kc3-lang/ftgl/msvc/demo.cpp

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• Hash : 0aff12c1
  Author :
  Date : 2008-04-24T13:40:12
  

  * Rename "win32_vcpp" to "msvc" and move all Visual Studio build files out of their subdirectory. * Add the msvc subdirectory to "make dist" so that it gets distributed.

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• msvc/demo.cpp

• // source changed by mrn@paus.ch/ max rheiner
  
  // original source: henryj@paradise.net.nz
  
  
  
  #include <iostream>
  
  #include <stdlib.h> // exit()
  
  
  
  #include <GL/glut.h>
  
  
  
  #include "FTGLOutlineFont.h"
  
  #include "FTGLPolygonFont.h"
  
  #include "FTGLBitmapFont.h"
  
  #include "FTGLTextureFont.h"
  
  #include "FTGLPixmapFont.h"
  
  
  
  static FTFont* fonts[5];
  
  static int width;
  
  static int height;
  
  
  
  
  
  // YOU'LL PROBABLY WANT TO CHANGE THESE
  
  #ifdef __linux__
  
  	#define DEFAULT_FONT "/usr/share/fonts/truetype/arial.ttf"
  
  #endif
  
  #ifdef __APPLE_CC__
  
  	#define DEFAULT_FONT "/Users/henry/Development/PROJECTS/FTGL/ftglcvs/FTGL/demo/arial.ttf"
  
  #endif
  
  #ifdef WIN32
  
  	#define DEFAULT_FONT "C:\\WINNT\\Fonts\\arial.ttf"
  	using namespace std;
  #endif
  
  
  
  
  
  void
  
  my_init( const char* font_filename )
  
  {
  
      glClearColor(0.0, 0.0, 0.0, 0.0);
  
      glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
  
  
  
      fonts[0] = new FTGLOutlineFont( font_filename );
  
      fonts[1] = new FTGLPolygonFont( font_filename );
  
      fonts[2] = new FTGLTextureFont( font_filename );
  
      fonts[3] = new FTGLBitmapFont( font_filename );
  
      fonts[4] = new FTGLPixmapFont( font_filename );
  
      for (int i=0; i< 5; i++) {
  
  		/*
          if (!fonts[i]->Open(font_filename)) {
  
              cerr << "ERROR: Unable to open file " << font_filename << "\n";
  
          }
  		
          else */
  		{
  
  			cout << "Reading font " << i << " from " << font_filename << endl;
  
  
  
              int point_size = 24;
  
              if (!fonts[i]->FaceSize(point_size)) {
  
                  cerr << "ERROR: Unable to set font face size " << point_size << "\n";
  
              }
  
          }
  
      }
  
  }
  
  
  
  static void
  
  do_ortho()
  
  {
  
    int w;
  
    int h;
  
    GLdouble size;
  
    GLdouble aspect;
  
  
  
    w = width;
  
    h = height;
  
    aspect = (GLdouble)w / (GLdouble)h;
  
  
  
    // Use the whole window.
  
    glViewport(0, 0, w, h);
  
  
  
    // We are going to do some 2-D orthographic drawing.
  
    glMatrixMode(GL_PROJECTION);
  
    glLoadIdentity();
  
    size = (GLdouble)((w >= h) ? w : h) / 2.0;
  
    if (w <= h) {
  
      aspect = (GLdouble)h/(GLdouble)w;
  
      glOrtho(-size, size, -size*aspect, size*aspect,
  
              -100000.0, 100000.0);
  
    }
  
    else {
  
      aspect = (GLdouble)w/(GLdouble)h;
  
      glOrtho(-size*aspect, size*aspect, -size, size,
  
              -100000.0, 100000.0);
  
    }
  
  
  
    // Make the world and window coordinates coincide so that 1.0 in
  
    // model space equals one pixel in window space.
  
    glScaled(aspect, aspect, 1.0);
  
  
  
     // Now determine where to draw things.
  
    glMatrixMode(GL_MODELVIEW);
  
    glLoadIdentity();
  
  }
  
  
  
  
  
  void
  
  my_reshape(int w, int h)
  
  {
  
    width = w;
  
    height = h;
  
  
  
    do_ortho( );
  
  }
  
  
  
  void
  
  my_handle_key(unsigned char key, int x, int y)
  
  {
  
     switch (key) {
  
  
  
  	   //!!ELLERS
  
     case 'q':   // Esc or 'q' Quits the program.
  
     case 27:    
  
  	   {
  
         for (int i=0; i<5; i++) {
  
             if (fonts[i]) {
  
                 delete fonts[i];
  
                 fonts[i] = 0;
  
             }
  
         }
  
        exit(1);
  
  	   }
  
        break;
  
  
  
     default:
  
        break;
  
     }
  
  }
  
  
  
  void
  
  draw_scene()
  
