1397 lines
50 KiB
C++
1397 lines
50 KiB
C++
/*
|
|
* Copyright © 2012,2013 Mozilla Foundation.
|
|
* Copyright © 2012,2013 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.
|
|
*
|
|
* Mozilla Author(s): Jonathan Kew
|
|
* Google Author(s): Behdad Esfahbod
|
|
*/
|
|
|
|
#define HB_SHAPER coretext
|
|
|
|
#include "hb-private.hh"
|
|
#include "hb-debug.hh"
|
|
#include "hb-shaper-impl-private.hh"
|
|
|
|
#include "hb-coretext.h"
|
|
#include <math.h>
|
|
|
|
/* https://developer.apple.com/documentation/coretext/1508745-ctfontcreatewithgraphicsfont */
|
|
#define HB_CORETEXT_DEFAULT_FONT_SIZE 12.f
|
|
|
|
static CGFloat
|
|
coretext_font_size_from_ptem (float ptem)
|
|
{
|
|
/* CoreText points are CSS pixels (96 per inch),
|
|
* NOT typographic points (72 per inch).
|
|
*
|
|
* https://developer.apple.com/library/content/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/Explained/Explained.html
|
|
*/
|
|
ptem *= 96.f / 72.f;
|
|
return ptem <= 0.f ? HB_CORETEXT_DEFAULT_FONT_SIZE : ptem;
|
|
}
|
|
static float
|
|
coretext_font_size_to_ptem (CGFloat size)
|
|
{
|
|
size *= 72.f / 96.f;
|
|
return size <= 0.f ? 0 : size;
|
|
}
|
|
|
|
static void
|
|
release_table_data (void *user_data)
|
|
{
|
|
CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data);
|
|
CFRelease(cf_data);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data);
|
|
CFDataRef cf_data = CGFontCopyTableForTag (cg_font, tag);
|
|
if (unlikely (!cf_data))
|
|
return nullptr;
|
|
|
|
const char *data = reinterpret_cast<const char*> (CFDataGetBytePtr (cf_data));
|
|
const size_t length = CFDataGetLength (cf_data);
|
|
if (!data || !length)
|
|
return nullptr;
|
|
|
|
return hb_blob_create (data, length, HB_MEMORY_MODE_READONLY,
|
|
reinterpret_cast<void *> (const_cast<__CFData *> (cf_data)),
|
|
release_table_data);
|
|
}
|
|
|
|
static void
|
|
_hb_cg_font_release (void *data)
|
|
{
|
|
CGFontRelease ((CGFontRef) data);
|
|
}
|
|
|
|
|
|
HB_SHAPER_DATA_ENSURE_DEFINE(coretext, face)
|
|
HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(coretext, font,
|
|
fabs (CTFontGetSize((CTFontRef) data) - coretext_font_size_from_ptem (font->ptem)) <= .5
|
|
)
|
|
|
|
static CTFontDescriptorRef
|
|
get_last_resort_font_desc (void)
|
|
{
|
|
// TODO Handle allocation failures?
|
|
CTFontDescriptorRef last_resort = CTFontDescriptorCreateWithNameAndSize (CFSTR("LastResort"), 0);
|
|
CFArrayRef cascade_list = CFArrayCreate (kCFAllocatorDefault,
|
|
(const void **) &last_resort,
|
|
1,
|
|
&kCFTypeArrayCallBacks);
|
|
CFRelease (last_resort);
|
|
CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) &kCTFontCascadeListAttribute,
|
|
(const void **) &cascade_list,
|
|
1,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
CFRelease (cascade_list);
|
|
|
|
CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes);
|
|
CFRelease (attributes);
|
|
return font_desc;
|
|
}
|
|
|
|
static void
|
|
release_data (void *info, const void *data, size_t size)
|
|
{
|
|
assert (hb_blob_get_length ((hb_blob_t *) info) == size &&
|
|
hb_blob_get_data ((hb_blob_t *) info, nullptr) == data);
|
|
|
|
hb_blob_destroy ((hb_blob_t *) info);
|
|
}
|
|
|
|
static CGFontRef
|
|
create_cg_font (hb_face_t *face)
|
|
{
|
|
CGFontRef cg_font = nullptr;
|
|
if (face->destroy == _hb_cg_font_release)
|
|
{
|
|
cg_font = CGFontRetain ((CGFontRef) face->user_data);
|
|
}
|
|
else
|
|
{
|
|
hb_blob_t *blob = hb_face_reference_blob (face);
|
|
