diff options
Diffstat (limited to 'nx-X11/lib/src/xcms/CvCols.c')
| -rw-r--r-- | nx-X11/lib/src/xcms/CvCols.c | 1030 |
1 files changed, 1030 insertions, 0 deletions
diff --git a/nx-X11/lib/src/xcms/CvCols.c b/nx-X11/lib/src/xcms/CvCols.c new file mode 100644 index 000000000..87d49311c --- /dev/null +++ b/nx-X11/lib/src/xcms/CvCols.c @@ -0,0 +1,1030 @@ + +/* + * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc. + * All Rights Reserved + * + * This file is a component of an X Window System-specific implementation + * of Xcms based on the TekColor Color Management System. Permission is + * hereby granted to use, copy, modify, sell, and otherwise distribute this + * software and its documentation for any purpose and without fee, provided + * that this copyright, permission, and disclaimer notice is reproduced in + * all copies of this software and in supporting documentation. TekColor + * is a trademark of Tektronix, Inc. + * + * Tektronix makes no representation about the suitability of this software + * for any purpose. It is provided "as is" and with all faults. + * + * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE, + * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE. IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF + * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE. + * + * + * NAME + * XcmsCvCols.c + * + * DESCRIPTION + * Xcms API routine that converts between the + * device-independent color spaces. + * + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" +#include "Xcmsint.h" +#include "Cv.h" + +/* + * LOCAL DEFINES + */ +#define DD_FORMAT 0x01 +#define DI_FORMAT 0x02 +#define MIX_FORMAT 0x04 +#ifndef MAX +# define MAX(x,y) ((x) > (y) ? (x) : (y)) +#endif + + +/************************************************************************ + * * + * PRIVATE ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * EqualCIEXYZ + * + * SYNOPSIS + */ +static int +EqualCIEXYZ( + XcmsColor *p1, XcmsColor *p2) +/* + * DESCRIPTION + * Compares two XcmsColor structures that are in XcmsCIEXYZFormat + * + * RETURNS + * Returns 1 if equal; 0 otherwise. + * + */ +{ + if (p1->format != XcmsCIEXYZFormat || p2->format != XcmsCIEXYZFormat) { + return(0); + } + if ((p1->spec.CIEXYZ.X != p2->spec.CIEXYZ.X) + || (p1->spec.CIEXYZ.Y != p2->spec.CIEXYZ.Y) + || (p1->spec.CIEXYZ.Z != p2->spec.CIEXYZ.Z)) { + return(0); + } + return(1); +} + + +/* + * NAME + * XcmsColorSpace + * + * SYNOPSIS + */ +static XcmsColorSpace * +ColorSpaceOfID( + XcmsCCC ccc, + XcmsColorFormat id) +/* + * DESCRIPTION + * Returns a pointer to the color space structure + * (XcmsColorSpace) associated with the specified color space + * ID. + * + * RETURNS + * Pointer to matching XcmsColorSpace structure if found; + * otherwise NULL. + */ +{ + XcmsColorSpace **papColorSpaces; + + if (ccc == NULL) { + return(NULL); + } + + /* + * First try Device-Independent color spaces + */ + papColorSpaces = _XcmsDIColorSpaces; + if (papColorSpaces != NULL) { + while (*papColorSpaces != NULL) { + if ((*papColorSpaces)->id == id) { + return(*papColorSpaces); + } + papColorSpaces++; + } + } + + /* + * Next try Device-Dependent color spaces + */ + papColorSpaces = ((XcmsFunctionSet *)ccc->pPerScrnInfo->functionSet)->DDColorSpaces; + if (papColorSpaces != NULL) { + while (*papColorSpaces != NULL) { + if ((*papColorSpaces)->id == id) { + return(*papColorSpaces); + } + papColorSpaces++; + } + } + + return(NULL); +} + + +/* + * NAME + * ValidDIColorSpaceID + * + * SYNOPSIS + */ +static int +ValidDIColorSpaceID( + XcmsColorFormat id) +/* + * DESCRIPTION + * Determines if the specified color