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/*

 * Copyright (c) 2002-2003 Michael David Adams.

 * All rights reserved.

 */

/* __START_OF_JASPER_LICENSE__

 *

 * JasPer Software License

 *

 * IMAGE POWER JPEG-2000 PUBLIC LICENSE

 * ************************************

 *

 * GRANT:

 *

 * Permission is hereby granted, free of charge, to any person (the "User")

 * obtaining a copy of this software and associated documentation, to deal

 * in the JasPer Software without restriction, including without limitation

 * the right to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the JasPer Software (in source and binary forms),

 * and to permit persons to whom the JasPer Software is furnished to do so,

 * provided further that the License Conditions below are met.

 *

 * License Conditions

 * ******************

 *

 * A.  Redistributions of source code must retain the above copyright notice,

 * and this list of conditions, and the following disclaimer.

 *

 * B.  Redistributions in binary form must reproduce the above copyright

 * notice, and this list of conditions, and the following disclaimer in

 * the documentation and/or other materials provided with the distribution.

 *

 * C.  Neither the name of Image Power, Inc. nor any other contributor

 * (including, but not limited to, the University of British Columbia and

 * Michael David Adams) may be used to endorse or promote products derived

 * from this software without specific prior written permission.

 *

 * D.  User agrees that it shall not commence any action against Image Power,

 * Inc., the University of British Columbia, Michael David Adams, or any

 * other contributors (collectively "Licensors") for infringement of any

 * intellectual property rights ("IPR") held by the User in respect of any

 * technology that User owns or has a right to license or sublicense and

 * which is an element required in order to claim compliance with ISO/IEC

 * 15444-1 (i.e., JPEG-2000 Part 1).  "IPR" means all intellectual property

 * rights worldwide arising under statutory or common law, and whether

 * or not perfected, including, without limitation, all (i) patents and

 * patent applications owned or licensable by User; (ii) rights associated

 * with works of authorship including copyrights, copyright applications,

 * copyright registrations, mask work rights, mask work applications,

 * mask work registrations; (iii) rights relating to the protection of

 * trade secrets and confidential information; (iv) any right analogous

 * to those set forth in subsections (i), (ii), or (iii) and any other

 * proprietary rights relating to intangible property (other than trademark,

 * trade dress, or service mark rights); and (v) divisions, continuations,

 * renewals, reissues and extensions of the foregoing (as and to the extent

 * applicable) now existing, hereafter filed, issued or acquired.

 *

 * E.  If User commences an infringement action against any Licensor(s) then

 * such Licensor(s) shall have the right to terminate User's license and

 * all sublicenses that have been granted hereunder by User to other parties.

 *

 * F.  This software is for use only in hardware or software products that

 * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1).  No license

 * or right to this Software is granted for products that do not comply

 * with ISO/IEC 15444-1.  The JPEG-2000 Part 1 standard can be purchased

 * from the ISO.

 *

 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.

 * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER

 * THIS DISCLAIMER.  THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND

 * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY

 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION,

 * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE,

 * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING.  THOSE INTENDING

 * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE

 * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING

 * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS.

 * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE

 * IS WITH THE USER.  SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE

 * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY

 * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY

 * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING,

 * REPAIR OR CORRECTION.  UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY,

 * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE

 * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC.,

 * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE

 * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO

 * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR

 * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION,

 * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR

 * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF

 * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY

 * OF SUCH DAMAGES.  THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT

 * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR

 * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING

 * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES,

 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT

 * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE

 * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY

 * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE

 * ("HIGH RISK ACTIVITIES").  LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS

 * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.  USER WILL NOT

 * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING

 * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS

 * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE

 * NOTICE SPECIFIED IN THIS SECTION.

