An LGPL/GPL-licensed artwork library
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

art_svp_intersect.h 2.0KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172
  1. /* Libart_LGPL - library of basic graphic primitives
  2. * Copyright (C) 2001 Raph Levien
  3. *
  4. * This library is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU Library General Public
  6. * License as published by the Free Software Foundation; either
  7. * version 2 of the License, or (at your option) any later version.
  8. *
  9. * This library is distributed in the hope that it will be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * Library General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU Library General Public
  15. * License along with this library; if not, write to the
  16. * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17. * Boston, MA 02111-1307, USA.
  18. */
  19. #ifndef __ART_SVP_INTERSECT_H__
  20. #define __ART_SVP_INTERSECT_H__
  21. /* The funky new SVP intersector. */
  22. #ifdef LIBART_COMPILATION
  23. #include "art_config.h"
  24. #include "art_svp.h"
  25. #else
  26. #include <libart_lgpl/art_config.h>
  27. #include <libart_lgpl/art_svp.h>
  28. #endif
  29. #ifdef __cplusplus
  30. extern "C" {
  31. #endif /* __cplusplus */
  32. #ifndef ART_WIND_RULE_DEFINED
  33. #define ART_WIND_RULE_DEFINED
  34. typedef enum {
  35. ART_WIND_RULE_NONZERO,
  36. ART_WIND_RULE_INTERSECT,
  37. ART_WIND_RULE_ODDEVEN,
  38. ART_WIND_RULE_POSITIVE
  39. } ArtWindRule;
  40. #endif
  41. typedef struct _ArtSvpWriter ArtSvpWriter;
  42. struct _ArtSvpWriter {
  43. int (*add_segment) (ArtSvpWriter *self, int wind_left, int delta_wind,
  44. double x, double y);
  45. void (*add_point) (ArtSvpWriter *self, int seg_id, double x, double y);
  46. void (*close_segment) (ArtSvpWriter *self, int seg_id);
  47. };
  48. LIBART_EXPORT ArtSvpWriter *
  49. art_svp_writer_rewind_new (ArtWindRule rule);
  50. LIBART_EXPORT ArtSVP *
  51. art_svp_writer_rewind_reap (ArtSvpWriter *self);
  52. LIBART_EXPORT int
  53. art_svp_seg_compare (const void *s1, const void *s2);
  54. LIBART_EXPORT void
  55. art_svp_intersector (const ArtSVP *in, ArtSvpWriter *out);
  56. #ifdef __cplusplus
  57. }
  58. #endif /* __cplusplus */
  59. #endif /* __ART_SVP_INTERSECT_H__ */