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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.
#include "base/callback.h"
#include "base/optional.h"
#include "cc/paint/decoded_draw_image.h"
#include "cc/paint/draw_image.h"
#include "cc/paint/paint_export.h"
#include <vector>
namespace cc {
class PaintImage;
// Used to replace lazy generated PaintImages with decoded images for
// rasterization.
class CC_PAINT_EXPORT ImageProvider {
class CC_PAINT_EXPORT ScopedResult {
using DestructionCallback = base::OnceClosure;
explicit ScopedResult(DecodedDrawImage image);
ScopedResult(DecodedDrawImage image, DestructionCallback callback);
ScopedResult(const PaintRecord* record, DestructionCallback callback);
ScopedResult(const ScopedResult&) = delete;
ScopedResult(ScopedResult&& other);
ScopedResult& operator=(const ScopedResult&) = delete;
ScopedResult& operator=(ScopedResult&& other);
operator bool() const { return image_ || record_; }
const DecodedDrawImage& decoded_image() const { return image_; }
bool needs_unlock() const { return !destruction_callback_.is_null(); }
const PaintRecord* paint_record() {
return record_;
void DestroyDecode();
DecodedDrawImage image_;
const PaintRecord* record_ = nullptr;
DestructionCallback destruction_callback_;
virtual ~ImageProvider() {}
// Returns either:
// 1. The DecodedDrawImage to use for this PaintImage. If no image is
// provided, the draw for this image will be skipped during raster. Or,
// 2. The PaintRecord produced by paint worklet JS paint callback.
virtual ScopedResult GetRasterContent(const DrawImage& draw_image) = 0;
} // namespace cc