Commit 0c5409f863e52587a02c860c248e4a06e6ddd335
2015-07-08T15:17:53
Support constant folding of fragment processing built-ins This change adds constant folding support for following derivative functions: - dFdx, dFdy and fwidth. As per spec, derivatives of constant arguments should be 0, so this change just sets result components to zero when the above operations are performed on constant argument. BUG=angleproject:913 TEST=dEQP Tests dEQP-GLES3.functional.shaders.constant_expressions.builtin_functions. fragment_processing.* (All 12 tests started passing with this change.) Change-Id: I67b7c5abd970b740e15e3bd1ee56721e81bbecc4 Reviewed-on: https://chromium-review.googlesource.com/283759 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Tested-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>