1: /* Copyright 1985, Massachusetts Institute of Technology */
   2: 
   3: /* textutil.c	text related utility routines.
   4:  *
   5:  *	CopyText	Copy text to bitmap
   6:  *	TextWidth	Returns width of a piece of text in a font
   7:  *	CharWidth	Returns width of a character in a font
   8:  *
   9:  */
  10: 
  11: #include "ddxqvss.h"
  12: #include "vstagbl.h"
  13: 
  14: CopyText (string, strlen, font, bm)
  15:     register char *string;
  16:     register int strlen;
  17:     FONT *font;
  18:     register BITMAP *bm;
  19: {
  20: 
  21:     int dstx,srcx,w,h;
  22:     FontPriv *pfont;
  23:     BITMAP *fbm;
  24: 
  25:     pfont = FDATA(font);
  26:     fbm = pfont->strike;
  27: 
  28:     dstx = 0;
  29:     h = font->height;
  30: 
  31:     while (strlen--)
  32:         {
  33: 
  34:         /* SET THE WIDTH OF THE CHARACTER */
  35: 
  36:         w = pfont->widths[*string];
  37:         srcx = pfont->leftarray[*string++];
  38: 
  39:         /* CALL THE COPY BITMAP PROCEDURE TO COPY THE CHARACTER
  40: 		   FROM THE FONT BITMAP TO THE DESTINATION BITMAP */
  41: 
  42:         copyrmsk(VSTA$K_SRC_BITMAP, (short *)fbm->data, fbm->width,
  43:              fbm->height, srcx, 0, w, h,
  44:              (short *)bm->data, bm->width, bm->height, dstx, 0,
  45:              VSTA$K_MAP_SRC, 0, 0);
  46: 
  47:         /* ADD THE WIDTH OF THE CHARACTER TO THE DST OFFSET */
  48: 
  49:         dstx += w;
  50: 
  51:         };
  52: }
  53: 
  54: /* Returns the width of a string in a font */
  55: 
  56: int TextWidth (string, strlen, spacepad, font)
  57:     register char *string;
  58:     register int strlen;
  59:     int spacepad;
  60:     register FONT *font;
  61: {
  62:     register unsigned int c;
  63:     register short *widths;
  64:     int width = 0;
  65: 
  66:     if (font->fixed) {
  67:         width = strlen * font->avg_width;
  68:         if (spacepad) {
  69:         while (--strlen >= 0)
  70:             if (*string++ == font->space)
  71:                 width += spacepad;
  72:         }
  73:     } else {
  74:         widths = FDATA(font)->widths;
  75:         while (--strlen >= 0) {
  76:         c = *string++;
  77:         if (c >= font->first && c <= font->last) {
  78:             if (c == font->space)
  79:                 width += spacepad;
  80:             width += widths[c - font->first];
  81:         }
  82:         }
  83:     }
  84: 
  85:     return (width);
  86: }
  87: 
  88: /* Returns width of a character in a font. */
  89: 
  90: int CharWidth(c, font)
  91:     register unsigned int c;
  92:     register FONT *font;
  93: {
  94: 
  95:     if (c < font->first || c > font->last)
  96:         return (0);
  97:     else if (font->fixed)
  98:         return (font->avg_width);
  99:     else
 100:         return (FDATA(font)->widths[c - font->first]);
 101: }

Defined functions

CharWidth defined in line 90; never used
CopyText defined in line 14; used 1 times
TextWidth defined in line 56; never used
Last modified: 1986-01-28
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