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  1. /*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
  2.  *
  3.  *  This program is free software; you can redistribute it and/or modify
  4.  *  it under the terms of the GNU General Public License as published by
  5.  *  the Free Software Foundation; either version 2 of the License, or
  6.  *  (at your option) any later version.
  7.  *
  8.  *  This program is distributed in the hope that it will be useful,
  9.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11.  *  GNU General Public License for more details.
  12.  *
  13.  *  You should have received a copy of the GNU General Public License
  14.  *  along with this program; if not, write to the Free Software
  15.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16.  */
  17.  
  18. #include <errno.h>
  19. #include "flydraw.h"
  20.  
  21. /* Tikz things */
  22.  
  23. static char *tikz_color (int the_color)
  24. {
  25.   static char buf[50];
  26.   int r=gdImageRed(image,the_color);
  27.   int g=gdImageGreen(image,the_color);
  28.   int b=gdImageBlue(image,the_color);
  29.   sprintf(buf, "{rgb,255:red,%i;green,%i;blue,%i}",r,g,b);
  30.   return buf;
  31. }
  32.  
  33. static char *tikz_options (int the_color, int the_fill)
  34. {
  35.   static char buf[100];
  36.   if (the_color == gdBrushed)
  37.     the_color = tikz_brushColor;
  38.   sprintf (buf, "draw=%s,cap=round",tikz_color(the_color));
  39.   if (the_color != tikz_brushColor) strcat(buf, ",thin");
  40.   if (the_fill == -1) strcat(buf, ",dashed");
  41.   if (the_fill == 1)
  42.     sprintf(buf+strlen(buf), ",fill=%s", tikz_color(the_color));
  43.   return buf;
  44. }
  45.  
  46. #define flip(y) (sizey-1-(y))
  47.  
  48. /* bug in gdImageFillToBorder */
  49.  
  50. void patchgdImageFillToBorder (gdImagePtr im, int x, int y, int border, int color)
  51. {
  52.   if(x>=im->sx || x<0 || y>=im->sy || y<0) return;
  53.   gdImageFillToBorder(im,x,y,border,color);
  54. }
  55.  
  56. void patchgdImageFill (gdImagePtr im, int x, int y, int color)
  57. {
  58.   if(x>=im->sx || x<0 || y>=im->sy || y<0) return;
  59.   gdImageFill(im,x,y,color);
  60. }
  61.  
  62. #define DASHPIXELS 8
  63.  
  64. void myDashedLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color){
  65.   /**
  66.    * emulates gdImageDashedLine with gdImageSetStyle and gdImageLine
  67.    * GK: As gdImageDashedLine is slightly broken in latest libgd libraries,
  68.    * GK: I implemented an emulation named "myDashedLine"
  69.    **/
  70.  
  71.   int styleDashed[DASHPIXELS],i;
  72.   for (i=0; i< DASHPIXELS/2; i++) styleDashed[i]=color;
  73.   for (; i< DASHPIXELS; i++) styleDashed[i]=gdTransparent;
  74.   gdImageSetStyle(im, styleDashed, DASHPIXELS);
  75.   gdImageLine(im, x1, y1, x2, y2, gdStyled);
  76. }
  77.  
  78.  
  79. /* File opening: with security */
  80. FILE *open4read(char *n)
  81. {
  82.   char *p, *p1, *p2, namebuf[2048];
  83.   int t;
  84.   FILE *f;
  85.   n=find_word_start(n);
  86.   if(*n==0) return NULL;
  87.   p=getenv("flydraw_filebase");
  88.   p1=n+strlen(n)-4;if(p1<n || strcasecmp(p1,".gif")!=0) t=1; else t=0;
  89.   if(p!=NULL && *p!=0) {
  90.     char pbuf[MAX_LINELEN+1];
  91.     snprintf(pbuf,sizeof(pbuf),"%s",p);
  92.     p=find_word_start(pbuf); if(strstr(p,"..")!=NULL) return NULL;
  93.     if(*n=='/' || strstr(n,"..")!=NULL) return NULL;
  94.     /* prohibit unusual file/dir names */
  95.     for(p1=p;*p1;p1++)
  96.       if(!isalnum(*p1) && !isspace(*p1) && strchr("~_-/.",*p1)==NULL)
  97.         return NULL;
  98.     for(p1=n;*p1;p1++)
  99.       if(!isalnum(*p1) && !isspace(*p1) && strchr("~_-/.",*p1)==NULL)
  100.         return NULL;
  101.     f=NULL;
  102.     for(p1=p; *p1; p1=find_word_start(p2)) {
  103.       p2=find_word_end(p1);
  104.       if(*p2) *p2++=0;
  105.       snprintf(namebuf,sizeof(namebuf),"%s/%s",p1,n);
  106.       f=fopen(namebuf,"r"); if(f!=NULL) goto imgtype;
  107.     }
  108.     p1=getenv("w_wims_session");
  109.     if(p1!=NULL && strncmp(n,"insert",6)==0) {
  110.       snprintf(namebuf,sizeof(namebuf),"../s2/%s/%s",p1,n);
  111.       f=fopen(namebuf,"r");
  112.     }
  113.   }
  114.   else {
  115.     snprintf(namebuf,sizeof(namebuf),"%s",n);
  116.     f=fopen(namebuf,"r");
  117.   }
  118.   imgtype:
  119.   if(t && f!=NULL) {
  120.     char tbuf[1024],sbuf[4096];
  121.     fclose(f); f=NULL;
  122.     p1=getenv("TMPDIR"); if(p1==NULL || *p1==0) p1=".";
  123.     snprintf(tbuf,sizeof(tbuf),"%s/drawfile_.gif",p1);
  124.     snprintf(sbuf,sizeof(sbuf),"convert %s %s",namebuf,tbuf);
  125.     if (system(sbuf)) fly_error("system_failed");
  126.       f=fopen(tbuf,"r");
  127.   }
  128.   return f;
  129. }
  130.  
  131. /* Does nothing; just a comment. */
  132. void obj_comment(objparm *pm)
  133. {
  134.   return;
  135. }
  136.  
  137. /* define image size */
  138. void obj_size(objparm *pm)
  139. {
  140.   sizex=rint(pm->pd[0]); sizey=rint(pm->pd[1]);
  141.   if(sizex<0 || sizey<0 || sizex>MAX_SIZE || sizey>MAX_SIZE) {
  142.     fly_error("bad_size"); return;
  143.   }
  144.   if(image!=NULL) {
  145.     fly_error("size_already_defined"); return;
  146.   }
  147.   image=gdImageCreate(sizex,sizey);
  148.   if(tikz_file) fprintf(tikz_file,"\\clip (0,0) rectangle (%i, %i);\n", sizex, sizey);
  149.   if(image==NULL) fly_error("image_creation_failure");
  150.   else {
  151.     color_white=gdImageColorAllocate(image,255,255,255);
  152.     color_black=gdImageColorAllocate(image,0,0,0);
  153.     color_bounder=gdImageColorAllocate(image,1,2,3);
  154.     color_frame=gdImageColorAllocate(image,254,254,254);
  155.   }
  156. }
  157.  
  158. /* new image */
  159. void obj_new(objparm *pm)
  160. {
  161.   if(image) {
  162.     gdImageDestroy(image);image=NULL;
  163.   }
  164.   if(pm->pcnt>=2) { obj_size(pm); gdImageRectangle(image,0,0,sizex-1,sizey-1,color_frame);}
  165.   else sizex=sizey=0;
  166.   saved=0;
  167. }
  168.  
  169. /* new image */
  170. void obj_existing(objparm *pm)
  171. {
  172.   FILE *inf;
  173.   char *pp;
  174.  
  175.   if(image) {
  176.     gdImageDestroy(image);image=NULL;
  177.   }
  178.   pp=find_word_start(pm->str);*find_word_end(pp)=0;
  179.   inf=open4read(pp);
  180.   if(inf==NULL) {
  181.     fly_error("file_not_exist"); return;
  182.   }
  183.   image=gdImageCreateFromGif(inf); fclose(inf);
  184.   if(image==NULL) {
  185.     fly_error("bad_gif"); return;
  186.   }
  187.   sizex=image->sx; sizey=image->sy;
  188.   saved=0;
  189. }
  190. /* tikzfile */
  191. void obj_tikzfile(objparm *pm)
  192. {
  193.   char *p;
  194.   if(tikz_file){
  195.     fprintf(tikz_file,"\\end{tikzpicture}\n");
  196.     fclose(tikz_file);
  197.   }
  198.   p=find_word_start(pm->str); *find_word_end(p)=0;
  199.   snprintf(tikzfilename,sizeof(tikzfilename),"%s",p);
  200.   tikz_file=fopen(tikzfilename,"w");
  201.   if(!tikz_file)
  202.     fly_error("tikz_nopen");
  203.   fprintf(tikz_file,"\\begin{tikzpicture}\[x=0.02cm, y=0.02cm]\n");
  204. }
  205.  
  206. /* solid line */
  207. void obj_line(objparm *pm)
  208. {
  209.   scale(pm->pd,pm->p,2);
  210.   gdImageLine(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3],pm->color[0]);
  211.   if (tikz_file)
  212.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  213.       tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),pm->p[2],flip(pm->p[3]));
  214.   if(vimg_enable) vimg_line(scale_buf[0],scale_buf[1],scale_buf[2],scale_buf[3]);
  215. }
  216.  
  217. void _obj_arrow(objparm *pm, int twoside)
  218. {
  219.   int l,xx,yy;
  220.   gdPoint ii[3];
  221.   double dx,dy,length,dd[6];
  222.   scale(pm->pd,pm->p,2);
  223.   xx=ii[0].x=pm->p[2];yy=ii[0].y=pm->p[3];
  224.   l=pm->pd[4];if(l<0) l=0; if(l>200) l=200;
  225.   scale2(pm->pd[0]-pm->pd[2],pm->pd[1]-pm->pd[3],&dx,&dy);
  226.   length=sqrt(dx*dx+dy*dy);
  227.   if(length<3 || l<5) goto stem;
  228.   dd[0]=l*dx/length; dd[1]=l*dy/length;
  229.   #define fat 0.27
  230.   dd[2]=dd[0]+dd[1]*fat; dd[3]=dd[1]-dd[0]*fat;
  231.   dd[4]=dd[0]-dd[1]*fat; dd[5]=dd[1]+dd[0]*fat;
  232.   ii[1].x=rint(dd[2])+ii[0].x; ii[1].y=rint(dd[3])+ii[0].y;
  233.   ii[2].x=rint(dd[4])+ii[0].x; ii[2].y=rint(dd[5])+ii[0].y;
  234.   gdImageFilledPolygon(image, ii,3,pm->color[0]);
  235.   if(tikz_file)
  236.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) -- (%i, %i) -- cycle;\n",
  237.       tikz_options(pm->color[0],1),ii[0].x,flip(ii[0].y),ii[1].x,flip(ii[1].y),ii[2].x,flip(ii[2].y));
  238.   if(vimg_enable) vimg_polyline(scale_buf,3,1);
  239.   xx=rint(dd[0])+ii[0].x;yy=rint(dd[1])+ii[0].y;
  240.   if(twoside) {
  241.     ii[0].x=pm->p[0]; ii[0].y=pm->p[1];
  242.     ii[1].x=-rint(dd[2])+ii[0].x; ii[1].y=-rint(dd[3])+ii[0].y;
  243.     ii[2].x=-rint(dd[4])+ii[0].x; ii[2].y=-rint(dd[5])+ii[0].y;
  244.     gdImageFilledPolygon(image, ii,3,pm->color[0]);
  245.   if(tikz_file)
  246.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) -- (%i, %i) -- cycle;\n",
  247.       tikz_options(pm->color[0],1),ii[0].x,flip(ii[0].y),ii[1].x,flip(ii[1].y),ii[2].x,flip(ii[2].y));
  248.   }
  249.   stem: if(pm->fill)
  250.     myDashedLine(image,pm->p[0],pm->p[1],xx,yy,pm->color[0]);
  251.   else
  252.     gdImageLine(image,pm->p[0],pm->p[1],xx,yy,pm->color[0]);
  253.   if(tikz_file)
  254.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  255.       tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),xx,flip(yy));
  256.   if(vimg_enable) vimg_line(scale_buf[0],scale_buf[1],scale_buf[2],scale_buf[3]);
  257. }
  258.  
