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/*
Copyright (C) 2001-2003 KSVG Team
This file is part of the KDE project
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 SVGMaskElementImpl_H
#define SVGMaskElementImpl_H
#include <tqwmatrix.h>
#include "SVGTestsImpl.h"
#include "SVGBBoxTarget.h"
#include "SVGElementImpl.h"
#include "SVGStylableImpl.h"
#include "SVGLangSpaceImpl.h"
#include "SVGExternalResourcesRequiredImpl.h"
#include "LRUCache.h"
#include "ksvg_lookup.h"
namespace KSVG
{
class SVGUnitConverter;
class KSVGCanvas;
class SVGShapeImpl;
class SVGRectImpl;
class SVGAnimatedLengthImpl;
class SVGAnimatedEnumerationImpl;
class SVGMaskElementImpl : public SVGElementImpl,
public SVGTestsImpl,
public SVGLangSpaceImpl,
public SVGExternalResourcesRequiredImpl,
public SVGStylableImpl,
public SVGBBoxTarget
{
public:
class Mask
{
public:
Mask() : m_width(0), m_height(0) {}
Mask(const TQByteArray& mask, const TQWMatrix& screenToMask, int width, int height);
~Mask() {}
bool isEmpty() const { return m_width == 0; }
unsigned char value(int screenX, int screenY) const;
TQByteArray rectangle(int screenX, int screenY, int width, int height);
TQByteArray rectangle(const TQRect& rect);
void setScreenToMask(const TQWMatrix& matrix) { m_screenToMask = matrix; }
private:
int m_width;
int m_height;
TQByteArray m_mask;
TQWMatrix m_screenToMask;
};
SVGMaskElementImpl(DOM::ElementImpl *);
virtual ~SVGMaskElementImpl();
SVGAnimatedEnumerationImpl *maskUnits() const;
SVGAnimatedEnumerationImpl *maskContentUnits() const;
SVGAnimatedLengthImpl *x() const;
SVGAnimatedLengthImpl *y() const;
SVGAnimatedLengthImpl *width() const;
SVGAnimatedLengthImpl *height() const;
virtual SVGRectImpl *getBBox();
virtual void setAttributes();
SVGUnitConverter *converter() const { return m_converter; }
Mask createMask(SVGShapeImpl *referencingElement);
// Compute the mask on a given shape, taking into account all masks defined
// on the shape's ancestors. This is a workaround for us not having a buffer
// for container elements, so we can't mask containers directly.
static TQByteArray maskRectangle(SVGShapeImpl *shape, const TQRect& screenRectangle);
private:
class CacheKey
{
public:
CacheKey() : m_element(0), m_width(0), m_height(0) {}
CacheKey(SVGElementImpl *element, int width, int height) : m_element(element), m_width(width), m_height(height) {}
bool operator==(const CacheKey& other) const { return m_element == other.m_element && m_width == other.m_width && m_height == other.m_height; }
private:
SVGElementImpl *m_element;
int m_width;
int m_height;
};
Mask createMask(SVGShapeImpl *referencingElement, int imageWidth, int imageHeight);
SVGAnimatedEnumerationImpl *m_maskUnits;
SVGAnimatedEnumerationImpl *m_maskContentUnits;
SVGAnimatedLengthImpl *m_x;
SVGAnimatedLengthImpl *m_y;
SVGAnimatedLengthImpl *m_width;
SVGAnimatedLengthImpl *m_height;
SVGUnitConverter *m_converter;
KSVGCanvas *m_canvas;
MinOneLRUCache<CacheKey, Mask> m_maskCache;
public:
KSVG_GET
KSVG_PUT
KSVG_BRIDGE
enum
{
// Properties
MaskUnits, MaskContentUnits, X, Y, Width, Height
};
KJS::Value getValueProperty(KJS::ExecState *exec, int token) const;
void putValueProperty(KJS::ExecState *exec, int token, const KJS::Value &value, int attr);
};
KSVG_REGISTER_ELEMENT(SVGMaskElementImpl, "mask")
inline unsigned char SVGMaskElementImpl::Mask::value(int screenX, int screenY) const
{
int x, y;
m_screenToMask.map(screenX, screenY, &x, &y);
if(x >= 0 && x < m_width && y >= 0 && y < m_height)
return m_mask[x + y * m_width];
else
return 0;
}
}
#endif
// vim:ts=4:noet
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