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/*
Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005 Rob Buis <buis@kde.org>
2005 Eric Seidel <eric@webkit.org>
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
aint 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 FEComponentTransfer_h
#define FEComponentTransfer_h
#if ENABLE(FILTERS)
#include "FilterEffect.h"
#include "Filter.h"
#include <wtf/Vector.h>
namespace WebCore {
enum ComponentTransferType {
FECOMPONENTTRANSFER_TYPE_UNKNOWN = 0,
FECOMPONENTTRANSFER_TYPE_IDENTITY = 1,
FECOMPONENTTRANSFER_TYPE_TABLE = 2,
FECOMPONENTTRANSFER_TYPE_DISCRETE = 3,
FECOMPONENTTRANSFER_TYPE_LINEAR = 4,
FECOMPONENTTRANSFER_TYPE_GAMMA = 5
};
struct ComponentTransferFunction {
ComponentTransferFunction()
: type(FECOMPONENTTRANSFER_TYPE_UNKNOWN)
, slope(0.0f)
, intercept(0.0f)
, amplitude(0.0f)
, exponent(0.0f)
, offset(0.0f)
{
}
ComponentTransferType type;
float slope;
float intercept;
float amplitude;
float exponent;
float offset;
Vector<float> tableValues;
};
class FEComponentTransfer : public FilterEffect {
public:
static PassRefPtr<FEComponentTransfer> create(const ComponentTransferFunction&,
const ComponentTransferFunction&, const ComponentTransferFunction&, const ComponentTransferFunction&);
ComponentTransferFunction redFunction() const;
void setRedFunction(const ComponentTransferFunction&);
ComponentTransferFunction greenFunction() const;
void setGreenFunction(const ComponentTransferFunction&);
ComponentTransferFunction blueFunction() const;
void setBlueFunction(const ComponentTransferFunction&);
ComponentTransferFunction alphaFunction() const;
void setAlphaFunction(const ComponentTransferFunction&);
void apply(Filter*);
void dump();
TextStream& externalRepresentation(TextStream&, int indent) const;
private:
FEComponentTransfer(const ComponentTransferFunction&, const ComponentTransferFunction&,
const ComponentTransferFunction&, const ComponentTransferFunction&);
ComponentTransferFunction m_redFunc;
ComponentTransferFunction m_greenFunc;
ComponentTransferFunction m_blueFunc;
ComponentTransferFunction m_alphaFunc;
};
} // namespace WebCore
#endif // ENABLE(FILTERS)
#endif // FEComponentTransfer_h
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