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Add colord package to block editor; Replace tinycolor2 with colord on duotone #34603

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jorgefilipecosta
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Part of #34286.
This PR replaces the tinycolor2 library with colord on the duotone hook.

How has this been tested?

I added some duotone filters to image with different color configurations and verified things still work.

@jorgefilipecosta jorgefilipecosta added the [Type] Code Quality Issues or PRs that relate to code quality label Sep 6, 2021
@@ -36,11 +39,10 @@ export function getValuesFromColors( colors = [] ) {
const values = { r: [], g: [], b: [] };

colors.forEach( ( color ) => {
// Access values directly to skip extra rounding that tinycolor.toRgb() does.
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Hi @ajlende, would you be able to check if this change is ok? Also if you have additional insights on why tinycolor.toRgb() was not a possibility before (in order to make sure we are not doing a mistake by calling colord.toRgb) it may be helpful. I checked that tinycolor.toRgb returns an object with {r,g,b} with values between 0 and 255 without any rounding it seems to access the internal tinycolor values is equivalent but I may be missing something.

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One of TinyColor's quirks is that it rounds values at random points within its calculations—sometimes at this point it's already rounded once and sometimes it isn't rounded yet. The browser rounds values used in CSS when displaying values, so it's usually not a problem. But SVG accepts floating point numbers for its color values and is doing a color operation on them, so it's better to skip as much intermediate rounding as possible.

It looks like colord also rounds the values in toRgb(), so if there's a way to skip that, it would probably be better. If not, it's not that big of a deal. Visually, you're probably not going to notice; just when using a color picker, the color values might be off by one in some edge cases.

TinyColor has a lot of quirks—I had to port it, along with all the quirks, to PHP for the SVG rendering there, so we'll also want to update lib/duotone.php too to match the behavior of colord.

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With switching the PHP over, @aristath has a library that we talked about during the initial duotone implementation that we may be able to switch over if it behaves the same as colord. #26752 (comment)

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Please let me know if we want to do something like that... I can definitely port colord to PHP or tweak the existing library as needed.

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I think in practice the rounding never happens on our use cases the colors most of the time come in hex "#ff0023" and so each RGB value is really an integer calling round on an integer returns the same number. I guess the case where we may have a difference is on the alpha part of the rgba but when dealing with alpha's the color that appears on the color picker is not predictable so having a unit difference on that case is ok I guess.

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Size Change: +12 B (0%)

Total Size: 1.07 MB

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@jorgefilipecosta jorgefilipecosta force-pushed the add/colord-package-block-editor-replace-tinycolor2-with-colord-on-duotone-hook branch from 0942d43 to 84d0a2d Compare September 27, 2021 15:38
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It looks like colord also rounds the values in toRgb(), so if there's a way to skip that, it would probably be better. If not, it's not that big of a deal. Visually, you're probably not going to notice; just when using a color picker, the color values might be off by one in some edge cases.

Based on these assumptions I guess we can merge this PR.

@jorgefilipecosta jorgefilipecosta merged commit 9149766 into trunk Sep 27, 2021
@jorgefilipecosta jorgefilipecosta deleted the add/colord-package-block-editor-replace-tinycolor2-with-colord-on-duotone-hook branch September 27, 2021 18:10
@github-actions github-actions bot added this to the Gutenberg 11.7 milestone Sep 27, 2021
@ajlende ajlende mentioned this pull request Apr 10, 2023
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