#include "hb-ot-cmap-table.hh"
#include "hb-ot-glyf-table.hh"
-#include "hb-ot-head-table.hh"
-#include "hb-ot-hhea-table.hh"
#include "hb-ot-hmtx-table.hh"
-#include "hb-ot-os2-table.hh"
-//#include "hb-ot-post-table.hh"
+#include "hb-ot-kern-table.hh"
+#include "hb-ot-post-table.hh"
+#include "hb-ot-color-cbdt-table.hh"
-struct hb_ot_face_metrics_accelerator_t
-{
- unsigned int num_metrics;
- unsigned int num_advances;
- unsigned int default_advance;
- unsigned short ascender;
- unsigned short descender;
- unsigned short line_gap;
-
- const OT::_mtx *table;
- hb_blob_t *blob;
-
- inline void init (hb_face_t *face,
- hb_tag_t _hea_tag,
- hb_tag_t _mtx_tag,
- hb_tag_t os2_tag)
- {
- this->default_advance = face->get_upem ();
-
- bool got_font_extents = false;
- if (os2_tag)
- {
- hb_blob_t *os2_blob = OT::Sanitizer<OT::os2>::sanitize (face->reference_table (os2_tag));
- const OT::os2 *os2 = OT::Sanitizer<OT::os2>::lock_instance (os2_blob);
-#define USE_TYPO_METRICS (1u<<7)
- if (0 != (os2->fsSelection & USE_TYPO_METRICS))
- {
- this->ascender = os2->sTypoAscender;
- this->descender = os2->sTypoDescender;
- this->line_gap = os2->sTypoLineGap;
- got_font_extents = (this->ascender | this->descender) != 0;
- }
- hb_blob_destroy (os2_blob);
- }
-
- hb_blob_t *_hea_blob = OT::Sanitizer<OT::_hea>::sanitize (face->reference_table (_hea_tag));
- const OT::_hea *_hea = OT::Sanitizer<OT::_hea>::lock_instance (_hea_blob);
- this->num_advances = _hea->numberOfLongMetrics;
- if (!got_font_extents)
- {
- this->ascender = _hea->ascender;
- this->descender = _hea->descender;
- this->line_gap = _hea->lineGap;
- }
- hb_blob_destroy (_hea_blob);
-
- this->blob = OT::Sanitizer<OT::_mtx>::sanitize (face->reference_table (_mtx_tag));
-
- /* Cap num_metrics() and num_advances() based on table length. */
- unsigned int len = hb_blob_get_length (this->blob);
- if (unlikely (this->num_advances * 4 > len))
- this->num_advances = len / 4;
- this->num_metrics = this->num_advances + (len - 4 * this->num_advances) / 2;
-
- /* We MUST set num_metrics to zero if num_advances is zero.
- * Our get_advance() depends on that. */
- if (unlikely (!this->num_advances))
- {
- this->num_metrics = this->num_advances = 0;
- hb_blob_destroy (this->blob);
- this->blob = hb_blob_get_empty ();
- }
- this->table = OT::Sanitizer<OT::_mtx>::lock_instance (this->blob);
- }
-
- inline void fini (void)
- {
- hb_blob_destroy (this->blob);
- }
-
- inline unsigned int get_advance (hb_codepoint_t glyph) const
- {
- if (unlikely (glyph >= this->num_metrics))
- {
- /* If this->num_metrics is zero, it means we don't have the metrics table
- * for this direction: return default advance. Otherwise, it means that the
- * glyph index is out of bound: return zero. */
- if (this->num_metrics)
- return 0;
- else
- return this->default_advance;
- }
-
- if (glyph >= this->num_advances)
- glyph = this->num_advances - 1;
-
- return this->table->longMetric[glyph].advance;
- }
-};
-
-struct hb_ot_face_glyf_accelerator_t
-{
- bool short_offset;
- unsigned int num_glyphs;
- const OT::loca *loca;
- const OT::glyf *glyf;
- hb_blob_t *loca_blob;
- hb_blob_t *glyf_blob;
- unsigned int glyf_len;
-
- inline void init (hb_face_t *face)
- {
- hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (face->reference_table (HB_OT_TAG_head));
- const OT::head *head = OT::Sanitizer<OT::head>::lock_instance (head_blob);
- if ((unsigned int) head->indexToLocFormat > 1 || head->glyphDataFormat != 0)
- {
- /* Unknown format. Leave num_glyphs=0, that takes care of disabling us. */
- hb_blob_destroy (head_blob);
- return;
- }
- this->short_offset = 0 == head->indexToLocFormat;
- hb_blob_destroy (head_blob);
-
- this->loca_blob = OT::Sanitizer<OT::loca>::sanitize (face->reference_table (HB_OT_TAG_loca));
- this->loca = OT::Sanitizer<OT::loca>::lock_instance (this->loca_blob);
- this->glyf_blob = OT::Sanitizer<OT::glyf>::sanitize (face->reference_table (HB_OT_TAG_glyf));
- this->glyf = OT::Sanitizer<OT::glyf>::lock_instance (this->glyf_blob);
-
- this->num_glyphs = MAX (1u, hb_blob_get_length (this->loca_blob) / (this->short_offset ? 2 : 4)) - 1;
- this->glyf_len = hb_blob_get_length (this->glyf_blob);
- }
-
