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  1. /*    Copyright (C) 2002-2003 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. /* dvi 2 gif driver, gf font loader and processor */
  19.  
  20. int g;
  21. FONTHEADER *fh;
  22. int brush, x,y,xmax,ymax,thischar,xsize,charsize,charcnt,charpos;
  23. int chswitch;
  24. long int datapos;
  25. char *onechar;
  26. unsigned char *gfbuf;
  27. int gfbuflen;
  28. FILE *fontf;
  29.  
  30. void GF_eoc(void)
  31. {
  32.     if(onechar==NULL) return;
  33.     fwrite(onechar,1,charsize,fontf); datapos+=charsize;
  34.     free(onechar); onechar=NULL;
  35. }
  36.  
  37. void GF_boc(int p)
  38. {
  39.     unsigned char cc;
  40.     int min_m, min_n, max_m, max_n, del_m, del_n;
  41.     if(!chswitch) return;
  42.     if(p==0) {
  43.         cc=texint(gfbuf+(++g),4); g+=8;
  44.         min_m=texint(gfbuf+g,4); g+=4;
  45.         max_m=texint(gfbuf+g,4); g+=4;
  46.         min_n=texint(gfbuf+g,4); g+=4;
  47.         max_n=texint(gfbuf+g,4); g+=4;
  48.         del_m=max_m-min_m; del_n=max_n-min_n;
  49.         g--;
  50.     }
  51.     else {
  52.         cc=gfbuf[++g];
  53.         del_m=gfbuf[++g]; max_m=gfbuf[++g];
  54.         del_n=gfbuf[++g]; max_n=gfbuf[++g];
  55.         min_m=max_m-del_m; min_n=max_n-del_n;
  56.     }
  57.     if(cc>tfm.ec || cc<tfm.bc) return;
  58.     charpos=cc-tfm.bc;
  59.     if(del_m<0) del_m=0; if(del_n<0) del_n=0;
  60.     if(del_m>=MAX_FONT_X-1) del_m=MAX_FONT_X-2;
  61.     if(del_n>=MAX_FONT_Y-1) del_n=MAX_FONT_Y-2;
  62.     x=y=0; xmax=del_m+1; ymax=del_n+1;
  63.     fh[charpos].xstart=min_m; fh[charpos].ystart=-max_n;
  64.     fh[charpos].xmax=xmax; fh[charpos].ymax=ymax;
  65.     brush=0; thischar=cc;
  66.     xsize=(xmax+7)/8; charsize=xsize*ymax;
  67.     onechar=xmalloc(charsize+1024);
  68.     memset(onechar,0,charsize+1024);
  69.     fh[charpos].start=datapos;
  70.     fh[charpos].w=tfm.f[cc].w;
  71. }
  72.  
  73. void GF_paint(int p)
  74. {
  75.     int i;
  76.     if(onechar==NULL) return;
  77.     if(brush) for(i=x;i<p+x && i<xmax;i++) {
  78.         onechar[y*xsize+(i>>3)]|=(1<<(i&7));
  79.     }
  80.     x+=p; if(x>xmax) x=xmax;
  81.     brush^=1;
  82. }
  83.  
  84. void GF_new_row(int p)
  85. {
  86.     y++; if(y>ymax) y=ymax;
  87.     x=p; if(x>xmax) x=xmax;
  88.     brush=1;
  89. }
  90.  
  91. void GF_skip(int p)
  92. {
  93.     if(p>0) p=texint(gfbuf+(++g),p);
  94.     p++; y+=p; if(y>ymax) y=ymax;
  95.     x=0; brush=0;
  96. }
  97.  
  98. void GF_xxx(int p)
  99. {
  100.     unsigned int t;
  101.     t=texint(gfbuf+(++g),p);
  102.     g+=p+t-1;
  103. }
  104.  
  105. void GF_yyy(void)
  106. {
  107.     g+=4;
  108. }
  109.  
  110. void GF_char_loc(int p)
  111. {
  112.     if(p==0) g+=1+1+4+4;
  113.     else g+=1+4+4+4+4;
  114. }
  115.  
  116. void GF_post(void)
  117. {
  118.     chswitch=0;
  119. }
  120.  
  121. void GF_post_post(void)
  122. {
  123.     g=gfbuflen; chswitch=0;
  124. }
  125.  
  126. #include "gfcmd.c"
  127.  
  128. void loadgf(char *fname, int density)
  129. {
  130.     int len;
  131.     char namebuf[128];
  132.    
