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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_ANIMATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_ANIMATOR_H_
#include "third_party/blink/renderer/modules/animationworklet/effect_proxy.h"
#include "third_party/blink/renderer/platform/bindings/name_client.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_member.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/graphics/animation_worklet_mutators_state.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
#include "v8/include/v8.h"
namespace blink {
class AnimatorDefinition;
class ScriptState;
// Represents an animator instance. It owns the underlying |v8::Object| for the
// instance and knows how to invoke the |animate| function on it.
// See also |AnimationWorkletGlobalScope::CreateInstance|.
class Animator final : public GarbageCollectedFinalized<Animator>,
public NameClient {
public:
Animator(v8::Isolate*, AnimatorDefinition*, v8::Local<v8::Value> instance);
~Animator();
void Trace(blink::Visitor*);
const char* NameInHeapSnapshot() const override { return "Animator"; }
// Returns true if it successfully invoked animate callback in JS. It receives
// latest state coming from |AnimationHost| as input and fills
// the output state with new updates.
bool Animate(ScriptState*,
double current_time,
AnimationWorkletDispatcherOutput::AnimationState*);
base::Optional<TimeDelta> GetLastLocalTime() const {
return effect_->local_time();
}
private:
// This object keeps the definition object, and animator instance alive.
// It participates in wrapper tracing as it holds onto V8 wrappers.
TraceWrapperMember<AnimatorDefinition> definition_;
TraceWrapperV8Reference<v8::Value> instance_;
Member<EffectProxy> effect_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_ANIMATOR_H_
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