- inline void fini (void)
- {
- hb_blob_destroy (this->loca_blob);
- hb_blob_destroy (this->glyf_blob);
- }
-
- inline bool get_extents (hb_codepoint_t glyph,
- hb_glyph_extents_t *extents) const
- {
- if (unlikely (glyph >= this->num_glyphs))
- return false;
-
- unsigned int start_offset, end_offset;
- if (this->short_offset)
- {
- start_offset = 2 * this->loca->u.shortsZ[glyph];
- end_offset = 2 * this->loca->u.shortsZ[glyph + 1];
- }
- else
- {
- start_offset = this->loca->u.longsZ[glyph];
- end_offset = this->loca->u.longsZ[glyph + 1];
- }
-
- if (start_offset > end_offset || end_offset > this->glyf_len)
- return false;
-
- if (end_offset - start_offset < OT::glyfGlyphHeader::static_size)
- return true; /* Empty glyph; zero extents. */
-
- const OT::glyfGlyphHeader &glyph_header = OT::StructAtOffset<OT::glyfGlyphHeader> (this->glyf, start_offset);
-
- extents->x_bearing = MIN (glyph_header.xMin, glyph_header.xMax);
- extents->y_bearing = MAX (glyph_header.yMin, glyph_header.yMax);
- extents->width = MAX (glyph_header.xMin, glyph_header.xMax) - extents->x_bearing;
- extents->height = MIN (glyph_header.yMin, glyph_header.yMax) - extents->y_bearing;
-
- return true;
- }
-};
-
-typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
- hb_codepoint_t codepoint,
- hb_codepoint_t *glyph);
-
-template <typename Type>
-static inline bool get_glyph_from (const void *obj,
- hb_codepoint_t codepoint,
- hb_codepoint_t *glyph)
-{
- const Type *typed_obj = (const Type *) obj;
- return typed_obj->get_glyph (codepoint, glyph);
-}
-
-struct hb_ot_face_cmap_accelerator_t
-{
- hb_cmap_get_glyph_func_t get_glyph_func;
- const void *get_glyph_data;
- OT::CmapSubtableFormat4::accelerator_t format4_accel;
-
- const OT::CmapSubtableFormat14 *uvs_table;
- hb_blob_t *blob;
-
- inline void init (hb_face_t *face)
- {
- this->blob = OT::Sanitizer<OT::cmap>::sanitize (face->reference_table (HB_OT_TAG_cmap));
- const OT::cmap *cmap = OT::Sanitizer<OT::cmap>::lock_instance (this->blob);
- const OT::CmapSubtable *subtable = NULL;
- const OT::CmapSubtableFormat14 *subtable_uvs = NULL;
-
- /* 32-bit subtables. */
- if (!subtable) subtable = cmap->find_subtable (3, 10);
- if (!subtable) subtable = cmap->find_subtable (0, 6);
- if (!subtable) subtable = cmap->find_subtable (0, 4);
- /* 16-bit subtables. */
- if (!subtable) subtable = cmap->find_subtable (3, 1);
- if (!subtable) subtable = cmap->find_subtable (0, 3);
- if (!subtable) subtable = cmap->find_subtable (0, 2);
- if (!subtable) subtable = cmap->find_subtable (0, 1);
- if (!subtable) subtable = cmap->find_subtable (0, 0);
- if (!subtable) subtable = cmap->find_subtable (3, 0);
- /* Meh. */
- if (!subtable) subtable = &OT::Null(OT::CmapSubtable);
-
- /* UVS subtable. */
- if (!subtable_uvs)
- {
- const OT::CmapSubtable *st = cmap->find_subtable (0, 5);
- if (st && st->u.format == 14)
- subtable_uvs = &st->u.format14;
- }
- /* Meh. */
- if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtableFormat14);
-
- this->uvs_table = subtable_uvs;
-
- this->get_glyph_data = subtable;
- switch (subtable->u.format) {
- /* Accelerate format 4 and format 12. */
- default: this->get_glyph_func = get_glyph_from<OT::CmapSubtable>; break;
- case 12: this->get_glyph_func = get_glyph_from<OT::CmapSubtableFormat12>; break;
- case 4:
- {
- this->format4_accel.init (&subtable->u.format4);
- this->get_glyph_data = &this->format4_accel;
- this->get_glyph_func = this->format4_accel.get_glyph_func;
- }
- break;
- }
- }
-
- inline void fini (void)
- {
- hb_blob_destroy (this->blob);
- }
-
- inline bool get_nominal_glyph (hb_codepoint_t unicode,
- hb_codepoint_t *glyph) const
- {
- return this->get_glyph_func (this->get_glyph_data, unicode, glyph);
- }
-
- inline bool get_variation_glyph (hb_codepoint_t unicode,
- hb_codepoint_t variation_selector,
- hb_codepoint_t *glyph) const
- {
- switch (this->uvs_table->get_glyph_variant (unicode,
- variation_selector,
- glyph))
- {
- case OT::GLYPH_VARIANT_NOT_FOUND: return false;
- case OT::GLYPH_VARIANT_FOUND: return true;
- case OT::GLYPH_VARIANT_USE_DEFAULT: break;
- }
-
- return get_nominal_glyph (unicode, glyph);
- }
-};
-
-template <typename T>
-struct hb_lazy_loader_t
-{
