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1 /* |
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2 * Copyright 2012 Google Inc. |
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3 * |
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4 * Use of this source code is governed by a BSD-style license that can be |
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5 * found in the LICENSE file. |
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6 */ |
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7 #ifndef SkPathOpsLine_DEFINED |
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8 #define SkPathOpsLine_DEFINED |
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9 |
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10 #include "SkPathOpsPoint.h" |
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11 |
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12 struct SkDLine { |
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13 SkDPoint fPts[2]; |
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14 |
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15 const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; } |
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16 SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; } |
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17 |
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18 void set(const SkPoint pts[2]) { |
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19 fPts[0] = pts[0]; |
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20 fPts[1] = pts[1]; |
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21 } |
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22 |
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23 static SkDLine SubDivide(const SkPoint a[2], double t1, double t2) { |
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24 SkDLine line; |
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25 line.set(a); |
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26 return line.subDivide(t1, t2); |
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27 } |
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28 |
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29 double exactPoint(const SkDPoint& xy) const; |
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30 static double ExactPointH(const SkDPoint& xy, double left, double right, double y); |
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31 static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x); |
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32 double isLeft(const SkDPoint& pt) const; |
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33 double nearPoint(const SkDPoint& xy) const; |
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34 bool nearRay(const SkDPoint& xy) const; |
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35 static double NearPointH(const SkDPoint& xy, double left, double right, double y); |
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36 static double NearPointV(const SkDPoint& xy, double top, double bottom, double x); |
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37 static bool NearRay(double dx1, double dy1, double dx2, double dy2); |
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38 SkDPoint ptAtT(double t) const; |
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39 SkDLine subDivide(double t1, double t2) const; |
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40 |
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41 #ifdef SK_DEBUG |
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42 void dump(); |
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43 #endif |
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44 private: |
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45 SkDVector tangent() const { return fPts[0] - fPts[1]; } |
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46 }; |
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47 |
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48 #endif |