3 Various utility functions for dealing with gfxdevices.
5 Part of the swftools package.
7 Copyright (c) 2005 Matthias Kramm <kramm@quiss.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
32 typedef struct _linedraw_internal
36 } linedraw_internal_t;
38 static void linedraw_moveTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
40 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
41 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
43 if((int)((d->x * 5120) == (int)(x * 5120)) &&
44 (int)((d->y * 5120) == (int)(y * 5120))) {
45 /* never mind- we're already there */
59 static void linedraw_lineTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
61 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
62 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
65 /* starts with a line, not with a moveto. That needs we first
66 need an explicit moveto to (0,0) */
67 linedraw_moveTo(d, 0, 0);
81 static void linedraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxcoord_t x, gfxcoord_t y)
83 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
84 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
87 /* starts with a line, not with a moveto. That needs we first
88 need an explicit moveto to (0,0) */
89 linedraw_moveTo(d, 0, 0);
92 l->type = gfx_splineTo;
104 static void* linedraw_result(gfxdrawer_t*d)
106 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
107 void*result = (void*)i->start;
109 memset(d, 0, sizeof(gfxdrawer_t));
113 void gfxdrawer_target_gfxline(gfxdrawer_t*d)
115 linedraw_internal_t*i = (linedraw_internal_t*)rfx_calloc(sizeof(linedraw_internal_t));
119 d->moveTo = linedraw_moveTo;
120 d->lineTo = linedraw_lineTo;
121 d->splineTo = linedraw_splineTo;
122 d->result = linedraw_result;
125 typedef struct _qspline_abc
131 typedef struct qspline_t
138 typedef struct cspline_t
146 static void mkspline(qspline_abc_t*s, double x, double y, gfxline_t*l)
149 Form 1: x = t*t*l->x + 2*t*(1-t)*l->sx + (1-t)*(1-t)*x;
150 Form 2: x = a*t*t + b*t + c
152 s->cx = x; s->bx = 2*l->sx - 2*x; s->ax = l->x - 2*l->sx + x;
153 s->cy = y; s->by = 2*l->sy - 2*y; s->ay = l->y - 2*l->sy + y;
156 static void spline_get_controlpoint(qspline_abc_t*q, double t1, double t2, double*dx, double*dy)
159 double nax = q->ax*dt*dt;
160 double nay = q->ay*dt*dt;
161 double nbx = 2*q->ax*dt*t1 + q->bx*dt;
162 double nby = 2*q->ay*dt*t1 + q->by*dt;
163 double ncx = q->ax*t1*t1 + q->bx*t1 + q->cx;
164 double ncy = q->ay*t1*t1 + q->by*t1 + q->cy;
169 static double get_spline_len(qspline_abc_t*s)
171 int parts = (int)(sqrt(fabs(s->ax) + fabs(s->ay))*3);
176 if(parts < 3) parts = 3;
178 r2 = 1.0/(parts*parts);
181 double dx = s->ax*(2*i+1)*r2 + s->bx*r;
182 double dy = s->ay*(2*i+1)*r2 + s->by*r;
183 len += sqrt(dx*dx+dy*dy);
185 /*printf("Spline from %f,%f to %f,%f has len %f (%f)\n", s->cx, s->cy,
186 s->cx + s->bx + s->ax,
187 s->cy + s->by + s->ay, len,
188 sqrt((s->bx + s->ax)*(s->bx + s->ax) + (s->by + s->ay)*(s->by + s->ay))
190 assert(len+0.5 >= sqrt((s->bx + s->ax)*(s->bx + s->ax) + (s->by + s->ay)*(s->by + s->ay)));
195 void gfxtool_draw_dashed_line(gfxdrawer_t*d, gfxline_t*line, float*r, float phase)
198 double linepos,nextpos;
202 if(line && line->type != gfx_moveTo) {
203 fprintf(stderr, "gfxtool: outline doesn't start with a moveTo");
