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