Gradients are serialized (and can be constructed) as SkColor4f + SkColorSpace

src/effects/gradients/SkTwoPointConicalGradient.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTwoPointConicalGradient.h"
 
 struct TwoPtRadialContext {
@@ skipping 300 matching lines @@
     }
     SkPoint c1 = buffer.readPoint();
     SkPoint c2 = buffer.readPoint();
     SkScalar r1 = buffer.readScalar();
     SkScalar r2 = buffer.readScalar();
 
     if (buffer.readBool()) {    // flipped
         SkTSwap(c1, c2);
         SkTSwap(r1, r2);
 
-        SkColor* colors = desc.mutableColors();
+        SkColor4f* colors = desc.mutableColors();
         SkScalar* pos = desc.mutablePos();
         const int last = desc.fCount - 1;
         const int half = desc.fCount >> 1;
         for (int i = 0; i < half; ++i) {
             SkTSwap(colors[i], colors[last - i]);
             if (pos) {
                 SkScalar tmp = pos[i];
                 pos[i] = SK_Scalar1 - pos[last - i];
                 pos[last - i] = SK_Scalar1 - tmp;
             }
         }
         if (pos) {
             if (desc.fCount & 1) {
                 pos[half] = SK_Scalar1 - pos[half];
             }
         }
     }
 
-    return SkGradientShader::MakeTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos,
+    return SkGradientShader::MakeTwoPointConical(c1, r1, c2, r2, desc.fColors,
+                                                 std::move(desc.fColorSpace), desc.fPos,
                                                  desc.fCount, desc.fTileMode, desc.fGradFlags,
                                                  desc.fLocalMatrix);
 }
 
 void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fCenter1);
     buffer.writePoint(fCenter2);
     buffer.writeScalar(fRadius1);
     buffer.writeScalar(fRadius2);
@@ skipping 37 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif