J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.awt.image; |
| 27 | |
| 28 | import java.awt.color.ColorSpace; |
| 29 | import java.awt.color.ICC_ColorSpace; |
| 30 | |
| 31 | /** |
| 32 | * A <CODE>ColorModel</CODE> class that works with pixel values that |
| 33 | * represent color and alpha information as separate samples and that |
| 34 | * store each sample in a separate data element. This class can be |
| 35 | * used with an arbitrary <CODE>ColorSpace</CODE>. The number of |
| 36 | * color samples in the pixel values must be same as the number of |
| 37 | * color components in the <CODE>ColorSpace</CODE>. There may be a |
| 38 | * single alpha sample. |
| 39 | * <p> |
| 40 | * For those methods that use |
| 41 | * a primitive array pixel representation of type <CODE>transferType</CODE>, |
| 42 | * the array length is the same as the number of color and alpha samples. |
| 43 | * Color samples are stored first in the array followed by the alpha |
| 44 | * sample, if present. The order of the color samples is specified |
| 45 | * by the <CODE>ColorSpace</CODE>. Typically, this order reflects the |
| 46 | * name of the color space type. For example, for <CODE>TYPE_RGB</CODE>, |
| 47 | * index 0 corresponds to red, index 1 to green, and index 2 to blue. |
| 48 | * <p> |
| 49 | * The translation from pixel sample values to color/alpha components for |
| 50 | * display or processing purposes is based on a one-to-one correspondence of |
| 51 | * samples to components. |
| 52 | * Depending on the transfer type used to create an instance of |
| 53 | * <code>ComponentColorModel</code>, the pixel sample values |
| 54 | * represented by that instance may be signed or unsigned and may |
| 55 | * be of integral type or float or double (see below for details). |
| 56 | * The translation from sample values to normalized color/alpha components |
| 57 | * must follow certain rules. For float and double samples, the translation |
| 58 | * is an identity, i.e. normalized component values are equal to the |
| 59 | * corresponding sample values. For integral samples, the translation |
| 60 | * should be only a simple scale and offset, where the scale and offset |
| 61 | * constants may be different for each component. The result of |
| 62 | * applying the scale and offset constants is a set of color/alpha |
| 63 | * component values, which are guaranteed to fall within a certain |
| 64 | * range. Typically, the range for a color component will be the range |
| 65 | * defined by the <code>getMinValue</code> and <code>getMaxValue</code> |
| 66 | * methods of the <code>ColorSpace</code> class. The range for an |
| 67 | * alpha component should be 0.0 to 1.0. |
| 68 | * <p> |
| 69 | * Instances of <code>ComponentColorModel</code> created with transfer types |
| 70 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 71 | * and <CODE>DataBuffer.TYPE_INT</CODE> have pixel sample values which |
| 72 | * are treated as unsigned integral values. |
| 73 | * The number of bits in a color or alpha sample of a pixel value might not |
| 74 | * be the same as the number of bits for the corresponding color or alpha |
| 75 | * sample passed to the |
| 76 | * <code>ComponentColorModel(ColorSpace, int[], boolean, boolean, int, int)</code> |
| 77 | * constructor. In |
| 78 | * that case, this class assumes that the least significant n bits of a sample |
| 79 | * value hold the component value, where n is the number of significant bits |
| 80 | * for the component passed to the constructor. It also assumes that |
| 81 | * any higher-order bits in a sample value are zero. Thus, sample values |
| 82 | * range from 0 to 2<sup>n</sup> - 1. This class maps these sample values |
| 83 | * to normalized color component values such that 0 maps to the value |
| 84 | * obtained from the <code>ColorSpace's</code> <code>getMinValue</code> |
| 85 | * method for each component and 2<sup>n</sup> - 1 maps to the value |
| 86 | * obtained from <code>getMaxValue</code>. To create a |
| 87 | * <code>ComponentColorModel</code> with a different color sample mapping |
| 88 | * requires subclassing this class and overriding the |
| 89 | * <code>getNormalizedComponents(Object, float[], int)</code> method. |
| 90 | * The mapping for an alpha sample always maps 0 to 0.0 and |
| 91 | * 2<sup>n</sup> - 1 to 1.0. |
| 92 | * <p> |
| 93 | * For instances with unsigned sample values, |
| 94 | * the unnormalized color/alpha component representation is only |
| 95 | * supported if two conditions hold. First, sample value value 0 must |
| 96 | * map to normalized component value 0.0 and sample value 2<sup>n</sup> - 1 |
| 97 | * to 1.0. Second the min/max range of all color components of the |
| 98 | * <code>ColorSpace</code> must be 0.0 to 1.0. In this case, the |
| 99 | * component representation is the n least |
| 100 | * significant bits of the corresponding sample. Thus each component is |
| 101 | * an unsigned integral value between 0 and 2<sup>n</sup> - 1, where |
| 102 | * n is the number of significant bits for a particular component. |
| 103 | * If these conditions are not met, any method taking an unnormalized |
| 104 | * component argument will throw an <code>IllegalArgumentException</code>. |
| 105 | * <p> |
| 106 | * Instances of <code>ComponentColorModel</code> created with transfer types |
| 107 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, <CODE>DataBuffer.TYPE_FLOAT</CODE>, and |
| 108 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE> have pixel sample values which |
| 109 | * are treated as signed short, float, or double values. |
| 110 | * Such instances do not support the unnormalized color/alpha component |
| 111 | * representation, so any methods taking such a representation as an argument |
| 112 | * will throw an <code>IllegalArgumentException</code> when called on one |
| 113 | * of these instances. The normalized component values of instances |
| 114 | * of this class have a range which depends on the transfer |
| 115 | * type as follows: for float samples, the full range of the float data |
| 116 | * type; for double samples, the full range of the float data type |
| 117 | * (resulting from casting double to float); for short samples, |
| 118 | * from approximately -maxVal to +maxVal, where maxVal is the per |
| 119 | * component maximum value for the <code>ColorSpace</code> |
| 120 | * (-32767 maps to -maxVal, 0 maps to 0.0, and 32767 maps |
| 121 | * to +maxVal). A subclass may override the scaling for short sample |
| 122 | * values to normalized component values by overriding the |
| 123 | * <code>getNormalizedComponents(Object, float[], int)</code> method. |
| 124 | * For float and double samples, the normalized component values are |
| 125 | * taken to be equal to the corresponding sample values, and subclasses |
| 126 | * should not attempt to add any non-identity scaling for these transfer |
| 127 | * types. |
| 128 | * <p> |
| 129 | * Instances of <code>ComponentColorModel</code> created with transfer types |
| 130 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, <CODE>DataBuffer.TYPE_FLOAT</CODE>, and |
| 131 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE> |
| 132 | * use all the bits of all sample values. Thus all color/alpha components |
| 133 | * have 16 bits when using <CODE>DataBuffer.TYPE_SHORT</CODE>, 32 bits when |
| 134 | * using <CODE>DataBuffer.TYPE_FLOAT</CODE>, and 64 bits when using |
| 135 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE>. When the |
| 136 | * <code>ComponentColorModel(ColorSpace, int[], boolean, boolean, int, int)</code> |
| 137 | * form of constructor is used with one of these transfer types, the |
| 138 | * bits array argument is ignored. |
| 139 | * <p> |
| 140 | * It is possible to have color/alpha sample values |
| 141 | * which cannot be reasonably interpreted as component values for rendering. |
| 142 | * This can happen when <code>ComponentColorModel</code> is subclassed to |
| 143 | * override the mapping of unsigned sample values to normalized color |
| 144 | * component values or when signed sample values outside a certain range |
| 145 | * are used. (As an example, specifying an alpha component as a signed |
| 146 | * short value outside the range 0 to 32767, normalized range 0.0 to 1.0, can |
| 147 | * lead to unexpected results.) It is the |
| 148 | * responsibility of applications to appropriately scale pixel data before |
| 149 | * rendering such that color components fall within the normalized range |
| 150 | * of the <code>ColorSpace</code> (obtained using the <code>getMinValue</code> |
| 151 | * and <code>getMaxValue</code> methods of the <code>ColorSpace</code> class) |
| 152 | * and the alpha component is between 0.0 and 1.0. If color or alpha |
| 153 | * component values fall outside these ranges, rendering results are |
| 154 | * indeterminate. |
| 155 | * <p> |
| 156 | * Methods that use a single int pixel representation throw |
| 157 | * an <CODE>IllegalArgumentException</CODE>, unless the number of components |
| 158 | * for the <CODE>ComponentColorModel</CODE> is one and the component |
| 159 | * value is unsigned -- in other words, a single color component using |
| 160 | * a transfer type of <CODE>DataBuffer.TYPE_BYTE</CODE>, |
| 161 | * <CODE>DataBuffer.TYPE_USHORT</CODE>, or <CODE>DataBuffer.TYPE_INT</CODE> |
| 162 | * and no alpha. |
| 163 | * <p> |
| 164 | * A <CODE>ComponentColorModel</CODE> can be used in conjunction with a |
| 165 | * <CODE>ComponentSampleModel</CODE>, a <CODE>BandedSampleModel</CODE>, |
| 166 | * or a <CODE>PixelInterleavedSampleModel</CODE> to construct a |
| 167 | * <CODE>BufferedImage</CODE>. |
| 168 | * |
| 169 | * @see ColorModel |
| 170 | * @see ColorSpace |
| 171 | * @see ComponentSampleModel |
| 172 | * @see BandedSampleModel |
| 173 | * @see PixelInterleavedSampleModel |
| 174 | * @see BufferedImage |
| 175 | * |
| 176 | */ |
| 177 | public class ComponentColorModel extends ColorModel { |
| 178 | |
| 179 | /** |
| 180 | * <code>signed</code> is <code>true</code> for <code>short</code>, |
| 181 | * <code>float</code>, and <code>double</code> transfer types; it |
| 182 | * is <code>false</code> for <code>byte</code>, <code>ushort</code>, |
| 183 | * and <code>int</code> transfer types. |
| 184 | */ |
| 185 | private boolean signed; // true for transfer types short, float, double |
| 186 | // false for byte, ushort, int |
| 187 | private boolean is_sRGB_stdScale; |
| 188 | private boolean is_LinearRGB_stdScale; |
| 189 | private boolean is_LinearGray_stdScale; |
| 190 | private boolean is_ICCGray_stdScale; |
| 191 | private byte[] tosRGB8LUT; |
| 192 | private byte[] fromsRGB8LUT8; |
| 193 | private short[] fromsRGB8LUT16; |
| 194 | private byte[] fromLinearGray16ToOtherGray8LUT; |
| 195 | private short[] fromLinearGray16ToOtherGray16LUT; |
| 196 | private boolean needScaleInit; |
| 197 | private boolean noUnnorm; |
| 198 | private boolean nonStdScale; |
| 199 | private float[] min; |
| 200 | private float[] diffMinMax; |
| 201 | private float[] compOffset; |
| 202 | private float[] compScale; |
| 203 | |
| 204 | /** |
| 205 | * Constructs a <CODE>ComponentColorModel</CODE> from the specified |
| 206 | * parameters. Color components will be in the specified |
| 207 | * <CODE>ColorSpace</CODE>. The supported transfer types are |
| 208 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 209 | * <CODE>DataBuffer.TYPE_INT</CODE>, |
| 210 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, <CODE>DataBuffer.TYPE_FLOAT</CODE>, |
| 211 | * and <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 212 | * If not null, the <CODE>bits</CODE> array specifies the |
| 213 | * number of significant bits per color and alpha component and its |
| 214 | * length should be at least the number of components in the |
| 215 | * <CODE>ColorSpace</CODE> if there is no alpha |
| 216 | * information in the pixel values, or one more than this number if |
| 217 | * there is alpha information. When the <CODE>transferType</CODE> is |
| 218 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, <CODE>DataBuffer.TYPE_FLOAT</CODE>, |
| 219 | * or <CODE>DataBuffer.TYPE_DOUBLE</CODE> the <CODE>bits</CODE> array |
| 220 | * argument is ignored. <CODE>hasAlpha</CODE> indicates whether alpha |
| 221 | * information is present. If <CODE>hasAlpha</CODE> is true, then |
| 222 | * the boolean <CODE>isAlphaPremultiplied</CODE> |
| 223 | * specifies how to interpret color and alpha samples in pixel values. |
| 224 | * If the boolean is true, color samples are assumed to have been |
| 225 | * multiplied by the alpha sample. The <CODE>transparency</CODE> |
| 226 | * specifies what alpha values can be represented by this color model. |
| 227 | * The acceptable <code>transparency</code> values are |
| 228 | * <CODE>OPAQUE</CODE>, <CODE>BITMASK</CODE> or <CODE>TRANSLUCENT</CODE>. |
| 229 | * The <CODE>transferType</CODE> is the type of primitive array used |
| 230 | * to represent pixel values. |
| 231 | * |
| 232 | * @param colorSpace The <CODE>ColorSpace</CODE> associated |
| 233 | * with this color model. |
| 234 | * @param bits The number of significant bits per component. |
| 235 | * May be null, in which case all bits of all |
| 236 | * component samples will be significant. |
| 237 | * Ignored if transferType is one of |
| 238 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 239 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or |
| 240 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE>, |
| 241 | * in which case all bits of all component |
| 242 | * samples will be significant. |
| 243 | * @param hasAlpha If true, this color model supports alpha. |
| 244 | * @param isAlphaPremultiplied If true, alpha is premultiplied. |
| 245 | * @param transparency Specifies what alpha values can be represented |
| 246 | * by this color model. |
| 247 | * @param transferType Specifies the type of primitive array used to |
| 248 | * represent pixel values. |
| 249 | * |
| 250 | * @throws IllegalArgumentException If the <CODE>bits</CODE> array |
| 251 | * argument is not null, its length is less than the number of |
| 252 | * color and alpha components, and transferType is one of |
| 253 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, |
| 254 | * <CODE>DataBuffer.TYPE_USHORT</CODE>, or |
| 255 | * <CODE>DataBuffer.TYPE_INT</CODE>. |
| 256 | * @throws IllegalArgumentException If transferType is not one of |
| 257 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, |
| 258 | * <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 259 | * <CODE>DataBuffer.TYPE_INT</CODE>, |
| 260 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 261 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or |
| 262 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 263 | * |
| 264 | * @see ColorSpace |
| 265 | * @see java.awt.Transparency |
| 266 | */ |
| 267 | public ComponentColorModel (ColorSpace colorSpace, |
| 268 | int[] bits, |
| 269 | boolean hasAlpha, |
| 270 | boolean isAlphaPremultiplied, |
| 271 | int transparency, |
| 272 | int transferType) { |
| 273 | super (bitsHelper(transferType, colorSpace, hasAlpha), |
| 274 | bitsArrayHelper(bits, transferType, colorSpace, hasAlpha), |
| 275 | colorSpace, hasAlpha, isAlphaPremultiplied, transparency, |
| 276 | transferType); |
| 277 | switch(transferType) { |
| 278 | case DataBuffer.TYPE_BYTE: |
| 279 | case DataBuffer.TYPE_USHORT: |
| 280 | case DataBuffer.TYPE_INT: |
| 281 | signed = false; |
| 282 | needScaleInit = true; |
| 283 | break; |
| 284 | case DataBuffer.TYPE_SHORT: |
| 285 | signed = true; |
| 286 | needScaleInit = true; |
| 287 | break; |
| 288 | case DataBuffer.TYPE_FLOAT: |
| 289 | case DataBuffer.TYPE_DOUBLE: |
