/*
 * (c) Copyright 1993, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED 
 * Permission to use, copy, modify, and distribute this software for 
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that 
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. 
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * US Government Users Restricted Rights 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
 */
/*
 *  xfont.c
 *  Draws some text in a bitmapped font.  Uses glBitmap() 
 *  and other pixel routines.  Also demonstrates use of 
 *  display lists.
 */
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glx.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <GL/glaux.h>

GLuint base;

void makeRasterFont(void)
{
  XFontStruct *fontInfo;
  Font id;
  unsigned int first, last;
  Display *xdisplay;

  xdisplay = auxXDisplay();
  fontInfo = XLoadQueryFont(xdisplay,
	   "-adobe-helvetica-medium-r-normal--17-120-100-100-p-88-iso8859-1");
  if (fontInfo == NULL) {
    printf("no font found\n");
    exit(0);
  }

  id = fontInfo->fid;
  first = fontInfo->min_char_or_byte2;
  last = fontInfo->max_char_or_byte2;

  base = glGenLists((GLuint) last + 1);
  if (base == 0) {
    printf("out of display lists\n");
    exit(0);
  }
  glXUseXFont(id, first, last - first + 1, base + first);
/*
 * *height = fontInfo->ascent + fontInfo->descent;
 * *width = fontInfo->max_bounds.width;  
 */
}

void printString(char *s)
{
  glPushAttrib(GL_LIST_BIT);
  glListBase(base);
  glCallLists(strlen(s), GL_UNSIGNED_BYTE, (GLubyte *) s);
  glPopAttrib();
}

void myinit(void)
{
  makeRasterFont();
  glShadeModel(GL_FLAT);
}

void display(void)
{
  GLfloat white[3] =
  {1.0, 1.0, 1.0};
  int i, j;
  char teststring[33];

  glClear(GL_COLOR_BUFFER_BIT);
  glColor3fv(white);
  for (i = 32; i < 127; i += 32) {
    glRasterPos2i(20, 200 - 18 * (GLint) i / 32);
    for (j = 0; j < 32; j++)
      teststring[j] = (char)(i + j);
    teststring[32] = 0;
    printString(teststring);
  }
  glRasterPos2i(20, 100);
  printString("The quick brown fox jumps");
  glRasterPos2i(20, 82);
  printString("over a lazy dog.");
  glFlush();
}

void myReshape(int w, int h)
{
  glViewport(0, 0, w, h);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  glOrtho(0.0, (GLfloat) w, 0.0, (GLfloat) h, -1.0, 1.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
}

/*
 * Main Loop
 * *  Open window with initial window size, title bar, 
 * *  RGBA display mode, and handle input events.
 */
int main(int argc, char **argv)
{
  auxInitDisplayMode(AUX_SINGLE | AUX_RGB);
  auxInitPosition(0, 0, 500, 500);
  if (!auxInitWindow(argv[0]))
    auxQuit();
  auxReshapeFunc(myReshape);
  myinit();
  auxMainLoop(display);
  return 0;
}