IABSD.fr/xenocara/lib/libX11/modules/om/generic/omTextExt.c

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• Author : matthieu
  Date : 2006-11-25 16:33:55
  Hash : 8ef0df6a
  Message : import from X.Org 7.2RC2

• lib/libX11/modules/om/generic/omTextExt.c

• /* $Xorg: omTextExt.c,v 1.3 2000/08/17 19:45:22 cpqbld Exp $ */
  /*
   * Copyright 1992, 1993 by TOSHIBA Corp.
   *
   * Permission to use, copy, modify, and distribute this software and its
   * documentation for any purpose and without fee is hereby granted, provided
   * that the above copyright notice appear in all copies and that both that
   * copyright notice and this permission notice appear in supporting
   * documentation, and that the name of TOSHIBA not be used in advertising
   * or publicity pertaining to distribution of the software without specific,
   * written prior permission. TOSHIBA make no representations about the
   * suitability of this software for any purpose.  It is provided "as is"
   * without express or implied warranty.
   *
   * TOSHIBA DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
   * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
   * TOSHIBA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
   * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
   * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
   * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
   * SOFTWARE.
   *
   * Author: Katsuhisa Yano	TOSHIBA Corp.
   *			   	mopi@osa.ilab.toshiba.co.jp
   */
  /* $XFree86: xc/lib/X11/omTextExt.c,v 1.5 2003/04/13 19:22:22 dawes Exp $ */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include "Xlibint.h"
  #include "XomGeneric.h"
  #include <stdio.h>
  
  int
  _XomGenericTextExtents(
      XOC oc,
      XOMTextType type,
      XPointer text,
      int length,
      XRectangle *overall_ink,
      XRectangle *overall_logical)
  {
      XlcConv conv;
      XFontStruct *font;
      Bool is_xchar2b;
      XPointer args[2];
      XChar2b xchar2b_buf[BUFSIZ], *buf;
      int direction, logical_ascent, logical_descent, tmp_ascent, tmp_descent;
      XCharStruct overall, tmp_overall;
      int buf_len, left;
      Bool first = True;
  
      conv = _XomInitConverter(oc, type);
      if (conv == NULL)
  	return 0;
  
      bzero((char *) &overall, sizeof(XCharStruct));
      logical_ascent = logical_descent = 0;
  
      args[0] = (XPointer) &font;
      args[1] = (XPointer) &is_xchar2b;
  
      while (length > 0) {
  	buf = xchar2b_buf;
  	left = buf_len = BUFSIZ;
  
  	if (_XomConvert(oc, conv, (XPointer *) &text, &length,
  			(XPointer *) &buf, &left, args, 2) < 0)
  	    break;
  	buf_len -= left;
  
  	if (is_xchar2b)
  	    XTextExtents16(font, xchar2b_buf, buf_len, &direction,
  			   &tmp_ascent, &tmp_descent, &tmp_overall);
  	else
  	    XTextExtents(font, (char *) xchar2b_buf, buf_len, &direction,
  			 &tmp_ascent, &tmp_descent, &tmp_overall);
  
  	if (first) {	/* initialize overall */
  	    overall = tmp_overall;
  	    logical_ascent = tmp_ascent;
  	    logical_descent = tmp_descent;
  	    first = False;
  	} else {
  	    overall.lbearing = min(overall.lbearing,
  				   overall.width + tmp_overall.lbearing);
  	    overall.rbearing = max(overall.rbearing,
  				   overall.width + tmp_overall.rbearing);
  	    overall.ascent = max(overall.ascent, tmp_overall.ascent);
  	    overall.descent = max(overall.descent, tmp_overall.descent);
  	    overall.width += tmp_overall.width;
  	    logical_ascent = max(logical_ascent, tmp_ascent);
  	    logical_descent = max(logical_descent, tmp_descent);
  	}
      }
  
      if (overall_ink) {
  	overall_ink->x = overall.lbearing;
  	overall_ink->y = -(overall.ascent);
  	overall_ink->width = overall.rbearing - overall.lbearing;
  	overall_ink->height = overall.ascent + overall.descent;
      }
  
      if (overall_logical) {
  	overall_logical->x = 0;
          overall_logical->y = -(logical_ascent);
  	overall_logical->width = overall.width;
          overall_logical->height = logical_ascent + logical_descent;
      }
  
      return overall.width;
  }
  
  int
  _XmbGenericTextExtents(XOC oc, _Xconst char *text, int length,
  		       XRectangle *overall_ink, XRectangle *overall_logical)
  {
      return _XomGenericTextExtents(oc, XOMMultiByte, (XPointer) text, length,
  				  overall_ink, overall_logical);
  }
  
  int
  _XwcGenericTextExtents(XOC oc, _Xconst wchar_t *text, int length,
  		       XRectangle *overall_ink, XRectangle *overall_logical)
  {
      return _XomGenericTextExtents(oc, XOMWideChar, (XPointer) text, length,
  				  overall_ink, overall_logical);
  }
  
  int
  _Xutf8GenericTextExtents(XOC oc, _Xconst char *text, int length,
  			 XRectangle *overall_ink, XRectangle *overall_logical)
  {
      return _XomGenericTextExtents(oc, XOMUtf8String, (XPointer) text, length,
  				  overall_ink, overall_logical);
  }