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[coretext] Start implementing CoreText font-funcs

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Does nominal glyph mapping, horiz advances, and draw so far.
This commit is contained in:
Behdad Esfahbod 2024-10-10 12:56:31 -06:00
parent 064b24177b
commit 8a805271a1
6 changed files with 338 additions and 9 deletions
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20
perf/benchmark-font.cc
View file

@ -11,6 +11,9 @@
#ifdef HAVE_FREETYPE
#include "hb-ft.h"
#endif
#ifdef HAVE_CORETEXT
#include "hb-coretext.h"
#endif
#define SUBSET_FONT_BASE_PATH "test/subset/data/fonts/"
@ -34,7 +37,7 @@ struct test_input_t
static test_input_t *tests = default_tests;
static unsigned num_tests = sizeof (default_tests) / sizeof (default_tests[0]);
enum backend_t { HARFBUZZ, FREETYPE };
enum backend_t { HARFBUZZ, FREETYPE, CORETEXT };
enum operation_t
{
@ -124,6 +127,12 @@ static void BM_Font (benchmark::State &state,
case FREETYPE:
#ifdef HAVE_FREETYPE
hb_ft_font_set_funcs (font);
#endif
break;
case CORETEXT:
#ifdef HAVE_CORETEXT
hb_coretext_font_set_funcs (font);
#endif
break;
}
@ -224,6 +233,12 @@ static void BM_Font (benchmark::State &state,
case FREETYPE:
#ifdef HAVE_FREETYPE
hb_ft_font_set_funcs (font);
#endif
break;
case CORETEXT:
#ifdef HAVE_CORETEXT
hb_coretext_font_set_funcs (font);
#endif
break;
}
@ -280,6 +295,9 @@ static void test_operation (operation_t op,
test_backend (HARFBUZZ, "hb", is_var, op, op_name, time_unit, test_input);
#ifdef HAVE_FREETYPE
test_backend (FREETYPE, "ft", is_var, op, op_name, time_unit, test_input);
#endif
#ifdef HAVE_CORETEXT
test_backend (CORETEXT, "coretext", is_var, op, op_name, time_unit, test_input);
#endif
}
}

1
src/harfbuzz.cc
View file

@ -6,6 +6,7 @@
#include "hb-buffer-verify.cc"
#include "hb-buffer.cc"
#include "hb-common.cc"
#include "hb-coretext-font.cc"
#include "hb-coretext-shape.cc"
#include "hb-directwrite.cc"
#include "hb-draw.cc"

