Examples of ae.java.awt.image.IndexColorModel

ae.java.awt.image.IndexColorModel
The IndexColorModel class is a ColorModel class that works with pixel values consisting of a single sample that is an index into a fixed colormap in the default sRGB color space. The colormap specifies red, green, blue, and optional alpha components corresponding to each index. All components are represented in the colormap as 8-bit unsigned integral values. Some constructors allow the caller to specify "holes" in the colormap by indicating which colormap entries are valid and which represent unusable colors via the bits set in a BigInteger object. This color model is similar to an X11 PseudoColor visual.
Some constructors provide a means to specify an alpha component for each pixel in the colormap, while others either provide no such means or, in some cases, a flag to indicate whether the colormap data contains alpha values. If no alpha is supplied to the constructor, an opaque alpha component (alpha = 1.0) is assumed for each entry. An optional transparent pixel value can be supplied that indicates a pixel to be made completely transparent, regardless of any alpha component supplied or assumed for that pixel value. Note that the color components in the colormap of an IndexColorModel objects are never pre-multiplied with the alpha components.
The transparency of an IndexColorModel object is determined by examining the alpha components of the colors in the colormap and choosing the most specific value after considering the optional alpha values and any transparent index specified. The transparency value is Transparency.OPAQUE only if all valid colors in the colormap are opaque and there is no valid transparent pixel. If all valid colors in the colormap are either completely opaque (alpha = 1.0) or completely transparent (alpha = 0.0), which typically occurs when a valid transparent pixel is specified, the value is Transparency.BITMASK. Otherwise, the value is Transparency.TRANSLUCENT, indicating that some valid color has an alpha component that is neither completely transparent nor completely opaque (0.0 < alpha < 1.0).
If an IndexColorModel object has a transparency value of Transparency.OPAQUE, then the hasAlpha and getNumComponents methods (both inherited from ColorModel) return false and 3, respectively. For any other transparency value, hasAlpha returns true and getNumComponents returns 4.
The values used to index into the colormap are taken from the least significant n bits of pixel representations where n is based on the pixel size specified in the constructor. For pixel sizes smaller than 8 bits, n is rounded up to a power of two (3 becomes 4 and 5,6,7 become 8). For pixel sizes between 8 and 16 bits, n is equal to the pixel size. Pixel sizes larger than 16 bits are not supported by this class. Higher order bits beyond n are ignored in pixel representations. Index values greater than or equal to the map size, but less than 2ⁿ, are undefined and return 0 for all color and alpha components.
For those methods that use a primitive array pixel representation of type transferType, the array length is always one. The transfer types supported are DataBuffer.TYPE_BYTE and DataBuffer.TYPE_USHORT. A single int pixel representation is valid for all objects of this class, since it is always possible to represent pixel values used with this class in a single int. Therefore, methods that use this representation do not throw an IllegalArgumentException due to an invalid pixel value.
Many of the methods in this class are final. The reason for this is that the underlying native graphics code makes assumptions about the layout and operation of this class and those assumptions are reflected in the implementations of the methods here that are marked final. You can subclass this class for other reasons, but you cannot override or modify the behaviour of those methods. @see ColorModel @see ColorSpace @see DataBuffer

        }


        if (sg.renderHint != SunHints.INTVAL_RENDER_QUALITY) {
            if (cm instanceof IndexColorModel) {
                Raster raster = bImg.getRaster();
                IndexColorModel icm = (IndexColorModel) cm;
                // Just need to make sure that we have a transparent pixel
                if (needTrans && cm.getTransparency() == cm.OPAQUE) {
                    // Fix 4221407
                    if (raster instanceof ae.sun.awt.image.BytePackedRaster) {
                        dstCM = ColorModel.getRGBdefault();
                    }
                    else {
                        double[] matrix = new double[6];
                        tx.getMatrix(matrix);
                        if (matrix[1] == 0. && matrix[2] ==0.
                            && matrix[4] == 0. && matrix[5] == 0.) {
                            // Only scaling so do not need to create
                        }
                        else {
                            int mapSize = icm.getMapSize();
                            if (mapSize < 256) {
                                int[] cmap = new int[mapSize+1];
                                icm.getRGBs(cmap);
                                cmap[mapSize] = 0x0000;
                                dstCM = new
                                    IndexColorModel(icm.getPixelSize(),
                                                    mapSize+1,
                                                    cmap, 0, true, mapSize,
                                                    DataBuffer.TYPE_BYTE);
                            }
                            else {

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                } else if (raster instanceof ShortComponentRaster &&
                           raster.getNumDataElements() == 1 &&
                           ((ShortComponentRaster)raster).getPixelStride() == 1)
                {
                    SurfaceType sType = SurfaceType.AnyShort;
                    IndexColorModel icm = null;
                    if (cm instanceof DirectColorModel) {
                        DirectColorModel dcm = (DirectColorModel) cm;
                        int aMask = dcm.getAlphaMask();
                        int rMask = dcm.getRedMask();
                        int gMask = dcm.getGreenMask();
                        int bMask = dcm.getBlueMask();
                        if (numBands == 3 &&
                            aMask == 0 &&
                            rMask == DCM_555X_RED_MASK &&
                            gMask == DCM_555X_GREEN_MASK &&
                            bMask == DCM_555X_BLUE_MASK)
                        {
                            sType = SurfaceType.Ushort555Rgbx;
                        } else
                        if (numBands == 4 &&
                            aMask == DCM_4444_ALPHA_MASK &&
                            rMask == DCM_4444_RED_MASK &&
                            gMask == DCM_4444_GREEN_MASK &&
                            bMask == DCM_4444_BLUE_MASK)
                        {
                            sType = SurfaceType.Ushort4444Argb;
                        }
                    } else if (cm instanceof IndexColorModel) {
                        icm = (IndexColorModel)cm;
                        if (icm.getPixelSize() == 12) {
                            if (isOpaqueGray(icm)) {
                                sType = SurfaceType.Index12Gray;
                            } else {
                                sType = SurfaceType.UshortIndexed;
                            }