space ID is a valid + * Device-Independent color space in the specified Color + * Conversion Context. + * + * RETURNS + * Returns zero if not valid; otherwise non-zero. + */ +{ + XcmsColorSpace **papRec; + papRec = _XcmsDIColorSpaces; + if (papRec != NULL) { + while (*papRec != NULL) { + if ((*papRec)->id == id) { + return(1); + } + papRec++; + } + } + return(0); +} + + +/* + * NAME + * ValidDDColorSpaceID + * + * SYNOPSIS + */ +static int +ValidDDColorSpaceID( + XcmsCCC ccc, + XcmsColorFormat id) +/* + * DESCRIPTION + * Determines if the specified color space ID is a valid + * Device-Dependent color space in the specified Color + * Conversion Context. + * + * RETURNS + * Returns zero if not valid; otherwise non-zero. + */ +{ + XcmsColorSpace **papRec; + + if (ccc->pPerScrnInfo->state != XcmsInitNone) { + papRec = ((XcmsFunctionSet *)ccc->pPerScrnInfo->functionSet)->DDColorSpaces; + while (*papRec != NULL) { + if ((*papRec)->id == id) { + return(1); + } + papRec++; + } + } + return(0); +} + + +/* + * NAME + * ConvertMixedColors - Convert XcmsColor structures + * + * SYNOPSIS + */ +static Status +ConvertMixedColors( + XcmsCCC ccc, + XcmsColor *pColors_in_out, + XcmsColor *pWhitePt, + unsigned int nColors, + XcmsColorFormat targetFormat, + unsigned char format_flag) +/* + * DESCRIPTION + * This routine will only convert the following types of + * batches: + * DI to DI + * DD to DD + * DD to CIEXYZ + * In other words, it will not convert the following types of + * batches: + * DI to DD + * DD to DI(not CIEXYZ) + * + * format_flag: + * 0x01 : convert Device-Dependent only specifications to the + * target format. + * 0x02 : convert Device-Independent only specifications to the + * target format. + * 0x03 : convert all specifications to the target format. + * + * RETURNS + * XcmsFailure if failed, + * XcmsSuccess if none of the color specifications were + * compressed in the conversion process + * XcmsSuccessWithCompression if at least one of the + * color specifications were compressed in the + * conversion process. + * + */ +{ + XcmsColor *pColor, *pColors_start; + XcmsColorFormat format; + Status retval_tmp; + Status retval = XcmsSuccess; + unsigned int iColors; + unsigned int nBatch; + + /* + * Convert array of mixed color specifications in batches of + * contiguous formats to the target format + */ + iColors = 0; + while (iColors < nColors) { + /* + * Find contiguous array of color specifications with the + * same format + */ + pColor = pColors_start = pColors_in_out + iColors; + format = pColors_start->format; + nBatch = 0; + while (iColors < nColors && pColor->format == format) { + pColor++; + nBatch++; + iColors++; + } + if (format != targetFormat) { + /* + * Need to convert this batch from current format to target format. + */ + if (XCMS_DI_ID(format) && (format_flag & DI_FORMAT) && + XCMS_DI_ID(targetFormat)) { + /* + * DI->DI + * + * Format of interest is Device-Independent, + * This batch contains Device-Independent specifications, and + * the Target format is Device-Independent. + */ + retval_tmp = _XcmsDIConvertColors(ccc, pColors_start, pWhitePt, + nBatch, targetFormat); + } else if (XCMS_DD_ID(format) && (format_flag & DD_FORMAT) && + (targetFormat == XcmsCIEXYZFormat)) { + /* + * DD->CIEXYZ + * + * Format of interest is Device-Dependent, + * This batch contains Device-Dependent specifications, and + * the Target format is CIEXYZ. + * + * Since DD->CIEXYZ we can use NULL instead of pCompressed. + */ + if ((ccc->whitePtAdjProc != NULL) && !