Source code

/*
 * OpenGLText.h 
 * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


#pragma once

#include <viz++/String.h> //2015/07/23

#include <viz++/opengl/OpenGLObject.h>
#include <viz++/opengl/OpenGLFont.h>

namespace VIZ {

class OpenGLText :public OpenGLObject {
private:
  String string;  

public:
  OpenGLText(const char* text)
  :string("")
  {
    if (text) {
      string = text;
    }
  }

  void draw(void* font = GLUT_STROKE_ROMAN)
  {
    draw(font, (const char*)string);
  }

public:
  void draw(void* font, const char* string)
  {
    if (string && font) {
      size_t len = strlen(string);
      if (isStrokeFont(font)) {
        for (size_t i = 0; i<len; i++) {
          glutStrokeCharacter(font, string[i]);
        }
      } else if (isBitmapFont(font)) {
        for (size_t i = 0; i<len; i++) {
          glutBitmapCharacter(font, string[i]);
        }
      } else {
        throw IException("Invalid font");
      }
    }
  }
  
  bool isStrokeFont(void* font)
  {
     void* fonts[] = {
       GLUT_STROKE_ROMAN,
       GLUT_STROKE_MONO_ROMAN,
     };
     bool rc = false;
     for (int i = 0; i<CountOf(fonts); i++) {
       if (font == fonts[i]) {
         rc = true;
         break;
       }
     }
    return rc;
  }

  bool isBitmapFont(void* font)
  {
     void* fonts[] = {
       GLUT_BITMAP_9_BY_15,
       GLUT_BITMAP_8_BY_13,
       GLUT_BITMAP_TIMES_ROMAN_10,
       GLUT_BITMAP_TIMES_ROMAN_24,
       GLUT_BITMAP_HELVETICA_10,
       GLUT_BITMAP_HELVETICA_12,
       GLUT_BITMAP_HELVETICA_18,
     };
     bool rc = false;
     for (int i = 0; i<CountOf(fonts); i++) {
       if (font == fonts[i]) {
         rc = true;
         break;
       }
     }
    return rc;
  }
};

}