301
src/hb-coretext-font.cc Normal file
View file

@ -0,0 +1,301 @@
/*
* Copyright © 2024 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.
*
* Author(s): Behdad Esfahbod
*/
#include "hb.hh"
#ifdef HAVE_CORETEXT
#include "hb-coretext.h"
#include "hb-draw.hh"
#include "hb-font.hh"
#include "hb-machinery.hh"
#define MAX_GLYPHS 64u
static void
_hb_coretext_font_destroy (void *font_data)
{
CTFontRef ct_font = (CTFontRef) font_data;
CFRelease (ct_font);
}
static hb_bool_t
hb_coretext_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)
{
CTFontRef ct_font = (CTFontRef) font_data;
UniChar ch = unicode;
CGGlyph cg_glyph;
if (CTFontGetGlyphsForCharacters (ct_font, &ch, &cg_glyph, 1))
{
*glyph = cg_glyph;
return true;
}
return false;
}
static unsigned int
hb_coretext_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)
{
CTFontRef ct_font = (CTFontRef) font_data;
UniChar ch[MAX_GLYPHS];
CGGlyph cg_glyph[MAX_GLYPHS];
for (unsigned i = 0; i < count; i += MAX_GLYPHS)
{
unsigned c = (unsigned) hb_min ((int) MAX_GLYPHS, (int) count - (int) i);
for (unsigned j = 0; j < c; j++)
{
ch[j] = *first_unicode;
first_unicode = &StructAtOffset<const hb_codepoint_t> (first_unicode, unicode_stride);
}
CTFontGetGlyphsForCharacters (ct_font, ch, cg_glyph, c);
for (unsigned j = 0; j < c; j++)
{
*first_glyph = cg_glyph[j];
first_glyph = &StructAtOffset<hb_codepoint_t> (first_glyph, glyph_stride);
}
}
return count;
}
static hb_bool_t
hb_coretext_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)
{
// TODO. How?
return false;
}
static void
hb_coretext_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)
{
CTFontRef ct_font = (CTFontRef) font_data;
CGFloat ct_font_size = CTFontGetSize (ct_font);
CGFloat x_mult = (CGFloat) font->x_scale / ct_font_size;
CGGlyph cg_glyph[MAX_GLYPHS];
CGSize advances[MAX_GLYPHS];
for (unsigned i = 0; i < count; i += MAX_GLYPHS)
{
unsigned c = (unsigned) hb_min ((int) MAX_GLYPHS, (int) count - (int) i);
for (unsigned j = 0; j < c; j++)
{
cg_glyph[j] = *first_glyph;
first_glyph = &StructAtOffset<const hb_codepoint_t> (first_glyph, glyph_stride);
}
CTFontGetAdvancesForGlyphs (ct_font, kCTFontOrientationHorizontal, cg_glyph, advances, c);
for (unsigned j = 0; j < c; j++)
{
*first_advance = round (advances[j].width * x_mult);
first_advance = &StructAtOffset<hb_position_t> (first_advance, advance_stride);
}
}
}
static hb_bool_t
hb_coretext_get_glyph_extents (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents,
void *user_data HB_UNUSED)
{
// TODO
return false;
}
static hb_bool_t
hb_coretext_get_font_h_extents (hb_font_t *font,
void *font_data HB_UNUSED,
hb_font_extents_t *metrics,
void *user_data HB_UNUSED)
{
// TODO
return false;
}
#ifndef HB_NO_DRAW
static void
ct_apply_func (void *info, const CGPathElement *element)
{
hb_draw_session_t *draws = (hb_draw_session_t *) info;
switch (element->type)
{
case kCGPathElementMoveToPoint:
draws->move_to (element->points[0].x, element->points[0].y);
break;
case kCGPathElementAddLineToPoint:
draws->line_to (element->points[0].x, element->points[0].y);
break;
case kCGPathElementAddQuadCurveToPoint:
draws->quadratic_to (element->points[0].x, element->points[0].y,
element->points[1].x, element->points[1].y);
break;
case kCGPathElementAddCurveToPoint:
draws->cubic_to (element->points[0].x, element->points[0].y,
element->points[1].x, element->points[1].y,
element->points[2].x, element->points[2].y);
break;
case kCGPathElementCloseSubpath:
draws->close_path ();
break;
}
}
static void
hb_coretext_draw_glyph (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)
{
CTFontRef ct_font = (CTFontRef) font_data;
CGFloat ct_font_size = CTFontGetSize (ct_font);
CGFloat x_mult = (CGFloat) font->x_scale / ct_font_size;
CGFloat y_mult = (CGFloat) font->y_scale / ct_font_size;
CGAffineTransform transform = CGAffineTransformIdentity;
transform = CGAffineTransformScale (transform, x_mult, y_mult);
CGPathRef path = CTFontCreatePathForGlyph (ct_font, glyph, &transform);
if (!path)
return;
hb_draw_session_t drawing = {draw_funcs, draw_data, font->slant};
CGPathApply (path, &drawing, ct_apply_func);
CFRelease (path);
}
#endif
static inline void free_static_coretext_funcs ();
static struct hb_coretext_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_coretext_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_coretext_get_nominal_glyph, nullptr, nullptr);
hb_font_funcs_set_nominal_glyphs_func (funcs, hb_coretext_get_nominal_glyphs, nullptr, nullptr);
hb_font_funcs_set_variation_glyph_func (funcs, hb_coretext_get_variation_glyph, nullptr, nullptr);
hb_font_funcs_set_font_h_extents_func (funcs, hb_coretext_get_font_h_extents, nullptr, nullptr);
hb_font_funcs_set_glyph_h_advances_func (funcs, hb_coretext_get_glyph_h_advances, nullptr, nullptr);
//hb_font_funcs_set_glyph_h_origin_func (funcs, hb_coretext_get_glyph_h_origin, nullptr, nullptr);
#ifndef HB_NO_VERTICAL
//hb_font_funcs_set_font_v_extents_func (funcs, hb_coretext_get_font_v_extents, nullptr, nullptr);
//hb_font_funcs_set_glyph_v_advances_func (funcs, hb_coretext_get_glyph_v_advances, nullptr, nullptr);
//hb_font_funcs_set_glyph_v_origin_func (funcs, hb_coretext_get_glyph_v_origin, nullptr, nullptr);
#endif
#ifndef HB_NO_DRAW
hb_font_funcs_set_draw_glyph_func (funcs, hb_coretext_draw_glyph, nullptr, nullptr);
#endif
hb_font_funcs_set_glyph_extents_func (funcs, hb_coretext_get_glyph_extents, nullptr, nullptr);
#ifndef HB_NO_OT_FONT_GLYPH_NAMES
//hb_font_funcs_set_glyph_name_func (funcs, hb_coretext_get_glyph_name, nullptr, nullptr);
//hb_font_funcs_set_glyph_from_name_func (funcs, hb_coretext_get_glyph_from_name, nullptr, nullptr);
#endif
hb_font_funcs_make_immutable (funcs);
hb_atexit (free_static_coretext_funcs);
return funcs;
}
} static_coretext_funcs;
static inline
void free_static_coretext_funcs ()
{
static_coretext_funcs.free_instance ();
}
static hb_font_funcs_t *
_hb_coretext_get_font_funcs ()
{
return static_coretext_funcs.get_unconst ();
}
/**
* hb_coretext_font_set_funcs:
* @font: #hb_font_t to work upon
*
* Sets the font functions to use when working with @font.
*
* Since: 0.9.28
**/
void
hb_coretext_font_set_funcs (hb_font_t *font)
{
CTFontRef ct_font = hb_coretext_font_get_ct_font (font);
if (unlikely (!ct_font))
return;
hb_font_set_funcs (font,
_hb_coretext_get_font_funcs (),
(void *) CFRetain (ct_font),
_hb_coretext_font_destroy);
}
#undef MAX_GLYPHS
#endif

