Re: [fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
I use a Dell precision What does this means in terms of the graphics card? Those specifics are probably useful to help replicate. I don't have any dell equipment here (though one of the other devs might), but depending on the graphics, that might help zero it in. That means a NVIDIA Quadro FX 880M graphics card I am wondering about the drivers also, but I cannot say for sure. I did upgrade my drivers before posting just to make sure, but still it is strange that I cannot see this behaviour on any other opengl program. I did download and compile freeglut, their demos run smooth without any problems. I see. Well, you could open an STR with all the details we've found to date. It's going to be a problem though if the devs can't replicate. If you're able to identify the issue, supply a patch, or at least let us know what changes the problem if you try messing around with the FLTK innards. You may find something in the FLTK opengl win32 initialization code that needs adjusting. I also suspect that there might be problems replicating this bug, so I will try to do some digging of my own. Since I have built the FLTK library on my own, I might tinker a bit with the source and might run a strace (or windows equiv.) on the glut demos and the fltk demos to see if there might be a difference. You might try tweaking the freeglut examples to enable features FLTK is enabling (double buffer mode, etc) to see if you can perhaps replicate the problem outside FLTK, to see if it's a particular opengl feature causing the problem. This will be the first Ill be checking. I'll get back when I have some results. ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
Re: [fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
On 04/09/13 23:24, Ivan Nedrehagen wrote: I also suspect that there might be problems replicating this bug, so I will try to do some digging of my own. Since I have built the FLTK library on my own, I might tinker a bit with the source and might run a strace (or windows equiv.) on the glut demos and the fltk demos to see if there might be a difference. Yes, strace might be good, and also I think there's a way to view the X11 messages going back and forth.. It might be as easy as setting an environment variable, or attaching a program to the process or some such.. can't remember. Sometimes just running the app through a remote xsession would let you sniff the X11 network messages (ethereal, or wireshark, or whatever its called these days which sniffs network packets and deconstructs them at the protocol level into meaningful messages. Used this once to solve an STR a few years ago where our code was creating zero sized windows IIRC) ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
Re: [fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
Which version of FLTK (1.3.1, 1.3.2..) I use FLTK 1.3.2 Also: do the FLTK opengl test programs cube.exe and shape.exe exhibit this same behavior? Yes they do. I cannot replicate with Win7 + mingw-64 (gcc4.5.2) + fltk 1.3.x-svn current; I am using the 4.7.2 rev 9 with Win 7 Hardware is a mac mini running win7/64 ultimate, default drivers. I use a Dell precision If you're getting this behavior with all the GL demos, try downloading GLUT and see if their demos do it too. If so, it's probably your GL drivers. If not, let us know.. I am wondering about the drivers also, but I cannot say for sure. I did upgrade my drivers before posting just to make sure, but still it is strange that I cannot see this behaviour on any other opengl program. I did download and compile freeglut, their demos run smooth without any problems. ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
Re: [fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
On 04/09/13 10:07, Ivan Nedrehagen wrote: Which version of FLTK (1.3.1, 1.3.2..) I use FLTK 1.3.2 Also: do the FLTK opengl test programs cube.exe and shape.exe exhibit this same behavior? Yes they do. Right, good to know. I cannot replicate with Win7 + mingw-64 (gcc4.5.2) + fltk 1.3.x-svn current; I am using the 4.7.2 rev 9 with Win 7 Hardware is a mac mini running win7/64 ultimate, default drivers. I use a Dell precision What does this means in terms of the graphics card? Those specifics are probably useful to help replicate. I don't have any dell equipment here (though one of the other devs might), but depending on the graphics, that might help zero it in. I am wondering about the drivers also, but I cannot say for sure. I did upgrade my drivers before posting just to make sure, but still it is strange that I cannot see this behaviour on any other opengl program. I did download and compile freeglut, their demos run smooth without any problems. I see. Well, you could open an STR with all the details we've found to date. It's going to be a problem though if the devs can't replicate. If you're able to identify the issue, supply a patch, or at least let us know what changes the problem if you try messing around with the FLTK innards. You may find something in the FLTK opengl win32 initialization code that needs adjusting. You might try tweaking the freeglut examples to enable features FLTK is enabling (double buffer mode, etc) to see if you can perhaps replicate the problem outside FLTK, to see if it's a particular opengl feature causing the problem. ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
Re: [fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
On 04/02/13 02:28, Ivan Nedrehagen wrote: Does anyone know how I can get the Fl_Gl_Window to play nicely in windows? Which version of FLTK (1.3.1, 1.3.2..) Also: do the FLTK opengl test programs cube.exe and shape.exe exhibit this same behavior? I cannot replicate with Win7 + mingw-64 (gcc4.5.2) + fltk 1.3.x-svn current; your app opens right up, no weird behavior while it opens. Same with the cube.exe and shape.exe demos. Hardware is a mac mini running win7/64 ultimate, default drivers. If you're getting this behavior with all the GL demos, try downloading GLUT and see if their demos do it too. If so, it's probably your GL drivers. If not, let us know.. ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
Re: [fltk.opengl] Fl_Gl_Window flashes on context creation(Windows7)
You may need to update your libraries or try another compiler, the program runs fine on my Ubuntu64 Linux. Yes it does run fine on my Ubuntu too. The problem are the context creation when running in Windows7. This is using the FLTK 1.3.2 library, compiled with the mingw64 gcc compiler (v.4.7.2 rev9) with the x86_64-w64-mingw32 target. ___ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
[fltk.opengl] Fl_Gl_Window flashes on context creation (Windows7)
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?
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