/*
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef SourceAlpha_h
#define SourceAlpha_h
#include "platform/graphics/filters/Filter.h"
#include "platform/graphics/filters/FilterEffect.h"
namespace WebCore {
class PLATFORM_EXPORT SourceAlpha : public FilterEffect {
public:
static PassRefPtr<SourceAlpha> create(Filter*);
static const AtomicString& effectName();
virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) OVERRIDE;
virtual FilterEffectType filterEffectType() const OVERRIDE { return FilterEffectTypeSourceInput; }
virtual TextStream& externalRepresentation(TextStream&, int indention) const OVERRIDE;
virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) OVERRIDE;
private:
SourceAlpha(Filter* filter)
: FilterEffect(filter)
{
}
virtual void applySoftware() OVERRIDE;
};
} // namespace WebCore
#endif // SourceAlpha_h