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skottie_wrapper.h
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skottie_wrapper.h
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// Copyright 2018 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 CC_PAINT_SKOTTIE_WRAPPER_H_
#define CC_PAINT_SKOTTIE_WRAPPER_H_
#include <memory>
#include "base/containers/span.h"
#include "base/memory/ref_counted.h"
#include "base/synchronization/lock.h"
#include "cc/paint/paint_export.h"
#include "third_party/skia/include/core/SkRect.h"
#include "third_party/skia/modules/skottie/include/Skottie.h"
class SkCanvas;
namespace cc {
// A wrapper over Skia's Skottie object that can be shared by multiple
// SkiaVectorAnimation objects. This class is thread safe when performing a draw
// on an SkCanvas.
class CC_PAINT_EXPORT SkottieWrapper
: public base::RefCountedThreadSafe<SkottieWrapper> {
public:
// Creates an instance that can be serialized for IPC. This uses additional
// memory to store the raw animation data.
static scoped_refptr<SkottieWrapper> CreateSerializable(
std::vector<uint8_t> data);
// Creates a non serializable instance of the class. This uses less memory.
static scoped_refptr<SkottieWrapper> CreateNonSerializable(
base::span<const uint8_t> data);
SkottieWrapper(const SkottieWrapper&) = delete;
SkottieWrapper& operator=(const SkottieWrapper&) = delete;
// Returns true if the |animation_| object initialized is a valid skottie
// animation.
bool is_valid() const { return !!animation_; }
// A thread safe call that will draw an image with bounds |rect| for the
// frame at normalized time instant |t| onto the |canvas|.
void Draw(SkCanvas* canvas, float t, const SkRect& rect);
float duration() const { return animation_->duration(); }
SkSize size() const { return animation_->size(); }
base::span<const uint8_t> raw_data() const;
uint32_t id() const { return id_; }
private:
friend class base::RefCountedThreadSafe<SkottieWrapper>;
explicit SkottieWrapper(base::span<const uint8_t> data);
explicit SkottieWrapper(std::vector<uint8_t> data);
~SkottieWrapper();
base::Lock lock_;
sk_sp<skottie::Animation> animation_;
// The raw byte data is stored for serialization across OOP-R. This is only
// valid if serialization was enabled at construction.
const std::vector<uint8_t> raw_data_;
// Unique id generated for a given animation. This will be unique per
// animation file. 2 animation objects from the same source file will have the
// same value.
const uint32_t id_;
};
} // namespace cc
#endif // CC_PAINT_SKOTTIE_WRAPPER_H_