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/*
* Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
* 2006 Rob Buis <buis@kde.org>
* Copyright (C) 2007-2008 Torch Mobile, Inc.
*
* 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. ``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
* 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 Path_h
#define Path_h
#include "FloatRect.h"
#include "WindRule.h"
#include <functional>
#include <wtf/FastMalloc.h>
#include <wtf/Forward.h>
#include <wtf/Vector.h>
#if USE(CG)
#include <wtf/RetainPtr.h>
#include <CoreGraphics/CGPath.h>
typedef struct CGPath PlatformPath;
#elif PLATFORM(QT)
#include <qpainterpath.h>
typedef QPainterPath PlatformPath;
#elif USE(CAIRO)
namespace WebCore {
class CairoPath;
}
typedef WebCore::CairoPath PlatformPath;
#elif USE(WINGDI)
namespace WebCore {
class PlatformPath;
}
typedef WebCore::PlatformPath PlatformPath;
#else
typedef void PlatformPath;
#endif
#if PLATFORM(QT)
/* QPainterPath is valued based */
typedef PlatformPath PlatformPathPtr;
#else
typedef PlatformPath* PlatformPathPtr;
#endif
namespace WebCore {
class AffineTransform;
class FloatPoint;
class FloatRoundedRect;
class FloatSize;
class GraphicsContext;
class PathTraversalState;
class RoundedRect;
class StrokeStyleApplier;
class TextStream;
enum PathElementType {
PathElementMoveToPoint, // The points member will contain 1 value.
PathElementAddLineToPoint, // The points member will contain 1 value.
PathElementAddQuadCurveToPoint, // The points member will contain 2 values.
PathElementAddCurveToPoint, // The points member will contain 3 values.
PathElementCloseSubpath // The points member will contain no values.
};
// The points in the structure are the same as those that would be used with the
// add... method. For example, a line returns the endpoint, while a cubic returns
// two tangent points and the endpoint.
struct PathElement {
PathElementType type;
FloatPoint* points;
};
typedef std::function<void (const PathElement&)> PathApplierFunction;
class Path {
WTF_MAKE_FAST_ALLOCATED;
public:
WEBCORE_EXPORT Path();
#if USE(CG)
Path(RetainPtr<CGMutablePathRef>);
#endif
WEBCORE_EXPORT ~Path();
WEBCORE_EXPORT Path(const Path&);
WEBCORE_EXPORT Path& operator=(const Path&);
static Path polygonPathFromPoints(const Vector<FloatPoint>&);
bool contains(const FloatPoint&, WindRule rule = RULE_NONZERO) const;
bool strokeContains(StrokeStyleApplier*, const FloatPoint&) const;
// fastBoundingRect() should equal or contain boundingRect(); boundingRect()
// should perfectly bound the points within the path.
FloatRect boundingRect() const;
FloatRect fastBoundingRect() const;
FloatRect strokeBoundingRect(StrokeStyleApplier* = 0) const;
float length() const;
PathTraversalState traversalStateAtLength(float length, bool& success) const;
FloatPoint pointAtLength(float length, bool& success) const;
float normalAngleAtLength(float length, bool& success) const;
WEBCORE_EXPORT void clear();
#if PLATFORM(QT)
bool isNull() const { return false; }
#else
bool isNull() const { return !m_path; }
#endif
bool isEmpty() const;
// Gets the current point of the current path, which is conceptually the final point reached by the path so far.
// Note the Path can be empty (isEmpty() == true) and still have a current point.
bool hasCurrentPoint() const;
FloatPoint currentPoint() const;
WEBCORE_EXPORT void moveTo(const FloatPoint&);
WEBCORE_EXPORT void addLineTo(const FloatPoint&);
WEBCORE_EXPORT void addQuadCurveTo(const FloatPoint& controlPoint, const FloatPoint& endPoint);
WEBCORE_EXPORT void addBezierCurveTo(const FloatPoint& controlPoint1, const FloatPoint& controlPoint2, const FloatPoint& endPoint);
void addArcTo(const FloatPoint&, const FloatPoint&, float radius);
WEBCORE_EXPORT void closeSubpath();
void addArc(const FloatPoint&, float radius, float startAngle, float endAngle, bool anticlockwise);
void addRect(const FloatRect&);
void addEllipse(FloatPoint, float radiusX, float radiusY, float rotation, float startAngle, float endAngle, bool anticlockwise);
void addEllipse(const FloatRect&);
enum RoundedRectStrategy {
PreferNativeRoundedRect,
PreferBezierRoundedRect
};
WEBCORE_EXPORT void addRoundedRect(const FloatRect&, const FloatSize& roundingRadii, RoundedRectStrategy = PreferNativeRoundedRect);
WEBCORE_EXPORT void addRoundedRect(const FloatRoundedRect&, RoundedRectStrategy = PreferNativeRoundedRect);
void addRoundedRect(const RoundedRect&);
void addPath(const Path&, const AffineTransform&);
void translate(const FloatSize&);
// To keep Path() cheap, it does not allocate a PlatformPath immediately
// meaning Path::platformPath() can return null (except on Qt).
PlatformPathPtr platformPath() const { return m_path; }
#if PLATFORM(QT)
PlatformPathPtr ensurePlatformPath() { return platformPath(); }
#else
// ensurePlatformPath() will allocate a PlatformPath if it has not yet been and will never return null.
WEBCORE_EXPORT PlatformPathPtr ensurePlatformPath();
#endif
WEBCORE_EXPORT void apply(const PathApplierFunction&) const;
void transform(const AffineTransform&);
void addBeziersForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
#if USE(CG)
void platformAddPathForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
#endif
#ifndef NDEBUG
void dump() const;
#endif
private:
PlatformPathPtr m_path;
};
TextStream& operator<<(TextStream&, const Path&);
}
#endif
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