Function renderTSL

renderTSL(
    shaderName: string,
    opts?: { native?: boolean; uniforms?: Readonly<Record<string, number>> },
): Promise<
    {
        pixels: Uint8Array;
        vertexShader: string;
        fragmentShader: string;
        meshPickMembershipOnly: boolean;
    },
>
Render the TSL path of a registered shader via WebGPURenderer (WebGL backend by default; real WebGPU with { native: true }) and return both the readback pixels and the generated shader strings.

Capturing the GLSL strings requires walking the WebGLBackend's pipeline cache after the render completes — there's no public "give me the source" API, so we read the strings off the NodeBuilderState that the backend stashes per-RenderObject.
Parameters
- shaderName: string
- opts: { native?: boolean; uniforms?: Readonly<Record<string, number>> } = {}
Returns Promise<
    {
        pixels: Uint8Array;
        vertexShader: string;
        fragmentShader: string;
        meshPickMembershipOnly: boolean;
    },
>
- Defined in src/tests/e2e/harnesses/tsl-harness/render.ts:550