Examples of java.awt.image.BandCombineOp.filter()

java.awt.image.BandCombineOp.filter()
Transforms the Raster using the matrix specified in the constructor. An IllegalArgumentException may be thrown if the number of bands in the source or destination is incompatible with the matrix. See the class comments for more details.
If the destination is null, it will be created with a number of bands equalling the number of rows in the matrix. No exception is thrown if the operation causes a data overflow. @param src The Raster to be filtered. @param dst The Raster in which to store the results of the filter operation. @return The filtered Raster. @throws IllegalArgumentException If the number of bands in the source or destination is incompatible with the matrix.


                dstBI = new BufferedImage(cmna, dstWr, false, null);
            }


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


            // I never have to 'fix' alpha premult since I take
            // it's value from my source....
            if (dstCM.hasAlpha())
                copyBand(srcWr, sm.getNumBands()-1,

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                matrix[3][3] = 1; // Alpha
                break;
            }
            Raster srcRas = src.getData(wr.getBounds());
            BandCombineOp op = new BandCombineOp(matrix, null);
            op.filter(srcRas, wr);
        } else {
            Raster         srcRas = src.getData(wr.getBounds());
            WritableRaster srcWr  = (WritableRaster)srcRas;


            // Divide out alpha if we have it.  We need to do this since

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             * System.out.println("dst: " + dstBI.getWidth() + "x" + 
             *                    dstBI.getHeight());
             */


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


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

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                break;
            }


            Raster srcRas = src.getData(wr.getBounds());
            BandCombineOp op = new BandCombineOp(matrix, null);
            op.filter(srcRas, wr);
        } else {
            ColorModel dstCM = getColorModel();
            BufferedImage dstBI;


            if (!dstCM.hasAlpha()) {

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             * System.out.println("dst: " + dstBI.getWidth() + "x" +
             *                    dstBI.getHeight());
             */


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


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

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                matrix = new float[sm.getNumBands()][1];
                matrix[0][0] = 1;
            }


            BandCombineOp op = new BandCombineOp(matrix, null);
            op.filter(srcRas, wr);
        } else {
            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

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                dstBI = new BufferedImage(cmna, dstWr, false, null);
            }


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


            // Have to 'fix' alpha premult
            if (dstCM.hasAlpha()) {
                copyBand(srcWr, sm.getNumBands()-1,
                         wr,    getSampleModel().getNumBands()-1);

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                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)) {

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                    matrix[3][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;
        }

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        // 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++)

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