209 for(i=0;r[i]>=0;i++) {
212 if(!r || (r[0]<=0 && r[0]>-0.01) || dashlen<0.001) {
213 // no dashing. just draw the thing
215 if(line->type == gfx_moveTo) {
216 d->moveTo(d, line->x, line->y);
217 } else if(line->type == gfx_lineTo) {
218 d->lineTo(d, line->x, line->y);
219 } else if(line->type == gfx_splineTo) {
220 d->splineTo(d, line->sx, line->sy, line->x, line->y);
226 if(r[0]<0 || phase<0) {
227 fprintf(stderr, "gfxtool: invalid (negative) dashes: %f, phase=%f", r[0], phase);
231 for(;line;line=line->next) {
232 if(line->type == gfx_moveTo) {
233 d->moveTo(d, line->x, line->y);
234 on = 1; nextpos = r[0]; apos = 0; linepos = 0;
235 x = line->x; y = line->y;
236 while(linepos < phase) {
237 //printf("[+] linepos: %f, phase: %f, on:%d, apos:%d nextpos:%f\n", linepos, phase, on, apos, nextpos);
239 if(linepos < phase) {
247 //printf("[k] linepos: %f, phase: %f, on:%d, apos:%d nextpos:%f \n", linepos, phase, on, apos, nextpos);
248 } else if(line->type == gfx_lineTo) {
249 double dx = line->x - x;
250 double dy = line->y - y;
251 double len = sqrt(dx*dx+dy*dy);
254 double lineend = linepos+len;
259 assert(nextpos>=linepos);
260 //printf("(line) on:%d apos: %d nextpos: %f, line pos: %f, line end: %f\n", on, apos, nextpos, linepos, linepos+len);
261 while(nextpos<lineend) {
262 double nx = x + vx*(nextpos-linepos);
263 double ny = y + vy*(nextpos-linepos);
264 if(on) {d->lineTo(d, nx,ny);/*printf("lineTo %f\n", nextpos);*/}
265 else {d->moveTo(d, nx,ny);/*printf("moveTo %f\n", nextpos);*/}
273 //printf("lineTo %f\n", 1.0);
274 d->lineTo(d, line->x,line->y);
276 x = line->x; y = line->y;
277 } else if(line->type == gfx_splineTo) {
279 double len, lineend,lastt;
280 mkspline(&q, x, y, line);
282 len = get_spline_len(&q);
283 //printf("%f %f -> %f %f, len: %f\n", x, y, line->x, line->y, len);
286 lineend = linepos+len;
289 printf("%f !< %f\n", nextpos, linepos);
290 assert(nextpos>=linepos);
291 //printf("(spline) on:%d apos: %d nextpos: %f, line pos: %f, line end: %f\n", on, apos, nextpos, linepos, linepos+len);
292 while(nextpos<lineend) {
293 double t = (nextpos-linepos)/len;
294 //printf("%f (%f-%f) apos=%d r[apos]=%f\n", t, nextpos, linepos, apos, r[apos]);
295 double nx = q.ax*t*t+q.bx*t+q.cx;
296 double ny = q.ay*t*t+q.by*t+q.cy;
299 spline_get_controlpoint(&q, lastt, t, &sx, &sy);
300 d->splineTo(d, sx, sy, nx,ny);
301 //printf("splineTo %f\n", nextpos);
304 //printf("moveTo %f\n", nextpos);
315 spline_get_controlpoint(&q, lastt, 1, &sx, &sy);
316 d->splineTo(d, sx, sy, line->x,line->y);
317 //printf("splineTo %f\n", 1.0);
319 x = line->x; y = line->y;
324 gfxline_t * gfxline_clone(gfxline_t*line)
329 gfxline_t*n = (gfxline_t*)rfx_calloc(sizeof(gfxline_t));
343 static char splineIsStraight(double x, double y, gfxline_t*l)
345 if(l->type == gfx_moveTo)
347 if(l->type == gfx_lineTo)
353 if(fabs(dx*sy - dy*sx) < 0.000001 && (dx*sx + dy*sy) >= 0) {
359 void gfxline_optimize(gfxline_t*line)
362 /* step 1: convert splines to lines, where possible */
365 if(l->type == gfx_splineTo && splineIsStraight(x,y,l)) {
366 l->type = gfx_lineTo;
372 /* step 2: combine adjacent lines and splines, where possible */
374 while(l && l->next) {
375 gfxline_t*next = l->next;
378 if(l->type == gfx_lineTo && next->type == gfx_lineTo) {
