image/IProgressObserver.h
author Doug Thayer <dothayer@mozilla.com>
Wed, 02 May 2018 18:20:25 -0700
changeset 427223 984133e9614baa845a6dca7fc2cc6ca50cbb1687
parent 402771 62497967f092c6c76778ddc1534f110d4583eeb9
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1265824 - Pass the texture direct mapping info to all texture creating functions r=mattwoodrow The client side can't get the GL context in CompositorOGL. So, it can't know the texture direct mapping capability directly. This patch adds the texture direct mapping info in TextureFactoryIdentifier. Then, the client side could get the info form the TextureFactoryIdentifier. MozReview-Commit-ID: KEazDVg0p9Y

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_image_IProgressObserver_h
#define mozilla_image_IProgressObserver_h

#include "mozilla/WeakPtr.h"
#include "nsISupports.h"
#include "nsRect.h"

class nsIEventTarget;

namespace mozilla {
namespace image {

/**
 * An interface for observing changes to image state, as reported by
 * ProgressTracker.
 *
 * This is the ImageLib-internal version of imgINotificationObserver,
 * essentially, with implementation details that code outside of ImageLib
 * shouldn't see.
 *
 * XXX(seth): It's preferable to avoid adding anything to this interface if
 * possible.  In the long term, it would be ideal to get to a place where we can
 * just use the imgINotificationObserver interface internally as well.
 */
class IProgressObserver : public SupportsWeakPtr<IProgressObserver>
{
public:
  MOZ_DECLARE_WEAKREFERENCE_TYPENAME(IProgressObserver)

  // Subclasses may or may not be XPCOM classes, so we just require that they
  // implement AddRef and Release.
  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING

  // imgINotificationObserver methods:
  virtual void Notify(int32_t aType, const nsIntRect* aRect = nullptr) = 0;
  virtual void OnLoadComplete(bool aLastPart) = 0;

  // Other, internal-only methods:
  virtual void SetHasImage() = 0;
  virtual bool NotificationsDeferred() const = 0;
  virtual void MarkPendingNotify() = 0;
  virtual void ClearPendingNotify() = 0;

  virtual already_AddRefed<nsIEventTarget> GetEventTarget() const
  {
    return nullptr;
  }

protected:
  virtual ~IProgressObserver() { }
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_IProgressObserver_h