protected void determineEncodedColorModel()

in src/main/java/org/apache/xmlgraphics/ps/ImageEncodingHelper.java [367:428]
50 lines of code
28 McCabe index (conditional complexity)

    protected void determineEncodedColorModel() {
        this.firstTileDump = false;
        this.encodedColorModel = DEFAULT_RGB_COLOR_MODEL;

        ColorModel cm = image.getColorModel();
        ColorSpace cs = cm.getColorSpace();

        int numComponents = cm.getNumComponents();

        if (!isMultiTile()) {
            if (numComponents == 1 && cs.getType() == ColorSpace.TYPE_GRAY) {
                if (cm.getTransferType() == DataBuffer.TYPE_BYTE) {
                    this.firstTileDump = true;
                    this.encodedColorModel = cm;
                }
            } else if (cm instanceof IndexColorModel) {
                if (cm.getTransferType() == DataBuffer.TYPE_BYTE) {
                    this.firstTileDump = true;
                    this.encodedColorModel = cm;
                }
            } else if (cm instanceof ComponentColorModel
                    && (numComponents == 3 || (enableCMYK && numComponents == 4))
                    && !cm.hasAlpha()) {
                Raster raster = image.getTile(0, 0);
                DataBuffer buffer = raster.getDataBuffer();
                SampleModel sampleModel = raster.getSampleModel();
                if (sampleModel instanceof PixelInterleavedSampleModel) {
                    PixelInterleavedSampleModel piSampleModel;
                    piSampleModel = (PixelInterleavedSampleModel)sampleModel;
                    int[] offsets = piSampleModel.getBandOffsets();
                    for (int i = 0; i < offsets.length; i++) {
                        if (offsets[i] != i && offsets[i] != offsets.length - 1 - i) {
                            //Don't encode directly as samples are not next to each other
                            //i.e. offsets are not 012 (RGB) or 0123 (CMYK)
                            // let also pass 210 BGR and 3210 (KYMC); 3210 will be skipped below
                            // if 210 (BGR) the B and R bytes will be permuted later in optimizeWriteTo()
                            return;
                        }
                    }
                    // check if we are in a BGR case; this is added here as a workaround for bug fix
                    // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6549882 that causes some PNG
                    // images to be loaded as BGR with the consequence that performance was being impacted
                    this.isBGR = false;
                    if (offsets.length == 3 && offsets[0] == 2 && offsets[1] == 1 && offsets[2] == 0) {
                        this.isBGR = true;
                    }
                    // make sure we did not get here due to a KMYC image
                    if (offsets.length == 4 && offsets[0] == 3 && offsets[1] == 2 && offsets[2] == 1
                            && offsets[3] == 0) {
                        isKMYC = true;
                    }
                }
                if (cm.getTransferType() == DataBuffer.TYPE_BYTE
                        && buffer.getOffset() == 0
                        && buffer.getNumBanks() == 1) {
                    this.firstTileDump = true;
                    this.encodedColorModel = cm;
                }
            }
        }

    }