void Sprite::load ( long pos )
{
    std::FILE *fd = std::fopen ( "data", "r" );
    if ( !fd ) {
  std::perror ( "sprite load" );
  exit ( EXIT_FAILURE );
    }

    std::fseek ( fd, pos, SEEK_SET );

    std::fread ( &width, sizeof ( unsigned int ), 1, fd );
    std::fread ( &height, sizeof ( unsigned int ), 1, fd );
    std::fread ( &max_pixels, sizeof ( unsigned int ), 1, fd );

    pixels = new unsigned int [ max_pixels ];

    for ( int i = 0; i < max_pixels; i++ ) {
  std::fread ( &pixels [ i ], sizeof ( unsigned int ), 1, fd );
    }

    indices.length = max_pixels;
    indices.v = new unsigned char [ indices.length ];
    for ( int i = 0; i < indices.length; i++ ) {
  indices.v[i] = i;
    }
    v = new float [ 3 * 2 ];
    v[0] = 0.0f;
    v[1] = 1.0f;

    v[2] = 1.0f;
    v[3] = 0.0f;

    v[4] = 1.0f;
    v[5] = 1.0f;

    std::fclose ( fd );
}

void Sprite::render ( )
{
    glBindTexture ( GL_TEXTURE_2D, tex );
    glEnableClientState ( GL_VERTEX_ARRAY );
    glEnableClientState ( GL_TEXTURE_COORD_ARRAY );

    glVertexPointer ( 2, GL_FLOAT, 0, v );
    glTexCoordPointer ( 2, GL_FLOAT, 0, pixels );

    glPushMatrix ( );
    glTranslatef ( 0, 0, -10 );

    glDrawElements ( GL_TRIANGLES, indices.length, GL_UNSIGNED_BYTE, indices.v );
    glPopMatrix ( );

    glDisableClientState ( GL_VERTEX_ARRAY );
    glDisableClientState ( GL_TEXTURE_COORD_ARRAY );
    glFlush ( );
}