| /* |
| * Copyright © 2009 Red Hat, Inc. |
| * Copyright © 2012 Google, Inc. |
| * |
| * 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. |
| * |
| * Red Hat Author(s): Behdad Esfahbod |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #include "hb.hh" |
| |
| #include "hb-font.hh" |
| #include "hb-draw.hh" |
| #include "hb-paint.hh" |
| #include "hb-machinery.hh" |
| |
| #include "hb-ot.h" |
| |
| #include "hb-ot-var-avar-table.hh" |
| #include "hb-ot-var-fvar-table.hh" |
| |
| |
| /** |
| * SECTION:hb-font |
| * @title: hb-font |
| * @short_description: Font objects |
| * @include: hb.h |
| * |
| * 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. |
| **/ |
| |
| |
| /* |
| * hb_font_funcs_t |
| */ |
| |
| static hb_bool_t |
| 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) |
| { |
| hb_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_extents_t *extents, |
| void *user_data HB_UNUSED) |
| { |
| hb_bool_t ret = font->parent->get_font_h_extents (extents); |
| if (ret) { |
| extents->ascender = font->parent_scale_y_distance (extents->ascender); |
| extents->descender = font->parent_scale_y_distance (extents->descender); |
| extents->line_gap = font->parent_scale_y_distance (extents->line_gap); |
| } |
| return ret; |
| } |
| |
| static hb_bool_t |
| 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) |
| { |
| hb_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_extents_t *extents, |
| void *user_data HB_UNUSED) |
| { |
| hb_bool_t ret = font->parent->get_font_v_extents (extents); |
| if (ret) { |
| extents->ascender = font->parent_scale_x_distance (extents->ascender); |
| extents->descender = font->parent_scale_x_distance (extents->descender); |
| extents->line_gap = font->parent_scale_x_distance (extents->line_gap); |
| } |
| return ret; |
| } |
| |
| 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_codepoint_t *glyph, |
| 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_codepoint_t *glyph, |
| void *user_data HB_UNUSED) |
| { |
| if (font->has_nominal_glyphs_func_set ()) |
| { |
| return font->get_nominal_glyphs (1, &unicode, 0, glyph, 0); |
| } |
| return font->parent->get_nominal_glyph (unicode, glyph); |
| } |
| |
| #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, |
| const hb_codepoint_t *first_unicode, |
| 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 ()) |
| { |
| for (unsigned int i = 0; i < count; i++) |
| { |
| if (!font->get_nominal_glyph (*first_unicode, first_glyph)) |
| return i; |
| |
| first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| } |
| return count; |
| } |
| |
| return font->parent->get_nominal_glyphs (count, |
| first_unicode, unicode_stride, |
| first_glyph, glyph_stride); |
| } |
| |
| 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_codepoint_t *glyph, |
| 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_codepoint_t *glyph, |
| 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) |
| { |
| 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) |
| { |
| if (font->has_glyph_h_advances_func_set ()) |
| { |
| hb_position_t ret; |
| font->get_glyph_h_advances (1, &glyph, 0, &ret, 0); |
| return ret; |
| } |
| return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph)); |
| } |
| |
| 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) |
| { |
| /* 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) |
| { |
| if (font->has_glyph_v_advances_func_set ()) |
| { |
| hb_position_t ret; |
| font->get_glyph_v_advances (1, &glyph, 0, &ret, 0); |
| return ret; |
| } |
| return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph)); |
| } |
| |
| #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, |
| const hb_codepoint_t *first_glyph, |
| 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 ()) |
| { |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->get_glyph_h_advance (*first_glyph); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| font->parent->get_glyph_h_advances (count, |
| first_glyph, glyph_stride, |
| first_advance, advance_stride); |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->parent_scale_x_distance (*first_advance); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| } |
| |
| #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, |
| const hb_codepoint_t *first_glyph, |
| 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 ()) |
| { |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->get_glyph_v_advance (*first_glyph); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| font->parent->get_glyph_v_advances (count, |
| first_glyph, glyph_stride, |
| first_advance, advance_stride); |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->parent_scale_y_distance (*first_advance); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| } |
| |
| 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) |
| { |
| *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_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y); |
| if (ret) |
| font->parent_scale_position (x, y); |
| return ret; |
| } |
| |
| 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) |
| { |
| *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_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y); |
| if (ret) |
| font->parent_scale_position (x, y); |
| return ret; |
| } |
| |
| 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) |
| { |
| 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) |
| { |
| 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) |
| { |
| 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) |
| { |
| 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_glyph_extents_t *extents, |
| void *user_data HB_UNUSED) |
| { |
| hb_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_glyph_extents_t *extents, |
| void *user_data HB_UNUSED) |
| { |
| hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents); |
| if (ret) { |
| font->parent_scale_position (&extents->x_bearing, &extents->y_bearing); |
| font->parent_scale_distance (&extents->width, &extents->height); |
| } |
| return ret; |
| } |
| |
| 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) |
| { |
| *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_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y); |
| if (ret) |
| font->parent_scale_position (x, y); |
| return ret; |
| } |
| |
| 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) |
| { |
| 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) |
| { |
| 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_codepoint_t *glyph, |
| 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_codepoint_t *glyph, |
| void *user_data HB_UNUSED) |
| { |
| return font->parent->get_glyph_from_name (name, len, glyph); |
| } |
| |
| static void |
| hb_font_draw_glyph_nil (hb_font_t *font HB_UNUSED, |
| void *font_data HB_UNUSED, |
| hb_codepoint_t glyph, |
| hb_draw_funcs_t *draw_funcs, |
