Examples of java.awt.image.ByteLookupTable

java.awt.image.ByteLookupTable
This class defines a lookup table object. The output of a lookup operation using an object of this class is interpreted as an unsigned byte quantity. The lookup table contains byte data arrays for one or more bands (or components) of an image, and it contains an offset which will be subtracted from the input values before indexing the arrays. This allows an array smaller than the native data size to be provided for a constrained input. If there is only one array in the lookup table, it will be applied to all bands. @see ShortLookupTable @see LookupOp @version 10 Feb 1997


        byte[] lookup = new byte[256];
        for(int i=0; i<256; i++)
            lookup[i] = (byte)(255 - i);


        LookupTable table = new ByteLookupTable(0, lookup);
        java.awt.image.LookupOp inverter = new java.awt.image.LookupOp(table, null);


        // Simply paint the image without and with the lookup filter
        g.setPaint(Color.black);
        g.drawString("Normal / Inverted", 10, 20);

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        // For what ever reason this makes the Op work correctly.
        // If you remove this, it seems to get the color channels messed
        // up.  The downside is that I suspect that this means we are
        // falling into a more general, and hence slower case, but
        // at least it works....
        operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints)
            { };
    }

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        // For what ever reason this makes the Op work correctly.
        // If you remove this, it seems to get the color channels messed
        // up.  The downside is that I suspect that this means we are
        // falling into a more general, and hence slower case, but
        // at least it works....
        operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints) 
            { };
    }

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            BufferedImage alpha = new BufferedImage(img.getWidth(), img.getHeight(), 
                    BufferedImage.TYPE_BYTE_GRAY);
            Raster raster = img.getData();
            GraphicsUtil.copyBand(raster, cm.getNumColorComponents(), alpha.getRaster(), 0);


            BufferedImageOp op1 = new LookupOp(new ByteLookupTable(0, THRESHOLD_TABLE), null);
            BufferedImage alphat = op1.filter(alpha, null);


            BufferedImage mask;
            if (true) {
                mask = new BufferedImage(targetDim.width, targetDim.height,

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            BufferedImage alpha = new BufferedImage(img.getWidth(), img.getHeight(),
                    BufferedImage.TYPE_BYTE_GRAY);
            Raster raster = img.getData();
            GraphicsUtil.copyBand(raster, cm.getNumColorComponents(), alpha.getRaster(), 0);


            BufferedImageOp op1 = new LookupOp(new ByteLookupTable(0, THRESHOLD_TABLE), null);
            BufferedImage alphat = op1.filter(alpha, null);


            BufferedImage mask;
            if (true) {
                mask = new BufferedImage(targetDim.width, targetDim.height,

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            BufferedImage alpha = new BufferedImage(img.getWidth(), img.getHeight(),
                    BufferedImage.TYPE_BYTE_GRAY);
            Raster raster = img.getData();
            GraphicsUtil.copyBand(raster, cm.getNumColorComponents(), alpha.getRaster(), 0);


            BufferedImageOp op1 = new LookupOp(new ByteLookupTable(0, THRESHOLD_TABLE), null);
            BufferedImage alphat = op1.filter(alpha, null);


            BufferedImage mask;
            if (true) {
                mask = new BufferedImage(targetDim.width, targetDim.height,

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            BufferedImage alpha = new BufferedImage(img.getWidth(), img.getHeight(), 
                    BufferedImage.TYPE_BYTE_GRAY);
            Raster raster = img.getData();
            GraphicsUtil.copyBand(raster, cm.getNumColorComponents(), alpha.getRaster(), 0);


            BufferedImageOp op1 = new LookupOp(new ByteLookupTable(0, THRESHOLD_TABLE), null);
            BufferedImage alphat = op1.filter(alpha, null);


            BufferedImage mask;
            if (true) {
                mask = new BufferedImage(targetDim.width, targetDim.height,

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        byte reverse[] = new byte[256];
        for (int j = 0; j < 200; j++) {
            reverse[j] = (byte) (256 - j);
        }


        ByteLookupTable blut = new ByteLookupTable(0, reverse);
        LookupOp lop = new LookupOp(blut, null);
        lop.filter(image, ret);


        return ret;
    }

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            if (table.getOffset() != 0) {
                // Right now the native code doesn't support offsets
                return null;
            }
            if (table instanceof ByteLookupTable) {
                ByteLookupTable bt = (ByteLookupTable) table;
                if (lookupByteRaster(src, dst, bt.getTable()) > 0) {
                    retRaster = dst;
                }
            }
            break;

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            if (table.getOffset() != 0) {
                // Right now the native code doesn't support offsets
                return null;
            }
            if (table instanceof ByteLookupTable) {
                ByteLookupTable bt = (ByteLookupTable) table;
                if (lookupByteBI(src, dst, bt.getTable()) > 0) {
                    retBI = dst;
                }
            }
            break;

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gnu.testlet.java.awt.image.ByteLookupTable.constructors

gnu.testlet.java.awt.image.ByteLookupTable.getTable

gnu.testlet.java.awt.image.ByteLookupTable.lookupPixel

gnu.testlet.java.awt.image.LookupOp.constructor

gnu.testlet.java.awt.image.LookupOp.createCompatibleDestImage

gnu.testlet.java.awt.image.LookupOp.createCompatibleDestRaster

gnu.testlet.java.awt.image.LookupOp.filterImage

gnu.testlet.java.awt.image.LookupOp.filterRaster

gnu.testlet.java.awt.image.LookupOp.getBounds2D

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