_XcmsEqualWhitePts(ccc, + pWhitePt, ScreenWhitePointOfCCC(ccc))) { + /* + * Need to call WhiteAdjustProc (Screen White Point to + * White Point). + */ + retval_tmp = (*ccc->whitePtAdjProc)(ccc, + ScreenWhitePointOfCCC(ccc), pWhitePt, + XcmsCIEXYZFormat, pColors_start, nBatch, + (Bool *)NULL); + } else { + retval_tmp = _XcmsDDConvertColors(ccc, pColors_start, + nBatch, XcmsCIEXYZFormat, (Bool *)NULL); + } + } else if (XCMS_DD_ID(format) && (format_flag & DD_FORMAT) && + XCMS_DD_ID(targetFormat)) { + /* + * DD->DD(not CIEXYZ) + * + * Format of interest is Device-Dependent, + * This batch contains Device-Dependent specifications, and + * the Target format is Device-Dependent and not CIEXYZ. + */ + retval_tmp = _XcmsDDConvertColors(ccc, pColors_start, nBatch, + targetFormat, (Bool *)NULL); + } else { + /* + * This routine is called for the wrong reason. + */ + return(XcmsFailure); + } + if (retval_tmp == XcmsFailure) { + return(XcmsFailure); + } + retval = MAX(retval, retval_tmp); + } + } + return(retval); +} + + +/************************************************************************ + * * + * API PRIVATE ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * _XcmsEqualWhitePts + * + * SYNOPSIS + */ +int +_XcmsEqualWhitePts(XcmsCCC ccc, XcmsColor *pWhitePt1, XcmsColor *pWhitePt2) +/* + * DESCRIPTION + * + * RETURNS + * Returns 0 if not equal; otherwise 1. + * + */ +{ + XcmsColor tmp1, tmp2; + + memcpy((char *)&tmp1, (char *)pWhitePt1, sizeof(XcmsColor)); + memcpy((char *)&tmp2, (char *)pWhitePt2, sizeof(XcmsColor)); + + if (tmp1.format != XcmsCIEXYZFormat) { + if (_XcmsDIConvertColors(ccc, &tmp1, (XcmsColor *) NULL, 1, + XcmsCIEXYZFormat)==0) { + return(0); + } + } + + if (tmp2.format != XcmsCIEXYZFormat) { + if (_XcmsDIConvertColors(ccc, &tmp2, (XcmsColor *) NULL, 1, + XcmsCIEXYZFormat)==0) { + return(0); + } + } + + return (EqualCIEXYZ(&tmp1, &tmp2)); +} + + +/* + * NAME + * _XcmsDIConvertColors - Convert XcmsColor structures + * + * SYNOPSIS + */ +Status +_XcmsDIConvertColors( + XcmsCCC ccc, + XcmsColor *pColors_in_out, + XcmsColor *pWhitePt, + unsigned int nColors, + XcmsColorFormat newFormat) +/* + * DESCRIPTION + * Convert XcmsColor structures to another Device-Independent + * form. + * + * Here are some assumptions that this routine makes: + * 1. The calling routine has already checked if + * pColors_in_out->format == newFormat, therefore + * there is no need to check again here. + * 2. The calling routine has already checked nColors, + * therefore this routine assumes nColors > 0. + * 3. The calling routine may want to convert only between + * CIExyY <-> CIEXYZ <-> CIEuvY + * therefore, this routine allows pWhitePt to equal NULL. + * + * + * RETURNS + * XcmsFailure if failed, + * XcmsSuccess if succeeded. + * + */ +{ + XcmsColorSpace *pFrom, *pTo; + XcmsDIConversionProc *src_to_CIEXYZ, *src_from_CIEXYZ; + XcmsDIConversionProc *dest_to_CIEXYZ, *dest_from_CIEXYZ; + XcmsDIConversionProc *to_CIEXYZ_stop, *from_CIEXYZ_start; + XcmsDIConversionProc *tmp; + + /* + * Allow pWhitePt to equal NULL. This appropriate when converting + * anywhere between: + * CIExyY <-> CIEXYZ <-> CIEuvY + */ + + if (pColors_in_out == NULL || + !ValidDIColorSpaceID(pColors_in_out->format) || + !ValidDIColorSpaceID(newFormat)) { + return(XcmsFailure); + } + + /* + * Get a handle on the function list for the current specification format + */ + if ((pFrom = ColorSpaceOfID(ccc, pColors_in_out->format)) + == NULL) { + return(XcmsFailure); + } + + /* + * Get a handle on the function list for the new specification format + */ + if ((pTo = ColorSpaceOfID(ccc, newFormat)) == NULL) { + return(XcmsFailure); + } + + src_to_CIEXYZ = pFrom->to_CIEXYZ; + src_from_CIEXYZ = pFrom->from_CIEXYZ; + dest_to_CIEXYZ = pTo->to_CIEXYZ; + dest_from_CIEXYZ = pTo->from_CIEXYZ; + + if (pTo->inverse_flag && pFrom->inverse_flag) { + /* + * Find common function pointers + */ + for (to_CIEXYZ_stop = src_to_CIEXYZ; *to_CIEXYZ_stop; to_CIEXYZ_stop++){ + for (tmp = dest_to_CIEXYZ; *tmp; tmp++) { + if (*to_CIEXYZ_stop == *tmp) { + goto Continue; + } + } + } + +Continue: + + /* + * Execute the functions to CIEXYZ, stopping short as necessary + */ + while (src_to_CIEXYZ != to_CIEXYZ_stop) { + if ((*src_to_CIEXYZ++)(ccc, pWhitePt, pColors_in_out, + nColors) == XcmsFailure) { + return(XcmsFailure); + } + } + + /* + * Determine where to start on the from_CIEXYZ path. + */ + from_CIEXYZ_start = dest_from_CIEXYZ; + tmp = src_from_CIEXYZ; + while ((*from_CIEXYZ_start == *tmp) && (*from_CIEXYZ_start != NULL)) { + from_CIEXYZ_start++; + tmp++; + } + + } else { + /* + * The function in at least one of the Color Spaces are not + * complementary, i.e., + * for an i, 0 <= i < n elements + * from_CIEXYZ[i] is not the inverse of to_CIEXYZ[i] + * + * Execute the functions all the way to CIEXYZ + */ + while (*src_to_CIEXYZ) { + if ((*src_to_CIEXYZ++)(ccc, pWhitePt, pColors_in_out, + nColors) == XcmsFailure) { + return(XcmsFailure); + } + } + + /* + * Determine where to start on the from_CIEXYZ path. + */ + from_CIEXYZ_start = dest_from_CIEXYZ; + } + + + /* + * Execute the functions from CIEXYZ. + */ + while (*from_CIEXYZ_start) { + if ((*from_CIEXYZ_start++)(ccc, pWhitePt, pColors_in_out, + nColors) == XcmsFailure) { + return(XcmsFailure); + } + } + + return(XcmsSuccess); +} + + +/* + * NAME + * _XcmsDDConvertColors - Convert XcmsColor structures + * + * SYNOPSIS + */ +Status +_XcmsDDConvertColors( + XcmsCCC ccc, + XcmsColor *pColors_in_out, + unsigned int nColors, + XcmsColorFormat newFormat, + Bool *pCompressed) +/* + * DESCRIPTION + * Convert XcmsColor structures: + * + * 1. From CIEXYZ to Device-Dependent formats (typically RGB and + * RGBi), + * or + * 2. Between Device-Dependent formats (typically RGB and RGBi). + * + * Assumes that these specifications have already been white point + * adjusted if necessary from Client White Point to Screen + * White Point. Therefore, the white point now associated + * with the specifications is the Screen White Point. + * + * pCompressed may be NULL. If so this indicates that the + * calling routine is not interested in knowing exactly which + * color was compressed, if any. + * + * + * RETURNS + * XcmsFailure if failed, + * XcmsSuccess if none of the color specifications were + * compressed in the conversion process + * XcmsSuccessWithCompression if at least one of the + * color specifications were compressed in the + * conversion process. + * + */ +{ + XcmsColorSpace *pFrom, *pTo; + XcmsDDConversionProc *src_to_CIEXYZ, *src_from_CIEXYZ; + XcmsDDConversionProc *dest_to_CIEXYZ, *dest_from_CIEXYZ; + XcmsDDConversionProc *from_CIEXYZ_start, *to_CIEXYZ_stop; + XcmsDDConversionProc *tmp; + int retval; + int hasCompressed = 0; + + if (ccc == NULL || pColors_in_out == NULL) { + return(XcmsFailure); + } + + if (nColors == 0 || pColors_in_out->format == newFormat) { + /* do nothing */ + return(XcmsSuccess); + } + + if (((XcmsFunctionSet *)ccc->pPerScrnInfo->functionSet) == NULL) { + return(XcmsFailure); /* hmm, an internal error? */ + } + + /* + * Its ok if pColors_in_out->format == XcmsCIEXYZFormat + * or + * if newFormat == XcmsCIEXYZFormat + */ + if ( !( ValidDDColorSpaceID(ccc, pColors_in_out->format) + || + (pColors_in_out->format == XcmsCIEXYZFormat)) + || + !