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Blending #3

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Ogeon opened this issue Dec 15, 2015 · 2 comments
Closed

Blending #3

Ogeon opened this issue Dec 15, 2015 · 2 comments
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0.2.1

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@Ogeon
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Ogeon commented Dec 15, 2015

There should be support for the common blending functions, like add, subtract, screen, overlay, etc. This may be restricted to RGB, unless it's intuitive in other spaces as well.
@retep998
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I don't know of any color spaces other than linear RGB that guarantee being able to trivially blend colors and get the correct result.

@Ogeon
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Ogeon commented Jan 12, 2016

Yeah, I think so too. This will most likely end up being an Rgb and Color exclusive feature.

@Ogeon Ogeon added this to the 0.2.1 milestone Jan 29, 2016
@Ogeon Ogeon mentioned this issue Feb 3, 2016
Merged
@homu homu closed this as completed in #39 Feb 23, 2016
homu added a commit that referenced this issue Feb 23, 2016
@homu
Auto merge of #39 - Ogeon:blending, r=sidred
46a2d4d 
Implement color blending

This introduces the `Blend` trait, which implements proper color blending for colors where it makes sense. The introduction of this trait includes:

 * Implementation of OpenGL style blending, with blending equations and blending parameters.
 * Implementation of most of the [SVG composition operators](https://www.w3.org/TR/SVGCompositing/#containerElementCompositingOperators) (also common in photo manipulation software).
 * Introduction of a type for premultiplied alpha, which is useful for lengthy composition chains.
 * Introduction of the `ComponentWise` trait, with functions for repeatedly performing actions on each component of a color. It's restricted to colors where all of the components are of the same type.

Closes #3.
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