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<p>Hi Ken Martin,</p>
<p><br>
</p>
<p>I believe I understood the core reason as why this message is displayed. I need some more details.</p>
<p><br>
</p>
<p>1) In what way <span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">OpenGL backend is different from the OpenGL2 backend
for VTK 6.3. Knowing that QVTKWidget will be deprecated, what pre-requisite conditions needs to be considered to stick myself working with QVTKWidget on various system?</span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">2) What exactly do you mean, when you say
<u>"</u><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><u>one was provided to VTK that did not include opengl support"</u>.
I guess all the latest Windows OS do come with OpenGL version greater than 1.1. So I think all the drivers must have OpenGL support right? Correct me if I am wrong.</span></span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">3)
Does this functionality really vary from one graphics card to another? I mean does it depend on the graphics card also? If so, how will I know whether my graphics card supports OpenGL backend or OpenGL2 backend?</span></span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><br>
</span></span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">Thank
You</span></span></p>
<p><br>
</p>
<div id="Signature">
<div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Warm Regards</p>
<p>Rakesh Patil</p>
</div>
</div>
<div style="color: rgb(0, 0, 0);">
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Ken Martin <ken.martin@kitware.com><br>
<b>Sent:</b> Saturday, March 12, 2016 1:03 AM<br>
<b>To:</b> Rakesh Patil<br>
<b>Cc:</b> vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] Need information about "Invalid pixel format, no opengl support" message.</font>
<div> </div>
</div>
<div>
<div dir="ltr">I believe you gave the specs for your desktop as opposed to the laptop.
<div><br>
</div>
<div>That message occurs on windows on the old OpenGL backend (and the OpenGL2 backend for VTK 6.3) It indicates that VTK tried to setup a device context for rendering but the device did not support opengl, either because VTK failed to find a suitable device
or because on was provided to VTK that did not include opengl support. </div>
<div><br>
</div>
<div>Thanks</div>
<div>Ken</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Mar 9, 2016 at 7:22 AM, Rakesh Patil <span dir="ltr">
<<a href="mailto:rakesh.p@tataelxsi.co.in" target="_blank">rakesh.p@tataelxsi.co.in</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-size:12pt; color:#000000; background-color:#ffffff; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi VTK users,</p>
<p><br>
</p>
<p>I am facing a strange issue. I am using QVTKWidget in my application and it works very well on my desktop computer. The same code when I try to compile on my laptop it throws me this error message:</p>
<p><br>
</p>
<p>"Invalid pixel format, no opengl support"</p>
<p><br>
</p>
<p>I would like to know what are the scenarios in which VTK throws this message. Whether there is any dependency on various versions of Windows OS? I believe it should not be. Below is the system information where I get this error:</p>
<p><br>
</p>
<p></p>
<div>OS Name: Microsoft Windows 8.1 Pro<span style="white-space:pre-wrap"> </span>
</div>
<div>Version:<span style="white-space:pre-wrap"> </span>6.3.9600 Build 9600</div>
<div><span style="white-space:pre-wrap"></span></div>
<div>OS Manufacturer: Microsoft Corporation<span style="white-space:pre-wrap"> </span>
</div>
<div><span style="font-size:12pt">System Manufacturer: </span><span style="font-size:12pt">Dell Inc.</span><span style="font-size:12pt; white-space:pre-wrap">
</span><br>
</div>
<div>System Model: Precision T1700<span style="white-space:pre-wrap"></span></div>
<div>System Type: x64-based PC<span style="white-space:pre-wrap"></span></div>
<div><span style="font-size:12pt">Processor</span><span style="font-size:12pt; white-space:pre-wrap">
</span><span style="font-size:12pt">Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz, 3592 Mhz, 4 Core(s), 8 Logical Processor(s)</span><span style="font-size:12pt; white-space:pre-wrap">
</span></div>
<div><span style="font-size:12pt">Installed Physical Memory (RAM): </span><span style="font-size:12pt">32.0 GB</span><span style="font-size:12pt; white-space:pre-wrap">
</span><br>
</div>
<div><span style="font-size:12pt">Total Virtual Memory: </span><span style="font-size:12pt">36.7 GB</span></div>
<div><span style="font-size:12pt">Display adapter: NVIDIA Quadro K620</span></div>
<div><span style="font-size:12pt"><br>
</span></div>
<div><span style="font-size:12pt">Note: I am not using QVTKWidget2. Kindly give some feedback as early as possible.</span></div>
<div><span style="font-size:12pt"><br>
</span></div>
<div><span style="font-size:12pt">Thank You</span></div>
<div><span style="white-space:pre-wrap"></span></div>
<div><br>
</div>
<div><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Warm Regards</span></div>
<span class="HOEnZb"><font color="#888888">
<p></p>
<div>
<div style="font-size:12pt; color:#000000; background-color:#ffffff; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Rakesh Patil</p>
<p><br>
</p>
<p></p>
</div>
</div>
</font></span></div>
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-- <br>
<div class="gmail_signature">Ken Martin PhD
<div>Chairman & CFO<br>
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