| /* |
| * 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 |
| **/ |
| typedef struct hb_draw_state_t { |
| hb_bool_t path_open; |
| |
| float path_start_x; |
| float path_start_y; |
| |
| float current_x; |
| float current_y; |
| |
| /*< private >*/ |
| hb_var_num_t reserved1; |
| hb_var_num_t reserved2; |
| hb_var_num_t reserved3; |
| hb_var_num_t reserved4; |
| hb_var_num_t reserved5; |
| hb_var_num_t reserved6; |
| hb_var_num_t reserved7; |
| } 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 {0, 0.f, 0.f, 0.f, 0.f, {0.}, {0.}, {0.}} |
| |
| |
| /** |
| * 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 |
| **/ |
| |
| typedef struct hb_draw_funcs_t hb_draw_funcs_t; |
| |
| |
| /** |
| * hb_draw_move_to_func_t: |
| * @dfuncs: draw functions object |
| * @draw_data: The data accompanying the draw functions |
| * @st: current draw state |
| * @to_x: X component of target point |
| * @to_y: Y component of target point |
| * @user_data: User data pointer passed by the caller |
| * |
| * A virtual method for the #hb_draw_funcs_t to perform a "move-to" draw |
| * operation. |
| * |
| * Since: 4.0.0 |
| * |
| **/ |
| typedef void (*hb_draw_move_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data); |
| |
| /** |
| * hb_draw_line_to_func_t: |
| * @dfuncs: draw functions object |
| * @draw_data: The data accompanying the draw functions |
| * @st: current draw state |
| * @to_x: X component of target point |
| * @to_y: Y component of target point |
| * @user_data: User data pointer passed by the caller |
| * |
| * A virtual method for the #hb_draw_funcs_t to perform a "line-to" draw |
| * operation. |
| * |
| * Since: 4.0.0 |
| * |
| **/ |
| typedef void (*hb_draw_line_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data); |
| |
| /** |
| * hb_draw_quadratic_to_func_t: |
| * @dfuncs: draw functions object |
| * @draw_data: The data accompanying the draw functions |
| * @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 by the caller |
| * |
| * A virtual method for the #hb_draw_funcs_t to perform a "quadratic-to" draw |
| * operation. |
| * |
| * Since: 4.0.0 |
| * |
| **/ |
| typedef void (*hb_draw_quadratic_to_func_t) (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, |
| void *user_data); |
| |
| /** |
| * hb_draw_cubic_to_func_t: |
| * @dfuncs: draw functions object |
| * @draw_data: The data accompanying the draw functions |
| * @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 by the caller |
| * |
| * A virtual method for the #hb_draw_funcs_t to perform a "cubic-to" draw |
| * operation. |
| * |
| * Since: 4.0.0 |
| * |
| **/ |
| typedef void (*hb_draw_cubic_to_func_t) (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, |
| void *user_data); |
| |
| /** |
| * hb_draw_close_path_func_t: |
| * @dfuncs: draw functions object |
| * @draw_data: The data accompanying the draw functions |
| * @st: current draw state |
| * @user_data: User data pointer passed by the caller |
| * |
| * A virtual method for the #hb_draw_funcs_t to perform a "close-path" draw |
| * operation. |
| * |
| * Since: 4.0.0 |
| * |
| **/ |
| typedef void (*hb_draw_close_path_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data, |
| hb_draw_state_t *st, |
| void *user_data); |
| |
| /** |
| * 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_reference (hb_draw_funcs_t *dfuncs); |
| |
| HB_EXTERN void |
| hb_draw_funcs_destroy (hb_draw_funcs_t *dfuncs); |
| |
| 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 */ |