diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-font.cc')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-font.cc | 1184 |
1 files changed, 681 insertions, 503 deletions
diff --git a/thirdparty/harfbuzz/src/hb-font.cc b/thirdparty/harfbuzz/src/hb-font.cc index 27959487dc..5c8357ff28 100644 --- a/thirdparty/harfbuzz/src/hb-font.cc +++ b/thirdparty/harfbuzz/src/hb-font.cc @@ -43,10 +43,20 @@ * @short_description: Font objects * @include: hb.h * - * Font objects represent a font face at a certain size and other - * parameters (pixels per EM, points per EM, variation settings.) - * Fonts are created from font faces, and are used as input to - * hb_shape() among other things. + * Functions for working with font objects. + * + * A font object represents a font face at a specific size and with + * certain other parameters (pixels-per-em, points-per-em, variation + * settings) specified. Font objects are created from font face + * objects, and are used as input to hb_shape(), among other things. + * + * Client programs can optionally pass in their own functions that + * implement the basic, lower-level queries of font objects. This set + * of font functions is defined by the virtual methods in + * #hb_font_funcs_t. + * + * HarfBuzz provides a built-in set of lightweight default + * functions for each method in #hb_font_funcs_t. **/ @@ -55,19 +65,20 @@ */ static hb_bool_t -hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, +hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, hb_font_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { memset (extents, 0, sizeof (*extents)); return false; } + static hb_bool_t -hb_font_get_font_h_extents_default (hb_font_t *font, - void *font_data HB_UNUSED, +hb_font_get_font_h_extents_default (hb_font_t *font, + void *font_data HB_UNUSED, hb_font_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_font_h_extents (extents); if (ret) { @@ -79,19 +90,20 @@ hb_font_get_font_h_extents_default (hb_font_t *font, } static hb_bool_t -hb_font_get_font_v_extents_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, +hb_font_get_font_v_extents_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, hb_font_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { memset (extents, 0, sizeof (*extents)); return false; } + static hb_bool_t -hb_font_get_font_v_extents_default (hb_font_t *font, - void *font_data HB_UNUSED, +hb_font_get_font_v_extents_default (hb_font_t *font, + void *font_data HB_UNUSED, hb_font_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_font_v_extents (extents); if (ret) { @@ -103,21 +115,22 @@ hb_font_get_font_v_extents_default (hb_font_t *font, } static hb_bool_t -hb_font_get_nominal_glyph_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t unicode HB_UNUSED, +hb_font_get_nominal_glyph_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { *glyph = 0; return false; } + static hb_bool_t -hb_font_get_nominal_glyph_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t unicode, +hb_font_get_nominal_glyph_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t unicode, hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { if (font->has_nominal_glyphs_func_set ()) { @@ -127,15 +140,16 @@ hb_font_get_nominal_glyph_default (hb_font_t *font, } #define hb_font_get_nominal_glyphs_nil hb_font_get_nominal_glyphs_default + static unsigned int -hb_font_get_nominal_glyphs_default (hb_font_t *font, - void *font_data HB_UNUSED, - unsigned int count, +hb_font_get_nominal_glyphs_default (hb_font_t *font, + void *font_data HB_UNUSED, + unsigned int count, const hb_codepoint_t *first_unicode, - unsigned int unicode_stride, - hb_codepoint_t *first_glyph, - unsigned int glyph_stride, - void *user_data HB_UNUSED) + unsigned int unicode_stride, + hb_codepoint_t *first_glyph, + unsigned int glyph_stride, + void *user_data HB_UNUSED) { if (font->has_nominal_glyph_func_set ()) { @@ -156,41 +170,43 @@ hb_font_get_nominal_glyphs_default (hb_font_t *font, } static hb_bool_t -hb_font_get_variation_glyph_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t unicode HB_UNUSED, - hb_codepoint_t variation_selector HB_UNUSED, +hb_font_get_variation_glyph_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, + hb_codepoint_t variation_selector HB_UNUSED, hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { *glyph = 0; return false; } + static hb_bool_t -hb_font_get_variation_glyph_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t unicode, - hb_codepoint_t variation_selector, +hb_font_get_variation_glyph_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t unicode, + hb_codepoint_t variation_selector, hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { return font->parent->get_variation_glyph (unicode, variation_selector, glyph); } static hb_position_t -hb_font_get_glyph_h_advance_nil (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_advance_nil (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + void *user_data HB_UNUSED) { return font->x_scale; } + static hb_position_t -hb_font_get_glyph_h_advance_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_advance_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + void *user_data HB_UNUSED) { if (font->has_glyph_h_advances_func_set ()) { @@ -202,19 +218,20 @@ hb_font_get_glyph_h_advance_default (hb_font_t *font, } static hb_position_t -hb_font_get_glyph_v_advance_nil (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_advance_nil (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + void *user_data HB_UNUSED) { /* TODO use font_extents.ascender+descender */ return font->y_scale; } + static hb_position_t -hb_font_get_glyph_v_advance_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_advance_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + void *user_data HB_UNUSED) { if (font->has_glyph_v_advances_func_set ()) { @@ -226,15 +243,16 @@ hb_font_get_glyph_v_advance_default (hb_font_t *font, } #define hb_font_get_glyph_h_advances_nil hb_font_get_glyph_h_advances_default + static void -hb_font_get_glyph_h_advances_default (hb_font_t* font, - void* font_data HB_UNUSED, - unsigned int count, +hb_font_get_glyph_h_advances_default (hb_font_t* font, + void* font_data HB_UNUSED, + unsigned int count, const hb_codepoint_t *first_glyph, - unsigned int glyph_stride, - hb_position_t *first_advance, - unsigned int advance_stride, - void *user_data HB_UNUSED) + unsigned int glyph_stride, + hb_position_t *first_advance, + unsigned