 *

 * __END_OF_JASPER_LICENSE__

 */

/*

 * Color Management

 *

 * $Id: jas_cm.c,v 1.1 2003/05/15 01:30:32 ace Exp $

 */

#include "jas_config.h"

#include <math.h>

#include <stdlib.h>

#include <assert.h>

#include "jas_cm.h"

#include "jas_icc.h"

#include "jas_init.h"

#include "jas_stream.h"

#include "jas_malloc.h"

#include "jas_math.h"

static jas_cmprof_t *jas_cmprof_create(void);

static void jas_cmshapmatlut_cleanup(jas_cmshapmatlut_t *);

static jas_cmreal_t jas_cmshapmatlut_lookup(jas_cmshapmatlut_t *lut, jas_cmreal_t x);

static void jas_cmpxform_destroy(jas_cmpxform_t *pxform);

static jas_cmpxform_t *jas_cmpxform_copy(jas_cmpxform_t *pxform);

static void jas_cmshapmat_destroy(jas_cmpxform_t *pxform);

static int jas_cmshapmat_apply(jas_cmpxform_t *pxform, jas_cmreal_t *in,

  jas_cmreal_t *out, int cnt);

static int jas_cmputint(long **bufptr, int sgnd, int prec, long val);

static int jas_cmgetint(long **bufptr, int sgnd, int prec, long *val);

static int jas_cmpxformseq_append(jas_cmpxformseq_t *pxformseq,

  jas_cmpxformseq_t *othpxformseq);

static int jas_cmpxformseq_appendcnvt(jas_cmpxformseq_t *pxformseq,

  int, int);

static int jas_cmpxformseq_resize(jas_cmpxformseq_t *pxformseq, int n);

static int mono(jas_iccprof_t *prof, int op, jas_cmpxformseq_t **pxformseq);

static int triclr(jas_iccprof_t *prof, int op, jas_cmpxformseq_t **retpxformseq);

static void jas_cmpxformseq_destroy(jas_cmpxformseq_t *pxformseq);

static int jas_cmpxformseq_delete(jas_cmpxformseq_t *pxformseq, int i);

static jas_cmpxformseq_t *jas_cmpxformseq_create(void);

static jas_cmpxformseq_t *jas_cmpxformseq_copy(jas_cmpxformseq_t *pxformseq);

static int jas_cmshapmat_invmat(jas_cmreal_t out[3][4], jas_cmreal_t in[3][4]);

static int jas_cmpxformseq_insertpxform(jas_cmpxformseq_t *pxformseq,

  int i, jas_cmpxform_t *pxform);

#define SEQFWD(intent)  (intent)

#define SEQREV(intent)  (4 + (intent))

#define SEQSIM(intent)  (8 + (intent))

#define SEQGAM          12

#define fwdpxformseq(prof, intent) \

  (((prof)->pxformseqs[SEQFWD(intent)]) ? \

  ((prof)->pxformseqs[SEQFWD(intent)]) : \

  ((prof)->pxformseqs[SEQFWD(0)]))

#define revpxformseq(prof, intent) \

  (((prof)->pxformseqs[SEQREV(intent)]) ? \

  ((prof)->pxformseqs[SEQREV(intent)]) : \

  ((prof)->pxformseqs[SEQREV(0)]))

#define simpxformseq(prof, intent) \

  (((prof)->pxformseqs[SEQSIM(intent)]) ? \

  ((prof)->pxformseqs[SEQSIM(intent)]) : \

  ((prof)->pxformseqs[SEQSIM(0)]))

#define gampxformseq(prof)      ((prof)->pxformseqs[SEQGAM])

static int icctoclrspc(int iccclrspc, int refflag);

static jas_cmpxform_t *jas_cmpxform_create0(void);

static jas_cmpxform_t *jas_cmpxform_createshapmat(void);

static void jas_cmshapmatlut_init(jas_cmshapmatlut_t *lut);

static int jas_cmshapmatlut_set(jas_cmshapmatlut_t *lut, jas_icccurv_t *curv);

static jas_cmpxformops_t shapmat_ops = {jas_cmshapmat_destroy, jas_cmshapmat_apply, 0};

static jas_cmprof_t *jas_cmprof_createsycc(void);

/******************************************************************************\

* Color profile class.

