Cache the inverse matrix on SkColorSpace. Rename xyz() to toXYZ().

include/core/SkColorSpace.h

Index: include/core/SkColorSpace.h
diff --git a/include/core/SkColorSpace.h b/include/core/SkColorSpace.h
index 045117552626b55373074c6fa3c94d3b02295c9e..d5a3dfcf4a49a1501c0418c003d5e0dcbfaa1172 100644
--- a/include/core/SkColorSpace.h
+++ b/include/core/SkColorSpace.h
@@ -66,7 +66,7 @@ public:
     /**
      *  Returns the matrix used to transform src gamut to XYZ D50.
      */
-    const SkMatrix44& xyz() const { return fToXYZD50; }
+    const SkMatrix44& toXYZ() const { return fToXYZD50; }

[mtklein, 2016/09/08 15:04:36]

You may want to keep an alias xyz() to stage updating the name in Chrome.

[msarett, 2016/09/08 15:06:07]

Now that you've done all this typing, do you think it should be "toXYZD50" and
"fromXYZD50"?  I don't feel strongly, just asking.

 
     /**
      *  Returns true if the color space gamma is near enough to be approximated as sRGB.