glMatrixMode GL_PROJECTION glPushMatrix glLoadIdentity glOrtho static_

    glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();

    glOrtho(0, static_cast<double>(width), static_cast<double>(height), 0, 0, 1);

    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
    glLoadIdentity();

    glBegin (GL_QUADS);
    glTexCoord2d (0.0, 0.0);
    glVertex3f (0.0, 0.0, 0.0);

    glTexCoord2d (0.0, 1.0);
    glVertex3f (0.0, static_cast<GLfloat>(height), 0.0);

    glTexCoord2d (1.0, 1.0);
    glVertex3f (static_cast<GLfloat>(width), static_cast<GLfloat>(height), 0.0);

    glTexCoord2d (1.0, 0.0);
    glVertex3f (static_cast<GLfloat>(width), 0.0, 0.0);

    glEnd();

    glMatrixMode(GL_MODELVIEW);
    glPopMatrix();
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);