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Viewing changes to contrib/paul.fmt_page.c

  • Committer: Bazaar Package Importer
  • Author(s): Thomas Schoepf
  • Date: 2002-03-17 15:09:36 UTC
  • Revision ID: james.westby@ubuntu.com-20020317150936-yglzziwcc0luz55k
Tags: upstream-1.6.0
Import upstream version 1.6.0

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contrib/paul.fmt_page.c
 
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static void
 
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fmt_page(struct export *e, struct fmt_page *pg, struct vt_page *vtp)
 
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{
 
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    char buf[16];
 
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    int x, y;
 
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    u8 c, *p = vtp->data[0];
 
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    pg->dbl = 0;
 
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    sprintf(buf, "\2%3x.%02x\7", vtp->pgno, vtp->subno & 0xff);
 
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    strncpy(p,buf,8);
 
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    for (y = 0; y < H; y++)
 
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    {
 
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      /* two variables for each attribute 
 
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       * new_attr  -- information got from the latest char
 
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       * here_attr -- value of the attribute for this xy position
 
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       * So, if the attribute char is "Set-At" 
 
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       *        then  
 
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       *            {
 
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       *              here_attr=new_attr=attribute(latest_char);
 
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       *              ... processing ... (use here_attr !!!)
 
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       *              here_attr=new_attr; // <-- unneeded, 
 
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       *                                  // but doesn't break the code
 
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       *            }
 
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       *        else   // Set-After 
 
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       *            {
 
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       *              new_attr=attribute(latest_char);
 
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       *              ... processing ... (use here_attr !!!)
 
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       *              here_attr=new_attr;
 
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       *            }
 
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       * Attributes persist until changed by another attribute
 
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       *   or end of row
 
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       */
 
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      u8 held_mosaic_char=' ';
 
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      u8 dbl=0; /* set to 1 for double height page 
 
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                  * (is used at the end of row processing) */
 
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      u8 new_gfx=0, here_gfx=0; // Start-of-row default condition
 
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      u8 new_bg=0, here_bg=0;   // Start-of-row default condition
 
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      u8 new_fg=7, here_fg=7;   // Start-of-row default condition
 
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      u8 new_bln=0, here_bln=0;   // Start-of-row default condition
 
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      u8 new_dbl=0, here_dbl=0;   // Start-of-row default condition
 
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      u8 new_con=0, here_con=0;   // Start-of-row default condition
 
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      u8 here_sep=0;  /*  Start-of-row default condition
 
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                        *  set/reset by 0x19,0x1a chars
 
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                        *  Both (0x19,0x1a) are Set-At
 
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                        *  so anyway (here_sep==new_sep) all the time
 
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                        */
 
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      u8 new_hld=0, here_hld=0;  
 
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      //hold attribute:
 
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      u8 held_sep=0;
 
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      for (x = 0; x < W; ++x)
 
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        {
 
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          pg->data[y][x].ch=' ';  // case 0x00 ... 0x1f
 
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          switch (c=*p++)
 
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            {
 
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            case 0x00 ... 0x07:      
 
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              //Alpha Colour Codes (foreground)
 
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              //Set-After
 
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              new_gfx=0;
 
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              new_fg=c;  // in this case (c == (c & 0x07))
 
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              new_con=0;
 
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              break;
 
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            case 0x08:
 
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              //Flash
 
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              //Set-After
 
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              new_bln=EA_BLINK;
 
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              break;
 
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            case 0x09:
 
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              //Steady
 
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              //Set-At
 
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              new_bln=here_bln=0;
 
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              break;
 
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            case 0x0a:
 
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              //End Box
 
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              //Set-After
 
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              //!!! not processed
 
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              break;
 
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            case 0x0b:
 
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              //Start Box  (used with End Box to mark visible 
 
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              //            part of page on transparent ones
 
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              //            eg. newsflash or subtitle )
 
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              //Set-After
 
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              //!!! not processed
 
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              break;
 
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            case 0x0c:
 
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              //Normal Size
 
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              //Set-At
 
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              new_dbl=here_dbl=0;
 
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              break;
 
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            case 0x0d:
 
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              //Double Height
 
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              //Set-After
 
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              dbl=1;
 
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              new_dbl=EA_DOUBLE;
 
