| /* |
| * 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" |
| |
| #ifndef HB_NO_OT_FONT |
| |
| #include "hb-ot.h" |
| |
| #include "hb-cache.hh" |
| #include "hb-font.hh" |
| #include "hb-machinery.hh" |
| #include "hb-ot-face.hh" |
| |
| #include "hb-ot-cmap-table.hh" |
| #include "hb-ot-glyf-table.hh" |
| #include "hb-ot-var-gvar-table.hh" |
| #include "hb-ot-cff2-table.hh" |
| #include "hb-ot-cff1-table.hh" |
| #include "hb-ot-hmtx-table.hh" |
| #include "hb-ot-post-table.hh" |
| #include "hb-ot-stat-table.hh" |
| #include "hb-ot-var-varc-table.hh" |
| #include "hb-ot-vorg-table.hh" |
| #include "OT/Color/CBDT/CBDT.hh" |
| #include "OT/Color/COLR/COLR.hh" |
| #include "OT/Color/sbix/sbix.hh" |
| #include "OT/Color/svg/svg.hh" |
| |
| |
| /** |
| * SECTION:hb-ot-font |
| * @title: hb-ot-font |
| * @short_description: OpenType font implementation |
| * @include: hb-ot.h |
| * |
| * Functions for using OpenType fonts with hb_shape(). Note that fonts returned |
| * by hb_font_create() default to using these functions, so most clients would |
| * never need to call these functions directly. |
| **/ |
| |
| using hb_ot_font_advance_cache_t = hb_cache_t<24, 16>; |
| static_assert (sizeof (hb_ot_font_advance_cache_t) == 1024, ""); |
| |
| using hb_ot_font_origin_cache_t = hb_cache_t<20, 20>; |
| static_assert (sizeof (hb_ot_font_origin_cache_t) == 1024, ""); |
| |
| struct hb_ot_font_t |
| { |
| const hb_ot_face_t *ot_face; |
| |
| mutable hb_atomic_t<int> cached_serial; |
| mutable hb_atomic_t<int> cached_coords_serial; |
| |
| struct direction_cache_t |
| { |
| mutable hb_atomic_t<hb_ot_font_advance_cache_t *> advance_cache; |
| mutable hb_atomic_t<OT::hb_scalar_cache_t *> varStore_cache; |
| |
| ~direction_cache_t () |
| { |
| clear (); |
| } |
| |
| hb_ot_font_advance_cache_t *acquire_advance_cache () const |
| { |
| retry: |
| auto *cache = advance_cache.get_acquire (); |
| if (!cache) |
| { |
| cache = (hb_ot_font_advance_cache_t *) hb_malloc (sizeof (hb_ot_font_advance_cache_t)); |
| if (!cache) |
| return nullptr; |
| new (cache) hb_ot_font_advance_cache_t; |
| return cache; |
| } |
| if (advance_cache.cmpexch (cache, nullptr)) |
| return cache; |
| else |
| goto retry; |
| } |
| void release_advance_cache (hb_ot_font_advance_cache_t *cache) const |
| { |
| if (!cache) |
| return; |
| if (!advance_cache.cmpexch (nullptr, cache)) |
| hb_free (cache); |
| } |
| void clear_advance_cache () const |
| { |
| retry: |
| auto *cache = advance_cache.get_acquire (); |
| if (!cache) |
| return; |
| if (advance_cache.cmpexch (cache, nullptr)) |
| hb_free (cache); |
| else |
| goto retry; |
| } |
| |
| OT::hb_scalar_cache_t *acquire_varStore_cache (const OT::ItemVariationStore &varStore) const |
| { |
| retry: |
| auto *cache = varStore_cache.get_acquire (); |
| if (!cache) |
| return varStore.create_cache (); |
| if (varStore_cache.cmpexch (cache, nullptr)) |
| return cache; |
| else |
| goto retry; |
| } |
| void release_varStore_cache (OT::hb_scalar_cache_t *cache) const |
| { |
| if (!cache) |
| return; |
| if (!varStore_cache.cmpexch (nullptr, cache)) |
| OT::ItemVariationStore::destroy_cache (cache); |
| } |
| void clear_varStore_cache () const |
| { |
| retry: |
| auto *cache = varStore_cache.get_acquire (); |
| if (!cache) |
| return; |
| if (varStore_cache.cmpexch (cache, nullptr)) |
