Update ANGLE_instanced_arrays spec.

extensions/ANGLE_instanced_arrays.txt

@@ -20,12 +20,12 @@ Contact
 
 Status
 
-    Draft
+    Implemented in ANGLE r976.
 
 Version
 
-    Last Modified Date: January 24, 2012
-    Author Revision: 2
+    Last Modified Date: February 8, 2012
+    Author Revision: 3
 
 Number
 
@@ -289,7 +289,8 @@ Errors
 
     INVALID_OPERATION is generated by DrawArraysInstancedANGLE or 
     DrawElementsInstancedANGLE if there is not at least one enabled
-    vertex attribute that has a <divisor> of zero.
+    vertex attribute array that has a <divisor> of zero and is bound to an
+    active generic attribute value in the program used for the draw command.
 
 New State
 
@@ -326,7 +327,8 @@ Issues
        emulating instancing), but it would not be very efficient and there
        seems to be little-to-no value in doing so.
 
-       If all of the enabled attributes have a non-zero divisor, the draw
+       If all of the enabled vertex attribute arrays that are bound to active
+       generic attributes in the program have a non-zero divisor, the draw
        call should return INVALID_OPERATION.
 
     3) Direct3D 9 only supports instancing for DrawIndexedPrimitive which
@@ -349,6 +351,8 @@ Issues
 
 Revision History
 
+    #3 February 8, 2012 dgkoch
+       - clarify Issue 3 and the error condition for no indexed attributes
     #2 January 24, 2012 dgkoch
        - fix typos, add clarifications, and more errors
     #1 January 17, 2012 dgkoch