381 double nx = next->x-l->x;
382 double ny = next->y-l->y;
383 if(fabs(dx*ny - dy*nx) < 0.000001 && (dx*nx + dy*ny) >= 0) {
386 } else if(l->type == gfx_splineTo && next->type == gfx_splineTo) {
390 l->next = next->next;
405 gfxline_t* gfxtool_dash_line(gfxline_t*line, float*dashes, float phase)
409 gfxdrawer_target_gfxline(&d);
410 gfxtool_draw_dashed_line(&d, line, dashes, phase);
411 result= (gfxline_t*)d.result(&d);
415 void gfxline_show(gfxline_t*l, FILE*fi)
418 if(l->type == gfx_moveTo) {
419 fprintf(fi, "moveTo %.2f,%.2f\n", l->x, l->y);
421 if(l->type == gfx_lineTo) {
422 fprintf(fi, "lineTo %.2f,%.2f\n", l->x, l->y);
424 if(l->type == gfx_splineTo) {
425 fprintf(fi, "splineTo %.2f,%.2f %.2f,%.2f\n", l->sx, l->sy, l->x, l->y);
431 void gfxline_free(gfxline_t*l)
433 if(l && (l+1) == l->next) {
447 static inline gfxpoint_t cspline_getpoint(const struct cspline_t*s, double t)
453 double mtmt = mt*(1-t);
454 double mtmtmt = mtmt*(1-t);
455 p.x= s->end.x*ttt + 3*s->control2.x*tt*mt
456 + 3*s->control1.x*t*mtmt + s->start.x*mtmtmt;
457 p.y= s->end.y*ttt + 3*s->control2.y*tt*mt
458 + 3*s->control1.y*t*mtmt + s->start.y*mtmtmt;
461 static gfxpoint_t qspline_getpoint(const qspline_t*s, double t)
464 p.x= s->end.x*t*t + 2*s->control.x*t*(1-t) + s->start.x*(1-t)*(1-t);
465 p.y= s->end.y*t*t + 2*s->control.y*t*(1-t) + s->start.y*(1-t)*(1-t);
469 static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality2)
471 unsigned int gran = 0;
472 unsigned int istep = 0x80000000;
473 unsigned int istart = 0;
477 while(istart<0x80000000)
479 unsigned int iend = istart + istep;
480 double start = istart/(double)0x80000000;
481 double end = iend/(double)0x80000000;
484 char left = 0,recurse=0;
489 /* create simple approximation: a qspline_t which run's through the
490 qspline_t point at 0.5 */
491 test.start = cspline_getpoint(s, start);
492 test.control = cspline_getpoint(s, (start+end)/2);
493 test.end = cspline_getpoint(s, end);
494 /* fix the control point:
495 move it so that the new spline does runs through it */
496 test.control.x = -(test.end.x + test.start.x)/2 + 2*(test.control.x);
497 test.control.y = -(test.end.y + test.start.y)/2 + 2*(test.control.y);
499 /* depending on where we are in the spline, we either try to match
500 the left or right tangent */
504 pos = left?start:end;
506 test.control.x = s->end.x*(3*qpos) + 3*s->control2.x*(2*pos-3*qpos) +
507 3*s->control1.x*(1-4*pos+3*qpos) + s->start.x*(-3+6*pos-3*qpos);
508 test.control.y = s->end.y*(3*qpos) + 3*s->control2.y*(2*pos-3*qpos) +
509 3*s->control1.y*(1-4*pos+3*qpos) + s->start.y*(-3+6*pos-3*qpos);
511 test.control.x *= (end-start)/2;
512 test.control.y *= (end-start)/2;
513 test.control.x += test.start.x;
514 test.control.y += test.start.y;
516 test.control.x *= -(end-start)/2;
517 test.control.y *= -(end-start)/2;
518 test.control.x += test.end.x;
519 test.control.y += test.end.y;
524 /* measure the spline's accurancy, by taking a number of probes */
525 for(t=0;t<probes;t++) {
526 gfxpoint_t qr1,qr2,cr1,cr2;
527 double pos = 0.5/(probes*2)*(t*2+1);
530 qr1 = qspline_getpoint(&test, pos);
531 cr1 = cspline_getpoint(s, start+pos*(end-start));
540 qr2 = qspline_getpoint(&test, (1-pos));
541 cr2 = cspline_getpoint(s, start+(1-pos)*(end-start));
551 #else // quadratic error: *much* faster!