| void *draw_data, |
| void *user_data HB_UNUSED) |
| { |
| } |
| |
| static void |
| hb_font_paint_glyph_nil (hb_font_t *font HB_UNUSED, |
| void *font_data HB_UNUSED, |
| hb_codepoint_t glyph HB_UNUSED, |
| hb_paint_funcs_t *paint_funcs HB_UNUSED, |
| void *paint_data HB_UNUSED, |
| unsigned int palette HB_UNUSED, |
| hb_color_t foreground HB_UNUSED, |
| void *user_data HB_UNUSED) |
| { |
| } |
| |
| typedef struct hb_font_draw_glyph_default_adaptor_t { |
| hb_draw_funcs_t *draw_funcs; |
| void *draw_data; |
| float x_scale; |
| float y_scale; |
| float slant; |
| } hb_font_draw_glyph_default_adaptor_t; |
| |
| static void |
| hb_draw_move_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, |
| void *draw_data, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data HB_UNUSED) |
| { |
| hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; |
| float x_scale = adaptor->x_scale; |
| float y_scale = adaptor->y_scale; |
| float slant = adaptor->slant; |
| |
| adaptor->draw_funcs->emit_move_to (adaptor->draw_data, *st, |
| x_scale * to_x + slant * to_y, y_scale * to_y); |
| } |
| |
| static void |
| hb_draw_line_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data HB_UNUSED) |
| { |
| hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; |
| float x_scale = adaptor->x_scale; |
| float y_scale = adaptor->y_scale; |
| float slant = adaptor->slant; |
| |
| st->current_x = st->current_x * x_scale + st->current_y * slant; |
| st->current_y = st->current_y * y_scale; |
| |
| adaptor->draw_funcs->emit_line_to (adaptor->draw_data, *st, |
| x_scale * to_x + slant * to_y, y_scale * to_y); |
| } |
| |
| static void |
| hb_draw_quadratic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, 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) |
| { |
| hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; |
| float x_scale = adaptor->x_scale; |
| float y_scale = adaptor->y_scale; |
| float slant = adaptor->slant; |
| |
| st->current_x = st->current_x * x_scale + st->current_y * slant; |
| st->current_y = st->current_y * y_scale; |
| |
| adaptor->draw_funcs->emit_quadratic_to (adaptor->draw_data, *st, |
| x_scale * control_x + slant * control_y, y_scale * control_y, |
| x_scale * to_x + slant * to_y, y_scale * to_y); |
| } |
| |
| static void |
| hb_draw_cubic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, 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_UNUSED) |
| { |
| hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; |
| float x_scale = adaptor->x_scale; |
| float y_scale = adaptor->y_scale; |
| float slant = adaptor->slant; |
| |
| st->current_x = st->current_x * x_scale + st->current_y * slant; |
| st->current_y = st->current_y * y_scale; |
| |
| adaptor->draw_funcs->emit_cubic_to (adaptor->draw_data, *st, |
| x_scale * control1_x + slant * control1_y, y_scale * control1_y, |
| x_scale * control2_x + slant * control2_y, y_scale * control2_y, |
| x_scale * to_x + slant * to_y, y_scale * to_y); |
| } |
| |
| static void |
| hb_draw_close_path_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, |
| hb_draw_state_t *st, |
| void *user_data HB_UNUSED) |
| { |
| hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; |
| |
| adaptor->draw_funcs->emit_close_path (adaptor->draw_data, *st); |
| } |
| |
| static const hb_draw_funcs_t _hb_draw_funcs_default = { |
| HB_OBJECT_HEADER_STATIC, |
| |
| { |
| #define HB_DRAW_FUNC_IMPLEMENT(name) hb_draw_##name##_default, |
| HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS |
| #undef HB_DRAW_FUNC_IMPLEMENT |
| } |
| }; |
| |
| static void |
| hb_font_draw_glyph_default (hb_font_t *font, |
| void *font_data HB_UNUSED, |
| hb_codepoint_t glyph, |
| hb_draw_funcs_t *draw_funcs, |
| void *draw_data, |
| void *user_data HB_UNUSED) |
| { |
| hb_font_draw_glyph_default_adaptor_t adaptor = { |
| draw_funcs, |
| draw_data, |
| font->parent->x_scale ? (float) font->x_scale / (float) font->parent->x_scale : 0.f, |
| font->parent->y_scale ? (float) font->y_scale / (float) font->parent->y_scale : 0.f, |
| font->parent->y_scale ? (font->slant - font->parent->slant) * |
| (float) font->x_scale / (float) font->parent->y_scale : 0.f |
| }; |
| |
| font->parent->draw_glyph (glyph, |
| const_cast<hb_draw_funcs_t *> (&_hb_draw_funcs_default), |
| &adaptor); |
| } |
| |
| static void |
| hb_font_paint_glyph_default (hb_font_t *font, |
| void *font_data, |
| hb_codepoint_t glyph, |
| hb_paint_funcs_t *paint_funcs, |
| void *paint_data, |
| unsigned int palette, |
| hb_color_t foreground, |
| void *user_data) |
| { |
| paint_funcs->push_transform (paint_data, |
| font->parent->x_scale ? (float) font->x_scale / (float) font->parent->x_scale : 0.f, |
| font->parent->y_scale ? (font->slant - font->parent->slant) * |
| (float) font->x_scale / (float) font->parent->y_scale : 0.f, |
| 0.f, |
| font->parent->y_scale ? (float) font->y_scale / (float) font->parent->y_scale : 0.f, |
| 0.f, 0.f); |
| |
| font->parent->paint_glyph (glyph, paint_funcs, paint_data, palette, foreground); |
| |
| paint_funcs->pop_transform (paint_data); |
| } |
| |
| DEFINE_NULL_INSTANCE (hb_font_funcs_t) = |
| { |
| HB_OBJECT_HEADER_STATIC, |
| |
| nullptr, |
| nullptr, |
| { |
| { |
| #define HB_FONT_FUNC_IMPLEMENT(get_,name) hb_font_##get_##name##_nil, |
| HB_FONT_FUNCS_IMPLEMENT_CALLBACKS |
| #undef HB_FONT_FUNC_IMPLEMENT |
| } |
| } |
| }; |
| |
| static const hb_font_funcs_t _hb_font_funcs_default = { |
| HB_OBJECT_HEADER_STATIC, |
| |
| nullptr, |
| nullptr, |
| { |
| { |
| #define HB_FONT_FUNC_IMPLEMENT(get_,name) hb_font_##get_##name##_default, |
| HB_FONT_FUNCS_IMPLEMENT_CALLBACKS |
| #undef HB_FONT_FUNC_IMPLEMENT |
| } |
| } |
| }; |
| |
| |
| /** |
| * hb_font_funcs_create: |
| * |
| * Creates a new #hb_font_funcs_t structure of font functions. |
| * |
| * Return value: (transfer full): The font-functions structure |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_funcs_t * |
| hb_font_funcs_create () |
| { |
| hb_font_funcs_t *ffuncs; |
| |
| if (!(ffuncs = hb_object_create<hb_font_funcs_t> ())) |
| return hb_font_funcs_get_empty (); |
| |
| ffuncs->get = _hb_font_funcs_default.get; |
| |
| return ffuncs; |
| } |
| |
| /** |
| * hb_font_funcs_get_empty: |
| * |
| * Fetches an empty font-functions structure. |
| * |
| * Return value: (transfer full): The font-functions structure |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_funcs_t * |
| hb_font_funcs_get_empty () |
| { |
| return const_cast<hb_font_funcs_t *> (&_hb_font_funcs_default); |
| } |
| |
| /** |
| * hb_font_funcs_reference: (skip) |
| * @ffuncs: The font-functions structure |
| * |
| * Increases the reference count on a font-functions structure. |
| * |
| * Return value: The font-functions structure |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_funcs_t * |
| hb_font_funcs_reference (hb_font_funcs_t *ffuncs) |
| { |
| return hb_object_reference (ffuncs); |
