth(); x++)
            {
                int argb = src.getRGB(x, y);
                int red = 0xff & (argb >> 16);
                int green = 0xff & (argb >> 8);
                int blue = 0xff & (argb >> 0);
                int sample = (red + green + blue) / 3;
                if (sample > 127)
                    sample = 0;
                else
                    sample = 1;
                bitcache |= (sample << bits_in_cache);
                ++bits_in_cache;
                if (bits_in_cache == 8)
                {
                    os.write(separator.getBytes("US-ASCII"));
                    separator = ",";
                    if (written == 12)
                    {
                        os.write("\n  ".getBytes("US-ASCII"));
                        written = 0;
                    }
                    os.write(toPrettyHex(bitcache).getBytes("US-ASCII"));
                    bitcache = 0;
                    bits_in_cache = 0;
                    ++written;
                }
            }
            if (bits_in_cache != 0)
            {
                os.write(separator.getBytes("US-ASCII"));
                separator = ",";
                if (written == 12)
                {
                    os.write("\n  ".getBytes("US-ASCII"));
                    written = 0;
                }
                os.write(toPrettyHex(bitcache).getBytes("US-ASCII"));
                bitcache = 0;
                bits_in_cache = 0;
                ++written;
            }
        }

        os.write("\n};\n".getBytes("US-ASCII"));
    }