chromium/third_party/blink/renderer/core/loader/resource/image_resource_content.h

// Copyright 2016 The Chromium Authors
// 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_CORE_LOADER_RESOURCE_IMAGE_RESOURCE_CONTENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_RESOURCE_IMAGE_RESOURCE_CONTENT_H_

#include <cstddef>

#include "base/auto_reset.h"
#include "base/dcheck_is_on.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/loader/resource/image_resource_observer.h"
#include "third_party/blink/renderer/platform/graphics/image.h"
#include "third_party/blink/renderer/platform/graphics/image_observer.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_counted_set.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/image-decoders/image_decoder.h"
#include "third_party/blink/renderer/platform/loader/fetch/media_timing.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_status.h"
#include "ui/gfx/geometry/size.h"

namespace base {
class TimeTicks;
}

namespace blink {

class FetchParameters;
class ImageResourceInfo;
class KURL;
class ResourceError;
class ResourceFetcher;
class ResourceResponse;
class UseCounter;
enum RespectImageOrientationEnum : uint8_t;
struct ResourcePriority;

// ImageResourceContent is a container that holds fetch result of
// an ImageResource in a decoded form.
// Classes that use the fetched images
// should hold onto this class and/or inherit ImageResourceObserver,
// instead of holding onto ImageResource or inheriting ResourceClient.
// https://docs.google.com/document/d/1O-fB83mrE0B_V8gzXNqHgmRLCvstTB4MMi3RnVLr8bE/edit?usp=sharing
// TODO(hiroshige): Make ImageResourceContent ResourceClient and remove the
// word 'observer' from ImageResource.
class CORE_EXPORT ImageResourceContent final
    : public GarbageCollected<ImageResourceContent>,
      public ImageObserver,
      public MediaTiming { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_RESOURCE_IMAGE_RESOURCE_CONTENT_H_