| 290 | signed = true; |
| 291 | needScaleInit = false; |
| 292 | noUnnorm = true; |
| 293 | nonStdScale = false; |
| 294 | break; |
| 295 | default: |
| 296 | throw new IllegalArgumentException("This constructor is not "+ |
| 297 | "compatible with transferType " + transferType); |
| 298 | } |
| 299 | setupLUTs(); |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * Constructs a <CODE>ComponentColorModel</CODE> from the specified |
| 304 | * parameters. Color components will be in the specified |
| 305 | * <CODE>ColorSpace</CODE>. The supported transfer types are |
| 306 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 307 | * <CODE>DataBuffer.TYPE_INT</CODE>, |
| 308 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, <CODE>DataBuffer.TYPE_FLOAT</CODE>, |
| 309 | * and <CODE>DataBuffer.TYPE_DOUBLE</CODE>. The number of significant |
| 310 | * bits per color and alpha component will be 8, 16, 32, 16, 32, or 64, |
| 311 | * respectively. The number of color components will be the |
| 312 | * number of components in the <CODE>ColorSpace</CODE>. There will be |
| 313 | * an alpha component if <CODE>hasAlpha</CODE> is <CODE>true</CODE>. |
| 314 | * If <CODE>hasAlpha</CODE> is true, then |
| 315 | * the boolean <CODE>isAlphaPremultiplied</CODE> |
| 316 | * specifies how to interpret color and alpha samples in pixel values. |
| 317 | * If the boolean is true, color samples are assumed to have been |
| 318 | * multiplied by the alpha sample. The <CODE>transparency</CODE> |
| 319 | * specifies what alpha values can be represented by this color model. |
| 320 | * The acceptable <code>transparency</code> values are |
| 321 | * <CODE>OPAQUE</CODE>, <CODE>BITMASK</CODE> or <CODE>TRANSLUCENT</CODE>. |
| 322 | * The <CODE>transferType</CODE> is the type of primitive array used |
| 323 | * to represent pixel values. |
| 324 | * |
| 325 | * @param colorSpace The <CODE>ColorSpace</CODE> associated |
| 326 | * with this color model. |
| 327 | * @param hasAlpha If true, this color model supports alpha. |
| 328 | * @param isAlphaPremultiplied If true, alpha is premultiplied. |
| 329 | * @param transparency Specifies what alpha values can be represented |
| 330 | * by this color model. |
| 331 | * @param transferType Specifies the type of primitive array used to |
| 332 | * represent pixel values. |
| 333 | * |
| 334 | * @throws IllegalArgumentException If transferType is not one of |
| 335 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, |
| 336 | * <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 337 | * <CODE>DataBuffer.TYPE_INT</CODE>, |
| 338 | * <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 339 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or |
| 340 | * <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 341 | * |
| 342 | * @see ColorSpace |
| 343 | * @see java.awt.Transparency |
| 344 | * @since 1.4 |
| 345 | */ |
| 346 | public ComponentColorModel (ColorSpace colorSpace, |
| 347 | boolean hasAlpha, |
| 348 | boolean isAlphaPremultiplied, |
| 349 | int transparency, |
| 350 | int transferType) { |
| 351 | this(colorSpace, null, hasAlpha, isAlphaPremultiplied, |
| 352 | transparency, transferType); |
| 353 | } |
| 354 | |
| 355 | private static int bitsHelper(int transferType, |
| 356 | ColorSpace colorSpace, |
| 357 | boolean hasAlpha) { |
| 358 | int numBits = DataBuffer.getDataTypeSize(transferType); |
| 359 | int numComponents = colorSpace.getNumComponents(); |
| 360 | if (hasAlpha) { |
| 361 | ++numComponents; |
| 362 | } |
| 363 | return numBits * numComponents; |
| 364 | } |
| 365 | |
| 366 | private static int[] bitsArrayHelper(int[] origBits, |
| 367 | int transferType, |
| 368 | ColorSpace colorSpace, |
| 369 | boolean hasAlpha) { |
| 370 | switch(transferType) { |
| 371 | case DataBuffer.TYPE_BYTE: |
| 372 | case DataBuffer.TYPE_USHORT: |
| 373 | case DataBuffer.TYPE_INT: |
| 374 | if (origBits != null) { |
| 375 | return origBits; |
| 376 | } |
| 377 | break; |
| 378 | default: |
| 379 | break; |
| 380 | } |
| 381 | int numBits = DataBuffer.getDataTypeSize(transferType); |
| 382 | int numComponents = colorSpace.getNumComponents(); |
| 383 | if (hasAlpha) { |
| 384 | ++numComponents; |
| 385 | } |
| 386 | int[] bits = new int[numComponents]; |
| 387 | for (int i = 0; i < numComponents; i++) { |
| 388 | bits[i] = numBits; |
| 389 | } |
| 390 | return bits; |
| 391 | } |
| 392 | |
| 393 | private void setupLUTs() { |
| 394 | // REMIND: there is potential to accelerate sRGB, LinearRGB, |
| 395 | // LinearGray, ICCGray, and non-ICC Gray spaces with non-standard |
| 396 | // scaling, if that becomes important |
| 397 | // |
| 398 | // NOTE: The is_xxx_stdScale and nonStdScale booleans are provisionally |
| 399 | // set here when this method is called at construction time. These |
| 400 | // variables may be set again when initScale is called later. |
| 401 | // When setupLUTs returns, nonStdScale is true if (the transferType |
| 402 | // is not float or double) AND (some minimum ColorSpace component |
| 403 | // value is not 0.0 OR some maximum ColorSpace component value |
| 404 | // is not 1.0). This is correct for the calls to |
| 405 | // getNormalizedComponents(Object, float[], int) from initScale(). |
| 406 | // initScale() may change the value nonStdScale based on the |
| 407 | // return value of getNormalizedComponents() - this will only |
| 408 | // happen if getNormalizedComponents() has been overridden by a |
| 409 | // subclass to make the mapping of min/max pixel sample values |
| 410 | // something different from min/max color component values. |
| 411 | if (is_sRGB) { |
| 412 | is_sRGB_stdScale = true; |
| 413 | nonStdScale = false; |
| 414 | } else if (ColorModel.isLinearRGBspace(colorSpace)) { |
| 415 | // Note that the built-in Linear RGB space has a normalized |
| 416 | // range of 0.0 - 1.0 for each coordinate. Usage of these |
| 417 | // LUTs makes that assumption. |
| 418 | is_LinearRGB_stdScale = true; |
| 419 | nonStdScale = false; |
| 420 | if (transferType == DataBuffer.TYPE_BYTE) { |
| 421 | tosRGB8LUT = ColorModel.getLinearRGB8TosRGB8LUT(); |
| 422 | fromsRGB8LUT8 = ColorModel.getsRGB8ToLinearRGB8LUT(); |
| 423 | } else { |
| 424 | tosRGB8LUT = ColorModel.getLinearRGB16TosRGB8LUT(); |
| 425 | fromsRGB8LUT16 = ColorModel.getsRGB8ToLinearRGB16LUT(); |
| 426 | } |
| 427 | } else if ((colorSpaceType == ColorSpace.TYPE_GRAY) && |
| 428 | (colorSpace instanceof ICC_ColorSpace) && |
| 429 | (colorSpace.getMinValue(0) == 0.0f) && |
| 430 | (colorSpace.getMaxValue(0) == 1.0f)) { |
| 431 | // Note that a normalized range of 0.0 - 1.0 for the gray |
| 432 | // component is required, because usage of these LUTs makes |
| 433 | // that assumption. |
| 434 | ICC_ColorSpace ics = (ICC_ColorSpace) colorSpace; |
| 435 | is_ICCGray_stdScale = true; |
| 436 | nonStdScale = false; |
| 437 | fromsRGB8LUT16 = ColorModel.getsRGB8ToLinearRGB16LUT(); |
| 438 | if (ColorModel.isLinearGRAYspace(ics)) { |
| 439 | is_LinearGray_stdScale = true; |
| 440 | if (transferType == DataBuffer.TYPE_BYTE) { |
| 441 | tosRGB8LUT = ColorModel.getGray8TosRGB8LUT(ics); |
| 442 | } else { |
| 443 | tosRGB8LUT = ColorModel.getGray16TosRGB8LUT(ics); |
| 444 | } |
| 445 | } else { |
| 446 | if (transferType == DataBuffer.TYPE_BYTE) { |
| 447 | tosRGB8LUT = ColorModel.getGray8TosRGB8LUT(ics); |
| 448 | fromLinearGray16ToOtherGray8LUT = |
| 449 | ColorModel.getLinearGray16ToOtherGray8LUT(ics); |
| 450 | } else { |
| 451 | tosRGB8LUT = ColorModel.getGray16TosRGB8LUT(ics); |
| 452 | fromLinearGray16ToOtherGray16LUT = |
| 453 | ColorModel.getLinearGray16ToOtherGray16LUT(ics); |
| 454 | } |
| 455 | } |
| 456 | } else if (needScaleInit) { |
| 457 | // if transferType is byte, ushort, int, or short and we |
| 458 | // don't already know the ColorSpace has minVlaue == 0.0f and |
| 459 | // maxValue == 1.0f for all components, we need to check that |
| 460 | // now and setup the min[] and diffMinMax[] arrays if necessary. |
| 461 | nonStdScale = false; |
| 462 | for (int i = 0; i < numColorComponents; i++) { |
| 463 | if ((colorSpace.getMinValue(i) != 0.0f) || |
| 464 | (colorSpace.getMaxValue(i) != 1.0f)) { |
| 465 | nonStdScale = true; |
| 466 | break; |
| 467 | } |
| 468 | } |
| 469 | if (nonStdScale) { |
| 470 | min = new float[numColorComponents]; |
| 471 | diffMinMax = new float[numColorComponents]; |
| 472 | for (int i = 0; i < numColorComponents; i++) { |
| 473 | min[i] = colorSpace.getMinValue(i); |
| 474 | diffMinMax[i] = colorSpace.getMaxValue(i) - min[i]; |
| 475 | } |
| 476 | } |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | private void initScale() { |
| 481 | // This method is called the first time any method which uses |
| 482 | // pixel sample value to color component value scaling information |
| 483 | // is called if the transferType supports non-standard scaling |
| 484 | // as defined above (byte, ushort, int, and short), unless the |
| 485 | // method is getNormalizedComponents(Object, float[], int) (that |
| 486 | // method must be overridden to use non-standard scaling). This |
| 487 | // method also sets up the noUnnorm boolean variable for these |
| 488 | // transferTypes. After this method is called, the nonStdScale |
| 489 | // variable will be true if getNormalizedComponents() maps a |
| 490 | // sample value of 0 to anything other than 0.0f OR maps a |
| 491 | // sample value of 2^^n - 1 (2^^15 - 1 for short transferType) |
| 492 | // to anything other than 1.0f. Note that this can be independent |
| 493 | // of the colorSpace min/max component values, if the |
| 494 | // getNormalizedComponents() method has been overridden for some |
| 495 | // reason, e.g. to provide greater dynamic range in the sample |
| 496 | // values than in the color component values. Unfortunately, |
| 497 | // this method can't be called at construction time, since a |
| 498 | // subclass may still have uninitialized state that would cause |
| 499 | // getNormalizedComponents() to return an incorrect result. |
| 500 | needScaleInit = false; // only needs to called once |
| 501 | if (nonStdScale || signed) { |
| 502 | // The unnormalized form is only supported for unsigned |
| 503 | // transferTypes and when the ColorSpace min/max values |
| 504 | // are 0.0/1.0. When this method is called nonStdScale is |
| 505 | // true if the latter condition does not hold. In addition, |
| 506 | // the unnormalized form requires that the full range of |
| 507 | // the pixel sample values map to the full 0.0 - 1.0 range |
| 508 | // of color component values. That condition is checked |
| 509 | // later in this method. |
| 510 | noUnnorm = true; |
| 511 | } else { |
| 512 | noUnnorm = false; |
| 513 | } |
| 514 | float[] lowVal, highVal; |
| 515 | switch (transferType) { |
| 516 | case DataBuffer.TYPE_BYTE: |
| 517 | { |
| 518 | byte[] bpixel = new byte[numComponents]; |
| 519 | for (int i = 0; i < numColorComponents; i++) { |
| 520 | bpixel[i] = 0; |
| 521 | } |
| 522 | if (supportsAlpha) { |
| 523 | bpixel[numColorComponents] = |
| 524 | (byte) ((1 << nBits[numColorComponents]) - 1); |
| 525 | } |
| 526 | lowVal = getNormalizedComponents(bpixel, null, 0); |
| 527 | for (int i = 0; i < numColorComponents; i++) { |
| 528 | bpixel[i] = (byte) ((1 << nBits[i]) - 1); |
| 529 | } |
| 530 | highVal = getNormalizedComponents(bpixel, null, 0); |
| 531 | } |
| 532 | break; |
| 533 | case DataBuffer.TYPE_USHORT: |
| 534 | { |
| 535 | short[] uspixel = new short[numComponents]; |
| 536 | for (int i = 0; i < numColorComponents; i++) { |
| 537 | uspixel[i] = 0; |
| 538 | } |
| 539 | if (supportsAlpha) { |
| 540 | uspixel[numColorComponents] = |
| 541 | (short) ((1 << nBits[numColorComponents]) - 1); |
| 542 | } |
| 543 | lowVal = getNormalizedComponents(uspixel, null, 0); |
| 544 | for (int i = 0; i < numColorComponents; i++) { |
| 545 | uspixel[i] = (short) ((1 << nBits[i]) - 1); |
| 546 | } |
| 547 | highVal = getNormalizedComponents(uspixel, null, 0); |
| 548 | } |
| 549 | break; |
| 550 | case DataBuffer.TYPE_INT: |
| 551 | { |
| 552 | int[] ipixel = new int[numComponents]; |
| 553 | for (int i = 0; i < numColorComponents; i++) { |
| 554 | ipixel[i] = 0; |
| 555 | } |
| 556 | if (supportsAlpha) { |
| 557 | ipixel[numColorComponents] = |
| 558 | ((1 << nBits[numColorComponents]) - 1); |
| 559 | } |
| 560 | lowVal = getNormalizedComponents(ipixel, null, 0); |
| 561 | for (int i = 0; i < numColorComponents; i++) { |
| 562 | ipixel[i] = ((1 << nBits[i]) - 1); |
| 563 | } |
| 564 | highVal = getNormalizedComponents(ipixel, null, 0); |
| 565 | } |
| 566 | break; |
| 567 | case DataBuffer.TYPE_SHORT: |
| 568 | { |
| 569 | short[] spixel = new short[numComponents]; |
| 570 | for (int i = 0; i < numColorComponents; i++) { |
| 571 | spixel[i] = 0; |
| 572 | } |
| 573 | if (supportsAlpha) { |
| 574 | spixel[numColorComponents] = 32767; |
| 575 | } |
| 576 | lowVal = getNormalizedComponents(spixel, null, 0); |
| 577 | for (int i = 0; i < numColorComponents; i++) { |
| 578 | spixel[i] = 32767; |
| 579 | } |
| 580 | highVal = getNormalizedComponents(spixel, null, 0); |
| 581 | } |
| 582 | break; |
| 583 | default: |
| 584 | lowVal = highVal = null; // to keep the compiler from complaining |
| 585 | break; |
| 586 | } |
| 587 | nonStdScale = false; |
| 588 | for (int i = 0; i < numColorComponents; i++) { |
| 589 | if ((lowVal[i] != 0.0f) || (highVal[i] != 1.0f)) { |
| 590 | nonStdScale = true; |
| 591 | break; |
| 592 | } |
| 593 | } |
| 594 | if (nonStdScale) { |
| 595 | noUnnorm = true; |
| 596 | is_sRGB_stdScale = false; |
| 597 | is_LinearRGB_stdScale = false; |
| 598 | is_LinearGray_stdScale = false; |
| 599 | is_ICCGray_stdScale = false; |
| 600 | compOffset = new float[numColorComponents]; |
| 601 | compScale = new float[numColorComponents]; |
| 602 | for (int i = 0; i < numColorComponents; i++) { |
| 603 | compOffset[i] = lowVal[i]; |
| 604 | compScale[i] = 1.0f / (highVal[i] - lowVal[i]); |
| 605 | } |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | private int getRGBComponent(int pixel, int idx) { |
| 610 | if (numComponents > 1) { |
| 611 | throw new |
| 612 | IllegalArgumentException("More than one component per pixel"); |
| 613 | } |
| 614 | if (signed) { |
| 615 | throw new |
| 616 | IllegalArgumentException("Component value is signed"); |
| 617 | } |
| 618 | if (needScaleInit) { |
| 619 | initScale(); |
| 620 | } |
| 621 | // Since there is only 1 component, there is no alpha |
| 622 | |
| 623 | // Normalize the pixel in order to convert it |
| 624 | Object opixel = null; |
| 625 | switch (transferType) { |
| 626 | case DataBuffer.TYPE_BYTE: |
| 627 | { |
| 628 | byte[] bpixel = { (byte) pixel }; |
| 629 | opixel = bpixel; |
| 630 | } |
| 631 | break; |
| 632 | case DataBuffer.TYPE_USHORT: |
| 633 | { |
| 634 | short[] spixel = { (short) pixel }; |
| 635 | opixel = spixel; |
| 636 | } |
| 637 | break; |
| 638 | case DataBuffer.TYPE_INT: |
| 639 | { |
| 640 | int[] ipixel = { pixel }; |
| 641 | opixel = ipixel; |
| 642 | } |
| 643 | break; |
| 644 | } |
| 645 | float[] norm = getNormalizedComponents(opixel, null, 0); |
| 646 | float[] rgb = colorSpace.toRGB(norm); |
| 647 | |
| 648 | return (int) (rgb[idx] * 255.0f + 0.5f); |
| 649 | } |
| 650 | |
| 651 | /** |
| 652 | * Returns the red color component for the specified pixel, scaled |
| 653 | * from 0 to 255 in the default RGB ColorSpace, sRGB. A color conversion |
| 654 | * is done if necessary. The pixel value is specified as an int. |
| 655 | * The returned value will be a non pre-multiplied value. |
| 656 | * If the alpha is premultiplied, this method divides |
| 657 | * it out before returning the value (if the alpha value is 0, |
| 658 | * the red value will be 0). |