unsigned int blob_length;
|
|
const char *blob_data = hb_blob_get_data (blob, &blob_length);
|
|
if (unlikely (!blob_length))
|
|
DEBUG_MSG (CORETEXT, face, "Face has empty blob");
|
|
|
|
CGDataProviderRef provider = CGDataProviderCreateWithData (blob, blob_data, blob_length, &release_data);
|
|
if (likely (provider))
|
|
{
|
|
cg_font = CGFontCreateWithDataProvider (provider);
|
|
if (unlikely (!cg_font))
|
|
DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed");
|
|
CGDataProviderRelease (provider);
|
|
}
|
|
}
|
|
return cg_font;
|
|
}
|
|
|
|
static CTFontRef
|
|
create_ct_font (CGFontRef cg_font, CGFloat font_size)
|
|
{
|
|
CTFontRef ct_font = nullptr;
|
|
|
|
/* CoreText does not enable trak table usage / tracking when creating a CTFont
|
|
* using CTFontCreateWithGraphicsFont. The only way of enabling tracking seems
|
|
* to be through the CTFontCreateUIFontForLanguage call. */
|
|
CFStringRef cg_postscript_name = CGFontCopyPostScriptName (cg_font);
|
|
if (CFStringHasPrefix (cg_postscript_name, CFSTR (".SFNSText")) ||
|
|
CFStringHasPrefix (cg_postscript_name, CFSTR (".SFNSDisplay")))
|
|
{
|
|
CTFontUIFontType font_type = kCTFontUIFontSystem;
|
|
if (CFStringHasSuffix (cg_postscript_name, CFSTR ("-Bold")))
|
|
font_type = kCTFontUIFontEmphasizedSystem;
|
|
|
|
ct_font = CTFontCreateUIFontForLanguage (font_type, font_size, nullptr);
|
|
CFStringRef ct_result_name = CTFontCopyPostScriptName(ct_font);
|
|
if (CFStringCompare (ct_result_name, cg_postscript_name, 0) != kCFCompareEqualTo)
|
|
{
|
|
CFRelease(ct_font);
|
|
ct_font = nullptr;
|
|
}
|
|
CFRelease (ct_result_name);
|
|
}
|
|
CFRelease (cg_postscript_name);
|
|
|
|
if (!ct_font)
|
|
ct_font = CTFontCreateWithGraphicsFont (cg_font, font_size, nullptr, nullptr);
|
|
|
|
if (unlikely (!ct_font)) {
|
|
DEBUG_MSG (CORETEXT, cg_font, "Font CTFontCreateWithGraphicsFont() failed");
|
|
return nullptr;
|
|
}
|
|
|
|
/* crbug.com/576941 and crbug.com/625902 and the investigation in the latter
|
|
* bug indicate that the cascade list reconfiguration occasionally causes
|
|
* crashes in CoreText on OS X 10.9, thus let's skip this step on older
|
|
* operating system versions. Except for the emoji font, where _not_
|
|
* reconfiguring the cascade list causes CoreText crashes. For details, see
|
|
* crbug.com/549610 */
|
|
// 0x00070000 stands for "kCTVersionNumber10_10", see CoreText.h
|
|
if (&CTGetCoreTextVersion != nullptr && CTGetCoreTextVersion() < 0x00070000) {
|
|
CFStringRef fontName = CTFontCopyPostScriptName (ct_font);
|
|
bool isEmojiFont = CFStringCompare (fontName, CFSTR("AppleColorEmoji"), 0) == kCFCompareEqualTo;
|
|
CFRelease (fontName);
|
|
if (!isEmojiFont)
|
|
return ct_font;
|
|
}
|
|
|
|
CFURLRef original_url = (CFURLRef)CTFontCopyAttribute(ct_font, kCTFontURLAttribute);
|
|
|
|
/* Create font copy with cascade list that has LastResort first; this speeds up CoreText
|
|
* font fallback which we don't need anyway. */
|
|
{
|
|
CTFontDescriptorRef last_resort_font_desc = get_last_resort_font_desc ();
|
|
CTFontRef new_ct_font = CTFontCreateCopyWithAttributes (ct_font, 0.0, nullptr, last_resort_font_desc);
|
|
CFRelease (last_resort_font_desc);
|
|
if (new_ct_font)
|
|
{
|
|
/* The CTFontCreateCopyWithAttributes call fails to stay on the same font
|
|
* when reconfiguring the cascade list and may switch to a different font
|
|
* when there are fonts that go by the same name, since the descriptor is
|
|
* just name and size.
