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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 _PATH_H
  28. #define _PATH_H
  29.  
  30. #include "VG/openvg.h"
  31.  
  32. struct path;
  33. struct polygon;
  34. struct matrix;
  35.  
  36. enum fill_rule {
  37.    ODD_EVEN_FILL,
  38.    WINDING_FILL
  39. };
  40.  
  41.  
  42. struct path_for_each_data {
  43.    VGubyte segment;
  44.    /* all coords are absolute, even if segment is relative */
  45.    const VGfloat *coords;
  46.    VGfloat sx, sy, ox, oy, px, py;
  47.    void *user_data;
  48. };
  49.  
  50. typedef VGboolean (*path_for_each_cb)(struct path *p,
  51.                                       struct path_for_each_data *data);
  52.  
  53.  
  54. struct path *path_create(VGPathDatatype dt, VGfloat scale, VGfloat bias,
  55.                          VGint segmentCapacityHint,
  56.                          VGint coordCapacityHint,
  57.                          VGbitfield capabilities);
  58. void path_destroy(struct path *p);
  59.  
  60. VGbitfield path_capabilities(struct path *p);
  61. void path_set_capabilities(struct path *p, VGbitfield bf);
  62.  
  63. void path_append_data(struct path *p,
  64.                       VGint numSegments,
  65.                       const VGubyte * pathSegments,
  66.                       const void * pathData);
  67.  
  68. void path_append_path(struct path *dst,
  69.                       struct path *src);
  70.  
  71. VGint path_num_segments(struct path *p);
  72.  
  73. void path_bounding_rect(struct path *p, float *x, float *y,
  74.                         float *w, float *h);
  75. float path_length(struct path *p, int start_segment, int num_segments);
  76.  
  77. void path_set_fill_rule(enum fill_rule fill);
  78. enum fill_rule path_fill_rule(enum fill_rule fill);
  79.  
  80. VGboolean path_is_empty(struct path *p);
  81.  
  82. VGbyte path_datatype_size(struct path *p);
  83.  
  84. VGPathDatatype path_datatype(struct path *p);
  85. VGfloat path_scale(struct path *p);
  86. VGfloat path_bias(struct path *p);
  87. VGint path_num_coords(struct path *p);
  88.  
  89. void path_modify_coords(struct path *p,
  90.                         VGint startIndex,
  91.                         VGint numSegments,
  92.                         const void * pathData);
  93.  
  94. struct path *path_create_stroke(struct path *p,
  95.                                 struct matrix *m);
  96.  
  97. void path_for_each_segment(struct path *path,
  98.                            path_for_each_cb cb,
  99.                            void *user_data);
  100.  
  101. void path_transform(struct path *dst, struct path *src);
  102. VGboolean path_interpolate(struct path *dst,
  103.                            struct path *start, struct path *end,
  104.                            VGfloat amount);
  105.  
  106. void path_clear(struct path *p, VGbitfield capabilities);
  107. void path_render(struct path *p, VGbitfield paintModes, struct matrix *mat);
  108. void path_fill(struct path *p);
  109. void path_stroke(struct path *p);
  110.  
  111. void path_move_to(struct path *p, float x, float y);
  112. void path_line_to(struct path *p, float x, float y);
  113. void path_cubic_to(struct path *p, float px1, float py1,
  114.                    float px2, float py2,
  115.                    float x, float y);
  116.  
  117. void path_point(struct path *p, VGint startSegment, VGint numSegments,
  118.                 VGfloat distance, VGfloat *point, VGfloat *normal);
  119.  
  120.  
  121.  
  122. void vg_float_to_datatype(VGPathDatatype datatype,
  123.                           VGubyte *common_data,
  124.                           const VGfloat *data,
  125.                           VGint num_coords);
  126. #endif
  127.