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/*
* 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