| OT::ItemVariationStore::destroy_cache (cache); |
| else |
| goto retry; |
| } |
| |
| void clear () const |
| { |
| clear_advance_cache (); |
| clear_varStore_cache (); |
| } |
| |
| } h, v; |
| |
| struct origin_cache_t |
| { |
| mutable hb_atomic_t<hb_ot_font_origin_cache_t *> origin_cache; |
| mutable hb_atomic_t<OT::hb_scalar_cache_t *> varStore_cache; |
| |
| ~origin_cache_t () |
| { |
| clear (); |
| } |
| |
| hb_ot_font_origin_cache_t *acquire_origin_cache () const |
| { |
| retry: |
| auto *cache = origin_cache.get_acquire (); |
| if (!cache) |
| { |
| cache = (hb_ot_font_origin_cache_t *) hb_malloc (sizeof (hb_ot_font_origin_cache_t)); |
| if (!cache) |
| return nullptr; |
| new (cache) hb_ot_font_origin_cache_t; |
| return cache; |
| } |
| if (origin_cache.cmpexch (cache, nullptr)) |
| return cache; |
| else |
| goto retry; |
| } |
| void release_origin_cache (hb_ot_font_origin_cache_t *cache) const |
| { |
| if (!cache) |
| return; |
| if (!origin_cache.cmpexch (nullptr, cache)) |
| hb_free (cache); |
| } |
| void clear_origin_cache () const |
| { |
| retry: |
| auto *cache = origin_cache.get_acquire (); |
| if (!cache) |
| return; |
| if (origin_cache.cmpexch (cache, nullptr)) |
| hb_free (cache); |
| else |
| goto retry; |
| } |
| |
| OT::hb_scalar_cache_t *acquire_varStore_cache (const OT::ItemVariationStore &varStore) const |
| { |
| retry: |
| auto *cache = varStore_cache.get_acquire (); |
| if (!cache) |
| return varStore.create_cache (); |
| if (varStore_cache.cmpexch (cache, nullptr)) |
| return cache; |
| else |
| goto retry; |
| } |
| void release_varStore_cache (OT::hb_scalar_cache_t *cache) const |
| { |
| if (!cache) |
| return; |
| if (!varStore_cache.cmpexch (nullptr, cache)) |
| OT::ItemVariationStore::destroy_cache (cache); |
| } |
| void clear_varStore_cache () const |
| { |
| retry: |
| auto *cache = varStore_cache.get_acquire (); |
| if (!cache) |
| return; |
| if (varStore_cache.cmpexch (cache, nullptr)) |
| OT::ItemVariationStore::destroy_cache (cache); |
| else |
| goto retry; |
| } |
| |
| void clear () const |
| { |
| clear_origin_cache (); |
| clear_varStore_cache (); |
| } |
| } v_origin; |
| |
| struct draw_cache_t |
| { |
| mutable hb_atomic_t<OT::hb_scalar_cache_t *> gvar_cache; |
| |
| ~draw_cache_t () |
| { |
| clear (); |
| } |
| |
| OT::hb_scalar_cache_t *acquire_gvar_cache (const OT::gvar_accelerator_t &gvar) const |
| { |
| retry: |
| auto *cache = gvar_cache.get_acquire (); |
| if (!cache) |
| return gvar.create_cache (); |
| if (gvar_cache.cmpexch (cache, nullptr)) |
| return cache; |
| else |
| goto retry; |
| } |
| void release_gvar_cache (OT::hb_scalar_cache_t *cache) const |
| { |
| if (!cache) |
| return; |
| if (!gvar_cache.cmpexch (nullptr, cache)) |
| OT::gvar_accelerator_t::destroy_cache (cache); |
| } |
| void clear_gvar_cache () const |
| { |
| retry: |
| auto *cache = gvar_cache.get_acquire (); |
| if (!cache) |
| return; |
| if (gvar_cache.cmpexch (cache, nullptr)) |
| OT::gvar_accelerator_t::destroy_cache (cache); |
| else |
| goto retry; |
| } |
| |
| void clear () const |
| { |
| clear_gvar_cache (); |
| } |
| } draw; |
| |
| void check_serial (hb_font_t *font) const |
| { |
| int font_serial = font->serial_coords.get_acquire (); |
| if (cached_serial.get_acquire () != font_serial) |
| { |
| /* These caches are dependent on scale and synthetic settings. |
