Status of the OpenVG in mesa-git

I wonder what's the status of the OpenVG state tracker in mesa. I've just  
recompiled Qt with "-openvg" option, and tried to run an example from the  
Qt website, this is what I've got:


$ ./star -graphicssystem OpenVG
QEglContext::chooseConfig(): Could not find a suitable EGL configuration
Requested: "type=vg rgba=8,8,8,0 surface-type=window alpha-mask=1"
Available:
"id=1 type=es1,es2,gl,vg,15 rgba=8,8,8,8 surface-type=pixmap,1026
     caveat=none max-pbuffer-size=0x0 native-renderable=true
     visual-id=0 visual-type=12344 bind-texture=no-rgb,no-rgba
     min-swap-interval=0 max-swap-interval=0 conformant=true"
"id=2 type=es1,es2,gl,vg,15 rgba=8,8,8,8 depth=16 surface-type=pixmap,1026
     caveat=none max-pbuffer-size=0x0 native-renderable=true
     visual-id=0 visual-type=12344 bind-texture=no-rgb,no-rgba
     min-swap-interval=0 max-swap-interval=0 conformant=true"
"id=3 type=es1,es2,gl,vg,15 rgba=8,8,8,8 depth=24 stencil=8
     surface-type=pixmap,1026 caveat=none max-pbuffer-size=0x0
     native-renderable=true visual-id=0 visual-type=12344
     bind-texture=no-rgb,no-rgba min-swap-interval=0
     max-swap-interval=0 conformant=true"
"id=4 type=es1,es2,gl,vg,15 rgba=8,8,8,8 depth=24 surface-type=pixmap,1026
     caveat=none max-pbuffer-size=0x0 native-renderable=true
     visual-id=0 visual-type=12344 bind-texture=no-rgb,no-rgba
     min-swap-interval=0 max-swap-interval=0 conformant=true"
"id=5 type=es1,es2,gl,vg,15 rgba=8,8,8,8  
surface-type=window,pixmap,pbuffer,1031
     caveat=none max-pbuffer-size=4096x4096 native-renderable=true
     visual-id=255 visual-type=4 bind-texture=rgb,rgba
     min-swap-interval=0 max-swap-interval=0 conformant=true"
... etc.

I know OpenVG in Qt is still somewhat experimental, but I think at least  
this small example should work. So, could anyone enlighten me of the  
current situation of the OpenVG in mesa? Thanks in advance.