553 /* convert control point representation to
554 d*x^3 + c*x^2 + b*x + a */
555 dx= s->end.x - s->control2.x*3 + s->control1.x*3 - s->start.x;
556 dy= s->end.y - s->control2.y*3 + s->control1.y*3 - s->start.y;
558 /* we need to do this for the subspline between [start,end], not [0,1]
559 as a transformation of t->a*t+b does nothing to highest coefficient
560 of the spline except multiply it with a^3, we just need to modify
562 {double m = end-start;
567 /* use the integral over (f(x)-g(x))^2 between 0 and 1
568 to measure the approximation quality.
569 (it boils down to const*d^2) */
570 recurse = (dx*dx + dy*dy > quality2);
573 if(recurse && istep>1 && size-level > num) {
580 while(!(istart & istep)) {
589 void gfxdraw_conicTo(gfxdrawer_t*draw, double cx, double cy, double tox, double toy, double quality)
591 double c1x = (draw->x + 2 * cx) / 3;
592 double c1y = (draw->y + 2 * cy) / 3;
593 double c2x = (2 * cx + tox) / 3;
594 double c2y = (2 * cy + toy) / 3;
595 gfxdraw_cubicTo(draw, c1x, c1y, c2x, c2y, tox, toy, quality);
599 void gfxdraw_cubicTo(gfxdrawer_t*draw, double c1x, double c1y, double c2x, double c2y, double x, double y, double quality)
603 double maxerror = quality>0 ? quality : 1.0;
615 num = approximate3(&c, q, 128, maxerror);
620 mid.x = q[t].control.x;
621 mid.y = q[t].control.y;
624 draw->splineTo(draw, mid.x, mid.y, to.x, to.y);
628 gfxbbox_t gfxbbox_expand_to_point(gfxbbox_t box, gfxcoord_t x, gfxcoord_t y)
630 if(box.xmin==0 && box.ymin==0 && box.xmax==0 && box.ymax==0) {
635 if(x==0 && y==0) box.xmax = 0.0000001;
649 void gfxbbox_intersect(gfxbbox_t*box1, gfxbbox_t*box2)
651 if(box2->xmin > box1->xmin)
652 box1->xmin = box2->xmin;
653 if(box2->ymin > box1->ymin)
654 box1->ymin = box2->ymin;
655 if(box2->xmax < box1->xmax)
656 box1->xmax = box2->xmax;
657 if(box2->ymax > box1->ymax)
658 box1->ymax = box2->ymax;
659 if(box1->xmin > box1->xmax)
660 box1->xmax = box1->xmin;
661 if(box1->ymin > box1->ymax)
662 box1->ymax = box1->ymin;
665 gfxbbox_t gfxline_getbbox(gfxline_t*line)
668 gfxbbox_t bbox = {0,0,0,0};
671 if(line->type == gfx_moveTo) {
673 } else if(line->type == gfx_lineTo) {
674 if(last) bbox = gfxbbox_expand_to_point(bbox, x, y);
675 bbox = gfxbbox_expand_to_point(bbox, line->x, line->y);
677 } else if(line->type == gfx_splineTo) {
678 if(last) bbox = gfxbbox_expand_to_point(bbox, x, y);
679 bbox = gfxbbox_expand_to_point(bbox, line->sx, line->sy);
680 bbox = gfxbbox_expand_to_point(bbox, line->x, line->y);
690 gfxline_t* gfxline_append(gfxline_t*line1, gfxline_t*line2)
692 gfxline_t*l = line1;;
702 void gfxline_transform(gfxline_t*line, gfxmatrix_t*matrix)
705 double x = matrix->m00*line->x + matrix->m10*line->y + matrix->tx;
