Based on ideas discussed to solve bug 1633912, this patch implements allows each shader to switch between no-perspective and perspective on a per-primitive basis based on whether or not the primitive's W coordinates all match. This should be sufficient stop-gap for now to unblock testing and development.
Bug 1634447 Comment 0 Edit History
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Based on ideas discussed to solve bug 1633912, this patch implements allowing each shader to switch between no-perspective and perspective on per-primitive based on whether or not the primitive's W coordinates all match. This should be a sufficient stop-gap for now to unblock testing and development. Performance and memory usage costs of this approach will need to be evaluated before we decide whether to keep it long term.