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              break;
 
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            case 0x0e:
 
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              //Double Width (for Presentation Level 2.5 and 3.5)
 
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              //Set-After
 
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              //!!! not processed
 
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              break;
 
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            case 0x0f:
 
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              //Double Size (for Presentation Level 2.5 and 3.5)
 
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              //Set-After
 
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              //!!! not processed
 
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              break;
 
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            case 0x10 ... 0x17:
 
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              //Mosaic Colour Codes
 
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              //Set-After
 
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              new_gfx=EA_GRAPHIC;
 
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              new_fg= c & 0x07;
 
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              new_con=0;
 
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              break;
 
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            case 0x18:
 
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              //Conceal
 
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              //Set-At
 
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              here_con=new_con=EA_CONCEALED;
 
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              break;
 
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            case 0x19:
 
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              //Contiguous Mosaic Graphics
 
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              //Set-At
 
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              here_sep=0;
 
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              break;
 
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            case 0x1a:
 
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              //Separated Mosaic Graphics
 
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              //Set-At
 
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              here_sep=EA_SEPARATED;
 
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              break;
 
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            case 0x1b:
 
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              //ESC (or Switch) 
 
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              //Set-After
 
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              //!!! not processed
 
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              break;
 
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            case 0x1c:
 
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              //Black Background
 
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              //Set-At
 
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              here_bg=new_bg=0;
 
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              break;
 
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            case 0x1d:
 
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              //New Background
 
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              //Set-At
 
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              here_bg=new_bg=here_fg;
 
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              break;
 
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            case 0x1e:
 
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              //Hold Mosaics
 
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              //Set-At
 
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              here_hld=new_hld=1;
 
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              break;
 
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            case 0x1f:
 
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              //Release Mosaics
 
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              //Set-After
 
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              new_hld=0;
 
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              break;
 
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          // start of "... processing ..."
 
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            default: //noncontrol characters 
 
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              pg->data[y][x].ch=c;
 
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              /* **************************** */
 
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              /* special treating of sep
 
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               * when in Hold-Mosaics mode 
 
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               * see the specs for details...
 
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               */
 
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              if (c & (1<<5))  //why "6" bit set is (1<<5) ????????
 
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                {
 
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                  held_mosaic_char=c;
 
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                  held_sep=here_sep;
 
168
                }
 
169
              if (here_hld) //when in "hold" set 'here_sep' here:
 
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                pg->data[y][x].attr|=here_sep;
 
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              /* **************************** */
 
172
            } //end of switch
 
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          if (here_hld)  c=held_mosaic_char;
 
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          if ((here_gfx) && ((c & 0xa0) == 0x20))
 
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            pg->data[y][x].ch= c + ((c & 0x40) ? 32 : -32);
 
178
          
 
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          if ((here_con) && (not e->reveal))
 
180
            pg->data[y][x].ch=' ';        
 
181
          
 
182
          pg->data[y][x].fg=here_fg;
 
183
          pg->data[y][x].bg=here_bg;
 
184
          
 
185
          if (here_hld) // special treating again...
 
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            pg->data[y][x].attr=(here_dbl|here_gfx|
 
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                                 here_bln|here_con);
 
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          else  // when not in "hold" set 'here_sep' here
 
189
            pg->data[y][x].attr=(here_dbl|here_gfx|
 
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                                 here_bln|here_con|here_sep);
 
191
          
 
192
          // end of "... processing ..."
 
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          here_gfx=new_gfx;
 
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          here_fg=new_fg;
 
195
          here_bg=new_bg;
 
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          here_bln=new_bln;
 
197
          here_dbl=new_dbl;
 
198
          here_con=new_con;
 
199
          here_hld=new_hld;
 
200
        }
 
201
      if (dbl)
 
202
        {
 
203
          pg->dbl |= 1 << y;
 
204
          for (x = 0; x < W; ++x)
 
205
            {
 
206
              if (~pg->data[y][x].attr & EA_DOUBLE)
 
207
                pg->data[y][x].attr |= EA_HDOUBLE;
 
208
              pg->data[y+1][x] = pg->data[y][x];
 
209
              pg->data[y+1][x].ch = ' ';
 
210
            }
 
211
          y++;p+=40;
 
212
        }
 
213
    }
 
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}