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Investigate more options for client-side image controls #79

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dstndstn opened this issue Nov 10, 2021 · 0 comments

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dstndstn commented Nov 10, 2021

Beyond brightness/contrast sliders.

The SVG standard has a rich set of color transformation functions, the most general being component-wise functions including gamma and piecewise linear:
https://drafts.fxtf.org/filter-effects/#feFuncRElement
There is also a matrix combiner for RGBA,
https://drafts.fxtf.org/filter-effects/#feColorMatrixElement

Not sure whether this can wrap our whole Leaflet map object. Looks like maybe you can, using the 'url' function in CSS:
https://developer.mozilla.org/en-US/docs/Web/CSS/filter#applying_svg_filters

This page gives a good summary of the CSS filters available and their SVG equivalents.
https://developer.mozilla.org/en-US/docs/Web/CSS/filter

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