  259. /* Arrow */
  260. void obj_arrow(objparm *pm)
  261. {
  262.   _obj_arrow(pm,0);
  263. }
  264.  
  265. /* 2-sided arrow */
  266. void obj_arrow2(objparm *pm)
  267. {
  268.    _obj_arrow(pm,1);
  269. }
  270.  
  271. void _obj_arrows(objparm *pm, int twoside)
  272. {
  273.   #define fat 0.27
  274.   int i,l,xx,yy;
  275.   gdPoint ii[3];
  276.   double dx,dy,length,dd[6];
  277.   l=pm->pd[0];if(l<0) l=0; if(l>200) l=200;
  278.   scale(pm->pd+1,pm->p+1,pm->pcnt/2);
  279.   for (i=1;i<pm->pcnt;i+=4){
  280.       xx=ii[0].x=pm->p[i+2];yy=ii[0].y=pm->p[i+3];
  281.       scale2(pm->pd[i]-pm->pd[i+2],pm->pd[i+1]-pm->pd[i+3],&dx,&dy);
  282.       length=sqrt(dx*dx+dy*dy);
  283.       if(length<3 || l<5) goto stem;
  284.       dd[0]=l*dx/length; dd[1]=l*dy/length;
  285.       dd[2]=dd[0]+dd[1]*fat; dd[3]=dd[1]-dd[0]*fat;
  286.       dd[4]=dd[0]-dd[1]*fat; dd[5]=dd[1]+dd[0]*fat;
  287.       ii[1].x=rint(dd[2])+ii[0].x; ii[1].y=rint(dd[3])+ii[0].y;
  288.       ii[2].x=rint(dd[4])+ii[0].x; ii[2].y=rint(dd[5])+ii[0].y;
  289.       gdImageFilledPolygon(image, ii,3,pm->color[0]);
  290.       if(tikz_file)
  291.   fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) -- (%i, %i) -- cycle;\n",
  292.         tikz_options(pm->color[0],1),ii[0].x,flip(ii[0].y),ii[1].x,flip(ii[1].y),ii[2].x,flip(ii[2].y));
  293.       xx=rint(dd[0])+ii[0].x;yy=rint(dd[1])+ii[0].y;
  294.       if(twoside) {
  295.   ii[0].x=pm->p[i]; ii[0].y=pm->p[i+1];
  296.   ii[1].x=-rint(dd[2])+ii[0].x; ii[1].y=-rint(dd[3])+ii[0].y;
  297.   ii[2].x=-rint(dd[4])+ii[0].x; ii[2].y=-rint(dd[5])+ii[0].y;
  298.   gdImageFilledPolygon(image, ii,3,pm->color[0]);
  299.   if(tikz_file)
  300.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) -- (%i, %i) -- cycle;\n",
  301.         tikz_options(pm->color[0],1),ii[0].x,flip(ii[0].y),ii[1].x,flip(ii[1].y),ii[2].x,flip(ii[2].y));
  302.       }
  303.     stem: if(pm->fill)
  304.   myDashedLine(image,pm->p[i],pm->p[i+1],xx,yy,pm->color[0]);
  305.       else
  306.   gdImageLine(image,pm->p[i],pm->p[i+1],xx,yy,pm->color[0]);
  307.       if(tikz_file)
  308.   fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  309.     tikz_options(pm->color[0],pm->fill),pm->p[i],flip(pm->p[i+1]),xx,flip(yy));
  310.     }
  311. }
  312.  
  313. /* Arrows */
  314. void obj_arrows(objparm *pm)
  315. {
  316.   _obj_arrows(pm,0);
  317. }
  318.  
  319. /* 2-sided arrows */
  320. void obj_arrows2(objparm *pm)
  321. {
  322.    _obj_arrows(pm,1);
  323. }
  324.  
  325. /* horizontal line */
  326. void obj_hline(objparm *pm)
  327. {
  328.   scale(pm->pd,pm->p,1);
  329.   if(pm->fill)
  330.     myDashedLine(image,0,pm->p[1],sizex,pm->p[1],pm->color[0]);
  331.   else
  332.     gdImageLine(image,0,pm->p[1],sizex,pm->p[1],pm->color[0]);
  333.   if (tikz_file)
  334.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  335.       tikz_options(pm->color[0],pm->fill),0,flip(pm->p[1]),sizex,flip(pm->p[1]));
  336. }
  337.  
  338.  
  339. /* halfline */
  340. void obj_halfline(objparm *pm)
  341. {
  342.   double t1,t2,t3;
  343.   scale(pm->pd,pm->p,2);
  344.   if (pm->p[2] != pm->p[0]){
  345.       t1 = (pm->p[2] > pm->p[0]) ? sizex : 0;
  346.       t1 = (t1 - pm->p[0])/(pm->p[2] - pm->p[0]);
  347.   }
  348.   else
  349.     t1 = INFINITY;
  350.   if (pm->p[3] != pm->p[1]){
  351.       t2 = (pm->p[3] > pm->p[1]) ? sizey : 0;
  352.       t2 = (t2 - pm->p[1])/(pm->p[3] - pm->p[1]);
  353.   }
  354.   else
  355.     t2 = INFINITY;
  356.   t3 = (t1 < t2) ? t1 : t2;
  357.   if(pm->fill)
  358.     myDashedLine(image,pm->p[0],pm->p[1],pm->p[0]+t3*(pm->p[2]-pm->p[0]),
  359.      pm->p[1]+t3*(pm->p[3]-pm->p[1]),pm->color[0]);
  360.   else
  361.     gdImageLine(image,pm->p[0],pm->p[1],pm->p[0]+t3*(pm->p[2]-pm->p[0]),
  362.      pm->p[1]+t3*(pm->p[3]-pm->p[1]),pm->color[0]);
  363.   if (tikz_file)
  364.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  365.       tikz_options(pm->color[0],pm->fill),
  366.       pm->p[0],flip(pm->p[1]),(int)(pm->p[0]+t3*(pm->p[2]-pm->p[0])),
  367.       flip((int)(pm->p[1]+t3*(pm->p[3]-pm->p[1]))));
  368. }
  369.  
  370. /* vertical line */
  371. void obj_vline(objparm *pm)
  372. {
  373.   scale(pm->pd,pm->p,1);
  374.   if(pm->fill)
  375.     myDashedLine(image,pm->p[0],0,pm->p[0],sizey,pm->color[0]);
  376.   else
  377.     gdImageLine(image,pm->p[0],0,pm->p[0],sizey,pm->color[0]);
  378.   if (tikz_file)
  379.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  380.       tikz_options(pm->color[0],pm->fill),pm->p[0],0,pm->p[0],sizey);
  381. }
  382.  
  383. /* dashed line */
  384. void obj_dline(objparm *pm)
  385. {
  386.   scale(pm->pd,pm->p,2);
  387.   myDashedLine(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3], pm->color[0]);
  388.   if (tikz_file)
  389.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  390.       tikz_options(pm->color[0],-1),
  391.       pm->p[0],flip(pm->p[1]),pm->p[2],flip(pm->p[3]));
  392. }
  393.  
  394. /* parallel lines.
  395.  * x1,y1,x2,y2,xv,yv,n,color */
  396. void obj_parallel(objparm *pm)
  397. {
  398.  int i, n, xi,yi;
  399.  double xv,yv;
  400.  n=pm->pd[6]; if(n<0) return; if(n>256) n=256;
  401.  scale(pm->pd,pm->p,3);
  402.  scale2(pm->pd[4],pm->pd[5],&xv,&yv);
  403.  if (tikz_file)
  404.    fprintf(tikz_file, "\\draw\[%s]", tikz_options(pm->color[0],pm->fill));
  405.  for(i=0;i<n;i++) {
  406.    xi=rint(i*xv); yi=rint(i*yv);
  407.    gdImageLine(image,pm->p[0]+xi,pm->p[1]+yi,pm->p[2]+xi,pm->p[3]+yi,
  408.              pm->color[0]);
  409.    if (tikz_file)
  410.      fprintf(tikz_file, "(%i,%i)--(%i, %i)",
  411.        pm->p[0]+xi,flip(pm->p[1]+yi),pm->p[2]+xi,flip(pm->p[3]+yi));
  412.    if(vimg_enable) vimg_line(scale_buf[0]+i*(scale_buf[4]-transx),
  413.        scale_buf[1]+i*(scale_buf[5]-transy),
  414.        scale_buf[2]+i*(scale_buf[4]-transx),
  415.        scale_buf[3]+i*(scale_buf[5]-transy));
  416.  }
  417.  if(tikz_file) fprintf(tikz_file,";\n");
  418. }
  419.  
  420. /* rectangle */
  421. void obj_rect(objparm *pm)
  422. {
  423.   int x1,y1,x2,y2;
  424.   scale(pm->pd,pm->p,2);
  425.   x1=min(pm->p[0],pm->p[2]); x2=max(pm->p[0],pm->p[2]);
  426.   y1=min(pm->p[1],pm->p[3]); y2=max(pm->p[1],pm->p[3]);
  427.   if(pm->fill)
  428.     gdImageFilledRectangle(image,x1,y1,x2,y2,pm->color[0]);
  429.   else
  430.     gdImageRectangle(image,x1,y1,x2,y2,pm->color[0]);
  431.   if(tikz_file)
  432.     fprintf(tikz_file,
  433.       "\\draw\[%s] (%i,%i) rectangle (%i,%i);\n",
  434.       tikz_options(pm->color[0],pm->fill),x1,flip(y1),x2,flip(y2));
  435.   if(vimg_enable) vimg_rect(scale_buf[0],scale_buf[1],scale_buf[2],scale_buf[3]);
  436. }
  437.  