int advance_stride, + void *user_data HB_UNUSED) { if (font->has_glyph_h_advance_func_set ()) { @@ -259,14 +277,14 @@ hb_font_get_glyph_h_advances_default (hb_font_t* font, #define hb_font_get_glyph_v_advances_nil hb_font_get_glyph_v_advances_default static void -hb_font_get_glyph_v_advances_default (hb_font_t* font, - void* font_data HB_UNUSED, - unsigned int count, +hb_font_get_glyph_v_advances_default (hb_font_t* font, + void* font_data HB_UNUSED, + unsigned int count, const hb_codepoint_t *first_glyph, - unsigned int glyph_stride, - hb_position_t *first_advance, - unsigned int advance_stride, - void *user_data HB_UNUSED) + unsigned int glyph_stride, + hb_position_t *first_advance, + unsigned int advance_stride, + void *user_data HB_UNUSED) { if (font->has_glyph_v_advance_func_set ()) { @@ -290,23 +308,24 @@ hb_font_get_glyph_v_advances_default (hb_font_t* font, } static hb_bool_t -hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { *x = *y = 0; return true; } + static hb_bool_t -hb_font_get_glyph_h_origin_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_origin_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y); if (ret) @@ -315,23 +334,24 @@ hb_font_get_glyph_h_origin_default (hb_font_t *font, } static hb_bool_t -hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { *x = *y = 0; return false; } + static hb_bool_t -hb_font_get_glyph_v_origin_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_origin_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y); if (ret) @@ -340,61 +360,64 @@ hb_font_get_glyph_v_origin_default (hb_font_t *font, } static hb_position_t -hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t left_glyph HB_UNUSED, - hb_codepoint_t right_glyph HB_UNUSED, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t left_glyph HB_UNUSED, + hb_codepoint_t right_glyph HB_UNUSED, + void *user_data HB_UNUSED) { return 0; } + static hb_position_t -hb_font_get_glyph_h_kerning_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t left_glyph, - hb_codepoint_t right_glyph, - void *user_data HB_UNUSED) +hb_font_get_glyph_h_kerning_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t left_glyph, + hb_codepoint_t right_glyph, + void *user_data HB_UNUSED) { return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph)); } #ifndef HB_DISABLE_DEPRECATED static hb_position_t -hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t top_glyph HB_UNUSED, - hb_codepoint_t bottom_glyph HB_UNUSED, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t top_glyph HB_UNUSED, + hb_codepoint_t bottom_glyph HB_UNUSED, + void *user_data HB_UNUSED) { return 0; } + static hb_position_t -hb_font_get_glyph_v_kerning_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t top_glyph, - hb_codepoint_t bottom_glyph, - void *user_data HB_UNUSED) +hb_font_get_glyph_v_kerning_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t top_glyph, + hb_codepoint_t bottom_glyph, + void *user_data HB_UNUSED) { return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph)); } #endif static hb_bool_t -hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, +hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, hb_glyph_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { memset (extents, 0, sizeof (*extents)); return false; } + static hb_bool_t -hb_font_get_glyph_extents_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, +hb_font_get_glyph_extents_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, hb_glyph_extents_t *extents, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents); if (ret) { @@ -405,25 +428,26 @@ hb_font_get_glyph_extents_default (hb_font_t *font, } static hb_bool_t -hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - unsigned int point_index HB_UNUSED, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + unsigned int point_index HB_UNUSED, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { *x = *y = 0; return false; } + static hb_bool_t -hb_font_get_glyph_contour_point_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - unsigned int point_index, - hb_position_t *x, - hb_position_t *y, - void *user_data HB_UNUSED) +hb_font_get_glyph_contour_point_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + unsigned int point_index, + hb_position_t *x, + hb_position_t *y, + void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y); if (ret) @@ -432,42 +456,47 @@ hb_font_get_glyph_contour_point_default (hb_font_t *font, } static hb_bool_t -hb_font_get_glyph_name_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - hb_codepoint_t glyph HB_UNUSED, - char *name, unsigned int size, - void *user_data HB_UNUSED) +hb_font_get_glyph_name_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + hb_codepoint_t glyph HB_UNUSED, + char *name, + unsigned int size, + void *user_data HB_UNUSED) { if (size) *name = '\0'; return false; } + static hb_bool_t -hb_font_get_glyph_name_default (hb_font_t *font, - void *font_data HB_UNUSED, - hb_codepoint_t glyph, - char *name, unsigned int size, - void *user_data HB_UNUSED) +hb_font_get_glyph_name_default (hb_font_t *font, + void *font_data HB_UNUSED, + hb_codepoint_t glyph, + char *name, + unsigned int size, + void *user_data HB_UNUSED) { return font->parent->get_glyph_name (glyph, name, size); } static hb_bool_t -hb_font_get_glyph_from_name_nil (hb_font_t *font HB_UNUSED, - void *font_data HB_UNUSED, - const char *name HB_UNUSED, - int len HB_UNUSED, /* -1 means nul-terminated */ +hb_font_get_glyph_from_name_nil (hb_font_t *font HB_UNUSED, + void *font_data HB_UNUSED, + const char *name HB_UNUSED, + int len HB_UNUSED, /* -1 means nul-terminated */ hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { *glyph = 0; return false; } + static hb_bool_t -hb_font_get_glyph_from_name_default (hb_font_t *font, - void *font_data HB_UNUSED, - const char *name, int len, /* -1 means nul-terminated */ +hb_font_get_glyph_from_name_default (hb_font_t *font, + void *font_data HB_UNUSED, + const char *name, + int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph, - void *user_data HB_UNUSED) + void *user_data HB_UNUSED) { return font->parent->get_glyph_from_name (name, len, glyph); } @@ -521,9 +550,9 @@ static const hb_font_funcs_t _hb_font_funcs_default = { /** * hb_font_funcs_create: (Xconstructor) * + * Creates a new #hb_font_funcs_t structure of font functions. * - * - * Return value: (transfer full): + * Return value: (transfer full): The font-functions structure * * Since: 0.9.2 **/ @@ -543,9 +572,9 @@ hb_font_funcs_create () /** * hb_font_funcs_get_empty: * + * Fetches an empty font-functions structure. * - * - * Return value: (transfer full): + * Return value: (transfer full): The font-functions structure * * Since: 0.9.2 **/ @@ -557,11 +586,11 @@ hb_font_funcs_get_empty () /** * hb_font_funcs_reference: (skip) - * @ffuncs: font functions. + * @ffuncs: The font-functions structure * + * Increases the reference count on a font-functions structure. * - * - * Return value: + * Return value: The font-functions structure * * Since: 0.9.2 **/ @@ -573,9 +602,11 @@ hb_font_funcs_reference (hb_font_funcs_t *ffuncs) /** * hb_font_funcs_destroy: (skip) - * @ffuncs: font functions. - * + * @ffuncs: The font-functions structure * + * Decreases the reference count on a font-functions structure. When + * the reference count reaches zero, the font-functions structure is + * destroyed, freeing all memory. * * Since: 0.9.2 **/ @@ -594,15 +625,15 @@ hb_font_funcs_destroy (hb_font_funcs_t *ffuncs) /** * hb_font_funcs_set_user_data: (skip) - * @ffuncs: font functions. - * @key: - * @data: - * @destroy: - * @replace: - * + * @ffuncs: The font-functions structure + * @key: The user-data key to set + * @data: A pointer to the user data set + * @destroy: (optional): 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 font-functions structure. * - * Return value: + * Return value: %true if success, %false otherwise * * Since: 0.9.2 **/ @@ -610,7 +641,7 @@ hb_bool_t hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs, hb_user_data_key_t *key, void * data, - hb_destroy_func_t destroy, + hb_destroy_func_t destroy /* May be NULL. */, hb_bool_t replace) { return hb_object_set_user_data (ffuncs, key, data, destroy, replace); @@ -618,12 +649,13 @@ hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs, /** * hb_font_funcs_get_user_data: (skip) - * @ffuncs: font functions. - * @key: - * + * @ffuncs: The font-functions structure + * @key: The user-data key to query * + * Fetches the user data associated with the specified key, + * attached to the specified font-functions structure. * - * Return value: (transfer none): + * Return value: (transfer none): A pointer to the user data * * Since: 0.9.2 **/ @@ -637,9 +669,9 @@ hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs, /** * hb_font_funcs_make_immutable: - * @ffuncs: font functions. - * + * @ffuncs: The font-functions structure * + * Makes a font-functions structure immutable. * * Since: 0.9.2 **/ @@ -654,11 +686,11 @@ hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs) /** * hb_font_funcs_is_immutable: - * @ffuncs: font functions. - * + * @ffuncs: The font-functions structure * + * Tests whether a font-functions structure is immutable. * - * Return value: + * Return value: %true if @ffuncs is immutable, false otherwise * * Since: 0.9.2 **/ @@ -718,17 +750,18 @@ hb_font_t::has_func (unsigned int i) /** * hb_font_get_h_extents: - * @font: a font. - * @extents: (out): + * @font: #hb_font_t to work upon + * @extents: (out): The font extents retrieved * + * Fetches the extents for a specified font, in horizontal + * text segments. * - * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 1.1.3 **/ hb_bool_t -hb_font_get_h_extents (hb_font_t *font, +hb_font_get_h_extents (hb_font_t *font, hb_font_extents_t *extents) { return font->get_font_h_extents (extents); @@ -736,17 +769,18 @@ hb_font_get_h_extents (hb_font_t *font, /** * hb_font_get_v_extents: - * @font: a font. - * @extents: (out): - * + * @font: #hb_font_t to work upon + * @extents: (out): The font extents retrieved * + * Fetches the extents for a specified font, in vertical + * text segments. * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 1.1.3 **/ hb_bool_t -hb_font_get_v_extents (hb_font_t *font, +hb_font_get_v_extents (hb_font_t *font, hb_font_extents_t *extents) { return font->get_font_v_extents (extents); @@ -754,20 +788,25 @@ hb_font_get_v_extents (hb_font_t *font, /** * hb_font_get_glyph: - * @font: a font. - * @unicode: - * @variation_selector: - * @glyph: (out): + * @font: #hb_font_t to work upon + * @unicode: The Unicode code point to query + * @variation_selector: (optional): A variation-selector code point + * @glyph: (out): The glyph ID retrieved * + * Fetches the glyph ID for a Unicode code point in the specified + * font, with an optional variation selector. * + * If @variation_selector is 0, calls hb_font_get_nominal_glyph(); + * otherwise calls hb_font_get_variation_glyph(). * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph (hb_font_t *font, - hb_codepoint_t unicode, hb_codepoint_t variation_selector, +hb_font_get_glyph (hb_font_t *font, + hb_codepoint_t unicode, + hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { if (unlikely (variation_selector)) @@ -777,19 +816,24 @@ hb_font_get_glyph (hb_font_t *font, /** * hb_font_get_nominal_glyph: - * @font: a font. - * @unicode: - * @glyph: (out): + * @font: #hb_font_t to work upon + * @unicode: The Unicode code point to query + * @glyph: (out): The glyph ID retrieved * + * Fetches the nominal glyph ID for a Unicode code point in the + * specified font. * + * This version of the function should not be used to fetch glyph IDs + * for code points modified by variation selectors. For variation-selector + * support, user hb_font_get_variation_glyph() or use hb_font_get_glyph(). * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 1.2.3 **/ hb_bool_t -hb_font_get_nominal_glyph (hb_font_t *font, - hb_codepoint_t unicode, +hb_font_get_nominal_glyph (hb_font_t *font, + hb_codepoint_t unicode, hb_codepoint_t *glyph) { return font->get_nominal_glyph (unicode, glyph); @@ -820,20 +864,23 @@ hb_font_get_nominal_glyphs (hb_font_t *font, /** * hb_font_get_variation_glyph: - * @font: a font. - * @unicode: - * @variation_selector: - * @glyph: (out): + * @font: #hb_font_t to work upon + * @unicode: The Unicode code point to query + * @variation_selector: The variation-selector code point to query + * @glyph: (out): The glyph ID retrieved * + * Fetches the glyph ID for a Unicode code point when followed by + * by the specified variation-selector code point, in the specified + * font. * - * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 1.2.3 **/ hb_bool_t -hb_font_get_variation_glyph (hb_font_t *font, - hb_codepoint_t unicode, hb_codepoint_t variation_selector, +hb_font_get_variation_glyph (hb_font_t *font, + hb_codepoint_t