Hi
Only a guess, but maybe it is used when we display some channels of the
parametric masks, or when we display the masks?
rawfiner
Le sam. 1 févr. 2020 à 13:28, Heiko Bauke <heiko.ba...@mail.de> a écrit :
> Hi,
>
> all blend modes that operate in Lab space have some special treatment
> for the case that a module sets the flag IOP_FLAGS_BLEND_ONLY_LIGHTNESS.
> However, I cannot find any module that actually sets this flag.
> Furthermore, it seams to me not reasonable why the behavior of a blend
> mode should depend on a module flag.
>
> Can we get rid of this? Is there any good reason why we have this in
> darktable?
>
> To give an example,
>
> > if(flag == 0)
> > {
> > tb[1]
> =clamp_range_f(ta[1]*(1.0f-fabsf(tbo-tb[0]))+0.5f*(ta[1]+tb[1])*fabsf(tbo-tb[0]),
> > min[1], max[1]);
> > tb[2]
> =clamp_range_f(ta[2]*(1.0f-fabsf(tbo-tb[0]))+0.5f*(ta[2]+tb[2])*fabsf(tbo-tb[0]),
> > min[2], max[2]);
> > }
> > else
> > {
> > tb[1] = ta[1];
> > tb[2] = ta[2];
> > }
>
> in _blend_darken would simplify to
>
> > tb[1]
> =clamp_range_f(ta[1]*(1.0f-fabsf(tbo-tb[0]))+0.5f*(ta[1]+tb[1])*fabsf(tbo-tb[0]),
> > min[1], max[1]);
> > tb[2]
> =clamp_range_f(ta[2]*(1.0f-fabsf(tbo-tb[0]))+0.5f*(ta[2]+tb[2])*fabsf(tbo-tb[0]),
> > min[2], max[2]);
>
>
> Heiko
>
>
> --
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