| /* |
| * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.awt.image; |
| |
| import java.awt.Transparency; |
| import java.awt.color.ColorSpace; |
| import java.math.BigInteger; |
| |
| /** |
| * The <code>IndexColorModel</code> class is a <code>ColorModel</code> |
| * 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 <code>BigInteger</code> object. |
| * This color model is similar to an X11 PseudoColor visual. |
| * <p> |
| * 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 |
| * <code>IndexColorModel</code> objects are never pre-multiplied with |
| * the alpha components. |
| * <p> |
| * <a name="transparency"> |
| * The transparency of an <code>IndexColorModel</code> 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 <code>Transparency.OPAQUE</code> |
| * 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 <code>Transparency.BITMASK</code>. |
| * Otherwise, the value is <code>Transparency.TRANSLUCENT</code>, indicating |
| * that some valid color has an alpha component that is |
| * neither completely transparent nor completely opaque |
| * (0.0 < alpha < 1.0). |
| * </a> |
| * |
| * <p> |
| * If an <code>IndexColorModel</code> object has |
| * a transparency value of <code>Transparency.OPAQUE</code>, |
| * then the <code>hasAlpha</code> |
| * and <code>getNumComponents</code> methods |
| * (both inherited from <code>ColorModel</code>) |
| * return false and 3, respectively. |
| * For any other transparency value, |
| * <code>hasAlpha</code> returns true |
| * and <code>getNumComponents</code> returns 4. |
| * |
| * <p> |
| * <a name="index_values"> |
| * The values used to index into the colormap are taken from the least |
| * significant <em>n</em> bits of pixel representations where |
| * <em>n</em> is based on the pixel size specified in the constructor. |
| * For pixel sizes smaller than 8 bits, <em>n</em> 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, <em>n</em> is equal to the |
| * pixel size. |
| * Pixel sizes larger than 16 bits are not supported by this class. |
| * Higher order bits beyond <em>n</em> are ignored in pixel representations. |
| * Index values greater than or equal to the map size, but less than |
| * 2<sup><em>n</em></sup>, are undefined and return 0 for all color and |
| * alpha components. |
| * <p> |
| * For those methods that use a primitive array pixel representation of |
| * type <code>transferType</code>, the array length is always one. |
| * The transfer types supported are <code>DataBuffer.TYPE_BYTE</code> and |
| * <code>DataBuffer.TYPE_USHORT</code>. 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 <code>IllegalArgumentException</code> due to an invalid |
| * pixel value. |
| * <p> |
| * 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 |
| * |
| */ |
| public class IndexColorModel extends ColorModel { |
| private int rgb[]; |
| private int map_size; |
| private int pixel_mask; |
| private int transparent_index = -1; |
| private boolean allgrayopaque; |
| private BigInteger validBits; |
| |
| private sun.awt.image.BufImgSurfaceData.ICMColorData colorData = null; |
| |
| private static int[] opaqueBits = {8, 8, 8}; |
| private static int[] alphaBits = {8, 8, 8, 8}; |
| |
| static private native void initIDs(); |
| static { |
| ColorModel.loadLibraries(); |
| initIDs(); |
| } |
| /** |
| * Constructs an <code>IndexColorModel</code> from the specified |
| * arrays of red, green, and blue components. Pixels described |
| * by this color model all have alpha components of 255 |
| * unnormalized (1.0 normalized), which means they |
| * are fully opaque. All of the arrays specifying the color |
| * components must have at least the specified number of entries. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * Since there is no alpha information in any of the arguments |
| * to this constructor, the transparency value is always |
| * <code>Transparency.OPAQUE</code>. |
| * The transfer type is the smallest of <code>DataBuffer.TYPE_BYTE</code> |
| * or <code>DataBuffer.TYPE_USHORT</code> that can hold a single pixel. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param r the array of red color components |
| * @param g the array of green color components |
| * @param b the array of blue color components |
| * @throws IllegalArgumentException if <code>bits</code> is less |
| * than 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less |
| * than 1 |
| */ |
| public IndexColorModel(int bits, int size, |
| byte r[], byte g[], byte b[]) { |
| super(bits, opaqueBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| false, false, OPAQUE, |
| ColorModel.getDefaultTransferType(bits)); |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| setRGBs(size, r, g, b, null); |
| calculatePixelMask(); |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from the given arrays |
| * of red, green, and blue components. Pixels described by this color |
| * model all have alpha components of 255 unnormalized |
| * (1.0 normalized), which means they are fully opaque, except |
| * for the indicated pixel to be made transparent. All of the arrays |
| * specifying the color components must have at least the specified |
| * number of entries. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be <code>Transparency.OPAQUE</code> or |
| * <code>Transparency.BITMASK</code> depending on the arguments, as |
| * specified in the <a href="#transparency">class description</a> above. |
| * The transfer type is the smallest of <code>DataBuffer.TYPE_BYTE</code> |
| * or <code>DataBuffer.TYPE_USHORT</code> that can hold a |
| * single pixel. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param r the array of red color components |
| * @param g the array of green color components |
| * @param b the array of blue color components |
| * @param trans the index of the transparent pixel |
| * @throws IllegalArgumentException if <code>bits</code> is less than |
| * 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less than |
| * 1 |
| */ |
| public IndexColorModel(int bits, int size, |
| byte r[], byte g[], byte b[], int trans) { |
| super(bits, opaqueBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| false, false, OPAQUE, |
| ColorModel.getDefaultTransferType(bits)); |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| setRGBs(size, r, g, b, null); |
| setTransparentPixel(trans); |
| calculatePixelMask(); |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from the given |
| * arrays of red, green, blue and alpha components. All of the |
| * arrays specifying the components must have at least the specified |
| * number of entries. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be any of <code>Transparency.OPAQUE</code>, |
