Bemerke: Das Bild muss hier eine Größe von 300 x 300 Pixeln haben, ansonsten müssen Anpassung beim malloc-Ruf gemacht werden - generell müssen dann viele '300's geändert werden.

ogl_test.cpp

/**
  * Original Code was GLUT-Test for proggen.org taken from here:
  * http://www.proggen.org/doku.php?id=frameworks:opengl:glut:test
  **/
 
#ifdef _WIN32
#include <windows.h>
#endif
 
#include <cstdio>
 
#ifdef __APPLE__ 
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#include <GL/gl.h>
#endif
 
struct rgb_data
{
    char red, green, blue;
};
 
struct rgb_data* data;
 
void display( void )
{
  /* clear all pixels */
  glClear( GL_COLOR_BUFFER_BIT );
 
  /* set the raster position to 0,0 */
  glRasterPos2f ( 0, 0 );
 
  /* Draws the pixeldata in data in the GL-Framebuffer */
  glDrawPixels (300, 300, GL_RGB, GL_UNSIGNED_BYTE, data);
 
  /* don't wait
   * start processing buffered OpenGL routines
   */
   glFlush();
}
 
void init(void )
{
  /* select clearing (background) color */
  glClearColor( 0.0, 0.0, 0.0, 0.0 );
 
  /* initialize viewing values */
  glMatrixMode( GL_PROJECTION );
  glLoadIdentity();
  glOrtho( 0.0, 1.0, 0.0, 1.0, -1.0, 1.0 );
}
 
int main(int argc, char* argv[])
{
  /* create a window with glut */
  glutInit( &argc, (char **) argv );
  glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB );
  glutInitWindowSize( 300, 300 );
  glutInitWindowPosition( 100, 100 );
  glutCreateWindow( "hello" );
 
  init();
 
  /* open a raw-image file (RGBRGBRGBRGB...) */
  FILE* f=fopen("image.raw", "rb");
 
  /* load the data into a struct containing char red, green, blu */
  data = (struct rgb_data*) malloc ( 300 * 300 * sizeof(struct rgb_data) );
  fread ( data, 300*300*3, 1, f);
 
  /* register the display-function with opengl */
  glutDisplayFunc( display );
  glutMainLoop();
 
  free (data);
 
  return 0;
}