Add SkColor4f serialization

src/core/SkReadBuffer.cpp

Index: src/core/SkReadBuffer.cpp
diff --git a/src/core/SkReadBuffer.cpp b/src/core/SkReadBuffer.cpp
index 4b9d5987a173607c8d530d44400f7398165f2897..7465e308185b3d40c51909759ba6cab1db5dacf1 100644
--- a/src/core/SkReadBuffer.cpp
+++ b/src/core/SkReadBuffer.cpp
@@ -142,6 +142,14 @@ void SkReadBuffer::readString(SkString* string) {
     string->set(strContents, len);
 }
 
+static_assert(SK_SCALAR_IS_FLOAT, "Color4f serialization needs updating");
+void SkReadBuffer::readColor4f(SkColor4f* color) {

[reed1, 2016/09/13 23:17:03]

Is this any simpler/more-efficient?

memcpy(color, fReader.skip(sizeof(SkColor4f)), sizeof(SkColor4f));

We use this pattern for rects, irects etc.

+    color->fR = fReader.readScalar();
+    color->fG = fReader.readScalar();
+    color->fB = fReader.readScalar();
+    color->fA = fReader.readScalar();
+}
+
 void SkReadBuffer::readPoint(SkPoint* point) {
     point->fX = fReader.readScalar();
     point->fY = fReader.readScalar();
@@ -192,6 +200,10 @@ bool SkReadBuffer::readColorArray(SkColor* colors, size_t size) {
     return readArray(colors, size, sizeof(SkColor));
 }
 
+bool SkReadBuffer::readColor4fArray(SkColor4f* colors, size_t size) {
+    return readArray(colors, size, sizeof(SkColor4f));
+}
+
 bool SkReadBuffer::readIntArray(int32_t* values, size_t size) {
     return readArray(values, size, sizeof(int32_t));
 }