public static void copyData_INT_PACK()

in src/main/java/org/apache/xmlgraphics/image/GraphicsUtil.java [231:302]

• 59 lines of code
• 11 McCabe index (conditional complexity)

    public static void copyData_INT_PACK(Raster src, WritableRaster dst) {
        // System.out.println("Fast copyData");
        int x0 = dst.getMinX();
        if (x0 < src.getMinX()) {
            x0 = src.getMinX();
        }

        int y0 = dst.getMinY();
        if (y0 < src.getMinY()) {
            y0 = src.getMinY();
        }

        int x1 = dst.getMinX() + dst.getWidth() - 1;
        if (x1 > src.getMinX() + src.getWidth() - 1) {
            x1 = src.getMinX() + src.getWidth() - 1;
        }

        int y1 = dst.getMinY() + dst.getHeight() - 1;
        if (y1 > src.getMinY() + src.getHeight() - 1) {
            y1 = src.getMinY() + src.getHeight() - 1;
        }

        int width  = x1 - x0 + 1;
        int height = y1 - y0 + 1;

        SinglePixelPackedSampleModel srcSPPSM;
        srcSPPSM = (SinglePixelPackedSampleModel)src.getSampleModel();

        final int     srcScanStride = srcSPPSM.getScanlineStride();
        DataBufferInt srcDB         = (DataBufferInt)src.getDataBuffer();
        final int []  srcPixels     = srcDB.getBankData()[0];
        final int     srcBase =
            (srcDB.getOffset()
             + srcSPPSM.getOffset(x0 - src.getSampleModelTranslateX(),
                                y0 - src.getSampleModelTranslateY()));


        SinglePixelPackedSampleModel dstSPPSM;
        dstSPPSM = (SinglePixelPackedSampleModel)dst.getSampleModel();

        final int     dstScanStride = dstSPPSM.getScanlineStride();
        DataBufferInt dstDB         = (DataBufferInt)dst.getDataBuffer();
        final int []  dstPixels     = dstDB.getBankData()[0];
        final int     dstBase =
            (dstDB.getOffset()
             + dstSPPSM.getOffset(x0 - dst.getSampleModelTranslateX(),
                                y0 - dst.getSampleModelTranslateY()));

        if ((srcScanStride == dstScanStride)
            && (srcScanStride == width)) {
            // System.out.println("VERY Fast copyData");

            System.arraycopy(srcPixels, srcBase, dstPixels, dstBase,
                             width * height);
        } else if (width > 128) {
            int srcSP = srcBase;
            int dstSP = dstBase;
            for (int y = 0; y < height; y++) {
                System.arraycopy(srcPixels, srcSP, dstPixels, dstSP, width);
                srcSP += srcScanStride;
                dstSP += dstScanStride;
            }
        } else {
            for (int y = 0; y < height; y++) {
                int srcSP = srcBase + y * srcScanStride;
                int dstSP = dstBase + y * dstScanStride;
                for (int x = 0; x < width; x++) {
                    dstPixels[dstSP++] = srcPixels[srcSP++];
                }
            }
        }
    }