unicode, + hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { return font->get_variation_glyph (unicode, variation_selector, glyph); @@ -841,134 +888,157 @@ hb_font_get_variation_glyph (hb_font_t *font, /** * hb_font_get_glyph_h_advance: - * @font: a font. - * @glyph: - * + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query * + * Fetches the advance for a glyph ID in the specified font, + * for horizontal text segments. * - * Return value: + * Return value: The advance of @glyph within @font * * Since: 0.9.2 **/ hb_position_t -hb_font_get_glyph_h_advance (hb_font_t *font, - hb_codepoint_t glyph) +hb_font_get_glyph_h_advance (hb_font_t *font, + hb_codepoint_t glyph) { return font->get_glyph_h_advance (glyph); } /** * hb_font_get_glyph_v_advance: - * @font: a font. - * @glyph: + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query * + * Fetches the advance for a glyph ID in the specified font, + * for vertical text segments. * - * - * Return value: + * Return value: The advance of @glyph within @font * * Since: 0.9.2 **/ hb_position_t -hb_font_get_glyph_v_advance (hb_font_t *font, - hb_codepoint_t glyph) +hb_font_get_glyph_v_advance (hb_font_t *font, + hb_codepoint_t glyph) { return font->get_glyph_v_advance (glyph); } /** * hb_font_get_glyph_h_advances: - * @font: a font. - * + * @font: #hb_font_t to work upon + * @count: The number of glyph IDs in the sequence queried + * @first_glyph: The first glyph ID to query + * @glyph_stride: The stride between successive glyph IDs + * @first_advance: (out): The first advance retrieved + * @advance_stride: (out): The stride between successive advances * + * Fetches the advances for a sequence of glyph IDs in the specified + * font, for horizontal text segments. * * Since: 1.8.6 **/ void -hb_font_get_glyph_h_advances (hb_font_t* font, - unsigned int count, +hb_font_get_glyph_h_advances (hb_font_t* font, + unsigned int count, const hb_codepoint_t *first_glyph, - unsigned glyph_stride, - hb_position_t *first_advance, - unsigned advance_stride) + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride) { font->get_glyph_h_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_v_advances: - * @font: a font. - * + * @font: #hb_font_t to work upon + * @count: The number of glyph IDs in the sequence queried + * @first_glyph: The first glyph ID to query + * @glyph_stride: The stride between successive glyph IDs + * @first_advance: (out): The first advance retrieved + * @advance_stride: (out): The stride between successive advances * + * Fetches the advances for a sequence of glyph IDs in the specified + * font, for vertical text segments. * * Since: 1.8.6 **/ void -hb_font_get_glyph_v_advances (hb_font_t* font, - unsigned int count, +hb_font_get_glyph_v_advances (hb_font_t* font, + unsigned int count, const hb_codepoint_t *first_glyph, - unsigned glyph_stride, - hb_position_t *first_advance, - unsigned advance_stride) + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride) { font->get_glyph_v_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_h_origin: - * @font: a font. - * @glyph: - * @x: (out): - * @y: (out): - * + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @x: (out): The X coordinate of the origin + * @y: (out): The Y coordinate of the origin * + * Fetches the (X,Y) coordinates of the origin for a glyph ID + * in the specified font, for horizontal text segments. * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_h_origin (hb_font_t *font, - hb_codepoint_t glyph, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_h_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_h_origin (glyph, x, y); } /** * hb_font_get_glyph_v_origin: - * @font: a font. - * @glyph: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @x: (out): The X coordinate of the origin + * @y: (out): The Y coordinate of the origin * + * Fetches the (X,Y) coordinates of the origin for a glyph ID + * in the specified font, for vertical text segments. * - * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_v_origin (hb_font_t *font, - hb_codepoint_t glyph, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_v_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_v_origin (glyph, x, y); } /** * hb_font_get_glyph_h_kerning: - * @font: a font. - * @left_glyph: - * @right_glyph: + * @font: #hb_font_t to work upon + * @left_glyph: The glyph ID of the left glyph in the glyph pair + * @right_glyph: The glyph ID of the right glyph in the glyph pair * + * Fetches the kerning-adjustment value for a glyph-pair in + * the specified font, in horizontal text segments. * + * <note>It handles legacy kerning only (as returned by the corresponding + * #hb_font_funcs_t function).</note> * - * Return value: + * Return value: The kerning adjustment value * * Since: 0.9.2 **/ hb_position_t -hb_font_get_glyph_h_kerning (hb_font_t *font, - hb_codepoint_t left_glyph, hb_codepoint_t right_glyph) +hb_font_get_glyph_h_kerning (hb_font_t *font, + hb_codepoint_t left_glyph, + hb_codepoint_t right_glyph) { return font->get_glyph_h_kerning (left_glyph, right_glyph); } @@ -976,20 +1046,25 @@ hb_font_get_glyph_h_kerning (hb_font_t *font, #ifndef HB_DISABLE_DEPRECATED /** * hb_font_get_glyph_v_kerning: - * @font: a font. - * @top_glyph: - * @bottom_glyph: + * @font: #hb_font_t to work upon + * @top_glyph: The glyph ID of the top glyph in the glyph pair + * @bottom_glyph: The glyph ID of the bottom glyph in the glyph pair * + * Fetches the kerning-adjustment value for a glyph-pair in + * the specified font, in vertical text segments. * + * <note>It handles legacy kerning only (as returned by the corresponding + * #hb_font_funcs_t function).