[Cin] Plugins in integer or in float

[Andrew Randrianasulu]

пн, 6 нояб. 2023 г., 00:00 Andrew Randrianasulu <randrianasulu at gmail.com>:

>
>
> вс, 5 нояб. 2023 г., 23:16 Phyllis Smith via Cin <
> cin at lists.cinelerra-gg.org>:
>
>> Maybe Andrew knows how to detect this -- if it is just a matter of
>> looking at each plugin to see if it looks like the word "float" is in
>> effect for the majority of variables, that is something I could do.  Or if
>> Andrew has another way?
>>
>
> may be look for lines like
>
> case BC_RGB_FLOAT
> case BC_RGBA_FLOAT
>
> with grep -r  in plugins directory?
>

it looks like they all support at least input in float colorspace but
histogram for example calculates curves with 8/16 bit precision, may be
this is that gives clamping at the end? Does it exist if you output to
native tiff?

also, you can look for

grep "CLAMP" -r plugins/

clamp macro itself, but you need some code reading for understand what
exactly it clamps ...  for example all display output still 8bit, so there
is no sense yet to keep full range of channel  values for in-plugin drawing
...


sorry for absence of easy answer ...


>
>
>> On Sun, Nov 5, 2023 at 12:10 PM Andrea paz via Cin <
>> cin at lists.cinelerra-gg.org> wrote:
>>
>>> From the source code we can tell if a plugin works in 32 bit float or
>>> 8/10 bit integer?
>>> I don't know, maybe by searching for the string "float" in the code or
>>> something like that? Or the normalized range (0-1.0) instead of the
>>> range (0-255), etc.
>>> It would be important to put this information in the manual because,
>>> for example, I know that Histogram works with integers and this can
>>> lead to clipping (with loss of information) in highlights or deep
>>> blacks. In contrast, Blue Banana works in floats.
>>> --
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>>>
>> --
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>
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