kc3-lang/angle

2018-01-31T14:49:24

D3D9: Improve varying packing failure mode. D3D9 has a special limitation on varying packing, where each variable takes up a full register width, and cannot share space with other packed varyings. A bug was counting registers incorrectly on D3D9. Fix this by introducing a new limitation exposed to the ANGLE front-end via the gl::Limitations structure. Now varying packing will fail correctly in the ANGLE linking front-end with a more descriptive error message, as such: "Could not pack varying blah" "Note: Additional non-conformant packing restrictions are enforced on D3D9." Also change the packing so that input built-in variables are counted towards varying limits (e.g. gl_PointSize), except for gl_Position. On D3D9 we don't pack gl_PointSize, since it is used in a special extra PSIZE register. Also update some tests to be more robust. Bug: chromium:804799 Change-Id: I9027266a8b66a28626f038f259bff42ebf09dcd2 Reviewed-on: https://chromium-review.googlesource.com/889898 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>