|
|
*
|
|
* Avoid reconfiguring the cascade lists if the new font is outside the
|
|
* system locations that we cannot access from the sandboxed renderer
|
|
* process in Blink. This can be detected by the new file URL location
|
|
* that the newly found font points to. */
|
|
CFURLRef new_url = (CFURLRef) CTFontCopyAttribute (new_ct_font, kCTFontURLAttribute);
|
|
// Keep reconfigured font if URL cannot be retrieved (seems to be the case
|
|
// on Mac OS 10.12 Sierra), speculative fix for crbug.com/625606
|
|
if (!original_url || !new_url || CFEqual (original_url, new_url)) {
|
|
CFRelease (ct_font);
|
|
ct_font = new_ct_font;
|
|
} else {
|
|
CFRelease (new_ct_font);
|
|
DEBUG_MSG (CORETEXT, ct_font, "Discarding reconfigured CTFont, location changed.");
|
|
}
|
|
if (new_url)
|
|
CFRelease (new_url);
|
|
}
|
|
else
|
|
DEBUG_MSG (CORETEXT, ct_font, "Font copy with empty cascade list failed");
|
|
}
|
|
|
|
if (original_url)
|
|
CFRelease (original_url);
|
|
return ct_font;
|
|
}
|
|
|
|
hb_coretext_shaper_face_data_t *
|
|
_hb_coretext_shaper_face_data_create (hb_face_t *face)
|
|
{
|
|
CGFontRef cg_font = create_cg_font (face);
|
|
|
|
if (unlikely (!cg_font))
|
|
{
|
|
DEBUG_MSG (CORETEXT, face, "CGFont creation failed..");
|
|
return nullptr;
|
|
}
|
|
|
|
return (hb_coretext_shaper_face_data_t *) cg_font;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data)
|
|
{
|
|
CFRelease ((CGFontRef) data);
|
|
}
|
|
|
|
hb_face_t *
|
|
hb_coretext_face_create (CGFontRef cg_font)
|
|
{
|
|
return hb_face_create_for_tables (reference_table, CGFontRetain (cg_font), _hb_cg_font_release);
|
|
}
|
|
|
|
/*
|
|
* Since: 0.9.10
|
|
*/
|
|
CGFontRef
|
|
hb_coretext_face_get_cg_font (hb_face_t *face)
|
|
{
|
|
if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return nullptr;
|
|
return (CGFontRef) HB_SHAPER_DATA_GET (face);
|
|
}
|
|
|
|
|
|
hb_coretext_shaper_font_data_t *
|
|
_hb_coretext_shaper_font_data_create (hb_font_t *font)
|
|
{
|
|
hb_face_t *face = font->face;
|
|
if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return nullptr;
|
|
CGFontRef cg_font = (CGFontRef) HB_SHAPER_DATA_GET (face);
|
|
|
|
CTFontRef ct_font = create_ct_font (cg_font, coretext_font_size_from_ptem (font->ptem));
|
|
|
|
if (unlikely (!ct_font))
|
|
{
|
|
DEBUG_MSG (CORETEXT, font, "CGFont creation failed..");
|
|
return nullptr;
|
|
}
|
|
|
|
return (hb_coretext_shaper_font_data_t *) ct_font;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data)
|
|
{
|
|
CFRelease ((CTFontRef) data);
|
|
}
|
|
|
|
/*
|
|
* Since: 1.7.2
|
|
*/
|
|
hb_font_t *
|
|
hb_coretext_font_create (CTFontRef ct_font)
|
|
{
|
|
CGFontRef cg_font = CTFontCopyGraphicsFont (ct_font, 0);
|
|
hb_face_t *face = hb_coretext_face_create (cg_font);
|
|
CFRelease (cg_font);
|
|
hb_font_t *font = hb_font_create (face);
|
|
hb_face_destroy (face);
|
|
|
|
if (unlikely (hb_object_is_inert (font)))
|
|
return font;
|
|
|
|
hb_font_set_ptem (font, coretext_font_size_to_ptem (CTFontGetSize(ct_font)));
|
|
|
|
/* Let there be dragons here... */
|
|
HB_SHAPER_DATA_GET (font) = (hb_coretext_shaper_font_data_t *) CFRetain (ct_font);
|
|
|
|
return font;
|
|
}
|
|
|
|
CTFontRef
|
|
hb_coretext_font_get_ct_font (hb_font_t *font)
|
|
{
|
|
if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return nullptr;
|
|
return (CTFontRef) HB_SHAPER_DATA_GET (font);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* shaper shape_plan data
|
|
*/
|
|
|
|
struct hb_coretext_shaper_shape_plan_data_t {};
|
|
|
|
hb_coretext_shaper_shape_plan_data_t *
|
|
_hb_coretext_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
|
|
const hb_feature_t *user_features HB_UNUSED,
|
|
unsigned int num_user_features HB_UNUSED,
|
|
const int *coords HB_UNUSED,
|
|
unsigned int num_coords HB_UNUSED)
|
|
{
|
|
return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper
|
|
*/
|
|
|
|
struct feature_record_t {
|
|
unsigned int feature;
|
|
unsigned int setting;
|
|
};
|
|
|
|
struct active_feature_t {
|
|
feature_record_t rec;
|
|
unsigned int order;
|
|
|
|
static int cmp (const void *pa, const void *pb) {
|
|
const active_feature_t *a = (const active_feature_t *) pa;
|
|
const active_feature_t *b = (const active_feature_t *) pb;
|
|
return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 :
|
|
a->order < b->order ? -1 : a->order > b->order ? 1 :
|
|
a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 :
|
|
0;
|
|
}
|
|
bool operator== (const active_feature_t *f) {
|
|
return cmp (this, f) == 0;
|
|
}
|
|
};
|
|
|
|
struct feature_event_t {
|
|
unsigned int index;
|
|
bool start;
|
|
active_feature_t feature;
|
|
|
|
static int cmp (const void *pa, const void *pb) {
|
|
const feature_event_t *a = (const feature_event_t *) pa;
|
|
const feature_event_t *b = (const feature_event_t *) pb;
|
|
return a->index < b->index ? -1 : a->index > b->index ? 1 :
|
|
a->start < b->start ? -1 : a->start > b->start ? 1 :
