/*# proc: process_t_corner_slice - erases a portion of a slice for either a top-left# proc:                          or top-right corner of line data based on a specifed# proc:                          cut slope.# proc: process_b_corner_slice - erases a portion of a slice for either a bottom-left# proc:                          or bottom-right corner of line data based on a specifed# proc:                          cut slope.*/#include <stdio.h>#include <defs.h>#include <rmline.h>/***************************************************************************//* process_t_corner_slice - erases a portion of a slice for either a top-  *//* left or top-right corner by computing a new bottom y coordinate for the *//* slice according to a specified cut slope. The routine does not erase    *//* any pixels (and returns FALSE) if certain stopping conditions are met.  *//***************************************************************************/process_t_corner_slice(cx, m, x, y,                       rs, re, slimit, ebin, sw, fsy, tsy, nsw, cdata, w, h)int cx, x, y;float m;int rs, re, slimit, *ebin, *sw, *fsy, *tsy, nsw;unsigned char *cdata;int w, h;{   int ntsy;   float compute_y();   /* compute the new y coordinate */   ntsy = min(h-1, max(0, sround(compute_y((float)cx, (float)m,                                           (float)x, (float)y))));   /* if the new slice width is too big */   /* OR the new y coordinate crosses over the top y coordinate ... */   if(((ntsy - fsy[cx] + 1) >= slimit) || (ntsy < fsy[cx])){      /* stop taking steps */      return(FALSE);   }   /* if the slice has not already been altered ... */   if(ebin[cx] == UNERASED){      tsy[cx] = ntsy;      /* erase the portion of the slice that is part of the line */      erase_slice_hori(ebin, sw, cx, fsy[cx], tsy[cx], cdata, w, h);   }   return(TRUE);}/***************************************************************************//* process_b_corner_slice - erases a portion of a slice for either a       *//* bottom-left or bottom-right corner by computing a new top y coordinate  *//* for the slice according to a specified cut slope. The routine does not  *//* erase any pixels (and returns FALSE) if certain stopping conditions are *//* met.                                                                    *//***************************************************************************/process_b_corner_slice(cx, m, x, y,                        rs, re, slimit, ebin, sw, fsy, tsy, nsw, cdata, w, h)int cx, x, y;float m;int rs, re, slimit, *ebin, *sw, *fsy, *tsy, nsw;unsigned char *cdata;int w, h;{   int nfsy;   float compute_y();   /* compute the new y coordinate */   nfsy = min(h-1, max(0, sround(compute_y((float)cx, (float)m,                                           (float)x, (float)y))));   /* if the new slice width is too big */   /* OR the new y coordinate crosses over the bottom y coordinate ... */   if(((tsy[cx] - nfsy + 1) >= slimit) || (tsy[cx] < nfsy)){      /* stop taking steps */      return(FALSE);   }   /* if the slice has not already been altered ... */   if(ebin[cx] == UNERASED){      fsy[cx] = nfsy;      /* erase the portion of the slice that is part of the line */      erase_slice_hori(ebin, sw, cx, fsy[cx], tsy[cx], cdata, w, h);   }   return(TRUE);}