RE: [osg-users] Shader debug

[Gilbert, Daniel R.]

Andy,   Glad you figured it out.  I was pretty much doing the same thing, but added the extra step of checking the log for instances of "error".   I originally added this functionality to check for obvious compilation errors (syntax, etc), but this doesn't work if the user's system doesn't support GLSL.  I don't know if you're already performing this check, but if not here's a code snippet that someone recommended:   osg::GL2Extensions* gl2Ext = osg::GL2Extensions::Get(contextID, true); if (!gl2Ext->isGlslSupported()) {     // do whatever here }   Basically I do this quick test first.  If it passes I continue on to the test compile and info log checking.   -- Dan From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andy Preece Sent: Friday, November 03, 2006 7:11 AM To: osg users Subject: RE: [osg-users] Shader debug Just had a thought…. My shader compiles successfully as it has no errors, so I tried introducing an error into the shader and Bingo!   Now I get ‘Loaded Shader OK: ‘Error: <error message>’ for context 0.   I guess you don’t get a log if the shader compiles OK. J   Andy.   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andy Preece Sent: 03 November 2006 14:42 To: osg users Subject: RE: [osg-users] Shader debug   Hi Dan,   Here is my code snippet. Can you spot what I am doing wrong? It looks like your suggested fix!   I always get the message ‘Loaded Shader failed: ‘’ for context 0.’   I am using OSG 1.1.   Regards, Andy   void CSockTestView::OnShowWindow( BOOL bShow,UINT nStatus ) {   printf( "\nIn CSockTestView::OnShowWindow\n" ) ;   if ( bShow && !renderSurfaceRealized )   {     m_RenderSurface -> realize() ;     renderSurfaceRealized = true ;       unsigned int contextID = m_SceneView -> getState() -> getContextID() ;     osg::Shader *fragShad = noiseProgram -> getShader( 0 ) ;     printf( "Fragment prog: 0x%p.\n", fragShad ) ;       fragShad -> compileShader( contextID ) ;       // Added these lines out of desperation!!     m_SceneView -> update();     m_SceneView -> cull();     m_SceneView -> draw();       std::string logStr ;       if ( fragShad -> getGlShaderInfoLog( contextID, logStr ) )       printf( "\nLoaded shader OK: '%s' for context %d.\n", logStr.c_str(), contextID ) ;     else       printf( "\nLoaded shader failed: '%s' for context %d.\n", logStr.c_str(), contextID  ) ;   }     CView::OnShowWindow(bShow, nStatus); }     -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gilbert, Daniel R. Sent: 26 October 2006 17:16 To: osg users Subject: RE: [osg-users] Shader debug   Hi Andy,   I had to do something similar recently, as I wanted to be able to fall back to a non-shader approach for some functionality if anything went wrong during the compile.   I'm not sure when you're attempting to access shader->getGlShaderInfoLog(), but I also was getting false and and empty string when I first tried.  In my case it was because I was trying to access it before it was actually compiled.  Forcing it to compile first worked for me:    osg::Shader* shader = program->getShader(0);  // I only have 1 shader attached  shader->compileShader(contextID);   // contextID  bool logFound = shader->getGlShaderInfoLog(contextID, log);   This did the trick for me at least.   Hope this helps,   -- Dan   > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Andy Preece > Sent: Thursday, October 26, 2006 9:06 AM > To: osg users > Subject: RE: [osg-users] Shader debug > > Hi, > > That's fine for applications that have a console. I am > writing a Windows > based application that has no console so stdout output is lost. > > However, I would like to catch a situation where a shader fails to > compile and display a pop up screen with the shader info. > > Is there a way I can achieve this? > > Andy. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Charles Cosse > Sent: 26 October 2006 15:19 > To: osg users > Subject: Re: [osg-users] Shader debug > > Hi, > > on linux you can export OSG_NOTIFY_LEVEL=DEBUG and recompile ... then > shader info is printed to the terminal when you run.  Maybe > that helps.. > > -charlie > > Andy Preece wrote: > > > Hi All, > > > >  > > > > Can anyone show me how to get the shader info log from an > osg::shader > > class? > > > > I have tried using the osg::Shader::getGlShaderInfoLog() > method but it > > > always return false and the string returned is always NULL. > > > >  > > > > Regards, > > > > Andy > > > > > > > ______________________________________________________________ > __________ > > This e-mail has been scanned for all viruses by Star.The service is > > powered by MessageLabs. > > > ______________________________________________________________ > __________ > > > >------------------------------------------------------------- > ---------- > - > > > >_______________________________________________ > >osg-users mailing list > >osg-users@openscenegraph.net > >http://openscenegraph.net/mailman/listinfo/osg-users > >http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > osg-users@openscenegraph.net > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > > ______________________________________________________________ > __________ > This e-mail has been scanned for all viruses by Star.The > service is powered by MessageLabs. > ______________________________________________________________ > __________ > _______________________________________________ > osg-users mailing list > osg-users@openscenegraph.net > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ ________________________________________________________________________ This e-mail has been scanned for all viruses by Star.The service is powered by MessageLabs. ________________________________________________________________________ ________________________________________________________________________ This e-mail has been scanned for all viruses by Star.The service is powered by MessageLabs. ________________________________________________________________________

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