/* Copyright (C) 2001-2023 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
   CA 94129, USA, for further information.
*/


/* ICCBased color operators */

#include "math_.h"
#include "memory_.h"
#include "ghost.h"
#include "oper.h"
#include "gsstruct.h"
#include "gxcspace.h"		/* gscolor2.h requires gscspace.h */
#include "stream.h"
#include "files.h"
#include "gscolor2.h"
#include "gsicc.h"
#include "estack.h"
#include "idict.h"
#include "idparam.h"
#include "igstate.h"
#include "icie.h"
#include "ialloc.h"
#include "store.h"
#include "zicc.h"
#include "gsicc_manage.h"
#include "gx.h"
#include "gxgstate.h"
#include "gsicc_create.h"
#include "gsicc_profilecache.h"
#include "gxdevice.h"  /* for output intent setting */
#include "gsicc_cache.h"

int seticc(i_ctx_t * i_ctx_p, int ncomps, ref *ICCdict, float *range_buff)
{
    int                     code, k;
    gs_color_space *        pcs;
    ref *                   pstrmval;
    ref *                   phashval = NULL;
    stream *                s = 0L;
    cmm_profile_t           *picc_profile = NULL;
    int                     i, expected = 0;
    ref *                   pnameval;
    static const char *const icc_std_profile_names[] = {
            GSICC_STANDARD_PROFILES
        };
    static const char *const icc_std_profile_keys[] = {
            GSICC_STANDARD_PROFILES_KEYS
        };

    /* If we are override ICC mode, we won't use the profile */
    if (!gs_currentoverrideicc(igs) &&
        dict_find_string(ICCdict, ".hash", &phashval) == 1 &&
        r_has_type(phashval, t_integer)) {
        pcs = gsicc_find_cs(phashval->value.intval, igs);
        if (pcs != NULL && gs_color_space_num_components(pcs) == ncomps) {
            /* Set the color space.  We are done. */
            code = gs_setcolorspace(igs, pcs);
            /* Remove the ICC dict from the stack */
            ref_stack_pop(&o_stack, 1);
            return code;
        }
    }

    /* verify the DataSource entry */
    if (dict_find_string(ICCdict, "DataSource", &pstrmval) <= 0)
        return_error(gs_error_undefined);
    check_read_file(i_ctx_p, s, pstrmval);

    /* build the color space object */
    code = gs_cspace_build_ICC(&pcs, NULL, gs_gstate_memory(igs)->stable_memory);
    if (code < 0)
        return gs_rethrow(code, "building color space object");
    /*  For now, dump the profile into a buffer
        and obtain handle from the buffer when we need it.
        We may want to change this later.
        This depends to some degree on what the CMS is capable of doing.
        I don't want to get bogged down on stream I/O at this point.
        Note also, if we are going to be putting these into the clist we will
        want to have this buffer. */
    /* Check if we have the /Name entry.  This is used to associate with
       specs that have enumerated types to indicate sRGB sGray etc */
    if (dict_find_string(ICCdict, "Name", &pnameval) > 0 && r_has_type(pnameval, t_string)){
        uint size = r_size(pnameval);
        char *str = (char *)gs_alloc_bytes(gs_gstate_memory(igs), size+1, "seticc");
        memcpy(str, (const char *)pnameval->value.bytes, size);
        str[size] = 0;

        /* Compare this to the standard profile names */
        for (k = 0; k < GSICC_NUMBER_STANDARD_PROFILES; k++) {
            if ( strcmp( str, icc_std_profile_keys[k] ) == 0 ) {
                picc_profile = gsicc_get_profile_handle_file(icc_std_profile_names[k],
                    strlen(icc_std_profile_names[k]), gs_gstate_memory(igs));
                break;
            }
        }
        gs_free_object(gs_gstate_memory(igs), str, "seticc");
    } else {
        picc_profile = gsicc_profile_new(s, gs_gstate_memory(igs), NULL, 0);
        if (picc_profile == NULL)
            return gs_throw(gs_error_VMerror, "Creation of ICC profile failed");
        /* We have to get the profile handle due to the fact that we need to know
           if it has a data space that is CIELAB */
        picc_profile->profile_handle =
            gsicc_get_profile_handle_buffer(picc_profile->buffer,
                                            picc_profile->buffer_size,
                                            gs_gstate_memory(igs));
    }
    if (picc_profile == NULL || picc_profile->profile_handle == NULL) {
        /* Free up everything, the profile is not valid. We will end up going
           ahead and using a default based upon the number of components */
        rc_decrement(picc_profile,"seticc");
        rc_decrement(pcs,"seticc");
        return -1;
    }
    code = gsicc_set_gscs_profile(pcs, picc_profile, gs_gstate_memory(igs));
    if (code < 0) {
        rc_decrement(picc_profile,"seticc");
        rc_decrement(pcs,"seticc");
        return code;
    }
    picc_profile->num_comps = ncomps;

