csgl-users

[Csgl-users] CsGL update

[Lloyd D. <ll...@ga...>]

(just a not i made a mistake while updating yesterday, correcti it now, 
but incorrect file could still be on the server for a few minutes...)

2 new interesting improvement for OpenGL:
     a new OpenGL font class
     a new OpenGLContext class with an interesting ToImage() method
     some more method with safe version.
     a new Nehe lesson (17) showing this 2 feature in action..

coming: SDL sound (but i have some trouble..)

after that...
CsGL (CSharp Graphic Library) will become
CsGL (CSharp Gaming Library)...
i will post a call to help soon, but i could already inform you, help 
would be needed to design a widget API on top of OpenGL (using SDL for 
event and the like...), to help for a demo game, and other such idea (IA 
? 3D engine ?...)

[Csgl-users] CsGL update

[Lloyd D. <ll...@ga...>]

Hi guys there is an update of CsGL (yeah again),
so, what's news ?

a.. the OpenGLFont and OpenGLTexture2D are now ContextLocal, alloc once, =
use on any context easily...=20
a.. the GDITextureFont has a nicer output=20
a.. about 40 new safe function=20
a.. a new related project GLViewer

the new porject (which I write tool) is (in my opinion very nice) a =
generic 3D model viewer, this mean you could either write SimpleGLModel=20
//---
public MyModel : SimpleGLModel
{
    public override Draw()
    {
        glSomething();
    }
}

and that's it, the viewer could display it, dynamically loading your =
dll... I think it could help...
you could also write an IGLModelReader interface, put the dll in =
bin/filters, and the viewer will suddenly become
able to open your file format

that's it, enjoy and give me your feedback....

[Csgl-users] CsGL update

[Lloyd D. <ll...@ga...>]

  a.. all 1.1 OpenGL & GLU call now implemented.
  b.. correct (& safe) implementation for the 2 provided OpenGL extension.
  c.. there is a basic doc provided (mainly describing C++ object now).
  d.. the webdemo work locally, launch webdemo.html in <csgl>/examples/NeHe.

[Csgl-users] Memory overrun in "csopengl.h/c"?

[Ben H. <be...@ex...>]

Csopengl.h:
-----
typedef struct HG3D
{
	unsigned type : 1;
	HWND     wnd;
	HDC      gdi;
	HGLRC    glctxt;
	HBITMAP  image;
}
G3D, * HG3D;
-----

Csopengl.c:
-----
	ctxt = (HG3D) malloc(sizeof(HG3D));
	if(!ctxt)
		return NULL;
-----

I am not sure but shouldn't it be "sizeof(G3D)" and not "sizeof(HG3D)"?
Otherwise wouldn't there be a memory overrun?
 
Cheers,
-ben houston
4th Year Cognitive Science/Neuroscience
Carleton University, Ottawa, Canada
( be...@ex... / 613-266-0637 )

Re: [Csgl-users] Memory overrun in "csopengl.h/c"?

[Lloyd D. <ll...@ga...>]

> 	ctxt = (HG3D) malloc(sizeof(HG3D));
> 	if(!ctxt)
> 		return NULL;
> -----
>
> I am not sure but shouldn't it be "sizeof(G3D)" and not "sizeof(HG3D)"?
> Otherwise wouldn't there be a memory overrun?
>
>
oopps !
what a beginner's mistake ! you totally right !
i will correct it tonight, and would update the site as well...


.
.
.
> ------
> DLLOBJ int DMrelease3DCtxt(HG3D ctxt)
> {
> ....
> }
> ------
>
> I did some checks and unless you dispose of OpenGLContext from the
> thread on which you created it, instead of letting the GC delete it
> later, both the wglDeleteContext() and ReleaseDC() will fail.  Currently
> "csopengl.c" doesn't check if they fail so you would never know if you
> are writing bad code.

hu....
this is a tedious issue i was not aware of...
GC should have its own separate thread so this is not the solution. 
(does it work for you ?)

i will think of it...