| * <code>Transparency.BITMASK</code>, |
| * or <code>Transparency.TRANSLUCENT</code> |
| * depending on the arguments, as specified |
| * in the <a href="#transparency">class description</a> above. |
| * The transfer type is the smallest of <code>DataBuffer.TYPE_BYTE</code> |
| * or <code>DataBuffer.TYPE_USHORT</code> that can hold a single pixel. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param r the array of red color components |
| * @param g the array of green color components |
| * @param b the array of blue color components |
| * @param a the array of alpha value components |
| * @throws IllegalArgumentException if <code>bits</code> is less |
| * than 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less |
| * than 1 |
| */ |
| public IndexColorModel(int bits, int size, |
| byte r[], byte g[], byte b[], byte a[]) { |
| super (bits, alphaBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| true, false, TRANSLUCENT, |
| ColorModel.getDefaultTransferType(bits)); |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| setRGBs (size, r, g, b, a); |
| calculatePixelMask(); |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from a single |
| * array of interleaved red, green, blue and optional alpha |
| * components. The array must have enough values in it to |
| * fill all of the needed component arrays of the specified |
| * size. The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be any of <code>Transparency.OPAQUE</code>, |
| * <code>Transparency.BITMASK</code>, |
| * or <code>Transparency.TRANSLUCENT</code> |
| * depending on the arguments, as specified |
| * in the <a href="#transparency">class description</a> above. |
| * The transfer type is the smallest of |
| * <code>DataBuffer.TYPE_BYTE</code> or <code>DataBuffer.TYPE_USHORT</code> |
| * that can hold a single pixel. |
| * |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param cmap the array of color components |
| * @param start the starting offset of the first color component |
| * @param hasalpha indicates whether alpha values are contained in |
| * the <code>cmap</code> array |
| * @throws IllegalArgumentException if <code>bits</code> is less |
| * than 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less |
| * than 1 |
| */ |
| public IndexColorModel(int bits, int size, byte cmap[], int start, |
| boolean hasalpha) { |
| this(bits, size, cmap, start, hasalpha, -1); |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from a single array of |
| * interleaved red, green, blue and optional alpha components. The |
| * specified transparent index represents a pixel that is made |
| * entirely transparent regardless of any alpha value specified |
| * for it. The array must have enough values in it to fill all |
| * of the needed component arrays of the specified size. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be any of <code>Transparency.OPAQUE</code>, |
| * <code>Transparency.BITMASK</code>, |
| * or <code>Transparency.TRANSLUCENT</code> |
| * depending on the arguments, as specified |
| * in the <a href="#transparency">class description</a> above. |
| * The transfer type is the smallest of |
| * <code>DataBuffer.TYPE_BYTE</code> or <code>DataBuffer.TYPE_USHORT</code> |
| * that can hold a single pixel. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param cmap the array of color components |
| * @param start the starting offset of the first color component |
| * @param hasalpha indicates whether alpha values are contained in |
| * the <code>cmap</code> array |
| * @param trans the index of the fully transparent pixel |
| * @throws IllegalArgumentException if <code>bits</code> is less than |
| * 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less than |
| * 1 |
| */ |
| public IndexColorModel(int bits, int size, byte cmap[], int start, |
| boolean hasalpha, int trans) { |
| // REMIND: This assumes the ordering: RGB[A] |
| super(bits, opaqueBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| false, false, OPAQUE, |
| ColorModel.getDefaultTransferType(bits)); |
| |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| if (size < 1) { |
| throw new IllegalArgumentException("Map size ("+size+ |
| ") must be >= 1"); |
| } |
| map_size = size; |
| rgb = new int[calcRealMapSize(bits, size)]; |
| int j = start; |
| int alpha = 0xff; |
| boolean allgray = true; |
| int transparency = OPAQUE; |
| for (int i = 0; i < size; i++) { |
| int r = cmap[j++] & 0xff; |
| int g = cmap[j++] & 0xff; |
| int b = cmap[j++] & 0xff; |
| allgray = allgray && (r == g) && (g == b); |
| if (hasalpha) { |
| alpha = cmap[j++] & 0xff; |
| if (alpha != 0xff) { |
| if (alpha == 0x00) { |
| if (transparency == OPAQUE) { |
| transparency = BITMASK; |
| } |
| if (transparent_index < 0) { |
| transparent_index = i; |
| } |
| } else { |
| transparency = TRANSLUCENT; |
| } |
| allgray = false; |
| } |
| } |
| rgb[i] = (alpha << 24) | (r << 16) | (g << 8) | b; |
| } |
| this.allgrayopaque = allgray; |
| setTransparency(transparency); |
| setTransparentPixel(trans); |
| calculatePixelMask(); |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from an array of |
| * ints where each int is comprised of red, green, blue, and |
| * optional alpha components in the default RGB color model format. |
| * The specified transparent index represents a pixel that is made |
| * entirely transparent regardless of any alpha value specified |
| * for it. The array must have enough values in it to fill all |
| * of the needed component arrays of the specified size. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be any of <code>Transparency.OPAQUE</code>, |
| * <code>Transparency.BITMASK</code>, |
| * or <code>Transparency.TRANSLUCENT</code> |
| * depending on the arguments, as specified |
| * in the <a href="#transparency">class description</a> above. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component arrays |
| * @param cmap the array of color components |
| * @param start the starting offset of the first color component |
| * @param hasalpha indicates whether alpha values are contained in |
| * the <code>cmap</code> array |
| * @param trans the index of the fully transparent pixel |
| * @param transferType the data type of the array used to represent |
| * pixel values. The data type must be either |
| * <code>DataBuffer.TYPE_BYTE</code> or |
| * <code>DataBuffer.TYPE_USHORT</code>. |
| * @throws IllegalArgumentException if <code>bits</code> is less |
| * than 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less |
| * than 1 |
| * @throws IllegalArgumentException if <code>transferType</code> is not |
| * one of <code>DataBuffer.TYPE_BYTE</code> or |