(ValidDDColorSpaceID(ccc, newFormat) + || + newFormat == XcmsCIEXYZFormat)) { + return(XcmsFailure); + } + + if ((pFrom = ColorSpaceOfID(ccc, pColors_in_out->format)) == NULL){ + return(XcmsFailure); + } + + if ((pTo = ColorSpaceOfID(ccc, newFormat)) == NULL) { + return(XcmsFailure); + } + + src_to_CIEXYZ = (XcmsDDConversionProc *)pFrom->to_CIEXYZ; + src_from_CIEXYZ = (XcmsDDConversionProc *)pFrom->from_CIEXYZ; + dest_to_CIEXYZ = (XcmsDDConversionProc *)pTo->to_CIEXYZ; + dest_from_CIEXYZ = (XcmsDDConversionProc *)pTo->from_CIEXYZ; + + if (pTo->inverse_flag && pFrom->inverse_flag) { + /* + * Find common function pointers + */ + for (to_CIEXYZ_stop = src_to_CIEXYZ; *to_CIEXYZ_stop; to_CIEXYZ_stop++){ + for (tmp = dest_to_CIEXYZ; *tmp; tmp++) { + if (*to_CIEXYZ_stop == *tmp) { + goto Continue; + } + } + } +Continue: + + /* + * Execute the functions + */ + while (src_to_CIEXYZ != to_CIEXYZ_stop) { + retval = (*src_to_CIEXYZ++)(ccc, pColors_in_out, nColors, + pCompressed); + if (retval == XcmsFailure) { + return(XcmsFailure); + } + hasCompressed |= (retval == XcmsSuccessWithCompression); + } + + /* + * Determine where to start on the from_CIEXYZ path. + */ + from_CIEXYZ_start = dest_from_CIEXYZ; + tmp = src_from_CIEXYZ; + while ((*from_CIEXYZ_start == *tmp) && (*from_CIEXYZ_start != NULL)) { + from_CIEXYZ_start++; + tmp++; + } + + } else { + /* + * The function in at least one of the Color Spaces are not + * complementary, i.e., + * for an i, 0 <= i < n elements + * from_CIEXYZ[i] is not the inverse of to_CIEXYZ[i] + * + * Execute the functions all the way to CIEXYZ + */ + while (*src_to_CIEXYZ) { + retval = (*src_to_CIEXYZ++)(ccc, pColors_in_out, nColors, + pCompressed); + if (retval == XcmsFailure) { + return(XcmsFailure); + } + hasCompressed |= (retval == XcmsSuccessWithCompression); + } + + /* + * Determine where to start on the from_CIEXYZ path. + */ + from_CIEXYZ_start = dest_from_CIEXYZ; + } + + while (*from_CIEXYZ_start) { + retval = (*from_CIEXYZ_start++)(ccc, pColors_in_out, nColors, + pCompressed); + if (retval == XcmsFailure) { + return(XcmsFailure); + } + hasCompressed |= (retval == XcmsSuccessWithCompression); + } + + return(hasCompressed ? XcmsSuccessWithCompression : XcmsSuccess); +} + + +/************************************************************************ + * * + * PUBLIC ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * XcmsConvertColors - Convert XcmsColor structures + * + * SYNOPSIS + */ +Status +XcmsConvertColors( + XcmsCCC ccc, + XcmsColor *pColors_in_out, + unsigned int nColors, + XcmsColorFormat targetFormat, + Bool *pCompressed) +/* + * DESCRIPTION + * Convert XcmsColor structures to another format + * + * RETURNS + * XcmsFailure if failed, + * XcmsSuccess if succeeded without gamut compression, + * XcmsSuccessWithCompression if succeeded with gamut + * compression. + * + */ +{ + XcmsColor clientWhitePt; + XcmsColor Color1; + XcmsColor *pColors_tmp; + int callWhiteAdjustProc = 0; + XcmsColorFormat format; + Status retval; + unsigned char contents_flag = 0x00; + unsigned int iColors; + + if (ccc == NULL || pColors_in_out == NULL || + !(ValidDIColorSpaceID(targetFormat) || + ValidDDColorSpaceID(ccc, targetFormat))) { + return(XcmsFailure); + } + + /* + * Check formats in color specification array + */ + format = pColors_in_out->format; + for (pColors_tmp = pColors_in_out, iColors = nColors; iColors; pColors_tmp++, iColors--) { + if (!