VideoTexture: Restore inline sRGB decode.

[Mugen87]

Fixed #26516.
Fixed #26183.

Description

Because of the broken SRGB8_ALPHA8 support for video textures in Webkit and a Chromium performance issue (https://bugs.chromium.org/p/chromium/issues/detail?id=1451195) this PR adds the inline sRGB decode for video textures back to the engine (meaning it reverts #25752).

We can reconsider the usage of SRGB8_ALPHA8 for video textures when the browser issues are going to be fixed.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

Filesize dev	Filesize PR	Diff
645.2 kB (159.9 kB)	646 kB (160.2 kB)	+793 B

🌳 Bundle size after tree-shaking

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

Filesize dev	Filesize PR	Diff
438.3 kB (106 kB)	439.1 kB (106.3 kB)	+795 B

[Mugen87]

This PR also fixed a memory leak in Firefox, see #26527.

Browser devs should really revisit their SRGB8_ALPHA8 implementation. Webkit, Chromium and Firefox all have issues at the moment 😞 .

[danrossi]

Confirmed I can leave the texture as

texture.colorSpace = SRGBColorSpace;

[Mugen87]

You definitely need this line otherwise there is no sRGB decode.

[joaomelorodrigues]

With this line of code on my react three fiber app, this seriously affects FPS in android. Not iOS nor desktop.

[Mugen87]

You might have to wait until r156 is released.