expand unitests for color4f

src/core/SkColor.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkFixed.h"
@@ skipping 86 matching lines @@
         case 3: r = p; g = q; b = v; break;
         case 4: r = t;  g = p; b = v; break;
         default: r = v; g = p; b = q; break;
     }
     return SkColorSetARGB(a, r, g, b);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 #include "SkNx.h"
 
-SkColor4f SkColor4f::Pin(float a, float r, float g, float b) {
-    SkColor4f c4;
-    Sk4f::Min(Sk4f::Max(Sk4f(a, r, g, b), Sk4f(0)), Sk4f(1)).store(c4.vec());
+SkPM4f SkPM4f::FromPMColor(SkPMColor c) {
+    Sk4f value = SkNx_cast<float>(Sk4b::Load((const uint8_t*)&c));
+    SkPM4f c4;
+    (value * Sk4f(1.0f / 255)).store(c4.fVec);
     return c4;
 }
 
 SkColor4f SkColor4f::FromColor(SkColor c) {
     Sk4f value = SkNx_shuffle<3,2,1,0>(SkNx_cast<float>(Sk4b::Load((const uint8_t*)&c)));
     SkColor4f c4;
     (value * Sk4f(1.0f / 255)).store(c4.vec());
     return c4;
 }
 
+SkColor4f SkColor4f::Pin(float a, float r, float g, float b) {
+    SkColor4f c4;
+    Sk4f::Min(Sk4f::Max(Sk4f(a, r, g, b), Sk4f(0)), Sk4f(1)).store(c4.vec());
+    return c4;
+}
+
 SkPM4f SkColor4f::premul() const {
     auto src = Sk4f::Load(this->pin().vec());
     float srcAlpha = src.kth<0>();  // need the pinned version of our alpha
     src = src * Sk4f(1, srcAlpha, srcAlpha, srcAlpha);
 
 #ifdef SK_PMCOLOR_IS_BGRA
     // ARGB -> BGRA
     Sk4f dst = SkNx_shuffle<3,2,1,0>(src);
 #else
     // ARGB -> RGBA
     Sk4f dst = SkNx_shuffle<1,2,3,0>(src);
 #endif
 
     SkPM4f pm4;
     dst.store(pm4.fVec);
     return pm4;
 }