    picc_profile->data_cs =
        gscms_get_profile_data_space(picc_profile->profile_handle,
            picc_profile->memory);
    switch (picc_profile->data_cs) {
        case gsCIEXYZ:
        case gsCIELAB:
        case gsRGB:
            expected = 3;
            break;
        case gsGRAY:
            expected = 1;
            break;
        case gsCMYK:
            expected = 4;
            break;
        case gsNCHANNEL:
        case gsNAMED:            /* Silence warnings */
        case gsUNDEFINED:        /* Silence warnings */
            break;
    }
    if (!expected || ncomps != expected) {
        rc_decrement(picc_profile,"seticc");
        rc_decrement(pcs,"seticc");
        return_error(gs_error_rangecheck);
    }

    /* Lets go ahead and get the hash code and check if we match one of the default spaces */
    /* Later we may want to delay this, but for now lets go ahead and do it */
    gsicc_init_hash_cs(picc_profile, igs);

    /* Set the range according to the data type that is associated with the
       ICC input color type.  Occasionally, we will run into CIELAB to CIELAB
       profiles for spot colors in PDF documents. These spot colors are typically described
       as separation colors with tint transforms that go from a tint value
       to a linear mapping between the CIELAB white point and the CIELAB tint
       color.  This results in a CIELAB value that we need to use to fill.  We
       need to detect this to make sure we do the proper scaling of the data.  For
       CIELAB images in PDF, the source is always normal 8 or 16 bit encoded data
       in the range from 0 to 255 or 0 to 65535.  In that case, there should not
       be any encoding and decoding to CIELAB.  The PDF content will not include
       an ICC profile but will set the color space to \Lab.  In this case, we use
       our seticc_lab operation to install the LAB to LAB profile, but we detect
       that we did that through the use of the is_lab flag in the profile descriptor.
       When then avoid the CIELAB encode and decode */
    if (picc_profile->data_cs == gsCIELAB) {
    /* If the input space to this profile is CIELAB, then we need to adjust the limits */
        /* See ICC spec ICC.1:2004-10 Section 6.3.4.2 and 6.4.  I don't believe we need to
           worry about CIEXYZ profiles or any of the other odds ones.  Need to check that though
           at some point. */
        picc_profile->Range.ranges[0].rmin = 0.0;
        picc_profile->Range.ranges[0].rmax = 100.0;
        picc_profile->Range.ranges[1].rmin = -128.0;
        picc_profile->Range.ranges[1].rmax = 127.0;
        picc_profile->Range.ranges[2].rmin = -128.0;
        picc_profile->Range.ranges[2].rmax = 127.0;
        picc_profile->islab = true;
    } else {
        for (i = 0; i < ncomps; i++) {
            picc_profile->Range.ranges[i].rmin = range_buff[2 * i];
            picc_profile->Range.ranges[i].rmax = range_buff[2 * i + 1];
        }
    }
    /* Now see if we are in an overide situation.  We have to wait until now
       in case this is an LAB profile which we will not overide */
    if (gs_currentoverrideicc(igs) && picc_profile->data_cs != gsCIELAB) {
        /* Free up the profile structure */
        switch( picc_profile->data_cs ) {
            case gsRGB:
                pcs->cmm_icc_profile_data = igs->icc_manager->default_rgb;
                break;
            case gsGRAY:
                pcs->cmm_icc_profile_data = igs->icc_manager->default_gray;
                break;
            case gsCMYK:
                pcs->cmm_icc_profile_data = igs->icc_manager->default_cmyk;
                break;
            default:
                break;
        }
        /* Have one increment from the color space.  Having these tied
           together is not really correct.  Need to fix that.  ToDo.  MJV */
        rc_adjust(picc_profile, -2, "seticc");	/* NB: May free the profile and set picc_profile to 0 */
        rc_increment(pcs->cmm_icc_profile_data);
    }
    /* Set the color space.  We are done. */
    code = gs_setcolorspace(igs, pcs);
    /* The context has taken a reference to the colorspace. We no longer need
     * ours, so drop it. */
    rc_decrement_only(pcs, "seticc");
    if (picc_profile != NULL) {
        /* In this case, we already have a ref count of 2 on the icc profile
           one for when it was created and one for when it was set.  We really
           only want one here so adjust */
        rc_decrement(picc_profile,"seticc");
        if (code >= 0) {
            /* Save this colorspace in the iccprofile_cache */
            gsicc_add_cs(igs, pcs, picc_profile->hashcode);
            /* should be an integer, but if for some reason it isn't, don't update */
            if (phashval && r_has_type(phashval, t_integer))
                phashval->value.intval = picc_profile->hashcode;
        }
    }
    /* Remove the ICC dict from the stack */
    ref_stack_pop(&o_stack, 1);
    return code;
}

