The R Project SVN R

/*
 *  R : A Computer Language for Statistical Data Analysis
  *  Copyright (C) 2001 The R Development Core Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <Defn.h>
#include <Rdynpriv.h>
#include <Rgraphics.h>

typedef struct {
    GVTextRoutine GVText;
    GVStrWidthRoutine GVStrWidth;
    GVStrHeightRoutine GVStrHeight;
} VfontRoutines;

static VfontRoutines routines, *ptr = &routines;

/*
static double (*ptr_GVStrWidth)(const unsigned char *s, int typeface, 
                int fontindex,
                int unit, DevDesc *dd);
static double (*ptr_GVStrHeight)(const unsigned char *s, int typeface, 
                 int fontindex,
                 int unit, DevDesc *dd);
static void (*ptr_GVText)(double x, double y, int unit, char *s, 
              int typeface, int fontindex,
              double x_justify, double y_justify, double rotation,
              DevDesc *dd);
*/

static int initialized = 0;

void
R_setVFontRoutines(GVStrWidthRoutine vwidth, GVStrHeightRoutine vheight, GVTextRoutine vtext)
{
    ptr->GVStrWidth = vwidth;
    ptr->GVStrHeight = vheight;
    ptr->GVText = vtext;
}

static void vfonts_Init(void)
{
    int res = moduleCdynload("vfonts", 1, 1);
    initialized = -1;
    if(!res) return;
    initialized = 1;    
    return;
}

double GVStrWidth (const unsigned char *s, int typeface, int fontindex,
           int unit, DevDesc *dd)
{
    if(!initialized) vfonts_Init();
    if(initialized > 0)
    return (*ptr->GVStrWidth)(s, typeface, fontindex, unit, dd);
    else {
    error("Hershey fonts cannot be loaded");
    return 0.0;
    }
}

double GVStrHeight (const unsigned char *s, int typeface, int fontindex,
            int unit, DevDesc *dd)
{
    if(!initialized) vfonts_Init();
    if(initialized > 0)
    return (*ptr->GVStrHeight)(s, typeface, fontindex, unit, dd);
    else {
    error("Hershey fonts cannot be loaded");
    return 0.0;
    }
}

void GVText (double x, double y, int unit, char *s, 
         int typeface, int fontindex,
         double x_justify, double y_justify, double rotation,
         DevDesc *dd)
{
    if(!initialized) vfonts_Init();
    if(initialized > 0)
    (*ptr->GVText)(x, y, unit, s, typeface, fontindex, 
              x_justify, y_justify, rotation, dd);
    else
    error("Hershey fonts cannot be loaded");
}