(ValidDIColorSpaceID(pColors_tmp->format) || + ValidDDColorSpaceID(ccc, pColors_tmp->format))) { + return(XcmsFailure); + } + if (XCMS_DI_ID(pColors_tmp->format)) { + contents_flag |= DI_FORMAT; + } else { + contents_flag |= DD_FORMAT; + } + if (pColors_tmp->format != format) { + contents_flag |= MIX_FORMAT; + } + } + + /* + * Check if we need the Client White Point. + */ + if ((contents_flag & DI_FORMAT) || XCMS_DI_ID(targetFormat)) { + /* To proceed, we need to get the Client White Point */ + memcpy((char *)&clientWhitePt, (char *)&ccc->clientWhitePt, + sizeof(XcmsColor)); + if (clientWhitePt.format == XcmsUndefinedFormat) { + /* + * Client White Point is undefined, therefore set to the Screen + * White Point. + * Since Client White Point == Screen White Point, WhiteAdjustProc + * is not called. + */ + memcpy((char *)&clientWhitePt, + (char *)&ccc->pPerScrnInfo->screenWhitePt, + sizeof(XcmsColor)); + } else if ((ccc->whitePtAdjProc != NULL) && !_XcmsEqualWhitePts(ccc, + &clientWhitePt, ScreenWhitePointOfCCC(ccc))) { + /* + * Client White Point != Screen White Point, and WhiteAdjustProc + * is not NULL, therefore, will need to call it when + * converting between DI and DD specifications. + */ + callWhiteAdjustProc = 1; + } + } + + /* + * Make copy of array of color specifications + */ + if (nColors > 1) { + pColors_tmp = Xmalloc(nColors * sizeof(XcmsColor)); + } else { + pColors_tmp = &Color1; + } + memcpy((char *)pColors_tmp, (char *)pColors_in_out, + nColors * sizeof(XcmsColor)); + + /* + * zero out pCompressed + */ + if (pCompressed) { + bzero((char *)pCompressed, nColors * sizeof(Bool)); + } + + if (contents_flag == DD_FORMAT || contents_flag == DI_FORMAT) { + /* + * ENTIRE ARRAY IS IN ONE FORMAT. + */ + if (XCMS_DI_ID(format) && XCMS_DI_ID(targetFormat)) { + /* + * DI-to-DI only conversion + */ + retval = _XcmsDIConvertColors(ccc, pColors_tmp, + &clientWhitePt, nColors, targetFormat); + } else if (XCMS_DD_ID(format) && XCMS_DD_ID(targetFormat)) { + /* + * DD-to-DD only conversion + * Since DD->DD there will be no compressed thus we can + * pass NULL instead of pCompressed. + */ + retval = _XcmsDDConvertColors(ccc, pColors_tmp, nColors, + targetFormat, (Bool *)NULL); + } else { + /* + * Otherwise we have: + * 1. Device-Independent to Device-Dependent Conversion + * OR + * 2. Device-Dependent to Device-Independent Conversion + * + * We need to go from oldFormat -> CIEXYZ -> targetFormat + * adjusting for white points as necessary. + */ + + if (XCMS_DI_ID(format)) { + /* + * 1. Device-Independent to Device-Dependent Conversion + */ + if (callWhiteAdjustProc) { + /* + * White Point Adjustment + * Client White Point to Screen White Point + */ + retval = (*ccc->whitePtAdjProc)(ccc, &clientWhitePt, + ScreenWhitePointOfCCC(ccc), targetFormat, + pColors_tmp, nColors, pCompressed); + } else { + if (_XcmsDIConvertColors(ccc, pColors_tmp, + &clientWhitePt, nColors, XcmsCIEXYZFormat) + == XcmsFailure) { + goto Failure; + } + retval = _XcmsDDConvertColors(ccc, pColors_tmp, nColors, + targetFormat, pCompressed); + } + } else { + /* + * 2. Device-Dependent to Device-Independent Conversion + */ + if (callWhiteAdjustProc) { + /* + * White Point Adjustment + * Screen White Point to Client White Point + */ + retval = (*ccc->whitePtAdjProc)(ccc, + ScreenWhitePointOfCCC(ccc), &clientWhitePt, + targetFormat, pColors_tmp, nColors, pCompressed); + } else { + /* + * Since DD->CIEXYZ, no compression takes place therefore + * we can pass NULL instead of pCompressed. + */ + if (_XcmsDDConvertColors(ccc, pColors_tmp, nColors, + XcmsCIEXYZFormat, (Bool *)NULL) == XcmsFailure) { + goto Failure; + } + retval = _XcmsDIConvertColors(ccc, pColors_tmp, + &clientWhitePt, nColors, targetFormat); + } + } + } + } else { + /* + * ARRAY HAS MIXED FORMATS. + */ + if ((contents_flag == (DI_FORMAT | MIX_FORMAT)) && + XCMS_DI_ID(targetFormat)) { + /* + * Convert