Use texStorage + texSubImage instead of texImage

[dmnsgn]

Best practice for WebGL2 is texStorage + texSubImage.

texStorage has some limitations:

• size and format cannot be changed after first call
• but it is more performant to store/update

texImage (current):

• easy to work with because it handles memory allocation and data upload in one call

We currently use texImage but texStorage for texture 2D Array.

We could either:

• creation: texImage + update: check for width/height/format/type change to either texImage or if no change texSubImage
• creation: texStorage + update: same state diff and choose texStorage/texSubImage
• creation: texImage + update: same state diff + choose texStorage/texSubImage storage as an texture option ctx.texture2D({ ...bla, storage: true }) (like WebGPU usage maybe?)

Related:

• our pex-renderer post-pro pipeline recycle textures