| 659 | * |
| 660 | * @param pixel The pixel from which you want to get the red color component. |
| 661 | * |
| 662 | * @return The red color component for the specified pixel, as an int. |
| 663 | * |
| 664 | * @throws IllegalArgumentException If there is more than |
| 665 | * one component in this <CODE>ColorModel</CODE>. |
| 666 | * @throws IllegalArgumentException If the component value for this |
| 667 | * <CODE>ColorModel</CODE> is signed |
| 668 | */ |
| 669 | public int getRed(int pixel) { |
| 670 | return getRGBComponent(pixel, 0); |
| 671 | } |
| 672 | |
| 673 | /** |
| 674 | * Returns the green color component for the specified pixel, scaled |
| 675 | * from 0 to 255 in the default RGB ColorSpace, sRGB. A color conversion |
| 676 | * is done if necessary. The pixel value is specified as an int. |
| 677 | * The returned value will be a non |
| 678 | * pre-multiplied value. If the alpha is premultiplied, this method |
| 679 | * divides it out before returning the value (if the alpha value is 0, |
| 680 | * the green value will be 0). |
| 681 | * |
| 682 | * @param pixel The pixel from which you want to get the green color component. |
| 683 | * |
| 684 | * @return The green color component for the specified pixel, as an int. |
| 685 | * |
| 686 | * @throws IllegalArgumentException If there is more than |
| 687 | * one component in this <CODE>ColorModel</CODE>. |
| 688 | * @throws IllegalArgumentException If the component value for this |
| 689 | * <CODE>ColorModel</CODE> is signed |
| 690 | */ |
| 691 | public int getGreen(int pixel) { |
| 692 | return getRGBComponent(pixel, 1); |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * Returns the blue color component for the specified pixel, scaled |
| 697 | * from 0 to 255 in the default RGB ColorSpace, sRGB. A color conversion |
| 698 | * is done if necessary. The pixel value is specified as an int. |
| 699 | * The returned value will be a non |
| 700 | * pre-multiplied value. If the alpha is premultiplied, this method |
| 701 | * divides it out before returning the value (if the alpha value is 0, |
| 702 | * the blue value will be 0). |
| 703 | * |
| 704 | * @param pixel The pixel from which you want to get the blue color component. |
| 705 | * |
| 706 | * @return The blue color component for the specified pixel, as an int. |
| 707 | * |
| 708 | * @throws IllegalArgumentException If there is more than |
| 709 | * one component in this <CODE>ColorModel</CODE>. |
| 710 | * @throws IllegalArgumentException If the component value for this |
| 711 | * <CODE>ColorModel</CODE> is signed |
| 712 | */ |
| 713 | public int getBlue(int pixel) { |
| 714 | return getRGBComponent(pixel, 2); |
| 715 | } |
| 716 | |
| 717 | /** |
| 718 | * Returns the alpha component for the specified pixel, scaled |
| 719 | * from 0 to 255. The pixel value is specified as an int. |
| 720 | * |
| 721 | * @param pixel The pixel from which you want to get the alpha component. |
| 722 | * |
| 723 | * @return The alpha component for the specified pixel, as an int. |
| 724 | * |
| 725 | * @throws IllegalArgumentException If there is more than |
| 726 | * one component in this <CODE>ColorModel</CODE>. |
| 727 | * @throws IllegalArgumentException If the component value for this |
| 728 | * <CODE>ColorModel</CODE> is signed |
| 729 | */ |
| 730 | public int getAlpha(int pixel) { |
| 731 | if (supportsAlpha == false) { |
| 732 | return 255; |
| 733 | } |
| 734 | if (numComponents > 1) { |
| 735 | throw new |
| 736 | IllegalArgumentException("More than one component per pixel"); |
| 737 | } |
| 738 | if (signed) { |
| 739 | throw new |
| 740 | IllegalArgumentException("Component value is signed"); |
| 741 | } |
| 742 | |
| 743 | return (int) ((((float) pixel) / ((1<<nBits[0])-1)) * 255.0f + 0.5f); |
| 744 | } |
| 745 | |
| 746 | /** |
| 747 | * Returns the color/alpha components of the pixel in the default |
| 748 | * RGB color model format. A color conversion is done if necessary. |
| 749 | * The returned value will be in a non pre-multiplied format. If |
| 750 | * the alpha is premultiplied, this method divides it out of the |
| 751 | * color components (if the alpha value is 0, the color values will be 0). |
| 752 | * |
| 753 | * @param pixel The pixel from which you want to get the color/alpha components. |
| 754 | * |
| 755 | * @return The color/alpha components for the specified pixel, as an int. |
| 756 | * |
| 757 | * @throws IllegalArgumentException If there is more than |
| 758 | * one component in this <CODE>ColorModel</CODE>. |
| 759 | * @throws IllegalArgumentException If the component value for this |
| 760 | * <CODE>ColorModel</CODE> is signed |
| 761 | */ |
| 762 | public int getRGB(int pixel) { |
| 763 | if (numComponents > 1) { |
| 764 | throw new |
| 765 | IllegalArgumentException("More than one component per pixel"); |
| 766 | } |
| 767 | if (signed) { |
| 768 | throw new |
| 769 | IllegalArgumentException("Component value is signed"); |
| 770 | } |
| 771 | |
| 772 | return (getAlpha(pixel) << 24) |
| 773 | | (getRed(pixel) << 16) |
| 774 | | (getGreen(pixel) << 8) |
| 775 | | (getBlue(pixel) << 0); |
| 776 | } |
| 777 | |
| 778 | private int extractComponent(Object inData, int idx, int precision) { |
| 779 | // Extract component idx from inData. The precision argument |
| 780 | // should be either 8 or 16. If it's 8, this method will return |
| 781 | // an 8-bit value. If it's 16, this method will return a 16-bit |
| 782 | // value for transferTypes other than TYPE_BYTE. For TYPE_BYTE, |
| 783 | // an 8-bit value will be returned. |
| 784 | |
| 785 | // This method maps the input value corresponding to a |
| 786 | // normalized ColorSpace component value of 0.0 to 0, and the |
| 787 | // input value corresponding to a normalized ColorSpace |
| 788 | // component value of 1.0 to 2^n - 1 (where n is 8 or 16), so |
| 789 | // it is appropriate only for ColorSpaces with min/max component |
| 790 | // values of 0.0/1.0. This will be true for sRGB, the built-in |
| 791 | // Linear RGB and Linear Gray spaces, and any other ICC grayscale |
| 792 | // spaces for which we have precomputed LUTs. |
| 793 | |
| 794 | boolean needAlpha = (supportsAlpha && isAlphaPremultiplied); |
| 795 | int alp = 0; |
| 796 | int comp; |
| 797 | int mask = (1 << nBits[idx]) - 1; |
| 798 | |
| 799 | switch (transferType) { |
| 800 | // Note: we do no clamping of the pixel data here - we |
| 801 | // assume that the data is scaled properly |
| 802 | case DataBuffer.TYPE_SHORT: { |
| 803 | short sdata[] = (short[]) inData; |
| 804 | float scalefactor = (float) ((1 << precision) - 1); |
| 805 | if (needAlpha) { |
| 806 | short s = sdata[numColorComponents]; |
| 807 | if (s != (short) 0) { |
| 808 | return (int) ((((float) sdata[idx]) / |
| 809 | ((float) s)) * scalefactor + 0.5f); |
| 810 | } else { |
| 811 | return 0; |
| 812 | } |
| 813 | } else { |
| 814 | return (int) ((sdata[idx] / 32767.0f) * scalefactor + 0.5f); |
| 815 | } |
| 816 | } |
| 817 | case DataBuffer.TYPE_FLOAT: { |
| 818 | float fdata[] = (float[]) inData; |
| 819 | float scalefactor = (float) ((1 << precision) - 1); |
| 820 | if (needAlpha) { |
| 821 | float f = fdata[numColorComponents]; |
| 822 | if (f != 0.0f) { |
| 823 | return (int) (((fdata[idx] / f) * scalefactor) + 0.5f); |
| 824 | } else { |
| 825 | return 0; |
| 826 | } |
| 827 | } else { |
| 828 | return (int) (fdata[idx] * scalefactor + 0.5f); |
| 829 | } |
| 830 | } |
| 831 | case DataBuffer.TYPE_DOUBLE: { |
| 832 | double ddata[] = (double[]) inData; |
| 833 | double scalefactor = (double) ((1 << precision) - 1); |
| 834 | if (needAlpha) { |
| 835 | double d = ddata[numColorComponents]; |
| 836 | if (d != 0.0) { |
| 837 | return (int) (((ddata[idx] / d) * scalefactor) + 0.5); |
| 838 | } else { |
| 839 | return 0; |
| 840 | } |
| 841 | } else { |
| 842 | return (int) (ddata[idx] * scalefactor + 0.5); |
| 843 | } |
| 844 | } |
| 845 | case DataBuffer.TYPE_BYTE: |
| 846 | byte bdata[] = (byte[])inData; |
| 847 | comp = bdata[idx] & mask; |
| 848 | precision = 8; |
| 849 | if (needAlpha) { |
| 850 | alp = bdata[numColorComponents] & mask; |
| 851 | } |
| 852 | break; |
| 853 | case DataBuffer.TYPE_USHORT: |
| 854 | short usdata[] = (short[])inData; |
| 855 | comp = usdata[idx] & mask; |
| 856 | if (needAlpha) { |
| 857 | alp = usdata[numColorComponents] & mask; |
| 858 | } |
| 859 | break; |
| 860 | case DataBuffer.TYPE_INT: |
| 861 | int idata[] = (int[])inData; |
| 862 | comp = idata[idx]; |
| 863 | if (needAlpha) { |
| 864 | alp = idata[numColorComponents]; |
| 865 | } |
| 866 | break; |
| 867 | default: |
| 868 | throw new |
| 869 | UnsupportedOperationException("This method has not "+ |
| 870 | "been implemented for transferType " + transferType); |
| 871 | } |
| 872 | if (needAlpha) { |
| 873 | if (alp != 0) { |
| 874 | float scalefactor = (float) ((1 << precision) - 1); |
| 875 | float fcomp = ((float) comp) / ((float)mask); |
| 876 | float invalp = ((float) ((1<<nBits[numColorComponents]) - 1)) / |
| 877 | ((float) alp); |
| 878 | return (int) (fcomp * invalp * scalefactor + 0.5f); |
| 879 | } else { |
| 880 | return 0; |
| 881 | } |
| 882 | } else { |
| 883 | if (nBits[idx] != precision) { |
| 884 | float scalefactor = (float) ((1 << precision) - 1); |
| 885 | float fcomp = ((float) comp) / ((float)mask); |
| 886 | return (int) (fcomp * scalefactor + 0.5f); |
| 887 | } |
| 888 | return comp; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | private int getRGBComponent(Object inData, int idx) { |
| 893 | if (needScaleInit) { |
| 894 | initScale(); |
| 895 | } |
| 896 | if (is_sRGB_stdScale) { |
| 897 | return extractComponent(inData, idx, 8); |
| 898 | } else if (is_LinearRGB_stdScale) { |
| 899 | int lutidx = extractComponent(inData, idx, 16); |
| 900 | return tosRGB8LUT[lutidx] & 0xff; |
| 901 | } else if (is_ICCGray_stdScale) { |
| 902 | int lutidx = extractComponent(inData, 0, 16); |
| 903 | return tosRGB8LUT[lutidx] & 0xff; |
| 904 | } |
| 905 | |
| 906 | // Not CS_sRGB, CS_LINEAR_RGB, or any TYPE_GRAY ICC_ColorSpace |
| 907 | float[] norm = getNormalizedComponents(inData, null, 0); |
| 908 | // Note that getNormalizedComponents returns non-premultiplied values |
| 909 | float[] rgb = colorSpace.toRGB(norm); |
| 910 | return (int) (rgb[idx] * 255.0f + 0.5f); |
| 911 | } |
| 912 | |
| 913 | /** |
| 914 | * Returns the red color component for the specified pixel, scaled |
| 915 | * from 0 to 255 in the default RGB ColorSpace, sRGB. A color conversion |
| 916 | * is done if necessary. The <CODE>pixel</CODE> value is specified by an array |
| 917 | * of data elements of type <CODE>transferType</CODE> passed in as an object |
| 918 | * reference. The returned value will be a non pre-multiplied value. If the |
| 919 | * alpha is premultiplied, this method divides it out before returning |
| 920 | * the value (if the alpha value is 0, the red value will be 0). Since |
| 921 | * <code>ComponentColorModel</code> can be subclassed, subclasses |
| 922 | * inherit the implementation of this method and if they don't override |
| 923 | * it then they throw an exception if they use an unsupported |
| 924 | * <code>transferType</code>. |
| 925 | * |
| 926 | * @param inData The pixel from which you want to get the red color component, |
| 927 | * specified by an array of data elements of type <CODE>transferType</CODE>. |
| 928 | * |
| 929 | * @return The red color component for the specified pixel, as an int. |
| 930 | * |
| 931 | * @throws ClassCastException If <CODE>inData</CODE> is not a primitive array |
| 932 | * of type <CODE>transferType</CODE>. |
| 933 | * @throws ArrayIndexOutOfBoundsException if <CODE>inData</CODE> is not |
| 934 | * large enough to hold a pixel value for this |
| 935 | * <CODE>ColorModel</CODE>. |
| 936 | * @throws UnsupportedOperationException If the transfer type of |
| 937 | * this <CODE>ComponentColorModel</CODE> |
| 938 | * is not one of the supported transfer types: |
| 939 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 940 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 941 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 942 | */ |
| 943 | public int getRed(Object inData) { |
| 944 | return getRGBComponent(inData, 0); |
| 945 | } |
| 946 | |
| 947 | |
| 948 | /** |
| 949 | * Returns the green color component for the specified pixel, scaled |
| 950 | * from 0 to 255 in the default RGB <CODE>ColorSpace</CODE>, sRGB. |
| 951 | * A color conversion is done if necessary. The <CODE>pixel</CODE> value |
| 952 | * is specified by an array of data elements of type <CODE>transferType</CODE> |
| 953 | * passed in as an object reference. The returned value is a non pre-multiplied |
| 954 | * value. If the alpha is premultiplied, this method divides it out before |
| 955 | * returning the value (if the alpha value is 0, the green value will be 0). |
| 956 | * Since <code>ComponentColorModel</code> can be subclassed, |
| 957 | * subclasses inherit the implementation of this method and if they |
| 958 | * don't override it then they throw an exception if they use an |
| 959 | * unsupported <code>transferType</code>. |
| 960 | * |
| 961 | * @param inData The pixel from which you want to get the green color component, |
| 962 | * specified by an array of data elements of type <CODE>transferType</CODE>. |
| 963 | * |
| 964 | * @return The green color component for the specified pixel, as an int. |
| 965 | * |
| 966 | * @throws ClassCastException If <CODE>inData</CODE> is not a primitive array |
| 967 | * of type <CODE>transferType</CODE>. |
| 968 | * @throws ArrayIndexOutOfBoundsException if <CODE>inData</CODE> is not |
| 969 | * large enough to hold a pixel value for this |
| 970 | * <CODE>ColorModel</CODE>. |
| 971 | * @throws UnsupportedOperationException If the transfer type of |
| 972 | * this <CODE>ComponentColorModel</CODE> |
| 973 | * is not one of the supported transfer types: |
| 974 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 975 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 976 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 977 | */ |
| 978 | public int getGreen(Object inData) { |
| 979 | return getRGBComponent(inData, 1); |
| 980 | } |
| 981 | |
| 982 | |
| 983 | /** |
| 984 | * Returns the blue color component for the specified pixel, scaled |
| 985 | * from 0 to 255 in the default RGB <CODE>ColorSpace</CODE>, sRGB. |
| 986 | * A color conversion is done if necessary. The <CODE>pixel</CODE> value is |
| 987 | * specified by an array of data elements of type <CODE>transferType</CODE> |
| 988 | * passed in as an object reference. The returned value is a non pre-multiplied |
| 989 | * value. If the alpha is premultiplied, this method divides it out before |
| 990 | * returning the value (if the alpha value is 0, the blue value will be 0). |
| 991 | * Since <code>ComponentColorModel</code> can be subclassed, |
| 992 | * subclasses inherit the implementation of this method and if they |
| 993 | * don't override it then they throw an exception if they use an |
| 994 | * unsupported <code>transferType</code>. |
| 995 | * |
| 996 | * @param inData The pixel from which you want to get the blue color component, |
| 997 | * specified by an array of data elements of type <CODE>transferType</CODE>. |
| 998 | * |
| 999 | * @return The blue color component for the specified pixel, as an int. |
| 1000 | * |
| 1001 | * @throws ClassCastException If <CODE>inData</CODE> is not a primitive array |
| 1002 | * of type <CODE>transferType</CODE>. |
| 1003 | * @throws ArrayIndexOutOfBoundsException if <CODE>inData</CODE> is not |
| 1004 | * large enough to hold a pixel value for this |
| 1005 | * <CODE>ColorModel</CODE>. |
