WebGLTextures: Prevent flipping image bitmaps.

[Mugen87]

Fixed #16144.

Description

There is an edge case in WebGLTextures that currently does not work as expected. Image bitmaps might be resized when they exceed the maximum texture size of a device. In this case, they end up as an canvas image. If that happens, image bitmaps might be unexpectedly flipped because certain gl.pixelStorei() calls now have an effect which are normally ignored with image bitmaps. The PR makes sure to never set UNPACK_FLIP_Y_WEBGL, UNPACK_PREMULTIPLY_ALPHA_WEBGL and UNPACK_COLORSPACE_CONVERSION_WEBGL when the input is ImageBitmap because these configuration parameters must be specified when loading/crearting the image bitmap via setOptions(), see:

https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#the-imagebitmap-interface

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	359.49 85.34	359.57 85.37	+75 B +26 B
WebGPU	626.57 174.15	626.57 174.15	+0 B +0 B
WebGPU Nodes	625.15 173.9	625.15 173.9	+0 B +0 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	491.23 119.75	491.31 119.78	+75 B +35 B
WebGPU	700.2 189.15	700.2 189.15	+0 B +0 B
WebGPU Nodes	649.41 176.51	649.41 176.51	+0 B +0 B