| * <code>DataBuffer.TYPE_USHORT</code> |
| */ |
| public IndexColorModel(int bits, int size, |
| int cmap[], int start, |
| boolean hasalpha, int trans, int transferType) { |
| // REMIND: This assumes the ordering: RGB[A] |
| super(bits, opaqueBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| false, false, OPAQUE, |
| transferType); |
| |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| if (size < 1) { |
| throw new IllegalArgumentException("Map size ("+size+ |
| ") must be >= 1"); |
| } |
| if ((transferType != DataBuffer.TYPE_BYTE) && |
| (transferType != DataBuffer.TYPE_USHORT)) { |
| throw new IllegalArgumentException("transferType must be either" + |
| "DataBuffer.TYPE_BYTE or DataBuffer.TYPE_USHORT"); |
| } |
| |
| setRGBs(size, cmap, start, hasalpha); |
| setTransparentPixel(trans); |
| calculatePixelMask(); |
| } |
| |
| /** |
| * Constructs an <code>IndexColorModel</code> from an |
| * <code>int</code> array where each <code>int</code> is |
| * comprised of red, green, blue, and alpha |
| * components in the default RGB color model format. |
| * The array must have enough values in it to fill all |
| * of the needed component arrays of the specified size. |
| * The <code>ColorSpace</code> is the default sRGB space. |
| * The transparency value may be any of <code>Transparency.OPAQUE</code>, |
| * <code>Transparency.BITMASK</code>, |
| * or <code>Transparency.TRANSLUCENT</code> |
| * depending on the arguments, as specified |
| * in the <a href="#transparency">class description</a> above. |
| * The transfer type must be one of <code>DataBuffer.TYPE_BYTE</code> |
| * <code>DataBuffer.TYPE_USHORT</code>. |
| * The <code>BigInteger</code> object specifies the valid/invalid pixels |
| * in the <code>cmap</code> array. A pixel is valid if the |
| * <code>BigInteger</code> value at that index is set, and is invalid |
| * if the <code>BigInteger</code> bit at that index is not set. |
| * @param bits the number of bits each pixel occupies |
| * @param size the size of the color component array |
| * @param cmap the array of color components |
| * @param start the starting offset of the first color component |
| * @param transferType the specified data type |
| * @param validBits a <code>BigInteger</code> object. If a bit is |
| * set in the BigInteger, the pixel at that index is valid. |
| * If a bit is not set, the pixel at that index |
| * is considered invalid. If null, all pixels are valid. |
| * Only bits from 0 to the map size are considered. |
| * @throws IllegalArgumentException if <code>bits</code> is less |
| * than 1 or greater than 16 |
| * @throws IllegalArgumentException if <code>size</code> is less |
| * than 1 |
| * @throws IllegalArgumentException if <code>transferType</code> is not |
| * one of <code>DataBuffer.TYPE_BYTE</code> or |
| * <code>DataBuffer.TYPE_USHORT</code> |
| * |
| * @since 1.3 |
| */ |
| public IndexColorModel(int bits, int size, int cmap[], int start, |
| int transferType, BigInteger validBits) { |
| super (bits, alphaBits, |
| ColorSpace.getInstance(ColorSpace.CS_sRGB), |
| true, false, TRANSLUCENT, |
| transferType); |
| |
| if (bits < 1 || bits > 16) { |
| throw new IllegalArgumentException("Number of bits must be between" |
| +" 1 and 16."); |
| } |
| if (size < 1) { |
| throw new IllegalArgumentException("Map size ("+size+ |
| ") must be >= 1"); |
| } |
| if ((transferType != DataBuffer.TYPE_BYTE) && |
| (transferType != DataBuffer.TYPE_USHORT)) { |
| throw new IllegalArgumentException("transferType must be either" + |
| "DataBuffer.TYPE_BYTE or DataBuffer.TYPE_USHORT"); |
| } |
| |
| if (validBits != null) { |
| // Check to see if it is all valid |
| for (int i=0; i < size; i++) { |
| if (!validBits.testBit(i)) { |
| this.validBits = validBits; |
| break; |
| } |
| } |
| } |
| |
| setRGBs(size, cmap, start, true); |
| calculatePixelMask(); |
| } |
| |
| private void setRGBs(int size, byte r[], byte g[], byte b[], byte a[]) { |
| if (size < 1) { |
| throw new IllegalArgumentException("Map size ("+size+ |
| ") must be >= 1"); |
| } |
| map_size = size; |
| rgb = new int[calcRealMapSize(pixel_bits, size)]; |
| int alpha = 0xff; |
| int transparency = OPAQUE; |
| boolean allgray = true; |
| for (int i = 0; i < size; i++) { |
| int rc = r[i] & 0xff; |
| int gc = g[i] & 0xff; |
| int bc = b[i] & 0xff; |
| allgray = allgray && (rc == gc) && (gc == bc); |
| if (a != null) { |
| alpha = a[i] & 0xff; |
| if (alpha != 0xff) { |
| if (alpha == 0x00) { |
| if (transparency == OPAQUE) { |
| transparency = BITMASK; |
| } |
| if (transparent_index < 0) { |
| transparent_index = i; |
| } |
| } else { |
| transparency = TRANSLUCENT; |
| } |
| allgray = false; |
| } |
| } |
| rgb[i] = (alpha << 24) | (rc << 16) | (gc << 8) | bc; |
| } |
| this.allgrayopaque = allgray; |
| setTransparency(transparency); |
| } |
| |
| private void setRGBs(int size, int cmap[], int start, boolean hasalpha) { |
| map_size = size; |
| rgb = new int[calcRealMapSize(pixel_bits, size)]; |
| int j = start; |
| int transparency = OPAQUE; |
| boolean allgray = true; |
| BigInteger validBits = this.validBits; |
| for (int i = 0; i < size; i++, j++) { |
| if (validBits != null && !validBits.testBit(i)) { |
| continue; |
| } |
| int cmaprgb = cmap[j]; |
| int r = (cmaprgb >> 16) & 0xff; |
| int g = (cmaprgb >> 8) & 0xff; |
| int b = (cmaprgb ) & 0xff; |
| allgray = allgray && (r == g) && (g == b); |
| if (hasalpha) { |
| int alpha = cmaprgb >>> 24; |
| if (alpha != 0xff) { |
| if (alpha == 0x00) { |
| if (transparency == OPAQUE) { |
| transparency = BITMASK; |
| } |
| if (transparent_index < 0) { |
| transparent_index = i; |
| } |
| } else { |
| transparency = TRANSLUCENT; |
| } |
| allgray = false; |
| } |
| } else { |
| cmaprgb |= 0xff000000; |
| } |
| rgb[i] = cmaprgb; |
| } |
| this.allgrayopaque = allgray; |
| setTransparency(transparency); |
| } |
| |
| private int calcRealMapSize(int bits, int size) { |
| int newSize = Math.max(1 << bits, size); |
| return Math.max(newSize, 256); |
| } |
| |
| private BigInteger getAllValid() { |
| int numbytes = (map_size+7)/8; |
| byte[] valid = new byte[numbytes]; |
| java.util.Arrays.fill(valid, (byte)0xff); |
| valid[0] = (byte)(0xff >>> (numbytes*8 - map_size)); |
| |
| return new BigInteger(1, valid); |
| } |
| |
| /** |
| * Returns the transparency. Returns either OPAQUE, BITMASK, |
| * or TRANSLUCENT |
| * @return the transparency of this <code>IndexColorModel</code> |
| * @see Transparency#OPAQUE |
| * @see Transparency#BITMASK |
| * @see Transparency#TRANSLUCENT |
| */ |
| public int getTransparency() { |
| return transparency; |
| } |
| |
| /** |
| * Returns an array of the number of bits for each color/alpha component. |