  438. /* square */
  439. void obj_square(objparm *pm)
  440. {
  441.   int w,h;
  442.   scale(pm->pd,pm->p,1);
  443.   w=rint(pm->pd[2]); h=rint(pm->pd[2]);
  444.   if(pm->fill)
  445.     gdImageFilledRectangle(image,pm->p[0],pm->p[1],
  446.                pm->p[0]+w,pm->p[1]+h,pm->color[0]);
  447.   else
  448.     gdImageRectangle(image,pm->p[0],pm->p[1],
  449.                pm->p[0]+w,pm->p[1]+h,pm->color[0]);
  450.   if(tikz_file){
  451.     fprintf(tikz_file,
  452.       "\\draw\[%s] (%i,%i) rectangle (%i,%i);\n",
  453.       tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),
  454.       pm->p[0]+w,flip(pm->p[1]+h));
  455.   }
  456.   if(vimg_enable) vimg_rect(scale_buf[0],scale_buf[1],
  457.                       scale_buf[0]+pm->pd[2],scale_buf[1]+pm->pd[2]);
  458. }
  459.  
  460. /* triangle */
  461. void obj_triangle(objparm *pm)
  462. {
  463.   scale(pm->pd,pm->p,3);
  464.   if(pm->fill)
  465.     gdImageFilledPolygon(image,(gdPointPtr) pm->p,3,pm->color[0]);
  466.   else
  467.     gdImagePolygon(image,(gdPointPtr) pm->p,3,pm->color[0]);
  468.   if (tikz_file)
  469.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) -- (%i, %i) -- cycle;\n",
  470.       tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),pm->p[2],flip(pm->p[3]),pm->p[4],flip(pm->p[5]));
  471.   if(vimg_enable) vimg_polyline(scale_buf,3,1);
  472. }
  473.  
  474. /* polygon */
  475. void obj_poly(objparm *pm)
  476. {
  477.   int cnt,i;
  478.   cnt=(pm->pcnt)/2;
  479.   scale(pm->pd,pm->p,cnt);
  480.   if(pm->fill)
  481.     gdImageFilledPolygon(image,(gdPointPtr) pm->p,cnt,pm->color[0]);
  482.   else
  483.     gdImagePolygon(image,(gdPointPtr) pm->p,cnt,pm->color[0]);
  484.   if(tikz_file){
  485.     fprintf(tikz_file,"\\draw\[%s] (%i,%i) --",tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]));
  486.     for (i= 1; i<cnt; i++)
  487.         fprintf(tikz_file,"(%i,%i)--", pm->p[2*i],flip(pm->p[2*i+1]));
  488.     fprintf(tikz_file," cycle;\n");
  489.   }
  490.   if(vimg_enable) vimg_polyline(scale_buf,cnt,1);
  491. }
  492.  
  493. /* rays */
  494. void obj_rays(objparm *pm)
  495. {
  496.   int i, n;
  497.   n=(pm->pcnt)/2;
  498.   scale(pm->pd,pm->p,n);
  499.   if (tikz_file)
  500.     fprintf(tikz_file, "\\draw\[%s]",tikz_options(pm->color[0],pm->fill));
  501.   for(i=2;i<2*n;i+=2) {
  502.     gdImageLine(image,pm->p[0],pm->p[1],pm->p[i],pm->p[i+1],pm->color[0]);
  503.     if (tikz_file)
  504.       fprintf(tikz_file, "(%i,%i) -- (%i,%i)",
  505.         pm->p[0],flip(pm->p[1]),pm->p[i],flip(pm->p[i+1]));
  506.     if(vimg_enable) vimg_line(scale_buf[0],scale_buf[1],
  507.                         scale_buf[i],scale_buf[i+1]);
  508.   }
  509.   if (tikz_file) fprintf(tikz_file,";\n");
  510. }
  511. /* crosshair */
  512. void obj_crosshair(objparm *pm)
  513. {
  514.   scale(pm->pd,pm->p,2);
  515.   gdImageLine(image,pm->p[0]+width2,pm->p[1]+width2,pm->p[0]-width2,pm->p[1]-width2,pm->color[0]);
  516.   gdImageLine(image,pm->p[0]-width2,pm->p[1]+width2,pm->p[0]+width2,pm->p[1]-width2,pm->color[0]);
  517.   if (tikz_file){
  518.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  519.       tikz_options(pm->color[0],pm->fill),pm->p[0]+width2,flip(pm->p[1]+width2),pm->p[0]-width2,flip(pm->p[1]-width2));
  520.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i);\n",
  521.       tikz_options(pm->color[0],pm->fill),pm->p[0]-width2,flip(pm->p[1]+width2),pm->p[0]+width2,flip(pm->p[1]-width2));
  522.   }
  523. }
  524. /* crosshairs */
  525.  
  526. void obj_crosshairs(objparm *pm)
  527. {
  528.   int i, n;
  529.   n=(pm->pcnt)/2;
  530.   scale(pm->pd,pm->p,n);
  531.   if (tikz_file)
  532.       fprintf(tikz_file, "\\draw\[%s]",tikz_options(pm->color[0],pm->fill));
  533.   for(i=0;i<2*n;i+=2) {
  534.     gdImageLine(image,pm->p[i]+width2,pm->p[i+1]+width2,pm->p[i]-width2,pm->p[i+1]-width2,pm->color[0]);
  535.     gdImageLine(image,pm->p[i]-width2,pm->p[i+1]+width2,pm->p[i]+width2,pm->p[i+1]-width2,pm->color[0]);
  536.     if (tikz_file){
  537.       fprintf(tikz_file, "(%i, %i) -- (%i, %i) ",
  538.         pm->p[i]+width2,flip(pm->p[i+1]+width2),pm->p[i]-width2,flip(pm->p[i+1]-width2));
  539.       fprintf(tikz_file, "(%i, %i) -- (%i, %i)",
  540.         pm->p[i]-width2,flip(pm->p[i+1]+width2),pm->p[i]+width2,flip(pm->p[i+1]-width2));
  541.     }
  542.   }
  543.   if (tikz_file) fprintf(tikz_file,";\n");
  544. }
  545.  
  546.  
  547. /* segments */
  548. void obj_lines(objparm *pm)
  549. {
  550.  int i, n;
  551.  n=(pm->pcnt)/2;
  552.  scale(pm->pd,pm->p,n);
  553.  if (tikz_file)
  554.  {
  555.    fprintf(tikz_file,"\\draw\[%s] (%i,%i)",
  556.      tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]));
  557.    for(i=2;i<2*n;i+=2)
  558.      fprintf(tikz_file, "--(%i,%i)",pm->p[i],flip(pm->p[i+1]));
  559.    fprintf(tikz_file, ";\n");
  560.  }
  561.  for(i=2;i<2*n;i+=2){
  562.    gdImageLine(image,pm->p[i-2],pm->p[i-1],pm->p[i],pm->p[i+1],pm->color[0]);
  563.   if(vimg_enable) vimg_polyline(scale_buf,n,0);
  564.   }
  565. }
  566. /*segments from x1,y1 to x2,y2, x3,y3 to x4,y4, etc */
  567. void obj_segments(objparm *pm)
  568. {
  569.   int i, n;
  570.   n=(pm->pcnt)/4;
  571.   scale(pm->pd,pm->p,2*n);
  572.   if (tikz_file)
  573.     fprintf(tikz_file, "\\draw\[%s]",tikz_options(pm->color[0],pm->fill));
  574.   for(i=0;i<4*n;i+=4){
  575.     gdImageLine(image,pm->p[i],pm->p[i+1],pm->p[i+2],pm->p[i+3],pm->color[0]);
  576.     if (tikz_file)
  577.       fprintf(tikz_file, "(%i,%i)--(%i,%i)",
  578.        pm->p[i],flip(pm->p[i+1]),pm->p[i+2],flip(pm->p[i+3]));
  579.   }
  580.   if(tikz_file) fprintf(tikz_file, ";\n");
  581. }
  582. /* segments */
  583. void obj_dlines(objparm *pm)
  584. {
  585.  int i, n;
  586.  n=(pm->pcnt)/2;
  587.  scale(pm->pd,pm->p,n);
  588.  if (tikz_file)
  589.  {
  590.    fprintf(tikz_file,"\\draw\[%s] (%i,%i)",
  591.      tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]));
  592.    for(i=2;i<2*n;i+=2)
  593.      fprintf(tikz_file, "--(%i,%i)",pm->p[i],flip(pm->p[i+1]));
  594.    fprintf(tikz_file, ";\n");
  595.  }
  596.  for(i=2;i<2*n;i+=2)
  597.    myDashedLine(image,pm->p[i-2],pm->p[i-1],pm->p[i],pm->p[i+1],pm->color[0]);
  598.  if(vimg_enable) vimg_polyline(scale_buf,n,0);
  599. }
  600.  
  601. /* points */
  602. void obj_points(objparm *pm)
  603. {
  604.  int i, n;
  605.  n=(pm->pcnt)/2;
  606.  scale(pm->pd,pm->p,n);
  607.  for(i=0;i<2*n;i+=2) gdImageSetPixel(image,pm->p[i],pm->p[i+1],pm->color[0]);
  608.  if(tikz_file) {
  609.    fprintf(tikz_file, "\\draw\[%s]", tikz_options(pm->color[0],pm->fill));
  610.    for(i=0;i<2*n;i+=2)
  611.      fprintf(tikz_file,"(%i,%i)circle(1pt)",pm->p[i],flip(pm->p[i+1]));
  612.    fprintf(tikz_file,";\n");
  613.  }
  614. }
  615.  
  616. /* lattice.
  617.  * x0,y0,xv1,yv1,xv2,yv2,n1,n2,color */
  618. void obj_lattice(objparm *pm)
  619. {
  620.  int n1,n2,i1,i2,xi1,yi1,xi2,yi2;
  621.  double xv1,xv2,yv1,yv2;
  622.  n1=pm->pd[6];n2=pm->pd[7]; if(n1<0 || n2<0) return;
  623.  if(n1>256) n1=256;
  624.  if(n2>256) n2=256;
  625.  scale(pm->pd,pm->p,1);
  626.  scale2(pm->pd[2],pm->pd[3],&xv1,&yv1);
  627.  scale2(pm->pd[4],pm->pd[5],&xv2,&yv2);
  628.  if(tikz_file)
  629.    fprintf(tikz_file,"\\draw[%s]", tikz_options(pm->color[0],0));
  630.  for(i1=0;i1<n1;i1++) {
  631.    xi1=rint(i1*xv1)+pm->p[0]; yi1=rint(i1*yv1)+pm->p[1];
  632.    for(i2=0;i2<n2;i2++) {
  633.      xi2=i2*xv2+xi1;yi2=i2*yv2+yi1;
  634.      gdImageSetPixel(image,xi2,yi2,pm->color[0]);
  635.      if(tikz_file) fprintf(tikz_file,"(%i,%i)circle(1pt)",xi2,flip(yi2));
  636.    }
  637.  }
  638.  if(tikz_file) fprintf(tikz_file,";\n");
  639. }
  640.  