  {
  
     /* Set up some strings with the characters to draw. */
  
     unsigned int count = 0;
  
     char string[8][256];
  
     int i;
  
     for (i=1; i < 32; i++) { /* Skip zero - it's the null terminator! */
  
        string[0][count] = i;
  
        count++;
  
     }
  
     string[0][count] = '\0';
  
  
  
     count = 0;
  
     for (i=32; i < 64; i++) {
  
        string[1][count] = i;
  
        count++;
  
     }
  
     string[1][count] = '\0';
  
  
  
     count = 0;
  
     for (i=64; i < 96; i++) {
  
        string[2][count] = i;
  
        count++;
  
     }
  
     string[2][count] = '\0';
  
  
  
     count = 0;
  
     for (i=96; i < 128; i++) {
  
        string[3][count] = i;
  
        count++;
  
     }
  
     string[3][count] = '\0';
  
  
  
     count = 0;
  
     for (i=128; i < 160; i++) {
  
        string[4][count] = i;
  
        count++;
  
     }
  
     string[4][count] = '\0';
  
  
  
     count = 0;
  
     for (i=160; i < 192; i++) {
  
        string[5][count] = i;
  
        count++;
  
     }
  
     string[5][count] = '\0';
  
  
  
     count = 0;
  
     for (i=192; i < 224; i++) {
  
        string[6][count] = i;
  
        count++;
  
     }
  
     string[6][count] = '\0';
  
  
  
     count = 0;
  
     for (i=224; i < 256; i++) {
  
        string[7][count] = i;
  
        count++;
  
     }
  
     string[7][count] = '\0';
  
  
  
  
  
     glColor3f(1.0, 1.0, 1.0);
  
  
  
     for (int font = 0; font < 5; font++) {
  
         GLfloat x = -250.0;
  
         GLfloat y;
  
         GLfloat yild = 20.0;
  
         for (int j=0; j<4; j++) {
  
             y = 275.0-font*120.0-j*yild;
  
             if (font >= 3) {
  
                 glRasterPos2f(x, y);
  
                 fonts[font]->Render(string[j]);
  
             }
  
             else {
  
                 if (font == 2) {
  
                     glEnable(GL_TEXTURE_2D);
  
                     glEnable(GL_BLEND);
  
                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  
                 }
  
                 glPushMatrix(); {
  
                     glTranslatef(x, y, 0.0);
  
                     fonts[font]->Render(string[j]);
  
                 } glPopMatrix();
  
                 if (font == 2) {
  
                     glDisable(GL_TEXTURE_2D);
  
                     glDisable(GL_BLEND);
  
                 }
  
             }
  
         }
  
     }
  
  }
  
  
  
  
  
  void
  
  my_display(void)
  
  {
  
      glClear(GL_COLOR_BUFFER_BIT);
  
  
  
      draw_scene();
  
  
  
      glutSwapBuffers();
  
  }
  
  
  
  int 
  
  file_exists( const char * filename )
  
  {
  
  	FILE * fp = fopen( filename, "r" );
  
  
  
  	if ( fp == NULL )
  
  	{
  
  		// That fopen failed does _not_ definitely mean the file isn't there 
  
  		// but for now this is ok
  
  		return 0;
  
  	}
  
  	fclose( fp );
  
  	return 1;
  
  }
  
  
  
  void
  
  usage( const char * program )
  
  {
  
  	cerr << "Usage: " << program << " <filename.ttf>\n" << endl;
  
  }
  
  
  
  int
  
  main(int argc, char **argv)
  
  {
  
  	//!!ELLERS  -- cleaned up
  
  	char * filename;
  
  
  
  	glutInitWindowSize(600, 600);
  
  	glutInit(&argc, argv);
  
  	glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE);
  
  
  
  	glutCreateWindow("FTGL demo");
  
  
  
  	if ( argc >= 2 ) 
  
  	{
  
  		if ( !file_exists( argv[ 1 ] ))
  
  		{
  
  			usage( argv[ 0 ]);
  
  			cerr << "Couldn't open file '" << argv[ 1 ] << "'" << endl;
  
  			exit( -1 );
  
  		}
  
  		filename = argv[ 1 ];
  
  	}
  
  	else 
  
  	{
  
  		// try a default font
  
  		filename = DEFAULT_FONT;
  
  
  
  		if ( !file_exists( filename ))
  
  		{
  
  			usage( argv[ 0 ]);
  
  			cerr << "Couldn't open default file '" << filename << "'" << endl;
  
  			exit( -1 );
  
  		}
  
  	}
  
  
  
  	my_init( filename );
  
  
  
  	glutDisplayFunc(my_display);
  
  	glutReshapeFunc(my_reshape);
  
  	glutKeyboardFunc(my_handle_key);
  
  
  
  	glutMainLoop();
  
  	return 0;
  
  }
  
  
  
  

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