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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2009 VMware, Inc.  All Rights Reserved.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * copy of this software and associated documentation files (the
  7.  * "Software"), to deal in the Software without restriction, including
  8.  * without limitation the rights to use, copy, modify, merge, publish,
  9.  * distribute, sub license, and/or sell copies of the Software, and to
  10.  * permit persons to whom the Software is furnished to do so, subject to
  11.  * the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the
  14.  * next paragraph) shall be included in all copies or substantial portions
  15.  * of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20.  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24.  *
  25.  **************************************************************************/
  26.  
  27. #ifndef ARC_H
  28. #define ARC_H
  29.  
  30. #include "VG/openvg.h"
  31.  
  32. struct polygon;
  33. struct matrix;
  34. struct stroker;
  35. struct path;
  36.  
  37. struct arc {
  38.    VGPathSegment type;
  39.  
  40.    VGfloat cx, cy;
  41.  
  42.    VGfloat a, b;
  43.  
  44.    VGfloat theta;
  45.    VGfloat cos_theta, sin_theta;
  46.  
  47.    VGfloat eta1;
  48.    VGfloat eta2;
  49.  
  50.    VGfloat x1, y1, x2, y2;
  51.  
  52.    VGboolean is_valid;
  53. };
  54.  
  55. void arc_init(struct arc *arc,
  56.               VGPathSegment type,
  57.               VGfloat x1, VGfloat y1,
  58.               VGfloat x2, VGfloat y2,
  59.               VGfloat rh, VGfloat rv,
  60.               VGfloat rot);
  61.  
  62. void arc_add_to_polygon(struct arc *arc,
  63.                         struct polygon *poly,
  64.                         struct matrix *matrix);
  65.  
  66.  
  67. void arc_to_path(struct arc *arc,
  68.                  struct path *p,
  69.                  struct matrix *matrix);
  70.  
  71. void arc_stroke_cb(struct arc *arc,
  72.                    struct stroker *stroke,
  73.                    struct matrix *matrix);
  74.  
  75. void arc_stroker_emit(struct arc *arc,
  76.                       struct stroker *stroke,
  77.                       struct matrix *matrix);
  78.  
  79.  
  80. #endif
  81.