[XeTeX] Redefining \XeTeXpic file and \XeTeXpdffile

[VAFA KHALIGHI]

Is it possible to redefine these two XeTeX's primitives,

What I want is \LR{\XeTeXpicfile "flowrr" heigh 4cm}, so can I redefine
\XeTeXpicfile so that when I write \XeTeXpicfile, it actually will be
surrounded by \LR{..}?

-- 
``Life is not empty,
There is kindness, there is apple and there is faith

One day will come,
and to a mendicant I will endow a jasmine''

-- Sohrab Sepehri
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