Unhandled exception on openGL text display - c++

Question

I am trying to draw text using openGL which will be displayed in a window, over a kinect camera image. The program can draw squares and other shapes fine, but when I call the method to draw the text, it crashes. It seems to be crashing on the
glutStrokeCharacter(font, c);
Everything else works and when I comment out just this line the program still runs fine. Below is a code snippet of how I try and draw the text.
void Button::DrawSquare(bool selected)
{
glEnable( GL_POINT_SMOOTH );
glLineWidth(7);
if (selected == true) glColor3f(0,1,0);
else glColor3f((123.0/255.0f),(205/255.0f),(237.0/255.0f));
glBegin(GL_LINE_LOOP);
glVertex2f(X, Y);
glVertex2f(X+length, Y);
glVertex2f(X+length, Y+width);
glVertex2f(X, Y+width);
glEnd();
glLineWidth(3);
glColor3f(0,0,0);
glBegin(GL_LINE_LOOP);
glVertex2f(X, Y);
glVertex2f(X+length, Y);
glVertex2f(X+length, Y+width);
glVertex2f(X, Y+width);
glEnd();
glLineWidth(4);
//Start drawing text
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
if (selected == true) glColor3f(0,1,0);
else glColor3f(1,1,0);
void *font = GLUT_BITMAP_TIMES_ROMAN_10;
glRasterPos2i(this->X+15,this->Y+35);
string s(*this->trackname);
for (string::iterator i = s.begin(); i != s.end(); ++i)
{
char c = *i;
glutStrokeCharacter(font, c);// <<-- Line that gives error
}
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glColor3f(255,255,255);
}
The drawing of the squares just before the text works fine.

Answer 1

Here is a minimal working example of how to render text using glutBitmapCharacter:
static const std::string text_to_render = "testing 1 2 3 4";
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
glDisable( GL_DEPTH_TEST ); // disable to render text in front of anything else
glRasterPos2f(0, 0); // center of screen
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
GLvoid * font = GLUT_BITMAP_TIMES_ROMAN_10;
glColor3f(1.0f, 0.0f, 0.0f);
for(char chr : text_to_render)
{
glutBitmapCharacter(font, chr);
}
glEnable(GL_DEPTH_TEST); // re-enable depth test
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glutSwapBuffers();
}
The only difference here is that I'm disabling OpenGL's GL_DEPTH_TEST and I'm loading the identity matrices after pushing the current matrices.
Let me know if this is of any help.