In GrDrawVerticesOp, don't allow CPU xform with perspective matrices

This causes the other attributes (colors and local coords) to be
interpolated incorrectly.

Bug: skia:10069
Change-Id: I90e926bed564f9c39375ba1ce0c27073f97a0875
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/278320
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed