public static int getType()

in modules/awt/src/main/java/common/org/apache/harmony/awt/gl/Surface.java [204:309]
105 lines of code
44 McCabe index (conditional complexity)

    public static int getType(ColorModel cm, WritableRaster raster){
        int transferType = cm.getTransferType();
        boolean hasAlpha = cm.hasAlpha();
        ColorSpace cs = cm.getColorSpace();
        int csType = cs.getType();
        SampleModel sm = raster.getSampleModel();

        if(csType == ColorSpace.TYPE_RGB){
            if(cm instanceof DirectColorModel){
                DirectColorModel dcm = (DirectColorModel) cm;
                switch (transferType) {
                case DataBuffer.TYPE_INT:
                    if (dcm.getRedMask() == RED_MASK &&
                            dcm.getGreenMask() == GREEN_MASK &&
                            dcm.getBlueMask() == BLUE_MASK) {
                        if (!hasAlpha) {
                            return BufferedImage.TYPE_INT_RGB;
                        }
                        if (dcm.getAlphaMask() == ALPHA_MASK) {
                            if (dcm.isAlphaPremultiplied()) {
                                return BufferedImage.TYPE_INT_ARGB_PRE;
                            }
                            return BufferedImage.TYPE_INT_ARGB;
                        }
                        return BufferedImage.TYPE_CUSTOM;
                    } else if (dcm.getRedMask() == RED_BGR_MASK &&
                            dcm.getGreenMask() == GREEN_BGR_MASK &&
                            dcm.getBlueMask() == BLUE_BGR_MASK) {
                        if (!hasAlpha) {
                            return BufferedImage.TYPE_INT_BGR;
                        }
                    } else {
                        return BufferedImage.TYPE_CUSTOM;
                    }
                case DataBuffer.TYPE_USHORT:
                    if (dcm.getRedMask() == RED_555_MASK &&
                            dcm.getGreenMask() == GREEN_555_MASK &&
                            dcm.getBlueMask() == BLUE_555_MASK && !hasAlpha) {
                        return BufferedImage.TYPE_USHORT_555_RGB;
                    } else if (dcm.getRedMask() == RED_565_MASK &&
                            dcm.getGreenMask() == GREEN_565_MASK &&
                            dcm.getBlueMask() == BLUE_565_MASK) {
                        return BufferedImage.TYPE_USHORT_565_RGB;
                    }
                default:
                    return BufferedImage.TYPE_CUSTOM;
                }
            }else if(cm instanceof IndexColorModel){
                IndexColorModel icm = (IndexColorModel) cm;
                int pixelBits = icm.getPixelSize();
                if(transferType == DataBuffer.TYPE_BYTE){
                    if(sm instanceof MultiPixelPackedSampleModel && !hasAlpha &&
                        pixelBits < 5){
                            return BufferedImage.TYPE_BYTE_BINARY;
                    }else if(pixelBits == 8){
                        return BufferedImage.TYPE_BYTE_INDEXED;
                    }
                }
                return BufferedImage.TYPE_CUSTOM;
            }else if(cm instanceof ComponentColorModel){
                ComponentColorModel ccm = (ComponentColorModel) cm;
                if(transferType == DataBuffer.TYPE_BYTE &&
                        sm instanceof ComponentSampleModel){
                    ComponentSampleModel csm =
                        (ComponentSampleModel) sm;
                    int[] offsets = csm.getBandOffsets();
                    int[] bits = ccm.getComponentSize();
                    boolean isCustom = false;
                    for (int i = 0; i < bits.length; i++) {
                        if (bits[i] != 8 ||
                               offsets[i] != offsets.length - 1 - i) {
                            isCustom = true;
                            break;
                        }
                    }
                    if (!isCustom) {
                        if (!ccm.hasAlpha()) {
                            return BufferedImage.TYPE_3BYTE_BGR;
                        } else if (ccm.isAlphaPremultiplied()) {
                            return BufferedImage.TYPE_4BYTE_ABGR_PRE;
                        } else {
                            return BufferedImage.TYPE_4BYTE_ABGR;
                        }
                    }
                }
                return BufferedImage.TYPE_CUSTOM;
            }
            return BufferedImage.TYPE_CUSTOM;
        }else if(cs == LUTColorConverter.LINEAR_GRAY_CS){
            if(cm instanceof ComponentColorModel &&
                    cm.getNumComponents() == 1){
                int bits[] = cm.getComponentSize();
                if(transferType == DataBuffer.TYPE_BYTE &&
                        bits[0] == 8){
                    return BufferedImage.TYPE_BYTE_GRAY;
                }else if(transferType == DataBuffer.TYPE_USHORT &&
                        bits[0] == 16){
                    return BufferedImage.TYPE_USHORT_GRAY;
                }else{
                    return BufferedImage.TYPE_CUSTOM;
                }
            }
            return BufferedImage.TYPE_CUSTOM;
        }
        return BufferedImage.TYPE_CUSTOM;
    }