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[STR New]
Link: http://www.fltk.org/str.php?L1945
Version: 1.1.9
There seems to be a problem enabling the Stencil Buffer in nvidia cards.
I used http://seriss.com/people/erco/fltk/#OpenGlSimple and added
if (Fl_Gl_Window::can_do(FL_STENCIL))
mode(FL_STENCIL);
(See attached file)
This results in
XRequest.144: GLXBadDrawable 0x3400007
Confirmed in different machines running Nvidia cards, I don't have
different cards to test.
I have one report of this code working in RedHat9, but the machine was
updated to FedoraCore4 and the error appears.
Using the Stencil buffer in a real life example results in a black window.
Please test.
Thanks!
Link: http://www.fltk.org/str.php?L1945
Version: 1.1.9#include <FL/Fl.H>
#include <FL/Fl_Gl_Window.H>
#include <FL/gl.h>
//
// Simple resizable 2D GL window
// erco 10/08/05
//
class MyGlWindow : public Fl_Gl_Window {
// DRAW METHOD
// OpenGL window: (w,h) is upper right, (-w,-h) is lower left, (0,0)
is center
//
void draw() {
// First time? init viewport, etc.
if (!valid()) {
if (Fl_Gl_Window::can_do(FL_STENCIL))
mode(FL_STENCIL);
valid(1);
glLoadIdentity();
glViewport(0,0,w(),h());
glOrtho(-w(),w(),-h(),h(),-1,1);
}
// Clear screen
glClear(GL_COLOR_BUFFER_BIT);
// Draw white 'X'
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_LINE_STRIP); glVertex2f(w(), h()); glVertex2f(-w(),-h());
glEnd();
glBegin(GL_LINE_STRIP); glVertex2f(w(),-h()); glVertex2f(-w(), h());
glEnd();
}
// HANDLE WINDOW RESIZING
// If window reshaped, need to readjust viewport/ortho
//
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();
}
public:
// CONSTRUCTOR
MyGlWindow(int X,int Y,int W,int H,const char*L=0) :
Fl_Gl_Window(X,Y,W,H,L) {
}
};
// MAIN
int main() {
Fl_Window win(500, 300);
MyGlWindow mygl(10, 10, win.w()-20, win.h()-20);
win.end();
win.resizable(mygl);
win.show();
return(Fl::run());
}
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