Patent ID: 7046253

Claim:
A method of compositing a first graphic element (s) with a second graphic element (d) in accordance with a compositing operation associated with one of said graphic elements, each said element having a color (c) and opacity (o), said method comprising the steps of: (i) calculating a combined color from the first element color (sc) and the second element color (dc) without regard either to the first element opacity (so) or to the second element opacity (do) according to a predetermined operation (op), wherein said predetermined operation results in a function combining the first element color (sc) and second element color (dc); (ii) calculating a resulting opacity from the first element opacity (so) and second element opacity (do) without regard to any of the first element color (sc), the second element color (dc), or the predetermined operation (op); and (iii) calculating a resulting color as a combination of the first element color (sc), the combined color (sc op dc) and the second element color (dc).