This interface defines a source of quantized wavelet coefficients and
methods to transfer them in a code-block by code-block basis, fro the
decoder side.
The horizontal coordinates of the upper-left corner of the active
tile, with respect to the canvas origin, in the component hi-res grid,
for each component.
The vertical coordinates of the upper-left corner of the active tile,
with respect to the canvas origin, in the component hi-res grid, for
each component.