Bug 1812970 - Avoid using Skia's deprecated clip ops. r=jrmuizel
Skia upstream removed deprecated clip ops that could be used to replace
the clipping stack and bypass clips. We shouldn't really need to do this
anymore, as we can work around it just using public APIs.
The only SkCanvas operation that allows us to bypass clipping is
writePixels, which still allows us to implement CopySurface/putImageData.
Other instances where we were using the replace op for DrawTargetWebgl
layering support can just be worked around by creating a separate
DrawTargetSkia pointing to the same pixel data, but on which no clipping
or transforms are applied so that we can freely do drawing operations
on it to the base layer pixel data regardless of any user-applied clipping.
Differential Revision:
https://phabricator.services.mozilla.com/D168039
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_dom_SessionStoreScrollData_h
#define mozilla_dom_SessionStoreScrollData_h
#include "js/TypeDecls.h"
#include "mozilla/WeakPtr.h"
#include "nsPoint.h"
#include "nsTArray.h"
#include "nsWrapperCache.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/SessionStoreChangeListener.h"
namespace mozilla::dom {
class BrowsingContext;
class WindowGlobalParent;
class OwningByteStringOrObjectOrNull;
struct SessionStoreZoomData;
using SessionStoreZoom = mozilla::Tuple<float, uint32_t, uint32_t>;
using MaybeSessionStoreZoom =
mozilla::Maybe<mozilla::Tuple<float, uint32_t, uint32_t>>;
class SessionStoreScrollData final : public nsISupports,
public nsWrapperCache,
public SupportsWeakPtr {
public:
using CollectedType = nsPoint;
using LocationType = WeakPtr<SessionStoreScrollData>;
using ChildrenArray = nsTArray<RefPtr<SessionStoreScrollData>>;
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(SessionStoreScrollData)
nsISupports* GetParentObject() const;
JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
void GetScroll(nsACString& aScroll) const;
ChildrenArray& Children();
void GetChildren(Nullable<ChildrenArray>& aChildren) const;
void ToJSON(JSContext* aCx, JS::MutableHandle<JSObject*> aRetval);
void Update(const CollectedType& aUpdate);
void ClearCachedChildren();
static bool HasData(const CollectedType& aPoint);
bool IsEmpty() const;
private:
~SessionStoreScrollData() = default;
nsPoint mScroll;
MaybeSessionStoreZoom mZoom;
nsTArray<RefPtr<SessionStoreScrollData>> mChildren;
};
} // namespace mozilla::dom
#endif // mozilla_dom_SessionStoreScrollData_h