| } |
| |
| /** |
| * hb_font_funcs_destroy: (skip) |
| * @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 |
| **/ |
| void |
| hb_font_funcs_destroy (hb_font_funcs_t *ffuncs) |
| { |
| if (!hb_object_destroy (ffuncs)) return; |
| |
| if (ffuncs->destroy) |
| { |
| #define HB_FONT_FUNC_IMPLEMENT(get_,name) if (ffuncs->destroy->name) \ |
| ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name); |
| HB_FONT_FUNCS_IMPLEMENT_CALLBACKS |
| #undef HB_FONT_FUNC_IMPLEMENT |
| } |
| |
| hb_free (ffuncs->destroy); |
| hb_free (ffuncs->user_data); |
| |
| hb_free (ffuncs); |
| } |
| |
| /** |
| * hb_font_funcs_set_user_data: (skip) |
| * @ffuncs: The font-functions structure |
| * @key: The user-data key to set |
| * @data: A pointer to the user data set |
| * @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 font-functions structure. |
| * |
| * Return value: `true` if success, `false` otherwise |
| * |
| * Since: 0.9.2 |
| **/ |
| 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 /* May be NULL. */, |
| hb_bool_t replace) |
| { |
| return hb_object_set_user_data (ffuncs, key, data, destroy, replace); |
| } |
| |
| /** |
| * hb_font_funcs_get_user_data: (skip) |
| * @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): A pointer to the user data |
| * |
| * Since: 0.9.2 |
| **/ |
| void * |
| hb_font_funcs_get_user_data (const hb_font_funcs_t *ffuncs, |
| hb_user_data_key_t *key) |
| { |
| return hb_object_get_user_data (ffuncs, key); |
| } |
| |
| |
| /** |
| * hb_font_funcs_make_immutable: |
| * @ffuncs: The font-functions structure |
| * |
| * Makes a font-functions structure immutable. |
| * |
| * Since: 0.9.2 |
| **/ |
| void |
| hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs) |
| { |
| if (hb_object_is_immutable (ffuncs)) |
| return; |
| |
| hb_object_make_immutable (ffuncs); |
| } |
| |
| /** |
| * hb_font_funcs_is_immutable: |
| * @ffuncs: The font-functions structure |
| * |
| * Tests whether a font-functions structure is immutable. |
| * |
| * Return value: `true` if @ffuncs is immutable, `false` otherwise |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_bool_t |
| hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs) |
| { |
| return hb_object_is_immutable (ffuncs); |
| } |
| |
| |
| static bool |
| _hb_font_funcs_set_preamble (hb_font_funcs_t *ffuncs, |
| bool func_is_null, |
| void **user_data, |
| hb_destroy_func_t *destroy) |
| { |
| if (hb_object_is_immutable (ffuncs)) |
| { |
| 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_font_funcs_set_middle (hb_font_funcs_t *ffuncs, |
| void *user_data, |
| hb_destroy_func_t destroy) |
| { |
| if (user_data && !ffuncs->user_data) |
| { |
| ffuncs->user_data = (decltype (ffuncs->user_data)) hb_calloc (1, sizeof (*ffuncs->user_data)); |
| if (unlikely (!ffuncs->user_data)) |
| goto fail; |
| } |
| if (destroy && !ffuncs->destroy) |
| { |
| ffuncs->destroy = (decltype (ffuncs->destroy)) hb_calloc (1, sizeof (*ffuncs->destroy)); |
| if (unlikely (!ffuncs->destroy)) |
| goto fail; |
| } |
| |
| return true; |
| |
| fail: |
| if (destroy) |
| (destroy) (user_data); |
| return false; |
| } |
| |
| #define HB_FONT_FUNC_IMPLEMENT(get_,name) \ |
| \ |
| void \ |
| hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \ |
| hb_font_##get_##name##_func_t func, \ |
| void *user_data, \ |
| hb_destroy_func_t destroy) \ |
| { \ |
| if (!_hb_font_funcs_set_preamble (ffuncs, !func, &user_data, &destroy))\ |
| return; \ |
| \ |
| if (ffuncs->destroy && ffuncs->destroy->name) \ |
| ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name); \ |
| \ |
| if (!_hb_font_funcs_set_middle (ffuncs, user_data, destroy)) \ |
| return; \ |
| \ |
| if (func) \ |
| ffuncs->get.f.name = func; \ |
| else \ |
| ffuncs->get.f.name = hb_font_##get_##name##_default; \ |
| \ |
| if (ffuncs->user_data) \ |
| ffuncs->user_data->name = user_data; \ |
| if (ffuncs->destroy) \ |
| ffuncs->destroy->name = destroy; \ |
| } |
| |
| HB_FONT_FUNCS_IMPLEMENT_CALLBACKS |
| #undef HB_FONT_FUNC_IMPLEMENT |
| |
| bool |
| hb_font_t::has_func_set (unsigned int i) |
| { |
| return this->klass->get.array[i] != _hb_font_funcs_default.get.array[i]; |
| } |
| |
| bool |
| hb_font_t::has_func (unsigned int i) |
| { |
| return has_func_set (i) || |
| (parent && parent != &_hb_Null_hb_font_t && parent->has_func (i)); |
| } |
| |
| /* Public getters */ |
| |
| /** |
| * hb_font_get_h_extents: |
| * @font: #hb_font_t to work upon |
| * @extents: (out): The font extents retrieved |
| * |
| * Fetches the extents for a specified font, for horizontal |
| * text segments. |
| * |
| * 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_extents_t *extents) |
| { |
| return font->get_font_h_extents (extents); |
| } |
| |
| /** |
| * hb_font_get_v_extents: |
| * @font: #hb_font_t to work upon |
| * @extents: (out): The font extents retrieved |
| * |
| * Fetches the extents for a specified font, for vertical |
| * text segments. |
| * |
| * 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_extents_t *extents) |
| { |
| return font->get_font_v_extents (extents); |
| } |
| |
| /** |
| * hb_font_get_glyph: |
| * @font: #hb_font_t to work upon |
| * @unicode: The Unicode code point to query |
| * @variation_selector: 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: `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_codepoint_t *glyph) |
| { |
| if (unlikely (variation_selector)) |
| return font->get_variation_glyph (unicode, variation_selector, glyph); |
| return font->get_nominal_glyph (unicode, glyph); |
| } |
| |
| /** |
| * hb_font_get_nominal_glyph: |
| * @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: `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_codepoint_t *glyph) |
| { |
| return font->get_nominal_glyph (unicode, glyph); |
| } |
| |
| /** |
| * hb_font_get_nominal_glyphs: |
| * @font: #hb_font_t to work upon |
| * @count: number of code points to query |
| * @first_unicode: The first Unicode code point to query |
| * @unicode_stride: The stride between successive code points |
| * @first_glyph: (out): The first glyph ID retrieved |
| * @glyph_stride: The stride between successive glyph IDs |
| * |
| * Fetches the nominal glyph IDs for a sequence of Unicode code points. Glyph |
| * IDs must be returned in a #hb_codepoint_t output parameter. |
| * |
| * Return value: the number of code points processed |
| * |
| * Since: 2.6.3 |
| **/ |
| unsigned int |
| hb_font_get_nominal_glyphs (hb_font_t *font, |
| unsigned int count, |
| const hb_codepoint_t *first_unicode, |
| unsigned int unicode_stride, |
| hb_codepoint_t *first_glyph, |
| unsigned int glyph_stride) |
| { |
| return font->get_nominal_glyphs (count, |
| first_unicode, unicode_stride, |
| first_glyph, glyph_stride); |
| } |
| |
| /** |
| * hb_font_get_variation_glyph: |
| * @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: `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_codepoint_t *glyph) |