|
|
active_feature_t::cmp (&a->feature, &b->feature);
|
|
}
|
|
};
|
|
|
|
struct range_record_t {
|
|
CTFontRef font;
|
|
unsigned int index_first; /* == start */
|
|
unsigned int index_last; /* == end - 1 */
|
|
};
|
|
|
|
|
|
/* The following enum members are added in OS X 10.8. */
|
|
#define kAltHalfWidthTextSelector 6
|
|
#define kAltProportionalTextSelector 5
|
|
#define kAlternateHorizKanaOffSelector 1
|
|
#define kAlternateHorizKanaOnSelector 0
|
|
#define kAlternateKanaType 34
|
|
#define kAlternateVertKanaOffSelector 3
|
|
#define kAlternateVertKanaOnSelector 2
|
|
#define kCaseSensitiveLayoutOffSelector 1
|
|
#define kCaseSensitiveLayoutOnSelector 0
|
|
#define kCaseSensitiveLayoutType 33
|
|
#define kCaseSensitiveSpacingOffSelector 3
|
|
#define kCaseSensitiveSpacingOnSelector 2
|
|
#define kContextualAlternatesOffSelector 1
|
|
#define kContextualAlternatesOnSelector 0
|
|
#define kContextualAlternatesType 36
|
|
#define kContextualLigaturesOffSelector 19
|
|
#define kContextualLigaturesOnSelector 18
|
|
#define kContextualSwashAlternatesOffSelector 5
|
|
#define kContextualSwashAlternatesOnSelector 4
|
|
#define kDefaultLowerCaseSelector 0
|
|
#define kDefaultUpperCaseSelector 0
|
|
#define kHistoricalLigaturesOffSelector 21
|
|
#define kHistoricalLigaturesOnSelector 20
|
|
#define kHojoCharactersSelector 12
|
|
#define kJIS2004CharactersSelector 11
|
|
#define kLowerCasePetiteCapsSelector 2
|
|
#define kLowerCaseSmallCapsSelector 1
|
|
#define kLowerCaseType 37
|
|
#define kMathematicalGreekOffSelector 11
|
|
#define kMathematicalGreekOnSelector 10
|
|
#define kNLCCharactersSelector 13
|
|
#define kQuarterWidthTextSelector 4
|
|
#define kScientificInferiorsSelector 4
|
|
#define kStylisticAltEightOffSelector 17
|
|
#define kStylisticAltEightOnSelector 16
|
|
#define kStylisticAltEighteenOffSelector 37
|
|
#define kStylisticAltEighteenOnSelector 36
|
|
#define kStylisticAltElevenOffSelector 23
|
|
#define kStylisticAltElevenOnSelector 22
|
|
#define kStylisticAltFifteenOffSelector 31
|
|
#define kStylisticAltFifteenOnSelector 30
|
|
#define kStylisticAltFiveOffSelector 11
|
|
#define kStylisticAltFiveOnSelector 10
|
|
#define kStylisticAltFourOffSelector 9
|
|
#define kStylisticAltFourOnSelector 8
|
|
#define kStylisticAltFourteenOffSelector 29
|
|
#define kStylisticAltFourteenOnSelector 28
|
|
#define kStylisticAltNineOffSelector 19
|
|
#define kStylisticAltNineOnSelector 18
|
|
#define kStylisticAltNineteenOffSelector 39
|
|
#define kStylisticAltNineteenOnSelector 38
|
|
#define kStylisticAltOneOffSelector 3
|
|
#define kStylisticAltOneOnSelector 2
|
|
#define kStylisticAltSevenOffSelector 15
|
|
#define kStylisticAltSevenOnSelector 14
|
|
#define kStylisticAltSeventeenOffSelector 35
|
|
#define kStylisticAltSeventeenOnSelector 34
|
|
#define kStylisticAltSixOffSelector 13
|
|
#define kStylisticAltSixOnSelector 12
|
|
#define kStylisticAltSixteenOffSelector 33
|
|
#define kStylisticAltSixteenOnSelector 32
|
|
#define kStylisticAltTenOffSelector 21
|
|
#define kStylisticAltTenOnSelector 20
|
|
#define kStylisticAltThirteenOffSelector 27
|
|
#define kStylisticAltThirteenOnSelector 26
|
|
#define kStylisticAltThreeOffSelector 7
|
|
#define kStylisticAltThreeOnSelector 6
|
|
#define kStylisticAltTwelveOffSelector 25
|
|
#define kStylisticAltTwelveOnSelector 24
|
|
#define kStylisticAltTwentyOffSelector 41
|
|
#define kStylisticAltTwentyOnSelector 40
|
|
#define kStylisticAltTwoOffSelector 5
|
|
#define kStylisticAltTwoOnSelector 4
|
|
#define kStylisticAlternativesType 35
|
|
#define kSwashAlternatesOffSelector 3
|
|
#define kSwashAlternatesOnSelector 2
|
|
#define kThirdWidthTextSelector 3
|
|
#define kTraditionalNamesCharactersSelector 14
|
|
#define kUpperCasePetiteCapsSelector 2
|
|
#define kUpperCaseSmallCapsSelector 1
|
|
#define kUpperCaseType 38
|
|
|
|
/* Table data courtesy of Apple. */
|
|
static const struct feature_mapping_t {
|
|
FourCharCode otFeatureTag;
|
|
uint16_t aatFeatureType;
|
|
uint16_t selectorToEnable;
|
|
uint16_t selectorToDisable;
|
|
} feature_mappings[] = {
|
|
{ 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector },
|
|
{ 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector },
|
|
{ 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector },
|
|
{ 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector },
|
|
{ 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector },
|
|
{ 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector },
|
|
{ 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector },
|
|
{ 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector },
|
|
{ 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 },
|
|
{ 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector },
|
|
{ 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 },
|
|
{ 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
|