\******************************************************************************/

jas_cmprof_t *jas_cmprof_createfromclrspc(int clrspc)

{

        jas_iccprof_t *iccprof;

        jas_cmprof_t *prof;

        iccprof = 0;

        prof = 0;

        switch (clrspc) {

        case JAS_CLRSPC_SYCBCR:

                if (!(prof = jas_cmprof_createsycc()))

                        goto error;

                break;

        default:

                if (!(iccprof = jas_iccprof_createfromclrspc(clrspc)))

                        goto error;

                if (!(prof = jas_cmprof_createfromiccprof(iccprof)))

                        goto error;

                jas_iccprof_destroy(iccprof);

                if (!jas_clrspc_isgeneric(clrspc))

                        prof->clrspc = clrspc;

                break;

        }

        return prof;

error:

        if (iccprof)

                jas_iccprof_destroy(iccprof);

        return 0;

}

static jas_cmprof_t *jas_cmprof_createsycc()

{

        jas_cmprof_t *prof;

        jas_cmpxform_t *fwdpxform;

        jas_cmpxform_t *revpxform;

        jas_cmshapmat_t *fwdshapmat;

        jas_cmshapmat_t *revshapmat;

        int i;

        int j;

        if (!(prof = jas_cmprof_createfromclrspc(JAS_CLRSPC_SRGB)))

                goto error;

        prof->clrspc = JAS_CLRSPC_SYCBCR;

        assert(prof->numchans == 3 && prof->numrefchans == 3);

        assert(prof->refclrspc == JAS_CLRSPC_CIEXYZ);

        if (!(fwdpxform = jas_cmpxform_createshapmat()))

                goto error;

        fwdpxform->numinchans = 3;

        fwdpxform->numoutchans = 3;

        fwdshapmat = &fwdpxform->data.shapmat;

        fwdshapmat->mono = 0;

        fwdshapmat->order = 0;

        fwdshapmat->useluts = 0;

        fwdshapmat->usemat = 1;

        fwdshapmat->mat[0][0] = 1.0;

        fwdshapmat->mat[0][1] = 0.0;

        fwdshapmat->mat[0][2] = 1.402;

        fwdshapmat->mat[1][0] = 1.0;

        fwdshapmat->mat[1][1] = -0.34413;

        fwdshapmat->mat[1][2] = -0.71414;

        fwdshapmat->mat[2][0] = 1.0;

        fwdshapmat->mat[2][1] = 1.772;

        fwdshapmat->mat[2][2] = 0.0;

        fwdshapmat->mat[0][3] = -0.5 * (1.402);

        fwdshapmat->mat[1][3] = -0.5 * (-0.34413 - 0.71414);

        fwdshapmat->mat[2][3] = -0.5 * (1.772);

        if (!(revpxform = jas_cmpxform_createshapmat()))

                goto error;

        revpxform->numinchans = 3;

        revpxform->numoutchans = 3;

        revshapmat = &revpxform->data.shapmat;

        revshapmat->mono = 0;

        revshapmat->order = 1;

        revshapmat->useluts = 0;

        revshapmat->usemat = 1;

        jas_cmshapmat_invmat(revshapmat->mat, fwdshapmat->mat);

        for (i = 0; i < JAS_CMXFORM_NUMINTENTS; ++i) {

                j = SEQFWD(i);

                if (prof->pxformseqs[j]) {

                        if (jas_cmpxformseq_insertpxform(prof->pxformseqs[j], 0,

                          fwdpxform))

                                goto error;

                }

                j = SEQREV(i);

                if (prof->pxformseqs[j]) {

                        if (jas_cmpxformseq_insertpxform(prof->pxformseqs[j],

                          -1, revpxform))

                                goto error;

                }

        }

        jas_cmpxform_destroy(fwdpxform);

        jas_cmpxform_destroy(revpxform);

        return prof;

error:

        return 0;

}

jas_cmprof_t *jas_cmprof_createfromiccprof(jas_iccprof_t *iccprof)

{

        jas_cmprof_t *prof;

        jas_icchdr_t icchdr;

        jas_cmpxformseq_t *fwdpxformseq;

        jas_cmpxformseq_t *revpxformseq;

        if (!(prof = jas_cmprof_create()))

                goto error;

        jas_iccprof_gethdr(iccprof, &icchdr);

        if (!(prof->iccprof = jas_iccprof_copy(iccprof)))

                goto error;

        prof->clrspc = icctoclrspc(icchdr.colorspc, 0);

        prof->refclrspc = icctoclrspc(icchdr.refcolorspc, 1);

        prof->numchans = jas_clrspc_numchans(prof->clrspc);

        prof->numrefchans = jas_clrspc_numchans(prof->refclrspc);

        if (prof->numchans == 1) {

                if (mono(prof->iccprof, 0, &fwdpxformseq))

