[vtkusers] OffScreen and blank window

[Clinton Stimpson]

Ok, that needed fixed for other reasons, and makes a difference if 
hardware offscreen is attempted but not supported.
Apparently, hardware offscreen creates the window and leaves it.  
Doesn't seem like offscreen to me :)

You'll have to ask Kitware why they create/leave the window for offscreen.
On the Mac, I thought offscreen simply worked by creating a window and 
use that as the rendering target, but never show it.

Clint

ABE Hiroshi wrote:
> Dear Clinton and all,
>
> Thank you for your suggestion, Clinton.
>
> I put the lines in vtkCarbonRenderWindow and saw what happened.
> Pop-up problem was still remained. May I understand your fix is for 
> remaining window problem?
> If so I cannot see the effect of the fix because I haven't any code 
> with the problem so far.
>
> Regarding a call, DisposeWindow, I found it is called in 
> vtkCarbonRenderWindow::Finalize(void)
> So I'm afraid it is not necessary in DestroyWindow.
>
> Regards,
> ABE Hiroshi
>  from Tokorozawa, JAPAN
>
> On 2009/05/21, at 23:11, Clinton Stimpson wrote:
>
>>
>> I see something else wrong, that needs fixed regardless of offscreen 
>> rendering.
>> Can someone try putting this at the end of 
>> vtkCarbonRenderWindow::DestroyWindow(), and see if it helps this 
>> offscreen problem?
>>
>> void vtkCarbonRenderWindow::DestroyWindow()
>> {
>> ...
>> ...
>>  if(this->OwnWindow && this->RootWindow)
>>    {
>>    DisposeWindow(this->RootWindow);
>>    this->RootWindow = 0;
>>    this->WindowId = 0;
>>    }
>>  this->Mapped = 0;
>> }
>>
>> vtkCocoaRenderWindow needs the same fix.
>>
>> Thanks,
>> Clint
>>
>> ABE Hiroshi wrote:
>>> Dear Simon and all,
>>>
>>> I am using Carbon version of VTK, so the situation might be 
>>> different from you, Simon.
>>> But I checked the vtkCarbonRenderWindow.cxx as you did for Cocoa 
>>> version, I found CreateAWindow calls ShowWindow to display the 
>>> renderwindow. So I changed the code as:
>>>
>>> vtkCarbonRenderWindow.cxx: 715
>>>
>>>     if(!this->GetOffScreenRendering() ) ShowWindow(this->RootWindow);
>>>
>>> Anyway it works as I expected, however, I am wondering if it might 
>>> be fit to the spec.
>>> Any suggestion?
>>>
>>> Regards,
>>> Hiroshi ABE
>>>
>>>
>
>
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