| * The array contains the color components in the order red, green, |
| * blue, followed by the alpha component, if present. |
| * @return an array containing the number of bits of each color |
| * and alpha component of this <code>IndexColorModel</code> |
| */ |
| public int[] getComponentSize() { |
| if (nBits == null) { |
| if (supportsAlpha) { |
| nBits = new int[4]; |
| nBits[3] = 8; |
| } |
| else { |
| nBits = new int[3]; |
| } |
| nBits[0] = nBits[1] = nBits[2] = 8; |
| } |
| return nBits.clone(); |
| } |
| |
| /** |
| * Returns the size of the color/alpha component arrays in this |
| * <code>IndexColorModel</code>. |
| * @return the size of the color and alpha component arrays. |
| */ |
| final public int getMapSize() { |
| return map_size; |
| } |
| |
| /** |
| * Returns the index of a transparent pixel in this |
| * <code>IndexColorModel</code> or -1 if there is no pixel |
| * with an alpha value of 0. If a transparent pixel was |
| * explicitly specified in one of the constructors by its |
| * index, then that index will be preferred, otherwise, |
| * the index of any pixel which happens to be fully transparent |
| * may be returned. |
| * @return the index of a transparent pixel in this |
| * <code>IndexColorModel</code> object, or -1 if there |
| * is no such pixel |
| */ |
| final public int getTransparentPixel() { |
| return transparent_index; |
| } |
| |
| /** |
| * Copies the array of red color components into the specified array. |
| * Only the initial entries of the array as specified by |
| * {@link #getMapSize() getMapSize} are written. |
| * @param r the specified array into which the elements of the |
| * array of red color components are copied |
| */ |
| final public void getReds(byte r[]) { |
| for (int i = 0; i < map_size; i++) { |
| r[i] = (byte) (rgb[i] >> 16); |
| } |
| } |
| |
| /** |
| * Copies the array of green color components into the specified array. |
| * Only the initial entries of the array as specified by |
| * <code>getMapSize</code> are written. |
| * @param g the specified array into which the elements of the |
| * array of green color components are copied |
| */ |
| final public void getGreens(byte g[]) { |
| for (int i = 0; i < map_size; i++) { |
| g[i] = (byte) (rgb[i] >> 8); |
| } |
| } |
| |
| /** |
| * Copies the array of blue color components into the specified array. |
| * Only the initial entries of the array as specified by |
| * <code>getMapSize</code> are written. |
| * @param b the specified array into which the elements of the |
| * array of blue color components are copied |
| */ |
| final public void getBlues(byte b[]) { |
| for (int i = 0; i < map_size; i++) { |
| b[i] = (byte) rgb[i]; |
| } |
| } |
| |
| /** |
| * Copies the array of alpha transparency components into the |
| * specified array. Only the initial entries of the array as specified |
| * by <code>getMapSize</code> are written. |
| * @param a the specified array into which the elements of the |
| * array of alpha components are copied |
| */ |
| final public void getAlphas(byte a[]) { |
| for (int i = 0; i < map_size; i++) { |
| a[i] = (byte) (rgb[i] >> 24); |
| } |
| } |
| |
| /** |
| * Converts data for each index from the color and alpha component |
| * arrays to an int in the default RGB ColorModel format and copies |
| * the resulting 32-bit ARGB values into the specified array. Only |
| * the initial entries of the array as specified by |
| * <code>getMapSize</code> are |
| * written. |
| * @param rgb the specified array into which the converted ARGB |
| * values from this array of color and alpha components |
| * are copied. |
| */ |
| final public void getRGBs(int rgb[]) { |
| System.arraycopy(this.rgb, 0, rgb, 0, map_size); |
| } |
| |
| private void setTransparentPixel(int trans) { |
| if (trans >= 0 && trans < map_size) { |
| rgb[trans] &= 0x00ffffff; |
| transparent_index = trans; |
| allgrayopaque = false; |
| if (this.transparency == OPAQUE) { |
| setTransparency(BITMASK); |
| } |
| } |
| } |
| |
| private void setTransparency(int transparency) { |
| if (this.transparency != transparency) { |
| this.transparency = transparency; |
| if (transparency == OPAQUE) { |
| supportsAlpha = false; |
| numComponents = 3; |
| nBits = opaqueBits; |
| } else { |
| supportsAlpha = true; |
| numComponents = 4; |
| nBits = alphaBits; |
| } |
| } |
| } |
| |
| /** |
| * This method is called from the constructors to set the pixel_mask |
| * value, which is based on the value of pixel_bits. The pixel_mask |
| * value is used to mask off the pixel parameters for methods such |
| * as getRed(), getGreen(), getBlue(), getAlpha(), and getRGB(). |
| */ |
| private final void calculatePixelMask() { |
| // Note that we adjust the mask so that our masking behavior here |
| // is consistent with that of our native rendering loops. |
| int maskbits = pixel_bits; |
| if (maskbits == 3) { |
| maskbits = 4; |
| } else if (maskbits > 4 && maskbits < 8) { |
| maskbits = 8; |
| } |
| pixel_mask = (1 << maskbits) - 1; |
| } |
| |
| /** |
| * Returns the red color component for the specified pixel, scaled |
| * from 0 to 255 in the default RGB ColorSpace, sRGB. The pixel value |
| * is specified as an int. |
| * Only the lower <em>n</em> bits of the pixel value, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * calculate the returned value. |
| * The returned value is a non pre-multiplied value. |
| * @param pixel the specified pixel |
| * @return the value of the red color component for the specified pixel |
| */ |
| final public int getRed(int pixel) { |
| return (rgb[pixel & pixel_mask] >> 16) & 0xff; |
| } |
| |
| /** |
| * Returns the green color component for the specified pixel, scaled |
| * from 0 to 255 in the default RGB ColorSpace, sRGB. The pixel value |
| * is specified as an int. |
| * Only the lower <em>n</em> bits of the pixel value, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * calculate the returned value. |
| * The returned value is a non pre-multiplied value. |
| * @param pixel the specified pixel |
| * @return the value of the green color component for the specified pixel |
| */ |
| final public int getGreen(int pixel) { |
| return (rgb[pixel & pixel_mask] >> 8) & 0xff; |
| } |
| |
| /** |
| * Returns the blue color component for the specified pixel, scaled |
| * from 0 to 255 in the default RGB ColorSpace, sRGB. The pixel value |
| * is specified as an int. |
| * Only the lower <em>n</em> bits of the pixel value, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * calculate the returned value. |
| * The returned value is a non pre-multiplied value. |
| * @param pixel the specified pixel |