| 1006 | * @throws UnsupportedOperationException If the transfer type of |
| 1007 | * this <CODE>ComponentColorModel</CODE> |
| 1008 | * is not one of the supported transfer types: |
| 1009 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1010 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 1011 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 1012 | */ |
| 1013 | public int getBlue(Object inData) { |
| 1014 | return getRGBComponent(inData, 2); |
| 1015 | } |
| 1016 | |
| 1017 | /** |
| 1018 | * Returns the alpha component for the specified pixel, scaled from |
| 1019 | * 0 to 255. The pixel value is specified by an array of data |
| 1020 | * elements of type <CODE>transferType</CODE> passed in as an |
| 1021 | * object reference. Since <code>ComponentColorModel</code> can be |
| 1022 | * subclassed, subclasses inherit the |
| 1023 | * implementation of this method and if they don't override it then |
| 1024 | * they throw an exception if they use an unsupported |
| 1025 | * <code>transferType</code>. |
| 1026 | * |
| 1027 | * @param inData The pixel from which you want to get the alpha component, |
| 1028 | * specified by an array of data elements of type <CODE>transferType</CODE>. |
| 1029 | * |
| 1030 | * @return The alpha component for the specified pixel, as an int. |
| 1031 | * |
| 1032 | * @throws ClassCastException If <CODE>inData</CODE> is not a primitive array |
| 1033 | * of type <CODE>transferType</CODE>. |
| 1034 | * @throws ArrayIndexOutOfBoundsException if <CODE>inData</CODE> is not |
| 1035 | * large enough to hold a pixel value for this |
| 1036 | * <CODE>ColorModel</CODE>. |
| 1037 | * @throws UnsupportedOperationException If the transfer type of |
| 1038 | * this <CODE>ComponentColorModel</CODE> |
| 1039 | * is not one of the supported transfer types: |
| 1040 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1041 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 1042 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 1043 | */ |
| 1044 | public int getAlpha(Object inData) { |
| 1045 | if (supportsAlpha == false) { |
| 1046 | return 255; |
| 1047 | } |
| 1048 | |
| 1049 | int alpha = 0; |
| 1050 | int aIdx = numColorComponents; |
| 1051 | int mask = (1 << nBits[aIdx]) - 1; |
| 1052 | |
| 1053 | switch (transferType) { |
| 1054 | case DataBuffer.TYPE_SHORT: |
| 1055 | short sdata[] = (short[])inData; |
| 1056 | alpha = (int) ((sdata[aIdx] / 32767.0f) * 255.0f + 0.5f); |
| 1057 | return alpha; |
| 1058 | case DataBuffer.TYPE_FLOAT: |
| 1059 | float fdata[] = (float[])inData; |
| 1060 | alpha = (int) (fdata[aIdx] * 255.0f + 0.5f); |
| 1061 | return alpha; |
| 1062 | case DataBuffer.TYPE_DOUBLE: |
| 1063 | double ddata[] = (double[])inData; |
| 1064 | alpha = (int) (ddata[aIdx] * 255.0 + 0.5); |
| 1065 | return alpha; |
| 1066 | case DataBuffer.TYPE_BYTE: |
| 1067 | byte bdata[] = (byte[])inData; |
| 1068 | alpha = bdata[aIdx] & mask; |
| 1069 | break; |
| 1070 | case DataBuffer.TYPE_USHORT: |
| 1071 | short usdata[] = (short[])inData; |
| 1072 | alpha = usdata[aIdx] & mask; |
| 1073 | break; |
| 1074 | case DataBuffer.TYPE_INT: |
| 1075 | int idata[] = (int[])inData; |
| 1076 | alpha = idata[aIdx]; |
| 1077 | break; |
| 1078 | default: |
| 1079 | throw new |
| 1080 | UnsupportedOperationException("This method has not "+ |
| 1081 | "been implemented for transferType " + transferType); |
| 1082 | } |
| 1083 | |
| 1084 | if (nBits[aIdx] == 8) { |
| 1085 | return alpha; |
| 1086 | } else { |
| 1087 | return (int) |
| 1088 | ((((float) alpha) / ((float) ((1 << nBits[aIdx]) - 1))) * |
| 1089 | 255.0f + 0.5f); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | /** |
| 1094 | * Returns the color/alpha components for the specified pixel in the |
| 1095 | * default RGB color model format. A color conversion is done if |
| 1096 | * necessary. The pixel value is specified by an |
| 1097 | * array of data elements of type <CODE>transferType</CODE> passed |
| 1098 | * in as an object reference. |
| 1099 | * The returned value is in a non pre-multiplied format. If |
| 1100 | * the alpha is premultiplied, this method divides it out of the |
| 1101 | * color components (if the alpha value is 0, the color values will be 0). |
| 1102 | * Since <code>ComponentColorModel</code> can be subclassed, |
| 1103 | * subclasses inherit the implementation of this method and if they |
| 1104 | * don't override it then they throw an exception if they use an |
| 1105 | * unsupported <code>transferType</code>. |
| 1106 | * |
| 1107 | * @param inData The pixel from which you want to get the color/alpha components, |
| 1108 | * specified by an array of data elements of type <CODE>transferType</CODE>. |
| 1109 | * |
| 1110 | * @return The color/alpha components for the specified pixel, as an int. |
| 1111 | * |
| 1112 | * @throws ClassCastException If <CODE>inData</CODE> is not a primitive array |
| 1113 | * of type <CODE>transferType</CODE>. |
| 1114 | * @throws ArrayIndexOutOfBoundsException if <CODE>inData</CODE> is not |
| 1115 | * large enough to hold a pixel value for this |
| 1116 | * <CODE>ColorModel</CODE>. |
| 1117 | * @throws UnsupportedOperationException If the transfer type of |
| 1118 | * this <CODE>ComponentColorModel</CODE> |
| 1119 | * is not one of the supported transfer types: |
| 1120 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1121 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 1122 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 1123 | * @see ColorModel#getRGBdefault |
| 1124 | */ |
| 1125 | public int getRGB(Object inData) { |
| 1126 | if (needScaleInit) { |
| 1127 | initScale(); |
| 1128 | } |
| 1129 | if (is_sRGB_stdScale || is_LinearRGB_stdScale) { |
| 1130 | return (getAlpha(inData) << 24) |
| 1131 | | (getRed(inData) << 16) |
| 1132 | | (getGreen(inData) << 8) |
| 1133 | | (getBlue(inData)); |
| 1134 | } else if (colorSpaceType == ColorSpace.TYPE_GRAY) { |
| 1135 | int gray = getRed(inData); // Red sRGB component should equal |
| 1136 | // green and blue components |
| 1137 | return (getAlpha(inData) << 24) |
| 1138 | | (gray << 16) |
| 1139 | | (gray << 8) |
| 1140 | | gray; |
| 1141 | } |
| 1142 | float[] norm = getNormalizedComponents(inData, null, 0); |
| 1143 | // Note that getNormalizedComponents returns non-premult values |
| 1144 | float[] rgb = colorSpace.toRGB(norm); |
| 1145 | return (getAlpha(inData) << 24) |
| 1146 | | (((int) (rgb[0] * 255.0f + 0.5f)) << 16) |
| 1147 | | (((int) (rgb[1] * 255.0f + 0.5f)) << 8) |
| 1148 | | (((int) (rgb[2] * 255.0f + 0.5f)) << 0); |
| 1149 | } |
| 1150 | |
| 1151 | /** |
| 1152 | * Returns a data element array representation of a pixel in this |
| 1153 | * <CODE>ColorModel</CODE>, given an integer pixel representation |
| 1154 | * in the default RGB color model. |
| 1155 | * This array can then be passed to the <CODE>setDataElements</CODE> |
| 1156 | * method of a <CODE>WritableRaster</CODE> object. If the |
| 1157 | * <CODE>pixel</CODE> |
| 1158 | * parameter is null, a new array is allocated. Since |
| 1159 | * <code>ComponentColorModel</code> can be subclassed, subclasses |
| 1160 | * inherit the implementation of this method and if they don't |
| 1161 | * override it then |
| 1162 | * they throw an exception if they use an unsupported |
| 1163 | * <code>transferType</code>. |
| 1164 | * |
| 1165 | * @param rgb the integer representation of the pixel in the RGB |
| 1166 | * color model |
| 1167 | * @param pixel the specified pixel |
| 1168 | * @return The data element array representation of a pixel |
| 1169 | * in this <CODE>ColorModel</CODE>. |
| 1170 | * @throws ClassCastException If <CODE>pixel</CODE> is not null and |
| 1171 | * is not a primitive array of type <CODE>transferType</CODE>. |
| 1172 | * @throws ArrayIndexOutOfBoundsException If <CODE>pixel</CODE> is |
| 1173 | * not large enough to hold a pixel value for this |
| 1174 | * <CODE>ColorModel</CODE>. |
| 1175 | * @throws UnsupportedOperationException If the transfer type of |
| 1176 | * this <CODE>ComponentColorModel</CODE> |
| 1177 | * is not one of the supported transfer types: |
| 1178 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1179 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 1180 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 1181 | * |
| 1182 | * @see WritableRaster#setDataElements |
| 1183 | * @see SampleModel#setDataElements |
| 1184 | */ |
| 1185 | public Object getDataElements(int rgb, Object pixel) { |
| 1186 | // REMIND: Use rendering hints? |
| 1187 | |
| 1188 | int red, grn, blu, alp; |
| 1189 | red = (rgb>>16) & 0xff; |
| 1190 | grn = (rgb>>8) & 0xff; |
| 1191 | blu = rgb & 0xff; |
| 1192 | |
| 1193 | if (needScaleInit) { |
| 1194 | initScale(); |
| 1195 | } |
| 1196 | if (signed) { |
| 1197 | // Handle SHORT, FLOAT, & DOUBLE here |
| 1198 | |
| 1199 | switch(transferType) { |
| 1200 | case DataBuffer.TYPE_SHORT: |
| 1201 | { |
| 1202 | short sdata[]; |
| 1203 | if (pixel == null) { |
| 1204 | sdata = new short[numComponents]; |
| 1205 | } else { |
| 1206 | sdata = (short[])pixel; |
| 1207 | } |
| 1208 | float factor; |
| 1209 | if (is_sRGB_stdScale || is_LinearRGB_stdScale) { |
| 1210 | factor = 32767.0f / 255.0f; |
| 1211 | if (is_LinearRGB_stdScale) { |
| 1212 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1213 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1214 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1215 | factor = 32767.0f / 65535.0f; |
| 1216 | } |
| 1217 | if (supportsAlpha) { |
| 1218 | alp = (rgb>>24) & 0xff; |
| 1219 | sdata[3] = |
| 1220 | (short) (alp * (32767.0f / 255.0f) + 0.5f); |
| 1221 | if (isAlphaPremultiplied) { |
| 1222 | factor = alp * factor * (1.0f / 255.0f); |
| 1223 | } |
| 1224 | } |
| 1225 | sdata[0] = (short) (red * factor + 0.5f); |
| 1226 | sdata[1] = (short) (grn * factor + 0.5f); |
| 1227 | sdata[2] = (short) (blu * factor + 0.5f); |
| 1228 | } else if (is_LinearGray_stdScale) { |
| 1229 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1230 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1231 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1232 | float gray = ((0.2125f * red) + |
| 1233 | (0.7154f * grn) + |
| 1234 | (0.0721f * blu)) / 65535.0f; |
| 1235 | factor = 32767.0f; |
| 1236 | if (supportsAlpha) { |
| 1237 | alp = (rgb>>24) & 0xff; |
| 1238 | sdata[1] = |
| 1239 | (short) (alp * (32767.0f / 255.0f) + 0.5f); |
| 1240 | if (isAlphaPremultiplied) { |
| 1241 | factor = alp * factor * (1.0f / 255.0f); |
| 1242 | } |
| 1243 | } |
| 1244 | sdata[0] = (short) (gray * factor + 0.5f); |
| 1245 | } else if (is_ICCGray_stdScale) { |
| 1246 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1247 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1248 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1249 | int gray = (int) ((0.2125f * red) + |
| 1250 | (0.7154f * grn) + |
| 1251 | (0.0721f * blu) + 0.5f); |
| 1252 | gray = fromLinearGray16ToOtherGray16LUT[gray] & 0xffff; |
| 1253 | factor = 32767.0f / 65535.0f; |
| 1254 | if (supportsAlpha) { |
| 1255 | alp = (rgb>>24) & 0xff; |
| 1256 | sdata[1] = |
| 1257 | (short) (alp * (32767.0f / 255.0f) + 0.5f); |
| 1258 | if (isAlphaPremultiplied) { |
| 1259 | factor = alp * factor * (1.0f / 255.0f); |
| 1260 | } |
| 1261 | } |
| 1262 | sdata[0] = (short) (gray * factor + 0.5f); |
| 1263 | } else { |
| 1264 | factor = 1.0f / 255.0f; |
| 1265 | float norm[] = new float[3]; |
| 1266 | norm[0] = red * factor; |
| 1267 | norm[1] = grn * factor; |
| 1268 | norm[2] = blu * factor; |
| 1269 | norm = colorSpace.fromRGB(norm); |
| 1270 | if (nonStdScale) { |
| 1271 | for (int i = 0; i < numColorComponents; i++) { |
| 1272 | norm[i] = (norm[i] - compOffset[i]) * |
| 1273 | compScale[i]; |
| 1274 | // REMIND: need to analyze whether this |
| 1275 | // clamping is necessary |
| 1276 | if (norm[i] < 0.0f) { |
| 1277 | norm[i] = 0.0f; |
| 1278 | } |
| 1279 | if (norm[i] > 1.0f) { |
| 1280 | norm[i] = 1.0f; |
| 1281 | } |
| 1282 | } |
| 1283 | } |
| 1284 | factor = 32767.0f; |
| 1285 | if (supportsAlpha) { |
| 1286 | alp = (rgb>>24) & 0xff; |
| 1287 | sdata[numColorComponents] = |
| 1288 | (short) (alp * (32767.0f / 255.0f) + 0.5f); |
| 1289 | if (isAlphaPremultiplied) { |
| 1290 | factor *= alp * (1.0f / 255.0f); |
| 1291 | } |
| 1292 | } |
| 1293 | for (int i = 0; i < numColorComponents; i++) { |
| 1294 | sdata[i] = (short) (norm[i] * factor + 0.5f); |
| 1295 | } |
| 1296 | } |
| 1297 | return sdata; |
| 1298 | } |
| 1299 | case DataBuffer.TYPE_FLOAT: |
| 1300 | { |
| 1301 | float fdata[]; |
| 1302 | if (pixel == null) { |
| 1303 | fdata = new float[numComponents]; |
| 1304 | } else { |
| 1305 | fdata = (float[])pixel; |
| 1306 | } |
| 1307 | float factor; |
| 1308 | if (is_sRGB_stdScale || is_LinearRGB_stdScale) { |
| 1309 | if (is_LinearRGB_stdScale) { |
| 1310 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1311 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1312 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1313 | factor = 1.0f / 65535.0f; |
| 1314 | } else { |
| 1315 | factor = 1.0f / 255.0f; |
| 1316 | } |
| 1317 | if (supportsAlpha) { |
| 1318 | alp = (rgb>>24) & 0xff; |
| 1319 | fdata[3] = alp * (1.0f / 255.0f); |
| 1320 | if (isAlphaPremultiplied) { |
| 1321 | factor *= fdata[3]; |
| 1322 | } |
| 1323 | } |
| 1324 | fdata[0] = red * factor; |
| 1325 | fdata[1] = grn * factor; |
| 1326 | fdata[2] = blu * factor; |
| 1327 | } else if (is_LinearGray_stdScale) { |
| 1328 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1329 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1330 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1331 | fdata[0] = ((0.2125f * red) + |
| 1332 | (0.7154f * grn) + |
| 1333 | (0.0721f * blu)) / 65535.0f; |
| 1334 | if (supportsAlpha) { |
| 1335 | alp = (rgb>>24) & 0xff; |
| 1336 | fdata[1] = alp * (1.0f / 255.0f); |
| 1337 | if (isAlphaPremultiplied) { |
| 1338 | fdata[0] *= fdata[1]; |
| 1339 | } |
| 1340 | } |
| 1341 | } else if (is_ICCGray_stdScale) { |
| 1342 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1343 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1344 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1345 | int gray = (int) ((0.2125f * red) + |
| 1346 | (0.7154f * grn) + |
| 1347 | (0.0721f * blu) + 0.5f); |
| 1348 | fdata[0] = (fromLinearGray16ToOtherGray16LUT[gray] & |
| 1349 | 0xffff) / 65535.0f; |
| 1350 | if (supportsAlpha) { |
| 1351 | alp = (rgb>>24) & 0xff; |
| 1352 | fdata[1] = alp * (1.0f / 255.0f); |
| 1353 | if (isAlphaPremultiplied) { |
| 1354 | fdata[0] *= fdata[1]; |
| 1355 | } |
| 1356 | } |
| 1357 | } else { |
| 1358 | float norm[] = new float[3]; |
| 1359 | factor = 1.0f / 255.0f; |
| 1360 | norm[0] = red * factor; |
| 1361 | norm[1] = grn * factor; |
| 1362 | norm[2] = blu * factor; |
| 1363 | norm = colorSpace.fromRGB(norm); |
| 1364 | if (supportsAlpha) { |
| 1365 | alp = (rgb>>24) & 0xff; |
| 1366 | fdata[numColorComponents] = alp * factor; |
| 1367 | if (isAlphaPremultiplied) { |
| 1368 | factor *= alp; |
| 1369 | for (int i = 0; i < numColorComponents; i++) { |
| 1370 | norm[i] *= factor; |
| 1371 | } |
| 1372 | } |
| 1373 | } |
| 1374 | for (int i = 0; i < numColorComponents; i++) { |
| 1375 | fdata[i] = norm[i]; |
| 1376 | } |
| 1377 | } |
| 1378 | return fdata; |
| 1379 | } |
| 1380 | case DataBuffer.TYPE_DOUBLE: |
| 1381 | { |
| 1382 | double ddata[]; |
| 1383 | if (pixel == null) { |
| 1384 | ddata = new double[numComponents]; |
| 1385 | } else { |
| 1386 | ddata = (double[])pixel; |
| 1387 | } |
| 1388 | if (is_sRGB_stdScale || is_LinearRGB_stdScale) { |
| 1389 | double factor; |
| 1390 | if (is_LinearRGB_stdScale) { |