- inline void init (hb_face_t *face_)
- {
- face = face_;
- instance = NULL;
- }
-
- inline void fini (void)
- {
- if (instance && instance != &OT::Null(T))
- {
- instance->fini();
- free (instance);
- }
- }
-
- inline const T* operator-> (void) const
- {
- retry:
- T *p = (T *) hb_atomic_ptr_get (&instance);
- if (unlikely (!p))
- {
- p = (T *) calloc (1, sizeof (T));
- if (unlikely (!p))
- return &OT::Null(T);
- p->init (face);
- if (unlikely (!hb_atomic_ptr_cmpexch (const_cast<T **>(&instance), NULL, p)))
- {
- p->fini ();
- goto retry;
- }
- }
- return p;
- }
-
- private:
- hb_face_t *face;
- T *instance;
-};
struct hb_ot_font_t
{
- hb_ot_face_cmap_accelerator_t cmap;
- hb_ot_face_metrics_accelerator_t h_metrics;
- hb_ot_face_metrics_accelerator_t v_metrics;
- hb_lazy_loader_t<hb_ot_face_glyf_accelerator_t> glyf;
+ OT::cmap::accelerator_t cmap;
+ OT::hmtx::accelerator_t h_metrics;
+ OT::vmtx::accelerator_t v_metrics;
+ OT::hb_lazy_loader_t<OT::glyf::accelerator_t> glyf;
+ OT::hb_lazy_loader_t<OT::CBDT::accelerator_t> cbdt;
+ OT::hb_lazy_loader_t<OT::post::accelerator_t> post;
+ OT::hb_lazy_loader_t<OT::kern::accelerator_t> kern;
};
hb_ot_font_t *ot_font = (hb_ot_font_t *) calloc (1, sizeof (hb_ot_font_t));
if (unlikely (!ot_font))
- return NULL;
+ return nullptr;
ot_font->cmap.init (face);
- ot_font->h_metrics.init (face, HB_OT_TAG_hhea, HB_OT_TAG_hmtx, HB_OT_TAG_os2);
- ot_font->v_metrics.init (face, HB_OT_TAG_vhea, HB_OT_TAG_vmtx, HB_TAG_NONE); /* TODO Can we do this lazily? */
+ ot_font->h_metrics.init (face);
+ ot_font->v_metrics.init (face, ot_font->h_metrics.ascender - ot_font->h_metrics.descender); /* TODO Can we do this lazily? */
ot_font->glyf.init (face);
+ ot_font->cbdt.init (face);
+ ot_font->post.init (face);
+ ot_font->kern.init (face);
return ot_font;
}
static void
-_hb_ot_font_destroy (hb_ot_font_t *ot_font)
+_hb_ot_font_destroy (void *data)
{
+ hb_ot_font_t *ot_font = (hb_ot_font_t *) data;
+
ot_font->cmap.fini ();
ot_font->h_metrics.fini ();
ot_font->v_metrics.fini ();
ot_font->glyf.fini ();
+ ot_font->cbdt.fini ();
+ ot_font->post.fini ();
+ ot_font->kern.fini ();
free (ot_font);
}
}
static hb_position_t
-hb_ot_get_glyph_h_advance (hb_font_t *font HB_UNUSED,
+hb_ot_get_glyph_h_advance (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
void *user_data HB_UNUSED)
{
const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
- return font->em_scale_x (ot_font->h_metrics.get_advance (glyph));
+ return font->em_scale_x (ot_font->h_metrics.get_advance (glyph, font));
}
static hb_position_t
-hb_ot_get_glyph_v_advance (hb_font_t *font HB_UNUSED,
+hb_ot_get_glyph_v_advance (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
void *user_data HB_UNUSED)
{
const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
- return font->em_scale_y (-(int) ot_font->v_metrics.get_advance (glyph));
+ return font->em_scale_y (-(int) ot_font->v_metrics.get_advance (glyph, font));
+}
+
+static hb_position_t
+hb_ot_get_glyph_h_kerning (hb_font_t *font,
+ void *font_data,
+ hb_codepoint_t left_glyph,
+ hb_codepoint_t right_glyph,
+ void *user_data HB_UNUSED)
+{
+ const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
+ return font->em_scale_x (ot_font->kern->get_h_kerning (left_glyph, right_glyph));
}
static hb_bool_t
-hb_ot_get_glyph_extents (hb_font_t *font HB_UNUSED,
+hb_ot_get_glyph_extents (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents,
{
const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
bool ret = ot_font->glyf->get_extents (glyph, extents);
+ if (!ret)
+ ret = ot_font->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);
}
static hb_bool_t
-hb_ot_get_font_h_extents (hb_font_t *font HB_UNUSED,
+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;
+ return ot_font->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_font_t *ot_font = (const hb_ot_font_t *) font_data;
+ return ot_font->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)
metrics->ascender = font->em_scale_y (ot_font->h_metrics.ascender);
metrics->descender = font->em_scale_y (ot_font->h_metrics.descender);
metrics->line_gap = font->em_scale_y (ot_font->h_metrics.line_gap);
- return true;
+ // TODO Hook up variations.
