OpenGL C++ вывод текста

//---------------------------------------------------------------------------
    HFONT font_h;
    GLuint font_list;
//---------------------------------------------------------------------------
void Tmain_form::create_fonts(void)
{
    LOGFONT logfont;
 
    logfont.lfHeight = -12;
    logfont.lfWidth = 0;
    logfont.lfEscapement = 0;
    logfont.lfOrientation = 0;
    logfont.lfWeight = FW_BOLD;
    logfont.lfItalic = FALSE;
    logfont.lfUnderline = FALSE;
    logfont.lfStrikeOut = FALSE;
    logfont.lfCharSet = DEFAULT_CHARSET;
    logfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
    logfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
    logfont.lfQuality = DEFAULT_QUALITY;
    logfont.lfPitchAndFamily = DEFAULT_PITCH;
    strcpy(logfont.lfFaceName, "Trebuchet MS"); 
 
    font_h = CreateFontIndirect(&logfont);
 
    logfont.lfWeight = FW_NORMAL;
    default_font_h = CreateFontIndirect(&logfont);
}
//---------------------------------------------------------------------------
void Tmain_form::destroy_fonts(void)
{
    DeleteObject(font_h);
    DeleteObject(default_font_h);
}
//---------------------------------------------------------------------------
void Tmain_form::create_gl_fonts(void)
{
    SelectObject(hdc, font_h);
    font_list = glGenLists(256);
    wglUseFontBitmaps(hdc, 0, 256, font_list);
 
    SelectObject(hdc, default_font_h);
    default_font_list = glGenLists(256);
    wglUseFontOutlines(hdc, 0, 256, default_font_list, 0, 0.5, WGL_FONT_POLYGONS, default_gmf);
}
//---------------------------------------------------------------------------
void Tmain_form::destroy_gl_fonts(void)
{
    glDeleteLists(font_list, 1);
    glDeleteLists(default_font_list, 1);
}
//---------------------------------------------------------------------------
void Tmain_form::print(const float x, const float y, const AnsiString s)
{
    glRasterPos2f(x, y);
    glListBase(font_list);
    glCallLists(s.Length(), GL_UNSIGNED_BYTE, ide2std(s).c_str());
}
//---------------------------------------------------------------------------
//...
    create_fonts();
    create_gl_fonts();
//...
    //print...

HFONT default_font_h;
GLuint default_font_list;
GLYPHMETRICSFLOAT default_gmf[256];

//------------------------------------------------------------------------------
float get_txt_width(const char *s)
{
    float res = 0;
    while (*s)
        res += default_gmf[(unsigned char)*s++].gmfCellIncX;
    return res;
}
//------------------------------------------------------------------------------
void txt::render(void)
{
    glColor3f(r, g, b);
 
    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
 
    glTranslatef(p.x, p.y, 0); //точка вставки текста
    glRotatef(a, 0, 0, 1); //угол поворота
    glScalef(my? -s : s, mx? -s : s, 0); //зеркало и масштаб
    if (middle_center) glTranslatef(-get_txt_width(value.c_str()) / 2, -0.5, 0); //центрирование если необходимо
 
    glPolygonMode(GL_FRONT, GL_FILL);
    glPolygonMode(GL_BACK, GL_FILL);
 
    glListBase(default_font_list);
    glCallLists(value.size(), GL_UNSIGNED_BYTE, value.c_str()); //value - текст
 
    glPolygonMode(GL_FRONT, GL_LINE);
    glPolygonMode(GL_BACK, GL_LINE);
 
    glPopMatrix();
}

#include <GL/freeglut.h>
#include <string>
 
void drawText(float x, float y, std::string text)
{
    glRasterPos2f(x, y);
    glutBitmapString(GLUT_BITMAP_8_BY_13, (const unsigned char*)text.c_str());
}
 
void draw()
{
    glClear(GL_COLOR_BUFFER_BIT);
    drawText(0, 0, "Hello, World!");
    glutSwapBuffers();
}
 
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize(256, 256);
    glutCreateWindow("Drawing Text");
    glutDisplayFunc(draw);
    glutMainLoop();
    return 0;
}