[Bf-cycles] CUDA error with Cycles_standalone

[Zhanpeng Feng]

Hi Brecht, 
Thanks for looking into this. This is actually an error introduced by myself. I was trying to get familiar with cycles code by playing with it and I added these three lines to void Session::update_status_time(bool show_pause, bool show_done) function:tonemap();
progress.set_status("Writing Image", params.output_path);
display->write(device, params.output_path);
which now I understand are not supposed to be there. 
I have one question though. I would like to be able to save the rendered image from cycles_standalone without invoking the GUI. However, the only function I can find for doing that is display->write(). I think display is a null object if cycles_standalone is run in background mode. So how do we save an image in background mode?
Thanks a lot,Feng


> From: brechtvanlommel at pandora.be
> Date: Fri, 21 Feb 2014 15:42:04 +0100
> To: bf-cycles at blender.org
> Subject: Re: [Bf-cycles] CUDA error with Cycles_standalone
> 
> Hi,
> 
> I couldn't reproduce this problem on Mac OS X, I'm not sure what is
> going on. Perhaps your graphics card doesn't support an OpenGL feature
> that we use, but even then it's not clear to me why it would give this
> error.
> 
> Which graphics card(s) do you have?
> 
> Brecht.
> 
> On Wed, Feb 19, 2014 at 12:05 AM, Zhanpeng Feng <jumpjump88 at hotmail.com> wrote:
> > Hi,
> >
> > I was trying to use the cycles_standalone and and got the following error. I
> > am wondering if anyone has seen similar issues?
> > Error message:
> > D:\blenderSVN_2\cmake-build\bin\Debug>cycles --device cuda --samples 10
> > monkeyte
> > st.xml --output this.bmp
> > CUDA error: Invalid context in cuGraphicsMapResources(1,
> > &pmem.cuPBOresource, 0)
> >
> >
> > Refer to the Cycles GPU rendering documentation for possible solutions:
> > http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/GPU_Rendering
> >
> > CUDA error: Not mapped in cuGraphicsResourceGetMappedPointer(&buffer,
> > &bytes, pm
> > em.cuPBOresource)
> > CUDA error: Not mapped in cuGraphicsUnmapResources(1, &pmem.cuPBOresource,
> > 0)
> > CUDA error: Launch failed in cuCtxSynchronize()
> >
> > In the cycles standalone GUI I am able to see the rendering progresses and
> > the scene is actually being rendered fine. No error occurs until tonemap()
> > is called in the
> > void Session::update_status_time(bool show_pause, bool show_done) function
> > of session.cpp
> > else if(show_done) {
> > status = "Done";
> > tonemap();
> > progress.set_status("Writing Image", params.output_path);
> > display->write(device, params.output_path);
> > }
> > If I run it using --device cpu everything works fine.
> > Any help is appreciated.
> >
> > Thanks a lot,
> > Feng
> >
> > _______________________________________________
> > Bf-cycles mailing list
> > Bf-cycles at blender.org
> > http://lists.blender.org/mailman/listinfo/bf-cycles
> >
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