| 1391 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1392 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1393 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1394 | factor = 1.0 / 65535.0; |
| 1395 | } else { |
| 1396 | factor = 1.0 / 255.0; |
| 1397 | } |
| 1398 | if (supportsAlpha) { |
| 1399 | alp = (rgb>>24) & 0xff; |
| 1400 | ddata[3] = alp * (1.0 / 255.0); |
| 1401 | if (isAlphaPremultiplied) { |
| 1402 | factor *= ddata[3]; |
| 1403 | } |
| 1404 | } |
| 1405 | ddata[0] = red * factor; |
| 1406 | ddata[1] = grn * factor; |
| 1407 | ddata[2] = blu * factor; |
| 1408 | } else if (is_LinearGray_stdScale) { |
| 1409 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1410 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1411 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1412 | ddata[0] = ((0.2125 * red) + |
| 1413 | (0.7154 * grn) + |
| 1414 | (0.0721 * blu)) / 65535.0; |
| 1415 | if (supportsAlpha) { |
| 1416 | alp = (rgb>>24) & 0xff; |
| 1417 | ddata[1] = alp * (1.0 / 255.0); |
| 1418 | if (isAlphaPremultiplied) { |
| 1419 | ddata[0] *= ddata[1]; |
| 1420 | } |
| 1421 | } |
| 1422 | } else if (is_ICCGray_stdScale) { |
| 1423 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1424 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1425 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1426 | int gray = (int) ((0.2125f * red) + |
| 1427 | (0.7154f * grn) + |
| 1428 | (0.0721f * blu) + 0.5f); |
| 1429 | ddata[0] = (fromLinearGray16ToOtherGray16LUT[gray] & |
| 1430 | 0xffff) / 65535.0; |
| 1431 | if (supportsAlpha) { |
| 1432 | alp = (rgb>>24) & 0xff; |
| 1433 | ddata[1] = alp * (1.0 / 255.0); |
| 1434 | if (isAlphaPremultiplied) { |
| 1435 | ddata[0] *= ddata[1]; |
| 1436 | } |
| 1437 | } |
| 1438 | } else { |
| 1439 | float factor = 1.0f / 255.0f; |
| 1440 | float norm[] = new float[3]; |
| 1441 | norm[0] = red * factor; |
| 1442 | norm[1] = grn * factor; |
| 1443 | norm[2] = blu * factor; |
| 1444 | norm = colorSpace.fromRGB(norm); |
| 1445 | if (supportsAlpha) { |
| 1446 | alp = (rgb>>24) & 0xff; |
| 1447 | ddata[numColorComponents] = alp * (1.0 / 255.0); |
| 1448 | if (isAlphaPremultiplied) { |
| 1449 | factor *= alp; |
| 1450 | for (int i = 0; i < numColorComponents; i++) { |
| 1451 | norm[i] *= factor; |
| 1452 | } |
| 1453 | } |
| 1454 | } |
| 1455 | for (int i = 0; i < numColorComponents; i++) { |
| 1456 | ddata[i] = norm[i]; |
| 1457 | } |
| 1458 | } |
| 1459 | return ddata; |
| 1460 | } |
| 1461 | } |
| 1462 | } |
| 1463 | |
| 1464 | // Handle BYTE, USHORT, & INT here |
| 1465 | //REMIND: maybe more efficient not to use int array for |
| 1466 | //DataBuffer.TYPE_USHORT and DataBuffer.TYPE_INT |
| 1467 | int intpixel[]; |
| 1468 | if (transferType == DataBuffer.TYPE_INT && |
| 1469 | pixel != null) { |
| 1470 | intpixel = (int[])pixel; |
| 1471 | } else { |
| 1472 | intpixel = new int[numComponents]; |
| 1473 | } |
| 1474 | |
| 1475 | if (is_sRGB_stdScale || is_LinearRGB_stdScale) { |
| 1476 | int precision; |
| 1477 | float factor; |
| 1478 | if (is_LinearRGB_stdScale) { |
| 1479 | if (transferType == DataBuffer.TYPE_BYTE) { |
| 1480 | red = fromsRGB8LUT8[red] & 0xff; |
| 1481 | grn = fromsRGB8LUT8[grn] & 0xff; |
| 1482 | blu = fromsRGB8LUT8[blu] & 0xff; |
| 1483 | precision = 8; |
| 1484 | factor = 1.0f / 255.0f; |
| 1485 | } else { |
| 1486 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1487 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1488 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1489 | precision = 16; |
| 1490 | factor = 1.0f / 65535.0f; |
| 1491 | } |
| 1492 | } else { |
| 1493 | precision = 8; |
| 1494 | factor = 1.0f / 255.0f; |
| 1495 | } |
| 1496 | if (supportsAlpha) { |
| 1497 | alp = (rgb>>24)&0xff; |
| 1498 | if (nBits[3] == 8) { |
| 1499 | intpixel[3] = alp; |
| 1500 | } |
| 1501 | else { |
| 1502 | intpixel[3] = (int) |
| 1503 | (alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1) + 0.5f); |
| 1504 | } |
| 1505 | if (isAlphaPremultiplied) { |
| 1506 | factor *= (alp * (1.0f / 255.0f)); |
| 1507 | precision = -1; // force component calculations below |
| 1508 | } |
| 1509 | } |
| 1510 | if (nBits[0] == precision) { |
| 1511 | intpixel[0] = red; |
| 1512 | } |
| 1513 | else { |
| 1514 | intpixel[0] = (int) (red * factor * ((1<<nBits[0]) - 1) + 0.5f); |
| 1515 | } |
| 1516 | if (nBits[1] == precision) { |
| 1517 | intpixel[1] = (int)(grn); |
| 1518 | } |
| 1519 | else { |
| 1520 | intpixel[1] = (int) (grn * factor * ((1<<nBits[1]) - 1) + 0.5f); |
| 1521 | } |
| 1522 | if (nBits[2] == precision) { |
| 1523 | intpixel[2] = (int)(blu); |
| 1524 | } |
| 1525 | else { |
| 1526 | intpixel[2] = (int) (blu * factor * ((1<<nBits[2]) - 1) + 0.5f); |
| 1527 | } |
| 1528 | } else if (is_LinearGray_stdScale) { |
| 1529 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1530 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1531 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1532 | float gray = ((0.2125f * red) + |
| 1533 | (0.7154f * grn) + |
| 1534 | (0.0721f * blu)) / 65535.0f; |
| 1535 | if (supportsAlpha) { |
| 1536 | alp = (rgb>>24) & 0xff; |
| 1537 | if (nBits[1] == 8) { |
| 1538 | intpixel[1] = alp; |
| 1539 | } else { |
| 1540 | intpixel[1] = (int) (alp * (1.0f / 255.0f) * |
| 1541 | ((1 << nBits[1]) - 1) + 0.5f); |
| 1542 | } |
| 1543 | if (isAlphaPremultiplied) { |
| 1544 | gray *= (alp * (1.0f / 255.0f)); |
| 1545 | } |
| 1546 | } |
| 1547 | intpixel[0] = (int) (gray * ((1 << nBits[0]) - 1) + 0.5f); |
| 1548 | } else if (is_ICCGray_stdScale) { |
| 1549 | red = fromsRGB8LUT16[red] & 0xffff; |
| 1550 | grn = fromsRGB8LUT16[grn] & 0xffff; |
| 1551 | blu = fromsRGB8LUT16[blu] & 0xffff; |
| 1552 | int gray16 = (int) ((0.2125f * red) + |
| 1553 | (0.7154f * grn) + |
| 1554 | (0.0721f * blu) + 0.5f); |
| 1555 | float gray = (fromLinearGray16ToOtherGray16LUT[gray16] & |
| 1556 | 0xffff) / 65535.0f; |
| 1557 | if (supportsAlpha) { |
| 1558 | alp = (rgb>>24) & 0xff; |
| 1559 | if (nBits[1] == 8) { |
| 1560 | intpixel[1] = alp; |
| 1561 | } else { |
| 1562 | intpixel[1] = (int) (alp * (1.0f / 255.0f) * |
| 1563 | ((1 << nBits[1]) - 1) + 0.5f); |
| 1564 | } |
| 1565 | if (isAlphaPremultiplied) { |
| 1566 | gray *= (alp * (1.0f / 255.0f)); |
| 1567 | } |
| 1568 | } |
| 1569 | intpixel[0] = (int) (gray * ((1 << nBits[0]) - 1) + 0.5f); |
| 1570 | } else { |
| 1571 | // Need to convert the color |
| 1572 | float[] norm = new float[3]; |
| 1573 | float factor = 1.0f / 255.0f; |
| 1574 | norm[0] = red * factor; |
| 1575 | norm[1] = grn * factor; |
| 1576 | norm[2] = blu * factor; |
| 1577 | norm = colorSpace.fromRGB(norm); |
| 1578 | if (nonStdScale) { |
| 1579 | for (int i = 0; i < numColorComponents; i++) { |
| 1580 | norm[i] = (norm[i] - compOffset[i]) * |
| 1581 | compScale[i]; |
| 1582 | // REMIND: need to analyze whether this |
| 1583 | // clamping is necessary |
| 1584 | if (norm[i] < 0.0f) { |
| 1585 | norm[i] = 0.0f; |
| 1586 | } |
| 1587 | if (norm[i] > 1.0f) { |
| 1588 | norm[i] = 1.0f; |
| 1589 | } |
| 1590 | } |
| 1591 | } |
| 1592 | if (supportsAlpha) { |
| 1593 | alp = (rgb>>24) & 0xff; |
| 1594 | if (nBits[numColorComponents] == 8) { |
| 1595 | intpixel[numColorComponents] = alp; |
| 1596 | } |
| 1597 | else { |
| 1598 | intpixel[numColorComponents] = |
| 1599 | (int) (alp * factor * |
| 1600 | ((1<<nBits[numColorComponents]) - 1) + 0.5f); |
| 1601 | } |
| 1602 | if (isAlphaPremultiplied) { |
| 1603 | factor *= alp; |
| 1604 | for (int i = 0; i < numColorComponents; i++) { |
| 1605 | norm[i] *= factor; |
| 1606 | } |
| 1607 | } |
| 1608 | } |
| 1609 | for (int i = 0; i < numColorComponents; i++) { |
| 1610 | intpixel[i] = (int) (norm[i] * ((1<<nBits[i]) - 1) + 0.5f); |
| 1611 | } |
| 1612 | } |
| 1613 | |
| 1614 | switch (transferType) { |
| 1615 | case DataBuffer.TYPE_BYTE: { |
| 1616 | byte bdata[]; |
| 1617 | if (pixel == null) { |
| 1618 | bdata = new byte[numComponents]; |
| 1619 | } else { |
| 1620 | bdata = (byte[])pixel; |
| 1621 | } |
| 1622 | for (int i = 0; i < numComponents; i++) { |
| 1623 | bdata[i] = (byte)(0xff&intpixel[i]); |
| 1624 | } |
| 1625 | return bdata; |
| 1626 | } |
| 1627 | case DataBuffer.TYPE_USHORT:{ |
| 1628 | short sdata[]; |
| 1629 | if (pixel == null) { |
| 1630 | sdata = new short[numComponents]; |
| 1631 | } else { |
| 1632 | sdata = (short[])pixel; |
| 1633 | } |
| 1634 | for (int i = 0; i < numComponents; i++) { |
| 1635 | sdata[i] = (short)(intpixel[i]&0xffff); |
| 1636 | } |
| 1637 | return sdata; |
| 1638 | } |
| 1639 | case DataBuffer.TYPE_INT: |
| 1640 | if (maxBits > 23) { |
| 1641 | // fix 4412670 - for components of 24 or more bits |
| 1642 | // some calculations done above with float precision |
| 1643 | // may lose enough precision that the integer result |
| 1644 | // overflows nBits, so we need to clamp. |
| 1645 | for (int i = 0; i < numComponents; i++) { |
| 1646 | if (intpixel[i] > ((1<<nBits[i]) - 1)) { |
| 1647 | intpixel[i] = (1<<nBits[i]) - 1; |
| 1648 | } |
| 1649 | } |
| 1650 | } |
| 1651 | return intpixel; |
| 1652 | } |
| 1653 | throw new IllegalArgumentException("This method has not been "+ |
| 1654 | "implemented for transferType " + transferType); |
| 1655 | } |
| 1656 | |
| 1657 | /** Returns an array of unnormalized color/alpha components given a pixel |
| 1658 | * in this <CODE>ColorModel</CODE>. |
| 1659 | * An IllegalArgumentException is thrown if the component value for this |
| 1660 | * <CODE>ColorModel</CODE> is not conveniently representable in the |
| 1661 | * unnormalized form. Color/alpha components are stored |
| 1662 | * in the <CODE>components</CODE> array starting at <CODE>offset</CODE> |
| 1663 | * (even if the array is allocated by this method). |
| 1664 | * |
| 1665 | * @param pixel The pixel value specified as an integer. |
| 1666 | * @param components An integer array in which to store the unnormalized |
| 1667 | * color/alpha components. If the <CODE>components</CODE> array is null, |
| 1668 | * a new array is allocated. |
| 1669 | * @param offset An offset into the <CODE>components</CODE> array. |
| 1670 | * |
| 1671 | * @return The components array. |
| 1672 | * |
| 1673 | * @throws IllegalArgumentException If there is more than one |
| 1674 | * component in this <CODE>ColorModel</CODE>. |
| 1675 | * @throws IllegalArgumentException If this |
| 1676 | * <CODE>ColorModel</CODE> does not support the unnormalized form |
| 1677 | * @throws ArrayIndexOutOfBoundsException If the <CODE>components</CODE> |
| 1678 | * array is not null and is not large enough to hold all the color and |
| 1679 | * alpha components (starting at offset). |
| 1680 | */ |
| 1681 | public int[] getComponents(int pixel, int[] components, int offset) { |
| 1682 | if (numComponents > 1) { |
| 1683 | throw new |
| 1684 | IllegalArgumentException("More than one component per pixel"); |
| 1685 | } |
| 1686 | if (needScaleInit) { |
| 1687 | initScale(); |
| 1688 | } |
| 1689 | if (noUnnorm) { |
| 1690 | throw new |
| 1691 | IllegalArgumentException( |
| 1692 | "This ColorModel does not support the unnormalized form"); |
| 1693 | } |
| 1694 | if (components == null) { |
| 1695 | components = new int[offset+1]; |
| 1696 | } |
| 1697 | |
| 1698 | components[offset+0] = (pixel & ((1<<nBits[0]) - 1)); |
| 1699 | return components; |
| 1700 | } |
| 1701 | |
| 1702 | /** |
| 1703 | * Returns an array of unnormalized color/alpha components given a pixel |
| 1704 | * in this <CODE>ColorModel</CODE>. The pixel value is specified by an |
| 1705 | * array of data elements of type <CODE>transferType</CODE> passed in as |
| 1706 | * an object reference. |
| 1707 | * An IllegalArgumentException is thrown if the component values for this |
| 1708 | * <CODE>ColorModel</CODE> are not conveniently representable in the |
| 1709 | * unnormalized form. |
| 1710 | * Color/alpha components are stored in the <CODE>components</CODE> array |
| 1711 | * starting at <CODE>offset</CODE> (even if the array is allocated by |
| 1712 | * this method). Since <code>ComponentColorModel</code> can be |
| 1713 | * subclassed, subclasses inherit the |
| 1714 | * implementation of this method and if they don't override it then |
| 1715 | * this method might throw an exception if they use an unsupported |
| 1716 | * <code>transferType</code>. |
| 1717 | * |
| 1718 | * @param pixel A pixel value specified by an array of data elements of |
| 1719 | * type <CODE>transferType</CODE>. |
| 1720 | * @param components An integer array in which to store the unnormalized |
| 1721 | * color/alpha components. If the <CODE>components</CODE> array is null, |
| 1722 | * a new array is allocated. |
| 1723 | * @param offset An offset into the <CODE>components</CODE> array. |
| 1724 | * |
| 1725 | * @return The <CODE>components</CODE> array. |
| 1726 | * |
| 1727 | * @throws IllegalArgumentException If this |
| 1728 | * <CODE>ComponentColorModel</CODE> does not support the unnormalized form |
| 1729 | * @throws UnsupportedOperationException in some cases iff the |
| 1730 | * transfer type of this <CODE>ComponentColorModel</CODE> |
| 1731 | * is not one of the following transfer types: |
| 1732 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1733 | * or <CODE>DataBuffer.TYPE_INT</CODE>. |
| 1734 | * @throws ClassCastException If <CODE>pixel</CODE> is not a primitive |
| 1735 | * array of type <CODE>transferType</CODE>. |
| 1736 | * @throws IllegalArgumentException If the <CODE>components</CODE> array is |
| 1737 | * not null and is not large enough to hold all the color and alpha |
| 1738 | * components (starting at offset), or if <CODE>pixel</CODE> is not large |
| 1739 | * enough to hold a pixel value for this ColorModel. |
| 1740 | */ |
| 1741 | public int[] getComponents(Object pixel, int[] components, int offset) { |
| 1742 | int intpixel[]; |
| 1743 | if (needScaleInit) { |
| 1744 | initScale(); |
| 1745 | } |
| 1746 | if (noUnnorm) { |
| 1747 | throw new |
| 1748 | IllegalArgumentException( |
| 1749 | "This ColorModel does not support the unnormalized form"); |
| 1750 | } |
| 1751 | if (pixel instanceof int[]) { |
| 1752 | intpixel = (int[])pixel; |
| 1753 | } else { |
| 1754 | intpixel = DataBuffer.toIntArray(pixel); |
| 1755 | if (intpixel == null) { |
| 1756 | throw new UnsupportedOperationException("This method has not been "+ |
| 1757 | "implemented for transferType " + transferType); |
| 1758 | } |
| 1759 | } |
| 1760 | if (intpixel.length < numComponents) { |
| 1761 | throw new IllegalArgumentException |
| 1762 | ("Length of pixel array < number of components in model"); |
| 1763 | } |
| 1764 | if (components == null) { |
| 1765 | components = new int[offset+numComponents]; |
| 1766 | } |
| 1767 | else if ((components.length-offset) < numComponents) { |
| 1768 | throw new IllegalArgumentException |
| 1769 | ("Length of components array < number of components in model"); |
| 1770 | } |
| 1771 | System.arraycopy(intpixel, 0, components, offset, numComponents); |
| 1772 | |
| 1773 | return components; |
| 1774 | } |
| 1775 | |
| 1776 | /** |
| 1777 | * Returns an array of all of the color/alpha components in unnormalized |
| 1778 | * form, given a normalized component array. Unnormalized components |
| 1779 | * are unsigned integral values between 0 and 2<sup>n</sup> - 1, where |
| 1780 | * n is the number of bits for a particular component. Normalized |
| 1781 | * components are float values between a per component minimum and |
| 1782 | * maximum specified by the <code>ColorSpace</code> object for this |
| 1783 | * <code>ColorModel</code>. An <code>IllegalArgumentException</code> |
| 1784 | * will be thrown if color component values for this |
| 1785 | * <code>ColorModel</code> are not conveniently representable in the |
| 1786 | * unnormalized form. If the |
| 1787 | * <code>components</code> array is <code>null</code>, a new array |
