Change SkColor4f to RGBA channel order

tests/SkColor4fTest.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkColor.h"
 #include "SkColorMatrixFilter.h"
@@ skipping 19 matching lines @@
         }
     }
     return true;
 }
 
 DEF_TEST(SkColor4f_FromColor, reporter) {
     const struct {
         SkColor     fC;
         SkColor4f   fC4;
     } recs[] = {
-        { SK_ColorBLACK, { 1, 0, 0, 0 } },
+        { SK_ColorBLACK, { 0, 0, 0, 1 } },
         { SK_ColorWHITE, { 1, 1, 1, 1 } },
-        { SK_ColorRED,   { 1, 1, 0, 0 } },
-        { SK_ColorGREEN, { 1, 0, 1, 0 } },
-        { SK_ColorBLUE,  { 1, 0, 0, 1 } },
+        { SK_ColorRED,   { 1, 0, 0, 1 } },
+        { SK_ColorGREEN, { 0, 1, 0, 1 } },
+        { SK_ColorBLUE,  { 0, 0, 1, 1 } },
         { 0,             { 0, 0, 0, 0 } },
-        { 0x55AAFF00,    { 1/3.0f, 2/3.0f, 1, 0 } },
+        { 0x55AAFF00,    { 2/3.0f, 1, 0, 1 / 3.0f } },
     };
 
     for (const auto& r : recs) {
         SkColor4f c4 = SkColor4f::FromColor(r.fC);
         REPORTER_ASSERT(reporter, c4 == r.fC4);
     }
 }
 
 DEF_TEST(Color4f_premul, reporter) {
     SkRandom rand;
 
     for (int i = 0; i < 1000000; ++i) {
         // First just test opaque colors, so that the premul should be exact
         SkColor4f c4 {
-            1, rand.nextUScalar1(), rand.nextUScalar1(), rand.nextUScalar1()
+            rand.nextUScalar1(), rand.nextUScalar1(), rand.nextUScalar1(), 1
         };
         SkPM4f pm4 = c4.premul();
         REPORTER_ASSERT(reporter, pm4.a() == c4.fA);
         REPORTER_ASSERT(reporter, pm4.r() == c4.fA * c4.fR);
         REPORTER_ASSERT(reporter, pm4.g() == c4.fA * c4.fG);
         REPORTER_ASSERT(reporter, pm4.b() == c4.fA * c4.fB);
 
         // We compare with a tolerance, in case our premul multiply is implemented at slightly
         // different precision than the test code.
         c4.fA = rand.nextUScalar1();
@@ skipping 169 matching lines @@
 //
 DEF_TEST(Color4f_xfermode_proc4f, reporter) {
     // TODO: extend xfermodes so that all cases can be tested.
     //
     for (int mode = SkXfermode::kClear_Mode; mode <= SkXfermode::kScreen_Mode; ++mode) {
         SkXfermodeProc   proc32 = SkXfermode::GetProc((SkXfermode::Mode)mode);
         SkXfermodeProc4f proc4f = SkXfermode::GetProc4f((SkXfermode::Mode)mode);
         REPORTER_ASSERT(reporter, compare_procs(proc32, proc4f));
     }
 }