13
src/hb-coretext.h
View file

@ -44,9 +44,9 @@ HB_BEGIN_DECLS
* HB_CORETEXT_TAG_MORT:
*
* The #hb_tag_t tag for the `mort` (glyph metamorphosis) table,
* which holds AAT features.
* which holds AAT features.
*
* For more information, see
* For more information, see
* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6mort.html
*
**/
@ -56,7 +56,7 @@ HB_BEGIN_DECLS
* HB_CORETEXT_TAG_MORX:
*
* The #hb_tag_t tag for the `morx` (extended glyph metamorphosis)
* table, which holds AAT features.
* table, which holds AAT features.
*
* For more information, see
* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6morx.html
@ -68,9 +68,9 @@ HB_BEGIN_DECLS
* HB_CORETEXT_TAG_KERX:
*
* The #hb_tag_t tag for the `kerx` (extended kerning) table, which
* holds AAT kerning information.
* holds AAT kerning information.
*
* For more information, see
* For more information, see
* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6kerx.html
*
**/
@ -90,6 +90,9 @@ hb_coretext_face_get_cg_font (hb_face_t *face);
HB_EXTERN CTFontRef
hb_coretext_font_get_ct_font (hb_font_t *font);
HB_EXTERN void
hb_coretext_font_set_funcs (hb_font_t *font);
HB_END_DECLS

2
src/meson.build
View file

@ -346,7 +346,7 @@ hb_wasm_headers = files()
# System-dependent sources and headers
hb_coretext_sources = files('hb-coretext-shape.cc')
hb_coretext_sources = files('hb-coretext-shape.cc', 'hb-coretext-font.cc')
hb_coretext_headers = files('hb-coretext.h')
hb_directwrite_sources = files('hb-directwrite.cc')

10
util/font-options.hh
View file

@ -29,10 +29,13 @@
#include "face-options.hh"
#include <hb-ot.h>
#ifdef HAVE_FREETYPE
#include <hb-ft.h>
#endif
#include <hb-ot.h>
#ifdef HAVE_CORETEXT
#include <hb-coretext.h>
#endif
#define FONT_SIZE_UPEM 0x7FFFFFFF
#define FONT_SIZE_NONE 0
@ -79,7 +82,7 @@ struct font_options_t : face_options_t
static struct supported_font_funcs_t {
char name[4];
char name[9];
void (*func) (hb_font_t *);
} supported_font_funcs[] =
{
@ -87,6 +90,9 @@ static struct supported_font_funcs_t {
#ifdef HAVE_FREETYPE
{"ft", hb_ft_font_set_funcs},
#endif
#ifdef HAVE_CORETEXT
{"coretext", hb_coretext_font_set_funcs},
#endif
};