|
{ 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
|
|
{ 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, },
|
|
{ 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
|
|
{ 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector },
|
|
{ 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 },
|
|
{ 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 },
|
|
{ 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector },
|
|
{ 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 },
|
|
{ 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 },
|
|
{ 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 },
|
|
{ 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 },
|
|
{ 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector },
|
|
{ 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 },
|
|
{ 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector },
|
|
{ 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 },
|
|
{ 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 },
|
|
{ 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector },
|
|
{ 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 },
|
|
{ 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector },
|
|
{ 'pkna', kTextSpacingType, kProportionalTextSelector, 7 },
|
|
{ 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 },
|
|
{ 'pwid', kTextSpacingType, kProportionalTextSelector, 7 },
|
|
{ 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 },
|
|
{ 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector },
|
|
{ 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector },
|
|
{ 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector },
|
|
{ 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 },
|
|
{ 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector },
|
|
{ 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector },
|
|
{ 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector },
|
|
{ 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector },
|
|
{ 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector },
|
|
{ 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector },
|
|
{ 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector },
|
|
{ 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector },
|
|
{ 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector },
|
|
{ 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector },
|
|
{ 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector },
|
|
{ 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector },
|
|
{ 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector },
|
|
{ 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector },
|
|
{ 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector },
|
|
{ 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector },
|
|
{ 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector },
|
|
{ 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector },
|
|
{ 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector },
|
|
{ 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector },
|
|
{ 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector },
|
|
{ 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector },
|
|
{ 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector },
|
|
{ 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector },
|
|
{ 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 },
|
|
{ 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 },
|
|
{ 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 },
|
|
{ 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 },
|
|
{ 'unic', kLetterCaseType, 14, 15 },
|
|
{ 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 },
|
|
{ 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
|
|
{ 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
|
|
{ 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector },
|
|
{ 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 },
|
|
{ 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
|
|
{ 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector },
|
|
};
|
|
|
|
static int
|
|
_hb_feature_mapping_cmp (const void *key_, const void *entry_)
|
|
{
|
|
unsigned int key = * (unsigned int *) key_;
|
|
const feature_mapping_t * entry = (const feature_mapping_t *) entry_;
|
|
return key < entry->otFeatureTag ? -1 :
|
|
key > entry->otFeatureTag ? 1 :
|
|
0;
|
|
}
|
|
|
|
hb_bool_t
|
|
_hb_coretext_shape (hb_shape_plan_t *shape_plan,
|
|
hb_font_t *font,
|
|
hb_buffer_t *buffer,
|
|
const hb_feature_t *features,
|
|
unsigned int num_features)
|
|
{
|
|
hb_face_t *face = font->face;
|
|
CGFontRef cg_font = (CGFontRef) HB_SHAPER_DATA_GET (face);
|
|
CTFontRef ct_font = (CTFontRef) HB_SHAPER_DATA_GET (font);
|
|
|
|
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;
|
|
|
|
/* Attach marks to their bases, to match the 'ot' shaper.