706 double y = matrix->m01*line->x + matrix->m11*line->y + matrix->ty;
709 if(line->type == gfx_splineTo) {
710 double sx = matrix->m00*line->sx + matrix->m10*line->sy + matrix->tx;
711 double sy = matrix->m01*line->sx + matrix->m11*line->sy + matrix->ty;
719 void gfxmatrix_dump(gfxmatrix_t*m, FILE*fi, char*prefix)
721 fprintf(fi, "%f %f | %f\n", m->m00, m->m10, m->tx);
722 fprintf(fi, "%f %f | %f\n", m->m01, m->m11, m->ty);
725 void gfxmatrix_transform(gfxmatrix_t*m, double* v, double*dest)
727 dest[0] = m->m00*v[0] + m->m10*v[1] + m->tx;
728 dest[1] = m->m01*v[0] + m->m11*v[1] + m->ty;
730 void gfxmatrix_invert(gfxmatrix_t*m, gfxmatrix_t*dest)
732 double det = m->m00 * m->m11 - m->m10 * m->m01;
734 memset(dest, 0, sizeof(gfxmatrix_t));
738 dest->m00 = m->m11 * det;
739 dest->m01 = -m->m01 * det;
740 dest->m10 = -m->m10 * det;
741 dest->m11 = m->m00 * det;
742 dest->tx = -(dest->m00 * m->tx + dest->m10 * m->ty);
743 dest->ty = -(dest->m01 * m->tx + dest->m11 * m->ty);
745 void gfxmatrix_unit(gfxmatrix_t*m)
747 memset(m, 0, sizeof(gfxmatrix_t));
751 void gfxmatrix_multiply(gfxmatrix_t*m1, gfxmatrix_t*m2, gfxmatrix_t*dest)
753 dest->m00 = m1->m00*m2->m00 + m1->m10*m2->m01;
754 dest->m01 = m1->m01*m2->m00 + m1->m11*m2->m01;
755 dest->m10 = m1->m00*m2->m10 + m1->m10*m2->m11;
756 dest->m11 = m1->m01*m2->m10 + m1->m11*m2->m11;
757 dest->tx = m1->m00*m2->tx + m1->m10*m2->ty + m1->tx;
758 dest->ty = m1->m01*m2->tx + m1->m11*m2->ty + m1->ty;
761 gfxfontlist_t* gfxfontlist_create()
763 /* Initial list ist empty */
767 gfxfont_t*gfxfontlist_findfont(gfxfontlist_t*list, char*id)
769 gfxfontlist_t*l = list;
771 if(!strcmp((char*)l->font->id, id)) {
778 char gfxfontlist_hasfont(gfxfontlist_t*list, gfxfont_t*font)
780 gfxfontlist_t*l = list;
782 if(!strcmp((char*)l->font->id, font->id)) {
789 gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
791 gfxfontlist_t*last=0,*l = list;
794 if(l->font == font) {
795 return list; // we already know this font
800 fprintf(stderr, "Tried to add zero font\n");
802 l = (gfxfontlist_t*)rfx_calloc(sizeof(gfxfontlist_t));
812 void gfxfontlist_free(gfxfontlist_t*list, char deletefonts)
814 gfxfontlist_t*l = list;
816 gfxfontlist_t*next = l->next;
817 if(deletefonts && l->font) {
818 gfxfont_free(l->font);l->font=0;
826 gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2)
828 gfxline_t* line = (gfxline_t*)rfx_calloc(sizeof(gfxline_t)*5);
829 line[0].x = x1;line[0].y = y1;line[0].type = gfx_moveTo;line[0].next = &line[1];
830 line[1].x = x2;line[1].y = y1;line[1].type = gfx_lineTo;line[1].next = &line[2];
831 line[2].x = x2;line[2].y = y2;line[2].type = gfx_lineTo;line[2].next = &line[3];
832 line[3].x = x1;line[3].y = y2;line[3].type = gfx_lineTo;line[3].next = &line[4];