| { |
| return font->get_variation_glyph (unicode, variation_selector, glyph); |
| } |
| |
| /** |
| * hb_font_get_glyph_h_advance: |
| * @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: 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) |
| { |
| return font->get_glyph_h_advance (glyph); |
| } |
| |
| /** |
| * hb_font_get_glyph_v_advance: |
| * @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: 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) |
| { |
| return font->get_glyph_v_advance (glyph); |
| } |
| |
| /** |
| * hb_font_get_glyph_h_advances: |
| * @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: 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, |
| const hb_codepoint_t *first_glyph, |
| 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: #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, |
| const hb_codepoint_t *first_glyph, |
| 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: #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: `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) |
| { |
| return font->get_glyph_h_origin (glyph, x, y); |
| } |
| |
| /** |
| * hb_font_get_glyph_v_origin: |
| * @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: `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) |
| { |
| return font->get_glyph_v_origin (glyph, x, y); |
| } |
| |
| /** |
| * hb_font_get_glyph_h_kerning: |
| * @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, for horizontal text segments. |
| * |
| * <note>It handles legacy kerning only (as returned by the corresponding |
| * #hb_font_funcs_t function).</note> |
| * |
| * 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) |
| { |
| return font->get_glyph_h_kerning (left_glyph, right_glyph); |
| } |
| |
| #ifndef HB_DISABLE_DEPRECATED |
| /** |
| * hb_font_get_glyph_v_kerning: |
| * @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, for vertical text segments. |
| * |
| * <note>It handles legacy kerning only (as returned by the corresponding |
| * #hb_font_funcs_t function).</note> |
| * |
| * 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) |
| { |
| return font->get_glyph_v_kerning (top_glyph, bottom_glyph); |
| } |
| #endif |
| |
| /** |
| * hb_font_get_glyph_extents: |
| * @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: `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_glyph_extents_t *extents) |
| { |
| return font->get_glyph_extents (glyph, extents); |
| } |
| |
| /** |
| * hb_font_get_glyph_contour_point: |
| * @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: `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) |
| { |
| return font->get_glyph_contour_point (glyph, point_index, x, y); |
| } |
| |
| /** |
| * hb_font_get_glyph_name: |
| * @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. |
| * |
| * According to the OpenType specification, glyph names are limited to 63 |
| * characters and can only contain (a subset of) ASCII. |
| * |
| * Return value: `true` if data found, `false` 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) |
| { |
| return font->get_glyph_name (glyph, name, size); |
| } |
| |
| /** |
| * hb_font_get_glyph_from_name: |
| * @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: `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_codepoint_t *glyph) |
| { |
| return font->get_glyph_from_name (name, len, glyph); |
| } |
| |
| /** |
| * hb_font_get_glyph_shape: |
| * @font: #hb_font_t to work upon |
| * @glyph: : The glyph ID |
| * @dfuncs: #hb_draw_funcs_t to draw to |
| * @draw_data: User data to pass to draw callbacks |
| * |
| * Fetches the glyph shape that corresponds to a glyph in the specified @font. |
| * The shape is returned by way of calls to the callbacks of the @dfuncs |
| * objects, with @draw_data passed to them. |
| * |
| * Since: 4.0.0 |
| */ |
| void |
| hb_font_get_glyph_shape (hb_font_t *font, |
| hb_codepoint_t glyph, |
| hb_draw_funcs_t *dfuncs, void *draw_data) |
| { |
| hb_font_draw_glyph (font, glyph, dfuncs, draw_data); |
| } |
| |
| /** |
| * hb_font_draw_glyph: |
| * @font: #hb_font_t to work upon |
| * @glyph: : The glyph ID |
| * @dfuncs: #hb_draw_funcs_t to draw to |
| * @draw_data: User data to pass to draw callbacks |
| * |
| * Draws the outline that corresponds to a glyph in the specified @font. |
| * |
| * The outline is returned by way of calls to the callbacks of the @dfuncs |
| * objects, with @draw_data passed to them. |
| * |
| * Since: REPLACEME |
| **/ |
| void |
| hb_font_draw_glyph (hb_font_t *font, |
| hb_codepoint_t glyph, |
| hb_draw_funcs_t *dfuncs, void *draw_data) |
| { |
| font->draw_glyph (glyph, dfuncs, draw_data); |
| } |
| |
| /** |
| * hb_font_paint_glyph: |
| * @font: #hb_font_t to work upon |
| * @glyph: The glyph ID |
| * @pfuncs: #hb_paint_funcs_t to paint with |
| * @paint_data: User data to pass to paint callbacks |
| * @palette_index: The index of the font's color palette to use |
| * @foreground: The foreground color, unpremultipled |
| * |
| * Paints the glyph. |
| * |
| * The painting instructions are returned by way of calls to |
| * the callbacks of the @funcs object, with @paint_data passed |
| * to them. |
| * |
| * If the font has color palettes (see hb_ot_color_has_palettes()), |
| * then @palette_index selects the palette to use. If the font only |
| * has one palette, this will be 0. |
| * |
| * Since: REPLACEME |
| */ |
| void |
| hb_font_paint_glyph (hb_font_t *font, |
| hb_codepoint_t glyph, |
| hb_paint_funcs_t *pfuncs, void *paint_data, |
| unsigned int palette_index, |
| hb_color_t foreground) |
| { |
| font->paint_glyph (glyph, pfuncs, paint_data, palette_index, foreground); |
| } |
| |
| /* A bit higher-level, and with fallback */ |
| |
| /** |
| * hb_font_get_extents_for_direction: |
| * @font: #hb_font_t to work upon |
| * @direction: The direction of the text segment |
| * @extents: (out): The #hb_font_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_extents_t *extents) |
| { |
| font->get_extents_for_direction (direction, extents); |
| } |
| /** |
| * hb_font_get_glyph_advance_for_direction: |
| * @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) |
| { |
| font->get_glyph_advance_for_direction (glyph, direction, x, y); |
| } |
| /** |
| * hb_font_get_glyph_advances_for_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, |
| const hb_codepoint_t *first_glyph, |
| 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: #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) |
| { |
| return font->get_glyph_origin_for_direction (glyph, direction, x, y); |
| } |
| |
| /** |
| * hb_font_add_glyph_origin_for_direction: |
| * @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) |
| { |
| return font->add_glyph_origin_for_direction (glyph, direction, x, y); |
| } |
| |
| /** |
| * hb_font_subtract_glyph_origin_for_direction: |
