In Windows FE:

   $glqpixels _2 _2 4 4
16

   4 4$glqpixels _2 _2 4 4
0 0        0        0
0 0        0        0
0 0 15460845 15460845
0 0 15460845 15460845

In Java FE:

   $glqpixels _2 _2 4 4
0 0

The Windows behavior is correct and simplifies
the user code greatly to allow off-canvas operations.


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