371 */
372 public boolean isCS_sRGB () {
373 /* REMIND - make sure we know sRGBspace exists already */
374 return (this == sRGBspace);
375 }
376
377 /**
378 * Transforms a color value assumed to be in this ColorSpace
379 * into a value in the default CS_sRGB color space.
380 * <p>
381 * This method transforms color values using algorithms designed
382 * to produce the best perceptual match between input and output
383 * colors. In order to do colorimetric conversion of color values,
384 * you should use the <code>toCIEXYZ</code>
385 * method of this color space to first convert from the input
386 * color space to the CS_CIEXYZ color space, and then use the
387 * <code>fromCIEXYZ</code> method of the CS_sRGB color space to
388 * convert from CS_CIEXYZ to the output color space.
389 * See {@link #toCIEXYZ(float[]) toCIEXYZ} and
390 * {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
391 * <p>
392 * @param colorvalue a float array with length of at least the number
393 * of components in this ColorSpace
394 * @return a float array of length 3
395 * @throws ArrayIndexOutOfBoundsException if array length is not
396 * at least the number of components in this ColorSpace
397 */
398 public abstract float[] toRGB(float[] colorvalue);
399
400
401 /**
402 * Transforms a color value assumed to be in the default CS_sRGB
403 * color space into this ColorSpace.
404 * <p>
405 * This method transforms color values using algorithms designed
406 * to produce the best perceptual match between input and output
407 * colors. In order to do colorimetric conversion of color values,
408 * you should use the <code>toCIEXYZ</code>
409 * method of the CS_sRGB color space to first convert from the input
410 * color space to the CS_CIEXYZ color space, and then use the
411 * <code>fromCIEXYZ</code> method of this color space to
412 * convert from CS_CIEXYZ to the output color space.
413 * See {@link #toCIEXYZ(float[]) toCIEXYZ} and
414 * {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
415 * <p>
416 * @param rgbvalue a float array with length of at least 3
417 * @return a float array with length equal to the number of
418 * components in this ColorSpace
419 * @throws ArrayIndexOutOfBoundsException if array length is not
420 * at least 3
421 */
422 public abstract float[] fromRGB(float[] rgbvalue);
423
424
425 /**
426 * Transforms a color value assumed to be in this ColorSpace
427 * into the CS_CIEXYZ conversion color space.
428 * <p>
429 * This method transforms color values using relative colorimetry,
430 * as defined by the International Color Consortium standard. This
431 * means that the XYZ values returned by this method are represented
432 * relative to the D50 white point of the CS_CIEXYZ color space.
433 * This representation is useful in a two-step color conversion
434 * process in which colors are transformed from an input color
435 * space to CS_CIEXYZ and then to an output color space. This
436 * representation is not the same as the XYZ values that would
437 * be measured from the given color value by a colorimeter.
438 * A further transformation is necessary to compute the XYZ values
439 * that would be measured using current CIE recommended practices.
440 * See the {@link ICC_ColorSpace#toCIEXYZ(float[]) toCIEXYZ} method of
441 * <code>ICC_ColorSpace</code> for further information.
442 * <p>
443 * @param colorvalue a float array with length of at least the number
444 * of components in this ColorSpace
445 * @return a float array of length 3
446 * @throws ArrayIndexOutOfBoundsException if array length is not
447 * at least the number of components in this ColorSpace.
448 */
449 public abstract float[] toCIEXYZ(float[] colorvalue);
450
451
452 /**
453 * Transforms a color value assumed to be in the CS_CIEXYZ conversion
454 * color space into this ColorSpace.
455 * <p>
456 * This method transforms color values using relative colorimetry,
457 * as defined by the International Color Consortium standard. This
458 * means that the XYZ argument values taken by this method are represented
459 * relative to the D50 white point of the CS_CIEXYZ color space.
460 * This representation is useful in a two-step color conversion
461 * process in which colors are transformed from an input color
462 * space to CS_CIEXYZ and then to an output color space. The color
463 * values returned by this method are not those that would produce
464 * the XYZ value passed to the method when measured by a colorimeter.
465 * If you have XYZ values corresponding to measurements made using
466 * current CIE recommended practices, they must be converted to D50
467 * relative values before being passed to this method.
468 * See the {@link ICC_ColorSpace#fromCIEXYZ(float[]) fromCIEXYZ} method of
469 * <code>ICC_ColorSpace</code> for further information.
470 * <p>
471 * @param colorvalue a float array with length of at least 3
472 * @return a float array with length equal to the number of
473 * components in this ColorSpace
474 * @throws ArrayIndexOutOfBoundsException if array length is not
475 * at least 3
476 */
477 public abstract float[] fromCIEXYZ(float[] colorvalue);
478
479 /**
480 * Returns the color space type of this ColorSpace (for example
481 * TYPE_RGB, TYPE_XYZ, ...). The type defines the
482 * number of components of the color space and the interpretation,
483 * e.g. TYPE_RGB identifies a color space with three components - red,
484 * green, and blue. It does not define the particular color
485 * characteristics of the space, e.g. the chromaticities of the
486 * primaries.
