sys/src/libmemdraw/string.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <draw.h>
   4 #include <memdraw.h>
   5 #include <memlayer.h>
   6
   7 Point
   8 memimagestring(Memimage *b, Point p, Memimage *color, Point cp, Memsubfont *f, char *cs)
   9 {
  10         int w, width;
  11         uchar *s;
  12         Rune c;
  13         Fontchar *i;
  14
  15         s = (uchar*)cs;
  16         for(; c=*s; p.x+=width, cp.x+=width){
  17                 width = 0;
  18                 if(c < Runeself)
  19                         s++;
  20                 else{
  21                         w = chartorune(&c, (char*)s);
  22                         if(w == 0){
  23                                 s++;
  24                                 continue;
  25                         }
  26                         s += w;
  27                 }
  28                 if(c >= f->n)
  29                         continue;
  30                 i = f->info+c;
  31                 width = i->width;
  32                 memdraw(b, Rect(p.x+i->left, p.y+i->top, p.x+i->left+(i[1].x-i[0].x), p.y+i->bottom),
  33                         color, cp, f->bits, Pt(i->x, i->top), SoverD);
  34         }
  35         return p;
  36 }
  37
  38 Point
  39 memsubfontwidth(Memsubfont *f, char *cs)
  40 {
  41         Rune c;
  42         Point p;
  43         uchar *s;
  44         Fontchar *i;
  45         int w, width;
  46
  47         p = Pt(0, f->height);
  48         s = (uchar*)cs;
  49         for(; c=*s; p.x+=width){
  50                 width = 0;
  51                 if(c < Runeself)
  52                         s++;
  53                 else{
  54                         w = chartorune(&c, (char*)s);
  55                         if(w == 0){
  56                                 s++;
  57                                 continue;
  58                         }
  59                         s += w;
  60                 }
  61                 if(c >= f->n)
  62                         continue;
  63                 i = f->info+c;
  64                 width = i->width;
  65         }
  66         return p;
  67 }