skia2/experimental/svg/model/SkSVGValue.h
fmalita 6ceef3dd67 Initial SVG model
A minimal subset needed to render tiger.svg: <svg>, <g>, <path>, 'd', 'fill'/'stroke' (color-only), 'transform'.

R=reed@google.com,robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2164193002

Review-Url: https://codereview.chromium.org/2164193002
2016-07-26 18:46:34 -07:00

60 lines
1.3 KiB
C++

/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSVGValue_DEFINED
#define SkSVGValue_DEFINED
#include "SkColor.h"
#include "SkMatrix.h"
#include "SkPath.h"
#include "SkTypes.h"
class SkSVGValue : public SkNoncopyable {
public:
enum class Type {
Color,
Path,
Transform,
};
Type type() const { return fType; }
template <typename T>
const T* as() const {
return fType == T::TYPE ? static_cast<const T*>(this) : nullptr;
}
protected:
SkSVGValue(Type t) : fType(t) { }
private:
Type fType;
};
template <typename SkiaType, SkSVGValue::Type ValueType>
class SkSVGWrapperValue final : public SkSVGValue {
public:
static constexpr Type TYPE = ValueType;
explicit SkSVGWrapperValue(const SkiaType& v)
: INHERITED(ValueType)
, fWrappedValue(v) { }
operator const SkiaType&() const { return fWrappedValue; }
private:
SkiaType fWrappedValue;
using INHERITED = SkSVGValue;
};
using SkSVGColorValue = SkSVGWrapperValue<SkColor , SkSVGValue::Type::Color >;
using SkSVGPathValue = SkSVGWrapperValue<SkPath , SkSVGValue::Type::Path >;
using SkSVGTransformValue = SkSVGWrapperValue<SkMatrix, SkSVGValue::Type::Transform>;
#endif // SkSVGValue_DEFINED