| * @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) |
| { |
| return font->subtract_glyph_origin_for_direction (glyph, direction, x, y); |
| } |
| |
| /** |
| * hb_font_get_glyph_kerning_for_direction: |
| * @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) |
| { |
| return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y); |
| } |
| |
| /** |
| * hb_font_get_glyph_extents_for_origin: |
| * @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: `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_glyph_extents_t *extents) |
| { |
| return font->get_glyph_extents_for_origin (glyph, direction, extents); |
| } |
| |
| /** |
| * hb_font_get_glyph_contour_point_for_origin: |
| * @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: `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) |
| { |
| return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y); |
| } |
| |
| /** |
| * hb_font_glyph_to_string: |
| * @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. |
| * |
| * According to the OpenType specification, glyph names are limited to 63 |
| * characters and can only contain (a subset of) ASCII. |
| * |
| * Since: 0.9.2 |
| **/ |
| void |
| 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); |
| } |
| |
| /** |
| * hb_font_glyph_from_string: |
| * @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: `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, |
| hb_codepoint_t *glyph) |
| { |
| return font->glyph_from_string (s, len, glyph); |
| } |
| |
| |
| /* |
| * hb_font_t |
| */ |
| |
| DEFINE_NULL_INSTANCE (hb_font_t) = |
| { |
| HB_OBJECT_HEADER_STATIC, |
| |
| 0, /* serial */ |
| 0, /* serial_coords */ |
| |
| nullptr, /* parent */ |
| const_cast<hb_face_t *> (&_hb_Null_hb_face_t), |
| |
| 1000, /* x_scale */ |
| 1000, /* y_scale */ |
| 0., /* slant */ |
| 0., /* slant_xy; */ |
| 1.f, /* x_multf */ |
| 1.f, /* y_multf */ |
| 1<<16, /* x_mult */ |
| 1<<16, /* y_mult */ |
| |
| 0, /* x_ppem */ |
| 0, /* y_ppem */ |
| 0, /* ptem */ |
| |
| HB_FONT_NO_VAR_NAMED_INSTANCE, /* instance_index */ |
| 0, /* num_coords */ |
| nullptr, /* coords */ |
| nullptr, /* design_coords */ |
| |
| const_cast<hb_font_funcs_t *> (&_hb_Null_hb_font_funcs_t), |
| |
| /* Zero for the rest is fine. */ |
| }; |
| |
| |
| static hb_font_t * |
| _hb_font_create (hb_face_t *face) |
| { |
| hb_font_t *font; |
| |
| if (unlikely (!face)) |
| face = hb_face_get_empty (); |
| |
| if (!(font = hb_object_create<hb_font_t> ())) |
| return hb_font_get_empty (); |
| |
| hb_face_make_immutable (face); |
| font->parent = hb_font_get_empty (); |
| font->face = hb_face_reference (face); |
| font->klass = hb_font_funcs_get_empty (); |
| font->data.init0 (font); |
| font->x_scale = font->y_scale = face->get_upem (); |
| font->x_multf = font->y_multf = 1.f; |
| font->x_mult = font->y_mult = 1 << 16; |
| font->instance_index = HB_FONT_NO_VAR_NAMED_INSTANCE; |
| |
| return font; |
| } |
| |
| /** |
| * hb_font_create: |
| * @face: a face. |
| * |
| * Constructs a new font object from the specified face. |
| * |
| * <note>Note: If @face's index value (as passed to hb_face_create() |
| * has non-zero top 16-bits, those bits minus one are passed to |
| * hb_font_set_var_named_instance(), effectively loading a named-instance |
| * of a variable font, instead of the default-instance. This allows |
| * specifying which named-instance to load by default when creating the |
| * face.</note> |
| * |
| * Return value: (transfer full): The new font object |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_t * |
| hb_font_create (hb_face_t *face) |
| { |
| hb_font_t *font = _hb_font_create (face); |
| |
| #ifndef HB_NO_OT_FONT |
| /* Install our in-house, very lightweight, funcs. */ |
| hb_ot_font_set_funcs (font); |
| #endif |
| |
| #ifndef HB_NO_VAR |
| if (face && face->index >> 16) |
| hb_font_set_var_named_instance (font, (face->index >> 16) - 1); |
| #endif |
| |
| return font; |
| } |
| |
| static void |
| _hb_font_adopt_var_coords (hb_font_t *font, |
| int *coords, /* 2.14 normalized */ |
| float *design_coords, |
| unsigned int coords_length) |
| { |
| hb_free (font->coords); |
| hb_free (font->design_coords); |
| |
| font->coords = coords; |
| font->design_coords = design_coords; |
| font->num_coords = coords_length; |
| |
| font->mults_changed (); // Easiest to call this to drop cached data |
| } |
| |
| /** |
| * hb_font_create_sub_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): The new sub-font font object |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_t * |
| hb_font_create_sub_font (hb_font_t *parent) |
| { |
| if (unlikely (!parent)) |
| parent = hb_font_get_empty (); |
| |
| hb_font_t *font = _hb_font_create (parent->face); |
| |
| if (unlikely (hb_object_is_immutable (font))) |
| return font; |
| |
| font->parent = hb_font_reference (parent); |
| |
| font->x_scale = parent->x_scale; |
| font->y_scale = parent->y_scale; |
| font->slant = parent->slant; |
| font->x_ppem = parent->x_ppem; |
| font->y_ppem = parent->y_ppem; |
| font->ptem = parent->ptem; |
| |
| unsigned int num_coords = parent->num_coords; |
| if (num_coords) |
| { |
| int *coords = (int *) hb_calloc (num_coords, sizeof (parent->coords[0])); |
| float *design_coords = (float *) hb_calloc (num_coords, sizeof (parent->design_coords[0])); |
| if (likely (coords && design_coords)) |
| { |
| hb_memcpy (coords, parent->coords, num_coords * sizeof (parent->coords[0])); |
| hb_memcpy (design_coords, parent->design_coords, num_coords * sizeof (parent->design_coords[0])); |
| _hb_font_adopt_var_coords (font, coords, design_coords, num_coords); |
| } |
| else |
| { |
| hb_free (coords); |
| hb_free (design_coords); |
| } |
| } |
| |
| font->mults_changed (); |
| |
| return font; |
| } |
| |
| /** |
| * hb_font_get_empty: |
| * |
| * Fetches the empty font object. |
| * |
| * Return value: (transfer full): The empty font object |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_t * |
| hb_font_get_empty () |
| { |
| return const_cast<hb_font_t *> (&Null (hb_font_t)); |
| } |
| |
| /** |
| * hb_font_reference: (skip) |
| * @font: #hb_font_t to work upon |
| * |
| * Increases the reference count on the given font object. |
| * |
| * Return value: (transfer full): The @font object |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_t * |
| hb_font_reference (hb_font_t *font) |
| { |
| return hb_object_reference (font); |
| } |
| |
| /** |
| * hb_font_destroy: (skip) |
| * @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 |
| **/ |
| void |
| hb_font_destroy (hb_font_t *font) |
| { |
| if (!hb_object_destroy (font)) return; |
| |
| font->data.fini (); |
| |
| if (font->destroy) |
| font->destroy (font->user_data); |
| |
| hb_font_destroy (font->parent); |
| hb_face_destroy (font->face); |
| hb_font_funcs_destroy (font->klass); |
| |
| hb_free (font->coords); |
