experiment: float color components

include/core/SkColor.h

Index: include/core/SkColor.h
diff --git a/include/core/SkColor.h b/include/core/SkColor.h
index 1ba1331c1a7261f3faaba32002dc113ac9ed0397..0f233b7662ee01ccff25e96064daa7e8c3056be4 100644
--- a/include/core/SkColor.h
+++ b/include/core/SkColor.h
@@ -160,4 +160,10 @@ SK_API SkPMColor SkPreMultiplyColor(SkColor c);
 */
 typedef SkPMColor (*SkXfermodeProc)(SkPMColor src, SkPMColor dst);
 
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+struct SkPM4f {
+    float fVec[4];

[mtklein, 2016/01/21 17:52:36]

To be super-sweet,

struct SK_ATTRIBUTE(aligned(16)) SkPM4f {
   ...
};

This will make sure the floats are aligned when you put them on the stack.
(This is often guaranteed anyway, depending on the OS + CPU architecture.)

+};
+
 #endif