| * @return the value of the blue color component for the specified pixel |
| */ |
| final public int getBlue(int pixel) { |
| return rgb[pixel & pixel_mask] & 0xff; |
| } |
| |
| /** |
| * Returns the alpha component for the specified pixel, scaled |
| * from 0 to 255. The pixel value is specified as an int. |
| * Only the lower <em>n</em> bits of the pixel value, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * calculate the returned value. |
| * @param pixel the specified pixel |
| * @return the value of the alpha component for the specified pixel |
| */ |
| final public int getAlpha(int pixel) { |
| return (rgb[pixel & pixel_mask] >> 24) & 0xff; |
| } |
| |
| /** |
| * Returns the color/alpha components of the pixel in the default |
| * RGB color model format. The pixel value is specified as an int. |
| * Only the lower <em>n</em> bits of the pixel value, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * calculate the returned value. |
| * The returned value is in a non pre-multiplied format. |
| * @param pixel the specified pixel |
| * @return the color and alpha components of the specified pixel |
| * @see ColorModel#getRGBdefault |
| */ |
| final public int getRGB(int pixel) { |
| return rgb[pixel & pixel_mask]; |
| } |
| |
| private static final int CACHESIZE = 40; |
| private int lookupcache[] = new int[CACHESIZE]; |
| |
| /** |
| * Returns a data element array representation of a pixel in this |
| * ColorModel, given an integer pixel representation in the |
| * default RGB color model. This array can then be passed to the |
| * {@link WritableRaster#setDataElements(int, int, java.lang.Object) setDataElements} |
| * method of a {@link WritableRaster} object. If the pixel variable is |
| * <code>null</code>, a new array is allocated. If <code>pixel</code> |
| * is not <code>null</code>, it must be |
| * a primitive array of type <code>transferType</code>; otherwise, a |
| * <code>ClassCastException</code> is thrown. An |
| * <code>ArrayIndexOutOfBoundsException</code> is |
| * thrown if <code>pixel</code> is not large enough to hold a pixel |
| * value for this <code>ColorModel</code>. The pixel array is returned. |
| * <p> |
| * Since <code>IndexColorModel</code> can be subclassed, subclasses |
| * inherit the implementation of this method and if they don't |
| * override it then they throw an exception if they use an |
| * unsupported <code>transferType</code>. |
| * |
| * @param rgb the integer pixel representation in the default RGB |
| * color model |
| * @param pixel the specified pixel |
| * @return an array representation of the specified pixel in this |
| * <code>IndexColorModel</code>. |
| * @throws ClassCastException if <code>pixel</code> |
| * is not a primitive array of type <code>transferType</code> |
| * @throws ArrayIndexOutOfBoundsException if |
| * <code>pixel</code> is not large enough to hold a pixel value |
| * for this <code>ColorModel</code> |
| * @throws UnsupportedOperationException if <code>transferType</code> |
| * is invalid |
| * @see WritableRaster#setDataElements |
| * @see SampleModel#setDataElements |
| */ |
| public synchronized Object getDataElements(int rgb, Object pixel) { |
| int red = (rgb>>16) & 0xff; |
| int green = (rgb>>8) & 0xff; |
| int blue = rgb & 0xff; |
| int alpha = (rgb>>>24); |
| int pix = 0; |
| |
| // Note that pixels are stored at lookupcache[2*i] |
| // and the rgb that was searched is stored at |
| // lookupcache[2*i+1]. Also, the pixel is first |
| // inverted using the unary complement operator |
| // before storing in the cache so it can never be 0. |
| for (int i = CACHESIZE - 2; i >= 0; i -= 2) { |
| if ((pix = lookupcache[i]) == 0) { |
| break; |
| } |
| if (rgb == lookupcache[i+1]) { |
| return installpixel(pixel, ~pix); |
| } |
| } |
| |
| if (allgrayopaque) { |
| // IndexColorModel objects are all tagged as |
| // non-premultiplied so ignore the alpha value |
| // of the incoming color, convert the |
| // non-premultiplied color components to a |
| // grayscale value and search for the closest |
| // gray value in the palette. Since all colors |
| // in the palette are gray, we only need compare |
| // to one of the color components for a match |
| // using a simple linear distance formula. |
| |
| int minDist = 256; |
| int d; |
| int gray = (int) (red*77 + green*150 + blue*29 + 128)/256; |
| |
| for (int i = 0; i < map_size; i++) { |
| if (this.rgb[i] == 0x0) { |
| // For allgrayopaque colormaps, entries are 0 |
| // iff they are an invalid color and should be |
| // ignored during color searches. |
| continue; |
| } |
| d = (this.rgb[i] & 0xff) - gray; |
| if (d < 0) d = -d; |
| if (d < minDist) { |
| pix = i; |
| if (d == 0) { |
| break; |
| } |
| minDist = d; |
| } |
| } |
| } else if (transparency == OPAQUE) { |
| // IndexColorModel objects are all tagged as |
| // non-premultiplied so ignore the alpha value |
| // of the incoming color and search for closest |
| // color match independently using a 3 component |
| // Euclidean distance formula. |
| // For opaque colormaps, palette entries are 0 |
| // iff they are an invalid color and should be |
| // ignored during color searches. |
| // As an optimization, exact color searches are |
| // likely to be fairly common in opaque colormaps |
| // so first we will do a quick search for an |
| // exact match. |
| |
| int smallestError = Integer.MAX_VALUE; |
| int lut[] = this.rgb; |
| int lutrgb; |
| for (int i=0; i < map_size; i++) { |
| lutrgb = lut[i]; |
| if (lutrgb == rgb && lutrgb != 0) { |
| pix = i; |
| smallestError = 0; |
| break; |
| } |
| } |
| |
| if (smallestError != 0) { |
| for (int i=0; i < map_size; i++) { |
| lutrgb = lut[i]; |
| if (lutrgb == 0) { |
| continue; |
| } |
| |
| int tmp = ((lutrgb >> 16) & 0xff) - red; |
| int currentError = tmp*tmp; |
| if (currentError < smallestError) { |
| tmp = ((lutrgb >> 8) & 0xff) - green; |
| currentError += tmp * tmp; |
| if (currentError < smallestError) { |
| tmp = (lutrgb & 0xff) - blue; |
| currentError += tmp * tmp; |
| if (currentError < smallestError) { |
| pix = i; |
| smallestError = currentError; |
| } |
| } |
| } |
| } |
| } |
| } else if (alpha == 0 && transparent_index >= 0) { |
| // Special case - transparent color maps to the |
| // specified transparent pixel, if there is one |
| |
| pix = transparent_index; |
| } else { |
| // IndexColorModel objects are all tagged as |
| // non-premultiplied so use non-premultiplied |
| // color components in the distance calculations. |
| // Look for closest match using a 4 component |
| // Euclidean distance formula. |
| |
| int smallestError = Integer.MAX_VALUE; |
| int lut[] = this.rgb; |
