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/*
This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2012 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "system.h"
#include "mem.h"
#include "error.h"
#include "dpxutil.h"
#include "pdfdev.h"
#include "pdfcolor.h"
#include "specials.h"
#include "spc_util.h"
#include "spc_color.h"
/* Color stack is actually placed into pdfcolor.c.
* The reason why we need to place stack there is
* that we must reinstall color after grestore and
* other operations that can change current color
* implicitely.
*/
int
spc_color_at_begin_page (void)
{
return 0;
}
int
spc_color_at_end_page (void)
{
return 0;
}
int
spc_color_at_begin_document (void)
{
return 0;
}
int
spc_color_at_end_document (void)
{
return 0;
}
static int
spc_handler_color_push (struct spc_env *spe, struct spc_arg *args)
{
int error;
pdf_color colorspec;
error = spc_util_read_colorspec(spe, &colorspec, args, 1);
if (!error) {
pdf_color_push(&colorspec, &colorspec);
}
return error;
}
static int
spc_handler_color_pop (struct spc_env *spe, struct spc_arg *args)
{
pdf_color_pop();
return 0;
}
/* Invoked by the special command "color rgb .625 0 0".
* DVIPS clears the color stack, and then saves and sets the given color.
*/
static int
spc_handler_color_default (struct spc_env *spe, struct spc_arg *args)
{
int error;
pdf_color colorspec;
error = spc_util_read_colorspec(spe, &colorspec, args, 1);
if (!error) {
pdf_color_set_default(&colorspec);
pdf_color_clear_stack(); /* the default color is saved on color_stack */
pdf_color_push(&colorspec, &colorspec);
}
return error;
}
/* This is from color special? */
#include "pdfdoc.h"
static int
spc_handler_background (struct spc_env *spe, struct spc_arg *args)
{
int error;
pdf_color colorspec;
error = spc_util_read_colorspec(spe, &colorspec, args, 1);
if (!error)
pdf_doc_set_bgcolor(&colorspec);
return error;
}
#ifndef ISBLANK
#define ISBLANK(c) ((c) == ' ' || (c) == '\t' || (c) == '\v')
#endif
static void
skip_blank (const char **pp, const char *endptr)
{
const char *p = *pp;
for ( ; p < endptr && ISBLANK(*p); p++);
*pp = p;
}
int
spc_color_check_special (const char *buf, long len)
{
int r = 0;
char *q;
const char *p, *endptr;
p = buf;
endptr = p + len;
skip_blank(&p, endptr);
q = parse_c_ident(&p, endptr);
if (!q)
return 0;
else if (!strcmp(q, "color"))
r = 1;
else if (!strcmp(q, "background")) {
r = 1;
}
RELEASE(q);
return r;
}
int
spc_color_setup_handler (struct spc_handler *sph,
struct spc_env *spe, struct spc_arg *ap)
{
const char *p;
char *q;
ASSERT(sph && spe && ap);
skip_blank(&ap->curptr, ap->endptr);
q = parse_c_ident(&ap->curptr, ap->endptr);
if (!q)
return -1;
skip_blank(&ap->curptr, ap->endptr);
if (!strcmp(q, "background")) {
ap->command = "background";
sph->exec = &spc_handler_background;
RELEASE(q);
} else if (!strcmp(q, "color")) { /* color */
RELEASE(q);
p = ap->curptr;
q = parse_c_ident(&p, ap->endptr);
if (!q)
return -1;
else if (!strcmp(q, "push")) {
ap->command = "push";
sph->exec = &spc_handler_color_push;
ap->curptr = p;
} else if (!strcmp(q, "pop")) {
ap->command = "pop";
sph->exec = &spc_handler_color_pop;
ap->curptr = p;
} else { /* cmyk, rgb, ... */
ap->command = "";
sph->exec = &spc_handler_color_default;
}
RELEASE(q);
} else {
spc_warn(spe, "Not color/background special?");
RELEASE(q);
return -1;
}
skip_blank(&ap->curptr, ap->endptr);
return 0;
}
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