Function computeEffectiveRenderSize

computeEffectiveRenderSize(
    renderSize: RenderSize,
    ssaaEnabled: boolean,
    ssaaMultiplier: number,
): RenderSize
Compute the effective render-target size given current SSAA settings.

When SSAA is enabled, the off-screen render target runs at ssaaMultiplier × the screen size in each axis (the post-processing stack samples and downsamples back to the screen size). When SSAA is disabled, the on-screen size is used directly. Width and height are rounded to integers in both cases — render targets must be integral.
Parameters
- renderSize: RenderSize
  The on-screen render size in pixels.
- ssaaEnabled: boolean
  Whether SSAA is currently on.
- ssaaMultiplier: number
  The SSAA upscale factor (e.g. 1.5, 2, 4). Ignored when ssaaEnabled is false.
Returns RenderSize
Integer { width, height } for the off-screen render target.
- Defined in src/rendering/post-processing/render-target-sizing.ts:42