| * Any change to the font invalidates them. */ |
| v_origin.clear (); |
| |
| cached_serial.set_release (font_serial); |
| } |
| |
| int font_serial_coords = font->serial_coords.get_acquire (); |
| if (cached_coords_serial.get_acquire () != font_serial_coords) |
| { |
| /* These caches are independent of scale or synthetic settings. |
| * Just variation changes will invalidate them. */ |
| h.clear (); |
| v.clear (); |
| draw.clear (); |
| |
| cached_coords_serial.set_release (font_serial_coords); |
| } |
| } |
| }; |
| |
| static hb_ot_font_t * |
| _hb_ot_font_create (hb_font_t *font) |
| { |
| hb_ot_font_t *ot_font = (hb_ot_font_t *) hb_calloc (1, sizeof (hb_ot_font_t)); |
| if (unlikely (!ot_font)) |
| return nullptr; |
| |
| ot_font->ot_face = &font->face->table; |
| |
| return ot_font; |
| } |
| |
| static void |
| _hb_ot_font_destroy (void *font_data) |
| { |
| hb_ot_font_t *ot_font = (hb_ot_font_t *) font_data; |
| |
| ot_font->~hb_ot_font_t (); |
| |
| hb_free (ot_font); |
| } |
| |
| 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_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| return ot_face->cmap->get_nominal_glyph (unicode, glyph); |
| } |
| |
| static unsigned int |
| hb_ot_get_nominal_glyphs (hb_font_t *font HB_UNUSED, |
| void *font_data, |
| 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) |
| { |
| const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| return ot_face->cmap->get_nominal_glyphs (count, |
| first_unicode, unicode_stride, |
| first_glyph, glyph_stride); |
| } |
| |
| 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_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| return ot_face->cmap->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) |
| { |
| // Duplicated in v_advances. Ugly. Keep in sync'ish. |
| |
| const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| const OT::hmtx_accelerator_t &hmtx = *ot_face->hmtx; |
| |
| if (unlikely (!hmtx.has_data ())) |
| { |
| hb_position_t advance = font->face->get_upem () / 2; |
| advance = font->em_scale_x (advance); |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = advance; |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| #ifndef HB_NO_VAR |
| if (!font->has_nonzero_coords) |
| { |
| fallback: |
| #else |
| { |
| #endif |
| // Just plain htmx data. No need to cache. |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->em_scale_x (hmtx.get_advance_without_var_unscaled (*first_glyph)); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| #ifndef HB_NO_VAR |
| /* has_nonzero_coords. */ |
| |
| ot_font->check_serial (font); |
| hb_ot_font_advance_cache_t *advance_cache = ot_font->h.acquire_advance_cache (); |
| if (!advance_cache) |
| { |
| // malloc failure. Just use the fallback non-variable path. |
| goto fallback; |
| } |
| |
| /* If HVAR is present, use it.*/ |
| const OT::HVAR &HVAR = *hmtx.var_table; |
| if (HVAR.has_data ()) |
| { |
| const OT::ItemVariationStore &varStore = &HVAR + HVAR.varStore; |
| OT::hb_scalar_cache_t *varStore_cache = ot_font->h.acquire_varStore_cache (varStore); |
| |
| for (unsigned int i = 0; i < count; i++) |
| { |
| hb_position_t v; |
| unsigned cv; |
| if (advance_cache->get (*first_glyph, &cv)) |
| v = cv; |
| else |
| { |
| v = hmtx.get_advance_with_var_unscaled (*first_glyph, font, varStore_cache); |
