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/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <WebCore/Color.h>
#include <WebCore/IntPoint.h>
#include <WebCore/SecurityOriginData.h>
#include <wtf/ListHashSet.h>
#include <wtf/Noncopyable.h>
#include <wtf/text/WTFString.h>
#if HAVE(IOSURFACE)
#include <WebCore/IOSurface.h>
#endif
#if PLATFORM(GTK)
#if USE(GTK4)
#include <gtk/gtk.h>
#else
#include <WebCore/RefPtrCairo.h>
#endif
#endif
namespace WebKit {
class WebBackForwardListItem;
class WebPageProxy;
class ViewSnapshot : public RefCounted<ViewSnapshot> {
public:
#if HAVE(IOSURFACE)
static Ref<ViewSnapshot> create(std::unique_ptr<WebCore::IOSurface>);
#endif
#if PLATFORM(GTK)
#if USE(GTK4)
static Ref<ViewSnapshot> create(GRefPtr<GdkTexture>&&);
#else
static Ref<ViewSnapshot> create(RefPtr<cairo_surface_t>&&);
#endif
#endif
~ViewSnapshot();
void clearImage();
bool hasImage() const;
#if HAVE(IOSURFACE)
id asLayerContents();
RetainPtr<CGImageRef> asImageForTesting();
#endif
void setRenderTreeSize(uint64_t renderTreeSize) { m_renderTreeSize = renderTreeSize; }
uint64_t renderTreeSize() const { return m_renderTreeSize; }
void setBackgroundColor(const WebCore::Color& color) { m_backgroundColor = color; }
WebCore::Color backgroundColor() const { return m_backgroundColor; }
void setViewScrollPosition(WebCore::IntPoint scrollPosition) { m_viewScrollPosition = scrollPosition; }
WebCore::IntPoint viewScrollPosition() const { return m_viewScrollPosition; }
void setDeviceScaleFactor(float deviceScaleFactor) { m_deviceScaleFactor = deviceScaleFactor; }
float deviceScaleFactor() const { return m_deviceScaleFactor; }
void setOrigin(WebCore::SecurityOriginData&& origin) { m_origin = WTFMove(origin); }
const WebCore::SecurityOriginData& origin() const { return m_origin; }
#if HAVE(IOSURFACE)
WebCore::IOSurface* surface() const { return m_surface.get(); }
size_t estimatedImageSizeInBytes() const { return m_surface ? m_surface->totalBytes() : 0; }
WebCore::IntSize size() const { return m_surface ? m_surface->size() : WebCore::IntSize(); }
void setSurface(std::unique_ptr<WebCore::IOSurface>);
WebCore::SetNonVolatileResult setVolatile(bool);
#endif
#if PLATFORM(GTK)
#if USE(GTK4)
GdkTexture* texture() const { return m_texture.get(); }
#else
cairo_surface_t* surface() const { return m_surface.get(); }
#endif
size_t estimatedImageSizeInBytes() const;
WebCore::IntSize size() const;
#endif
private:
#if HAVE(IOSURFACE)
explicit ViewSnapshot(std::unique_ptr<WebCore::IOSurface>);
std::unique_ptr<WebCore::IOSurface> m_surface;
#endif
#if PLATFORM(GTK)
#if USE(GTK4)
explicit ViewSnapshot(GRefPtr<GdkTexture>&&);
GRefPtr<GdkTexture> m_texture;
#else
explicit ViewSnapshot(RefPtr<cairo_surface_t>&&);
RefPtr<cairo_surface_t> m_surface;
#endif
#endif
uint64_t m_renderTreeSize;
float m_deviceScaleFactor;
WebCore::Color m_backgroundColor;
WebCore::IntPoint m_viewScrollPosition; // Scroll position at snapshot time. Integral to make comparison reliable.
WebCore::SecurityOriginData m_origin;
};
class ViewSnapshotStore {
WTF_MAKE_NONCOPYABLE(ViewSnapshotStore);
friend class ViewSnapshot;
public:
ViewSnapshotStore();
~ViewSnapshotStore();
static ViewSnapshotStore& singleton();
void recordSnapshot(WebPageProxy&, WebBackForwardListItem&);
void discardSnapshotImages();
void discardSnapshotImagesForOrigin(const WebCore::SecurityOriginData&);
void setDisableSnapshotVolatilityForTesting(bool disable) { m_disableSnapshotVolatility = disable; }
bool disableSnapshotVolatilityForTesting() const { return m_disableSnapshotVolatility; }
private:
void didAddImageToSnapshot(ViewSnapshot&);
void willRemoveImageFromSnapshot(ViewSnapshot&);
void pruneSnapshots(WebPageProxy&);
size_t m_snapshotCacheSize { 0 };
ListHashSet<ViewSnapshot*> m_snapshotsWithImages;
bool m_disableSnapshotVolatility { false };
};
} // namespace WebKit
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