| hb_free (font->design_coords); |
| |
| hb_free (font); |
| } |
| |
| /** |
| * hb_font_set_user_data: (skip) |
| * @font: #hb_font_t to work upon |
| * @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 font object. |
| * |
| * Return value: `true` if success, `false` otherwise |
| * |
| * Since: 0.9.2 |
| **/ |
| 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 /* May be NULL. */, |
| hb_bool_t replace) |
| { |
| if (!hb_object_is_immutable (font)) |
| font->serial++; |
| |
| return hb_object_set_user_data (font, key, data, destroy, replace); |
| } |
| |
| /** |
| * hb_font_get_user_data: (skip) |
| * @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): Pointer to the user data |
| * |
| * Since: 0.9.2 |
| **/ |
| void * |
| hb_font_get_user_data (const hb_font_t *font, |
| hb_user_data_key_t *key) |
| { |
| return hb_object_get_user_data (font, key); |
| } |
| |
| /** |
| * hb_font_make_immutable: |
| * @font: #hb_font_t to work upon |
| * |
| * Makes @font immutable. |
| * |
| * Since: 0.9.2 |
| **/ |
| void |
| hb_font_make_immutable (hb_font_t *font) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->parent) |
| hb_font_make_immutable (font->parent); |
| |
| hb_object_make_immutable (font); |
| } |
| |
| /** |
| * hb_font_is_immutable: |
| * @font: #hb_font_t to work upon |
| * |
| * Tests whether a font object is immutable. |
| * |
| * Return value: `true` if @font is immutable, `false` otherwise |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_bool_t |
| hb_font_is_immutable (hb_font_t *font) |
| { |
| return hb_object_is_immutable (font); |
| } |
| |
| /** |
| * hb_font_get_serial: |
| * @font: #hb_font_t to work upon |
| * |
| * Returns the internal serial number of the font. The serial |
| * number is increased every time a setting on the font is |
| * changed, using a setter function. |
| * |
| * Return value: serial number |
| * |
| * Since: 4.4.0 |
| **/ |
| unsigned int |
| hb_font_get_serial (hb_font_t *font) |
| { |
| return font->serial; |
| } |
| |
| /** |
| * hb_font_changed: |
| * @font: #hb_font_t to work upon |
| * |
| * Notifies the @font that underlying font data has changed. |
| * This has the effect of increasing the serial as returned |
| * by hb_font_get_serial(), which invalidates internal caches. |
| * |
| * Since: 4.4.0 |
| **/ |
| void |
| hb_font_changed (hb_font_t *font) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| font->serial++; |
| |
| font->mults_changed (); |
| } |
| |
| /** |
| * hb_font_set_parent: |
| * @font: #hb_font_t to work upon |
| * @parent: The parent font object to assign |
| * |
| * Sets the parent font of @font. |
| * |
| * Since: 1.0.5 |
| **/ |
| void |
| hb_font_set_parent (hb_font_t *font, |
| hb_font_t *parent) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (parent == font->parent) |
| return; |
| |
| font->serial++; |
| |
| if (!parent) |
| parent = hb_font_get_empty (); |
| |
| hb_font_t *old = font->parent; |
| |
| font->parent = hb_font_reference (parent); |
| |
| hb_font_destroy (old); |
| } |
| |
| /** |
| * hb_font_get_parent: |
| * @font: #hb_font_t to work upon |
| * |
| * Fetches the parent font of @font. |
| * |
| * Return value: (transfer none): The parent font object |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_font_t * |
| hb_font_get_parent (hb_font_t *font) |
| { |
| return font->parent; |
| } |
| |
| /** |
| * hb_font_set_face: |
| * @font: #hb_font_t to work upon |
| * @face: The #hb_face_t to assign |
| * |
| * Sets @face as the font-face value of @font. |
| * |
| * Since: 1.4.3 |
| **/ |
| void |
| hb_font_set_face (hb_font_t *font, |
| hb_face_t *face) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (face == font->face) |
| return; |
| |
| font->serial++; |
| |
| if (unlikely (!face)) |
| face = hb_face_get_empty (); |
| |
| hb_face_t *old = font->face; |
| |
| hb_face_make_immutable (face); |
| font->face = hb_face_reference (face); |
| font->mults_changed (); |
| |
| hb_face_destroy (old); |
| } |
| |
| /** |
| * hb_font_get_face: |
| * @font: #hb_font_t to work upon |
| * |
| * Fetches the face associated with the specified font object. |
| * |
| * Return value: (transfer none): The #hb_face_t value |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_face_t * |
| hb_font_get_face (hb_font_t *font) |
| { |
| return font->face; |
| } |
| |
| |
| /** |
| * hb_font_set_funcs: |
| * @font: #hb_font_t to work upon |
| * @klass: (closure font_data) (destroy destroy) (scope notified): The font-functions structure. |
| * @font_data: Data to attach to @font |
| * @destroy: (nullable): 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 |
| **/ |
| void |
| hb_font_set_funcs (hb_font_t *font, |
| hb_font_funcs_t *klass, |
| void *font_data, |
| hb_destroy_func_t destroy /* May be NULL. */) |
| { |
| if (hb_object_is_immutable (font)) |
| { |
| if (destroy) |
| destroy (font_data); |
| return; |
| } |
| |
| font->serial++; |
| |
| if (font->destroy) |
| font->destroy (font->user_data); |
| |
| if (!klass) |
| klass = hb_font_funcs_get_empty (); |
| |
| hb_font_funcs_reference (klass); |
| hb_font_funcs_destroy (font->klass); |
| font->klass = klass; |
| font->user_data = font_data; |
| font->destroy = destroy; |
| } |
| |
| /** |
| * hb_font_set_funcs_data: |
| * @font: #hb_font_t to work upon |
| * @font_data: (destroy destroy) (scope notified): Data to attach to @font |
| * @destroy: (nullable): 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 /* May be NULL. */) |
| { |
| /* Destroy user_data? */ |
| if (hb_object_is_immutable (font)) |
| { |
| if (destroy) |
| destroy (font_data); |
| return; |
| } |
| |
| font->serial++; |
| |
| if (font->destroy) |
| font->destroy (font->user_data); |
| |
| font->user_data = font_data; |
| font->destroy = destroy; |
| } |
| |
| |
| /** |
| * hb_font_set_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. |
| * |
| * The font scale is a number related to, but not the same as, |
| * font size. Typically the client establishes a scale factor |
| * to be used between the two. For example, 64, or 256, which |
| * would be the fractional-precision part of the font scale. |
| * This is necessary because #hb_position_t values are integer |
| * types and you need to leave room for fractional values |
| * in there. |
| * |
| * For example, to set the font size to 20, with 64 |
| * levels of fractional precision you would call |
| * `hb_font_set_scale(font, 20 * 64, 20 * 64)`. |
| * |
| * In the example above, even what font size 20 means is up to |
| * you. It might be 20 pixels, or 20 points, or 20 millimeters. |
| * HarfBuzz does not care about that. You can set the point |
| * size of the font using hb_font_set_ptem(), and the pixel |
| * size using hb_font_set_ppem(). |
| * |
| * The choice of scale is yours but needs to be consistent between |
| * what you set here, and what you expect out of #hb_position_t |