  641. /* arc */
  642. void obj_arc(objparm *pm)
  643. {
  644.   scale(pm->pd,pm->p,1);
  645.   pm->p[2]=rint(pm->pd[2]*xscale); pm->p[3]=rint(pm->pd[3]*yscale);
  646.   gdImageArc(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3],
  647.            pm->pd[4],pm->pd[5],pm->color[0]);
  648.   if(tikz_file) {
  649.     pm->pd[4]-=360*rint(pm->pd[4]/360);
  650.     pm->pd[5]-=360*rint(pm->pd[5]/360);
  651.     if(pm->pd[4]>pm->pd[5]) pm->pd[5]+=360;
  652.     fprintf(tikz_file,
  653.     "\\draw\[%s, domain=%f:%f] plot ({%i+%f*cos(\\x)}, {%i+%f*sin(\\x)});\n",
  654.     tikz_options(pm->color[0],pm->fill),
  655.       pm->pd[4],pm->pd[5],pm->p[0],pm->p[2]*0.5,flip(pm->p[1]),pm->p[3]*(-0.5));
  656.   }
  657.   /*FIXME echelle mauvaise*/
  658.   if(vimg_enable) vimg_arc(scale_buf[0],scale_buf[1],
  659.                      0.5*pm->pd[2],0.5*pm->pd[3],pm->pd[4],pm->pd[5]);
  660. }
  661.  
  662. void obj_angle(objparm *pm)
  663. {
  664.   const double DEG=M_PI/180;
  665.   double dpts[6];
  666.   int pts[6], wx=rint(2*pm->pd[2]*xscale), wy=rint(2*pm->pd[2]*yscale);
  667.   dpts[0]=pm->pd[0];
  668.   dpts[1]=pm->pd[1];
  669.   dpts[2]=pm->pd[0]+pm->pd[2]*cos(DEG*pm->pd[3]);
  670.   dpts[3]=pm->pd[1]+pm->pd[2]*sin(DEG*pm->pd[3]);
  671.   dpts[4]=pm->pd[0]+pm->pd[2]*cos(DEG*pm->pd[4]);
  672.   dpts[5]=pm->pd[1]+pm->pd[2]*sin(DEG*pm->pd[4]);
  673.   scale(dpts, pts, 3);
  674.   gdImageLine(image,pts[0],pts[1],pts[2],pts[3],pm->color[0]);
  675.   gdImageLine(image,pts[0],pts[1],pts[4],pts[5],pm->color[0]);
  676.   gdImageArc(image,pts[0],pts[1],wx,wy,pm->pd[3],pm->pd[4],pm->color[0]);
  677.   if(tikz_file) {
  678.     fprintf(tikz_file, "\\draw\[%s, domain=%f:%f] plot ({%i+%f*cos(\\x)}, {%i+%f*sin(\\x)});\n",
  679.       tikz_options(pm->color[0],pm->fill),pm->pd[3],pm->pd[4],pts[0],wx*0.5,flip(pts[1]),wy*(-0.5));
  680.     fprintf(tikz_file, "\\draw\[%s] (%i, %i) -- (%i, %i) (%i, %i) -- (%i, %i);\n",
  681.         tikz_options(pm->color[0],pm->fill),pts[0],flip(pts[1]),pts[2],flip(pts[3]),pts[0],flip(pts[1]),pts[4],flip(pts[5]));
  682.   }
  683. }
  684. /* Ellipse: centre 0,1, width 2, hight 3, color 4,5,6 */
  685. void obj_ellipse(objparm *pm)
  686. {
  687.   scale(pm->pd,pm->p,1);
  688.   pm->p[2]=pm->pd[2]*xscale; pm->p[3]=pm->pd[3]*yscale;
  689.   if(pm->fill) {
  690.     gdImageArc(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3],0,360,
  691.              color_bounder);
  692.     patchgdImageFillToBorder(image,pm->p[0],pm->p[1],
  693.                     color_bounder,pm->color[0]);
  694.   }
  695.   gdImageArc(image,pm->p[0],pm->p[1],rint(pm->p[2]),rint(pm->p[3]),0,360,pm->color[0]);
  696.   if(tikz_file) fprintf(tikz_file,"\\draw\[%s] (%i,%i) ellipse (%i and %i);\n\n",
  697.     tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),(int) rint(0.5*pm->p[2]),(int) rint(0.5*pm->p[3]));
  698.   if(vimg_enable) vimg_ellipse(scale_buf[0],scale_buf[1],0.5*pm->pd[2],0.5*pm->pd[3]);
  699. }
  700.  
  701. /* Circle radius in pixels*/
  702. void obj_circle(objparm *pm)
  703. {
  704.   scale(pm->pd,pm->p,1);
  705.   pm->p[2]=rint(pm->pd[2]); pm->p[3]=rint(pm->pd[2]);
  706.   if(pm->fill) {
  707.     gdImageArc(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3],0,360,
  708.              color_bounder);
  709.     patchgdImageFillToBorder(image,pm->p[0],pm->p[1],
  710.                     color_bounder,pm->color[0]);
  711.   }
  712.   gdImageArc(image,pm->p[0],pm->p[1],pm->p[2],pm->p[3],0,360,pm->color[0]);
  713.   if(tikz_file) fprintf(tikz_file, "\\draw\[%s] (%i, %i) circle (%i);\n",
  714.       tikz_options(pm->color[0],pm->fill),pm->p[0],flip(pm->p[1]),(int) rint(pm->pd[2]/2.));
  715. }
  716. /* Circle, radius in xrange */
  717. void obj_circles(objparm *pm)
  718. {
  719.   int i, n;
  720.   n=(pm->pcnt)/3;
  721.   for (i=0; i<n; ++i) scale(pm->pd+3*i, pm->p+3*i, 1);
  722.   if (tikz_file) fprintf(tikz_file,"\\draw\[%s]",tikz_options(pm->color[0],pm->fill));
  723.   for(i=0;i<3*n;i+=3){
  724.     gdImageArc(image,pm->p[i],pm->p[i+1],
  725.       rint(2*pm->pd[i+2]*xscale),rint(2*pm->pd[i+2]*xscale),0,360,pm->color[0]);
  726.     if (tikz_file){
  727.       fprintf(tikz_file, "(%i, %i) circle (%i and %i)",
  728.         pm->p[i],flip(pm->p[i+1]),(int) rint(pm->pd[i+2]*xscale),(int) rint(pm->pd[i+2]*xscale));
  729.     }
  730.   }
  731.   if (tikz_file) fprintf(tikz_file,";\n");
  732. }
  733. /* ellipse, width in xrange,height in yrange */
  734. void obj_ellipses(objparm *pm)
  735. {
  736.   int i, n;
  737.   n=(pm->pcnt)/4;
  738.   for (i=0; i<n; ++i) scale(pm->pd+4*i, pm->p+4*i, 1);
  739.   if (tikz_file) fprintf(tikz_file,"\\draw\[%s]",tikz_options(pm->color[0],pm->fill));
  740.   for(i=0;i<4*n;i+=4){
  741.     gdImageArc(image,pm->p[i],pm->p[i+1],rint(pm->pd[i+2]*xscale),rint(pm->pd[i+3]*yscale),0,360,pm->color[0]);
  742.     if (tikz_file){
  743.       fprintf(tikz_file, "(%i, %i) circle (%i and %i)",
  744.         pm->p[i],flip(pm->p[i+1]),(int) rint(pm->pd[i+2]*xscale/2),(int) rint(pm->pd[i+3]*yscale/2));
  745.     }
  746.   }
  747.   if (tikz_file) fprintf(tikz_file,";\n");
  748. }
  749. typedef enum tikz_fill_options {grid, dot, hatch, diamond} tfo;
  750. int compar(const void *a, const void *b) {return *(int *)b - *(int *)a;}
  751.  
  752. static void tikz_fill(int x, int y, int nx, int ny, int wall, int the_color, tfo opt)
  753. {
  754.   int numpix=sizex*sizey, top = 0, a, c, cy, lx=0, rx=0, seed, nt,ct=0;
  755.   int *stack = xmalloc(numpix*sizeof(int));
  756.   int *stack2 = xmalloc(numpix*sizeof(int));
  757.   if (nx==0) nx=1; if (ny==0) ny=1; nt = abs(nx*ny);
  758.   seed = gdImageGetPixel(image,x,y);
  759.   char *check = xmalloc(numpix);
  760.   while (numpix--) check[numpix]=0;
  761.   a=x+y*sizex;
  762.   check[a]=1;
  763.   stack[top++]=a;
  764.   while(top)
  765.     {
  766.       a = stack[--top];
  767.       x = a%sizex; y = a/sizex;
  768.       c = gdImageGetPixel(image,x,y);
  769.       if ((wall && (c == wall))||(!wall && c!=seed))
  770.         continue;
  771.       if (x>0 && !check[a-1]) {check[a-1]=1; stack[top++]=a-1;}
  772.       if (x+1<sizex && !check[a+1]) {check[a+1]=1; stack[top++]=a+1;}
  773.       if (y>0 && !check[a-sizex]) {check[a-sizex]=1; stack[top++]=a-sizex;}
  774.       if (y+1<sizey && !check[a+sizex]) {check[a+sizex]=1; stack[top++]=a+sizex;}
  775.       switch(opt)
  776.   {
  777.   case grid: if(((x%nx)!=(nx/2))&&((y%ny)!=(ny/2))) continue; break;
  778.   case dot: if(x%nx!=nx/2||y%ny!=ny/2) continue; break;
  779.   case hatch: if((ny*x-nx*y+nt)%nt) continue; break;
  780.   case diamond: if((ny*x+nx*y)%nt && (ny*x-nx*y+nt)%nt)continue;
  781.   default: break;
  782.   }
  783.       stack2[ct++]=a;
  784.     }
  785.   free(stack);
  786.   free(check);
  787.   if (ct==0) return;
  788.   fprintf(tikz_file,"\\draw\[%s]", tikz_options(the_color,1));
  789.   qsort(stack2, ct, sizeof(int), compar);
  790.   cy=-1;
  791.   while (ct--)
  792.     {
  793.       a = stack2[ct];
  794.       x = a%sizex; y = a/sizex;
  795.       if (y != cy || x != rx+1)
  796.       {
  797.   if (cy >= 0)
  798.     fprintf(tikz_file,
  799.       "(%.2f,%.2f)rectangle(%.2f,%.2f)",
  800.       lx-0.0,flip(cy-0.0),rx+0.0,flip(cy+0.0));
  801.   cy = y;
  802.   lx = rx = x;
  803.       }
  804.       else
  805.   rx++;
  806.     }
  807.   fprintf(tikz_file,
  808.     "(%.2f,%.2f)rectangle(%.2f,%.2f);\n",
  809.      lx-0.0,flip(cy-0.0),rx+0.0,flip(cy+0.0));
  810.   free(stack2);
  811. }
  812.  
  813. /* flood fill */
  814. void obj_fill(objparm *pm)
  815. {
  816.   scale(pm->pd,pm->p,1);
  817.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],1,1,0,pm->color[0],grid);
  818.   patchgdImageFill(image,pm->p[0],pm->p[1],pm->color[0]);
  819. }
  820.  
  821. /* flood fill to border*/
  822. void obj_fillb(objparm *pm)
  823. {
  824.   scale(pm->pd,pm->p,1);
  825.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],1,1,pm->color[0],pm->color[1],grid);
  826.   patchgdImageFillToBorder(image,pm->p[0],pm->p[1],pm->color[0],pm->color[1]);
  827. }
  828.  
  829. gdImagePtr himg;
  830.  