|
|
* Adapted from hb-ot-shape:hb_form_clusters().
|
|
* Note that this only makes us be closer to the 'ot' shaper,
|
|
* but by no means the same. For example, if there's
|
|
* B1 M1 B2 M2, and B1-B2 form a ligature, M2's cluster will
|
|
* continue pointing to B2 even though B2 was merged into B1's
|
|
* cluster... */
|
|
if (buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES)
|
|
{
|
|
hb_unicode_funcs_t *unicode = buffer->unicode;
|
|
unsigned int count = buffer->len;
|
|
hb_glyph_info_t *info = buffer->info;
|
|
for (unsigned int i = 1; i < count; i++)
|
|
if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (unicode->general_category (info[i].codepoint)))
|
|
buffer->merge_clusters (i - 1, i + 1);
|
|
}
|
|
|
|
hb_auto_array_t<feature_record_t> feature_records;
|
|
hb_auto_array_t<range_record_t> range_records;
|
|
|
|
/*
|
|
* Set up features.
|
|
* (copied + modified from code from hb-uniscribe.cc)
|
|
*/
|
|
if (num_features)
|
|
{
|
|
/* Sort features by start/end events. */
|
|
hb_auto_array_t<feature_event_t> feature_events;
|
|
for (unsigned int i = 0; i < num_features; i++)
|
|
{
|
|
const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag,
|
|
feature_mappings,
|
|
ARRAY_LENGTH (feature_mappings),
|
|
sizeof (feature_mappings[0]),
|
|
_hb_feature_mapping_cmp);
|
|
if (!mapping)
|
|
continue;
|
|
|
|
active_feature_t feature;
|
|
feature.rec.feature = mapping->aatFeatureType;
|
|
feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable;
|
|
feature.order = i;
|
|
|
|
feature_event_t *event;
|
|
|
|
event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = features[i].start;
|
|
event->start = true;
|
|
event->feature = feature;
|
|
|
|
event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = features[i].end;
|
|
event->start = false;
|
|
event->feature = feature;
|
|
}
|
|
feature_events.qsort ();
|
|
/* Add a strategic final event. */
|
|
{
|
|
active_feature_t feature;
|
|
feature.rec.feature = HB_TAG_NONE;
|
|
feature.rec.setting = 0;
|
|
feature.order = num_features + 1;
|
|
|
|
feature_event_t *event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = 0; /* This value does magic. */
|
|
event->start = false;
|
|
event->feature = feature;
|
|
}
|
|
|
|
/* Scan events and save features for each range. */
|
|
hb_auto_array_t<active_feature_t> active_features;
|
|
unsigned int last_index = 0;
|
|
for (unsigned int i = 0; i < feature_events.len; i++)
|
|
{
|
|
feature_event_t *event = &feature_events[i];
|
|
|
|
if (event->index != last_index)
|
|
{
|
|
/* Save a snapshot of active features and the range. */
|
|
range_record_t *range = range_records.push ();
|
|
if (unlikely (!range))
|
|
goto fail_features;
|
|
|
|
if (active_features.len)
|
|
{
|
|
CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
|
|
|
|
/* TODO sort and resolve conflicting features? */
|
|
/* active_features.qsort (); */
|
|
for (unsigned int j = 0; j < active_features.len; j++)
|
|
{
|
|
CFStringRef keys[] = {
|
|
kCTFontFeatureTypeIdentifierKey,
|
|
kCTFontFeatureSelectorIdentifierKey
|
|
};
|
|
CFNumberRef values[] = {
|
|
CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature),
|
|
CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting)
|
|
};
|
|
static_assert ((ARRAY_LENGTH_CONST (keys) == ARRAY_LENGTH_CONST (values)), "");
|
|
CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) keys,
|
|
(const void **) values,
|
|
ARRAY_LENGTH (keys),
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
for (unsigned int i = 0; i < ARRAY_LENGTH (values); i++)
|
|
CFRelease (values[i]);
|
|
|
|
CFArrayAppendValue (features_array, dict);
|
|
CFRelease (dict);
|
|
|
|
}
|
|
|
|
CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) &kCTFontFeatureSettingsAttribute,
|
|
(const void **) &features_array,
|
|
1,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
CFRelease (features_array);
|
|
|
|
CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes);
|
|
CFRelease (attributes);
|
|
|
|
range->font = CTFontCreateCopyWithAttributes (ct_font, 0.0, nullptr, font_desc);
|
|
CFRelease (font_desc);
|
|
}
|
|
else
|
|
{
|
|
range->font = nullptr;
|
|
}
|
|
|
|
range->index_first = last_index;
|
|