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        ByteComponentRaster bcRaster =
            (ByteComponentRaster)bImg.getRaster();
        BufImgSurfaceData bisd =
            new BufImgSurfaceData(bcRaster.getDataBuffer(), bImg, sType);
        ColorModel cm = bImg.getColorModel();
        IndexColorModel icm = ((cm instanceof IndexColorModel)
                               ? (IndexColorModel) cm
                               : null);
        bisd.initRaster(bcRaster.getDataStorage(),
                        bcRaster.getDataOffset(primaryBank), 0,
                        bcRaster.getWidth(),

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        BytePackedRaster bpRaster =
            (BytePackedRaster)bImg.getRaster();
        BufImgSurfaceData bisd =
            new BufImgSurfaceData(bpRaster.getDataBuffer(), bImg, sType);
        ColorModel cm = bImg.getColorModel();
        IndexColorModel icm = ((cm instanceof IndexColorModel)
                               ? (IndexColorModel) cm
                               : null);
        bisd.initRaster(bpRaster.getDataStorage(),
                        bpRaster.getDataBitOffset() / 8,
                        bpRaster.getDataBitOffset() & 7,

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        return new Any(raster, cm, xform, maxw, filter);
    }


    public static boolean isFilterableICM(ColorModel cm) {
        if (cm instanceof IndexColorModel) {
            IndexColorModel icm = (IndexColorModel) cm;
            if (icm.getMapSize() <= 256) {
                return true;
            }
        }
        return false;
    }

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                // Probably need to composite anyway so force ARGB
                cmodel = ColorModel.getRGBdefault();
                srcLUT = null;
            }
            else {
                IndexColorModel icm = (IndexColorModel) model;
                numSrcLUT = icm.getMapSize();
                srcLUT = new int[Math.max(numSrcLUT, 256)];
                icm.getRGBs(srcLUT);
                srcLUTtransIndex = icm.getTransparentPixel();
                cmodel = model;
            }
        }
        else {
            if (cmodel == null) {

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            }
            if (isSameCM && (cmodel != model) && (srcLUT != null) &&
                (model instanceof IndexColorModel) &&
                (biRaster instanceof ByteComponentRaster))
            {
                IndexColorModel icm = (IndexColorModel) model;
                ByteComponentRaster bct = (ByteComponentRaster) biRaster;
                int numlut = numSrcLUT;
                if (setDiffICM(x, y, w, h, srcLUT, srcLUTtransIndex,
                               numSrcLUT, icm,
                               pix, off, scansize, bct,
                               bct.getDataOffset(0)) == 0) {
                    convertToRGB();
                }
                else {
                    // Note that setDiffICM modified the raster directly
                    // so we must mark it as changed
                    bct.markDirty();
                    if (numlut != numSrcLUT) {
                        boolean hasAlpha = icm.hasAlpha();
                        if (srcLUTtransIndex != -1) {
                            hasAlpha = true;
                        }
                        int nbits = icm.getPixelSize();
                        icm = new IndexColorModel(nbits,
                                                  numSrcLUT, srcLUT,
                                                  0, hasAlpha,
                                                  srcLUTtransIndex,
                                                  (nbits > 8
                                                   ? DataBuffer.TYPE_USHORT

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        ImageTypeSpecifier type = new ImageTypeSpecifier(image);
        return canCreatePalette(type);
    }


    protected RenderedImage getIndexedImage() {
        IndexColorModel icm = getIndexColorModel();


        BufferedImage dst =
            new BufferedImage(src.getWidth(), src.getHeight(),
                              BufferedImage.TYPE_BYTE_INDEXED, icm);

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        if (root != null) {
            findPaletteEntry(root, index, red, green, blue);
        }


        IndexColorModel icm = null;
        if (transColor  != null) {
            icm = new IndexColorModel(8, size, red, green, blue, 0);
        } else {
            icm = new IndexColorModel(8, currSize, red, green, blue);
        }
        return icm;
    }

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        }
        IHDR_bitDepth = bitDepth;


        // Initialize IHDR_colorType
        if (colorModel instanceof IndexColorModel) {
            IndexColorModel icm = (IndexColorModel)colorModel;
            int size = icm.getMapSize();


            byte[] reds = new byte[size];
            icm.getReds(reds);
            byte[] greens = new byte[size];
            icm.getGreens(greens);
            byte[] blues = new byte[size];
            icm.getBlues(blues);


            // Determine whether the color tables are actually a gray ramp
            // if the color type has not been set previously
            boolean isGray = false;
            if (!IHDR_present ||
                (IHDR_colorType != PNGImageReader.PNG_COLOR_PALETTE)) {
                isGray = true;
                int scale = 255/((1 << IHDR_bitDepth) - 1);
                for (int i = 0; i < size; i++) {
                    byte red = reds[i];
                    if ((red != (byte)(i*scale)) ||
                        (red != greens[i]) ||
                        (red != blues[i])) {
                        isGray = false;
                        break;
                    }
                }
            }


            // Determine whether transparency exists
            boolean hasAlpha = colorModel.hasAlpha();


            byte[] alpha = null;
            if (hasAlpha) {
                alpha = new byte[size];
                icm.getAlphas(alpha);
            }


            /*
             * NB: PNG_COLOR_GRAY_ALPHA color type may be not optimal for images
             * contained more than 1024 pixels (or even than 768 pixels in case of

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