workbench/libs/mesa/src/gallium/state_trackers/vega/stroker.h

   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,
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  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.
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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 STROKER_H
  28 #define STROKER_H
  29
  30 #include "VG/openvg.h"
  31 #include "api_consts.h"
  32
  33 struct path;
  34 struct vg_state;
  35 struct array;
  36
  37 struct stroker {
  38    void (*begin)(struct stroker *stroker);
  39    void (*process_subpath)(struct stroker *stroker);
  40    void (*end)(struct stroker *stroker);
  41
  42    struct array *segments;
  43    struct array *control_points;
  44    struct path *path;
  45
  46    VGfloat back1_x, back1_y;
  47    VGfloat back2_x, back2_y;
  48
  49    VGfloat     stroke_width;
  50    VGfloat     miter_limit;
  51    VGCapStyle  cap_style;
  52    VGJoinStyle join_style;
  53
  54    VGPathCommand last_cmd;
  55 };
  56
  57 struct dash_stroker {
  58    struct stroker base;
  59
  60    struct stroker stroker;
  61
  62    VGfloat dash_pattern[VEGA_MAX_DASH_COUNT];
  63    VGint dash_pattern_num;
  64    VGfloat dash_phase;
  65    VGboolean dash_phase_reset;
  66 };
  67
  68 void stroker_init(struct stroker *stroker,
  69                   struct vg_state *state);
  70 void dash_stroker_init(struct stroker *stroker,
  71                        struct vg_state *state);
  72 void dash_stroker_cleanup(struct dash_stroker *stroker);
  73 void stroker_cleanup(struct stroker *stroker);
  74
  75 void stroker_begin(struct stroker *stroker);
  76 void stroker_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
  77 void stroker_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
  78 void stroker_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
  79                       VGfloat px2, VGfloat py2,
  80                       VGfloat x, VGfloat y);
  81 void stroker_end(struct stroker *stroker);
  82
  83 void stroker_emit_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
  84 void stroker_emit_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
  85 void stroker_emit_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
  86                            VGfloat px2, VGfloat py2,
  87                            VGfloat x, VGfloat y);
  88
  89 #endif