range->index_last = event->index - 1;
|
|
|
|
last_index = event->index;
|
|
}
|
|
|
|
if (event->start) {
|
|
active_feature_t *feature = active_features.push ();
|
|
if (unlikely (!feature))
|
|
goto fail_features;
|
|
*feature = event->feature;
|
|
} else {
|
|
active_feature_t *feature = active_features.find (&event->feature);
|
|
if (feature)
|
|
active_features.remove (feature - active_features.array);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fail_features:
|
|
num_features = 0;
|
|
}
|
|
|
|
unsigned int scratch_size;
|
|
hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size);
|
|
|
|
#define ALLOCATE_ARRAY(Type, name, len, on_no_room) \
|
|
Type *name = (Type *) scratch; \
|
|
{ \
|
|
unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
|
|
if (unlikely (_consumed > scratch_size)) \
|
|
{ \
|
|
on_no_room; \
|
|
assert (0); \
|
|
} \
|
|
scratch += _consumed; \
|
|
scratch_size -= _consumed; \
|
|
}
|
|
|
|
ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2, /*nothing*/);
|
|
unsigned int chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++) {
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
if (likely (c <= 0xFFFFu))
|
|
pchars[chars_len++] = c;
|
|
else if (unlikely (c > 0x10FFFFu))
|
|
pchars[chars_len++] = 0xFFFDu;
|
|
else {
|
|
pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
|
|
pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1u << 10) - 1));
|
|
}
|
|
}
|
|
|
|
ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len, /*nothing*/);
|
|
chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++)
|
|
{
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
unsigned int cluster = buffer->info[i].cluster;
|
|
log_clusters[chars_len++] = cluster;
|
|
if (hb_in_range (c, 0x10000u, 0x10FFFFu))
|
|
log_clusters[chars_len++] = cluster; /* Surrogates. */
|
|
}
|
|
|
|
#define FAIL(...) \
|
|
HB_STMT_START { \
|
|
DEBUG_MSG (CORETEXT, nullptr, __VA_ARGS__); \
|
|
ret = false; \
|
|
goto fail; \
|
|
} HB_STMT_END;
|
|
|
|
bool ret = true;
|
|
CFStringRef string_ref = nullptr;
|
|
CTLineRef line = nullptr;
|
|
|
|
if (0)
|
|
{
|
|
resize_and_retry:
|
|
DEBUG_MSG (CORETEXT, buffer, "Buffer resize");
|
|
/* string_ref uses the scratch-buffer for backing store, and line references
|
|
* string_ref (via attr_string). We must release those before resizing buffer. */
|
|
assert (string_ref);
|
|
assert (line);
|
|
CFRelease (string_ref);
|
|
CFRelease (line);
|
|
string_ref = nullptr;
|
|
line = nullptr;
|
|
|
|
/* Get previous start-of-scratch-area, that we use later for readjusting
|
|
* our existing scratch arrays. */
|
|
unsigned int old_scratch_used;
|
|
hb_buffer_t::scratch_buffer_t *old_scratch;
|
|
old_scratch = buffer->get_scratch_buffer (&old_scratch_used);
|
|
old_scratch_used = scratch - old_scratch;
|
|
|
|
if (unlikely (!buffer->ensure (buffer->allocated * 2)))
|
|
FAIL ("Buffer resize failed");
|
|
|
|
/* Adjust scratch, pchars, and log_cluster arrays. This is ugly, but really the
|
|
* cleanest way to do without completely restructuring the rest of this shaper. */
|
|
scratch = buffer->get_scratch_buffer (&scratch_size);
|
|
pchars = reinterpret_cast<UniChar *> (((char *) scratch + ((char *) pchars - (char *) old_scratch)));
|
|
log_clusters = reinterpret_cast<unsigned int *> (((char *) scratch + ((char *) log_clusters - (char *) old_scratch)));
|
|
scratch += old_scratch_used;
|
|
scratch_size -= old_scratch_used;
|
|
}
|
|
{
|
|
string_ref = CFStringCreateWithCharactersNoCopy (nullptr,
|
|
pchars, chars_len,
|
|
kCFAllocatorNull);
|
|
if (unlikely (!string_ref))
|
|
FAIL ("CFStringCreateWithCharactersNoCopy failed");
|
|
|
|
/* Create an attributed string, populate it, and create a line from it, then release attributed string. */
|
|
{
|
|
CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (kCFAllocatorDefault,
|
|
chars_len);
|
|
if (unlikely (!attr_string))
|
|
FAIL ("CFAttributedStringCreateMutable failed");
|
|
CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
{
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTVerticalFormsAttributeName, kCFBooleanTrue);
|
|
}
|
|
|
|
if (buffer->props.language)
|
|
{
|
|
/* What's the iOS equivalent of this check?
