VectorKeyframeAnimator.h

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/*
 * Copyright 2020 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef SkottieVectorKeyframeAnimator_DEFINED
#define SkottieVectorKeyframeAnimator_DEFINED
 
#include "include/core/SkRefCnt.h"
#include "modules/skottie/src/animator/KeyframeAnimator.h"
 
#include <cstddef>
#include <vector>
 
namespace skjson {
class ArrayValue;
class ObjectValue;
class Value;
}  // namespace skjson
 
namespace skottie {
class ExpressionManager;
}
 
namespace skottie::internal {
class AnimationBuilder;
class Animator;
 
class VectorAnimatorBuilder final : public AnimatorBuilder {
public:
    using VectorLenParser  = bool(*)(const skjson::Value&, size_t*);
    using VectorDataParser = bool(*)(const skjson::Value&, size_t, float*);
 
    VectorAnimatorBuilder(std::vector<float>*, VectorLenParser, VectorDataParser);
 
    sk_sp<KeyframeAnimator> makeFromKeyframes(const AnimationBuilder&,
                                              const skjson::ArrayValue&) override;
 
    sk_sp<Animator> makeFromExpression(ExpressionManager&, const char*) override;
 
private:
    bool parseValue(const AnimationBuilder&, const skjson::Value&) const override;
 
    bool parseKFValue(const AnimationBuilder&,
                      const skjson::ObjectValue&,
                      const skjson::Value&,
                      Keyframe::Value*) override;
 
    const VectorLenParser  fParseLen;
    const VectorDataParser fParseData;
 
    std::vector<float>     fStorage;
    size_t                 fVecLen,         // size of individual vector values we store
                           fCurrentVec = 0; // vector value index being parsed (corresponding
                                            // storage offset is fCurrentVec * fVecLen)
    std::vector<float>*    fTarget;
 
    using INHERITED = AnimatorBuilder;
};
 
} // namespace skottie::internal
 
#endif // SkottieVectorKeyframeAnimator_DEFINED