                        goto error;

                if (mono(prof->iccprof, 1, &revpxformseq))

                        goto error;

        } else if (prof->numchans == 3) {

                if (triclr(prof->iccprof, 0, &fwdpxformseq))

                        goto error;

                if (triclr(prof->iccprof, 1, &revpxformseq))

                        goto error;

        }

        prof->pxformseqs[SEQFWD(0)] = fwdpxformseq;

        prof->pxformseqs[SEQREV(0)] = revpxformseq;

#if 0

        if (prof->numchans > 1) {

                lut(prof->iccprof, 0, PER, &pxformseq);

                pxformseqs_set(prof, SEQFWD(PER), pxformseq);

                lut(prof->iccprof, 1, PER, &pxformseq);

                pxformseqs_set(prof, SEQREV(PER), pxformseq);

                lut(prof->iccprof, 0, CLR, &pxformseq);

                pxformseqs_set(prof, SEQREV(CLR), pxformseq);

                lut(prof->iccprof, 1, CLR, &pxformseq);

                pxformseqs_set(prof, SEQREV(CLR), pxformseq);

                lut(prof->iccprof, 0, SAT, &pxformseq);

                pxformseqs_set(prof, SEQREV(SAT), pxformseq);

                lut(prof->iccprof, 1, SAT, &pxformseq);

                pxformseqs_set(prof, SEQREV(SAT), pxformseq);

        }

#endif

        return prof;

error:

        return 0;

}

static jas_cmprof_t *jas_cmprof_create()

{

        int i;

        jas_cmprof_t *prof;

        if (!(prof = jas_malloc(sizeof(jas_cmprof_t))))

                return 0;

        memset(prof, 0, sizeof(jas_cmprof_t));

        prof->iccprof = 0;

        for (i = 0; i < JAS_CMPROF_NUMPXFORMSEQS; ++i)

                prof->pxformseqs[i] = 0;

        return prof;

}

void jas_cmprof_destroy(jas_cmprof_t *prof)

{

        int i;

        for (i = 0; i < JAS_CMPROF_NUMPXFORMSEQS; ++i) {

                if (prof->pxformseqs[i]) {

                        jas_cmpxformseq_destroy(prof->pxformseqs[i]);

                        prof->pxformseqs[i] = 0;

                }

        }

        if (prof->iccprof)

                jas_iccprof_destroy(prof->iccprof);

        jas_free(prof);

}

jas_cmprof_t *jas_cmprof_copy(jas_cmprof_t *prof)

{

        jas_cmprof_t *newprof;

        int i;

        if (!(newprof = jas_cmprof_create()))

                goto error;

        newprof->clrspc = prof->clrspc;

        newprof->numchans = prof->numchans;

        newprof->refclrspc = prof->refclrspc;

        newprof->numrefchans = prof->numrefchans;

        newprof->iccprof = jas_iccprof_copy(prof->iccprof);

        for (i = 0; i < JAS_CMPROF_NUMPXFORMSEQS; ++i) {

                if (prof->pxformseqs[i]) {

                        if (!(newprof->pxformseqs[i] = jas_cmpxformseq_copy(prof->pxformseqs[i])))

                                goto error;

                }

        }

        return newprof;

error:

        return 0;

}

/******************************************************************************\

* Transform class.

\******************************************************************************/

jas_cmxform_t *jas_cmxform_create(jas_cmprof_t *inprof, jas_cmprof_t *outprof,

  jas_cmprof_t *prfprof, int op, int intent, int optimize)

{

        jas_cmxform_t *xform;

        jas_cmpxformseq_t *inpxformseq;

        jas_cmpxformseq_t *outpxformseq;

        jas_cmpxformseq_t *altoutpxformseq;

        jas_cmpxformseq_t *prfpxformseq;

        int prfintent;

        /* Avoid compiler warnings about unused parameters. */

        optimize = 0;

        prfintent = intent;

        if (!(xform = jas_malloc(sizeof(jas_cmxform_t))))

                goto error;

        if (!(xform->pxformseq = jas_cmpxformseq_create()))

                goto error;

        switch (op) {

        case JAS_CMXFORM_OP_FWD:

                inpxformseq = fwdpxformseq(inprof, intent);

                outpxformseq = revpxformseq(outprof, intent);

                if (!inpxformseq || !outpxformseq)