| advance_cache->set (*first_glyph, v); |
| } |
| *first_advance = font->em_scale_x (v); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| |
| ot_font->h.release_varStore_cache (varStore_cache); |
| ot_font->h.release_advance_cache (advance_cache); |
| return; |
| } |
| |
| const auto &gvar = *ot_face->gvar; |
| if (gvar.has_data ()) |
| { |
| const auto &glyf = *ot_face->glyf; |
| auto *scratch = glyf.acquire_scratch (); |
| if (unlikely (!scratch)) |
| { |
| ot_font->h.release_advance_cache (advance_cache); |
| goto fallback; |
| } |
| OT::hb_scalar_cache_t *gvar_cache = ot_font->draw.acquire_gvar_cache (gvar); |
| |
| for (unsigned int i = 0; i < count; i++) |
| { |
| hb_position_t v; |
| unsigned cv; |
| if (advance_cache->get (*first_glyph, &cv)) |
| v = cv; |
| else |
| { |
| v = glyf.get_advance_with_var_unscaled (*first_glyph, font, false, *scratch, gvar_cache); |
| advance_cache->set (*first_glyph, v); |
| } |
| *first_advance = font->em_scale_x (v); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| |
| ot_font->draw.release_gvar_cache (gvar_cache); |
| glyf.release_scratch (scratch); |
| ot_font->h.release_advance_cache (advance_cache); |
| return; |
| } |
| |
| ot_font->h.release_advance_cache (advance_cache); |
| // No HVAR or GVAR. Just use the fallback non-variable path. |
| goto fallback; |
| #endif |
| } |
| |
| #ifndef HB_NO_VERTICAL |
| 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) |
| { |
| // Duplicated from h_advances. Ugly. Keep in sync'ish. |
| |
| const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx; |
| |
| if (unlikely (!vmtx.has_data ())) |
| { |
| hb_font_extents_t font_extents; |
| font->get_h_extents_with_fallback (&font_extents); |
| hb_position_t advance = font_extents.descender - font_extents.ascender; |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = advance; |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| #ifndef HB_NO_VAR |
| if (!font->has_nonzero_coords) |
| { |
| fallback: |
| #else |
| { |
| #endif |
| // Just plain vtmx data. No need to cache. |
| for (unsigned int i = 0; i < count; i++) |
| { |
| *first_advance = font->em_scale_y (- (int) vmtx.get_advance_without_var_unscaled (*first_glyph)); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| return; |
| } |
| |
| #ifndef HB_NO_VAR |
| /* has_nonzero_coords. */ |
| |
| ot_font->check_serial (font); |
| hb_ot_font_advance_cache_t *advance_cache = ot_font->v.acquire_advance_cache (); |
| if (!advance_cache) |
| { |
| // malloc failure. Just use the fallback non-variable path. |
| goto fallback; |
| } |
| |
| /* If VVAR is present, use it.*/ |
| const OT::VVAR &VVAR = *vmtx.var_table; |
| if (VVAR.has_data ()) |
| { |
| const OT::ItemVariationStore &varStore = &VVAR + VVAR.varStore; |
| OT::hb_scalar_cache_t *varStore_cache = ot_font->v.acquire_varStore_cache (varStore); |
| |
| for (unsigned int i = 0; i < count; i++) |
| { |
| hb_position_t v; |
| unsigned cv; |
| if (advance_cache->get (*first_glyph, &cv)) |
| v = cv; |
| else |
| { |
| v = vmtx.get_advance_with_var_unscaled (*first_glyph, font, varStore_cache); |
| advance_cache->set (*first_glyph, v); |
| } |
| *first_advance = font->em_scale_y (- (int) v); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| |
| ot_font->v.release_varStore_cache (varStore_cache); |
| ot_font->v.release_advance_cache (advance_cache); |