| 1788 | * will be allocated. The <code>components</code> array will |
| 1789 | * be returned. Color/alpha components are stored in the |
| 1790 | * <code>components</code> array starting at <code>offset</code> (even |
| 1791 | * if the array is allocated by this method). An |
| 1792 | * <code>ArrayIndexOutOfBoundsException</code> is thrown if the |
| 1793 | * <code>components</code> array is not <code>null</code> and is not |
| 1794 | * large enough to hold all the color and alpha |
| 1795 | * components (starting at <code>offset</code>). An |
| 1796 | * <code>IllegalArgumentException</code> is thrown if the |
| 1797 | * <code>normComponents</code> array is not large enough to hold |
| 1798 | * all the color and alpha components starting at |
| 1799 | * <code>normOffset</code>. |
| 1800 | * @param normComponents an array containing normalized components |
| 1801 | * @param normOffset the offset into the <code>normComponents</code> |
| 1802 | * array at which to start retrieving normalized components |
| 1803 | * @param components an array that receives the components from |
| 1804 | * <code>normComponents</code> |
| 1805 | * @param offset the index into <code>components</code> at which to |
| 1806 | * begin storing normalized components from |
| 1807 | * <code>normComponents</code> |
| 1808 | * @return an array containing unnormalized color and alpha |
| 1809 | * components. |
| 1810 | * @throws IllegalArgumentException If this |
| 1811 | * <CODE>ComponentColorModel</CODE> does not support the unnormalized form |
| 1812 | * @throws IllegalArgumentException if the length of |
| 1813 | * <code>normComponents</code> minus <code>normOffset</code> |
| 1814 | * is less than <code>numComponents</code> |
| 1815 | */ |
| 1816 | public int[] getUnnormalizedComponents(float[] normComponents, |
| 1817 | int normOffset, |
| 1818 | int[] components, int offset) { |
| 1819 | if (needScaleInit) { |
| 1820 | initScale(); |
| 1821 | } |
| 1822 | if (noUnnorm) { |
| 1823 | throw new |
| 1824 | IllegalArgumentException( |
| 1825 | "This ColorModel does not support the unnormalized form"); |
| 1826 | } |
| 1827 | return super.getUnnormalizedComponents(normComponents, normOffset, |
| 1828 | components, offset); |
| 1829 | } |
| 1830 | |
| 1831 | /** |
| 1832 | * Returns an array of all of the color/alpha components in normalized |
| 1833 | * form, given an unnormalized component array. Unnormalized components |
| 1834 | * are unsigned integral values between 0 and 2<sup>n</sup> - 1, where |
| 1835 | * n is the number of bits for a particular component. Normalized |
| 1836 | * components are float values between a per component minimum and |
| 1837 | * maximum specified by the <code>ColorSpace</code> object for this |
| 1838 | * <code>ColorModel</code>. An <code>IllegalArgumentException</code> |
| 1839 | * will be thrown if color component values for this |
| 1840 | * <code>ColorModel</code> are not conveniently representable in the |
| 1841 | * unnormalized form. If the |
| 1842 | * <code>normComponents</code> array is <code>null</code>, a new array |
| 1843 | * will be allocated. The <code>normComponents</code> array |
| 1844 | * will be returned. Color/alpha components are stored in the |
| 1845 | * <code>normComponents</code> array starting at |
| 1846 | * <code>normOffset</code> (even if the array is allocated by this |
| 1847 | * method). An <code>ArrayIndexOutOfBoundsException</code> is thrown |
| 1848 | * if the <code>normComponents</code> array is not <code>null</code> |
| 1849 | * and is not large enough to hold all the color and alpha components |
| 1850 | * (starting at <code>normOffset</code>). An |
| 1851 | * <code>IllegalArgumentException</code> is thrown if the |
| 1852 | * <code>components</code> array is not large enough to hold all the |
| 1853 | * color and alpha components starting at <code>offset</code>. |
| 1854 | * @param components an array containing unnormalized components |
| 1855 | * @param offset the offset into the <code>components</code> array at |
| 1856 | * which to start retrieving unnormalized components |
| 1857 | * @param normComponents an array that receives the normalized components |
| 1858 | * @param normOffset the index into <code>normComponents</code> at |
| 1859 | * which to begin storing normalized components |
| 1860 | * @return an array containing normalized color and alpha |
| 1861 | * components. |
| 1862 | * @throws IllegalArgumentException If this |
| 1863 | * <CODE>ComponentColorModel</CODE> does not support the unnormalized form |
| 1864 | */ |
| 1865 | public float[] getNormalizedComponents(int[] components, int offset, |
| 1866 | float[] normComponents, |
| 1867 | int normOffset) { |
| 1868 | if (needScaleInit) { |
| 1869 | initScale(); |
| 1870 | } |
| 1871 | if (noUnnorm) { |
| 1872 | throw new |
| 1873 | IllegalArgumentException( |
| 1874 | "This ColorModel does not support the unnormalized form"); |
| 1875 | } |
| 1876 | return super.getNormalizedComponents(components, offset, |
| 1877 | normComponents, normOffset); |
| 1878 | } |
| 1879 | |
| 1880 | /** |
| 1881 | * Returns a pixel value represented as an int in this <CODE>ColorModel</CODE>, |
| 1882 | * given an array of unnormalized color/alpha components. |
| 1883 | * |
| 1884 | * @param components An array of unnormalized color/alpha components. |
| 1885 | * @param offset An offset into the <CODE>components</CODE> array. |
| 1886 | * |
| 1887 | * @return A pixel value represented as an int. |
| 1888 | * |
| 1889 | * @throws IllegalArgumentException If there is more than one component |
| 1890 | * in this <CODE>ColorModel</CODE>. |
| 1891 | * @throws IllegalArgumentException If this |
| 1892 | * <CODE>ComponentColorModel</CODE> does not support the unnormalized form |
| 1893 | */ |
| 1894 | public int getDataElement(int[] components, int offset) { |
| 1895 | if (needScaleInit) { |
| 1896 | initScale(); |
| 1897 | } |
| 1898 | if (numComponents == 1) { |
| 1899 | if (noUnnorm) { |
| 1900 | throw new |
| 1901 | IllegalArgumentException( |
| 1902 | "This ColorModel does not support the unnormalized form"); |
| 1903 | } |
| 1904 | return components[offset+0]; |
| 1905 | } |
| 1906 | throw new IllegalArgumentException("This model returns "+ |
| 1907 | numComponents+ |
| 1908 | " elements in the pixel array."); |
| 1909 | } |
| 1910 | |
| 1911 | /** |
| 1912 | * Returns a data element array representation of a pixel in this |
| 1913 | * <CODE>ColorModel</CODE>, given an array of unnormalized color/alpha |
| 1914 | * components. This array can then be passed to the <CODE>setDataElements</CODE> |
| 1915 | * method of a <CODE>WritableRaster</CODE> object. |
| 1916 | * |
| 1917 | * @param components An array of unnormalized color/alpha components. |
| 1918 | * @param offset The integer offset into the <CODE>components</CODE> array. |
| 1919 | * @param obj The object in which to store the data element array |
| 1920 | * representation of the pixel. If <CODE>obj</CODE> variable is null, |
| 1921 | * a new array is allocated. If <CODE>obj</CODE> is not null, it must |
| 1922 | * be a primitive array of type <CODE>transferType</CODE>. An |
| 1923 | * <CODE>ArrayIndexOutOfBoundsException</CODE> is thrown if |
| 1924 | * <CODE>obj</CODE> is not large enough to hold a pixel value |
| 1925 | * for this <CODE>ColorModel</CODE>. Since |
| 1926 | * <code>ComponentColorModel</code> can be subclassed, subclasses |
| 1927 | * inherit the implementation of this method and if they don't |
| 1928 | * override it then they throw an exception if they use an |
| 1929 | * unsupported <code>transferType</code>. |
| 1930 | * |
| 1931 | * @return The data element array representation of a pixel |
| 1932 | * in this <CODE>ColorModel</CODE>. |
| 1933 | * |
| 1934 | * @throws IllegalArgumentException If the components array |
| 1935 | * is not large enough to hold all the color and alpha components |
| 1936 | * (starting at offset). |
| 1937 | * @throws ClassCastException If <CODE>obj</CODE> is not null and is not a |
| 1938 | * primitive array of type <CODE>transferType</CODE>. |
| 1939 | * @throws ArrayIndexOutOfBoundsException If <CODE>obj</CODE> is not large |
| 1940 | * enough to hold a pixel value for this <CODE>ColorModel</CODE>. |
| 1941 | * @throws IllegalArgumentException If this |
| 1942 | * <CODE>ComponentColorModel</CODE> does not support the unnormalized form |
| 1943 | * @throws UnsupportedOperationException If the transfer type of |
| 1944 | * this <CODE>ComponentColorModel</CODE> |
| 1945 | * is not one of the following transfer types: |
| 1946 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 1947 | * or <CODE>DataBuffer.TYPE_INT</CODE>. |
| 1948 | * |
| 1949 | * @see WritableRaster#setDataElements |
| 1950 | * @see SampleModel#setDataElements |
| 1951 | */ |
| 1952 | public Object getDataElements(int[] components, int offset, Object obj) { |
| 1953 | if (needScaleInit) { |
| 1954 | initScale(); |
| 1955 | } |
| 1956 | if (noUnnorm) { |
| 1957 | throw new |
| 1958 | IllegalArgumentException( |
| 1959 | "This ColorModel does not support the unnormalized form"); |
| 1960 | } |
| 1961 | if ((components.length-offset) < numComponents) { |
| 1962 | throw new IllegalArgumentException("Component array too small"+ |
| 1963 | " (should be "+numComponents); |
| 1964 | } |
| 1965 | switch(transferType) { |
| 1966 | case DataBuffer.TYPE_INT: |
| 1967 | { |
| 1968 | int[] pixel; |
| 1969 | if (obj == null) { |
| 1970 | pixel = new int[numComponents]; |
| 1971 | } |
| 1972 | else { |
| 1973 | pixel = (int[]) obj; |
| 1974 | } |
| 1975 | System.arraycopy(components, offset, pixel, 0, |
| 1976 | numComponents); |
| 1977 | return pixel; |
| 1978 | } |
| 1979 | |
| 1980 | case DataBuffer.TYPE_BYTE: |
| 1981 | { |
| 1982 | byte[] pixel; |
| 1983 | if (obj == null) { |
| 1984 | pixel = new byte[numComponents]; |
| 1985 | } |
| 1986 | else { |
| 1987 | pixel = (byte[]) obj; |
| 1988 | } |
| 1989 | for (int i=0; i < numComponents; i++) { |
| 1990 | pixel[i] = (byte) (components[offset+i]&0xff); |
| 1991 | } |
| 1992 | return pixel; |
| 1993 | } |
| 1994 | |
| 1995 | case DataBuffer.TYPE_USHORT: |
| 1996 | { |
| 1997 | short[] pixel; |
| 1998 | if (obj == null) { |
| 1999 | pixel = new short[numComponents]; |
| 2000 | } |
| 2001 | else { |
| 2002 | pixel = (short[]) obj; |
| 2003 | } |
| 2004 | for (int i=0; i < numComponents; i++) { |
| 2005 | pixel[i] = (short) (components[offset+i]&0xffff); |
| 2006 | } |
| 2007 | return pixel; |
| 2008 | } |
| 2009 | |
| 2010 | default: |
| 2011 | throw new UnsupportedOperationException("This method has not been "+ |
| 2012 | "implemented for transferType " + |
| 2013 | transferType); |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | /** |
| 2018 | * Returns a pixel value represented as an <code>int</code> in this |
| 2019 | * <code>ColorModel</code>, given an array of normalized color/alpha |
| 2020 | * components. This method will throw an |
| 2021 | * <code>IllegalArgumentException</code> if pixel values for this |
| 2022 | * <code>ColorModel</code> are not conveniently representable as a |
| 2023 | * single <code>int</code>. An |
| 2024 | * <code>ArrayIndexOutOfBoundsException</code> is thrown if the |
| 2025 | * <code>normComponents</code> array is not large enough to hold all the |
| 2026 | * color and alpha components (starting at <code>normOffset</code>). |
| 2027 | * @param normComponents an array of normalized color and alpha |
| 2028 | * components |
| 2029 | * @param normOffset the index into <code>normComponents</code> at which to |
| 2030 | * begin retrieving the color and alpha components |
| 2031 | * @return an <code>int</code> pixel value in this |
| 2032 | * <code>ColorModel</code> corresponding to the specified components. |
| 2033 | * @throws IllegalArgumentException if |
| 2034 | * pixel values for this <code>ColorModel</code> are not |
| 2035 | * conveniently representable as a single <code>int</code> |
| 2036 | * @throws ArrayIndexOutOfBoundsException if |
| 2037 | * the <code>normComponents</code> array is not large enough to |
| 2038 | * hold all of the color and alpha components starting at |
| 2039 | * <code>normOffset</code> |
| 2040 | * @since 1.4 |
| 2041 | */ |
| 2042 | public int getDataElement(float[] normComponents, int normOffset) { |
| 2043 | if (numComponents > 1) { |
| 2044 | throw new |
| 2045 | IllegalArgumentException("More than one component per pixel"); |
| 2046 | } |
| 2047 | if (signed) { |
| 2048 | throw new |
| 2049 | IllegalArgumentException("Component value is signed"); |
| 2050 | } |
| 2051 | if (needScaleInit) { |
| 2052 | initScale(); |
| 2053 | } |
| 2054 | Object pixel = getDataElements(normComponents, normOffset, null); |
| 2055 | switch (transferType) { |
| 2056 | case DataBuffer.TYPE_BYTE: |
| 2057 | { |
| 2058 | byte bpixel[] = (byte[]) pixel; |
| 2059 | return bpixel[0] & 0xff; |
| 2060 | } |
| 2061 | case DataBuffer.TYPE_USHORT: |
| 2062 | { |
| 2063 | short[] uspixel = (short[]) pixel; |
| 2064 | return uspixel[0] & 0xffff; |
| 2065 | } |
| 2066 | case DataBuffer.TYPE_INT: |
| 2067 | { |
| 2068 | int[] ipixel = (int[]) pixel; |
| 2069 | return ipixel[0]; |
| 2070 | } |
| 2071 | default: |
| 2072 | throw new UnsupportedOperationException("This method has not been " |
| 2073 | + "implemented for transferType " + transferType); |
| 2074 | } |
| 2075 | } |
| 2076 | |
| 2077 | /** |
| 2078 | * Returns a data element array representation of a pixel in this |
| 2079 | * <code>ColorModel</code>, given an array of normalized color/alpha |
| 2080 | * components. This array can then be passed to the |
| 2081 | * <code>setDataElements</code> method of a <code>WritableRaster</code> |
| 2082 | * object. An <code>ArrayIndexOutOfBoundsException</code> is thrown |
| 2083 | * if the <code>normComponents</code> array is not large enough to hold |
| 2084 | * all the color and alpha components (starting at |
| 2085 | * <code>normOffset</code>). If the <code>obj</code> variable is |
| 2086 | * <code>null</code>, a new array will be allocated. If |
| 2087 | * <code>obj</code> is not <code>null</code>, it must be a primitive |
| 2088 | * array of type transferType; otherwise, a |
| 2089 | * <code>ClassCastException</code> is thrown. An |
| 2090 | * <code>ArrayIndexOutOfBoundsException</code> is thrown if |
| 2091 | * <code>obj</code> is not large enough to hold a pixel value for this |
| 2092 | * <code>ColorModel</code>. |
| 2093 | * @param normComponents an array of normalized color and alpha |
| 2094 | * components |
| 2095 | * @param normOffset the index into <code>normComponents</code> at which to |
| 2096 | * begin retrieving color and alpha components |
| 2097 | * @param obj a primitive data array to hold the returned pixel |
| 2098 | * @return an <code>Object</code> which is a primitive data array |
| 2099 | * representation of a pixel |
| 2100 | * @throws ClassCastException if <code>obj</code> |
| 2101 | * is not a primitive array of type <code>transferType</code> |
| 2102 | * @throws ArrayIndexOutOfBoundsException if |
| 2103 | * <code>obj</code> is not large enough to hold a pixel value |
| 2104 | * for this <code>ColorModel</code> or the <code>normComponents</code> |
| 2105 | * array is not large enough to hold all of the color and alpha |
| 2106 | * components starting at <code>normOffset</code> |
| 2107 | * @see WritableRaster#setDataElements |
| 2108 | * @see SampleModel#setDataElements |
| 2109 | * @since 1.4 |
| 2110 | */ |
| 2111 | public Object getDataElements(float[] normComponents, int normOffset, |
| 2112 | Object obj) { |
| 2113 | boolean needAlpha = supportsAlpha && isAlphaPremultiplied; |
| 2114 | float[] stdNormComponents; |
