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/* output-svg.h - output in SVG format
Copyright (C) 1999, 2000, 2001 Bernhard Herzog
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. */
#include "spline.h"
#include "output-svg.h"
static void
outSplineList(FILE * const fileP,
spline_list_type const splineList,
unsigned int const height) {
unsigned splineSeq;
for (splineSeq = 0;
splineSeq < SPLINE_LIST_LENGTH(splineList);
++splineSeq) {
spline_type const spline = SPLINE_LIST_ELT(splineList, splineSeq);
if (SPLINE_DEGREE(spline) == LINEARTYPE) {
fprintf(fileP, "L%g %g",
END_POINT(spline).x, height - END_POINT(spline).y);
} else
fprintf(fileP, "C%g %g %g %g %g %g",
CONTROL1(spline).x, height - CONTROL1(spline).y,
CONTROL2(spline).x, height - CONTROL2(spline).y,
END_POINT(spline).x, height - END_POINT(spline).y);
}
}
static void
out_splines(FILE * const fileP,
spline_list_array_type const shape,
unsigned int const height) {
unsigned listSeq;
pixel lastColor;
PPM_ASSIGN(lastColor, 0, 0, 0);
for (listSeq = 0;
listSeq < SPLINE_LIST_ARRAY_LENGTH(shape);
++listSeq) {
spline_list_type const splineList =
SPLINE_LIST_ARRAY_ELT(shape, listSeq);
spline_type const first = SPLINE_LIST_ELT(splineList, 0);
if (listSeq == 0 || !PPM_EQUAL(splineList.color, lastColor)) {
if (listSeq > 0) {
/* Close previous <path> element */
if (!(shape.centerline || splineList.open))
fputs("z", fileP);
fputs("\"/>\n", fileP);
}
/* Open new <path> element */
fprintf(fileP, "<path style=\"%s:#%02x%02x%02x; %s:none;\" d=\"",
(shape.centerline || splineList.open) ? "stroke" : "fill",
PPM_GETR(splineList.color),
PPM_GETG(splineList.color),
PPM_GETB(splineList.color),
(shape.centerline || splineList.open) ? "fill" : "stroke");
}
fprintf(fileP, "M%g %g",
START_POINT(first).x, height - START_POINT(first).y);
outSplineList(fileP, splineList, height);
lastColor = splineList.color;
}
if (SPLINE_LIST_ARRAY_LENGTH(shape) > 0) {
spline_list_type const lastSplineList =
SPLINE_LIST_ARRAY_ELT(shape, SPLINE_LIST_ARRAY_LENGTH(shape)-1);
if (!(shape.centerline || lastSplineList.open))
fputs("z", fileP);
/* Close last <path> element */
fputs("\"/>\n", fileP);
}
}
int
output_svg_writer(FILE * const fileP,
const char * const name,
int const llx,
int const lly,
int const urx,
int const ury,
at_output_opts_type * const opts,
at_spline_list_array_type const shape,
at_msg_func msg_func,
void * const msg_data) {
int const width = urx - llx;
int const height = ury - lly;
fputs("<?xml version=\"1.0\" standalone=\"yes\"?>\n", fileP);
fprintf(fileP, "<svg width=\"%d\" height=\"%d\">\n", width, height);
out_splines(fileP, shape, height);
fputs("</svg>\n", fileP);
return 0;
}
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