                        goto error;

                if (jas_cmpxformseq_append(xform->pxformseq, inpxformseq) ||

                  jas_cmpxformseq_appendcnvt(xform->pxformseq,

                  inprof->refclrspc, outprof->refclrspc) ||

                  jas_cmpxformseq_append(xform->pxformseq, outpxformseq))

                        goto error;

                xform->numinchans = jas_clrspc_numchans(inprof->clrspc);

                xform->numoutchans = jas_clrspc_numchans(outprof->clrspc);

                break;

        case JAS_CMXFORM_OP_REV:

                outpxformseq = fwdpxformseq(outprof, intent);

                inpxformseq = revpxformseq(inprof, intent);

                if (!outpxformseq || !inpxformseq)

                        goto error;

                if (jas_cmpxformseq_append(xform->pxformseq, outpxformseq) ||

                  jas_cmpxformseq_appendcnvt(xform->pxformseq,

                  outprof->refclrspc, inprof->refclrspc) ||

                  jas_cmpxformseq_append(xform->pxformseq, inpxformseq))

                        goto error;

                xform->numinchans = jas_clrspc_numchans(outprof->clrspc);

                xform->numoutchans = jas_clrspc_numchans(inprof->clrspc);

                break;

        case JAS_CMXFORM_OP_PROOF:

                assert(prfprof);

                inpxformseq = fwdpxformseq(inprof, intent);

                prfpxformseq = fwdpxformseq(prfprof, prfintent);

                if (!inpxformseq || !prfpxformseq)

                        goto error;

                outpxformseq = simpxformseq(outprof, intent);

                altoutpxformseq = 0;

                if (!outpxformseq) {

                        outpxformseq = revpxformseq(outprof, intent);

                        altoutpxformseq = fwdpxformseq(outprof, intent);

                        if (!outpxformseq || !altoutpxformseq)

                                goto error;

                }

                if (jas_cmpxformseq_append(xform->pxformseq, inpxformseq) ||

                  jas_cmpxformseq_appendcnvt(xform->pxformseq,

                  inprof->refclrspc, outprof->refclrspc))

                        goto error;

                if (altoutpxformseq) {

                        if (jas_cmpxformseq_append(xform->pxformseq, outpxformseq) ||

                          jas_cmpxformseq_append(xform->pxformseq, altoutpxformseq))

                                goto error;

                } else {

                        if (jas_cmpxformseq_append(xform->pxformseq, outpxformseq))

                                goto error;

                }

                if (jas_cmpxformseq_appendcnvt(xform->pxformseq,

                  outprof->refclrspc, inprof->refclrspc) ||

                  jas_cmpxformseq_append(xform->pxformseq, prfpxformseq))

                        goto error;

                xform->numinchans = jas_clrspc_numchans(inprof->clrspc);

                xform->numoutchans = jas_clrspc_numchans(prfprof->clrspc);

                break;

        case JAS_CMXFORM_OP_GAMUT:

                inpxformseq = fwdpxformseq(inprof, intent);

                outpxformseq = gampxformseq(outprof);

                if (!inpxformseq || !outpxformseq)

                        goto error;

                if (jas_cmpxformseq_append(xform->pxformseq, inpxformseq) ||

                  jas_cmpxformseq_appendcnvt(xform->pxformseq,

                  inprof->refclrspc, outprof->refclrspc) ||

                  jas_cmpxformseq_append(xform->pxformseq, outpxformseq))

                        goto error;

                xform->numinchans = jas_clrspc_numchans(inprof->clrspc);

                xform->numoutchans = 1;

                break;

        }

        return xform;

error:

        return 0;

}

#define APPLYBUFSIZ     2048

int jas_cmxform_apply(jas_cmxform_t *xform, jas_cmpixmap_t *in, jas_cmpixmap_t *out)