| * as well has draw / paint API output values. |
| * |
| * Fonts default to a scale equal to the UPEM value of their face. |
| * A font with this setting is sometimes called an "unscaled" font. |
| * |
| * Since: 0.9.2 |
| **/ |
| void |
| hb_font_set_scale (hb_font_t *font, |
| int x_scale, |
| int y_scale) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->x_scale == x_scale && font->y_scale == y_scale) |
| return; |
| |
| font->serial++; |
| |
| font->x_scale = x_scale; |
| font->y_scale = y_scale; |
| font->mults_changed (); |
| } |
| |
| /** |
| * hb_font_get_scale: |
| * @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) |
| { |
| if (x_scale) *x_scale = font->x_scale; |
| if (y_scale) *y_scale = font->y_scale; |
| } |
| |
| /** |
| * hb_font_set_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. |
| * |
| * These values are used for pixel-size-specific adjustment to |
| * shaping and draw results, though for the most part they are |
| * unused and can be left unset. |
| * |
| * Since: 0.9.2 |
| **/ |
| void |
| hb_font_set_ppem (hb_font_t *font, |
| unsigned int x_ppem, |
| unsigned int y_ppem) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->x_ppem == x_ppem && font->y_ppem == y_ppem) |
| return; |
| |
| font->serial++; |
| |
| font->x_ppem = x_ppem; |
| font->y_ppem = y_ppem; |
| } |
| |
| /** |
| * hb_font_get_ppem: |
| * @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, |
| unsigned int *x_ppem, |
| unsigned int *y_ppem) |
| { |
| if (x_ppem) *x_ppem = font->x_ppem; |
| if (y_ppem) *y_ppem = font->y_ppem; |
| } |
| |
| /** |
| * hb_font_set_ptem: |
| * @font: #hb_font_t to work upon |
| * @ptem: font size in points. |
| * |
| * Sets the "point size" of a font. Set to zero to unset. |
| * Used in CoreText to implement optical sizing. |
| * |
| * <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) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->ptem == ptem) |
| return; |
| |
| font->serial++; |
| |
| font->ptem = ptem; |
| } |
| |
| /** |
| * hb_font_get_ptem: |
| * @font: #hb_font_t to work upon |
| * |
| * Fetches the "point size" of a font. Used in CoreText to |
| * implement optical sizing. |
| * |
| * Return value: Point size. A value of zero means "not set." |
| * |
| * Since: 1.6.0 |
| **/ |
| float |
| hb_font_get_ptem (hb_font_t *font) |
| { |
| return font->ptem; |
| } |
| |
| /** |
| * hb_font_set_synthetic_slant: |
| * @font: #hb_font_t to work upon |
| * @slant: synthetic slant value. |
| * |
| * Sets the "synthetic slant" of a font. By default is zero. |
| * Synthetic slant is the graphical skew applied to the font |
| * at rendering time. |
| * |
| * HarfBuzz needs to know this value to adjust shaping results, |
| * metrics, and style values to match the slanted rendering. |
| * |
| * <note>Note: The glyph shape fetched via the hb_font_draw_glyph() |
| * function is slanted to reflect this value as well.</note> |
| * |
| * <note>Note: The slant value is a ratio. For example, a |
| * 20% slant would be represented as a 0.2 value.</note> |
| * |
| * Since: 3.3.0 |
| **/ |
| HB_EXTERN void |
| hb_font_set_synthetic_slant (hb_font_t *font, float slant) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->slant == slant) |
| return; |
| |
| font->serial++; |
| |
| font->slant = slant; |
| font->mults_changed (); |
| } |
| |
| /** |
| * hb_font_get_synthetic_slant: |
| * @font: #hb_font_t to work upon |
| * |
| * Fetches the "synthetic slant" of a font. |
| * |
| * Return value: Synthetic slant. By default is zero. |
| * |
| * Since: 3.3.0 |
| **/ |
| HB_EXTERN float |
| hb_font_get_synthetic_slant (hb_font_t *font) |
| { |
| return font->slant; |
| } |
| |
| #ifndef HB_NO_VAR |
| /* |
| * Variations |
| */ |
| |
| /** |
| * 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. |
| * |
| * Note that this overrides all existing variations set on @font. |
| * Axes not included in @variations will be effectively set to their |
| * default values. |
| * |
| * Since: 1.4.2 |
| */ |
| void |
| hb_font_set_variations (hb_font_t *font, |
| const hb_variation_t *variations, |
| unsigned int variations_length) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| font->serial_coords = ++font->serial; |
| |
| if (!variations_length && font->instance_index == HB_FONT_NO_VAR_NAMED_INSTANCE) |
| { |
| hb_font_set_var_coords_normalized (font, nullptr, 0); |
| return; |
| } |
| |
| const OT::fvar &fvar = *font->face->table.fvar; |
| auto axes = fvar.get_axes (); |
| const unsigned coords_length = axes.length; |
| |
| int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr; |
| float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr; |
| |
| if (unlikely (coords_length && !(normalized && design_coords))) |
| { |
| hb_free (normalized); |
| hb_free (design_coords); |
| return; |
| } |
| |
| /* Initialize design coords. */ |
| for (unsigned int i = 0; i < coords_length; i++) |
| design_coords[i] = axes[i].get_default (); |
| if (font->instance_index != HB_FONT_NO_VAR_NAMED_INSTANCE) |
| { |
| unsigned count = coords_length; |
| /* This may fail if index is out-of-range; |
| * That's why we initialize design_coords from fvar above |
| * unconditionally. */ |
| hb_ot_var_named_instance_get_design_coords (font->face, font->instance_index, |
| &count, design_coords); |
| } |
| |
| for (unsigned int i = 0; i < variations_length; i++) |
| { |
| const auto tag = variations[i].tag; |
| const auto v = variations[i].value; |
| for (unsigned axis_index = 0; axis_index < coords_length; axis_index++) |
| if (axes[axis_index].axisTag == tag) |
| design_coords[axis_index] = v; |
| } |
| font->face->table.avar->map_coords (normalized, coords_length); |
| |
| hb_ot_var_normalize_coords (font->face, coords_length, design_coords, normalized); |
| _hb_font_adopt_var_coords (font, normalized, design_coords, coords_length); |
| } |
| |
| /** |
| * 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. |
| * |
| * Note that this overrides all existing variations set on @font. |
| * Axes not included in @coords will be effectively set to their |
| * default values. |
| * |
| * Since: 1.4.2 |
| */ |
| void |
| hb_font_set_var_coords_design (hb_font_t *font, |
| const float *coords, |
| unsigned int coords_length) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| font->serial_coords = ++font->serial; |
| |
| int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr; |
| float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr; |
| |
| if (unlikely (coords_length && !(normalized && design_coords))) |
| { |
| hb_free (normalized); |
| hb_free (design_coords); |
| return; |
| } |
| |
| if (coords_length) |
| hb_memcpy (design_coords, coords, coords_length * sizeof (font->design_coords[0])); |
| |
| hb_ot_var_normalize_coords (font->face, coords_length, coords, normalized); |
