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/* Copyright (C) 1994, 1996, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
This software is licensed to a single customer by Artifex Software Inc.
under the terms of a specific OEM agreement.
*/
/*$RCSfile$ $Revision$ */
/* Separation color space support */
#include "memory_.h"
#include "ghost.h"
#include "oper.h"
#include "gsstruct.h"
#include "gscolor.h"
#include "gsmatrix.h" /* for gxcolor2.h */
#include "gscsepr.h"
#include "gxcspace.h"
#include "gxfixed.h" /* ditto */
#include "gxcolor2.h"
#include "estack.h"
#include "ialloc.h"
#include "icsmap.h"
#include "igstate.h"
#include "ivmspace.h"
#include "store.h"
/* Imported from gscsepr.c */
extern const gs_color_space_type gs_color_space_type_Separation;
/* Forward references */
private int separation_map1(P1(i_ctx_t *));
/* Define the separation cache size. This makes many useful tint values */
/* map to integer cache indices. */
#define SEPARATION_CACHE_SIZE 360
/* Tint transform procedure that just consults the cache. */
private int
lookup_tint(const gs_separation_params * params, floatp tint, float *values)
{
int m = cs_num_components((const gs_color_space *)¶ms->alt_space);
const gs_indexed_map *map = params->map;
int value_index =
(tint < 0 ? 0 : tint > 1 ? map->num_values - m :
(int)(tint * SEPARATION_CACHE_SIZE + 0.5) * m);
const float *pv = &map->values[value_index];
memcpy(values, pv, sizeof(*values) * m);
return 0;
}
/* <array> .setseparationspace - */
/* The current color space is the alternate space for the separation space. */
private int
zsetseparationspace(i_ctx_t *i_ctx_p)
{
os_ptr op = osp;
const ref *pcsa;
gs_color_space cs;
ref_colorspace cspace_old;
uint edepth = ref_stack_count(&e_stack);
gs_indexed_map *map;
int code;
check_read_type(*op, t_array);
if (r_size(op) != 4)
return_error(e_rangecheck);
pcsa = op->value.const_refs + 1;
switch (r_type(pcsa)) {
default:
return_error(e_typecheck);
case t_string:
case t_name:
;
}
check_proc(pcsa[2]);
cs = *gs_currentcolorspace(igs);
if (!cs.type->can_be_alt_space)
return_error(e_rangecheck);
code = zcs_begin_map(i_ctx_p, &map, &pcsa[2], SEPARATION_CACHE_SIZE + 1,
(const gs_direct_color_space *)&cs,
separation_map1);
if (code < 0)
return code;
map->proc.tint_transform = lookup_tint;
/* See zcsindex.c for why we use memmove here. */
memmove(&cs.params.separation.alt_space, &cs,
sizeof(cs.params.separation.alt_space));
gs_cspace_init(&cs, &gs_color_space_type_Separation, NULL);
cs.params.separation.map = map;
cspace_old = istate->colorspace;
istate->colorspace.procs.special.separation.layer_name = pcsa[0];
istate->colorspace.procs.special.separation.tint_transform = pcsa[2];
code = gs_setcolorspace(igs, &cs);
if (code < 0) {
istate->colorspace = cspace_old;
ref_stack_pop_to(&e_stack, edepth);
return code;
}
pop(1);
return (ref_stack_count(&e_stack) == edepth ? 0 : o_push_estack); /* installation will load the caches */
}
/* Continuation procedure for saving transformed tint values. */
private int
separation_map1(i_ctx_t *i_ctx_p)
{
os_ptr op = osp;
es_ptr ep = esp;
int i = (int)ep[csme_index].value.intval;
if (i >= 0) { /* i.e., not first time */
int m = (int)ep[csme_num_components].value.intval;
int code = float_params(op, m, &r_ptr(&ep[csme_map], gs_indexed_map)->values[i * m]);
if (code < 0)
return code;
pop(m);
op -= m;
if (i == (int)ep[csme_hival].value.intval) { /* All done. */
esp -= num_csme;
return o_pop_estack;
}
}
push(1);
ep[csme_index].value.intval = ++i;
make_real(op, i / (float)SEPARATION_CACHE_SIZE);
make_op_estack(ep + 1, separation_map1);
ep[2] = ep[csme_proc]; /* tint_transform */
esp = ep + 2;
return o_push_estack;
}
/* - currentoverprint <bool> */
private int
zcurrentoverprint(i_ctx_t *i_ctx_p)
{
os_ptr op = osp;
push(1);
make_bool(op, gs_currentoverprint(igs));
return 0;
}
/* <bool> setoverprint - */
private int
zsetoverprint(i_ctx_t *i_ctx_p)
{
os_ptr op = osp;
check_type(*op, t_boolean);
gs_setoverprint(igs, op->value.boolval);
pop(1);
return 0;
}
/* ------ Initialization procedure ------ */
const op_def zcssepr_l2_op_defs[] =
{
op_def_begin_level2(),
{"0currentoverprint", zcurrentoverprint},
{"1setoverprint", zsetoverprint},
{"1.setseparationspace", zsetseparationspace},
/* Internal operators */
{"1%separation_map1", separation_map1},
op_def_end(0)
};
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