diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-draw.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-draw.cc | 171 |
1 files changed, 146 insertions, 25 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-draw.cc b/src/3rdparty/harfbuzz-ng/src/hb-draw.cc index b31019b07e..f204f56bc7 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-draw.cc +++ b/src/3rdparty/harfbuzz-ng/src/hb-draw.cc @@ -35,6 +35,8 @@ * @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 @@ -56,12 +58,14 @@ hb_draw_quadratic_to_nil (hb_draw_funcs_t *dfuncs, void *draw_data, float to_x, float to_y, void *user_data HB_UNUSED) { +#define HB_ONE_THIRD 0.33333333f dfuncs->emit_cubic_to (draw_data, *st, - (st->current_x + 2.f * control_x) / 3.f, - (st->current_y + 2.f * control_y) / 3.f, - (to_x + 2.f * control_x) / 3.f, - (to_y + 2.f * control_y) / 3.f, + (st->current_x + 2.f * control_x) * HB_ONE_THIRD, + (st->current_y + 2.f * control_y) * HB_ONE_THIRD, + (to_x + 2.f * control_x) * HB_ONE_THIRD, + (to_y + 2.f * control_y) * HB_ONE_THIRD, to_x, to_y); +#undef HB_ONE_THIRD } static void @@ -78,6 +82,56 @@ hb_draw_close_path_nil (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data HB_UN 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) +{ + if (hb_object_is_immutable (dfuncs)) + { + if (*destroy) + (*destroy) (*user_data); + return false; + } + + if (func_is_null) + { + if (*destroy) + (*destroy) (*user_data); + *destroy = nullptr; + *user_data = nullptr; + } + + return true; +} + +static bool +_hb_draw_funcs_set_middle (hb_draw_funcs_t *dfuncs, + void *user_data, + hb_destroy_func_t destroy) +{ + if (user_data && !dfuncs->user_data) + { + dfuncs->user_data = (decltype (dfuncs->user_data)) hb_calloc (1, sizeof (*dfuncs->user_data)); + if (unlikely (!dfuncs->user_data)) + goto fail; + } + if (destroy && !dfuncs->destroy) + { + dfuncs->destroy = (decltype (dfuncs->destroy)) hb_calloc (1, sizeof (*dfuncs->destroy)); + if (unlikely (!dfuncs->destroy)) + goto fail; + } + + return true; + +fail: + if (destroy) + (destroy) (user_data); + return false; +} + #define HB_DRAW_FUNC_IMPLEMENT(name) \ \ void \ @@ -86,35 +140,38 @@ hb_draw_funcs_set_##name##_func (hb_draw_funcs_t *dfuncs, \ void *user_data, \ hb_destroy_func_t destroy) \ { \ - if (hb_object_is_immutable (dfuncs)) \ - return; \ - \ - if (dfuncs->destroy.name) \ - dfuncs->destroy.name (dfuncs->user_data.name); \ + if (!_hb_draw_funcs_set_preamble (dfuncs, !func, &user_data, &destroy))\ + return; \ \ - if (func) { \ - dfuncs->func.name = func; \ - dfuncs->user_data.name = user_data; \ - dfuncs->destroy.name = destroy; \ - } else { \ - dfuncs->func.name = hb_draw_##name##_nil; \ - dfuncs->user_data.name = nullptr; \ - dfuncs->destroy.name = nullptr; \ - } \ + if (dfuncs->destroy && dfuncs->destroy->name) \ + dfuncs->destroy->name (!dfuncs->user_data ? nullptr : dfuncs->user_data->name); \ + \ + if (!_hb_draw_funcs_set_middle (dfuncs, user_data, destroy)) \ + return; \ + \ + if (func) \ + dfuncs->func.name = func; \ + else \ + dfuncs->func.name = hb_draw_##name##_nil; \ + \ + if (dfuncs->user_data) \ + dfuncs->user_data->name = user_data; \ + if (dfuncs->destroy) \ + dfuncs->destroy->name = destroy; \ } HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS #undef HB_DRAW_FUNC_IMPLEMENT /** - * hb_draw_funcs_create: (Xconstructor) + * 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 + * 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. * @@ -143,13 +200,29 @@ 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 () +{ + return const_cast<hb_draw_funcs_t *> (&Null (hb_draw_funcs_t)); +} /** * hb_draw_funcs_reference: (skip) * @dfuncs: draw functions * - * Increases the reference count on @dfuncs by one. This prevents @buffer from - * being destroyed until a matching call to hb_draw_funcs_destroy() is made. + * 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. @@ -177,16 +250,64 @@ hb_draw_funcs_destroy (hb_draw_funcs_t *dfuncs) { if (!hb_object_destroy (dfuncs)) return; + if (dfuncs->destroy) + { #define HB_DRAW_FUNC_IMPLEMENT(name) \ - if (dfuncs->destroy.name) dfuncs->destroy.name (dfuncs->user_data.name); - HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS + if (dfuncs->destroy->name) dfuncs->destroy->name (!dfuncs->user_data ? nullptr : dfuncs->user_data->name); + HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS #undef HB_DRAW_FUNC_IMPLEMENT + } + hb_free (dfuncs->destroy); + hb_free (dfuncs->user_data); hb_free (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) +{ + return hb_object_set_user_data (dfuncs, key, data, destroy, 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) +{ + return hb_object_get_user_data (dfuncs, key); +} + +/** * hb_draw_funcs_make_immutable: * @dfuncs: draw functions * @@ -209,7 +330,7 @@ hb_draw_funcs_make_immutable (hb_draw_funcs_t *dfuncs) * * Checks whether @dfuncs is immutable. * - * Return value: %true if @dfuncs is immutable, %false otherwise + * Return value: `true` if @dfuncs is immutable, `false` otherwise * * Since: 4.0.0 **/ |