Re: Simulating program functions/filters

["Harald Heim" <Harald.Heim@phil.stud.uni-erlangen.de>]

Hi,

Ok, then here are my TF codes for blending images. c0 is the RGB 
value of image source 0, c1 is the RGB value of image source 1.


Lighten:
max(c0,c1)

Darken:
min(c0,c1)

Screen:
255-((255-c0)*(255-c1)/256)

Multiply:
put(c0*c1/256,1)

Hard Light
c0<128?(2*c0*c1/256):255-2*(255-c0)*(255-c1)/256

Soft Light
c1<128?2*scl(c0,0,255,64,192)*c1/256:255-(2*(255-
scl(c0,0,255,64,192))*(255-c1)/256)

Difference
abs(c0-c1)

Inversion
abs(c0-(255-c1))

Melt (invented by myself):
sqr(c0*c1)

Mix (invented by myself):
255-sqr((255-c0)*(255-c1))

Invert A (invented by myself):
255-abs((255-c0)-c1)

Invert B (invented by myself):
255-abs(c0-c1)


Hope this helps,
Harry


> Although FF and FiFo cannot combine two images or two layers, you still
> can create like new textures and combine them with the original image.
> This is used very often in FF codes.
> 
> I won't be updating the FFPG any more. Several reasons: - We have
> now a FF successor (FiFo), hopefully we will be seeing some FM as
> well - I am writing my thesis ;-) 
> 
> That's why I proposed on a new FAQ, whose codes can be taken and
> used in FF, FiFo and FM. BTW, has someone heard of the "BMP
> wizard"? I think Mr Benoni discontinued it... 


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