public WritableRaster copyData()

in src/main/java/org/apache/xmlgraphics/image/rendered/Any2sRGBRed.java [182:326]
111 lines of code
17 McCabe index (conditional complexity)

    public WritableRaster copyData(WritableRaster wr) {

        // Get my source.
        CachableRed src   = (CachableRed)getSources().get(0);
        ColorModel  srcCM = src.getColorModel();
        SampleModel srcSM = src.getSampleModel();


        // Fast case, Linear SRGB source, INT Pack writable raster...
        if (srcIsLsRGB
            && is_INT_PACK_COMP(wr.getSampleModel())) {
            src.copyData(wr);
            if (srcCM.hasAlpha()) {
                GraphicsUtil.coerceData(wr, srcCM, false);
            }
            applyLut_INT(wr, linearToSRGBLut);
            return wr;
        }

        if (srcCM == null) {
            // We don't really know much about this source, let's
            // guess based on the number of bands...

            float [][] matrix = null;
            switch (srcSM.getNumBands()) {
            case 1:
                matrix = new float[3][1];
                matrix[0][0] = 1; // Red
                matrix[1][0] = 1; // Grn
                matrix[2][0] = 1; // Blu
                break;
            case 2:
                matrix = new float[4][2];
                matrix[0][0] = 1; // Red
                matrix[1][0] = 1; // Grn
                matrix[3][0] = 1; // Blu
                matrix[3][1] = 1; // Alpha
                break;
            case 3:
                matrix = new float[3][3];
                matrix[0][0] = 1; // Red
                matrix[1][1] = 1; // Grn
                matrix[2][2] = 1; // Blu
                break;
            default:
                matrix = new float[4][srcSM.getNumBands()];
                matrix[0][0] = 1; // Red
                matrix[1][1] = 1; // Grn
                matrix[2][2] = 1; // Blu
                matrix[3][3] = 1; // Alpha
                break;
            }
            Raster srcRas = src.getData(wr.getBounds());
            BandCombineOp op = new BandCombineOp(matrix, null);
            op.filter(srcRas, wr);
            return wr;
        }

        if (srcCM.getColorSpace()
            == ColorSpace.getInstance(ColorSpace.CS_GRAY)) {

            // This is a little bit of a hack.  There is only
            // a linear grayscale ICC profile in the JDK so
            // many things use this when the data _really_
            // has sRGB gamma applied.
            try {
            float [][] matrix = null;
            switch (srcSM.getNumBands()) {
            case 1:
                matrix = new float[3][1];
                matrix[0][0] = 1; // Red
                matrix[1][0] = 1; // Grn
                matrix[2][0] = 1; // Blu
                break;
            case 2:
            default:
                matrix = new float[4][2];
                matrix[0][0] = 1; // Red
                matrix[1][0] = 1; // Grn
                matrix[3][0] = 1; // Blu
                matrix[4][1] = 1; // Alpha
                break;
            }
            Raster srcRas = src.getData(wr.getBounds());
            BandCombineOp op = new BandCombineOp(matrix, null);
            op.filter(srcRas, wr);
            } catch (Throwable t) {
                t.printStackTrace();
            }
            return wr;
        }

        ColorModel dstCM = getColorModel();
        if (srcCM.getColorSpace() == dstCM.getColorSpace()) {
            // No transform needed, just reformat data...
            // System.out.println("Bypassing");

            if (is_INT_PACK_COMP(srcSM)) {
                src.copyData(wr);
            } else {
                GraphicsUtil.copyData(src.getData(wr.getBounds()), wr);
            }

            return wr;
        }

        Raster srcRas = src.getData(wr.getBounds());
        assert srcRas instanceof WritableRaster;
        WritableRaster srcWr  = (WritableRaster)srcRas;

        // Divide out alpha if we have it.  We need to do this since
        // the color convert may not be a linear operation which may
        // lead to out of range values.
        ColorModel srcBICM = srcCM;
        if (srcCM.hasAlpha()) {
            srcBICM = GraphicsUtil.coerceData(srcWr, srcCM, false);
        }

        BufferedImage srcBI;
        BufferedImage dstBI;
        srcBI = new BufferedImage(srcBICM,
                                  srcWr.createWritableTranslatedChild(0, 0),
                                  false,
                                  null);

        // System.out.println("src: " + srcBI.getWidth() + "x" +
        //                    srcBI.getHeight());

        ColorConvertOp op = new ColorConvertOp(dstCM.getColorSpace(),
                                               null);
        dstBI = op.filter(srcBI, null);

        // System.out.println("After filter:");

        WritableRaster wr00 = wr.createWritableTranslatedChild(0, 0);
        for (int i = 0; i < dstCM.getColorSpace().getNumComponents(); i++) {
            copyBand(dstBI.getRaster(), i, wr00,    i);
        }

        if (dstCM.hasAlpha()) {
            copyBand(srcWr, srcSM.getNumBands() - 1,
                     wr,    getSampleModel().getNumBands() - 1);
        }
        return wr;
    }