+ return ot_font->h_metrics.has_font_extents;
}
static hb_bool_t
-hb_ot_get_font_v_extents (hb_font_t *font HB_UNUSED,
+hb_ot_get_font_v_extents (hb_font_t *font,
void *font_data,
hb_font_extents_t *metrics,
void *user_data HB_UNUSED)
metrics->ascender = font->em_scale_x (ot_font->v_metrics.ascender);
metrics->descender = font->em_scale_x (ot_font->v_metrics.descender);
metrics->line_gap = font->em_scale_x (ot_font->v_metrics.line_gap);
- return true;
+ // TODO Hook up variations.
+ return ot_font->v_metrics.has_font_extents;
}
-static hb_font_funcs_t *static_ot_funcs = NULL;
+static hb_font_funcs_t *static_ot_funcs = nullptr;
#ifdef HB_USE_ATEXIT
static
void free_static_ot_funcs (void)
{
- hb_font_funcs_destroy (static_ot_funcs);
+retry:
+ hb_font_funcs_t *ot_funcs = (hb_font_funcs_t *) hb_atomic_ptr_get (&static_ot_funcs);
+ if (!hb_atomic_ptr_cmpexch (&static_ot_funcs, ot_funcs, nullptr))
+ goto retry;
+
+ hb_font_funcs_destroy (ot_funcs);
}
#endif
{
funcs = hb_font_funcs_create ();
- hb_font_funcs_set_font_h_extents_func (funcs, hb_ot_get_font_h_extents, NULL, NULL);
- hb_font_funcs_set_font_v_extents_func (funcs, hb_ot_get_font_v_extents, NULL, NULL);
- hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, NULL, NULL);
- hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, NULL, NULL);
- hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ot_get_glyph_h_advance, NULL, NULL);
- hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ot_get_glyph_v_advance, NULL, NULL);
- //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, NULL, NULL);
- //hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ot_get_glyph_v_origin, NULL, NULL);
- //hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ot_get_glyph_h_kerning, NULL, NULL); TODO
- //hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ot_get_glyph_v_kerning, NULL, NULL);
- hb_font_funcs_set_glyph_extents_func (funcs, hb_ot_get_glyph_extents, NULL, NULL);
- //hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ot_get_glyph_contour_point, NULL, NULL); TODO
- //hb_font_funcs_set_glyph_name_func (funcs, hb_ot_get_glyph_name, NULL, NULL); TODO
- //hb_font_funcs_set_glyph_from_name_func (funcs, hb_ot_get_glyph_from_name, NULL, NULL); TODO
+ 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_advance_func (funcs, hb_ot_get_glyph_h_advance, nullptr, nullptr);
+ hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ot_get_glyph_v_advance, 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_h_kerning_func (funcs, hb_ot_get_glyph_h_kerning, nullptr, nullptr);
+ //hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ot_get_glyph_v_kerning, 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);
- if (!hb_atomic_ptr_cmpexch (&static_ot_funcs, NULL, funcs)) {
+ if (!hb_atomic_ptr_cmpexch (&static_ot_funcs, nullptr, funcs)) {
hb_font_funcs_destroy (funcs);
goto retry;
}
hb_font_set_funcs (font,
_hb_ot_get_font_funcs (),
ot_font,
- (hb_destroy_func_t) _hb_ot_font_destroy);
+ _hb_ot_font_destroy);
}
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