Substrate implementation proposal

[BERGER Cyrille]

> I was more thinking of something for 'default tiles' instead of pixels in
> combination with
>     BORDER_DEFAULT_FILL = 0, // Use the default pixel to make up for the
> missing pixels on the border or the pixel that lies beyond
> :)
maybe, but DEFAULT_FILL is a bad idea for convolution, if you use it,
you will get a "dark border" (if default is black, or a blue border if
default is blue and so on). The two real options are BORDER_WRAP
(which isn't implemented yet) and BORDER_REPEAT.

--
Cyrille Berger