Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/Path.h

-/*
- * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
- *               2006 Rob Buis <buis@kde.org>
- * Copyright (C) 2007-2008 Torch Mobile, Inc.
- * Copyright (C) 2013 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 COMPUTER, 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 COMPUTER, 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 "platform/geometry/RoundedRect.h"
-#include "platform/graphics/WindRule.h"
-#include "third_party/skia/include/core/SkPath.h"
-#include "wtf/FastAllocBase.h"
-#include "wtf/Forward.h"
-
-class SkPath;
-
-namespace WebCore {
-
-class AffineTransform;
-class FloatPoint;
-class FloatRect;
-class FloatSize;
-class GraphicsContext;
-class StrokeData;
-
-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 sturcture 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 void (*PathApplierFunction)(void* info, const PathElement*);
-
-class Path {
-    WTF_MAKE_FAST_ALLOCATED;
-public:
-    Path();
-    ~Path();
-
-    Path(const Path&);
-    Path& operator=(const Path&);
-    bool operator==(const Path&) const;
-
-    bool contains(const FloatPoint&, WindRule = RULE_NONZERO) const;
-    bool strokeContains(const FloatPoint&, const StrokeData&) const;
-    FloatRect boundingRect() const;
-    FloatRect strokeBoundingRect(const StrokeData&) const;
-
-    float length() const;
-    FloatPoint pointAtLength(float length, bool& ok) const;
-    float normalAngleAtLength(float length, bool& ok) const;
-    bool pointAndNormalAtLength(float length, FloatPoint&, float&) const;
-
-    void clear();
-    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;
-
-    WindRule windRule() const;
-    void setWindRule(const WindRule);
-
-    void moveTo(const FloatPoint&);
-    void addLineTo(const FloatPoint&);
-    void addQuadCurveTo(const FloatPoint& controlPoint, const FloatPoint& endPoint);
-    void addBezierCurveTo(const FloatPoint& controlPoint1, const FloatPoint& controlPoint2, const FloatPoint& endPoint);
-    void addArcTo(const FloatPoint&, const FloatPoint&, float radius);
-    void closeSubpath();
-
-    void addArc(const FloatPoint&, float radius, float startAngle, float endAngle, bool anticlockwise);
-    void addRect(const FloatRect&);
-    void addEllipse(const FloatPoint&, float radiusX, float radiusY, float rotation, float startAngle, float endAngle, bool anticlockwise);
-    void addEllipse(const FloatRect&);
-
-    void addRoundedRect(const FloatRect&, const FloatSize& roundingRadii);
-    void addRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
-    void addRoundedRect(const RoundedRect&);
-
-    void translate(const FloatSize&);
-
-    const SkPath& skPath() const { return m_path; }
-
-    void apply(void* info, PathApplierFunction) const;
-    void transform(const AffineTransform&);
-
-    void addPathForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
-    void addBeziersForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
-
-    // Updates the path to the union (inclusive-or) of itself with the given argument.
-    bool unionPath(const Path& other);
-
-private:
-    void addEllipse(const FloatPoint&, float radiusX, float radiusY, float startAngle, float endAngle, bool anticlockwise);
-
-    SkPath m_path;
-};
-
-}
-
-#endif