| for (int i=0; i < map_size; i++) { |
| int lutrgb = lut[i]; |
| if (lutrgb == rgb) { |
| if (validBits != null && !validBits.testBit(i)) { |
| continue; |
| } |
| pix = i; |
| break; |
| } |
| |
| int tmp = ((lutrgb >> 16) & 0xff) - red; |
| int currentError = tmp*tmp; |
| if (currentError < smallestError) { |
| tmp = ((lutrgb >> 8) & 0xff) - green; |
| currentError += tmp * tmp; |
| if (currentError < smallestError) { |
| tmp = (lutrgb & 0xff) - blue; |
| currentError += tmp * tmp; |
| if (currentError < smallestError) { |
| tmp = (lutrgb >>> 24) - alpha; |
| currentError += tmp * tmp; |
| if (currentError < smallestError && |
| (validBits == null || validBits.testBit(i))) |
| { |
| pix = i; |
| smallestError = currentError; |
| } |
| } |
| } |
| } |
| } |
| } |
| System.arraycopy(lookupcache, 2, lookupcache, 0, CACHESIZE - 2); |
| lookupcache[CACHESIZE - 1] = rgb; |
| lookupcache[CACHESIZE - 2] = ~pix; |
| return installpixel(pixel, pix); |
| } |
| |
| private Object installpixel(Object pixel, int pix) { |
| switch (transferType) { |
| case DataBuffer.TYPE_INT: |
| int[] intObj; |
| if (pixel == null) { |
| pixel = intObj = new int[1]; |
| } else { |
| intObj = (int[]) pixel; |
| } |
| intObj[0] = pix; |
| break; |
| case DataBuffer.TYPE_BYTE: |
| byte[] byteObj; |
| if (pixel == null) { |
| pixel = byteObj = new byte[1]; |
| } else { |
| byteObj = (byte[]) pixel; |
| } |
| byteObj[0] = (byte) pix; |
| break; |
| case DataBuffer.TYPE_USHORT: |
| short[] shortObj; |
| if (pixel == null) { |
| pixel = shortObj = new short[1]; |
| } else { |
| shortObj = (short[]) pixel; |
| } |
| shortObj[0] = (short) pix; |
| break; |
| default: |
| throw new UnsupportedOperationException("This method has not been "+ |
| "implemented for transferType " + transferType); |
| } |
| return pixel; |
| } |
| |
| /** |
| * Returns an array of unnormalized color/alpha components for a |
| * specified pixel in this <code>ColorModel</code>. The pixel value |
| * is specified as an int. If the <code>components</code> array is <code>null</code>, |
| * a new array is allocated that contains |
| * <code>offset + getNumComponents()</code> elements. |
| * The <code>components</code> array is returned, |
| * with the alpha component included |
| * only if <code>hasAlpha</code> returns true. |
| * Color/alpha components are stored in the <code>components</code> array starting |
| * at <code>offset</code> even if the array is allocated by this method. |
| * An <code>ArrayIndexOutOfBoundsException</code> |
| * is thrown if the <code>components</code> array is not <code>null</code> and is |
| * not large enough to hold all the color and alpha components |
| * starting at <code>offset</code>. |
| * @param pixel the specified pixel |
| * @param components the array to receive the color and alpha |
| * components of the specified pixel |
| * @param offset the offset into the <code>components</code> array at |
| * which to start storing the color and alpha components |
| * @return an array containing the color and alpha components of the |
| * specified pixel starting at the specified offset. |
| * @see ColorModel#hasAlpha |
| * @see ColorModel#getNumComponents |
| */ |
| public int[] getComponents(int pixel, int[] components, int offset) { |
| if (components == null) { |
| components = new int[offset+numComponents]; |
| } |
| |
| // REMIND: Needs to change if different color space |
| components[offset+0] = getRed(pixel); |
| components[offset+1] = getGreen(pixel); |
| components[offset+2] = getBlue(pixel); |
| if (supportsAlpha && (components.length-offset) > 3) { |
| components[offset+3] = getAlpha(pixel); |
| } |
| |
| return components; |
| } |
| |
| /** |
| * Returns an array of unnormalized color/alpha components for |
| * a specified pixel in this <code>ColorModel</code>. The pixel |
| * value is specified by an array of data elements of type |
| * <code>transferType</code> passed in as an object reference. |
| * If <code>pixel</code> is not a primitive array of type |
| * <code>transferType</code>, a <code>ClassCastException</code> |
| * is thrown. An <code>ArrayIndexOutOfBoundsException</code> |
| * is thrown if <code>pixel</code> is not large enough to hold |
| * a pixel value for this <code>ColorModel</code>. If the |
| * <code>components</code> array is <code>null</code>, a new array |
| * is allocated that contains |
| * <code>offset + getNumComponents()</code> elements. |
| * The <code>components</code> array is returned, |
| * with the alpha component included |
| * only if <code>hasAlpha</code> returns true. |
| * Color/alpha components are stored in the <code>components</code> |
| * array starting at <code>offset</code> even if the array is |
| * allocated by this method. An |
| * <code>ArrayIndexOutOfBoundsException</code> is also |
| * thrown if the <code>components</code> array is not |
| * <code>null</code> and is not large enough to hold all the color |
| * and alpha components starting at <code>offset</code>. |
| * <p> |
| * Since <code>IndexColorModel</code> can be subclassed, subclasses |
| * inherit the implementation of this method and if they don't |
| * override it then they throw an exception if they use an |
| * unsupported <code>transferType</code>. |
| * |
| * @param pixel the specified pixel |
| * @param components an array that receives the color and alpha |
| * components of the specified pixel |
| * @param offset the index into the <code>components</code> array at |
| * which to begin storing the color and alpha components of the |
| * specified pixel |
| * @return an array containing the color and alpha components of the |
| * specified pixel starting at the specified offset. |
| * @throws ArrayIndexOutOfBoundsException if <code>pixel</code> |
| * is not large enough to hold a pixel value for this |
| * <code>ColorModel</code> or if the |
| * <code>components</code> array is not <code>null</code> |
| * and is not large enough to hold all the color |
| * and alpha components starting at <code>offset</code> |
| * @throws ClassCastException if <code>pixel</code> is not a |
| * primitive array of type <code>transferType</code> |
| * @throws UnsupportedOperationException if <code>transferType</code> |
| * is not one of the supported transer types |
| * @see ColorModel#hasAlpha |
| * @see ColorModel#getNumComponents |
| */ |
| public int[] getComponents(Object pixel, int[] components, int offset) { |
| int intpixel; |
| switch (transferType) { |
| case DataBuffer.TYPE_BYTE: |
| byte bdata[] = (byte[])pixel; |
| intpixel = bdata[0] & 0xff; |
| break; |
| case DataBuffer.TYPE_USHORT: |
| short sdata[] = (short[])pixel; |
| intpixel = sdata[0] & 0xffff; |
| break; |
| case DataBuffer.TYPE_INT: |