  831. int makehatchimage(int x, int y, int px, int py, int col)
  832. {
  833.   int c1,c2,r,g,b;
  834.   gdImagePtr saveimg;
  835.   himg=gdImageCreate(x,y);
  836.   c1=gdImageGetPixel(image,px,py);
  837.   r=gdImageRed(image,c1); g=gdImageGreen(image,c1); b=gdImageBlue(image,c1);
  838.   if(r>=255) r--; else r++; if(g>=255) g--; else g++; if(b>=255) b--; else b++;
  839.   c1=gdImageColorAllocate(himg,r,g,b);
  840.   r=gdImageRed(image,col); g=gdImageGreen(image,col); b=gdImageBlue(image,col);
  841.   c2=gdImageColorAllocate(himg,r,g,b);
  842.   if(width>1) {
  843.     savew=-1; saveimg=image;
  844.     image=himg; c2=widthcolor(width,c2); image=saveimg;
  845.     c2=gdBrushed; savew=-1;
  846.   }
  847.   return c2;
  848. }
  849.  
  850. /* flood fill with hatching */
  851. void obj_hatchfill(objparm *pm)
  852. {
  853.   int nx,ny,ax,ay, dir, c;
  854.   scale(pm->pd,pm->p,1);
  855.   nx=pm->pd[2]; ny=pm->pd[3]; ax=abs(nx); ay=abs(ny);
  856.   if(nx==0 && ny==0) {fly_error("bad displacement vector"); return;}
  857.   if((nx>0 && ny>0) || (nx<0 && ny<0)) dir=1; else dir=-1;
  858.   if(ax==0) {ax=100; dir=2;}
  859.   if(ay==0) {ay=100; dir=3;}
  860.   c=makehatchimage(ax,ay,pm->p[0],pm->p[1],pm->color[0]);
  861.   switch(dir) {
  862.     case -1: {
  863.       gdImageLine(himg,0,ay-1,ax-1,0,c);
  864.       if(width>1) {
  865.         gdImageLine(himg,-ax,ay-1,-1,0,c);
  866.         gdImageLine(himg,ax,ay-1,2*ax-1,0,c);
  867.         gdImageLine(himg,0,-1,ax-1,-ay,c);
  868.         gdImageLine(himg,0,2*ay-1,ax-1,ay,c);
  869.       }
  870.       break;
  871.     }
  872.     case 1: {
  873.       gdImageLine(himg,0,0,ax-1,ay-1,c);
  874.       if(width>1) {
  875.         gdImageLine(himg,-ax,0,-1,ay-1,c);
  876.         gdImageLine(himg,ax,0,2*ax-1,ay-1,c);
  877.         gdImageLine(himg,0,-ay,ax-1,-1,c);
  878.         gdImageLine(himg,0,ay,ax-1,2*ay-1,c);
  879.       }
  880.       break;
  881.     }
  882.     case 2: gdImageLine(himg,0,ay/2,ax-1,ay/2,c); break;
  883.     case 3: gdImageLine(himg,ax/2,0,ax/2,ay-1,c); break;
  884.   }
  885.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],nx,ny,0,pm->color[0],hatch);
  886.   gdImageSetTile(image,himg);
  887.   patchgdImageFill(image,pm->p[0],pm->p[1],gdTiled);
  888.   gdImageDestroy(himg);
  889.   if(tiled) gdImageSetTile(image,tileimg);
  890. }
  891.  
  892. /* flood fill with grid */
  893. void obj_gridfill(objparm *pm)
  894. {
  895.   int nx,ny, c;
  896.   scale(pm->pd,pm->p,1);
  897.   nx=pm->pd[2]; ny=pm->pd[3]; nx=abs(nx); ny=abs(ny);
  898.   if(nx==0 && ny==0) {fly_error("bad grid size"); return;}
  899.   c=makehatchimage(nx,ny,pm->p[0],pm->p[1],pm->color[0]);
  900.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],nx,ny,0,pm->color[0],grid);
  901.   gdImageLine(himg,0,ny/2,nx-1,ny/2,c); gdImageLine(himg,nx/2,0,nx/2,ny-1,c);
  902.   gdImageSetTile(image,himg);
  903.   patchgdImageFill(image,pm->p[0],pm->p[1],gdTiled);
  904.   gdImageDestroy(himg);
  905.   if(tiled) gdImageSetTile(image,tileimg);
  906. }
  907.  
  908. /* flood fill with double hatching */
  909. void obj_diafill(objparm *pm)
  910. {
  911.   int nx,ny, c;
  912.   scale(pm->pd,pm->p,1);
  913.   nx=pm->pd[2]; ny=pm->pd[3]; nx=abs(nx); ny=abs(ny);
  914.   if(nx==0 && ny==0) {fly_error("bad grid size"); return;}
  915.   c=makehatchimage(nx,ny,pm->p[0],pm->p[1],pm->color[0]);
  916.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],nx,ny,0,pm->color[0],diamond);
  917.   gdImageLine(himg,0,0,nx-1,ny-1,c); gdImageLine(himg,0,ny-1,nx-1,0,c);
  918.   gdImageSetTile(image,himg);
  919.   patchgdImageFill(image,pm->p[0],pm->p[1],gdTiled);
  920.   gdImageDestroy(himg);
  921.   if(tiled) gdImageSetTile(image,tileimg);
  922. }
  923.  
  924. /* flood fill with dots */
  925. void obj_dotfill(objparm *pm)
  926. {
  927.   int nx,ny, c;
  928.   scale(pm->pd,pm->p,1);
  929.   nx=pm->pd[2]; ny=pm->pd[3]; nx=abs(nx); ny=abs(ny);
  930.   if(nx==0 && ny==0) {fly_error("bad grid size"); return;}
  931.   c=makehatchimage(nx,ny,pm->p[0],pm->p[1],pm->color[0]);
  932.   if (tikz_file) tikz_fill(pm->p[0],pm->p[1],nx,ny,0,pm->color[0],dot);
  933.   gdImageSetPixel(himg,nx/2,ny/2,c);
  934.   gdImageSetTile(image,himg);
  935.   patchgdImageFill(image,pm->p[0],pm->p[1],gdTiled);
  936.   gdImageDestroy(himg);
  937.   if(tiled) gdImageSetTile(image,tileimg);
  938. }
  939.  
  940. struct {
  941.   char *name;
  942.   gdFontPtr *fpt;
  943.   char *ftikz;
  944. } fonttab[]={
  945.   {"tiny",  &gdFontTiny,"0.3"},
  946.   {"small", &gdFontSmall,"0.5"},
  947.   {"medium",&gdFontMediumBold,"0.7"},
  948.   {"large", &gdFontLarge,"0.9"},
  949.   {"giant", &gdFontGiant,"1"},
  950.   {"huge",  &gdFontGiant,"1"}
  951. };
  952.  
  953. #define fonttab_no (sizeof(fonttab)/sizeof(fonttab[0]))
  954.  
  955. /* string */
  956. void obj_string(objparm *pm)
  957. {
  958.   char *pp, *pe, *p2;
  959.   int i;
  960.   pp=pm->str; pe=strchr(pp,','); if(pe==NULL) {
  961.     fly_error("too_few_parms"); return;
  962.   }
  963.   *pe++=0; pp=find_word_start(pp); *find_word_end(pp)=0;
  964.   pe=find_word_start(pe); strip_trailing_spaces(pe);
  965.   if(*pp) {
  966.     for(i=0;i<fonttab_no && strcmp(pp,fonttab[i].name)!=0; i++);
  967.     if(i>=fonttab_no) i=1;
  968.   }
  969.   else i=1;
  970.   scale(pm->pd,pm->p,1);
  971.   if(*pe=='"') {
  972.     p2=strchr(pe+1,'"');
  973.     if(p2 && *(p2+1)==0) {*p2=0; pe++;}
  974.   }
  975.   if(pm->fill){
  976.     gdImageStringUp(image,*(fonttab[i].fpt),pm->p[0],pm->p[1], (unsigned char*) pe,
  977.         pm->color[0]);
  978.     if(tikz_file) fprintf(tikz_file,"\\draw (%i,%i) node[scale=%s,rotate=90,color=%s,anchor=north west,inner sep=0pt] {\\(%s\\)};\n",
  979.       pm->p[0],flip(pm->p[1]),fonttab[i].ftikz,tikz_color(pm->color[0]),(unsigned char*) pe);
  980.   }
  981.   else {
  982.     gdImageString(image,*(fonttab[i].fpt),pm->p[0],pm->p[1], (unsigned char*) pe,
  983.         pm->color[0]);
  984.     if(tikz_file) fprintf(tikz_file,"\\draw (%i,%i) node[scale=%s,color=%s,anchor=north west,inner sep=0pt] {\\(%s\\)};\n",
  985.       pm->p[0],flip(pm->p[1]),fonttab[i].ftikz,tikz_color(pm->color[0]),(unsigned char*) pe);
  986.   }
  987. }
  988. /*FIXME; giant does not exist in tikz and ... samething as huge */
  989. /* point */
  990. void obj_point(objparm *pm)
  991. {
  992.   scale(pm->pd,pm->p,1);
  993.   gdImageSetPixel(image,pm->p[0],pm->p[1],pm->color[0]);
  994.   if(tikz_file) fprintf(tikz_file,"\\draw[%s] (%i,%i) circle (1pt);\n",
  995.     tikz_options(pm->color[0],0),pm->p[0],flip(pm->p[1]));
  996. }
  997.  
  998. /* copy an image file */
  999. void obj_copy(objparm *pm)
  1000. {
  1001.   char *pp;
  1002.   FILE *inf;
  1003.   gdImagePtr insimg;
  1004.  
  1005.   pp=find_word_start(pm->str);*find_word_end(pp)=0;
  1006.   inf=open4read(pp);
  1007.   if(inf==NULL) {
  1008.     fly_error("file_does_not_exist"); return;
  1009.   }
  1010.   insimg=gdImageCreateFromGif(inf); fclose(inf);
  1011.   if(insimg==NULL) {
  1012.     fly_error("bad_gif"); return;
  1013.   }
  1014.   scale(pm->pd,pm->p,1);
  1015.   if(pm->pd[2]<0 && pm->pd[3]<0 && pm->pd[4]<0 && pm->pd[5]<0)
  1016.     gdImageCopy(image,insimg,pm->p[0],pm->p[1],0,0,
  1017.             insimg->sx,insimg->sy);
  1018.   else
  1019.     gdImageCopy(image,insimg,pm->p[0],pm->p[1],pm->pd[2],pm->pd[3],
  1020.             pm->pd[4]-pm->pd[2],pm->pd[5]-pm->pd[3]);
  1021.   if(tikz_file) fprintf(tikz_file,
  1022.     "\\node[anchor=north west,inner sep=0pt] at (%i,%i) {\\includegraphics\[width=.05\\linewidth]{%s}};\n",
  1023.       pm->p[0],flip(pm->p[1]),pm->str);
  1024.     gdImageDestroy(insimg);
  1025. /*FIXME position non correcte; on ne peut pas utiliser une image gif */
  1026. }
  1027.  
  1028. /* copy an image file, with resizing */
  1029. void obj_copyresize(objparm *pm)
  1030. {
  1031.   char *pp;
  1032.   FILE *inf;
  1033.   gdImagePtr insimg;
  1034.  