| return; |
| } |
| |
| const auto &gvar = *ot_face->gvar; |
| if (gvar.has_data ()) |
| { |
| const auto &glyf = *ot_face->glyf; |
| auto *scratch = glyf.acquire_scratch (); |
| if (unlikely (!scratch)) |
| { |
| ot_font->v.release_advance_cache (advance_cache); |
| goto fallback; |
| } |
| OT::hb_scalar_cache_t *gvar_cache = ot_font->draw.acquire_gvar_cache (gvar); |
| |
| for (unsigned int i = 0; i < count; i++) |
| { |
| hb_position_t v; |
| unsigned cv; |
| if (advance_cache->get (*first_glyph, &cv)) |
| v = cv; |
| else |
| { |
| v = glyf.get_advance_with_var_unscaled (*first_glyph, font, true, *scratch, gvar_cache); |
| advance_cache->set (*first_glyph, v); |
| } |
| *first_advance = font->em_scale_y (- (int) v); |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); |
| } |
| |
| ot_font->draw.release_gvar_cache (gvar_cache); |
| glyf.release_scratch (scratch); |
| ot_font->v.release_advance_cache (advance_cache); |
| return; |
| } |
| |
| ot_font->v.release_advance_cache (advance_cache); |
| // No VVAR or GVAR. Just use the fallback non-variable path. |
| goto fallback; |
| #endif |
| } |
| #endif |
| |
| #ifndef HB_NO_VERTICAL |
| HB_HOT |
| static hb_bool_t |
| hb_ot_get_glyph_v_origins (hb_font_t *font, |
| void *font_data, |
| unsigned int count, |
| const hb_codepoint_t *first_glyph, |
| unsigned glyph_stride, |
| hb_position_t *first_x, |
| unsigned x_stride, |
| hb_position_t *first_y, |
| unsigned y_stride, |
| void *user_data HB_UNUSED) |
| { |
| const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| |
| /* First, set all the x values to half the advance width. */ |
| font->get_glyph_h_advances (count, |
| first_glyph, glyph_stride, |
| first_x, x_stride); |
| for (unsigned i = 0; i < count; i++) |
| { |
| *first_x /= 2; |
| first_x = &StructAtOffsetUnaligned<hb_position_t> (first_x, x_stride); |
| } |
| |
| /* The vertical origin business is messy... |
| * |
| * We allocate the cache, then have various code paths that use the cache. |
| * Each one is responsible to free it before returning. |
| */ |
| hb_ot_font_origin_cache_t *origin_cache = ot_font->v_origin.acquire_origin_cache (); |
| |
| /* If there is VORG, always use it. It uses VVAR for variations if necessary. */ |
| const OT::VORG &VORG = *ot_face->VORG; |
| if (origin_cache && VORG.has_data ()) |
| { |
| #ifndef HB_NO_VAR |
| if (!font->has_nonzero_coords) |
| #endif |
| { |
| for (unsigned i = 0; i < count; i++) |
| { |
| hb_position_t origin; |
| unsigned cv; |
| if (origin_cache->get (*first_glyph, &cv)) |
| origin = font->y_scale < 0 ? -static_cast<hb_position_t>(cv) : static_cast<hb_position_t>(cv); |
| else |
| { |
| origin = font->em_scalef_y (VORG.get_y_origin (*first_glyph)); |
| origin_cache->set (*first_glyph, font->y_scale < 0 ? -origin : origin); |
| } |
| |
| *first_y = origin; |
| |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_y = &StructAtOffsetUnaligned<hb_position_t> (first_y, y_stride); |
| } |
| } |
| #ifndef HB_NO_VAR |
| else |
| { |
| const OT::VVAR &VVAR = *ot_face->vmtx->var_table; |
| const auto &varStore = &VVAR + VVAR.varStore; |
| auto *varStore_cache = ot_font->v_origin.acquire_varStore_cache (varStore); |
| for (unsigned i = 0; i < count; i++) |
| { |
| hb_position_t origin; |
| unsigned cv; |
| if (origin_cache->get (*first_glyph, &cv)) |