| 2115 | if (needScaleInit) { |
| 2116 | initScale(); |
| 2117 | } |
| 2118 | if (nonStdScale) { |
| 2119 | stdNormComponents = new float[numComponents]; |
| 2120 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2121 | c++, nc++) { |
| 2122 | stdNormComponents[c] = (normComponents[nc] - compOffset[c]) * |
| 2123 | compScale[c]; |
| 2124 | // REMIND: need to analyze whether this |
| 2125 | // clamping is necessary |
| 2126 | if (stdNormComponents[c] < 0.0f) { |
| 2127 | stdNormComponents[c] = 0.0f; |
| 2128 | } |
| 2129 | if (stdNormComponents[c] > 1.0f) { |
| 2130 | stdNormComponents[c] = 1.0f; |
| 2131 | } |
| 2132 | } |
| 2133 | if (supportsAlpha) { |
| 2134 | stdNormComponents[numColorComponents] = |
| 2135 | normComponents[numColorComponents + normOffset]; |
| 2136 | } |
| 2137 | normOffset = 0; |
| 2138 | } else { |
| 2139 | stdNormComponents = normComponents; |
| 2140 | } |
| 2141 | switch (transferType) { |
| 2142 | case DataBuffer.TYPE_BYTE: |
| 2143 | byte[] bpixel; |
| 2144 | if (obj == null) { |
| 2145 | bpixel = new byte[numComponents]; |
| 2146 | } else { |
| 2147 | bpixel = (byte[]) obj; |
| 2148 | } |
| 2149 | if (needAlpha) { |
| 2150 | float alpha = |
| 2151 | stdNormComponents[numColorComponents + normOffset]; |
| 2152 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2153 | c++, nc++) { |
| 2154 | bpixel[c] = (byte) ((stdNormComponents[nc] * alpha) * |
| 2155 | ((float) ((1 << nBits[c]) - 1)) + 0.5f); |
| 2156 | } |
| 2157 | bpixel[numColorComponents] = |
| 2158 | (byte) (alpha * |
| 2159 | ((float) ((1 << nBits[numColorComponents]) - 1)) + |
| 2160 | 0.5f); |
| 2161 | } else { |
| 2162 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2163 | c++, nc++) { |
| 2164 | bpixel[c] = (byte) (stdNormComponents[nc] * |
| 2165 | ((float) ((1 << nBits[c]) - 1)) + 0.5f); |
| 2166 | } |
| 2167 | } |
| 2168 | return bpixel; |
| 2169 | case DataBuffer.TYPE_USHORT: |
| 2170 | short[] uspixel; |
| 2171 | if (obj == null) { |
| 2172 | uspixel = new short[numComponents]; |
| 2173 | } else { |
| 2174 | uspixel = (short[]) obj; |
| 2175 | } |
| 2176 | if (needAlpha) { |
| 2177 | float alpha = |
| 2178 | stdNormComponents[numColorComponents + normOffset]; |
| 2179 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2180 | c++, nc++) { |
| 2181 | uspixel[c] = (short) ((stdNormComponents[nc] * alpha) * |
| 2182 | ((float) ((1 << nBits[c]) - 1)) + |
| 2183 | 0.5f); |
| 2184 | } |
| 2185 | uspixel[numColorComponents] = |
| 2186 | (short) (alpha * |
| 2187 | ((float) ((1 << nBits[numColorComponents]) - 1)) + |
| 2188 | 0.5f); |
| 2189 | } else { |
| 2190 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2191 | c++, nc++) { |
| 2192 | uspixel[c] = (short) (stdNormComponents[nc] * |
| 2193 | ((float) ((1 << nBits[c]) - 1)) + |
| 2194 | 0.5f); |
| 2195 | } |
| 2196 | } |
| 2197 | return uspixel; |
| 2198 | case DataBuffer.TYPE_INT: |
| 2199 | int[] ipixel; |
| 2200 | if (obj == null) { |
| 2201 | ipixel = new int[numComponents]; |
| 2202 | } else { |
| 2203 | ipixel = (int[]) obj; |
| 2204 | } |
| 2205 | if (needAlpha) { |
| 2206 | float alpha = |
| 2207 | stdNormComponents[numColorComponents + normOffset]; |
| 2208 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2209 | c++, nc++) { |
| 2210 | ipixel[c] = (int) ((stdNormComponents[nc] * alpha) * |
| 2211 | ((float) ((1 << nBits[c]) - 1)) + 0.5f); |
| 2212 | } |
| 2213 | ipixel[numColorComponents] = |
| 2214 | (int) (alpha * |
| 2215 | ((float) ((1 << nBits[numColorComponents]) - 1)) + |
| 2216 | 0.5f); |
| 2217 | } else { |
| 2218 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2219 | c++, nc++) { |
| 2220 | ipixel[c] = (int) (stdNormComponents[nc] * |
| 2221 | ((float) ((1 << nBits[c]) - 1)) + 0.5f); |
| 2222 | } |
| 2223 | } |
| 2224 | return ipixel; |
| 2225 | case DataBuffer.TYPE_SHORT: |
| 2226 | short[] spixel; |
| 2227 | if (obj == null) { |
| 2228 | spixel = new short[numComponents]; |
| 2229 | } else { |
| 2230 | spixel = (short[]) obj; |
| 2231 | } |
| 2232 | if (needAlpha) { |
| 2233 | float alpha = |
| 2234 | stdNormComponents[numColorComponents + normOffset]; |
| 2235 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2236 | c++, nc++) { |
| 2237 | spixel[c] = (short) |
| 2238 | (stdNormComponents[nc] * alpha * 32767.0f + 0.5f); |
| 2239 | } |
| 2240 | spixel[numColorComponents] = (short) (alpha * 32767.0f + 0.5f); |
| 2241 | } else { |
| 2242 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2243 | c++, nc++) { |
| 2244 | spixel[c] = (short) |
| 2245 | (stdNormComponents[nc] * 32767.0f + 0.5f); |
| 2246 | } |
| 2247 | } |
| 2248 | return spixel; |
| 2249 | case DataBuffer.TYPE_FLOAT: |
| 2250 | float[] fpixel; |
| 2251 | if (obj == null) { |
| 2252 | fpixel = new float[numComponents]; |
| 2253 | } else { |
| 2254 | fpixel = (float[]) obj; |
| 2255 | } |
| 2256 | if (needAlpha) { |
| 2257 | float alpha = normComponents[numColorComponents + normOffset]; |
| 2258 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2259 | c++, nc++) { |
| 2260 | fpixel[c] = normComponents[nc] * alpha; |
| 2261 | } |
| 2262 | fpixel[numColorComponents] = alpha; |
| 2263 | } else { |
| 2264 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2265 | c++, nc++) { |
| 2266 | fpixel[c] = normComponents[nc]; |
| 2267 | } |
| 2268 | } |
| 2269 | return fpixel; |
| 2270 | case DataBuffer.TYPE_DOUBLE: |
| 2271 | double[] dpixel; |
| 2272 | if (obj == null) { |
| 2273 | dpixel = new double[numComponents]; |
| 2274 | } else { |
| 2275 | dpixel = (double[]) obj; |
| 2276 | } |
| 2277 | if (needAlpha) { |
| 2278 | double alpha = |
| 2279 | (double) (normComponents[numColorComponents + normOffset]); |
| 2280 | for (int c = 0, nc = normOffset; c < numColorComponents; |
| 2281 | c++, nc++) { |
| 2282 | dpixel[c] = normComponents[nc] * alpha; |
| 2283 | } |
| 2284 | dpixel[numColorComponents] = alpha; |
| 2285 | } else { |
| 2286 | for (int c = 0, nc = normOffset; c < numComponents; |
| 2287 | c++, nc++) { |
| 2288 | dpixel[c] = (double) normComponents[nc]; |
| 2289 | } |
| 2290 | } |
| 2291 | return dpixel; |
| 2292 | default: |
| 2293 | throw new UnsupportedOperationException("This method has not been "+ |
| 2294 | "implemented for transferType " + |
| 2295 | transferType); |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | /** |
| 2300 | * Returns an array of all of the color/alpha components in normalized |
| 2301 | * form, given a pixel in this <code>ColorModel</code>. The pixel |
| 2302 | * value is specified by an array of data elements of type transferType |
| 2303 | * passed in as an object reference. If pixel is not a primitive array |
| 2304 | * of type transferType, a <code>ClassCastException</code> is thrown. |
| 2305 | * An <code>ArrayIndexOutOfBoundsException</code> is thrown if |
| 2306 | * <code>pixel</code> is not large enough to hold a pixel value for this |
| 2307 | * <code>ColorModel</code>. |
| 2308 | * Normalized components are float values between a per component minimum |
| 2309 | * and maximum specified by the <code>ColorSpace</code> object for this |
| 2310 | * <code>ColorModel</code>. If the |
| 2311 | * <code>normComponents</code> array is <code>null</code>, a new array |
| 2312 | * will be allocated. The <code>normComponents</code> array |
| 2313 | * will be returned. Color/alpha components are stored in the |
| 2314 | * <code>normComponents</code> array starting at |
| 2315 | * <code>normOffset</code> (even if the array is allocated by this |
| 2316 | * method). An <code>ArrayIndexOutOfBoundsException</code> is thrown |
| 2317 | * if the <code>normComponents</code> array is not <code>null</code> |
| 2318 | * and is not large enough to hold all the color and alpha components |
| 2319 | * (starting at <code>normOffset</code>). |
| 2320 | * <p> |
| 2321 | * This method must be overrridden by a subclass if that subclass |
| 2322 | * is designed to translate pixel sample values to color component values |
| 2323 | * in a non-default way. The default translations implemented by this |
| 2324 | * class is described in the class comments. Any subclass implementing |
| 2325 | * a non-default translation must follow the constraints on allowable |
| 2326 | * translations defined there. |
| 2327 | * @param pixel the specified pixel |
| 2328 | * @param normComponents an array to receive the normalized components |
| 2329 | * @param normOffset the offset into the <code>normComponents</code> |
| 2330 | * array at which to start storing normalized components |
| 2331 | * @return an array containing normalized color and alpha |
| 2332 | * components. |
| 2333 | * @throws ClassCastException if <code>pixel</code> is not a primitive |
| 2334 | * array of type transferType |
| 2335 | * @throws ArrayIndexOutOfBoundsException if |
| 2336 | * <code>normComponents</code> is not large enough to hold all |
| 2337 | * color and alpha components starting at <code>normOffset</code> |
| 2338 | * @throws ArrayIndexOutOfBoundsException if |
| 2339 | * <code>pixel</code> is not large enough to hold a pixel |
| 2340 | * value for this <code>ColorModel</code>. |
| 2341 | * @since 1.4 |
| 2342 | */ |
| 2343 | public float[] getNormalizedComponents(Object pixel, |
| 2344 | float[] normComponents, |
| 2345 | int normOffset) { |
| 2346 | if (normComponents == null) { |
| 2347 | normComponents = new float[numComponents+normOffset]; |
| 2348 | } |
| 2349 | switch (transferType) { |
| 2350 | case DataBuffer.TYPE_BYTE: |
| 2351 | byte[] bpixel = (byte[]) pixel; |
| 2352 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2353 | normComponents[nc] = ((float) (bpixel[c] & 0xff)) / |
| 2354 | ((float) ((1 << nBits[c]) - 1)); |
| 2355 | } |
| 2356 | break; |
| 2357 | case DataBuffer.TYPE_USHORT: |
| 2358 | short[] uspixel = (short[]) pixel; |
| 2359 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2360 | normComponents[nc] = ((float) (uspixel[c] & 0xffff)) / |
| 2361 | ((float) ((1 << nBits[c]) - 1)); |
| 2362 | } |
| 2363 | break; |
| 2364 | case DataBuffer.TYPE_INT: |
| 2365 | int[] ipixel = (int[]) pixel; |
| 2366 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2367 | normComponents[nc] = ((float) ipixel[c]) / |
| 2368 | ((float) ((1 << nBits[c]) - 1)); |
| 2369 | } |
| 2370 | break; |
| 2371 | case DataBuffer.TYPE_SHORT: |
| 2372 | short[] spixel = (short[]) pixel; |
| 2373 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2374 | normComponents[nc] = ((float) spixel[c]) / 32767.0f; |
| 2375 | } |
| 2376 | break; |
| 2377 | case DataBuffer.TYPE_FLOAT: |
| 2378 | float[] fpixel = (float[]) pixel; |
| 2379 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2380 | normComponents[nc] = fpixel[c]; |
| 2381 | } |
| 2382 | break; |
| 2383 | case DataBuffer.TYPE_DOUBLE: |
| 2384 | double[] dpixel = (double[]) pixel; |
| 2385 | for (int c = 0, nc = normOffset; c < numComponents; c++, nc++) { |
| 2386 | normComponents[nc] = (float) dpixel[c]; |
| 2387 | } |
| 2388 | break; |
| 2389 | default: |
| 2390 | throw new UnsupportedOperationException("This method has not been "+ |
| 2391 | "implemented for transferType " + |
| 2392 | transferType); |
| 2393 | } |
| 2394 | |
| 2395 | if (supportsAlpha && isAlphaPremultiplied) { |
| 2396 | float alpha = normComponents[numColorComponents + normOffset]; |
| 2397 | if (alpha != 0.0f) { |
| 2398 | float invAlpha = 1.0f / alpha; |
| 2399 | for (int c = normOffset; c < numColorComponents + normOffset; |
| 2400 | c++) { |
| 2401 | normComponents[c] *= invAlpha; |
| 2402 | } |
| 2403 | } |
| 2404 | } |
| 2405 | if (min != null) { |
| 2406 | // Normally (i.e. when this class is not subclassed to override |
| 2407 | // this method), the test (min != null) will be equivalent to |
| 2408 | // the test (nonStdScale). However, there is an unlikely, but |
| 2409 | // possible case, in which this method is overridden, nonStdScale |
| 2410 | // is set true by initScale(), the subclass method for some |
| 2411 | // reason calls this superclass method, but the min and |
| 2412 | // diffMinMax arrays were never initialized by setupLUTs(). In |
| 2413 | // that case, the right thing to do is follow the intended |
| 2414 | // semantics of this method, and rescale the color components |
| 2415 | // only if the ColorSpace min/max were detected to be other |
| 2416 | // than 0.0/1.0 by setupLUTs(). Note that this implies the |
| 2417 | // transferType is byte, ushort, int, or short - i.e. components |
| 2418 | // derived from float and double pixel data are never rescaled. |
| 2419 | for (int c = 0; c < numColorComponents; c++) { |
| 2420 | normComponents[c + normOffset] = min[c] + |
| 2421 | diffMinMax[c] * normComponents[c + normOffset]; |
| 2422 | } |
| 2423 | } |
| 2424 | return normComponents; |
| 2425 | } |
| 2426 | |
| 2427 | /** |
| 2428 | * Forces the raster data to match the state specified in the |
| 2429 | * <CODE>isAlphaPremultiplied</CODE> variable, assuming the data |
| 2430 | * is currently correctly described by this <CODE>ColorModel</CODE>. |
| 2431 | * It may multiply or divide the color raster data by alpha, or |
| 2432 | * do nothing if the data is in the correct state. If the data needs |
| 2433 | * to be coerced, this method also returns an instance of |
| 2434 | * this <CODE>ColorModel</CODE> with |
| 2435 | * the <CODE>isAlphaPremultiplied</CODE> flag set appropriately. |
| 2436 | * Since <code>ColorModel</code> can be subclassed, subclasses inherit |
| 2437 | * the implementation of this method and if they don't override it |
| 2438 | * then they throw an exception if they use an unsupported |
| 2439 | * <code>transferType</code>. |
| 2440 | * |
| 2441 | * @throws NullPointerException if <code>raster</code> is |
| 2442 | * <code>null</code> and data coercion is required. |
| 2443 | * @throws UnsupportedOperationException if the transfer type of |
| 2444 | * this <CODE>ComponentColorModel</CODE> |
| 2445 | * is not one of the supported transfer types: |
| 2446 | * <CODE>DataBuffer.TYPE_BYTE</CODE>, <CODE>DataBuffer.TYPE_USHORT</CODE>, |
| 2447 | * <CODE>DataBuffer.TYPE_INT</CODE>, <CODE>DataBuffer.TYPE_SHORT</CODE>, |
| 2448 | * <CODE>DataBuffer.TYPE_FLOAT</CODE>, or <CODE>DataBuffer.TYPE_DOUBLE</CODE>. |
| 2449 | */ |
| 2450 | public ColorModel coerceData (WritableRaster raster, |
| 2451 | boolean isAlphaPremultiplied) { |
| 2452 | if ((supportsAlpha == false) || |
| 2453 | (this.isAlphaPremultiplied == isAlphaPremultiplied)) |
| 2454 | { |
| 2455 | // Nothing to do |
| 2456 | return this; |
| 2457 | } |
| 2458 | |
| 2459 | int w = raster.getWidth(); |
| 2460 | int h = raster.getHeight(); |
| 2461 | int aIdx = raster.getNumBands() - 1; |
| 2462 | float normAlpha; |
| 2463 | int rminX = raster.getMinX(); |
| 2464 | int rY = raster.getMinY(); |
| 2465 | int rX; |
| 2466 | if (isAlphaPremultiplied) { |
| 2467 | switch (transferType) { |
| 2468 | case DataBuffer.TYPE_BYTE: { |
| 2469 | byte pixel[] = null; |
| 2470 | byte zpixel[] = null; |
| 2471 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2472 | for (int y = 0; y < h; y++, rY++) { |
| 2473 | rX = rminX; |
| 2474 | for (int x = 0; x < w; x++, rX++) { |
| 2475 | pixel = (byte[])raster.getDataElements(rX, rY, |
| 2476 | pixel); |
| 2477 | normAlpha = (pixel[aIdx] & 0xff) * alphaScale; |
| 2478 | if (normAlpha != 0.0f) { |
| 2479 | for (int c=0; c < aIdx; c++) { |
| 2480 | pixel[c] = (byte)((pixel[c] & 0xff) * |
| 2481 | normAlpha + 0.5f); |
| 2482 | } |
| 2483 | raster.setDataElements(rX, rY, pixel); |
| 2484 | } else { |
| 2485 | if (zpixel == null) { |
| 2486 | zpixel = new byte[numComponents]; |
| 2487 | java.util.Arrays.fill(zpixel, (byte) 0); |
| 2488 | } |
| 2489 | raster.setDataElements(rX, rY, zpixel); |
| 2490 | } |
| 2491 | } |
| 2492 | } |
| 2493 | } |
| 2494 | break; |