  1035.   pp=find_word_start(pm->str);*find_word_end(pp)=0;
  1036.   inf=open4read(pp);
  1037.   if(inf==NULL) {
  1038.     fly_error("file_not_found"); return;
  1039.   }
  1040.   insimg=gdImageCreateFromGif(inf); fclose(inf);
  1041.   if(insimg==NULL) {
  1042.     fly_error("bad_gif"); return;
  1043.   }
  1044.   scale(pm->pd+4,pm->p+4,2);
  1045.   if(pm->pd[0]<0 && pm->pd[1]<0 && pm->pd[2]<0 && pm->pd[3]<0)
  1046.     gdImageCopyResized(image,insimg,pm->p[4],pm->p[5],0,0,
  1047.                  pm->p[6]-pm->p[4]+1,pm->p[7]-pm->p[5]+1,
  1048.                  insimg->sx,insimg->sy);
  1049.   else
  1050.     gdImageCopyResized(image,insimg,pm->p[4],pm->p[5],pm->pd[0],pm->pd[1],
  1051.                  pm->p[6]-pm->p[4]+1,pm->p[7]-pm->p[5]+1,
  1052.                  pm->pd[2]-pm->pd[0]+1,pm->pd[3]-pm->pd[1]+1);
  1053.   gdImageDestroy(insimg);
  1054. }
  1055.  
  1056. /* set brush or tile */
  1057. void obj_setbrush(objparm *pm)
  1058. {
  1059.   char *pp;
  1060.   FILE *inf;
  1061.   gdImagePtr insimg;
  1062.  
  1063.   pp=find_word_start(pm->str); *find_word_end(pp)=0;
  1064.   inf=open4read(pp); if(inf==NULL) {
  1065.     fly_error("file_not_found"); return;
  1066.   }
  1067.   insimg=gdImageCreateFromGif(inf); fclose(inf);
  1068.   if(insimg==NULL) {
  1069.     fly_error("bad_gif"); return;
  1070.   }
  1071.   if(pm->fill) {
  1072.     gdImageSetTile(image,insimg); tiled=1; tileimg=insimg;
  1073.   }
  1074.   else {
  1075.     gdImageSetBrush(image,insimg);brushed=1; brushimg=insimg;
  1076.   }
  1077. }
  1078.  
  1079. /* kill brush */
  1080. void obj_killbrush(objparm *pm)
  1081. {
  1082.   if(brushimg) gdImageDestroy(brushimg);
  1083.   brushed=0; brushimg=NULL;
  1084. }
  1085.  
  1086. /* kill tile */
  1087. void obj_killtile(objparm *pm)
  1088. {
  1089.   if(tileimg) gdImageDestroy(tileimg);
  1090.   tiled=0; tileimg=NULL;
  1091. }
  1092.  
  1093. /* set style */
  1094. void obj_setstyle(objparm *pm)
  1095. {
  1096.   int i,t;
  1097.   t=pm->pcnt/3; if(t<=0) {
  1098.     fly_error("too_few_parms"); return;
  1099.   }
  1100.   for(i=0;i<t;i++) {
  1101.     if(pm->pd[3*i]<0 || pm->pd[3*i+1]<0 || pm->pd[3*i+2]<0)
  1102.       pm->p[i]=gdTransparent;
  1103.     else
  1104.       pm->p[i]=getcolor(pm->pd[3*i],pm->pd[3*i+1],pm->pd[3*i+2]);
  1105.   }
  1106.   gdImageSetStyle(image,pm->p,t); styled=1;
  1107. }
  1108.  
  1109. /* kill style */
  1110. void obj_killstyle(objparm *pm)
  1111. {
  1112.   styled=0;
  1113. }
  1114.  
  1115. /* set transparent */
  1116. void obj_transp(objparm *pm)
  1117. {
  1118.   gdImageColorTransparent(image,pm->color[0]);
  1119. }
  1120.  
  1121. /* set interlace */
  1122. void obj_interlace(objparm *pm)
  1123. {
  1124.   gdImageInterlace(image,1);
  1125. }
  1126.  
  1127. /* set linewidth */
  1128. void obj_linewidth(objparm *pm)
  1129. {
  1130.   if(pm->pd[0]<1 || pm->pd[0]>255) fly_error("bad_parms");
  1131.   width=pm->pd[0];
  1132.   if(tikz_file) fprintf(tikz_file,"\\pgfsetlinewidth{%fpt}\n",width*0.7);
  1133. }
  1134.  
  1135. /* set crosshairsize */
  1136. void obj_crosshairsize(objparm *pm)
  1137. {
  1138.   if(pm->pd[0]<1 || pm->pd[0]>255) fly_error("bad_parms");
  1139.   else width2=pm->pd[0];
  1140. }
  1141.  
  1142. /* set x range */
  1143. void obj_xrange(objparm *pm)
  1144. {
  1145.   double dd;
  1146.   dd=pm->pd[1]-pm->pd[0];
  1147.   xstart=pm->pd[0]; xscale=sizex/dd;
  1148. }
  1149.  
  1150. /* set y range */
  1151. void obj_yrange(objparm *pm)
  1152. {
  1153.   double dd;
  1154.   dd=pm->pd[1]-pm->pd[0];
  1155.   ystart=pm->pd[1]; yscale=-sizey/dd;
  1156. }
  1157.  
  1158. /* set x et y range */
  1159. void obj_range(objparm *pm)
  1160. {
  1161.   double d1,d2;
  1162.   d1=pm->pd[1]-pm->pd[0]; d2=pm->pd[3]-pm->pd[2];
  1163.   xstart=pm->pd[0]; xscale=(sizex-1)/d1;
  1164.   ystart=pm->pd[3]; yscale=-(sizey-1)/d2;
  1165. }
  1166.  
  1167. /* set t range */
  1168. void obj_trange(objparm *pm)
  1169. {
  1170.   /*double dd;
  1171.   dd=pm->pd[1]-pm->pd[0];*/
  1172.   tstart=pm->pd[0]; tend=pm->pd[1];
  1173.   tranged=1;
  1174. }
  1175.  
  1176. /* set tstep (plotting step) */
  1177. void obj_tstep(objparm *pm)
  1178. {
  1179.   int dd;
  1180.   dd=pm->pd[0];
  1181.   if(dd<3) {
  1182.     fly_error("bad_step"); return;
  1183.   }
  1184.   if(dd>2000) dd=2000;
  1185.   tstep=dd;
  1186. }
  1187.  
  1188. /* set plotjump (plot jump break threashold) */
  1189. void obj_plotjump(objparm *pm)
  1190. {
  1191.   int dd;
  1192.   dd=pm->pd[0];
  1193.   if(dd<3) dd=3;
  1194.   if(dd>MAX_SIZE) dd=MAX_SIZE;
  1195.   plotjump=dd;
  1196. }
  1197.  
  1198. /* plot a curve, either parametric or explicit */
  1199. void _obj_plot(objparm *pm,int dash)
  1200. {
  1201.   int i,j,n,dist,xx,yy,varpos;
  1202.   char p1[MAX_LINELEN+1], p2[MAX_LINELEN+1];
  1203.   char *varn, *pp;
  1204.   double dc[2],t,v;
  1205.   int ic[2],oc[2];
  1206.  
  1207.   n=itemnum(pm->str);
  1208.   if(n<1) {
  1209.     fly_error("bad_parms"); return;
  1210.   }
  1211.   fnd_item(pm->str,1,p1); fnd_item(pm->str,2,p2);
  1212.   if(n==1 && !tranged) v=sizex/xscale/tstep;
  1213.   else v=(tend-tstart)/tstep;
  1214.   if(n==1) varn="x"; else varn="t";
  1215.   for(pp=varchr(p1,varn); pp; pp=varchr(pp,varn)) {
  1216.     string_modify(p1,pp,pp+strlen(varn),EV_T);
  1217.     pp+=strlen(EV_T);
  1218.   }
  1219.   for(pp=varchr(p2,varn); pp; pp=varchr(pp,varn)) {
  1220.     string_modify(p2,pp,pp+strlen(varn),EV_T);
  1221.       pp+=strlen(EV_T);
  1222.   }
  1223.   varpos=eval_getpos(EV_T);
  1224.   if(varpos<0) return; /* unknown error */
  1225.   evalue_compile(p1); evalue_compile(p2);
  1226.   if(vimg_enable) vimg_plotstart();
  1227.   if (tikz_file) fprintf(tikz_file,"\%\%begin plot\n\\draw\[%s]",
  1228.     tikz_options(pm->color[0],-dash));
  1229.   for(i=j=0;i<=tstep;i++) {
  1230.     if(n==1) {
  1231.       if(tranged) t=tstart+i*v; else t=xstart+i*v;
  1232.       eval_setval(varpos,t); dc[0]=t; dc[1]=strevalue(p1);
  1233.     }
  1234.     else {
  1235.       t=tstart+i*v; eval_setval(varpos,t);
  1236.       dc[0]=strevalue(p1); dc[1]=strevalue(p2);
  1237.     }
  1238.     if(!isfinite(dc[0]) || !isfinite(dc[1])) ic[0]=ic[1]=-BOUND;
  1239.     else scale(dc,ic,1);
  1240.     if(vimg_enable) vimg_plot1 (scale_buf[0],scale_buf[1]);
  1241.     if(j==0) {
  1242.       gdImageSetPixel(image,ic[0],ic[1],pm->color[0]); j++;
  1243.       if (tikz_file)
  1244.         fprintf(tikz_file,"(%i,%i)rectangle(%i,%i)",
  1245.           ic[0],flip(ic[1]),ic[0]+1,flip(ic[1]+1));
  1246.     }
  1247.     else {
  1248.       xx=ic[0]-oc[0]; yy=ic[1]-oc[1];
  1249.       dist=sqrt(xx*xx+yy*yy);
  1250.       if(dist>0){
  1251.         if(dist>plotjump || dist==1) {
  1252.           gdImageSetPixel(image,ic[0],ic[1],pm->color[0]);
  1253.           if (tikz_file)
  1254.             fprintf(tikz_file,"(%i,%i)rectangle(%i,%i)",
  1255.               ic[0],flip(ic[1]),ic[0]+1,flip(ic[1]+1));
  1256.         }
  1257.         else {
  1258.           if (dash==1)
  1259.             gdImageDashedLine(image,oc[0],oc[1],ic[0],ic[1],pm->color[0]);
  1260.           else
  1261.             gdImageLine(image,oc[0],oc[1],ic[0],ic[1],pm->color[0]);
  1262.           if (tikz_file)
  1263.             fprintf(tikz_file, "(%i,%i)--(%i,%i)",
  1264.                 oc[0],flip(oc[1]),ic[0],flip(ic[1]));
  1265.         }
  1266.       }
  1267.     }
  1268.     memmove(oc,ic,sizeof(oc));
  1269.   }
  1270.   if (tikz_file) fprintf(tikz_file,";\n\%\%end plot\n");
  1271.   if(vimg_enable) vimg_plotend();
  1272. }
  1273.  
  1274. void obj_plot(objparm *pm) { _obj_plot( pm,0) ;}
  1275. void obj_dplot(objparm *pm) { _obj_plot( pm,1) ; }
  1276.  
