/* * 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. */ #if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR) #error "Include <hb.h> instead." #endif #ifndef HB_DRAW_H #define HB_DRAW_H #include "hb.h" HB_BEGIN_DECLS /** * hb_draw_state_t * @path_open: Whether there is an open path * @path_start_x: X component of the start of current path * @path_start_y: Y component of the start of current path * @current_x: X component of current point * @current_y: Y component of current point * * Current drawing state. * * Since: 4.0.0 **/ hb_draw_state_t; /** * HB_DRAW_STATE_DEFAULT: * * The default #hb_draw_state_t at the start of glyph drawing. */ #define HB_DRAW_STATE_DEFAULT … /** * hb_draw_funcs_t: * * Glyph draw callbacks. * * #hb_draw_move_to_func_t, #hb_draw_line_to_func_t and * #hb_draw_cubic_to_func_t calls are necessary to be defined but we translate * #hb_draw_quadratic_to_func_t calls to #hb_draw_cubic_to_func_t if the * callback isn't defined. * * Since: 4.0.0 **/ hb_draw_funcs_t; /** * hb_draw_move_to_func_t: * @dfuncs: draw functions object * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph() * @st: current draw state * @to_x: X component of target point * @to_y: Y component of target point * @user_data: User data pointer passed to hb_draw_funcs_set_move_to_func() * * A virtual method for the #hb_draw_funcs_t to perform a "move-to" draw * operation. * * Since: 4.0.0 * **/ hb_draw_move_to_func_t; /** * hb_draw_line_to_func_t: * @dfuncs: draw functions object * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph() * @st: current draw state * @to_x: X component of target point * @to_y: Y component of target point * @user_data: User data pointer passed to hb_draw_funcs_set_line_to_func() * * A virtual method for the #hb_draw_funcs_t to perform a "line-to" draw * operation. * * Since: 4.0.0 * **/ hb_draw_line_to_func_t; /** * hb_draw_quadratic_to_func_t: * @dfuncs: draw functions object * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph() * @st: current draw state * @control_x: X component of control point * @control_y: Y component of control point * @to_x: X component of target point * @to_y: Y component of target point * @user_data: User data pointer passed to hb_draw_funcs_set_quadratic_to_func() * * A virtual method for the #hb_draw_funcs_t to perform a "quadratic-to" draw * operation. * * Since: 4.0.0 * **/ hb_draw_quadratic_to_func_t; /** * hb_draw_cubic_to_func_t: * @dfuncs: draw functions object * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph() * @st: current draw state * @control1_x: X component of first control point * @control1_y: Y component of first control point * @control2_x: X component of second control point * @control2_y: Y component of second control point * @to_x: X component of target point * @to_y: Y component of target point * @user_data: User data pointer passed to hb_draw_funcs_set_cubic_to_func() * * A virtual method for the #hb_draw_funcs_t to perform a "cubic-to" draw * operation. * * Since: 4.0.0 * **/ hb_draw_cubic_to_func_t; /** * hb_draw_close_path_func_t: * @dfuncs: draw functions object * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph() * @st: current draw state * @user_data: User data pointer passed to hb_draw_funcs_set_close_path_func() * * A virtual method for the #hb_draw_funcs_t to perform a "close-path" draw * operation. * * Since: 4.0.0 * **/ hb_draw_close_path_func_t; /** * hb_draw_funcs_set_move_to_func: * @dfuncs: draw functions object * @func: (closure user_data) (destroy destroy) (scope notified): move-to callback * @user_data: Data to pass to @func * @destroy: (nullable): The function to call when @user_data is not needed anymore * * Sets move-to callback to the draw functions object. * * Since: 4.0.0 **/ HB_EXTERN void hb_draw_funcs_set_move_to_func (hb_draw_funcs_t *dfuncs, hb_draw_move_to_func_t func, void *user_data, hb_destroy_func_t destroy); /** * hb_draw_funcs_set_line_to_func: * @dfuncs: draw functions object * @func: (closure user_data) (destroy destroy) (scope notified): line-to callback * @user_data: Data to pass to @func * @destroy: (nullable): The function to call when @user_data is not needed anymore * * Sets line-to callback to the draw functions object. * * Since: 4.0.0 **/ HB_EXTERN void hb_draw_funcs_set_line_to_func (hb_draw_funcs_t *dfuncs, hb_draw_line_to_func_t func, void *user_data, hb_destroy_func_t destroy); /** * hb_draw_funcs_set_quadratic_to_func: * @dfuncs: draw functions object * @func: (closure user_data) (destroy destroy) (scope notified): quadratic-to callback * @user_data: Data to pass to @func * @destroy: (nullable): The function to call when @user_data is not needed anymore * * Sets quadratic-to callback to the draw functions object. * * Since: 4.0.0 **/ HB_EXTERN void hb_draw_funcs_set_quadratic_to_func (hb_draw_funcs_t *dfuncs, hb_draw_quadratic_to_func_t func, void *user_data, hb_destroy_func_t destroy); /** * hb_draw_funcs_set_cubic_to_func: * @dfuncs: draw functions * @func: (closure user_data) (destroy destroy) (scope notified): cubic-to callback * @user_data: Data to pass to @func * @destroy: (nullable): The function to call when @user_data is not needed anymore * * Sets cubic-to callback to the draw functions object. * * Since: 4.0.0 **/ HB_EXTERN void hb_draw_funcs_set_cubic_to_func (hb_draw_funcs_t *dfuncs, hb_draw_cubic_to_func_t func, void *user_data, hb_destroy_func_t destroy); /** * hb_draw_funcs_set_close_path_func: * @dfuncs: draw functions object * @func: (closure user_data) (destroy destroy) (scope notified): close-path callback * @user_data: Data to pass to @func * @destroy: (nullable): The function to call when @user_data is not needed anymore * * Sets close-path callback to the draw functions object. * * Since: 4.0.0 **/ HB_EXTERN void hb_draw_funcs_set_close_path_func (hb_draw_funcs_t *dfuncs, hb_draw_close_path_func_t func, void *user_data, hb_destroy_func_t destroy); HB_EXTERN hb_draw_funcs_t * hb_draw_funcs_create (void); HB_EXTERN hb_draw_funcs_t * hb_draw_funcs_get_empty (void); HB_EXTERN hb_draw_funcs_t * hb_draw_funcs_reference (hb_draw_funcs_t *dfuncs); HB_EXTERN void hb_draw_funcs_destroy (hb_draw_funcs_t *dfuncs); HB_EXTERN hb_bool_t hb_draw_funcs_set_user_data (hb_draw_funcs_t *dfuncs, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy, hb_bool_t replace); HB_EXTERN void * hb_draw_funcs_get_user_data (const hb_draw_funcs_t *dfuncs, hb_user_data_key_t *key); HB_EXTERN void hb_draw_funcs_make_immutable (hb_draw_funcs_t *dfuncs); HB_EXTERN hb_bool_t hb_draw_funcs_is_immutable (hb_draw_funcs_t *dfuncs); HB_EXTERN void hb_draw_move_to (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st, float to_x, float to_y); HB_EXTERN void hb_draw_line_to (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st, float to_x, float to_y); HB_EXTERN void hb_draw_quadratic_to (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st, float control_x, float control_y, float to_x, float to_y); HB_EXTERN void hb_draw_cubic_to (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st, float control1_x, float control1_y, float control2_x, float control2_y, float to_x, float to_y); HB_EXTERN void hb_draw_close_path (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st); HB_END_DECLS #endif /* HB_DRAW_H */
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