/*
 *   <dict>  .set_outputintent  -
 *
 * Set and use the specified output intent.
 *
 */
static int
zset_outputintent(i_ctx_t * i_ctx_p)
{
    os_ptr                  op = osp;
    int                     code = 0;
    gx_device *dev = gs_currentdevice(igs);
    cmm_dev_profile_t       *dev_profile;
    stream *                s = 0L;
    ref *                   pnval;
    ref *                   pstrmval;
    int                     ncomps, dev_comps;
    cmm_profile_t           *picc_profile;
    int                     expected = 0;
    gs_color_space_index    index;
    gsicc_manager_t         *icc_manager = igs->icc_manager;
    cmm_profile_t           *source_profile = NULL;

    check_op(1);
    check_type(*op, t_dictionary);
    check_dict_read(*op);
    if_debug0m(gs_debug_flag_icc, imemory, "[icc] Using OutputIntent\n");

    /* Get the device structure */
    code = dev_proc(dev, get_profile)(dev,  &dev_profile);
    if (code < 0)
        return code;

    if (dev_profile == NULL) {
        code = gsicc_init_device_profile_struct(dev, NULL, 0);
        if (code < 0)
            return code;
        code = dev_proc(dev, get_profile)(dev,  &dev_profile);
        if (code < 0)
            return code;
    }
    if (dev_profile->oi_profile != NULL) {
        return 0;  /* Allow only one setting of this object */
    }
    code = dict_find_string(op, "N", &pnval);
    if (code < 0)
        return code;
    if (code == 0)
        return_error(gs_error_undefined);
    if (r_type(pnval) != t_integer)
        return gs_note_error(gs_error_typecheck);
    ncomps = pnval->value.intval;

    /* verify the DataSource entry. Creat profile from stream */
    if (dict_find_string(op, "DataSource", &pstrmval) <= 0)
        return_error(gs_error_undefined);
    check_read_file(i_ctx_p, s, pstrmval);

    picc_profile = gsicc_profile_new(s, gs_gstate_memory(igs), NULL, 0);
    if (picc_profile == NULL)
        return gs_throw(gs_error_VMerror, "Creation of ICC profile failed");
    picc_profile->num_comps = ncomps;
    picc_profile->profile_handle =
        gsicc_get_profile_handle_buffer(picc_profile->buffer,
                                        picc_profile->buffer_size,
                                        gs_gstate_memory(igs));
    if (picc_profile->profile_handle == NULL) {
        rc_decrement(picc_profile,"zset_outputintent");
        return -1;
    }
    picc_profile->data_cs =
        gscms_get_profile_data_space(picc_profile->profile_handle,
            picc_profile->memory);
    switch (picc_profile->data_cs) {
        case gsCIEXYZ:
        case gsCIELAB:
        case gsRGB:
            expected = 3;
            source_profile = icc_manager->default_rgb;
            break;
        case gsGRAY:
            expected = 1;
            source_profile = icc_manager->default_gray;
            break;
        case gsCMYK:
            expected = 4;
            source_profile = icc_manager->default_cmyk;
            break;
        case gsNCHANNEL:
            expected = 0;
            break;
        case gsNAMED:
        case gsUNDEFINED:
            break;
    }
    if (expected && ncomps != expected) {
        rc_decrement(picc_profile,"zset_outputintent");
        return_error(gs_error_rangecheck);
    }
    gsicc_init_hash_cs(picc_profile, igs);

    /* All is well with the profile.  Lets set the stuff that needs to be set */
    dev_profile->oi_profile = picc_profile;
    picc_profile->name = (char *) gs_alloc_bytes(picc_profile->memory,
                                                 MAX_DEFAULT_ICC_LENGTH,
                                                 "zset_outputintent");
    strncpy(picc_profile->name, OI_PROFILE, strlen(OI_PROFILE));
    picc_profile->name[strlen(OI_PROFILE)] = 0;
    picc_profile->name_length = strlen(OI_PROFILE);
    /* Set the range of the profile */
    gsicc_set_icc_range(&picc_profile);

    /* If the output device has a different number of componenets, then we are
       going to set the output intent as the proofing profile, unless the
       proofing profile has already been set.

