/* * 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. */ #include "hb.hh" #ifndef HB_NO_DRAW #include "hb-draw.hh" /** * SECTION:hb-draw * @title: hb-draw * @short_description: Glyph drawing * @include: hb.h * * Functions for drawing (extracting) glyph shapes. * * The #hb_draw_funcs_t struct can be used with hb_font_draw_glyph(). **/ static void hb_draw_move_to_nil (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data HB_UNUSED, hb_draw_state_t *st HB_UNUSED, float to_x HB_UNUSED, float to_y HB_UNUSED, void *user_data HB_UNUSED) { … } static void hb_draw_line_to_nil (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data HB_UNUSED, hb_draw_state_t *st HB_UNUSED, float to_x HB_UNUSED, float to_y HB_UNUSED, void *user_data HB_UNUSED) { … } static void hb_draw_quadratic_to_nil (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_UNUSED) { … } static void hb_draw_cubic_to_nil (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data HB_UNUSED, hb_draw_state_t *st HB_UNUSED, float control1_x HB_UNUSED, float control1_y HB_UNUSED, float control2_x HB_UNUSED, float control2_y HB_UNUSED, float to_x HB_UNUSED, float to_y HB_UNUSED, void *user_data HB_UNUSED) { … } static void hb_draw_close_path_nil (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data HB_UNUSED, hb_draw_state_t *st HB_UNUSED, void *user_data HB_UNUSED) { … } static bool _hb_draw_funcs_set_preamble (hb_draw_funcs_t *dfuncs, bool func_is_null, void **user_data, hb_destroy_func_t *destroy) { … } static bool _hb_draw_funcs_set_middle (hb_draw_funcs_t *dfuncs, void *user_data, hb_destroy_func_t destroy) { … } #define HB_DRAW_FUNC_IMPLEMENT … HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS #undef HB_DRAW_FUNC_IMPLEMENT /** * hb_draw_funcs_create: * * Creates a new draw callbacks object. * * Return value: (transfer full): * A newly allocated #hb_draw_funcs_t with a reference count of 1. The initial * reference count should be released with hb_draw_funcs_destroy when you are * done using the #hb_draw_funcs_t. This function never returns `NULL`. If * memory cannot be allocated, a special singleton #hb_draw_funcs_t object will * be returned. * * Since: 4.0.0 **/ hb_draw_funcs_t * hb_draw_funcs_create () { … } DEFINE_NULL_INSTANCE (hb_draw_funcs_t) = …; /** * hb_draw_funcs_get_empty: * * Fetches the singleton empty draw-functions structure. * * Return value: (transfer full): The empty draw-functions structure * * Since: 7.0.0 **/ hb_draw_funcs_t * hb_draw_funcs_get_empty () { … } /** * hb_draw_funcs_reference: (skip) * @dfuncs: draw functions * * Increases the reference count on @dfuncs by one. * * This prevents @dfuncs from being destroyed until a matching * call to hb_draw_funcs_destroy() is made. * * Return value: (transfer full): * The referenced #hb_draw_funcs_t. * * Since: 4.0.0 **/ hb_draw_funcs_t * hb_draw_funcs_reference (hb_draw_funcs_t *dfuncs) { … } /** * hb_draw_funcs_destroy: (skip) * @dfuncs: draw functions * * Deallocate the @dfuncs. * Decreases the reference count on @dfuncs by one. If the result is zero, then * @dfuncs and all associated resources are freed. See hb_draw_funcs_reference(). * * Since: 4.0.0 **/ void hb_draw_funcs_destroy (hb_draw_funcs_t *dfuncs) { … } /** * hb_draw_funcs_set_user_data: (skip) * @dfuncs: The draw-functions structure * @key: The user-data key * @data: A pointer to the user data * @destroy: (nullable): A callback to call when @data is not needed anymore * @replace: Whether to replace an existing data with the same key * * Attaches a user-data key/data pair to the specified draw-functions structure. * * Return value: `true` if success, `false` otherwise * * Since: 7.0.0 **/ 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_draw_funcs_get_user_data: (skip) * @dfuncs: The draw-functions structure * @key: The user-data key to query * * Fetches the user-data associated with the specified key, * attached to the specified draw-functions structure. * * Return value: (transfer none): A pointer to the user data * * Since: 7.0.0 **/ void * hb_draw_funcs_get_user_data (const hb_draw_funcs_t *dfuncs, hb_user_data_key_t *key) { … } /** * hb_draw_funcs_make_immutable: * @dfuncs: draw functions * * Makes @dfuncs object immutable. * * Since: 4.0.0 **/ void hb_draw_funcs_make_immutable (hb_draw_funcs_t *dfuncs) { … } /** * hb_draw_funcs_is_immutable: * @dfuncs: draw functions * * Checks whether @dfuncs is immutable. * * Return value: `true` if @dfuncs is immutable, `false` otherwise * * Since: 4.0.0 **/ hb_bool_t hb_draw_funcs_is_immutable (hb_draw_funcs_t *dfuncs) { … } /** * hb_draw_move_to: * @dfuncs: draw functions * @draw_data: associated draw data passed by the caller * @st: current draw state * @to_x: X component of target point * @to_y: Y component of target point * * Perform a "move-to" draw operation. * * Since: 4.0.0 **/ 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_draw_line_to: * @dfuncs: draw functions * @draw_data: associated draw data passed by the caller * @st: current draw state * @to_x: X component of target point * @to_y: Y component of target point * * Perform a "line-to" draw operation. * * Since: 4.0.0 **/ 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_draw_quadratic_to: * @dfuncs: draw functions * @draw_data: associated draw data passed by the caller * @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 * * Perform a "quadratic-to" draw operation. * * Since: 4.0.0 **/ 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_draw_cubic_to: * @dfuncs: draw functions * @draw_data: associated draw data passed by the caller * @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 * * Perform a "cubic-to" draw operation. * * Since: 4.0.0 **/ 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_draw_close_path: * @dfuncs: draw functions * @draw_data: associated draw data passed by the caller * @st: current draw state * * Perform a "close-path" draw operation. * * Since: 4.0.0 **/ void hb_draw_close_path (hb_draw_funcs_t *dfuncs, void *draw_data, hb_draw_state_t *st) { … } #endif
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