487 *
488 * @return the type constant that represents the type of this
489 * <CODE>ColorSpace</CODE>
490 */
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371 */
372 public boolean isCS_sRGB () {
373 /* REMIND - make sure we know sRGBspace exists already */
374 return (this == sRGBspace);
375 }
376
377 /**
378 * Transforms a color value assumed to be in this ColorSpace
379 * into a value in the default CS_sRGB color space.
380 * <p>
381 * This method transforms color values using algorithms designed
382 * to produce the best perceptual match between input and output
383 * colors. In order to do colorimetric conversion of color values,
384 * you should use the <code>toCIEXYZ</code>
385 * method of this color space to first convert from the input
386 * color space to the CS_CIEXYZ color space, and then use the
387 * <code>fromCIEXYZ</code> method of the CS_sRGB color space to
388 * convert from CS_CIEXYZ to the output color space.
389 * See {@link #toCIEXYZ(float[]) toCIEXYZ} and
390 * {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
391 *
392 * @param colorvalue a float array with length of at least the number
393 * of components in this ColorSpace
394 * @return a float array of length 3
395 * @throws ArrayIndexOutOfBoundsException if array length is not
396 * at least the number of components in this ColorSpace
397 */
398 public abstract float[] toRGB(float[] colorvalue);
399
400
401 /**
402 * Transforms a color value assumed to be in the default CS_sRGB
403 * color space into this ColorSpace.
404 * <p>
405 * This method transforms color values using algorithms designed
406 * to produce the best perceptual match between input and output
407 * colors. In order to do colorimetric conversion of color values,
408 * you should use the <code>toCIEXYZ</code>
409 * method of the CS_sRGB color space to first convert from the input
410 * color space to the CS_CIEXYZ color space, and then use the
411 * <code>fromCIEXYZ</code> method of this color space to
412 * convert from CS_CIEXYZ to the output color space.
413 * See {@link #toCIEXYZ(float[]) toCIEXYZ} and
414 * {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
415 *
416 * @param rgbvalue a float array with length of at least 3
417 * @return a float array with length equal to the number of
418 * components in this ColorSpace
419 * @throws ArrayIndexOutOfBoundsException if array length is not
420 * at least 3
421 */
422 public abstract float[] fromRGB(float[] rgbvalue);
423
424
425 /**
426 * Transforms a color value assumed to be in this ColorSpace
427 * into the CS_CIEXYZ conversion color space.
428 * <p>
429 * This method transforms color values using relative colorimetry,
430 * as defined by the International Color Consortium standard. This
431 * means that the XYZ values returned by this method are represented
432 * relative to the D50 white point of the CS_CIEXYZ color space.
433 * This representation is useful in a two-step color conversion
434 * process in which colors are transformed from an input color
435 * space to CS_CIEXYZ and then to an output color space. This
436 * representation is not the same as the XYZ values that would
437 * be measured from the given color value by a colorimeter.
438 * A further transformation is necessary to compute the XYZ values
439 * that would be measured using current CIE recommended practices.
440 * See the {@link ICC_ColorSpace#toCIEXYZ(float[]) toCIEXYZ} method of
441 * <code>ICC_ColorSpace</code> for further information.
442 *
443 * @param colorvalue a float array with length of at least the number
444 * of components in this ColorSpace
445 * @return a float array of length 3
446 * @throws ArrayIndexOutOfBoundsException if array length is not
447 * at least the number of components in this ColorSpace.
448 */
449 public abstract float[] toCIEXYZ(float[] colorvalue);
450
451
452 /**
453 * Transforms a color value assumed to be in the CS_CIEXYZ conversion
454 * color space into this ColorSpace.
455 * <p>
456 * This method transforms color values using relative colorimetry,
457 * as defined by the International Color Consortium standard. This
458 * means that the XYZ argument values taken by this method are represented
459 * relative to the D50 white point of the CS_CIEXYZ color space.
460 * This representation is useful in a two-step color conversion
461 * process in which colors are transformed from an input color
462 * space to CS_CIEXYZ and then to an output color space. The color
463 * values returned by this method are not those that would produce
464 * the XYZ value passed to the method when measured by a colorimeter.
465 * If you have XYZ values corresponding to measurements made using
466 * current CIE recommended practices, they must be converted to D50
467 * relative values before being passed to this method.
468 * See the {@link ICC_ColorSpace#fromCIEXYZ(float[]) fromCIEXYZ} method of
469 * <code>ICC_ColorSpace</code> for further information.
470 *
471 * @param colorvalue a float array with length of at least 3
472 * @return a float array with length equal to the number of
473 * components in this ColorSpace
474 * @throws ArrayIndexOutOfBoundsException if array length is not
475 * at least 3
476 */
477 public abstract float[] fromCIEXYZ(float[] colorvalue);
478
479 /**
480 * Returns the color space type of this ColorSpace (for example
481 * TYPE_RGB, TYPE_XYZ, ...). The type defines the
482 * number of components of the color space and the interpretation,
483 * e.g. TYPE_RGB identifies a color space with three components - red,
484 * green, and blue. It does not define the particular color
485 * characteristics of the space, e.g. the chromaticities of the
486 * primaries.
487 *
488 * @return the type constant that represents the type of this
489 * <CODE>ColorSpace</CODE>
490 */
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