RE: [AD] RLE clipping speedup |
[ Thread Index | Date Index | More lists.liballeg.org/allegro-developers Archives ]
> I'm not convinced by these lines:
>
> + for (y=0; y<s->h; ++y) {
> + /* relocate pointers to be based at s->dat */
> + s->lines[y] = (signed char*)((int)s->lines[y] +
> (int)s->dat);
> + }
>
> Don't the 's->lines[y]' need to be scaled according to the
> pixel size ?
This is already done, the code you mention merely offsets the
precomputed pointers to start at s->dat. The "scaling" is done
automagically when the lines array is filled. The scaling is
in fact implicit, as the creation of the RLE_SPRITE already
scales its increments by the right size, and I use the pointers
it yields to fill lines, so that's why there is no explicit
scaling anywhere.
--
Vincent Penquerc'h
Mail converted by MHonArc 2.6.19+ | http://listengine.tuxfamily.org/ |