| 2495 | case DataBuffer.TYPE_USHORT: { |
| 2496 | short pixel[] = null; |
| 2497 | short zpixel[] = null; |
| 2498 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2499 | for (int y = 0; y < h; y++, rY++) { |
| 2500 | rX = rminX; |
| 2501 | for (int x = 0; x < w; x++, rX++) { |
| 2502 | pixel = (short[])raster.getDataElements(rX, rY, |
| 2503 | pixel); |
| 2504 | normAlpha = (pixel[aIdx] & 0xffff) * alphaScale; |
| 2505 | if (normAlpha != 0.0f) { |
| 2506 | for (int c=0; c < aIdx; c++) { |
| 2507 | pixel[c] = (short) |
| 2508 | ((pixel[c] & 0xffff) * normAlpha + |
| 2509 | 0.5f); |
| 2510 | } |
| 2511 | raster.setDataElements(rX, rY, pixel); |
| 2512 | } else { |
| 2513 | if (zpixel == null) { |
| 2514 | zpixel = new short[numComponents]; |
| 2515 | java.util.Arrays.fill(zpixel, (short) 0); |
| 2516 | } |
| 2517 | raster.setDataElements(rX, rY, zpixel); |
| 2518 | } |
| 2519 | } |
| 2520 | } |
| 2521 | } |
| 2522 | break; |
| 2523 | case DataBuffer.TYPE_INT: { |
| 2524 | int pixel[] = null; |
| 2525 | int zpixel[] = null; |
| 2526 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2527 | for (int y = 0; y < h; y++, rY++) { |
| 2528 | rX = rminX; |
| 2529 | for (int x = 0; x < w; x++, rX++) { |
| 2530 | pixel = (int[])raster.getDataElements(rX, rY, |
| 2531 | pixel); |
| 2532 | normAlpha = pixel[aIdx] * alphaScale; |
| 2533 | if (normAlpha != 0.0f) { |
| 2534 | for (int c=0; c < aIdx; c++) { |
| 2535 | pixel[c] = (int) (pixel[c] * normAlpha + |
| 2536 | 0.5f); |
| 2537 | } |
| 2538 | raster.setDataElements(rX, rY, pixel); |
| 2539 | } else { |
| 2540 | if (zpixel == null) { |
| 2541 | zpixel = new int[numComponents]; |
| 2542 | java.util.Arrays.fill(zpixel, 0); |
| 2543 | } |
| 2544 | raster.setDataElements(rX, rY, zpixel); |
| 2545 | } |
| 2546 | } |
| 2547 | } |
| 2548 | } |
| 2549 | break; |
| 2550 | case DataBuffer.TYPE_SHORT: { |
| 2551 | short pixel[] = null; |
| 2552 | short zpixel[] = null; |
| 2553 | float alphaScale = 1.0f / 32767.0f; |
| 2554 | for (int y = 0; y < h; y++, rY++) { |
| 2555 | rX = rminX; |
| 2556 | for (int x = 0; x < w; x++, rX++) { |
| 2557 | pixel = (short[]) raster.getDataElements(rX, rY, |
| 2558 | pixel); |
| 2559 | normAlpha = pixel[aIdx] * alphaScale; |
| 2560 | if (normAlpha != 0.0f) { |
| 2561 | for (int c=0; c < aIdx; c++) { |
| 2562 | pixel[c] = (short) (pixel[c] * normAlpha + |
| 2563 | 0.5f); |
| 2564 | } |
| 2565 | raster.setDataElements(rX, rY, pixel); |
| 2566 | } else { |
| 2567 | if (zpixel == null) { |
| 2568 | zpixel = new short[numComponents]; |
| 2569 | java.util.Arrays.fill(zpixel, (short) 0); |
| 2570 | } |
| 2571 | raster.setDataElements(rX, rY, zpixel); |
| 2572 | } |
| 2573 | } |
| 2574 | } |
| 2575 | } |
| 2576 | break; |
| 2577 | case DataBuffer.TYPE_FLOAT: { |
| 2578 | float pixel[] = null; |
| 2579 | float zpixel[] = null; |
| 2580 | for (int y = 0; y < h; y++, rY++) { |
| 2581 | rX = rminX; |
| 2582 | for (int x = 0; x < w; x++, rX++) { |
| 2583 | pixel = (float[]) raster.getDataElements(rX, rY, |
| 2584 | pixel); |
| 2585 | normAlpha = pixel[aIdx]; |
| 2586 | if (normAlpha != 0.0f) { |
| 2587 | for (int c=0; c < aIdx; c++) { |
| 2588 | pixel[c] *= normAlpha; |
| 2589 | } |
| 2590 | raster.setDataElements(rX, rY, pixel); |
| 2591 | } else { |
| 2592 | if (zpixel == null) { |
| 2593 | zpixel = new float[numComponents]; |
| 2594 | java.util.Arrays.fill(zpixel, 0.0f); |
| 2595 | } |
| 2596 | raster.setDataElements(rX, rY, zpixel); |
| 2597 | } |
| 2598 | } |
| 2599 | } |
| 2600 | } |
| 2601 | break; |
| 2602 | case DataBuffer.TYPE_DOUBLE: { |
| 2603 | double pixel[] = null; |
| 2604 | double zpixel[] = null; |
| 2605 | for (int y = 0; y < h; y++, rY++) { |
| 2606 | rX = rminX; |
| 2607 | for (int x = 0; x < w; x++, rX++) { |
| 2608 | pixel = (double[]) raster.getDataElements(rX, rY, |
| 2609 | pixel); |
| 2610 | double dnormAlpha = pixel[aIdx]; |
| 2611 | if (dnormAlpha != 0.0) { |
| 2612 | for (int c=0; c < aIdx; c++) { |
| 2613 | pixel[c] *= dnormAlpha; |
| 2614 | } |
| 2615 | raster.setDataElements(rX, rY, pixel); |
| 2616 | } else { |
| 2617 | if (zpixel == null) { |
| 2618 | zpixel = new double[numComponents]; |
| 2619 | java.util.Arrays.fill(zpixel, 0.0); |
| 2620 | } |
| 2621 | raster.setDataElements(rX, rY, zpixel); |
| 2622 | } |
| 2623 | } |
| 2624 | } |
| 2625 | } |
| 2626 | break; |
| 2627 | default: |
| 2628 | throw new UnsupportedOperationException("This method has not been "+ |
| 2629 | "implemented for transferType " + transferType); |
| 2630 | } |
| 2631 | } |
| 2632 | else { |
| 2633 | // We are premultiplied and want to divide it out |
| 2634 | switch (transferType) { |
| 2635 | case DataBuffer.TYPE_BYTE: { |
| 2636 | byte pixel[] = null; |
| 2637 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2638 | for (int y = 0; y < h; y++, rY++) { |
| 2639 | rX = rminX; |
| 2640 | for (int x = 0; x < w; x++, rX++) { |
| 2641 | pixel = (byte[])raster.getDataElements(rX, rY, |
| 2642 | pixel); |
| 2643 | normAlpha = (pixel[aIdx] & 0xff) * alphaScale; |
| 2644 | if (normAlpha != 0.0f) { |
| 2645 | float invAlpha = 1.0f / normAlpha; |
| 2646 | for (int c=0; c < aIdx; c++) { |
| 2647 | pixel[c] = (byte) |
| 2648 | ((pixel[c] & 0xff) * invAlpha + 0.5f); |
| 2649 | } |
| 2650 | raster.setDataElements(rX, rY, pixel); |
| 2651 | } |
| 2652 | } |
| 2653 | } |
| 2654 | } |
| 2655 | break; |
| 2656 | case DataBuffer.TYPE_USHORT: { |
| 2657 | short pixel[] = null; |
| 2658 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2659 | for (int y = 0; y < h; y++, rY++) { |
| 2660 | rX = rminX; |
| 2661 | for (int x = 0; x < w; x++, rX++) { |
| 2662 | pixel = (short[])raster.getDataElements(rX, rY, |
| 2663 | pixel); |
| 2664 | normAlpha = (pixel[aIdx] & 0xffff) * alphaScale; |
| 2665 | if (normAlpha != 0.0f) { |
| 2666 | float invAlpha = 1.0f / normAlpha; |
| 2667 | for (int c=0; c < aIdx; c++) { |
| 2668 | pixel[c] = (short) |
| 2669 | ((pixel[c] & 0xffff) * invAlpha + 0.5f); |
| 2670 | } |
| 2671 | raster.setDataElements(rX, rY, pixel); |
| 2672 | } |
| 2673 | } |
| 2674 | } |
| 2675 | } |
| 2676 | break; |
| 2677 | case DataBuffer.TYPE_INT: { |
| 2678 | int pixel[] = null; |
| 2679 | float alphaScale = 1.0f / ((float) ((1<<nBits[aIdx]) - 1)); |
| 2680 | for (int y = 0; y < h; y++, rY++) { |
| 2681 | rX = rminX; |
| 2682 | for (int x = 0; x < w; x++, rX++) { |
| 2683 | pixel = (int[])raster.getDataElements(rX, rY, |
| 2684 | pixel); |
| 2685 | normAlpha = pixel[aIdx] * alphaScale; |
| 2686 | if (normAlpha != 0.0f) { |
| 2687 | float invAlpha = 1.0f / normAlpha; |
| 2688 | for (int c=0; c < aIdx; c++) { |
| 2689 | pixel[c] = (int) |
| 2690 | (pixel[c] * invAlpha + 0.5f); |
| 2691 | } |
| 2692 | raster.setDataElements(rX, rY, pixel); |
| 2693 | } |
| 2694 | } |
| 2695 | } |
| 2696 | } |
| 2697 | break; |
| 2698 | case DataBuffer.TYPE_SHORT: { |
| 2699 | short pixel[] = null; |
| 2700 | float alphaScale = 1.0f / 32767.0f; |
| 2701 | for (int y = 0; y < h; y++, rY++) { |
| 2702 | rX = rminX; |
| 2703 | for (int x = 0; x < w; x++, rX++) { |
| 2704 | pixel = (short[])raster.getDataElements(rX, rY, |
| 2705 | pixel); |
| 2706 | normAlpha = pixel[aIdx] * alphaScale; |
| 2707 | if (normAlpha != 0.0f) { |
| 2708 | float invAlpha = 1.0f / normAlpha; |
| 2709 | for (int c=0; c < aIdx; c++) { |
| 2710 | pixel[c] = (short) |
| 2711 | (pixel[c] * invAlpha + 0.5f); |
| 2712 | } |
| 2713 | raster.setDataElements(rX, rY, pixel); |
| 2714 | } |
| 2715 | } |
| 2716 | } |
| 2717 | } |
| 2718 | break; |
| 2719 | case DataBuffer.TYPE_FLOAT: { |
| 2720 | float pixel[] = null; |
| 2721 | for (int y = 0; y < h; y++, rY++) { |
| 2722 | rX = rminX; |
| 2723 | for (int x = 0; x < w; x++, rX++) { |
| 2724 | pixel = (float[])raster.getDataElements(rX, rY, |
| 2725 | pixel); |
| 2726 | normAlpha = pixel[aIdx]; |
| 2727 | if (normAlpha != 0.0f) { |
| 2728 | float invAlpha = 1.0f / normAlpha; |
| 2729 | for (int c=0; c < aIdx; c++) { |
| 2730 | pixel[c] *= invAlpha; |
| 2731 | } |
| 2732 | raster.setDataElements(rX, rY, pixel); |
| 2733 | } |
| 2734 | } |
| 2735 | } |
| 2736 | } |
| 2737 | break; |
| 2738 | case DataBuffer.TYPE_DOUBLE: { |
| 2739 | double pixel[] = null; |
| 2740 | for (int y = 0; y < h; y++, rY++) { |
| 2741 | rX = rminX; |
| 2742 | for (int x = 0; x < w; x++, rX++) { |
| 2743 | pixel = (double[])raster.getDataElements(rX, rY, |
| 2744 | pixel); |
| 2745 | double dnormAlpha = pixel[aIdx]; |
| 2746 | if (dnormAlpha != 0.0) { |
| 2747 | double invAlpha = 1.0 / dnormAlpha; |
| 2748 | for (int c=0; c < aIdx; c++) { |
| 2749 | pixel[c] *= invAlpha; |
| 2750 | } |
| 2751 | raster.setDataElements(rX, rY, pixel); |
| 2752 | } |
| 2753 | } |
| 2754 | } |
| 2755 | } |
| 2756 | break; |
| 2757 | default: |
| 2758 | throw new UnsupportedOperationException("This method has not been "+ |
| 2759 | "implemented for transferType " + transferType); |
| 2760 | } |
| 2761 | } |
| 2762 | |
| 2763 | // Return a new color model |
| 2764 | if (!signed) { |
| 2765 | return new ComponentColorModel(colorSpace, nBits, supportsAlpha, |
| 2766 | isAlphaPremultiplied, transparency, |
| 2767 | transferType); |
| 2768 | } else { |
| 2769 | return new ComponentColorModel(colorSpace, supportsAlpha, |
| 2770 | isAlphaPremultiplied, transparency, |
| 2771 | transferType); |
| 2772 | } |
| 2773 | |
| 2774 | } |
| 2775 | |
| 2776 | /** |
| 2777 | * Returns true if <CODE>raster</CODE> is compatible with this |
| 2778 | * <CODE>ColorModel</CODE>; false if it is not. |
| 2779 | * |
| 2780 | * @param raster The <CODE>Raster</CODE> object to test for compatibility. |
| 2781 | * |
| 2782 | * @return <CODE>true</CODE> if <CODE>raster</CODE> is compatible with this |
| 2783 | * <CODE>ColorModel</CODE>, <CODE>false</CODE> if it is not. |
| 2784 | */ |
| 2785 | public boolean isCompatibleRaster(Raster raster) { |
| 2786 | |
| 2787 | SampleModel sm = raster.getSampleModel(); |
| 2788 | |
| 2789 | if (sm instanceof ComponentSampleModel) { |
| 2790 | if (sm.getNumBands() != getNumComponents()) { |
| 2791 | return false; |
| 2792 | } |
| 2793 | for (int i=0; i<nBits.length; i++) { |
| 2794 | if (sm.getSampleSize(i) < nBits[i]) { |
| 2795 | return false; |
| 2796 | } |
| 2797 | } |
| 2798 | return (raster.getTransferType() == transferType); |
| 2799 | } |
| 2800 | else { |
| 2801 | return false; |
| 2802 | } |
| 2803 | } |
| 2804 | |
| 2805 | /** |
| 2806 | * Creates a <CODE>WritableRaster</CODE> with the specified width and height, |
| 2807 | * that has a data layout (<CODE>SampleModel</CODE>) compatible with |
| 2808 | * this <CODE>ColorModel</CODE>. |
| 2809 | * |
| 2810 | * @param w The width of the <CODE>WritableRaster</CODE> you want to create. |
| 2811 | * @param h The height of the <CODE>WritableRaster</CODE> you want to create. |
| 2812 | * |
| 2813 | * @return A <CODE>WritableRaster</CODE> that is compatible with |
| 2814 | * this <CODE>ColorModel</CODE>. |
| 2815 | * @see WritableRaster |
| 2816 | * @see SampleModel |
| 2817 | */ |
| 2818 | public WritableRaster createCompatibleWritableRaster (int w, int h) { |
| 2819 | int dataSize = w*h*numComponents; |
| 2820 | WritableRaster raster = null; |
| 2821 | |
| 2822 | switch (transferType) { |
| 2823 | case DataBuffer.TYPE_BYTE: |
| 2824 | case DataBuffer.TYPE_USHORT: |
| 2825 | raster = Raster.createInterleavedRaster(transferType, |
| 2826 | w, h, |
| 2827 | numComponents, null); |
| 2828 | break; |
| 2829 | default: |
| 2830 | SampleModel sm = createCompatibleSampleModel(w, h); |
| 2831 | DataBuffer db = sm.createDataBuffer(); |
| 2832 | raster = Raster.createWritableRaster(sm, db, null); |
| 2833 | } |
| 2834 | |
| 2835 | return raster; |
| 2836 | } |
| 2837 | |
| 2838 | /** |
| 2839 | * Creates a <CODE>SampleModel</CODE> with the specified width and height, |
| 2840 | * that has a data layout compatible with this <CODE>ColorModel</CODE>. |
| 2841 | * |
| 2842 | * @param w The width of the <CODE>SampleModel</CODE> you want to create. |
| 2843 | * @param h The height of the <CODE>SampleModel</CODE> you want to create. |
| 2844 | * |
| 2845 | * @return A <CODE>SampleModel</CODE> that is compatible with this |
| 2846 | * <CODE>ColorModel</CODE>. |
| 2847 | * |
| 2848 | * @see SampleModel |
| 2849 | */ |
| 2850 | public SampleModel createCompatibleSampleModel(int w, int h) { |
| 2851 | int[] bandOffsets = new int[numComponents]; |
| 2852 | for (int i=0; i < numComponents; i++) { |
| 2853 | bandOffsets[i] = i; |
| 2854 | } |
| 2855 | switch (transferType) { |
| 2856 | case DataBuffer.TYPE_BYTE: |
| 2857 | case DataBuffer.TYPE_USHORT: |
| 2858 | return new PixelInterleavedSampleModel(transferType, w, h, |
| 2859 | numComponents, |
| 2860 | w*numComponents, |
| 2861 | bandOffsets); |
| 2862 | default: |
| 2863 | return new ComponentSampleModel(transferType, w, h, |
| 2864 | numComponents, |
| 2865 | w*numComponents, |
| 2866 | bandOffsets); |
| 2867 | } |
| 2868 | } |
| 2869 | |
| 2870 | /** |
| 2871 | * Checks whether or not the specified <CODE>SampleModel</CODE> |
| 2872 | * is compatible with this <CODE>ColorModel</CODE>. |
| 2873 | * |
| 2874 | * @param sm The <CODE>SampleModel</CODE> to test for compatibility. |
| 2875 | * |
| 2876 | * @return <CODE>true</CODE> if the <CODE>SampleModel</CODE> is |
| 2877 | * compatible with this <CODE>ColorModel</CODE>, <CODE>false</CODE> |
| 2878 | * if it is not. |
| 2879 | * |
| 2880 | * @see SampleModel |
| 2881 | */ |
| 2882 | public boolean isCompatibleSampleModel(SampleModel sm) { |
| 2883 | if (!(sm instanceof ComponentSampleModel)) { |
| 2884 | return false; |
| 2885 | } |
| 2886 | |
| 2887 | // Must have the same number of components |
| 2888 | if (numComponents != sm.getNumBands()) { |
| 2889 | return false; |
| 2890 | } |
| 2891 | |
| 2892 | if (sm.getTransferType() != transferType) { |
| 2893 | return false; |
| 2894 | } |
| 2895 | |
| 2896 | return true; |
| 2897 | } |
| 2898 | |
| 2899 | /** |
| 2900 | * Returns a <CODE>Raster</CODE> representing the alpha channel of an image, |
| 2901 | * extracted from the input <CODE>Raster</CODE>. |
| 2902 | * This method assumes that <CODE>Raster</CODE> objects associated with |
| 2903 | * this <CODE>ColorModel</CODE> store the alpha band, if present, as |
| 2904 | * the last band of image data. Returns null if there is no separate spatial |
| 2905 | * alpha channel associated with this <CODE>ColorModel</CODE>. |
| 2906 | * This method creates a new <CODE>Raster</CODE>, but will share the data |
| 2907 | * array. |
| 2908 | * |
| 2909 | * @param raster The <CODE>WritableRaster</CODE> from which to extract the |
| 2910 | * alpha channel. |
| 2911 | * |
| 2912 | * @return A <CODE>WritableRaster</CODE> containing the image's alpha channel. |
| 2913 | * |
| 2914 | */ |
| 2915 | public WritableRaster getAlphaRaster(WritableRaster raster) { |
| 2916 | if (hasAlpha() == false) { |
| 2917 | return null; |
| 2918 | } |
| 2919 | |
| 2920 | int x = raster.getMinX(); |
| 2921 | int y = raster.getMinY(); |
| 2922 | int[] band = new int[1]; |
| 2923 | band[0] = raster.getNumBands() - 1; |
| 2924 | return raster.createWritableChild(x, y, raster.getWidth(), |
| 2925 | raster.getHeight(), x, y, |
| 2926 | band); |
| 2927 | } |
| 2928 | |
| 2929 | /** |
| 2930 | * Compares this color model with another for equality. |
| 2931 | * |
| 2932 | * @param obj The object to compare with this color model. |
| 2933 | * @return <CODE>true</CODE> if the color model objects are equal, |
| 2934 | * <CODE>false</CODE> if they are not. |
| 2935 | */ |
| 2936 | public boolean equals(Object obj) { |
| 2937 | if (!super.equals(obj)) { |
| 2938 | return false; |
| 2939 | } |
| 2940 | |
| 2941 | if (obj.getClass() != getClass()) { |
| 2942 | return false; |
| 2943 | } |
| 2944 | |
| 2945 | return true; |
| 2946 | } |
| 2947 | |
| 2948 | } |