{

        jas_cmcmptfmt_t *fmt;

        jas_cmreal_t buf[2][APPLYBUFSIZ];

        jas_cmpxformseq_t *pxformseq;

        int i;

        int j;

        int width;

        int height;

        int total;

        int n;

        jas_cmreal_t *inbuf;

        jas_cmreal_t *outbuf;

        jas_cmpxform_t *pxform;

        long *dataptr;

        int maxchans;

        int bufmax;

        int m;

        int bias;

        jas_cmreal_t scale;

        long v;

        jas_cmreal_t *bufptr;

        if (xform->numinchans > in->numcmpts || xform->numoutchans > out->numcmpts)

                goto error;

        fmt = &in->cmptfmts[0];

        width = fmt->width;

        height = fmt->height;

        for (i = 1; i < xform->numinchans; ++i) {

                fmt = &in->cmptfmts[i];

                if (fmt->width != width || fmt->height != height) {

                        goto error;

                }

        }

        for (i = 0; i < xform->numoutchans; ++i) {

                fmt = &out->cmptfmts[i];

                if (fmt->width != width || fmt->height != height) {

                        goto error;

                }

        }

        maxchans = 0;

        pxformseq = xform->pxformseq;

        for (i = 0; i < pxformseq->numpxforms; ++i) {

                pxform = pxformseq->pxforms[i];

                if (pxform->numinchans > maxchans) {

                        maxchans = pxform->numinchans;

                }

                if (pxform->numoutchans > maxchans) {

                        maxchans = pxform->numoutchans;

                }

        }

        bufmax = APPLYBUFSIZ / maxchans;

        assert(bufmax > 0);

        total = width * height;

        n = 0;

        while (n < total) {

                inbuf = &buf[0][0];

                m = JAS_MIN(total - n, bufmax);

                for (i = 0; i < xform->numinchans; ++i) {

                        fmt = &in->cmptfmts[i];

                        scale = (double)((1 << fmt->prec) - 1);

                        bias = fmt->sgnd ? (1 << (fmt->prec - 1)) : 0;

                        dataptr = &fmt->buf[n];

                        bufptr = &inbuf[i];

                        for (j = 0; j < m; ++j) {

                                if (jas_cmgetint(&dataptr, fmt->sgnd, fmt->prec, &v))

                                        goto error;

                                *bufptr = (v - bias) / scale;

                                bufptr += xform->numinchans;

                        }

                }

                inbuf = &buf[0][0];

                outbuf = inbuf;

                for (i = 0; i < pxformseq->numpxforms; ++i) {

                        pxform = pxformseq->pxforms[i];

                        if (pxform->numoutchans > pxform->numinchans) {

                                outbuf = (inbuf == &buf[0][0]) ? &buf[1][0] : &buf[0][0];

                        } else {

                                outbuf = inbuf;

                        }

                        if ((*pxform->ops->apply)(pxform, inbuf, outbuf, m))

                                goto error;

                        inbuf = outbuf;

                }

                for (i = 0; i < xform->numoutchans; ++i) {

                        fmt = &out->cmptfmts[i];

                        scale = (double)((1 << fmt->prec) - 1);

                        bias = fmt->sgnd ? (1 << (fmt->prec - 1)) : 0;

                        bufptr = &outbuf[i];

                        dataptr = &fmt->buf[n];

                        for (j = 0; j < m; ++j) {

                                v = (*bufptr) * scale + bias;

                                bufptr += xform->numoutchans;

                                if (jas_cmputint(&dataptr, fmt->sgnd, fmt->prec, v))

                                        goto error;

                        }

                }

                n += m;

        }

        return 0;

error:

        return -1;

}

void jas_cmxform_destroy(jas_cmxform_t *xform)

{

        if (xform->pxformseq)

                jas_cmpxformseq_destroy(xform->pxformseq);

        jas_free(xform);

}

/******************************************************************************\

* Primitive transform sequence class.

