OpenGL 비트맵 폰트 예제

#include <GL/glut.h>

#include <stdlib.h>

#include <GL/glaux.h>

GLubyte rasters[24] = {

   0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00,

   0xff, 0x00, 0xff, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00,

   0xff, 0xc0, 0xff, 0xc0};

void init(void)

{

   glPixelStorei (GL_UNPACK_ALIGNMENT, 1);

   glClearColor (0.0, 0.0, 0.0, 0.0);

}

void display(void)

{

   glClear(GL_COLOR_BUFFER_BIT);

   glColor3f (1.0, 1.0, 1.0);

    //drawing F 3 times

   glRasterPos2i (20, 20);

   glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);

   glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);

   glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);

   glFlush();

}

void reshape(int w, int h)

{

   glViewport(0, 0, (GLsizei) w, (GLsizei) h);

   glMatrixMode(GL_PROJECTION);

   glLoadIdentity();

   glOrtho (0, w, 0, h, -1.0, 1.0);

   glMatrixMode(GL_MODELVIEW);

}

void keyboard(unsigned char key, int x, int y)

{

   switch (key) {

      case 27:

         exit(0);

   }

}

//Main Loop Open window with initial window size, title bar, RGBA display mode, and handle input events.

int main(int argc, char** argv)

{

   glutInit(&argc, argv);

   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

   glutInitWindowSize(100, 100);

   glutInitWindowPosition(100, 100);

   glutCreateWindow(argv[0]);

   init();

   glutReshapeFunc(reshape);

   glutKeyboardFunc(keyboard);

   glutDisplayFunc(display);

   glutMainLoop();

   return 0;

}