  1277. /* set levelcurve granularity */
  1278. void obj_levelstep(objparm *pm)
  1279. {
  1280.   int dd;
  1281.   dd=pm->pd[0];
  1282.   if(dd<1) return;
  1283.   if(dd>16) dd=16;
  1284.   lstep=dd;
  1285. }
  1286.  
  1287. /* level curve */
  1288. void obj_levelcurve(objparm *pm)
  1289. {
  1290.   char fn[MAX_LINELEN+1],tc[MAX_LINELEN+1];
  1291.   int n,i;
  1292.   double d;
  1293.   leveldata *ld;
  1294.  
  1295.   ld=xmalloc(sizeof(leveldata)+16);
  1296.   ld->xname="x"; ld->yname="y";
  1297.   ld->xsize=sizex; ld->ysize=sizey; ld->datacnt=0;
  1298.   ld->xrange[0]=xstart; ld->xrange[1]=sizex/xscale+xstart;
  1299.   ld->yrange[0]=sizey/yscale+ystart; ld->yrange[1]=ystart;
  1300.   ld->grain=lstep;
  1301.   fnd_item(pm->str,1,fn); ld->fn=fn;
  1302.   n=itemnum(pm->str);
  1303.   if(n<=1) {ld->levelcnt=1; ld->levels[0]=0;}
  1304.   else {
  1305.     if(n>LEVEL_LIM+1) n=LEVEL_LIM+1;
  1306.     for(i=0;i<n-1;i++) {
  1307.       fnd_item(pm->str,i+2,tc);
  1308.       d=strevalue(tc);
  1309.       if(isfinite(d)) ld->levels[i]=d; else ld->levels[i]=0;
  1310.     }
  1311.     ld->levelcnt=n-1;
  1312.   }
  1313.   levelcurve(ld);
  1314.   if (tikz_file)
  1315.     fprintf(tikz_file,"\%\%begin levelcurve\n\\draw\[%s]"
  1316.       ,tikz_options(pm->color[0],1));
  1317.   for(i=0;i<ld->datacnt;i++) {
  1318.     gdImageSetPixel(image,ld->xdata[i],ld->ydata[i],pm->color[0]);
  1319.     if (tikz_file)
  1320.       fprintf(tikz_file,
  1321.         "(%i,%i)rectangle(%i,%i)",
  1322.         ld->xdata[i],flip(ld->ydata[i]),ld->xdata[i]+1,flip(ld->ydata[i]+1));
  1323.   }
  1324.   if (tikz_file) fprintf(tikz_file,";\n\%\%end levelcurve\n");
  1325.   free(ld);
  1326. }
  1327.  
  1328. /* set animation step */
  1329. void obj_animstep(objparm *pm)
  1330. {
  1331.   animstep=pm->pd[0];
  1332.   setvar("animstep",pm->pd[0]);
  1333. }
  1334.  
  1335. /* Starts a line counting */
  1336. void obj_linecount(objparm *pm)
  1337. {
  1338.   linecnt=pm->pd[0];
  1339. }
  1340.  
  1341. /* marks end of execution */
  1342. void obj_end(objparm *pm)
  1343. {
  1344.   fly_error("successful_end_of_execution");
  1345. }
  1346.  
  1347. /* output */
  1348. void obj_output(objparm *pm)
  1349. {
  1350.   char *p, namebuf[1024];
  1351.   p=find_word_start(pm->str); *find_word_end(p)=0;
  1352.   snprintf(namebuf,sizeof(namebuf),"%s",imagefilename);
  1353.   snprintf(imagefilename,sizeof(imagefilename),"%s",p);
  1354.   output();
  1355.   snprintf(imagefilename,sizeof(imagefilename),"%s",namebuf);
  1356. }
  1357.  
  1358. /* vimgfile */
  1359. void obj_vimgfile(objparm *pm)
  1360. {
  1361.   char *p;
  1362.   p=find_word_start(pm->str); *find_word_end(p)=0;
  1363.   snprintf(vimgfilename,sizeof(vimgfilename),"%s",p);
  1364.   if(vimg_ready) vimg_close();
  1365. }
  1366.  
  1367. /* vimg enable/disable */
  1368. void obj_vimg(objparm *pm)
  1369. {
  1370.   vimg_enable=pm->pd[0];
  1371.   if(vimg_enable>0 && vimg_ready==0) vimg_init();
  1372. }
  1373.  
  1374. /* Set affine transformation */
  1375. void obj_affine(objparm *pm)
  1376. {
  1377.   int i;
  1378.   for(i=0;i<4;i++) matrix[i]=pm->pd[i];
  1379.   transx=pm->pd[4]; transy=pm->pd[5];
  1380.   transform=1;
  1381. }
  1382.  
  1383. /* Set affine transformation */
  1384. void obj_rotation(objparm *pm)
  1385. {
  1386.   double r;
  1387.   r=M_PI*pm->pd[0]/180;
  1388.   matrix[0]=matrix[3]=cos(r);
  1389.   matrix[1]=-sin(r); matrix[2]=sin(r);
  1390.   transform=1;
  1391. }
  1392.  
  1393. /* Set linear transformation */
  1394. void obj_linear(objparm *pm)
  1395. {
  1396.   int i;
  1397.   for(i=0;i<4;i++) matrix[i]=pm->pd[i];
  1398.   transform=1;
  1399. }
  1400.  
  1401. /* Set translation transformation */
  1402. void obj_translation(objparm *pm)
  1403. {
  1404.   transx=pm->pd[0]; transy=pm->pd[1];
  1405. }
  1406.  
  1407. /* kill affine transformation */
  1408. void obj_killaffine(objparm *pm)
  1409. {
  1410.   matrix[0]=matrix[3]=1;
  1411.   matrix[1]=matrix[2]=transx=transy=0;
  1412.   transform=0;
  1413. }
  1414.  
  1415. /* kill affine transformation */
  1416. void obj_killlinear(objparm *pm)
  1417. {
  1418.   matrix[0]=matrix[3]=1;
  1419.   matrix[1]=matrix[2]=0;
  1420.   transform=0;
  1421. }
  1422.  
  1423. /* kill affine transformation */
  1424. void obj_killtranslation(objparm *pm)
  1425. {
  1426.   transx=transy=0;
  1427. }
  1428.  
  1429. /***** Les modifs de Jean-Christophe Leger Fev 2006 *****/
  1430.  
  1431. /* arguments: un numero de matrice entre 1 et JC_NB_MATRICES, une liste de 4 nombres reels pour la matrice */
  1432. void obj_setmatrix(objparm *pm)
  1433. {
  1434.   int nummatrix = (int) (pm->pd[0]);
  1435.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1436.     fly_error("bad_matrix_number");
  1437.     return;
  1438.   }
  1439.   matrices_pavage[nummatrix][0] = pm->pd[1];
  1440.   matrices_pavage[nummatrix][1] = pm->pd[2];
  1441.   matrices_pavage[nummatrix][2] = pm->pd[3];
  1442.   matrices_pavage[nummatrix][3] = pm->pd[4];
  1443. }
  1444.  
  1445. /* arguments: un numero de matrice entre 1 et JC_NB_MATRICES */
  1446. void obj_resetmatrix(objparm *pm)
  1447. {
  1448.   int nummatrix = (int) (pm->pd[0]);
  1449.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1450.     fly_error("bad_matrix_number");
  1451.     return;
  1452.   }
  1453.   matrices_pavage[nummatrix][0] = 1;
  1454.   matrices_pavage[nummatrix][1] = 0;
  1455.   matrices_pavage[nummatrix][2] = 0;
  1456.   matrices_pavage[nummatrix][3] = 1;
  1457.  
  1458. }
  1459. /* arguments: un numero de vecteur entre 1 et JC_NB_MATRICES, une liste de 2 nombres reels pour le vecteur */
  1460. void obj_setvector(objparm *pm)
  1461. {
  1462.   int nummatrix = (int) (pm->pd[0]);
  1463.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1464.     fly_error("bad_vector_number");
  1465.     return;
  1466.   }
  1467.   vecteurs_pavage[nummatrix][0] = pm->pd[1];
  1468.   vecteurs_pavage[nummatrix][1] = pm->pd[2];
  1469. }
  1470.  
  1471. /* arguments: un numero de matrice entre 1 et JC_NB_MATRICES */
  1472. void obj_resetvector(objparm *pm)
  1473. {
  1474.   int nummatrix = (int) (pm->pd[0]);
  1475.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1476.     fly_error("bad_vector_number");
  1477.     return;
  1478.   }
  1479.   vecteurs_pavage[nummatrix][0] = 0;
  1480.   vecteurs_pavage[nummatrix][1] = 0;
  1481. }
  1482.  
  1483. /* arguments: un numero de vecteur entre 1 et JC_NB_MATRICES, une liste de 6 nombres reels pour la matrice et le vecteur */
  1484. void obj_settransform(objparm *pm)
  1485. {
  1486.   int nummatrix = (int) (pm->pd[0]);
  1487.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1488.     fly_error("bad_vector_number");
  1489.     return;
  1490.   }
  1491.   matrices_pavage[nummatrix][0] = pm->pd[1];
  1492.   matrices_pavage[nummatrix][1] = pm->pd[2];
  1493.   matrices_pavage[nummatrix][2] = pm->pd[3];
  1494.   matrices_pavage[nummatrix][3] = pm->pd[4];
  1495.   vecteurs_pavage[nummatrix][0] = pm->pd[5];
  1496.   vecteurs_pavage[nummatrix][1] = pm->pd[6];
  1497. }
  1498.  
  1499.  
  1500. /* arguments: un numero de matrice entre 1 et JC_NB_MATRICES */
  1501. void obj_resettransform(objparm *pm)
  1502. {
  1503.   int nummatrix = (int) (pm->pd[0]);
  1504.   if((nummatrix < 1) ||(nummatrix>JC_NB_MATRICES)) {
  1505.     fly_error("bad_vector_number");
  1506.     return;
  1507.   }
  1508.   vecteurs_pavage[nummatrix][0] = 0;
  1509.   vecteurs_pavage[nummatrix][1] = 0;
  1510.   matrices_pavage[nummatrix][0] = 1;
  1511.   matrices_pavage[nummatrix][1] = 0;
  1512.   matrices_pavage[nummatrix][2] = 0;
  1513.   matrices_pavage[nummatrix][3] = 1;
  1514. }
  1515.  
  1516. /* arguments: une liste de 6 nombres reels pour les coordonnees de l'origine et des vecteurs de base */
  1517. void obj_setparallelogram(objparm *pm)
  1518. {
  1519.   int i;
  1520.   for(i=0;i<6;i++)  parallogram_fonda[i]=pm->pd[i];
  1521. }
  1522.  
  1523. /* arguments :aucun */
  1524. void obj_resetparallelogram(objparm *pm)
  1525. {
  1526.   parallogram_fonda[0]=0;
  1527.   parallogram_fonda[1]=0;
  1528.   parallogram_fonda[2]=100;
  1529.   parallogram_fonda[3]=0;
  1530.   parallogram_fonda[4]=0;
  1531.   parallogram_fonda[5]=100;
  1532. }
  1533.  