| int idata[] = (int[])pixel; |
| intpixel = idata[0]; |
| break; |
| default: |
| throw new UnsupportedOperationException("This method has not been "+ |
| "implemented for transferType " + transferType); |
| } |
| return getComponents(intpixel, components, offset); |
| } |
| |
| /** |
| * Returns a pixel value represented as an int in this |
| * <code>ColorModel</code> given an array of unnormalized |
| * color/alpha components. An |
| * <code>ArrayIndexOutOfBoundsException</code> |
| * is thrown if the <code>components</code> array is not large |
| * enough to hold all of the color and alpha components starting |
| * at <code>offset</code>. Since |
| * <code>ColorModel</code> can be subclassed, subclasses inherit the |
| * implementation of this method and if they don't override it then |
| * they throw an exception if they use an unsupported transferType. |
| * @param components an array of unnormalized color and alpha |
| * components |
| * @param offset the index into <code>components</code> at which to |
| * begin retrieving the color and alpha components |
| * @return an <code>int</code> pixel value in this |
| * <code>ColorModel</code> corresponding to the specified components. |
| * @throws ArrayIndexOutOfBoundsException if |
| * the <code>components</code> array is not large enough to |
| * hold all of the color and alpha components starting at |
| * <code>offset</code> |
| * @throws UnsupportedOperationException if <code>transferType</code> |
| * is invalid |
| */ |
| public int getDataElement(int[] components, int offset) { |
| int rgb = (components[offset+0]<<16) |
| | (components[offset+1]<<8) | (components[offset+2]); |
| if (supportsAlpha) { |
| rgb |= (components[offset+3]<<24); |
| } |
| else { |
| rgb |= 0xff000000; |
| } |
| Object inData = getDataElements(rgb, null); |
| int pixel; |
| switch (transferType) { |
| case DataBuffer.TYPE_BYTE: |
| byte bdata[] = (byte[])inData; |
| pixel = bdata[0] & 0xff; |
| break; |
| case DataBuffer.TYPE_USHORT: |
| short sdata[] = (short[])inData; |
| pixel = sdata[0]; |
| break; |
| case DataBuffer.TYPE_INT: |
| int idata[] = (int[])inData; |
| pixel = idata[0]; |
| break; |
| default: |
| throw new UnsupportedOperationException("This method has not been "+ |
| "implemented for transferType " + transferType); |
| } |
| return pixel; |
| } |
| |
| /** |
| * Returns a data element array representation of a pixel in this |
| * <code>ColorModel</code> given an array of unnormalized color/alpha |
| * components. This array can then be passed to the |
| * <code>setDataElements</code> method of a <code>WritableRaster</code> |
| * object. An <code>ArrayIndexOutOfBoundsException</code> is |
| * thrown if the |
| * <code>components</code> array is not large enough to hold all of the |
| * color and alpha components starting at <code>offset</code>. |
| * If the pixel variable is <code>null</code>, a new array |
| * is allocated. If <code>pixel</code> is not <code>null</code>, |
| * it must be a primitive array of type <code>transferType</code>; |
| * otherwise, a <code>ClassCastException</code> is thrown. |
| * An <code>ArrayIndexOutOfBoundsException</code> is thrown if pixel |
| * is not large enough to hold a pixel value for this |
| * <code>ColorModel</code>. |
| * <p> |
| * Since <code>IndexColorModel</code> can be subclassed, subclasses |
| * inherit the implementation of this method and if they don't |
| * override it then they throw an exception if they use an |
| * unsupported <code>transferType</code> |
| * |
| * @param components an array of unnormalized color and alpha |
| * components |
| * @param offset the index into <code>components</code> at which to |
| * begin retrieving color and alpha components |
| * @param pixel the <code>Object</code> representing an array of color |
| * and alpha components |
| * @return an <code>Object</code> representing an array of color and |
| * alpha components. |
| * @throws ClassCastException if <code>pixel</code> |
| * is not a primitive array of type <code>transferType</code> |
| * @throws ArrayIndexOutOfBoundsException if |
| * <code>pixel</code> is not large enough to hold a pixel value |
| * for this <code>ColorModel</code> or the <code>components</code> |
| * array is not large enough to hold all of the color and alpha |
| * components starting at <code>offset</code> |
| * @throws UnsupportedOperationException if <code>transferType</code> |
| * is not one of the supported transer types |
| * @see WritableRaster#setDataElements |
| * @see SampleModel#setDataElements |
| */ |
| public Object getDataElements(int[] components, int offset, Object pixel) { |
| int rgb = (components[offset+0]<<16) | (components[offset+1]<<8) |
| | (components[offset+2]); |
| if (supportsAlpha) { |
| rgb |= (components[offset+3]<<24); |
| } |
| else { |
| rgb &= 0xff000000; |
| } |
| return getDataElements(rgb, pixel); |
| } |
| |
| /** |
| * Creates a <code>WritableRaster</code> with the specified width |
| * and height that has a data layout (<code>SampleModel</code>) |
| * compatible with this <code>ColorModel</code>. This method |
| * only works for color models with 16 or fewer bits per pixel. |
| * <p> |
| * Since <code>IndexColorModel</code> can be subclassed, any |
| * subclass that supports greater than 16 bits per pixel must |
| * override this method. |
| * |
| * @param w the width to apply to the new <code>WritableRaster</code> |
| * @param h the height to apply to the new <code>WritableRaster</code> |
| * @return a <code>WritableRaster</code> object with the specified |
| * width and height. |
| * @throws UnsupportedOperationException if the number of bits in a |
| * pixel is greater than 16 |
| * @see WritableRaster |
| * @see SampleModel |
| */ |
| public WritableRaster createCompatibleWritableRaster(int w, int h) { |
| WritableRaster raster; |
| |
| if (pixel_bits == 1 || pixel_bits == 2 || pixel_bits == 4) { |
| // TYPE_BINARY |
| raster = Raster.createPackedRaster(DataBuffer.TYPE_BYTE, |
| w, h, 1, pixel_bits, null); |
| } |
| else if (pixel_bits <= 8) { |
| raster = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, |
| w,h,1,null); |
| } |
| else if (pixel_bits <= 16) { |
| raster = Raster.createInterleavedRaster(DataBuffer.TYPE_USHORT, |
| w,h,1,null); |
| } |
| else { |
| throw new |
| UnsupportedOperationException("This method is not supported "+ |
| " for pixel bits > 16."); |
| } |
| return raster; |
| } |
| |
| /** |
| * Returns <code>true</code> if <code>raster</code> is compatible |
| * with this <code>ColorModel</code> or <code>false</code> if it |
| * is not compatible with this <code>ColorModel</code>. |
