TSL: Add blendNormal() to BlendMode.

[Mugen87]

Related issue: #29597 (comment)

Description

This PR adds a blendNormal() helper which simplifies the SSR blend on app level.

BTW: Is BlendMode a typo? Should it be BlendNode?

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	339.37 79.06	339.37 79.06	+0 B +0 B
WebGPU	477.94 132.55	478.14 132.61	+196 B +59 B
WebGPU Nodes	477.41 132.42	477.61 132.49	+196 B +61 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	464.82 112.02	464.82 112.02	+0 B +0 B
WebGPU	546.87 148.17	546.87 148.17	+0 B +0 B
WebGPU Nodes	502.75 137.88	502.75 137.88	+0 B +0 B

[sunag]

BTW: Is BlendMode a typo? Should it be BlendNode?

Maybe BlendModes? We are using the Node suffix only when there is an extended class of Node.

[sunag]

Do you think blendNormal is better? Especially in auto-complete, I was thinking about renaming the others too.

[Mugen87]

Maybe BlendModes? We are using the Node suffix only when there is an extended class of Node.

Got it. 👍

BlendModes sounds better since the module is a collection of blend functions.

Do you think blendNormal is better? Especially in auto-complete, I was thinking about renaming the others too.

Sounds good! I'll update the PR.