  1534. /* argument : la liste des numeros des matrices a faire agir, le nom du fichier de l'image a inclure */
  1535. void obj_multicopy(objparm *pm)
  1536. {
  1537.   char *pp,*pe,*cptr;
  1538.   FILE *inf;
  1539.   gdImagePtr insimg;
  1540.   int i,j;
  1541.   int imax,jmax;
  1542.   int c; /* la couleur reperee */
  1543.   int mat;
  1544.   int nummatrices[JC_NB_MATRICES];
  1545.   double pt[2]; /* les coordonnees math. du point repere dans le parallelogramme */
  1546.   double ptr[2]; /* les coordonnees math. du point transforme */
  1547.   int pti[2]; /* les coordonnees img du point a placer sur le canevas */
  1548.   int t;
  1549.   /* gestion palette de couleur de l'image a inserer */
  1550.   int colorMap[gdMaxColors];
  1551.   int comptmat=0; /* combien de matrices en tout ? */
  1552.  
  1553.   for (i=0; (i<gdMaxColors); i++) {
  1554.     colorMap[i] = (-1);
  1555.   }
  1556.  
  1557.   /* Gestion des parametres la liste est censee finir avec le nom du fichier */
  1558.   t=pm->pcnt-1; /* il faut enlever le nom de fichier ! c'est le nombre de parametres en plus */
  1559.   pp=find_word_start(pm->str);
  1560.   /* visiblement find_word_start n'arrive pas a trouver le dernier mot dans un contexte ou le nombre de parameters est variable
  1561.      * on cherche donc l'emplacement de la derniere virgule:
  1562.      * il y en a une car t>0, on retrouve ensuite le debut de mot
  1563.      */
  1564.   for(pe=pp;*pe!=0;pe++);/* trouve la fin de la chaine */
  1565.   if(t>0){
  1566.     for(cptr = pe; cptr > pp && *cptr != ','; cptr--);
  1567.     pp=find_word_start(cptr+1);
  1568.   }
  1569.   pe=find_word_end(pp);*pe=0; /* strip junk final */
  1570.   //      printf("pp contient %s\n",pp);
  1571.  
  1572.  
  1573.   inf=open4read(pp);
  1574.   if(inf==NULL) {
  1575.     fly_error("file_not_exist"); return;
  1576.   }
  1577.   insimg=gdImageCreateFromGif(inf); fclose(inf);
  1578.   if(insimg==NULL) {
  1579.     fly_error("bad_gif"); return;
  1580.   }
  1581.  
  1582.   /* On recupere les numeros des matrices/vecteurs a faire agir,
  1583.     * s'il n'y en a pas, on les fait toutes agir
  1584.   */
  1585.   for(i=0;i<t && i< JC_NB_MATRICES;i++) {
  1586.     if(pm->pd[i]>=1 && pm->pd[i]<=JC_NB_MATRICES){
  1587.       nummatrices[comptmat] = pm->pd[i];
  1588.       comptmat++;
  1589.     }
  1590.   }
  1591.   if(t<=0){
  1592.     for(i=0;i<JC_NB_MATRICES;i++) {
  1593.       nummatrices[i] = i+1;
  1594.     }
  1595.     comptmat=JC_NB_MATRICES;
  1596.   }
  1597.  
  1598.  
  1599.   imax = gdImageSX(insimg);
  1600.   jmax = gdImageSY(insimg);
  1601.  
  1602.   for(i=0;i<imax;i++){
  1603.     for(j=0;j<jmax;j++){
  1604.       int nc;
  1605.       c=gdImageGetPixel(insimg,i,j);
  1606.       /* Le code suivant est une copie du code dans gdImageCopy  Added 7/24/95: support transparent copies */
  1607.       if (gdImageGetTransparent(insimg) != c) {
  1608.         /* Have we established a mapping for this color? */
  1609.         if (colorMap[c] == (-1)) {
  1610.           /* If it's the same image, mapping is trivial, dans notre cas ca n'arrive jamais... */
  1611.           if (image == insimg) {
  1612.             nc = c;
  1613.           } else {
  1614.             /* First look for an exact match */
  1615.             nc = gdImageColorExact(image,
  1616.                    insimg->red[c], insimg->green[c],
  1617.                            insimg->blue[c]);
  1618.           }
  1619.           if (nc == (-1)) {
  1620.           /* No, so try to allocate it */
  1621.             nc = gdImageColorAllocate(image,
  1622.                              insimg->red[c], insimg->green[c],
  1623.                              insimg->blue[c]);
  1624.              /* If we're out of colors, go for the closest color */
  1625.             if (nc == (-1)) {
  1626.               nc = gdImageColorClosest(image,
  1627.                               insimg->red[c], insimg->green[c],
  1628.                               insimg->blue[c]);
  1629.             }
  1630.           }
  1631.           colorMap[c] = nc;
  1632.         }
  1633.  
  1634.         pt[0]= i*(parallogram_fonda[2])/(imax-1)+(jmax-j)*(parallogram_fonda[4])/(jmax-1)+parallogram_fonda[0];
  1635.         pt[1]= i*(parallogram_fonda[3])/(imax-1)+(jmax-j)*(parallogram_fonda[5])/(jmax-1)+parallogram_fonda[1];
  1636.         for(mat=0;mat<comptmat;mat++){
  1637.           double *matricecourante = matrices_pavage[nummatrices[mat]];
  1638.           double *vecteurcourant = vecteurs_pavage[nummatrices[mat]];
  1639.           ptr[0] = matricecourante[0]*pt[0]+matricecourante[1]*pt[1]+vecteurcourant[0];
  1640.           ptr[1] = matricecourante[2]*pt[0]+matricecourante[3]*pt[1]+vecteurcourant[1];
  1641.           scale(ptr,pti,1);
  1642.           gdImageSetPixel(image,pti[0],pti[1],colorMap[c]);
  1643.         }
  1644.       }
  1645.     }
  1646.   }
  1647.   gdImageDestroy(insimg);
  1648. }
  1649.  
  1650. /**** Fin modifs JC Fev 06 ******/
  1651.  
  1652. /* get color from value */
  1653. int calc_color(char *p, struct objtab *o)
  1654. {
  1655.   int k, cc[3];
  1656.   char buf[MAX_LINELEN+1];
  1657.   for(k=0;k<3;k++) {
  1658.     fnd_item(p,k+1,buf);
  1659.     cc[k]=strevalue(buf);
  1660.   }
  1661.   collapse_item(p,3);
  1662.   if(cc[0]==-1 && cc[1]==-1 && cc[2]==-255) {
  1663.  
  1664.     if(brushed && o->subst&1) return gdBrushed;
  1665.     else return color_black;
  1666.   }
  1667.   if(cc[0]==-1 && cc[1]==-255 && cc[2]==-1) {
  1668.     if(styled && o->subst&2)  return gdStyled;
  1669.     else return color_black;
  1670.   }
  1671.   if(cc[0]==-255 && cc[1]==-1 && cc[2]==-1) {
  1672.     if(tiled && o->fill_tag==1)  return gdTiled;
  1673.     else return color_black;
  1674.   }
  1675.   return getcolor(cc[0],cc[1],cc[2]);
  1676. }
  1677.  
  1678. /* Routine to parse parameters */
  1679. int parse_parms(char *p,objparm *pm,struct objtab *o)
  1680. {
  1681.   char buf[MAX_LINELEN+1];
  1682.   char *p1, *p2;
  1683.   int j,t,c,c1,c2;
  1684.  
  1685.   c=o->color_pos;c1=c2=0;
  1686.   pm->color[0]=pm->color[1]=0;
  1687.   if(c>0) c1=c;
  1688.   if(c<0) c2=-c;
  1689.   c=c1+c2;
  1690.   t=itemnum(p);if(t<o->required_parms+3*c) return -1;
  1691.   if(c1>0 && t>o->required_parms+3*c) t=o->required_parms+3*c;
  1692.   pm->pcnt=t-3*c;
  1693.   if(pm->pcnt>MAX_PARMS) pm->pcnt=MAX_PARMS;
  1694.   if(c2>0) {
  1695.     for(j=0;j<2 && j<c2; j++) pm->color[j]=calc_color(p,o);
  1696.   }
  1697.   snprintf(buf,sizeof(buf),"%s",p);
  1698.   for(j=0, p1=buf; j<pm->pcnt; j++, p1=p2) {
  1699.     p2=find_item_end(p1); if(*p2) *p2++=0;
  1700.     p1=find_word_start(p1);
  1701.     if(*p1) pm->pd[j]=strevalue(p1); else pm->pd[j]=0;
  1702.     if(!isfinite(pm->pd[j])) {
  1703.         if(j<o->required_parms) return -1;
  1704.         else {pm->pd[j]=0;break;}
  1705.     }
  1706.   }
  1707.   collapse_item(p,o->required_parms);
  1708.   if(c1>0) {
  1709.     for(j=0;j<c1 && j<2; j++) pm->color[j]=calc_color(p,o);
  1710.   }
  1711.   if(width>1 && o->subst&1 && pm->color[0]!=gdBrushed
  1712.       && pm->color[0]!=gdStyled && pm->color[0]!=gdTiled) {
  1713.     pm->color[1]=pm->color[0];
  1714.     pm->color[0]=widthcolor(width,pm->color[0]);
  1715.   }
  1716.   pm->fill=o->fill_tag;
  1717.   ovlstrcpy(pm->str,p); return 0;
  1718. }
  1719.  
  1720. /* Create the struct objparm pm corresponding to the objparm p
  1721.  * Execute a command. Returns 0 if OK.
  1722.  */
  1723. int obj_main(char *p)
  1724. {
  1725.   int i;
  1726.   char *pp,*name,*pt;
  1727.   char tbuf2[MAX_LINELEN+1];
  1728.   struct objparm pm;
  1729.  
  1730.   p=find_word_start(p);
  1731.   if(*p==exec_prefix_char || *p==0) return 0; /* comment */
  1732.   name=p;
  1733.   pp=find_name_end(p);
  1734.   pt=find_word_start(pp); if(*pt=='=') *pt=' ';
  1735.   if(*pt==':' && *(pt+1)=='=') *pt=*(pt+1)=' ';
  1736.   pp=find_word_end(p);
  1737.   if(*pp!=0) {
  1738.     *(pp++)=0; pp=find_word_start(pp);
  1739.   }
  1740.   if(strlen(p)==1 || (strlen(p)==2 && isdigit(*(p+1)))) {
  1741.     setvar(p,strevalue(pp)); return 0;
  1742.   }
  1743.   /* search the number of the object */
  1744.   i=search_list(objtab,obj_no,sizeof(objtab[0]),name);
  1745.   if(i<0) {
  1746.     fly_error("bad_cmd"); return 1;
  1747.   }
  1748.   if(image==NULL && (objtab[i].color_pos || objtab[i].required_parms>2)) {
  1749.     fly_error("image_not_defined"); return 1;
  1750.   }
  1751.   ovlstrcpy(tbuf2,pp);
  1752.   if(objtab[i].color_pos || objtab[i].routine==obj_setstyle) {
  1753.     substit(tbuf2);
  1754.   }
  1755.   if(parse_parms(tbuf2,&pm,objtab+i)!=0) fly_error("bad_parms");
  1756.   else objtab[i].routine(&pm);
  1757.   return 0;
  1758. }
  1759.