from DI to DI in batches of contiguous formats + * + * Because DI->DI, WhiteAdjustProc not called. + */ + retval = ConvertMixedColors(ccc, pColors_tmp, &clientWhitePt, + nColors, targetFormat, (unsigned char)DI_FORMAT); + } else if ((contents_flag == (DD_FORMAT | MIX_FORMAT)) && + XCMS_DD_ID(targetFormat)) { + /* + * Convert from DD to DD in batches of contiguous formats + * + * Because DD->DD, WhiteAdjustProc not called. + */ + retval = ConvertMixedColors(ccc, pColors_tmp, + (XcmsColor *)NULL, nColors, targetFormat, + (unsigned char)DD_FORMAT); + } else if (XCMS_DI_ID(targetFormat)) { + /* + * We need to convert from DI-to-DI and DD-to-DI, therefore + * 1. convert DD specifications to CIEXYZ, then + * 2. convert all in batches to the target DI format. + * + * Note that ConvertMixedColors will call WhiteAdjustProc + * as necessary. + */ + + /* + * Convert only DD specifications in batches of contiguous formats + * to CIEXYZ + * + * Since DD->CIEXYZ, ConvertMixedColors will apply WhiteAdjustProc + * if required. + */ + retval = ConvertMixedColors(ccc, pColors_tmp, &clientWhitePt, + nColors, XcmsCIEXYZFormat, (unsigned char)DD_FORMAT); + + /* + * Because at this point we may have a mix of DI formats + * (e.g., CIEXYZ, CIELuv) we must convert the specs to the + * target DI format in batches of contiguous source formats. + */ + retval = ConvertMixedColors(ccc, pColors_tmp, &clientWhitePt, + nColors, targetFormat, (unsigned char)DI_FORMAT); + } else { + /* + * We need to convert from DI-to-DD and DD-to-DD, therefore + * 1. convert DI specifications to CIEXYZ, then + * 2. convert all to the DD target format. + * + * This allows white point adjustment and gamut compression + * to be applied to all the color specifications in one + * swoop if those functions do in fact modify the entire + * group of color specifications. + */ + + /* + * Convert in batches to CIEXYZ + * + * If DD->CIEXYZ, ConvertMixedColors will apply WhiteAdjustProc + * if required. + */ + if ((retval = ConvertMixedColors(ccc, pColors_tmp, &clientWhitePt, + nColors, XcmsCIEXYZFormat, + (unsigned char)(DI_FORMAT | DD_FORMAT))) == XcmsFailure) { + goto Failure; + } + + /* + * Convert all specifications (now in CIEXYZ format) to + * the target DD format. + * Since CIEXYZ->DD, compression MAY take place therefore + * we must pass pCompressed. + * Note that WhiteAdjustProc must be used if necessary. + */ + if (callWhiteAdjustProc) { + /* + * White Point Adjustment + * Client White Point to Screen White Point + */ + retval = (*ccc->whitePtAdjProc)(ccc, + &clientWhitePt, ScreenWhitePointOfCCC(ccc), + targetFormat, pColors_tmp, nColors, pCompressed); + } else { + retval = _XcmsDDConvertColors(ccc, pColors_tmp, nColors, + targetFormat, pCompressed); + } + } + } + + if (retval != XcmsFailure) { + memcpy((char *)pColors_in_out, (char *)pColors_tmp, + nColors * sizeof(XcmsColor)); + } + if (nColors > 1) { + Xfree(pColors_tmp); + } + return(retval); + +Failure: + if (nColors > 1) { + Xfree(pColors_tmp); + } + return(XcmsFailure); +} + + +/* + * NAME + * XcmsRegFormatOfPrefix + * + * SYNOPSIS + */ +XcmsColorFormat +_XcmsRegFormatOfPrefix( + _Xconst char *prefix) +/* + * DESCRIPTION + * Returns a color space ID associated with the specified + * X Consortium registered color space prefix. + * + * RETURNS + * The color space ID if found; + * otherwise NULL. + */ +{ + XcmsRegColorSpaceEntry *pEntry = _XcmsRegColorSpaces; + + while (pEntry->prefix != NULL) { + if (strcmp(prefix, pEntry->prefix) == 0) { + return(pEntry->id); + } + pEntry++; + } + return(XcmsUndefinedFormat); +} |