\******************************************************************************/

static jas_cmpxformseq_t *jas_cmpxformseq_create()

{

        jas_cmpxformseq_t *pxformseq;

        pxformseq = 0;

        if (!(pxformseq = jas_malloc(sizeof(jas_cmpxformseq_t))))

                goto error;

        pxformseq->pxforms = 0;

        pxformseq->numpxforms = 0;

        pxformseq->maxpxforms = 0;

        if (jas_cmpxformseq_resize(pxformseq, 16))

                goto error;

        return pxformseq;

error:

        if (pxformseq)

                jas_cmpxformseq_destroy(pxformseq);

        return 0;

}

static jas_cmpxformseq_t *jas_cmpxformseq_copy(jas_cmpxformseq_t *pxformseq)

{

        jas_cmpxformseq_t *newpxformseq;

        if (!(newpxformseq = jas_cmpxformseq_create()))

                goto error;

        if (jas_cmpxformseq_append(newpxformseq, pxformseq))

                goto error;

        return newpxformseq;

error:

        return 0;

}

static void jas_cmpxformseq_destroy(jas_cmpxformseq_t *pxformseq)

{

        while (pxformseq->numpxforms > 0)

                jas_cmpxformseq_delete(pxformseq, pxformseq->numpxforms - 1);

        if (pxformseq->pxforms)

                jas_free(pxformseq->pxforms);

        jas_free(pxformseq);

}

static int jas_cmpxformseq_delete(jas_cmpxformseq_t *pxformseq, int i)

{

        assert(i >= 0 && i < pxformseq->numpxforms);

        if (i != pxformseq->numpxforms - 1)

                abort();

        jas_cmpxform_destroy(pxformseq->pxforms[i]);

        pxformseq->pxforms[i] = 0;

        --pxformseq->numpxforms;

        return 0;

}

static int jas_cmpxformseq_appendcnvt(jas_cmpxformseq_t *pxformseq,

  int dstclrspc, int srcclrspc)

{

        if (dstclrspc == srcclrspc)

                return 0;

        abort();

        /* Avoid compiler warnings about unused parameters. */

        pxformseq = 0;

        return -1;

}

static int jas_cmpxformseq_insertpxform(jas_cmpxformseq_t *pxformseq,

  int i, jas_cmpxform_t *pxform)

{

        jas_cmpxform_t *tmppxform;

        int n;

        if (i < 0)

                i = pxformseq->numpxforms;

        assert(i >= 0 && i <= pxformseq->numpxforms);

        if (pxformseq->numpxforms >= pxformseq->maxpxforms) {

                if (jas_cmpxformseq_resize(pxformseq, pxformseq->numpxforms +

                  16))

                        goto error;

        }

        assert(pxformseq->numpxforms < pxformseq->maxpxforms);

        if (!(tmppxform = jas_cmpxform_copy(pxform)))

                goto error;

        n = pxformseq->numpxforms - i;

        if (n > 0) {

                memmove(&pxformseq->pxforms[i + 1], &pxformseq->pxforms[i],

                  n * sizeof(jas_cmpxform_t *));

        }

        pxformseq->pxforms[i] = tmppxform;

        ++pxformseq->numpxforms;

        return 0;

error:

        return -1;

}

static int jas_cmpxformseq_append(jas_cmpxformseq_t *pxformseq,

  jas_cmpxformseq_t *othpxformseq)

{

        int n;

        int i;

        jas_cmpxform_t *pxform;

        jas_cmpxform_t *othpxform;

        n = pxformseq->numpxforms + othpxformseq->numpxforms;

        if (n > pxformseq->maxpxforms) {

                if (jas_cmpxformseq_resize(pxformseq, n))

                        goto error;

        }

        for (i = 0; i < othpxformseq->numpxforms; ++i) {

                othpxform = othpxformseq->pxforms[i];

                if (!(pxform = jas_cmpxform_copy(othpxform)))

                        goto error;

                pxformseq->pxforms[pxformseq->numpxforms] = pxform;

                ++pxformseq->numpxforms;

        }

        return 0;

error:

        return -1;

}

static int jas_cmpxformseq_resize(jas_cmpxformseq_t *pxformseq, int n)

{

        jas_cmpxform_t **p;

        assert(n >= pxformseq->numpxforms);

        p = (!pxformseq->pxforms) ? jas_malloc(n * sizeof(jas_cmpxform_t *)) :

          jas_realloc(pxformseq->pxforms, n * sizeof(jas_cmpxform_t *));

        if (!p) {

                return -1;

        }

        pxformseq->pxforms = p;

        pxformseq->maxpxforms = n;

        return 0;

}

/******************************************************************************\

* Primitive transform class.

\******************************************************************************/

static jas_cmpxform_t *jas_cmpxform_create0()

{