SkPdf: smaller color serialization

src/pdf/SkPDFTypes.cpp

Index: src/pdf/SkPDFTypes.cpp
diff --git a/src/pdf/SkPDFTypes.cpp b/src/pdf/SkPDFTypes.cpp
index f9ab5e492a26396ea0731e71e39acb44ff4d621d..8c59a4a0085c1da9b0ca918457937e8ea2cfb37f 100644
--- a/src/pdf/SkPDFTypes.cpp
+++ b/src/pdf/SkPDFTypes.cpp
@@ -118,6 +118,9 @@ void SkPDFUnion::emitObject(SkWStream* stream,
         case Type::kInt:
             stream->writeDecAsText(fIntValue);
             return;
+        case Type::kColorComponent:
+            SkPDFUtils::AppendColorComponent(SkToU8(fIntValue), stream);
+            return;
         case Type::kBool:
             stream->writeText(fBoolValue ? "true" : "false");
             return;
@@ -159,6 +162,7 @@ void SkPDFUnion::addResources(SkPDFObjNumMap* objNumMap,
                               const SkPDFSubstituteMap& substituteMap) const {
     switch (fType) {
         case Type::kInt:
+        case Type::kColorComponent:
         case Type::kBool:
         case Type::kScalar:
         case Type::kName:
@@ -185,6 +189,12 @@ SkPDFUnion SkPDFUnion::Int(int32_t value) {
     return u;
 }
 
+SkPDFUnion SkPDFUnion::ColorComponent(uint8_t value) {
+    SkPDFUnion u(Type::kColorComponent);
+    u.fIntValue = value;
+    return u;
+}
+
 SkPDFUnion SkPDFUnion::Bool(bool value) {
     SkPDFUnion u(Type::kBool);
     u.fBoolValue = value;
@@ -300,6 +310,10 @@ void SkPDFArray::appendInt(int32_t value) {
     this->append(SkPDFUnion::Int(value));
 }
 
+void SkPDFArray::appendColorComponent(uint8_t value) {
+    this->append(SkPDFUnion::ColorComponent(value));
+}
+
 void SkPDFArray::appendBool(bool value) {
     this->append(SkPDFUnion::Bool(value));
 }