[SVGDom] Add opacity support

experimental/svg/model/SkSVGDOM.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 "SkCanvas.h"
 #include "SkDOM.h"
 #include "SkParsePath.h"
@@ skipping 199 matching lines @@
 struct AttrParseInfo {
     SkSVGAttribute fAttr;
     bool (*fSetter)(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr, const char* stringValue);
 };
 
 SortedDictionaryEntry<AttrParseInfo> gAttributeParseInfo[] = {
     { "d"              , { SkSVGAttribute::kD             , SetPathDataAttribute  }},
     { "fill"           , { SkSVGAttribute::kFill          , SetPaintAttribute     }},
     { "fill-opacity"   , { SkSVGAttribute::kFillOpacity   , SetNumberAttribute    }},
     { "height"         , { SkSVGAttribute::kHeight        , SetLengthAttribute    }},
+    { "opacity"        , { SkSVGAttribute::kOpacity       , SetNumberAttribute    }},
     { "points"         , { SkSVGAttribute::kPoints        , SetPointsAttribute    }},
     { "rx"             , { SkSVGAttribute::kRx            , SetLengthAttribute    }},
     { "ry"             , { SkSVGAttribute::kRy            , SetLengthAttribute    }},
     { "stroke"         , { SkSVGAttribute::kStroke        , SetPaintAttribute     }},
     { "stroke-linecap" , { SkSVGAttribute::kStrokeLineCap , SetLineCapAttribute   }},
     { "stroke-linejoin", { SkSVGAttribute::kStrokeLineJoin, SetLineJoinAttribute  }},
     { "stroke-opacity" , { SkSVGAttribute::kStrokeOpacity , SetNumberAttribute    }},
     { "stroke-width"   , { SkSVGAttribute::kStrokeWidth   , SetLengthAttribute    }},
     { "style"          , { SkSVGAttribute::kUnknown       , SetStyleAttributes    }},
     { "transform"      , { SkSVGAttribute::kTransform     , SetTransformAttribute }},
@@ skipping 122 matching lines @@
 }
 
 void SkSVGDOM::setContainerSize(const SkSize& containerSize) {
     // TODO: inval
     fContainerSize = containerSize;
 }
 
 void SkSVGDOM::setRoot(sk_sp<SkSVGNode> root) {
     fRoot = std::move(root);
 }