</note> * - * Return value: + * Return value: The kerning adjustment value * * Since: 0.9.2 * Deprecated: 2.0.0 **/ hb_position_t -hb_font_get_glyph_v_kerning (hb_font_t *font, - hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph) +hb_font_get_glyph_v_kerning (hb_font_t *font, + hb_codepoint_t top_glyph, + hb_codepoint_t bottom_glyph) { return font->get_glyph_v_kerning (top_glyph, bottom_glyph); } @@ -997,19 +1072,20 @@ hb_font_get_glyph_v_kerning (hb_font_t *font, /** * hb_font_get_glyph_extents: - * @font: a font. - * @glyph: - * @extents: (out): - * + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @extents: (out): The #hb_glyph_extents_t retrieved * + * Fetches the #hb_glyph_extents_t data for a glyph ID + * in the specified font. * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_extents (hb_font_t *font, - hb_codepoint_t glyph, +hb_font_get_glyph_extents (hb_font_t *font, + hb_codepoint_t glyph, hb_glyph_extents_t *extents) { return font->get_glyph_extents (glyph, extents); @@ -1017,63 +1093,70 @@ hb_font_get_glyph_extents (hb_font_t *font, /** * hb_font_get_glyph_contour_point: - * @font: a font. - * @glyph: - * @point_index: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @point_index: The contour-point index to query + * @x: (out): The X value retrieved for the contour point + * @y: (out): The Y value retrieved for the contour point * + * Fetches the (x,y) coordinates of a specified contour-point index + * in the specified glyph, within the specified font. * - * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_contour_point (hb_font_t *font, - hb_codepoint_t glyph, unsigned int point_index, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_contour_point (hb_font_t *font, + hb_codepoint_t glyph, + unsigned int point_index, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_contour_point (glyph, point_index, x, y); } /** * hb_font_get_glyph_name: - * @font: a font. - * @glyph: - * @name: (array length=size): - * @size: + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @name: (out) (array length=size): Name string retrieved for the glyph ID + * @size: Length of the glyph-name string retrieved * + * Fetches the glyph-name string for a glyph ID in the specified @font. * - * - * Return value: + * Return value: %true if data found, zero otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_name (hb_font_t *font, - hb_codepoint_t glyph, - char *name, unsigned int size) +hb_font_get_glyph_name (hb_font_t *font, + hb_codepoint_t glyph, + char *name, + unsigned int size) { return font->get_glyph_name (glyph, name, size); } /** * hb_font_get_glyph_from_name: - * @font: a font. - * @name: (array length=len): - * @len: - * @glyph: (out): + * @font: #hb_font_t to work upon + * @name: (array length=len): The name string to query + * @len: The length of the name queried + * @glyph: (out): The glyph ID retrieved * + * Fetches the glyph ID that corresponds to a name string in the specified @font. * + * <note>Note: @len == -1 means the name string is null-terminated.</note> * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_from_name (hb_font_t *font, - const char *name, int len, /* -1 means nul-terminated */ +hb_font_get_glyph_from_name (hb_font_t *font, + const char *name, + int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph) { return font->get_glyph_from_name (name, len, glyph); @@ -1084,164 +1167,211 @@ hb_font_get_glyph_from_name (hb_font_t *font, /** * hb_font_get_extents_for_direction: - * @font: a font. - * @direction: - * @extents: (out): + * @font: #hb_font_t to work upon + * @direction: The direction of the text segment + * @extents: (out): The #hb_glyph_extents_t retrieved * + * Fetches the extents for a font in a text segment of the + * specified direction. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 1.1.3 **/ void -hb_font_get_extents_for_direction (hb_font_t *font, - hb_direction_t direction, +hb_font_get_extents_for_direction (hb_font_t *font, + hb_direction_t direction, hb_font_extents_t *extents) { return font->get_extents_for_direction (direction, extents); } /** * hb_font_get_glyph_advance_for_direction: - * @font: a font. - * @glyph: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @direction: The direction of the text segment + * @x: (out): The horizontal advance retrieved + * @y: (out): The vertical advance retrieved * + * Fetches the advance for a glyph ID from the specified font, + * in a text segment of the specified direction. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void -hb_font_get_glyph_advance_for_direction (hb_font_t *font, - hb_codepoint_t glyph, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_advance_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_advance_for_direction (glyph, direction, x, y); } /** * hb_font_get_glyph_advances_for_direction: - * @font: a font. - * @direction: + * @font: #hb_font_t to work upon + * @direction: The direction of the text segment + * @count: The number of glyph IDs in the sequence queried + * @first_glyph: The first glyph ID to query + * @glyph_stride: The stride between successive glyph IDs + * @first_advance: (out): The first advance retrieved + * @advance_stride: (out): The stride between successive advances * + * Fetches the advances for a sequence of glyph IDs in the specified + * font, in a text segment of the specified direction. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 1.8.6 **/ HB_EXTERN void -hb_font_get_glyph_advances_for_direction (hb_font_t* font, - hb_direction_t direction, - unsigned int count, +hb_font_get_glyph_advances_for_direction (hb_font_t* font, + hb_direction_t direction, + unsigned int count, const hb_codepoint_t *first_glyph, - unsigned glyph_stride, - hb_position_t *first_advance, - unsigned advance_stride) + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride) { font->get_glyph_advances_for_direction (direction, count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_origin_for_direction: - * @font: a font. - * @glyph: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @direction: The direction of the text segment + * @x: (out): The X coordinate retrieved for the origin + * @y: (out): The Y coordinate retrieved for the origin * + * Fetches the (X,Y) coordinates of the origin for a glyph in + * the specified font. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void -hb_font_get_glyph_origin_for_direction (hb_font_t *font, - hb_codepoint_t glyph, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_add_glyph_origin_for_direction: - * @font: a font. - * @glyph: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @direction: The direction of the text segment + * @x: (inout): Input = The original X coordinate + * Output = The X coordinate plus the X-coordinate of the origin + * @y: (inout): Input = The original Y coordinate + * Output = The Y coordinate plus the Y-coordinate of the origin * + * Adds the origin coordinates to an (X,Y) point coordinate, in + * the specified glyph ID in the specified font. