BlendAccuracy

Alpha-blending accuracy level

This primarily exists for performance reasons. In my tests LLVM manages to auto-vectorize the RGB-only codepath significantly better, while the codegen for the accurate RGBA path is pretty conservative.

This provides an optimization opportunity for use-cases that don’t require an alpha-channel on the result.

Values

Value	Meaning
rgb`false`	Only RGB channels will have the correct result. A(lpha) channel can contain any value. Suitable for blending into non-transparent targets (e.g. framebuffer, canvas) where the resulting alpha-channel (opacity) value does not matter.
rgba`true`	All RGBA channels will have the correct result. Suitable for blending into transparent targets (e.g. images) where the resulting alpha-channel (opacity) value matters. Use this mode for image manipulation.

BlendAccuracy

Values

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