| * @param raster the {@link Raster} object to test for compatibility |
| * @return <code>true</code> if <code>raster</code> is compatible |
| * with this <code>ColorModel</code>; <code>false</code> otherwise. |
| * |
| */ |
| public boolean isCompatibleRaster(Raster raster) { |
| |
| int size = raster.getSampleModel().getSampleSize(0); |
| return ((raster.getTransferType() == transferType) && |
| (raster.getNumBands() == 1) && ((1 << size) >= map_size)); |
| } |
| |
| /** |
| * Creates a <code>SampleModel</code> with the specified |
| * width and height that has a data layout compatible with |
| * this <code>ColorModel</code>. |
| * @param w the width to apply to the new <code>SampleModel</code> |
| * @param h the height to apply to the new <code>SampleModel</code> |
| * @return a <code>SampleModel</code> object with the specified |
| * width and height. |
| * @throws IllegalArgumentException if <code>w</code> or |
| * <code>h</code> is not greater than 0 |
| * @see SampleModel |
| */ |
| public SampleModel createCompatibleSampleModel(int w, int h) { |
| int[] off = new int[1]; |
| off[0] = 0; |
| if (pixel_bits == 1 || pixel_bits == 2 || pixel_bits == 4) { |
| return new MultiPixelPackedSampleModel(transferType, w, h, |
| pixel_bits); |
| } |
| else { |
| return new ComponentSampleModel(transferType, w, h, 1, w, |
| off); |
| } |
| } |
| |
| /** |
| * Checks if the specified <code>SampleModel</code> is compatible |
| * with this <code>ColorModel</code>. If <code>sm</code> is |
| * <code>null</code>, this method returns <code>false</code>. |
| * @param sm the specified <code>SampleModel</code>, |
| * or <code>null</code> |
| * @return <code>true</code> if the specified <code>SampleModel</code> |
| * is compatible with this <code>ColorModel</code>; <code>false</code> |
| * otherwise. |
| * @see SampleModel |
| */ |
| public boolean isCompatibleSampleModel(SampleModel sm) { |
| // fix 4238629 |
| if (! (sm instanceof ComponentSampleModel) && |
| ! (sm instanceof MultiPixelPackedSampleModel) ) { |
| return false; |
| } |
| |
| // Transfer type must be the same |
| if (sm.getTransferType() != transferType) { |
| return false; |
| } |
| |
| if (sm.getNumBands() != 1) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Returns a new <code>BufferedImage</code> of TYPE_INT_ARGB or |
| * TYPE_INT_RGB that has a <code>Raster</code> with pixel data |
| * computed by expanding the indices in the source <code>Raster</code> |
| * using the color/alpha component arrays of this <code>ColorModel</code>. |
| * Only the lower <em>n</em> bits of each index value in the source |
| * <code>Raster</code>, as specified in the |
| * <a href="#index_values">class description</a> above, are used to |
| * compute the color/alpha values in the returned image. |
| * If <code>forceARGB</code> is <code>true</code>, a TYPE_INT_ARGB image is |
| * returned regardless of whether or not this <code>ColorModel</code> |
| * has an alpha component array or a transparent pixel. |
| * @param raster the specified <code>Raster</code> |
| * @param forceARGB if <code>true</code>, the returned |
| * <code>BufferedImage</code> is TYPE_INT_ARGB; otherwise it is |
| * TYPE_INT_RGB |
| * @return a <code>BufferedImage</code> created with the specified |
| * <code>Raster</code> |
| * @throws IllegalArgumentException if the raster argument is not |
| * compatible with this IndexColorModel |
| */ |
| public BufferedImage convertToIntDiscrete(Raster raster, |
| boolean forceARGB) { |
| ColorModel cm; |
| |
| if (!isCompatibleRaster(raster)) { |
| throw new IllegalArgumentException("This raster is not compatible" + |
| "with this IndexColorModel."); |
| } |
| if (forceARGB || transparency == TRANSLUCENT) { |
| cm = ColorModel.getRGBdefault(); |
| } |
| else if (transparency == BITMASK) { |
| cm = new DirectColorModel(25, 0xff0000, 0x00ff00, 0x0000ff, |
| 0x1000000); |
| } |
| else { |
| cm = new DirectColorModel(24, 0xff0000, 0x00ff00, 0x0000ff); |
| } |
| |
| int w = raster.getWidth(); |
| int h = raster.getHeight(); |
| WritableRaster discreteRaster = |
| cm.createCompatibleWritableRaster(w, h); |
| Object obj = null; |
| int[] data = null; |
| |
| int rX = raster.getMinX(); |
| int rY = raster.getMinY(); |
| |
| for (int y=0; y < h; y++, rY++) { |
| obj = raster.getDataElements(rX, rY, w, 1, obj); |
| if (obj instanceof int[]) { |
| data = (int[])obj; |
| } else { |
| data = DataBuffer.toIntArray(obj); |
| } |
| for (int x=0; x < w; x++) { |
| data[x] = rgb[data[x] & pixel_mask]; |
| } |
| discreteRaster.setDataElements(0, y, w, 1, data); |
| } |
| |
| return new BufferedImage(cm, discreteRaster, false, null); |
| } |
| |
| /** |
| * Returns whether or not the pixel is valid. |
| * @param pixel the specified pixel value |
| * @return <code>true</code> if <code>pixel</code> |
| * is valid; <code>false</code> otherwise. |
| * @since 1.3 |
| */ |
| public boolean isValid(int pixel) { |
| return ((pixel >= 0 && pixel < map_size) && |
| (validBits == null || validBits.testBit(pixel))); |
| } |
| |
| /** |
| * Returns whether or not all of the pixels are valid. |
| * @return <code>true</code> if all pixels are valid; |
| * <code>false</code> otherwise. |
| * @since 1.3 |
| */ |
| public boolean isValid() { |
| return (validBits == null); |
| } |
| |
| /** |
| * Returns a <code>BigInteger</code> that indicates the valid/invalid |
| * pixels in the colormap. A bit is valid if the |
| * <code>BigInteger</code> value at that index is set, and is invalid |
| * if the <code>BigInteger</code> value at that index is not set. |
| * The only valid ranges to query in the <code>BigInteger</code> are |
| * between 0 and the map size. |
| * @return a <code>BigInteger</code> indicating the valid/invalid pixels. |
| * @since 1.3 |
| */ |
| public BigInteger getValidPixels() { |
| if (validBits == null) { |
| return getAllValid(); |
| } |
| else { |
| return validBits; |
| } |
| } |
| |
| /** |
| * Disposes of system resources associated with this |
| * <code>ColorModel</code> once this <code>ColorModel</code> is no |
| * longer referenced. |
| */ |
| public void finalize() { |
| } |
| |
| /** |
| * Returns the <code>String</code> representation of the contents of |
| * this <code>ColorModel</code>object. |
| * @return a <code>String</code> representing the contents of this |
| * <code>ColorModel</code> object. |
| */ |
| public String toString() { |
| return new String("IndexColorModel: #pixelBits = "+pixel_bits |
| + " numComponents = "+numComponents |
| + " color space = "+colorSpace |
| + " transparency = "+transparency |
| + " transIndex = "+transparent_index |
| + " has alpha = "+supportsAlpha |
| + " isAlphaPre = "+isAlphaPremultiplied |
| ); |
| } |
| } |
