fuchsia / third_party / cairo / 8ec60535cdde3c8ff990351efdcba55bb31f0167 / . / src / cairo-slope-private.h

/* cairo - a vector graphics library with display and print output | |

* | |

* Copyright © 2002 University of Southern California | |

* Copyright © 2005 Red Hat, Inc. | |

* | |

* This library is free software; you can redistribute it and/or | |

* modify it either under the terms of the GNU Lesser General Public | |

* License version 2.1 as published by the Free Software Foundation | |

* (the "LGPL") or, at your option, under the terms of the Mozilla | |

* Public License Version 1.1 (the "MPL"). If you do not alter this | |

* notice, a recipient may use your version of this file under either | |

* the MPL or the LGPL. | |

* | |

* You should have received a copy of the LGPL along with this library | |

* in the file COPYING-LGPL-2.1; if not, write to the Free Software | |

* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA | |

* You should have received a copy of the MPL along with this library | |

* in the file COPYING-MPL-1.1 | |

* | |

* The contents of this file are subject to the Mozilla Public License | |

* Version 1.1 (the "License"); you may not use this file except in | |

* compliance with the License. You may obtain a copy of the License at | |

* http://www.mozilla.org/MPL/ | |

* | |

* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY | |

* OF ANY KIND, either express or implied. See the LGPL or the MPL for | |

* the specific language governing rights and limitations. | |

* | |

* The Original Code is the cairo graphics library. | |

* | |

* The Initial Developer of the Original Code is University of Southern | |

* California. | |

* | |

* Contributor(s): | |

* Carl D. Worth <cworth@cworth.org> | |

*/ | |

#ifndef _CAIRO_SLOPE_PRIVATE_H | |

#define _CAIRO_SLOPE_PRIVATE_H | |

#include "cairo-types-private.h" | |

#include "cairo-fixed-private.h" | |

static inline void | |

_cairo_slope_init (cairo_slope_t *slope, | |

const cairo_point_t *a, | |

const cairo_point_t *b) | |

{ | |

slope->dx = b->x - a->x; | |

slope->dy = b->y - a->y; | |

} | |

static inline cairo_bool_t | |

_cairo_slope_equal (const cairo_slope_t *a, const cairo_slope_t *b) | |

{ | |

return _cairo_int64_eq (_cairo_int32x32_64_mul (a->dy, b->dx), | |

_cairo_int32x32_64_mul (b->dy, a->dx)); | |

} | |

static inline cairo_bool_t | |

_cairo_slope_backwards (const cairo_slope_t *a, const cairo_slope_t *b) | |

{ | |

return _cairo_int64_negative (_cairo_int64_add (_cairo_int32x32_64_mul (a->dx, b->dx), | |

_cairo_int32x32_64_mul (a->dy, b->dy))); | |

} | |

cairo_private int | |

_cairo_slope_compare (const cairo_slope_t *a, | |

const cairo_slope_t *b) cairo_pure; | |

#endif /* _CAIRO_SLOPE_PRIVATE_H */ |