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void -hb_font_add_glyph_origin_for_direction (hb_font_t *font, - hb_codepoint_t glyph, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_add_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->add_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_subtract_glyph_origin_for_direction: - * @font: a font. - * @glyph: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @direction: The direction of the text segment + * @x: (inout): Input = The original X coordinate + * Output = The X coordinate minus the X-coordinate of the origin + * @y: (inout): Input = The original Y coordinate + * Output = The Y coordinate minus the Y-coordinate of the origin * + * Subtracts the origin coordinates from an (X,Y) point coordinate, + * in the specified glyph ID in the specified font. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void -hb_font_subtract_glyph_origin_for_direction (hb_font_t *font, - hb_codepoint_t glyph, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_subtract_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->subtract_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_get_glyph_kerning_for_direction: - * @font: a font. - * @first_glyph: - * @second_glyph: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @first_glyph: The glyph ID of the first glyph in the glyph pair to query + * @second_glyph: The glyph ID of the second glyph in the glyph pair to query + * @direction: The direction of the text segment + * @x: (out): The horizontal kerning-adjustment value retrieved + * @y: (out): The vertical kerning-adjustment value retrieved * + * Fetches the kerning-adjustment value for a glyph-pair in the specified font. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void -hb_font_get_glyph_kerning_for_direction (hb_font_t *font, - hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_kerning_for_direction (hb_font_t *font, + hb_codepoint_t first_glyph, + hb_codepoint_t second_glyph, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y); } /** * hb_font_get_glyph_extents_for_origin: - * @font: a font. - * @glyph: - * @direction: - * @extents: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @direction: The direction of the text segment + * @extents: (out): The #hb_glyph_extents_t retrieved * + * Fetches the #hb_glyph_extents_t data for a glyph ID + * in the specified font, with respect to the origin in + * a text segment in the specified direction. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_extents_for_origin (hb_font_t *font, - hb_codepoint_t glyph, - hb_direction_t direction, +hb_font_get_glyph_extents_for_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, hb_glyph_extents_t *extents) { return font->get_glyph_extents_for_origin (glyph, direction, extents); @@ -1249,65 +1379,79 @@ hb_font_get_glyph_extents_for_origin (hb_font_t *font, /** * hb_font_get_glyph_contour_point_for_origin: - * @font: a font. - * @glyph: - * @point_index: - * @direction: - * @x: (out): - * @y: (out): + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @point_index: The contour-point index to query + * @direction: The direction of the text segment + * @x: (out): The X value retrieved for the contour point + * @y: (out): The Y value retrieved for the contour point * + * Fetches the (X,Y) coordinates of a specified contour-point index + * in the specified glyph ID in the specified font, with respect + * to the origin in a text segment in the specified direction. * + * Calls the appropriate direction-specific variant (horizontal + * or vertical) depending on the value of @direction. * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_get_glyph_contour_point_for_origin (hb_font_t *font, - hb_codepoint_t glyph, unsigned int point_index, - hb_direction_t direction, - hb_position_t *x, hb_position_t *y) +hb_font_get_glyph_contour_point_for_origin (hb_font_t *font, + hb_codepoint_t glyph, + unsigned int point_index, + hb_direction_t direction, + hb_position_t *x, + hb_position_t *y) { return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y); } -/* Generates gidDDD if glyph has no name. */ /** * hb_font_glyph_to_string: - * @font: a font. - * @glyph: - * @s: (array length=size): - * @size: + * @font: #hb_font_t to work upon + * @glyph: The glyph ID to query + * @s: (out) (array length=size): The string containing the glyph name + * @size: Length of string @s * + * Fetches the name of the specified glyph ID in @font and returns + * it in string @s. * + * If the glyph ID has no name in @font, a string of the form `gidDDD` is + * generated, with `DDD` being the glyph ID. * * Since: 0.9.2 **/ void -hb_font_glyph_to_string (hb_font_t *font, - hb_codepoint_t glyph, - char *s, unsigned int size) +hb_font_glyph_to_string (hb_font_t *font, + hb_codepoint_t glyph, + char *s, + unsigned int size) { font->glyph_to_string (glyph, s, size); } -/* Parses gidDDD and uniUUUU strings automatically. */ /** * hb_font_glyph_from_string: - * @font: a font. - * @s: (array length=len) (element-type uint8_t): - * @len: - * @glyph: (out): + * @font: #hb_font_t to work upon + * @s: (array length=len) (element-type uint8_t): string to query + * @len: The length of the string @s + * @glyph: (out): The glyph ID corresponding to the string requested * + * Fetches the glyph ID from @font that matches the specified string. + * Strings of the format `gidDDD` or `uniUUUU` are parsed automatically. * + * <note>Note: @len == -1 means the string is null-terminated.</note> * - * Return value: + * Return value: %true if data found, false otherwise * * Since: 0.9.2 **/ hb_bool_t -hb_font_glyph_from_string (hb_font_t *font, - const char *s, int len, /* -1 means nul-terminated */ +hb_font_glyph_from_string (hb_font_t *font, + const char *s, + int len, hb_codepoint_t *glyph) { return font->glyph_from_string (s, len, glyph); @@ -1369,9 +1513,9 @@ _hb_font_create (hb_face_t *face) * hb_font_create: (Xconstructor) * @face: a face. * + * Constructs a new font object from the specified face. * - * - * Return value: (transfer full): + * Return value: (transfer full): The new font object * * Since: 0.9.2 **/ @@ -1404,11 +1548,12 @@ _hb_font_adopt_var_coords (hb_font_t *font, /** * hb_font_create_sub_font: - * @parent: parent font. - * + * @parent: The parent font object * + * Constructs a sub-font font object from the specified @parent font, + * replicating the parent's properties. * - * Return value: (transfer full): + * Return value: (transfer full): The new sub-font font object * * Since: 0.9.2 **/ @@ -1456,9 +1601,9 @@ hb_font_create_sub_font (hb_font_t *parent) /** * hb_font_get_empty: * + * Fetches the empty font object. * - * - * Return value: (transfer