There are many aritmetic and bitwise blending modes
that do not have a direct equivalent using Imaging
blend modes... but probably (or not) these blending
modes could be "simulated" using color overlays,
groups, structural blends and imaging blend modes
Results may vary depending on OS, video card, and/or video drivers. Many
of these appear subtly different to me.
On May 15, 2017 11:39 PM, "Alejandro Tejada via use-livecode" <
[hidden email]> wrote:
> After a quick test, these are my results
> looking for identical and similar blend modes
> but notice that these results could differ
> from your own results:
> 1) srcXor = BlendExclusion = BlendDifference
> 2) srcOr = addMax = addPin = BlendDodge = BlendLighten = blendScreen =
> 3) srcCopy = Transparent = BlendHardLight
> 4) srcAnd = adMin = BlendBurn = BlendDarken = BlendMultiply
> 5) addOver = noop = BlendDstOver
> subPin almost looks like reverse
> There are many aritmetic and bitwise blending modes
> that do not have a direct equivalent using Imaging
> blend modes... but probably (or not) these blending
> modes could be "simulated" using color overlays,
> groups, structural blends and imaging blend modes
> use-livecode mailing list
> [hidden email] > Please visit this url to subscribe, unsubscribe and manage your
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> http://lists.runrev.com/mailman/listinfo/use-livecode >
On 2017-05-16 12:32, Roger Eller via use-livecode wrote:
> Results may vary depending on OS, video card, and/or video drivers.
> of these appear subtly different to me.
They shouldn't - all the blend mode code is cross-platform - so if there
is a difference across platform (which isn't down to just differences in
the Monitor's Color Profile) it would be a bug!
In this case, it is probably just that what you see will depend on what
the colors/alpha of the destination and source pixels are. Indeed, for
of the 'structural' blend modes, they don't do very much unless they
are used within a group which has ink 'blendSrcOver', as they modify
the destination alpha channel (which cards don't really have).