src/gallium/state_trackers/vega/path.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
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   5  * Permission is hereby granted, free of charge, to any person obtaining a
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  10  * permit persons to whom the Software is furnished to do so, subject to
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  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
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  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  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