full) + * Return value: (transfer full): The empty font object * * Since: 0.9.2 **/ @@ -1470,11 +1615,11 @@ hb_font_get_empty () /** * hb_font_reference: (skip) - * @font: a font. + * @font: #hb_font_t to work upon * + * Increases the reference count on the given font object. * - * - * Return value: (transfer full): + * Return value: (transfer full): The @font object * * Since: 0.9.2 **/ @@ -1486,9 +1631,11 @@ hb_font_reference (hb_font_t *font) /** * hb_font_destroy: (skip) - * @font: a font. - * + * @font: #hb_font_t to work upon * + * Decreases the reference count on the given font object. When the + * reference count reaches zero, the font is destroyed, + * freeing all memory. * * Since: 0.9.2 **/ @@ -1514,13 +1661,13 @@ hb_font_destroy (hb_font_t *font) /** * hb_font_set_user_data: (skip) - * @font: a font. - * @key: - * @data: - * @destroy: - * @replace: - * + * @font: #hb_font_t to work upon + * @key: The user-data key + * @data: A pointer to the user data + * @destroy: (optional): 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 font object. * * Return value: * @@ -1530,7 +1677,7 @@ hb_bool_t hb_font_set_user_data (hb_font_t *font, hb_user_data_key_t *key, void * data, - hb_destroy_func_t destroy, + hb_destroy_func_t destroy /* May be NULL. */, hb_bool_t replace) { return hb_object_set_user_data (font, key, data, destroy, replace); @@ -1538,12 +1685,13 @@ hb_font_set_user_data (hb_font_t *font, /** * hb_font_get_user_data: (skip) - * @font: a font. - * @key: + * @font: #hb_font_t to work upon + * @key: The user-data key to query * + * Fetches the user-data object associated with the specified key, + * attached to the specified font object. * - * - * Return value: (transfer none): + * Return value: (transfer none): Pointer to the user data * * Since: 0.9.2 **/ @@ -1556,9 +1704,9 @@ hb_font_get_user_data (hb_font_t *font, /** * hb_font_make_immutable: - * @font: a font. - * + * @font: #hb_font_t to work upon * + * Makes @font immutable. * * Since: 0.9.2 **/ @@ -1576,11 +1724,11 @@ hb_font_make_immutable (hb_font_t *font) /** * hb_font_is_immutable: - * @font: a font. + * @font: #hb_font_t to work upon * + * Tests whether a font object is immutable. * - * - * Return value: + * Return value: %true if @font is immutable, false otherwise * * Since: 0.9.2 **/ @@ -1592,10 +1740,10 @@ hb_font_is_immutable (hb_font_t *font) /** * hb_font_set_parent: - * @font: a font. - * @parent: new parent. + * @font: #hb_font_t to work upon + * @parent: The parent font object to assign * - * Sets parent font of @font. + * Sets the parent font of @font. * * Since: 1.0.5 **/ @@ -1618,11 +1766,11 @@ hb_font_set_parent (hb_font_t *font, /** * hb_font_get_parent: - * @font: a font. + * @font: #hb_font_t to work upon * + * Fetches the parent font of @font. * - * - * Return value: (transfer none): + * Return value: (transfer none): The parent font object * * Since: 0.9.2 **/ @@ -1634,10 +1782,10 @@ hb_font_get_parent (hb_font_t *font) /** * hb_font_set_face: - * @font: a font. - * @face: new face. + * @font: #hb_font_t to work upon + * @face: The #hb_face_t to assign * - * Sets font-face of @font. + * Sets @face as the font-face value of @font. * * Since: 1.4.3 **/ @@ -1662,11 +1810,11 @@ hb_font_set_face (hb_font_t *font, /** * hb_font_get_face: - * @font: a font. - * + * @font: #hb_font_t to work upon * + * Fetches the face associated with the specified font object. * - * Return value: (transfer none): + * Return value: (transfer none): The #hb_face_t value * * Since: 0.9.2 **/ @@ -1679,12 +1827,13 @@ hb_font_get_face (hb_font_t *font) /** * hb_font_set_funcs: - * @font: a font. + * @font: #hb_font_t to work upon * @klass: (closure font_data) (destroy destroy) (scope notified): - * @font_data: - * @destroy: - * + * @font_data: Data to attach to @font + * @destroy: (optional): The function to call when @font_data is not needed anymore * + * Replaces the font-functions structure attached to a font, updating + * the font's user-data with @font-data and the @destroy callback. * * Since: 0.9.2 **/ @@ -1692,7 +1841,7 @@ void hb_font_set_funcs (hb_font_t *font, hb_font_funcs_t *klass, void *font_data, - hb_destroy_func_t destroy) + hb_destroy_func_t destroy /* May be NULL. */) { if (hb_object_is_immutable (font)) { @@ -1716,18 +1865,19 @@ hb_font_set_funcs (hb_font_t *font, /** * hb_font_set_funcs_data: - * @font: a font. - * @font_data: (destroy destroy) (scope notified): - * @destroy: - * + * @font: #hb_font_t to work upon + * @font_data: (destroy destroy) (scope notified): Data to attach to @font + * @destroy: (optional): The function to call when @font_data is not needed anymore * + * Replaces the user data attached to a font, updating the font's + * @destroy callback. * * Since: 0.9.2 **/ void hb_font_set_funcs_data (hb_font_t *font, - void *font_data, - hb_destroy_func_t destroy) + void *font_data, + hb_destroy_func_t destroy /* May be NULL. */) { /* Destroy user_data? */ if (hb_object_is_immutable (font)) @@ -1747,18 +1897,18 @@ hb_font_set_funcs_data (hb_font_t *font, /** * hb_font_set_scale: - * @font: a font. - * @x_scale: - * @y_scale: - * + * @font: #hb_font_t to work upon + * @x_scale: Horizontal scale value to assign + * @y_scale: Vertical scale value to assign * + * Sets the horizontal and vertical scale of a font. * * Since: 0.9.2 **/ void hb_font_set_scale (hb_font_t *font, - int x_scale, - int y_scale) + int x_scale, + int y_scale) { if (hb_object_is_immutable (font)) return; @@ -1770,18 +1920,18 @@ hb_font_set_scale (hb_font_t *font, /** * hb_font_get_scale: - * @font: a font. - * @x_scale: (out): - * @y_scale: (out): - * + * @font: #hb_font_t to work upon + * @x_scale: (out): Horizontal scale value + * @y_scale: (out): Vertical scale value * + * Fetches the horizontal and vertical scale of a font. * * Since: 0.9.2 **/ void hb_font_get_scale (hb_font_t *font, - int *x_scale, - int *y_scale) + int *x_scale, + int *y_scale) { if (x_scale) *x_scale = font->x_scale; if (y_scale) *y_scale = font->y_scale; @@ -1789,18 +1939,18 @@ hb_font_get_scale (hb_font_t *font, /** * hb_font_set_ppem: - * @font: a font. - * @x_ppem: - * @y_ppem: - * + * @font: #hb_font_t to work upon + * @x_ppem: Horizontal ppem value to assign + * @y_ppem: Vertical ppem value to assign * + * Sets the horizontal and vertical pixels-per-em (ppem) of a font. * * Since: 0.9.2 **/ void -hb_font_set_ppem (hb_font_t *font, - unsigned int x_ppem, - unsigned int y_ppem) +hb_font_set_ppem (hb_font_t *font, + unsigned int x_ppem, + unsigned int y_ppem) { if (hb_object_is_immutable (font)) return; @@ -1811,16 +1961,16 @@ hb_font_set_ppem (hb_font_t *font, /** * hb_font_get_ppem: - * @font: a font. - * @x_ppem: (out): - * @y_ppem: (out): - * + * @font: #hb_font_t to work upon + * @x_ppem: (out): Horizontal ppem value + * @y_ppem: (out): Vertical ppem value * + * Fetches the horizontal and vertical points-per-em (ppem) of a font. * * Since: 0.9.2 **/ void -hb_font_get_ppem (hb_font_t *font, +hb_font_get_ppem (hb_font_t *font, unsigned int *x_ppem, unsigned int *y_ppem) { @@ -1830,17 +1980,19 @@ hb_font_get_ppem (hb_font_t *font, /** * hb_font_set_ptem: - * @font: a font. + * @font: #hb_font_t to work upon * @ptem: font size in points. * - * Sets "point size" of the font. Set to 0 to unset. + * Sets the "point size" of a font. Set to zero to unset. + * Used in CoreText to implement optical sizing. * - * There are 72 points in an inch. + * <note>Note: There are 72 points in an inch.</note> * * Since: 1.6.0 **/ void -hb_font_set_ptem (hb_font_t *font, float ptem) +hb_font_set_ptem (hb_font_t *font, + float ptem) { if (hb_object_is_immutable (font)) return; @@ -1850,11 +2002,12 @@ hb_font_set_ptem (hb_font_t *font, float ptem) /** * hb_font_get_ptem: - * @font: a font. + * @font: #hb_font_t to work upon * - * Gets the "point size" of the font. A value of 0 means unset. + * Fetches the "point size" of a font. Used in CoreText to + * implement optical sizing. * - * Return value: Point size. + * Return value: Point size. A value of zero means "not set." * * Since: 0.9.2 **/ @@ -1871,13 +2024,18 @@ hb_font_get_ptem (hb_font_t *font) /** * hb_font_set_variations: + * @font: #hb_font_t to work upon + * @variations: (array length=variations_length): Array of variation settings to apply + * @variations_length: Number of variations to apply + * + * Applies a list of font-variation settings to a font. * * Since: 1.4.2 */ void -hb_font_set_variations (hb_font_t *font, +hb_font_set_variations (hb_font_t *font, const hb_variation_t *variations, - unsigned int variations_length) + unsigned int variations_length) { if (hb_object_is_immutable (font)) return; @@ -1919,13 +2077,19 @@ hb_font_set_variations (hb_font_t *font, /** * hb_font_set_var_coords_design: + * @font: #hb_font_t to work upon + * @coords: (array length=coords_length): Array of variation coordinates to apply + * @coords_length: Number of coordinates to apply + * + * Applies a list of variation coordinates (in design-space units) + * to a font. * * Since: 1.4.2 */ void -hb_font_set_var_coords_design (hb_font_t *font, - const float *coords, - unsigned int coords_length) +hb_font_set_var_coords_design (hb_font_t *font, + const float *coords, + unsigned int coords_length) { if (hb_object_is_immutable (font)) return; @@ -1976,13 +2140,21 @@ hb_font_set_var_named_instance (hb_font_t *font, /** * hb_font_set_var_coords_normalized: + * @font: #hb_font_t to work upon + * @coords: (array length=coords_length): Array of variation coordinates to apply + * @coords_length: Number of coordinates to apply + * + * Applies a list of variation coordinates (in normalized units) + * to a font. + * + * <note>Note: Coordinates should be normalized to 2.14.</note> * * Since: 1.4.2 */ void -hb_font_set_var_coords_normalized (hb_font_t *font, - const int *coords, /* 2.14 normalized */ - unsigned int coords_length) +hb_font_set_var_coords_normalized (hb_font_t *font, + const int *coords, /* 2.14 normalized */ + unsigned int coords_length) { if (hb_object_is_immutable (font)) return; @@ -2016,6 +2188,11 @@ hb_font_set_var_coords_normalized (hb_font_t *font, /** * hb_font_get_var_coords_normalized: + * @font: #hb_font_t to work upon + * @length: Number of coordinates retrieved + * + * Fetches the list of normalized variation coordinates currently + * set on a font. * * Return value is valid as long as variation coordinates of the font * are not modified. @@ -2023,7 +2200,7 @@ hb_font_set_var_coords_normalized (hb_font_t *font, * Since: 1.4.2 */ const int * -hb_font_get_var_coords_normalized (hb_font_t *font, +hb_font_get_var_coords_normalized (hb_font_t *font, unsigned int *length) { if (length) @@ -2115,23 +2292,23 @@ trampoline_destroy (void *user_data) typedef hb_trampoline_t<hb_font_get_glyph_func_t> hb_font_get_glyph_trampoline_t; static hb_bool_t -hb_font_get_nominal_glyph_trampoline (hb_font_t *font, - void *font_data, - hb_codepoint_t unicode, +hb_font_get_nominal_glyph_trampoline (hb_font_t *font, + void *font_data, + hb_codepoint_t unicode, hb_codepoint_t *glyph, - void *user_data) + void *user_data) { hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data; return trampoline->func (font, font_data, unicode, 0, glyph, trampoline->closure.user_data); } static hb_bool_t -hb_font_get_variation_glyph_trampoline (hb_font_t *font, - void *font_data, - hb_codepoint_t unicode, - hb_codepoint_t variation_selector, +hb_font_get_variation_glyph_trampoline (hb_font_t *font, + void *font_data, + hb_codepoint_t unicode, + hb_codepoint_t variation_selector, hb_codepoint_t *glyph, - void *user_data) + void *user_data) { hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data; return trampoline->func (font, font_data, unicode, variation_selector, glyph, trampoline->closure.user_data); @@ -2139,10 +2316,10 @@ hb_font_get_variation_glyph_trampoline (hb_font_t *font, /** * hb_font_funcs_set_glyph_func: - * @ffuncs: font functions. - * @func: (closure user_data) (destroy destroy) (scope notified): callback function. - * @user_data: data to pass to @func. - * @destroy: function to call when @user_data is not needed anymore. + * @ffuncs: The font-functions structure + * @func: (closure user_data) (destroy destroy) (scope notified): callback function + * @user_data: data to pass to @func + * @destroy: (optional): function to call when @user_data is not needed anymore * * Deprecated. Use hb_font_funcs_set_nominal_glyph_func() and * hb_font_funcs_set_variation_glyph_func() instead. @@ -2151,9 +2328,10 @@ hb_font_get_variation_glyph_trampoline (hb_font_t *font, * Deprecated: 1.2.3 **/ void -hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs, - hb_font_get_glyph_func_t func, - void *user_data, hb_destroy_func_t destroy) +hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_func_t func, + void *user_data, + hb_destroy_func_t destroy /* May be NULL. */) { if (hb_object_is_immutable (ffuncs)) { |