Enable legacy premuls in SkColorSpaceXform

***Will allow for simplified Android framework code, they typically
   want a color correct transform followed by a gamma encoded premul.
***Chrome does the same, so this will make it easier to replace their
   codecs.
***Will decrease code size.  Both types of premuls are moved off the
   fast path here - one is essentially unused in production and the
   other is not "encouraged".
***Will actually make the common case faster: sRGB->sRGB means no
   color xform, just premul in SkSwizzler.

BUG=skia:

CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD

Change-Id: Ia4ec1d273b6f137151f951d37c0ebf975f6b9a3e
Reviewed-on: https://skia-review.googlesource.com/8848
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Matt Sarett <msarett@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/core/SkColorSpace.cpp b/src/core/SkColorSpace.cpp
index b24a8d6777..399a1617cc 100644
--- a/src/core/SkColorSpace.cpp
+++ b/src/core/SkColorSpace.cpp
@@ -554,6 +554,11 @@ sk_sp<SkColorSpace> SkColorSpace::Deserialize(const void* data, size_t length) {
     }
 }
 
+bool SkColorSpace_Base::EqualsIgnoreFlags(SkColorSpace* src, SkColorSpace* dst) {
+    return SkColorSpace::Equals(as_CSB(src)->makeWithoutFlags().get(),
+                                as_CSB(dst)->makeWithoutFlags().get());
+}
+
 bool SkColorSpace::Equals(const SkColorSpace* src, const SkColorSpace* dst) {
     if (src == dst) {
         return true;