gsd_fonts.c

Go to the documentation of this file.

/*!
   \file lib/ogsf/gsd_fonts.c
 
   \brief OGSF library - loading and manipulating surfaces
 
   GRASS OpenGL gsurf OGSF Library
 
   \todo This file needs to be re-written in OpenGL
 
   (C) 1999-2008 by the GRASS Development Team
 
   This program is free software under the
   GNU General Public License (>=v2).
   Read the file COPYING that comes with GRASS
   for details.
 
   \author Bill Brown USACERL, GMSL/University of Illinois
   \author Doxygenized by Martin Landa <landa.martin gmail.com> (May 2008)
 */
 
#include <string.h>
#include <assert.h>
 
#include <grass/ogsf.h>
 
#include "rgbpack.h"
 
/*!
   \brief Get text width
 
   \param s text string
   \param size size
 
   \return text width
 */
int gsd_get_txtwidth(const char *s, int size)
{
    int width, len;
 
    len = strlen(s);
    width = (size * len) / 2;
 
    return (width);
}
 
/*!
   \brief Get text  height
 
   \param size size
 
   \return text height
 */
int gsd_get_txtheight(int size)
{
    unsigned long height;
 
    height = size / 2;
 
    return (height);
}
 
/*!
   \brief Get text descender
 
   yorig ??
 
   Is this defined somewhere ?
 
   \return 2
 */
int get_txtdescender(void)
{
    return (2);
}
 
/*!
   \brief Get text offset
 
   xorig ??
 
   Is this defined somewhere ?
 
   \return 0
 */
int get_txtxoffset(void)
{
    return (0);
}
 
/*!
   \brief Display label
 
   \param fontbase font-base
   \param lab_pos label position
   \param txt text string
 */
void do_label_display(GLuint fontbase, float *lab_pos, const char *txt)
{
    glRasterPos2f(lab_pos[X], lab_pos[Y]);
    glListBase(fontbase);
    glCallLists(strlen(txt), GL_UNSIGNED_BYTE, (const GLvoid *)txt);
 
    return;
}