Hi,
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());
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.
Aloha, Andi
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