merge key() and CanBuild() into CacheKey()
We can unify these similar functions to reduce the amount of work we do
and guarantee SkShaderBase::program() is never called with a null
skvm::Builder*. We now only call program() to do real work: one call to
get a shader key, and if no program is found in the cache, one more call
to build the blitter program. No null checks are needed any longer.
Cq-Include-Trybots: skia.primary:Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-All-SK_USE_SKVM_BLITTER
Change-Id: I6e73d9d264690f04ddcc92e6f7b3c42654f8a41c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/252759
Reviewed-by: Mike Klein <mtklein@google.com>
4 files changed