| origin = font->y_scale < 0 ? -static_cast<hb_position_t>(cv) : static_cast<hb_position_t>(cv); |
| else |
| { |
| origin = font->em_scalef_y (VORG.get_y_origin (*first_glyph) + |
| VVAR.get_vorg_delta_unscaled (*first_glyph, |
| font->coords, font->num_coords, |
| varStore_cache)); |
| origin_cache->set (*first_glyph, font->y_scale < 0 ? -origin : origin); |
| } |
| |
| *first_y = origin; |
| |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_y = &StructAtOffsetUnaligned<hb_position_t> (first_y, y_stride); |
| } |
| ot_font->v_origin.release_varStore_cache (varStore_cache); |
| } |
| #endif |
| ot_font->v_origin.release_origin_cache (origin_cache); |
| return true; |
| } |
| |
| /* If and only if `vmtx` is present and it's a `glyf` font, |
| * we use the top phantom point, deduced from vmtx,glyf[,gvar]. */ |
| const auto &vmtx = *ot_face->vmtx; |
| const auto &glyf = *ot_face->glyf; |
| if (origin_cache && vmtx.has_data() && glyf.has_data ()) |
| { |
| auto *scratch = glyf.acquire_scratch (); |
| if (unlikely (!scratch)) |
| { |
| ot_font->v_origin.release_origin_cache (origin_cache); |
| return false; |
| } |
| OT::hb_scalar_cache_t *gvar_cache = font->has_nonzero_coords ? |
| ot_font->draw.acquire_gvar_cache (*ot_face->gvar) : |
| nullptr; |
| |
| for (unsigned i = 0; i < count; i++) |
| { |
| hb_position_t origin; |
| unsigned cv; |
| if (origin_cache->get (*first_glyph, &cv)) |
| origin = font->y_scale < 0 ? -static_cast<hb_position_t>(cv) : static_cast<hb_position_t>(cv); |
| else |
| { |
| origin = font->em_scalef_y (glyf.get_v_origin_with_var_unscaled (*first_glyph, font, *scratch, gvar_cache)); |
| origin_cache->set (*first_glyph, font->y_scale < 0 ? -origin : origin); |
| } |
| |
| *first_y = origin; |
| |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_y = &StructAtOffsetUnaligned<hb_position_t> (first_y, y_stride); |
| } |
| |
| if (gvar_cache) |
| ot_font->draw.release_gvar_cache (gvar_cache); |
| glyf.release_scratch (scratch); |
| ot_font->v_origin.release_origin_cache (origin_cache); |
| return true; |
| } |
| |
| /* Otherwise, use glyph extents to center the glyph vertically. |
| * If getting glyph extents failed, just use the font ascender. */ |
| if (origin_cache && font->has_glyph_extents_func ()) |
| { |
| hb_font_extents_t font_extents; |
| font->get_h_extents_with_fallback (&font_extents); |
| hb_position_t font_advance = font_extents.ascender - font_extents.descender; |
| |
| for (unsigned i = 0; i < count; i++) |
| { |
| hb_position_t origin; |
| unsigned cv; |
| |
| if (origin_cache->get (*first_glyph, &cv)) |
| origin = font->y_scale < 0 ? -static_cast<hb_position_t>(cv) : static_cast<hb_position_t>(cv); |
| else |
| { |
| hb_glyph_extents_t extents = {0}; |
| if (likely (font->get_glyph_extents (*first_glyph, &extents))) |
| origin = extents.y_bearing + ((font_advance - -extents.height) >> 1); |
| else |
| origin = font_extents.ascender; |
| |
| origin_cache->set (*first_glyph, font->y_scale < 0 ? -origin : origin); |
| } |
| |
| *first_y = origin; |
| |
| first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); |
| first_y = &StructAtOffsetUnaligned<hb_position_t> (first_y, y_stride); |
| } |
| } |
| |
| ot_font->v_origin.release_origin_cache (origin_cache); |
| return true; |
| } |
| #endif |
| |
| 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_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| |
| #if !defined(HB_NO_OT_FONT_BITMAP) && !defined(HB_NO_COLOR) |
| if (ot_face->sbix->get_extents (font, glyph, extents)) return true; |
| if (ot_face->CBDT->get_extents (font, glyph, extents)) return true; |
| #endif |
| #if !defined(HB_NO_COLOR) && !defined(HB_NO_PAINT) |
| if (ot_face->COLR->get_extents (font, glyph, extents)) return true; |
| #endif |
| #ifndef HB_NO_VAR_COMPOSITES |
| if (ot_face->VARC->get_extents (font, glyph, extents)) return true; |
| #endif |
| if (ot_face->glyf->get_extents (font, glyph, extents)) return true; |
| #ifndef HB_NO_OT_FONT_CFF |
| if (ot_face->cff2->get_extents (font, glyph, extents)) return true; |
| if (ot_face->cff1->get_extents (font, glyph, extents)) return true; |
| #endif |
| |
| return false; |
| } |
| |
| #ifndef HB_NO_OT_FONT_GLYPH_NAMES |
| 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_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| |
| if (ot_face->post->get_glyph_name (glyph, name, size)) return true; |
| #ifndef HB_NO_OT_FONT_CFF |
| if (ot_face->cff1->get_glyph_name (glyph, name, size)) return true; |
| #endif |
| return false; |
| } |
| 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_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| const hb_ot_face_t *ot_face = ot_font->ot_face; |
| |
| if (ot_face->post->get_glyph_from_name (name, len, glyph)) return true; |
| #ifndef HB_NO_OT_FONT_CFF |
| if (ot_face->cff1->get_glyph_from_name (name, len, glyph)) return true; |
| #endif |
| return false; |
| } |
| #endif |
| |
| static hb_bool_t |
| hb_ot_get_font_h_extents (hb_font_t *font, |
| void *font_data HB_UNUSED, |
| hb_font_extents_t *metrics, |
| void *user_data HB_UNUSED) |
| { |
| return _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER, &metrics->ascender) && |
| _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER, &metrics->descender) && |
| _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP, &metrics->line_gap); |
| } |
| |
| #ifndef HB_NO_VERTICAL |
| static hb_bool_t |
| hb_ot_get_font_v_extents (hb_font_t *font, |
| void *font_data HB_UNUSED, |
| hb_font_extents_t *metrics, |
| void *user_data HB_UNUSED) |
| { |
| return _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_ASCENDER, &metrics->ascender) && |
| _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_DESCENDER, &metrics->descender) && |
| _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_LINE_GAP, &metrics->line_gap); |
| } |
| #endif |
| |
| #ifndef HB_NO_DRAW |
| static hb_bool_t |
| hb_ot_draw_glyph_or_fail (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) |
| { |
| const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; |
| hb_draw_session_t draw_session {draw_funcs, draw_data}; |
| bool ret = false; |
| |
| OT::hb_scalar_cache_t *gvar_cache = nullptr; |
| if (font->num_coords) |
| { |
| ot_font->check_serial (font); |
| gvar_cache = ot_font->draw.acquire_gvar_cache (*ot_font->ot_face->gvar); |
| } |
| |
| #ifndef HB_NO_VAR_COMPOSITES |
| if (font->face->table.VARC->get_path (font, glyph, draw_session)) { ret = true; goto done; } |
| #endif |
| // Keep the following in synch with VARC::get_path_at() |
| if (font->face->table.glyf->get_path (font, glyph, draw_session, gvar_cache)) { ret = true; goto done; } |
| |
| #ifndef HB_NO_CFF |