       If the device has the same number of components (and color model) then as
       the profile we will use this as the output profile, unless someone has
       explicitly set the output profile.

       Finally, we will use the output intent profile for the default profile
       of the proper Device profile in the icc manager, again, unless someone
       has explicitly set this default profile. */

    dev_comps = dev_profile->device_profile[GS_DEFAULT_DEVICE_PROFILE]->num_comps;
    index = gsicc_get_default_type(dev_profile->device_profile[GS_DEFAULT_DEVICE_PROFILE]);
    if (ncomps == dev_comps && index < gs_color_space_index_DevicePixel) {
        /* The OI profile is the same type as the profile for the device and a
           "default" profile for the device was not externally set. So we go
           ahead and use the OI profile as the device profile.  Care needs to be
           taken here to keep from screwing up any device parameters.   We will
           use a keyword of OIProfile for the user/device parameter to indicate
           its usage.  Also, note conflicts if one is setting object dependent
           color management */
        rc_assign(dev_profile->device_profile[GS_DEFAULT_DEVICE_PROFILE], picc_profile,
                  "zset_outputintent");
        if_debug0m(gs_debug_flag_icc, imemory, "[icc] OutputIntent used for device profile\n");
    } else {
        if (dev_profile->proof_profile == NULL) {
            /* This means that we should use the OI profile as the proofing
               profile.  Note that if someone already has specified a
               proofing profile it is unclear what they are trying to do
               with the output intent.  In this case, we will use it
               just for the source data below */
            dev_profile->proof_profile = picc_profile;
            rc_increment(picc_profile);
            if_debug0m(gs_debug_flag_icc, imemory, "[icc] OutputIntent used for proof profile\n");
        }
    }
    /* Now the source colors.  See which source color space needs to use the
       output intent ICC profile */
    index = gsicc_get_default_type(source_profile);
    if (index < gs_color_space_index_DevicePixel) {
        /* source_profile is currently the default.  Set it to the OI profile */
        switch (picc_profile->data_cs) {
            case gsGRAY:
                if_debug0m(gs_debug_flag_icc, imemory, "[icc] OutputIntent used source Gray\n");
                rc_assign(icc_manager->default_gray, picc_profile,
                          "zset_outputintent");
                break;
            case gsRGB:
                if_debug0m(gs_debug_flag_icc, imemory, "[icc] OutputIntent used source RGB\n");
                rc_assign(icc_manager->default_rgb, picc_profile,
                          "zset_outputintent");
                break;
            case gsCMYK:
                if_debug0m(gs_debug_flag_icc, imemory, "[icc] OutputIntent used source CMYK\n");
                rc_assign(icc_manager->default_cmyk, picc_profile,
                          "zset_outputintent");
                break;
            default:
                break;
        }
    }
    /* Remove the output intent dict from the stack */
    pop(1);
    return code;
}

/* Install a ICC type color space and use the ICC LABLUT profile. */
int
seticc_lab(i_ctx_t * i_ctx_p, float *white, float *black, float *range_buff)
{
    int                     code;
    gs_color_space *        pcs;
    int                     i;

    /* build the color space object */
    code = gs_cspace_build_ICC(&pcs, NULL, gs_gstate_memory(igs));
    if (code < 0)
        return gs_rethrow(code, "building color space object");
    /* record the current space as the alternative color space */
    /* Get the lab profile.  It may already be set in the icc manager.
       If not then lets populate it.  */
    if (igs->icc_manager->lab_profile == NULL ) {
        /* This can't happen as the profile
           should be initialized during the
           setting of the user params */
        return gs_rethrow(code, "cannot find lab icc profile");
    }
    /* Assign the LAB to LAB profile to this color space */
    code = gsicc_set_gscs_profile(pcs, igs->icc_manager->lab_profile, gs_gstate_memory(igs));
    if (code < 0)
        return gs_rethrow(code, "installing the lab profile");
    pcs->cmm_icc_profile_data->Range.ranges[0].rmin = 0.0;
    pcs->cmm_icc_profile_data->Range.ranges[0].rmax = 100.0;
    for (i = 1; i < 3; i++) {
        pcs->cmm_icc_profile_data->Range.ranges[i].rmin =
            range_buff[2 * (i-1)];
        pcs->cmm_icc_profile_data->Range.ranges[i].rmax =
            range_buff[2 * (i-1) + 1];
    }
    /* Set the color space.  We are done.  */
    code = gs_setcolorspace(igs, pcs);
    return code;
}

