/* * Copyright © 2011,2014 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. * * Google Author(s): Behdad Esfahbod, Roozbeh Pournader */ #include "hb.hh" #include "hb-ot.h" #include "hb-font.hh" #include "hb-machinery.hh" #include "hb-ot-face.hh" #include "hb-ot-cmap-table.hh" #include "hb-ot-hmtx-table.hh" #include "hb-ot-kern-table.hh" #include "hb-ot-post-table.hh" #include "hb-ot-glyf-table.hh" #include "hb-ot-color-cbdt-table.hh" static hb_bool_t hb_ot_get_nominal_glyph (hb_font_t *font HB_UNUSED, void *font_data, hb_codepoint_t unicode, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; return ot_face->cmap.get_relaxed()->get_nominal_glyph (unicode, glyph); } static hb_bool_t hb_ot_get_variation_glyph (hb_font_t *font HB_UNUSED, void *font_data, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; return ot_face->cmap.get_relaxed ()->get_variation_glyph (unicode, variation_selector, glyph); } static void hb_ot_get_glyph_h_advances (hb_font_t* font, void* font_data, unsigned count, const hb_codepoint_t *first_glyph, unsigned glyph_stride, hb_position_t *first_advance, unsigned advance_stride, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; const OT::hmtx_accelerator_t &hmtx = *ot_face->hmtx.get (); for (unsigned int i = 0; i < count; i++) { *first_advance = font->em_scale_x (hmtx.get_advance (*first_glyph, font)); first_glyph = &StructAtOffset (first_glyph, glyph_stride); first_advance = &StructAtOffset (first_advance, advance_stride); } } static void hb_ot_get_glyph_v_advances (hb_font_t* font, void* font_data, unsigned count, const hb_codepoint_t *first_glyph, unsigned glyph_stride, hb_position_t *first_advance, unsigned advance_stride, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx.get (); for (unsigned int i = 0; i < count; i++) { *first_advance = font->em_scale_y (-(int) vmtx.get_advance (*first_glyph, font)); first_glyph = &StructAtOffset (first_glyph, glyph_stride); first_advance = &StructAtOffset (first_advance, advance_stride); } } static hb_bool_t hb_ot_get_glyph_extents (hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; bool ret = ot_face->glyf->get_extents (glyph, extents); if (!ret) ret = ot_face->CBDT->get_extents (glyph, extents); // TODO Hook up side-bearings variations. extents->x_bearing = font->em_scale_x (extents->x_bearing); extents->y_bearing = font->em_scale_y (extents->y_bearing); extents->width = font->em_scale_x (extents->width); extents->height = font->em_scale_y (extents->height); return ret; } static hb_bool_t hb_ot_get_glyph_name (hb_font_t *font HB_UNUSED, void *font_data, hb_codepoint_t glyph, char *name, unsigned int size, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; return ot_face->post->get_glyph_name (glyph, name, size); } static hb_bool_t hb_ot_get_glyph_from_name (hb_font_t *font HB_UNUSED, void *font_data, const char *name, int len, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; return ot_face->post->get_glyph_from_name (name, len, glyph); } static hb_bool_t hb_ot_get_font_h_extents (hb_font_t *font, void *font_data, hb_font_extents_t *metrics, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; const OT::hmtx_accelerator_t &hmtx = *ot_face->hmtx.get (); metrics->ascender = font->em_scale_y (hmtx.ascender); metrics->descender = font->em_scale_y (hmtx.descender); metrics->line_gap = font->em_scale_y (hmtx.line_gap); // TODO Hook up variations. return hmtx.has_font_extents; } static hb_bool_t hb_ot_get_font_v_extents (hb_font_t *font, void *font_data, hb_font_extents_t *metrics, void *user_data HB_UNUSED) { const hb_ot_face_data_t *ot_face = (const hb_ot_face_data_t *) font_data; const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx.get (); metrics->ascender = font->em_scale_x (vmtx.ascender); metrics->descender = font->em_scale_x (vmtx.descender); metrics->line_gap = font->em_scale_x (vmtx.line_gap); // TODO Hook up variations. return vmtx.has_font_extents; } #ifdef HB_USE_ATEXIT static void free_static_ot_funcs (void); #endif static struct hb_ot_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t { static inline hb_font_funcs_t *create (void) { hb_font_funcs_t *funcs = hb_font_funcs_create (); hb_font_funcs_set_font_h_extents_func (funcs, hb_ot_get_font_h_extents, nullptr, nullptr); hb_font_funcs_set_font_v_extents_func (funcs, hb_ot_get_font_v_extents, nullptr, nullptr); hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, nullptr, nullptr); hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, nullptr, nullptr); hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ot_get_glyph_h_advances, nullptr, nullptr); hb_font_funcs_set_glyph_v_advances_func (funcs, hb_ot_get_glyph_v_advances, nullptr, nullptr); //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, nullptr, nullptr); //hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ot_get_glyph_v_origin, nullptr, nullptr); hb_font_funcs_set_glyph_extents_func (funcs, hb_ot_get_glyph_extents, nullptr, nullptr); //hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ot_get_glyph_contour_point, nullptr, nullptr); hb_font_funcs_set_glyph_name_func (funcs, hb_ot_get_glyph_name, nullptr, nullptr); hb_font_funcs_set_glyph_from_name_func (funcs, hb_ot_get_glyph_from_name, nullptr, nullptr); hb_font_funcs_make_immutable (funcs); #ifdef HB_USE_ATEXIT atexit (free_static_ot_funcs); #endif return funcs; } } static_ot_funcs; #ifdef HB_USE_ATEXIT static void free_static_ot_funcs (void) { static_ot_funcs.free_instance (); } #endif static hb_font_funcs_t * _hb_ot_get_font_funcs (void) { return static_ot_funcs.get_unconst (); } /** * hb_ot_font_set_funcs: * * Since: 0.9.28 **/ void hb_ot_font_set_funcs (hb_font_t *font) { if (unlikely (!hb_ot_shaper_face_data_ensure (font->face))) return; hb_ot_face_data_t *ot_face = hb_ot_face_data (font->face); /* Load them lazy. We access it with get_relaxed() for performance. */ ot_face->cmap.get (); hb_font_set_funcs (font, _hb_ot_get_font_funcs (), ot_face, nullptr); }