[sorry for the delay, project deadline approaching fast ;)]
Hello Andreas,
Andreas Halm wrote:
> I implemented supersampling using a rendercallbackstage with an fbo that has
> twice the size of the viewport, and then simply blitting from the fbo to the
> viewport. The code works well on my development machine (windows 7 64bit)
> but doesn't on the demo machine (vista 32bit).
>
> I am obviously missing something here ...
>
> void MyView::postBlitHQ(OSG::DrawEnv* pEnv)
> {
> glPushAttrib(GL_ALL_ATTRIB_BITS);
> FrameBufferObjectUnrecPtr pFBO = hqstage->getRenderTarget();
> glBindFramebufferEXT(GL_READ_FRAMEBUFFER,pFBO->getGLId());
^^^^^^^^^^^^^
does pFBO point to a OSG::FrameBufferObject? In that case getGLId() does
not give you a real OpenGL id, just one that identifies the real one
across all OpenGL contexts. You need to translate it to a real OpenGL id
with pEnv->getWindow()->getGLObjectId(pFBO->getGLId())
> glReadBuffer(GL_COLOR_ATTACHMENT0);
> glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER,0);
> CRect rect;
> GetClientRect(rect);
> glBlitFramebufferEXT(0,0,pFBO->getWidth(),pFBO->getHeight(),
> rect.left,rect.top,rect.right,rect.bottom, GL_COLOR_BUFFER_BIT, GL_LINEAR);
> glPopAttrib();
> }
>
> On a side note, the last glPopAttrib generates INVALID_OPERATION, which just
> doesn't make sense at all - any ideas welcome.
that is indeed strange. I guess you tried inserting a glGetError before
the glPopAttrib and it was good?
Cheers,
Carsten
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