1 files changed, 116 insertions, 0 deletions
diff --git a/third_party/spiro/ppedit/bezctx_ps.c b/third_party/spiro/ppedit/bezctx_ps.c
new file mode 100644
index 0000000..05a38ae
--- /dev/null
+++ b/third_party/spiro/ppedit/bezctx_ps.c
@@ -0,0 +1,116 @@
+/*
+ppedit - A pattern plate editor for Spiro splines.
+Copyright (C) 2007 Raph Levien
+
+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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
+
+*/
+#include <stdio.h>
+
+#include "zmisc.h"
+#include "bezctx.h"
+#include "bezctx_ps.h"
+
+typedef struct {
+    bezctx base;
+    int is_open;
+    double x, y;
+    FILE *f;
+} bezctx_ps;
+
+const char *ps_prolog = "%!PS\n"
+"/m { moveto } bind def\n"
+"/l { lineto } bind def\n"
+"/c { curveto } bind def\n"
+"/z { closepath } bind def\n"
+"1 -1 scale\n"
+"0 -792 translate\n";
+
+const char *ps_postlog = "stroke\n"
+"showpage\n";
+
+static void
+bezctx_ps_moveto(bezctx *z, double x, double y, int is_open) {
+    bezctx_ps *bc = (bezctx_ps *)z;
+
+    if (!bc->is_open) fprintf(bc->f, "z\n");
+    fprintf(bc->f, "%g %g m\n", x, y);
+    bc->is_open = is_open;
+    bc->x = x;
+    bc->y = y;
+}
+
+void
+bezctx_ps_lineto(bezctx *z, double x, double y) {
+    bezctx_ps *bc = (bezctx_ps *)z;
+
+    fprintf(bc->f, "%g %g l\n", x, y);
+    bc->x = x;
+    bc->y = y;
+}
+
+void
+bezctx_ps_quadto(bezctx *z, double xm, double ym, double x3, double y3)
+{
+    bezctx_ps *bc = (bezctx_ps *)z;
+    double x0, y0;
+    double x1, y1;
+    double x2, y2;
+
+    x0 = bc->x;
+    y0 = bc->y;
+    x1 = xm + (1./3) * (x0 - xm);
+    y1 = ym + (1./3) * (y0 - ym);
+    x2 = xm + (1./3) * (x3 - xm);
+    y2 = ym + (1./3) * (y3 - ym);
+    fprintf(bc->f, "%g %g %g %g %g %g c\n", x1, y1, x2, y2, x3, y3);
+    bc->x = x3;
+    bc->y = y3;
+}
+
+void
+bezctx_ps_curveto(bezctx *z, double x1, double y1, double x2, double y2,
+		  double x3, double y3)
+{
+    bezctx_ps *bc = (bezctx_ps *)z;
+
+    fprintf(bc->f, "%g %g %g %g %g %g c\n", x1, y1, x2, y2, x3, y3);
+    bc->x = x3;
+    bc->y = y3;
+}
+
+bezctx *
+new_bezctx_ps(FILE *f) {
+    bezctx_ps *result = znew(bezctx_ps, 1);
+
+    result->base.moveto = bezctx_ps_moveto;
+    result->base.lineto = bezctx_ps_lineto;
+    result->base.quadto = bezctx_ps_quadto;
+    result->base.curveto = bezctx_ps_curveto;
+    result->base.mark_knot = NULL;
+    result->is_open = 1;
+    result->f = f;
+    return &result->base;
+}
+
+void
+bezctx_ps_close(bezctx *z)
+{
+    bezctx_ps *bc = (bezctx_ps *)z;
+
+    if (!bc->is_open) fprintf(bc->f, "z\n");
+    zfree(bc);
+}