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output-epd.c
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output-epd.c
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/* output-epd.c: utility routines for EPD output
(http://epd.sourceforge.net)
Copyright (C) 1999, 2000, 2001 Martin Weber.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* Def: HAVE_CONFIG_H */
#include "types.h"
#include "spline.h"
#include "color.h"
#include "output-epd.h"
#include "xstd.h"
#include "autotrace.h"
#include <time.h>
#include <string.h>
static at_string now (void);
#define SIGN(x) ((x) > 0 ? 1 : (x) < 0 ? -1 : 0)
#define ROUND(x) ((int) ((int) (x) + .5 * SIGN (x)))
/* Output macros. */
/* This should be used for outputting a string S on a line by itself. */
#define OUT_LINE(s) \
fprintf (epd_file, "%s\n", s)
/* These output their arguments, preceded by the indentation. */
#define OUT1(s, e) \
fprintf (epd_file, s, e)
#define OUT2(s, e1, e2) \
fprintf (epd_file, s, e1, e2)
#define OUT3(s, e1, e2, e3) \
fprintf (epd_file, s, e1, e2, e3)
#define OUT4(s, e1, e2, e3, e4) \
fprintf (epd_file, s, e1, e2, e3, e4)
/* These macros just output their arguments. */
#define OUT_STRING(s) fprintf (epd_file, "%s", s)
#define OUT_REAL(r) fprintf (epd_file, r == (ROUND (r = ROUND((at_real)6.0*r)/(at_real)6.0)) \
? "%.0f " : "%.3f ", r)
/* For a PostScript command with two real arguments, e.g., lineto. OP
should be a constant string. */
#define OUT_COMMAND2(first, second, op) \
do \
{ \
OUT_REAL (first); \
OUT_REAL (second); \
OUT_STRING (op "\n"); \
} \
while (0)
/* For a PostScript command with six real arguments, e.g., curveto.
Again, OP should be a constant string. */
#define OUT_COMMAND6(first, second, third, fourth, fifth, sixth, op) \
do \
{ \
OUT_REAL (first); \
OUT_REAL (second); \
OUT_STRING (" "); \
OUT_REAL (third); \
OUT_REAL (fourth); \
OUT_STRING (" "); \
OUT_REAL (fifth); \
OUT_REAL (sixth); \
OUT_STRING (" " op " \n"); \
} \
while (0)
/* This should be called before the others in this file. It opens the
output file `OUTPUT_NAME.ps', and writes some preliminary boilerplate. */
static int output_epd_header(FILE* epd_file, at_string name,
int llx, int lly, int urx, int ury)
{
at_string time;
OUT_LINE ("%EPD-1.0");
OUT1 ("%% Created by %s\n", at_version(true));
OUT1 ("%% Title: %s\n", name);
OUT1 ("%% CreationDate: %s\n", time = now ());
OUT4 ("%%BBox(%d,%d,%d,%d)\n", llx, lly, urx, ury);
free (time);
return 0;
}
/* This outputs the PostScript code which produces the shape in
SHAPE. */
static void
out_splines (FILE * epd_file, spline_list_array_type shape)
{
unsigned this_list;
spline_list_type list;
color_type last_color = {0,0,0};
for (this_list = 0; this_list < SPLINE_LIST_ARRAY_LENGTH (shape);
this_list++)
{
unsigned this_spline;
spline_type first;
list = SPLINE_LIST_ARRAY_ELT (shape, this_list);
first = SPLINE_LIST_ELT (list, 0);
if (this_list == 0 || !COLOR_EQUAL(list.color, last_color))
{
if (this_list > 0)
{
OUT_LINE ((shape.centerline || list.open) ? "S" : "f");
OUT_LINE("h");
}
OUT4 ("%.3f %.3f %.3f %s\n", (double) list.color.r / 255.0,
(double) list.color.g / 255.0, (double) list.color.b / 255.0,
(shape.centerline || list.open) ? "RG" : "rg");
last_color = list.color;
}
OUT_COMMAND2 (START_POINT (first).x, START_POINT (first).y, "m");
for (this_spline = 0; this_spline < SPLINE_LIST_LENGTH (list);
this_spline++)
{
spline_type s = SPLINE_LIST_ELT (list, this_spline);
if (SPLINE_DEGREE (s) == LINEARTYPE)
OUT_COMMAND2 (END_POINT (s).x, END_POINT (s).y, "l");
else
OUT_COMMAND6 (CONTROL1 (s).x, CONTROL1 (s).y,
CONTROL2 (s).x, CONTROL2 (s).y,
END_POINT (s).x, END_POINT (s).y,
"c");
}
}
if (SPLINE_LIST_ARRAY_LENGTH(shape) > 0)
OUT_LINE ((shape.centerline || list.open) ? "S" : "f");
}
int output_epd_writer(FILE* epd_file, at_string name,
int llx, int lly, int urx, int ury,
at_output_opts_type * opts,
spline_list_array_type shape,
at_msg_func msg_func,
at_address msg_data)
{
int result;
result = output_epd_header(epd_file, name, llx, lly, urx, ury);
if (result != 0)
return result;
out_splines(epd_file, shape);
return 0;
}
static at_string
now (void)
{
at_string time_string;
time_t t = time (0);
XMALLOC (time_string, 26); /* not 25 ! */
strcpy (time_string, ctime (&t));
time_string[24] = 0; /* No newline. */
return time_string;
}