tree bd0c9c93f832a9730abf7602846f4ade85ff0f29
parent af4a3a998449cb389b607a8b541bf585587667c3
author Alexis Hetu <sugoi@google.com> 1610737401 -0500
committer swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com <swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com> 1610751529 +0000

Fix crash in vertex shader when position is not declared

It is legal for a shader to not declare BuiltInPosition.
This cl adds logic to use 0 for all position components
when the position builtin is not present and then keeps
executing the rest of the shader normally.

Bug: b/176161380
Change-Id: I1b4637b813d3d30958e2db655d299603d625c20a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/51808
Commit-Queue: Alexis Hétu <sugoi@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>