kc3-lang/harfbuzz/src/hb-draw.h

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• Hash : 755a77d6
  Author :
  Date : 2020-01-29T22:26:04
  

  Move outline draw API behind HB_EXPERIMENTAL_API directive
  

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• src/hb-draw.h

• /*
   * Copyright © 2019-2020  Ebrahim Byagowi
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   */
  
  #ifndef HB_H_IN
  #error "Include <hb.h> instead."
  #endif
  
  #ifndef HB_DRAW_H
  #define HB_DRAW_H
  
  #include "hb.h"
  
  HB_BEGIN_DECLS
  
  #ifdef HB_EXPERIMENTAL_API
  typedef void (*hb_draw_move_to_func_t) (hb_position_t to_x, hb_position_t to_y, void *user_data);
  typedef void (*hb_draw_line_to_func_t) (hb_position_t to_x, hb_position_t to_y, void *user_data);
  typedef void (*hb_draw_quadratic_to_func_t) (hb_position_t control_x, hb_position_t control_y,
  					     hb_position_t to_x, hb_position_t to_y,
  					     void *user_data);
  typedef void (*hb_draw_cubic_to_func_t) (hb_position_t control1_x, hb_position_t control1_y,
  					 hb_position_t control2_x, hb_position_t control2_y,
  					 hb_position_t to_x, hb_position_t to_y,
  					 void *user_data);
  typedef void (*hb_draw_close_path_func_t) (void *user_data);
  
  /**
   * hb_draw_funcs_t:
   *
   * Glyph draw callbacks.
   *
   * _move_to, _line_to and _cubic_to calls are nessecary to be defined but we
   * translate _quadratic_to calls to _cubic_to if the callback isn't defined.
   *
   * Since: EXPERIMENTAL
   **/
  typedef struct hb_draw_funcs_t hb_draw_funcs_t;
  
  HB_EXTERN void
  hb_draw_funcs_set_move_to_func (hb_draw_funcs_t        *funcs,
  				hb_draw_move_to_func_t  move_to);
  
  HB_EXTERN void
  hb_draw_funcs_set_line_to_func (hb_draw_funcs_t        *funcs,
  				hb_draw_line_to_func_t  line_to);
  
  HB_EXTERN void
  hb_draw_funcs_set_quadratic_to_func (hb_draw_funcs_t             *funcs,
  				     hb_draw_quadratic_to_func_t  quadratic_to);
  
  HB_EXTERN void
  hb_draw_funcs_set_cubic_to_func (hb_draw_funcs_t         *funcs,
  				 hb_draw_cubic_to_func_t  cubic_to);
  
  HB_EXTERN void
  hb_draw_funcs_set_close_path_func (hb_draw_funcs_t           *funcs,
  				   hb_draw_close_path_func_t  close_path);
  
  HB_EXTERN hb_draw_funcs_t *
  hb_draw_funcs_create (void);
  
  HB_EXTERN hb_draw_funcs_t *
  hb_draw_funcs_reference (hb_draw_funcs_t *funcs);
  
  HB_EXTERN void
  hb_draw_funcs_destroy (hb_draw_funcs_t *funcs);
  
  HB_EXTERN void
  hb_draw_funcs_make_immutable (hb_draw_funcs_t *funcs);
  
  HB_EXTERN hb_bool_t
  hb_draw_funcs_is_immutable (hb_draw_funcs_t *funcs);
  #endif
  
  HB_END_DECLS
  
  #endif /* HB_DRAW_H */
  

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