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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #include "SkOpEdgeBuilder.h" | 7 #include "SkOpEdgeBuilder.h" |
8 #include "SkReduceOrder.h" | 8 #include "SkReduceOrder.h" |
9 | 9 |
10 void SkOpEdgeBuilder::init() { | 10 void SkOpEdgeBuilder::init() { |
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71 } | 71 } |
72 | 72 |
73 void SkOpEdgeBuilder::walk() { | 73 void SkOpEdgeBuilder::walk() { |
74 SkPath::Verb reducedVerb; | 74 SkPath::Verb reducedVerb; |
75 uint8_t* verbPtr = fPathVerbs.begin(); | 75 uint8_t* verbPtr = fPathVerbs.begin(); |
76 uint8_t* endOfFirstHalf = &verbPtr[fSecondHalf]; | 76 uint8_t* endOfFirstHalf = &verbPtr[fSecondHalf]; |
77 const SkPoint* pointsPtr = fPathPts.begin(); | 77 const SkPoint* pointsPtr = fPathPts.begin(); |
78 const SkPoint* finalCurveStart = NULL; | 78 const SkPoint* finalCurveStart = NULL; |
79 const SkPoint* finalCurveEnd = NULL; | 79 const SkPoint* finalCurveEnd = NULL; |
80 SkPath::Verb verb; | 80 SkPath::Verb verb; |
81 while ((verb = (SkPath::Verb) *verbPtr++) != SkPath::kDone_Verb) { | 81 while ((verb = (SkPath::Verb) *verbPtr) != SkPath::kDone_Verb) { |
| 82 if (verbPtr == endOfFirstHalf) { |
| 83 fOperand = true; |
| 84 } |
| 85 verbPtr++; |
82 switch (verb) { | 86 switch (verb) { |
83 case SkPath::kMove_Verb: | 87 case SkPath::kMove_Verb: |
84 complete(); | 88 complete(); |
85 if (!fCurrentContour) { | 89 if (!fCurrentContour) { |
86 fCurrentContour = fContours.push_back_n(1); | 90 fCurrentContour = fContours.push_back_n(1); |
87 fCurrentContour->setOperand(fOperand); | 91 fCurrentContour->setOperand(fOperand); |
88 fCurrentContour->setXor(fXorMask[fOperand] == kEvenOdd_PathO
psMask); | 92 fCurrentContour->setXor(fXorMask[fOperand] == kEvenOdd_PathO
psMask); |
89 *fExtra.append() = -1; // start new contour | 93 *fExtra.append() = -1; // start new contour |
90 } | 94 } |
91 finalCurveEnd = pointsPtr++; | 95 finalCurveEnd = pointsPtr++; |
92 goto nextVerb; | 96 continue; |
93 case SkPath::kLine_Verb: | 97 case SkPath::kLine_Verb: |
94 // skip degenerate points | 98 // skip degenerate points |
95 if (pointsPtr[-1].fX != pointsPtr[0].fX || pointsPtr[-1].fY != p
ointsPtr[0].fY) { | 99 if (pointsPtr[-1].fX != pointsPtr[0].fX || pointsPtr[-1].fY != p
ointsPtr[0].fY) { |
96 fCurrentContour->addLine(&pointsPtr[-1]); | 100 fCurrentContour->addLine(&pointsPtr[-1]); |
97 } | 101 } |
98 break; | 102 break; |
99 case SkPath::kQuad_Verb: | 103 case SkPath::kQuad_Verb: |
100 reducedVerb = SkReduceOrder::Quad(&pointsPtr[-1], &fReducePts); | 104 reducedVerb = SkReduceOrder::Quad(&pointsPtr[-1], &fReducePts); |
101 if (reducedVerb == 0) { | 105 if (reducedVerb == 0) { |
102 break; // skip degenerate points | 106 break; // skip degenerate points |
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125 break; | 129 break; |
126 case SkPath::kClose_Verb: | 130 case SkPath::kClose_Verb: |
127 SkASSERT(fCurrentContour); | 131 SkASSERT(fCurrentContour); |
128 if (finalCurveStart && finalCurveEnd | 132 if (finalCurveStart && finalCurveEnd |
129 && *finalCurveStart != *finalCurveEnd) { | 133 && *finalCurveStart != *finalCurveEnd) { |
130 *fReducePts.append() = *finalCurveStart; | 134 *fReducePts.append() = *finalCurveStart; |
131 *fReducePts.append() = *finalCurveEnd; | 135 *fReducePts.append() = *finalCurveEnd; |
132 *fExtra.append() = fCurrentContour->addLine(fReducePts.end()
- 2); | 136 *fExtra.append() = fCurrentContour->addLine(fReducePts.end()
- 2); |
133 } | 137 } |
134 complete(); | 138 complete(); |
135 goto nextVerb; | 139 continue; |
136 default: | 140 default: |
137 SkDEBUGFAIL("bad verb"); | 141 SkDEBUGFAIL("bad verb"); |
138 return; | 142 return; |
139 } | 143 } |
140 finalCurveStart = &pointsPtr[verb - 1]; | 144 finalCurveStart = &pointsPtr[verb - 1]; |
141 pointsPtr += verb; | 145 pointsPtr += verb; |
142 SkASSERT(fCurrentContour); | 146 SkASSERT(fCurrentContour); |
143 nextVerb: | |
144 if (verbPtr == endOfFirstHalf) { | |
145 fOperand = true; | |
146 } | |
147 } | 147 } |
148 } | 148 } |
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