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/*
* Copyright (C) 2011 Google 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 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 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.
*/
#ifndef WebContentLayerClient_h
#define WebContentLayerClient_h
#include "WebCommon.h"
namespace gfx {
class Rect;
}
namespace blink {
struct WebRect;
class WebDisplayItemList;
class BLINK_PLATFORM_EXPORT WebContentLayerClient {
public:
enum PaintingControlSetting {
// Returns the last PaintArtifact produced.
PaintDefaultBehavior,
// Paints the content to simulate the behavior of FrameView::synchronizedPaint.
PaintDefaultBehaviorForTest,
DisplayListConstructionDisabled,
DisplayListCachingDisabled,
DisplayListPaintingDisabled,
SubsequenceCachingDisabled
};
// The paintable region is the rectangular region, within the bounds of the layer
// this client paints, that the client is capable of painting via paintContents().
// Calling paintContents will return a WebDisplayitemList that is guaranteed valid
// only within this region.
// In particular, this is used to represent the interest rect in Blink.
virtual gfx::Rect paintableRegion() = 0;
// Paints the content area for the layer, typically dirty rects submitted
// through WebContentLayer::setNeedsDisplayInRect, submitting drawing commands
// to populate the WebDisplayItemList.
// The |PaintingControlSetting| enum controls painting to isolate different components in performance tests.
// Currently the DisplayListConstructionDisabled does nothing.
virtual void paintContents(
WebDisplayItemList*,
PaintingControlSetting = PaintDefaultBehavior) = 0;
// Returns an estimate of the current memory usage within this object,
// excluding memory shared with painting artifacts (i.e.,
// WebDisplayItemList). Should be invoked after paintContents, so that the
// result includes data cached internally during painting.
virtual size_t approximateUnsharedMemoryUsage() const { return 0; }
protected:
virtual ~WebContentLayerClient() { }
};
} // namespace blink
#endif // WebContentLayerClient_h
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