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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2009 The Android Open Source Project | 3 * Copyright 2009 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkEdgeClipper_DEFINED | 10 #ifndef SkEdgeClipper_DEFINED |
11 #define SkEdgeClipper_DEFINED | 11 #define SkEdgeClipper_DEFINED |
12 | 12 |
13 #include "SkPath.h" | 13 #include "SkPath.h" |
14 | 14 |
15 /** This is basically an iterator. It is initialized with an edge and a clip, | 15 /** This is basically an iterator. It is initialized with an edge and a clip, |
16 and then next() is called until it returns kDone_Verb. | 16 and then next() is called until it returns kDone_Verb. |
17 */ | 17 */ |
18 class SkEdgeClipper { | 18 class SkEdgeClipper { |
19 public: | 19 public: |
| 20 SkEdgeClipper(bool canCullToTheRight) : fCanCullToTheRight(canCullToTheRight
) {} |
| 21 |
20 bool clipQuad(const SkPoint pts[3], const SkRect& clip); | 22 bool clipQuad(const SkPoint pts[3], const SkRect& clip); |
21 bool clipCubic(const SkPoint pts[4], const SkRect& clip); | 23 bool clipCubic(const SkPoint pts[4], const SkRect& clip); |
22 | 24 |
23 SkPath::Verb next(SkPoint pts[]); | 25 SkPath::Verb next(SkPoint pts[]); |
24 | 26 |
| 27 bool canCullToTheRight() const { return fCanCullToTheRight; } |
| 28 |
25 private: | 29 private: |
26 SkPoint* fCurrPoint; | 30 SkPoint* fCurrPoint; |
27 SkPath::Verb* fCurrVerb; | 31 SkPath::Verb* fCurrVerb; |
| 32 const bool fCanCullToTheRight; |
28 | 33 |
29 enum { | 34 enum { |
30 kMaxVerbs = 13, | 35 kMaxVerbs = 13, |
31 kMaxPoints = 32 | 36 kMaxPoints = 32 |
32 }; | 37 }; |
33 SkPoint fPoints[kMaxPoints]; | 38 SkPoint fPoints[kMaxPoints]; |
34 SkPath::Verb fVerbs[kMaxVerbs]; | 39 SkPath::Verb fVerbs[kMaxVerbs]; |
35 | 40 |
36 void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip); | 41 void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip); |
37 void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip); | 42 void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip); |
38 void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse); | 43 void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse); |
39 void appendQuad(const SkPoint pts[3], bool reverse); | 44 void appendQuad(const SkPoint pts[3], bool reverse); |
40 void appendCubic(const SkPoint pts[4], bool reverse); | 45 void appendCubic(const SkPoint pts[4], bool reverse); |
41 }; | 46 }; |
42 | 47 |
43 #ifdef SK_DEBUG | 48 #ifdef SK_DEBUG |
44 void sk_assert_monotonic_x(const SkPoint pts[], int count); | 49 void sk_assert_monotonic_x(const SkPoint pts[], int count); |
45 void sk_assert_monotonic_y(const SkPoint pts[], int count); | 50 void sk_assert_monotonic_y(const SkPoint pts[], int count); |
46 #else | 51 #else |
47 #define sk_assert_monotonic_x(pts, count) | 52 #define sk_assert_monotonic_x(pts, count) |
48 #define sk_assert_monotonic_y(pts, count) | 53 #define sk_assert_monotonic_y(pts, count) |
49 #endif | 54 #endif |
50 | 55 |
51 #endif | 56 #endif |
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