833 line[4].x = x1;line[4].y = y1;line[4].type = gfx_lineTo;
837 gfxbbox_t* gfxline_isrectangle(gfxline_t*_l)
842 gfxline_t*l = gfxline_clone(_l);
857 if(xc==2 && x!=x1 && x!=x2) {fail=1;break;}
858 else if(xc>=1 && x==x1) {left=0;}
859 else if(xc==2 && x==x2) {left=1;}
860 else if(xc==1 && x!=x1) {x2 = x; xc=2; left=1;}
861 else if(xc==0) {x1 = x; xc=1;left=0;}
862 else {fprintf(stderr, "Internal error in rectangle detection\n");}
864 if(yc==2 && y!=y1 && y!=y2) {fail=1;break;}
865 else if(yc>=1 && y==y1) {top=0;}
866 else if(yc==2 && y==y2) {top=1;}
867 else if(yc==1 && y!=y1) {y2 = y; yc=2; top=1;}
868 else if(yc==0) {y1 = y; yc=1;top=0;}
869 else {fprintf(stderr, "Internal error in rectangle detection\n");}
871 char pos=top<<1|left;
874 /* diagonal lines not allowed */
879 /* no corner except the first one may be touched twice */
880 if(pos && (corners & 1<<pos)) {
883 /* mark which corners have been touched so far */
891 if(corners!=0x0f) return 0; // not all 4 corners reached
893 if(x2<x1) {double x = x2;x2=x1;x1=x;}
894 if(y2<y1) {double y = y2;y2=y1;y1=y;}
896 gfxbbox_t*r = malloc(sizeof(gfxbbox_t));
897 r->xmin = x1; r->ymin = y1;
898 r->xmax = x2; r->ymax = y2;
902 void gfximage_transform(gfximage_t*img, gfxcxform_t*cxform)
905 int size = img->width*img->height;
911 rr = (int)(cxform->rr*256);gr = (int)(cxform->gr*256);
912 rg = (int)(cxform->rg*256);gg = (int)(cxform->gg*256);
913 rb = (int)(cxform->rb*256);gb = (int)(cxform->gb*256);
914 ra = (int)(cxform->ra*256);ga = (int)(cxform->ga*256);
915 br = (int)(cxform->br*256);ar = (int)(cxform->ar*256);tr = (int)(cxform->tr*256);
916 bg = (int)(cxform->bg*256);ag = (int)(cxform->ag*256);tg = (int)(cxform->tg*256);
917 bb = (int)(cxform->bb*256);ab = (int)(cxform->ab*256);tb = (int)(cxform->tb*256);
918 ba = (int)(cxform->ba*256);aa = (int)(cxform->aa*256);ta = (int)(cxform->ta*256);
920 for(t=0;t<size;t++) {
921 gfxcolor_t*pixel = &img->data[t];
922 unsigned char r = (pixel->r * rr + pixel->g * rg + pixel->b * rb + pixel->a * ra + tr) / 256;
923 unsigned char g = (pixel->r * gr + pixel->g * gg + pixel->b * gb + pixel->a * ga + tg) / 256;
924 unsigned char b = (pixel->r * br + pixel->g * bg + pixel->b * bb + pixel->a * ba + tb) / 256;
925 unsigned char a = (pixel->r * ar + pixel->g * ag + pixel->b * ab + pixel->a * aa + ta) / 256;
932 void gfxline_dump(gfxline_t*line, FILE*fi, char*prefix)
935 if(line->type == gfx_moveTo) {
936 fprintf(fi, "%smoveTo %.2f %.2f\n", prefix, line->x, line->y);
937 } else if(line->type == gfx_lineTo) {
938 fprintf(fi, "%slineTo %.2f %.2f\n", prefix, line->x, line->y);
939 } else if(line->type == gfx_splineTo) {
940 fprintf(fi, "%ssplineTo (%.2f %.2f) %.2f %.2f\n", prefix, line->sx, line->sy, line->x, line->y);