WebGPURenderer: WebGL fallback - fix scissor with MSAA

[aardgoose]

Combining multiple renderpasses and scissoring with msaa can result in invalid framebuffer contents being used.

This is illustrated by the webgpu_textures_anisotropy example using the WebGL fallback renderer.

Apply the scissor coordinates to the framebuffer blit and invalidation operations.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

Filesize dev	Filesize PR	Diff
685.4 kB (169.7 kB)	685.4 kB (169.7 kB)	+0 B

🌳 Bundle size after tree-shaking

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

Filesize dev	Filesize PR	Diff
462 kB (111.4 kB)	462 kB (111.4 kB)	+0 B

[Mugen87]

The CI still seems to complain about the screenshot. I suggest you put the example on the exception list if a regeneration does not work. I'll revisit the exceptions at a later point.