/* Install an ICC space from the PDF CalRGB or CalGray types */
int
seticc_cal(i_ctx_t * i_ctx_p, float *white, float *black, float *gamma,
           float *matrix, int num_colorants, ulong dictkey)
{
    int                     code;
    gs_color_space *        pcs;
    gs_memory_t             *mem = igs->memory;
    int                     i;
    cmm_profile_t           *cal_profile;

    /* See if the color space is in the profile cache */
    pcs = gsicc_find_cs(dictkey, igs);
    if (pcs != NULL && gs_color_space_num_components(pcs) != num_colorants) {
        pcs = NULL;
        dictkey = 0;
    }
    if (pcs == NULL ) {
        /* build the color space object.  Since this is cached
           in the profile cache which is a member variable
           of the graphic state, we will want to use stable
           memory here */
        code = gs_cspace_build_ICC(&pcs, NULL, mem->stable_memory);
        if (code < 0)
            return gs_rethrow(code, "building color space object");
        /* There is no alternate for this.  Perhaps we should set DeviceRGB? */
        pcs->base_space = NULL;
        /* Create the ICC profile from the CalRGB or CalGray parameters */
        cal_profile = gsicc_create_from_cal(white, black, gamma, matrix,
                                            mem->stable_memory, num_colorants);
        if (cal_profile == NULL)
            return gs_rethrow(gs_error_VMerror, "creating the cal profile failed");
        /* Assign the profile to this color space */
        code = gsicc_set_gscs_profile(pcs, cal_profile, mem->stable_memory);
        /* profile is created with ref count of 1, gsicc_set_gscs_profile()
         * increments the ref count, so we need to decrement it here.
         */
        rc_decrement(cal_profile, "seticc_cal");
        if (code < 0)
            return gs_rethrow(code, "installing the cal profile");
        for (i = 0; i < num_colorants; i++) {
            pcs->cmm_icc_profile_data->Range.ranges[i].rmin = 0;
            pcs->cmm_icc_profile_data->Range.ranges[i].rmax = 1;
        }
        /* Add the color space to the profile cache */
        gsicc_add_cs(igs, pcs,dictkey);
    }
    /* Set the color space.  We are done.  */
    code = gs_setcolorspace(igs, pcs);
    return code;
}

static int
znumicc_components(i_ctx_t * i_ctx_p)
{
    ref *                   pnval;
    ref *                   pstrmval;
    stream *                s;
    int                     ncomps, expected = 0, code;
    cmm_profile_t           *picc_profile;
    os_ptr                  op = osp;

    check_op(1);
    check_type(*op, t_dictionary);
    check_dict_read(*op);

    code = dict_find_string(op, "N", &pnval);
    if (code < 0)
        return code;
    if (code == 0)
        return_error(gs_error_undefined);
    if (r_type(pnval) != t_integer)
        return gs_note_error(gs_error_typecheck);
    ncomps = pnval->value.intval;
    /* verify the DataSource entry. Create profile from stream */
    if (dict_find_string(op, "DataSource", &pstrmval) <= 0)
        return_error(gs_error_undefined);
    check_read_file(i_ctx_p, s, pstrmval);

    picc_profile = gsicc_profile_new(s, gs_gstate_memory(igs), NULL, 0);
    if (picc_profile == NULL)
        return gs_throw(gs_error_VMerror, "Creation of ICC profile failed");

    picc_profile->num_comps = ncomps;
    picc_profile->profile_handle =
        gsicc_get_profile_handle_buffer(picc_profile->buffer,
                                        picc_profile->buffer_size,
                                        gs_gstate_memory(igs));
    if (picc_profile->profile_handle == NULL) {
        rc_decrement(picc_profile,"znumicc_components");
        make_int(op, expected);
        return 0;
    }
    picc_profile->data_cs =
        gscms_get_profile_data_space(picc_profile->profile_handle,
            picc_profile->memory);

    switch (picc_profile->data_cs) {
        case gsCIEXYZ:
        case gsCIELAB:
        case gsRGB:
            expected = 3;
            break;
        case gsGRAY:
            expected = 1;
            break;
        case gsCMYK:
            expected = 4;
            break;
        case gsNCHANNEL:
            expected = 0;
            break;
        case gsNAMED:
        case gsUNDEFINED:
            expected = -1;
            break;
    }

    make_int(op, expected);

    rc_decrement(picc_profile,"zset_outputintent");
    return 0;
}

const op_def    zicc_op_defs[] = {
    { "1.set_outputintent", zset_outputintent },
    { "1.numicc_components", znumicc_components },
    op_def_end(0)
};
