1/*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef Sk2DPathEffect_DEFINED
9#define Sk2DPathEffect_DEFINED
10
11#include "SkPath.h"
12#include "SkPathEffect.h"
13#include "SkMatrix.h"
14
15class SK_API Sk2DPathEffect : public SkPathEffect {
16public:
17    virtual bool filterPath(SkPath*, const SkPath&, SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
18
19    SK_DECLARE_UNFLATTENABLE_OBJECT()
20
21protected:
22    /** New virtual, to be overridden by subclasses.
23        This is called once from filterPath, and provides the
24        uv parameter bounds for the path. Subsequent calls to
25        next() will receive u and v values within these bounds,
26        and then a call to end() will signal the end of processing.
27    */
28    virtual void begin(const SkIRect& uvBounds, SkPath* dst) const;
29    virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) const;
30    virtual void end(SkPath* dst) const;
31
32    /** Low-level virtual called per span of locations in the u-direction.
33        The default implementation calls next() repeatedly with each
34        location.
35    */
36    virtual void nextSpan(int u, int v, int ucount, SkPath* dst) const;
37
38    const SkMatrix& getMatrix() const { return fMatrix; }
39
40    // protected so that subclasses can call this during unflattening
41    explicit Sk2DPathEffect(const SkMatrix& mat);
42#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
43    explicit Sk2DPathEffect(SkReadBuffer&);
44#endif
45    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
46
47private:
48    SkMatrix    fMatrix, fInverse;
49    bool        fMatrixIsInvertible;
50
51    // illegal
52    Sk2DPathEffect(const Sk2DPathEffect&);
53    Sk2DPathEffect& operator=(const Sk2DPathEffect&);
54
55    friend class Sk2DPathEffectBlitter;
56    typedef SkPathEffect INHERITED;
57};
58
59class SK_API SkLine2DPathEffect : public Sk2DPathEffect {
60public:
61    static SkLine2DPathEffect* Create(SkScalar width, const SkMatrix& matrix) {
62        return SkNEW_ARGS(SkLine2DPathEffect, (width, matrix));
63    }
64
65    virtual bool filterPath(SkPath* dst, const SkPath& src,
66                            SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
67
68    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLine2DPathEffect)
69
70protected:
71    SkLine2DPathEffect(SkScalar width, const SkMatrix& matrix)
72        : Sk2DPathEffect(matrix), fWidth(width) {}
73#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
74    explicit SkLine2DPathEffect(SkReadBuffer&);
75#endif
76
77    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
78
79    virtual void nextSpan(int u, int v, int ucount, SkPath*) const SK_OVERRIDE;
80
81private:
82    SkScalar fWidth;
83
84    typedef Sk2DPathEffect INHERITED;
85};
86
87class SK_API SkPath2DPathEffect : public Sk2DPathEffect {
88public:
89    /**
90     *  Stamp the specified path to fill the shape, using the matrix to define
91     *  the latice.
92     */
93    static SkPath2DPathEffect* Create(const SkMatrix& matrix, const SkPath& path) {
94        return SkNEW_ARGS(SkPath2DPathEffect, (matrix, path));
95    }
96
97    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath2DPathEffect)
98
99protected:
100    SkPath2DPathEffect(const SkMatrix&, const SkPath&);
101#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
102    explicit SkPath2DPathEffect(SkReadBuffer& buffer);
103#endif
104    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
105
106    virtual void next(const SkPoint&, int u, int v, SkPath*) const SK_OVERRIDE;
107
108private:
109    SkPath  fPath;
110
111    typedef Sk2DPathEffect INHERITED;
112};
113
114#endif
115