AviSynth's "Overlay" command is what you're looking for. Look at the filter description in the AviSynth manual - the modes
mode="softlight" and
mode="hardlight" are said to exactly mimic the according transformations from Photoshop.
Personally, I don't like these transformations too much (they possibly create luma overflow, which then is calculated into chroma). What I use mostly are selfmade transformations through MaskTools' YV12Lut and YV12Lutxy commands.
Once I started my "replace all Overlay() transformations through YV12Lut/xy()" project, but didn't work on it since day 2 -- so it's still in the middle of somewhere, or nowhere ...
These are the extracted functions regarding "Hardlight":
Code:
#-----------------------------------------------------
function YV12Hardlight1(clip clp1, clip clp2, float "opacity", int "Cmode")
{
Cmode = default( Cmode, 2)
opacity = default( opacity, 1.0)
opacity = opacity<0.0 ? 0.0 : opacity>1.0 ? 1.0 : opacity
OPAC = string( opacity )
HL1 = "y 128 < "
HL1 = HL1 + "x x 128 / 128 y - abs * - "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "x 255 x - 128 / 128 y - abs * + "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "?"
return yv12lutxy(clp1,clp2,HL1,HL1,HL1,U=Cmode,V=Cmode)
}
function YV12Hardlight2(clip clp1, clip clp2, float "opacity", int "Cmode")
{
Cmode = default( Cmode, 2)
opacity = default( opacity, 1.0)
opacity = opacity<0.0 ? 0.0 : opacity>1.0 ? 1.0 : opacity
OPAC = string( opacity )
HL1 = "y 128 < "
HL1 = HL1 + "x x 16 < 16 x 16 - ? 128 / 128 y - abs * - "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "x x 235 > 235 235 x - ? 128 / 128 y - abs * + "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "?"
return yv12lutxy(clp1,clp2,HL1,HL1,HL1,U=Cmode,V=Cmode)
}
function YV12Hardlight3(clip clp1, clip clp2, float "opacity", int "Cmode")
{
Cmode = default( Cmode, 2)
opacity = default( opacity, 1.0)
opacity = opacity<0.0 ? 0.0 : opacity>1.0 ? 1.0 : opacity
OPAC = string( opacity )
HL1 = "y 128 < "
HL1 = HL1 + "x x 128 / 128 y - abs 128 / 1 2.0 / ^ 128 * * - "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "x 255 x - 128 / 128 y - abs 128 / 1 2.0 / ^ 128 * * + "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "?"
return yv12lutxy(clp1,clp2,HL1,HL1,HL1,U=Cmode,V=Cmode)
}
function YV12Hardlight4(clip clp1, clip clp2, float "opacity", int "Cmode")
{
Cmode = default( Cmode, 2)
opacity = default( opacity, 1.0)
opacity = opacity<0.0 ? 0.0 : opacity>1.0 ? 1.0 : opacity
OPAC = string( opacity )
HL1 = "y 128 < "
HL1 = HL1 + "x x 16 < 16 x 16 - ? 128 / 128 y - abs 128 / 1 1.4142 / ^ 128 * * - "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "x x 235 > 235 235 x - ? 128 / 128 y - abs 128 / 1 1.4142 / ^ 128 * * + "+OPAC+" * x 1 "+OPAC+" - * + "
HL1 = HL1 + "?"
return yv12lutxy(clp1,clp2,HL1,HL1,HL1,U=Cmode,V=Cmode)
}
#-----------------------------------------------------
Alas I didn't note the actual transformations done for the variants 1 - 4, so the user has to figure for itself