  133.     snprintf(namebuf,sizeof(namebuf),"%s/texgf.%dgf",tmpdir,density);
  134.     len=getfile(namebuf,&gfbuf);
  135.     if(len<=0) {
  136.         error("Metafont failed.");
  137.     }
  138.     gfbuflen=len;
  139. }
  140.  
  141. void makegf(char *fontname, int density)
  142. {
  143.     call_sh("mkdir -p %s\n\
  144. cd %s\n\
  145. rm -f texgf.* 2>/dev/null\n\
  146. cat >texgf.mf <<@\n\
  147. batchmode;\n\
  148. mode_def texgf =\n\
  149.         mode_param (pixels_per_inch, %d);\n\
  150.         mode_param (blacker, %f);\n\
  151.         mode_param (fillin, 0);\n\
  152.         mode_param (o_correction, 0);\n\
  153.         mode_common_setup_;\n\
  154. enddef;\n\
  155. mode = texgf;\n\
  156. input %s;\n\
  157. @\n\
  158. mf texgf </dev/null || mf-nowin texgf </dev/null\n\
  159. ", fontdir, tmpdir, density, pow((double)density/100,0.75)*blacker, fontname);
  160. }
  161.  
  162. void gf2font(char *fontname,int density)
  163. {
  164.     unsigned char cc;
  165.     char namebuf[1024];
  166.     char tmpname[1024];
  167.    
  168.     if((gfbuf[0]&255)!=gf_pre || (gfbuf[1]&255)!=131) return;
  169.     g=3+(gfbuf[2]&255);
  170.     if(gfbuflen<=g) return;
  171.     if(tfm.ec==0 && tfm.bc==0) return;
  172.     charcnt=tfm.ec-tfm.bc+1;
  173.     fh=xmalloc(charcnt*sizeof(FONTHEADER)+256);
  174.     memset(fh,0,charcnt*sizeof(FONTHEADER));
  175.     snprintf(tmpname,sizeof(tmpname),"%s/wims.fonttmp",tmpdir);
  176.     fontf=fopen(tmpname,"w"); if(fontf==NULL) return;
  177.     brush=0; x=y=xmax=ymax=datapos=0; onechar=NULL; chswitch=1;
  178.     for(;g<gfbuflen;g++) {
  179.         cc=gfbuf[g];
  180.         if(cc<=63) {GF_paint(cc); continue;}
  181.         if(cc>=74 && cc<=238) {GF_new_row(cc-74); continue;}
  182.         switch(cc) {
  183.             case gf_boc:        GF_boc(0); break;
  184.             case gf_boc1:       GF_boc(1); break;
  185.             case gf_eoc:        GF_eoc(); break;
  186.             case gf_skip0:      GF_skip(0); break;
  187.             case gf_skip1:      GF_skip(1); break;
  188.             case gf_skip2:      GF_skip(2); break;
  189.             case gf_skip3:      GF_skip(3); break;
  190.             case gf_char_loc:   GF_char_loc(1); break;
  191.             case gf_char_loc0:  GF_char_loc(0); break;
  192.             case gf_xxx1:       GF_xxx(1); break;
  193.             case gf_xxx2:       GF_xxx(2); break;
  194.             case gf_xxx3:       GF_xxx(3); break;
  195.             case gf_xxx4:       GF_xxx(4); break;
  196.             case gf_yyy:        GF_yyy(); break;
  197.            
  198.             default: break;
  199.         }
  200.     }
  201.     fclose(fontf);
  202.     snprintf(namebuf,sizeof(namebuf),"%s/%s.font",
  203.              tmpdir,fontname);
  204.     fontf=fopen(namebuf,"w"); if(fontf!=NULL) {
  205.         fwrite(&(tfm.checksum),sizeof(int),1,fontf);
  206.         fwrite(&(tfm.designsize),sizeof(int),1,fontf);
  207.         fwrite(&(tfm.bc),sizeof(int),1,fontf);
  208.         fwrite(&(tfm.ec),sizeof(int),1,fontf);
  209.         fwrite(fh,sizeof(FONTHEADER),charcnt,fontf);
  210.         fclose(fontf);
  211.         call_sh("cat %s >>%s; mkdir -p %s/%d; mv -f %s %s/%d",
  212.                 tmpname,namebuf,fontdir,density,namebuf,fontdir,density);
  213.         unlink(tmpname);
  214.     }
  215.     free(fh);
  216. }
  217.  
  218.