| if (font->face->table.cff2->get_path (font, glyph, draw_session)) { ret = true; goto done; } |
| if (font->face->table.cff1->get_path (font, glyph, draw_session)) { ret = true; goto done; } |
| #endif |
| |
| done: |
| |
| ot_font->draw.release_gvar_cache (gvar_cache); |
| |
| return ret; |
| } |
| #endif |
| |
| #ifndef HB_NO_PAINT |
| static hb_bool_t |
| hb_ot_paint_glyph_or_fail (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) |
| { |
| #ifndef HB_NO_COLOR |
| if (font->face->table.COLR->paint_glyph (font, glyph, paint_funcs, paint_data, palette, foreground)) return true; |
| if (font->face->table.SVG->paint_glyph (font, glyph, paint_funcs, paint_data)) return true; |
| #ifndef HB_NO_OT_FONT_BITMAP |
| if (font->face->table.CBDT->paint_glyph (font, glyph, paint_funcs, paint_data)) return true; |
| if (font->face->table.sbix->paint_glyph (font, glyph, paint_funcs, paint_data)) return true; |
| #endif |
| #endif |
| return false; |
| } |
| #endif |
| |
| static inline void free_static_ot_funcs (); |
| |
| static struct hb_ot_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ot_font_funcs_lazy_loader_t> |
| { |
| static hb_font_funcs_t *create () |
| { |
| hb_font_funcs_t *funcs = hb_font_funcs_create (); |
| |
| hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, nullptr, nullptr); |
| hb_font_funcs_set_nominal_glyphs_func (funcs, hb_ot_get_nominal_glyphs, nullptr, nullptr); |
| hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, nullptr, nullptr); |
| |
| hb_font_funcs_set_font_h_extents_func (funcs, hb_ot_get_font_h_extents, nullptr, nullptr); |
| hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ot_get_glyph_h_advances, nullptr, nullptr); |
| |
| #ifndef HB_NO_VERTICAL |
| hb_font_funcs_set_font_v_extents_func (funcs, hb_ot_get_font_v_extents, nullptr, nullptr); |
| hb_font_funcs_set_glyph_v_advances_func (funcs, hb_ot_get_glyph_v_advances, nullptr, nullptr); |
| hb_font_funcs_set_glyph_v_origins_func (funcs, hb_ot_get_glyph_v_origins, nullptr, nullptr); |
| #endif |
| |
| #ifndef HB_NO_DRAW |
| hb_font_funcs_set_draw_glyph_or_fail_func (funcs, hb_ot_draw_glyph_or_fail, nullptr, nullptr); |
| #endif |
| |
| #ifndef HB_NO_PAINT |
| hb_font_funcs_set_paint_glyph_or_fail_func (funcs, hb_ot_paint_glyph_or_fail, nullptr, nullptr); |
| #endif |
| |
| 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); |
| |
| #ifndef HB_NO_OT_FONT_GLYPH_NAMES |
| 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); |
| #endif |
| |
| hb_font_funcs_make_immutable (funcs); |
| |
| hb_atexit (free_static_ot_funcs); |
| |
| return funcs; |
| } |
| } static_ot_funcs; |
| |
| static inline |
| void free_static_ot_funcs () |
| { |
| static_ot_funcs.free_instance (); |
| } |
| |
| static hb_font_funcs_t * |
| _hb_ot_get_font_funcs () |
| { |
| return static_ot_funcs.get_unconst (); |
| } |
| |
| |
| /** |
| * hb_ot_font_set_funcs: |
| * @font: #hb_font_t to work upon |
| * |
| * Sets the font functions to use when working with @font to |
| * the HarfBuzz's native implementation. This is the default |
| * for fonts newly created. |
| * |
| * Since: 0.9.28 |
| **/ |
| void |
| hb_ot_font_set_funcs (hb_font_t *font) |
| { |
| hb_ot_font_t *ot_font = _hb_ot_font_create (font); |
| if (unlikely (!ot_font)) |
| return; |
| |
| hb_font_set_funcs (font, |
| _hb_ot_get_font_funcs (), |
| ot_font, |
| _hb_ot_font_destroy); |
| } |
| |
| #endif |
