You may need to update your libraries or try another compiler, the program runs fine on my Ubuntu64 Linux.
[image: Inline image 3] On Tue, Apr 2, 2013 at 3:28 AM, Ivan Nedrehagen <ivann...@gmail.com> wrote: > This was originally a FTGL question on stack overflow > > > http://stackoverflow.com/questions/15568520/fl-gl-window-flashes-on-creation > > I have some simple fltk code: > > #include <FL/Fl.H> > #include <FL/Fl_Gl_Window.H> > #include <FL/gl.h> > > class MyWin : public Fl_Gl_Window { > public: > MyWin(int x,int y, int w,int h, const char*l = 0) : > Fl_Gl_Window(x,y,w,h,l) > { > } > void draw(); > void resize(int X,int Y,int W,int H) { > Fl_Gl_Window::resize(X,Y,W,H); > glLoadIdentity(); > glViewport(0,0,W,H); > glOrtho(-W,W,-H,H,-1,1); > redraw(); > } > }; > > void MyWin::draw() { > ortho(); > glBegin(GL_QUADS); > glColor3d(1,0,0); > glVertex3f(10,10,0); > glColor3d(0,1,0); > glVertex3f(w()-10,10,0); > glColor3d(0,0,1); > glVertex3f(w()-10,h()-10,0); > glColor3d(1,1,0); > glVertex3f(10,h()-10,0); > glEnd(); > } > > int main(int argc,char* argv[]) { > Fl_Window win(500,500, "OpenGL"); > MyWin window(10,10,win.w()-20,win.h()-20); > win.end(); > win.resizable(window); > win.show(argc,argv); > return Fl::run(); > } > > This example compiles and links perfectly for me on Windows 7 using mingw, > but when I run it, it gets quite ugly. First the screen turns dark, and > flashes with white. Then the screen is redrawn and my window appears. The > same happens when I shut down the application. > > I have tried to remove the drawing code, the same happens, then I removed > the gl window from the outer window and it still happens. So it is not > affected by the actual drawing. So my suspicion is that the opengl context > creation causes this. Removing the creation of the gl window supports this > hypothesis as the window now appears "quietly". > > Does anyone know how I can get the Fl_Gl_Window to play nicely in windows? > _______________________________________________ > fltk-opengl mailing list > fltk-opengl@easysw.com > http://lists.easysw.com/mailman/listinfo/fltk-opengl > -- --- Cheers, Gnusci
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