chromium / external / skia / 24044fd8fbc7c8eab684fc93b5c4e92719308fdd / . / include / pathops / SkPathOps.h

/* | |

* Copyright 2012 Google Inc. | |

* | |

* Use of this source code is governed by a BSD-style license that can be | |

* found in the LICENSE file. | |

*/ | |

#ifndef SkPathOps_DEFINED | |

#define SkPathOps_DEFINED | |

#include "SkPreConfig.h" | |

class SkPath; | |

// FIXME: move everything below into the SkPath class | |

/** | |

* The logical operations that can be performed when combining two paths. | |

*/ | |

enum SkPathOp { | |

kDifference_PathOp, //!< subtract the op path from the first path | |

kIntersect_PathOp, //!< intersect the two paths | |

kUnion_PathOp, //!< union (inclusive-or) the two paths | |

kXOR_PathOp, //!< exclusive-or the two paths | |

kReverseDifference_PathOp, //!< subtract the first path from the op path | |

}; | |

/** Set this path to the result of applying the Op to this path and the | |

specified path: this = (this op operand). | |

The resulting path will be constructed from non-overlapping contours. | |

The curve order is reduced where possible so that cubics may be turned | |

into quadratics, and quadratics maybe turned into lines. | |

Returns true if operation was able to produce a result; | |

otherwise, result is unmodified. | |

@param one The first operand (for difference, the minuend) | |

@param two The second operand (for difference, the subtrahend) | |

@param result The product of the operands. The result may be one of the | |

inputs. | |

@return True if operation succeeded. | |

*/ | |

bool SK_API Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result); | |

/** Set this path to a set of non-overlapping contours that describe the | |

same area as the original path. | |

The curve order is reduced where possible so that cubics may | |

be turned into quadratics, and quadratics maybe turned into lines. | |

Returns true if operation was able to produce a result; | |

otherwise, result is unmodified. | |

@param path The path to simplify. | |

@param result The simplified path. The result may be the input. | |

@return True if simplification succeeded. | |

*/ | |

bool SK_API Simplify(const SkPath& path, SkPath* result); | |

#endif |