| _hb_font_adopt_var_coords (font, normalized, design_coords, coords_length); |
| } |
| |
| /** |
| * hb_font_set_var_named_instance: |
| * @font: a font. |
| * @instance_index: named instance index. |
| * |
| * Sets design coords of a font from a named-instance index. |
| * |
| * Since: 2.6.0 |
| */ |
| void |
| hb_font_set_var_named_instance (hb_font_t *font, |
| unsigned int instance_index) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| if (font->instance_index == instance_index) |
| return; |
| |
| font->serial_coords = ++font->serial; |
| |
| font->instance_index = instance_index; |
| hb_font_set_variations (font, nullptr, 0); |
| } |
| |
| /** |
| * hb_font_get_var_named_instance: |
| * @font: a font. |
| * |
| * Returns the currently-set named-instance index of the font. |
| * |
| * Return value: Named-instance index or %HB_FONT_NO_VAR_NAMED_INSTANCE. |
| * |
| * Since: REPLACEME |
| **/ |
| unsigned int |
| hb_font_get_var_named_instance (hb_font_t *font) |
| { |
| return font->instance_index; |
| } |
| |
| /** |
| * 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 that this overrides all existing variations set on @font. |
| * Axes not included in @coords will be effectively set to their |
| * default values. |
| * |
| * <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) |
| { |
| if (hb_object_is_immutable (font)) |
| return; |
| |
| font->serial_coords = ++font->serial; |
| |
| int *copy = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr; |
| int *unmapped = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr; |
| float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (design_coords[0])) : nullptr; |
| |
| if (unlikely (coords_length && !(copy && unmapped && design_coords))) |
| { |
| hb_free (copy); |
| hb_free (unmapped); |
| hb_free (design_coords); |
| return; |
| } |
| |
| if (coords_length) |
| { |
| hb_memcpy (copy, coords, coords_length * sizeof (coords[0])); |
| hb_memcpy (unmapped, coords, coords_length * sizeof (coords[0])); |
| } |
| |
| /* Best effort design coords simulation */ |
| font->face->table.avar->unmap_coords (unmapped, coords_length); |
| for (unsigned int i = 0; i < coords_length; ++i) |
| design_coords[i] = font->face->table.fvar->unnormalize_axis_value (i, unmapped[i]); |
| hb_free (unmapped); |
| |
| _hb_font_adopt_var_coords (font, copy, design_coords, coords_length); |
| } |
| |
| /** |
| * hb_font_get_var_coords_normalized: |
| * @font: #hb_font_t to work upon |
| * @length: (out): Number of coordinates retrieved |
| * |
| * Fetches the list of normalized variation coordinates currently |
| * set on a font. |
| * |
| * Note that this returned array may only contain values for some |
| * (or none) of the axes; omitted axes effectively have zero values. |
| * |
| * Return value is valid as long as variation coordinates of the font |
| * are not modified. |
| * |
| * Return value: coordinates array |
| * |
| * Since: 1.4.2 |
| */ |
| const int * |
| hb_font_get_var_coords_normalized (hb_font_t *font, |
| unsigned int *length) |
| { |
| if (length) |
| *length = font->num_coords; |
| |
| return font->coords; |
| } |
| |
| /** |
| * hb_font_get_var_coords_design: |
| * @font: #hb_font_t to work upon |
| * @length: (out): Number of coordinates retrieved |
| * |
| * Fetches the list of variation coordinates (in design-space units) currently |
| * set on a font. |
| * |
| * Note that this returned array may only contain values for some |
| * (or none) of the axes; omitted axes effectively have their default |
| * values. |
| * |
| * Return value is valid as long as variation coordinates of the font |
| * are not modified. |
| * |
| * Return value: coordinates array |
| * |
| * Since: 3.3.0 |
| */ |
| const float * |
| hb_font_get_var_coords_design (hb_font_t *font, |
| unsigned int *length) |
| { |
| if (length) |
| *length = font->num_coords; |
| |
| return font->design_coords; |
| } |
| #endif |
| |
| #ifndef HB_DISABLE_DEPRECATED |
| /* |
| * Deprecated get_glyph_func(): |
| */ |
| |
| struct hb_trampoline_closure_t |
| { |
| void *user_data; |
| hb_destroy_func_t destroy; |
| unsigned int ref_count; |
| }; |
| |
| template <typename FuncType> |
| struct hb_trampoline_t |
| { |
| hb_trampoline_closure_t closure; /* Must be first. */ |
| FuncType func; |
| }; |
| |
| template <typename FuncType> |
| static hb_trampoline_t<FuncType> * |
| trampoline_create (FuncType func, |
| void *user_data, |
| hb_destroy_func_t destroy) |
| { |
| typedef hb_trampoline_t<FuncType> trampoline_t; |
| |
| trampoline_t *trampoline = (trampoline_t *) hb_calloc (1, sizeof (trampoline_t)); |
| |
| if (unlikely (!trampoline)) |
| return nullptr; |
| |
| trampoline->closure.user_data = user_data; |
| trampoline->closure.destroy = destroy; |
| trampoline->closure.ref_count = 1; |
| trampoline->func = func; |
| |
| return trampoline; |
| } |
| |
| static void |
| trampoline_reference (hb_trampoline_closure_t *closure) |
| { |
| closure->ref_count++; |
| } |
| |
| static void |
| trampoline_destroy (void *user_data) |
| { |
| hb_trampoline_closure_t *closure = (hb_trampoline_closure_t *) user_data; |
| |
| if (--closure->ref_count) |
| return; |
| |
| if (closure->destroy) |
| closure->destroy (closure->user_data); |
| hb_free (closure); |
| } |
| |
| 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_codepoint_t *glyph, |
| 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_codepoint_t *glyph, |
| 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); |
| } |
| |
| /** |
| * hb_font_funcs_set_glyph_func: |
| * @ffuncs: The font-functions structure |
| * @func: (closure user_data) (destroy destroy) (scope notified): callback function |
| * @user_data: data to pass to @func |
| * @destroy: (nullable): 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. |
| * |
| * Since: 0.9.2 |
| * 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 /* May be NULL. */) |
| { |
| if (hb_object_is_immutable (ffuncs)) |
| { |
| if (destroy) |
| destroy (user_data); |
| return; |
| } |
| |
| hb_font_get_glyph_trampoline_t *trampoline; |
| |
| trampoline = trampoline_create (func, user_data, destroy); |
| if (unlikely (!trampoline)) |
| { |
| if (destroy) |
| destroy (user_data); |
| return; |
| } |
| |
| /* Since we pass it to two destroying functions. */ |
| trampoline_reference (&trampoline->closure); |
| |
| hb_font_funcs_set_nominal_glyph_func (ffuncs, |
| hb_font_get_nominal_glyph_trampoline, |
| trampoline, |
| trampoline_destroy); |
| |
| hb_font_funcs_set_variation_glyph_func (ffuncs, |
| hb_font_get_variation_glyph_trampoline, |
| trampoline, |
| trampoline_destroy); |
| } |
| #endif |
| |
| |
| void |
| hb_font_funcs_set_glyph_shape_func (hb_font_funcs_t *ffuncs, |
| hb_font_get_glyph_shape_func_t func, |
| void *user_data, |
| hb_destroy_func_t destroy /* May be NULL. */) |
| { |
| hb_font_funcs_set_draw_glyph_func (ffuncs, func, user_data, destroy); |
| } |