|
|
* The symbols was introduced in iOS 7.0.
|
|
* At any rate, our fallback is safe and works fine. */
|
|
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
|
|
# define kCTLanguageAttributeName CFSTR ("NSLanguage")
|
|
#endif
|
|
CFStringRef lang = CFStringCreateWithCStringNoCopy (kCFAllocatorDefault,
|
|
hb_language_to_string (buffer->props.language),
|
|
kCFStringEncodingUTF8,
|
|
kCFAllocatorNull);
|
|
if (unlikely (!lang))
|
|
FAIL ("CFStringCreateWithCStringNoCopy failed");
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTLanguageAttributeName, lang);
|
|
CFRelease (lang);
|
|
}
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTFontAttributeName, ct_font);
|
|
|
|
if (num_features && range_records.len)
|
|
{
|
|
unsigned int start = 0;
|
|
range_record_t *last_range = &range_records[0];
|
|
for (unsigned int k = 0; k < chars_len; k++)
|
|
{
|
|
range_record_t *range = last_range;
|
|
while (log_clusters[k] < range->index_first)
|
|
range--;
|
|
while (log_clusters[k] > range->index_last)
|
|
range++;
|
|
if (range != last_range)
|
|
{
|
|
if (last_range->font)
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start),
|
|
kCTFontAttributeName, last_range->font);
|
|
|
|
start = k;
|
|
}
|
|
|
|
last_range = range;
|
|
}
|
|
if (start != chars_len && last_range->font)
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start),
|
|
kCTFontAttributeName, last_range->font);
|
|
}
|
|
/* Enable/disable kern if requested.
|
|
*
|
|
* Note: once kern is disabled, reenabling it doesn't currently seem to work in CoreText.
|
|
*/
|
|
if (num_features)
|
|
{
|
|
unsigned int zeroint = 0;
|
|
CFNumberRef zero = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &zeroint);
|
|
for (unsigned int i = 0; i < num_features; i++)
|
|
{
|
|
const hb_feature_t &feature = features[i];
|
|
if (feature.tag == HB_TAG('k','e','r','n') &&
|
|
feature.start < chars_len && feature.start < feature.end)
|
|
{
|
|
CFRange feature_range = CFRangeMake (feature.start,
|
|
MIN (feature.end, chars_len) - feature.start);
|
|
if (feature.value)
|
|
CFAttributedStringRemoveAttribute (attr_string, feature_range, kCTKernAttributeName);
|
|
else
|
|
CFAttributedStringSetAttribute (attr_string, feature_range, kCTKernAttributeName, zero);
|
|
}
|
|
}
|
|
CFRelease (zero);
|
|
}
|
|
|
|
int level = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
|
|
CFNumberRef level_number = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &level);
|
|
CFDictionaryRef options = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) &kCTTypesetterOptionForcedEmbeddingLevel,
|
|
(const void **) &level_number,
|
|
1,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
CFRelease (level_number);
|
|
if (unlikely (!options))
|
|
FAIL ("CFDictionaryCreate failed");
|
|
|
|
CTTypesetterRef typesetter = CTTypesetterCreateWithAttributedStringAndOptions (attr_string, options);
|
|
CFRelease (options);
|
|
CFRelease (attr_string);
|
|
if (unlikely (!typesetter))
|
|
FAIL ("CTTypesetterCreateWithAttributedStringAndOptions failed");
|
|
|
|
line = CTTypesetterCreateLine (typesetter, CFRangeMake(0, 0));
|
|
CFRelease (typesetter);
|
|
if (unlikely (!line))
|
|
FAIL ("CTTypesetterCreateLine failed");
|
|
}
|
|
|
|
CFArrayRef glyph_runs = CTLineGetGlyphRuns (line);
|
|
unsigned int num_runs = CFArrayGetCount (glyph_runs);
|
|
DEBUG_MSG (CORETEXT, nullptr, "Num runs: %d", num_runs);
|
|
|
|
buffer->len = 0;
|
|
uint32_t status_and = ~0, status_or = 0;
|
|
double advances_so_far = 0;
|
|
/* For right-to-left runs, CoreText returns the glyphs positioned such that
|
|
* any trailing whitespace is to the left of (0,0). Adjust coordinate system
|
|
* to fix for that. Test with any RTL string with trailing spaces.
|
|
* https://code.google.com/p/chromium/issues/detail?id=469028
|
|
*/
|
|
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
|
|
{
|
|
advances_so_far -= CTLineGetTrailingWhitespaceWidth (line);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
advances_so_far = -advances_so_far;
|
|
}
|
|
|
|
const CFRange range_all = CFRangeMake (0, 0);
|
|
|
|
for (unsigned int i = 0; i < num_runs; i++)
|
|
{
|
|
CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex (glyph_runs, i));
|
|
CTRunStatus run_status = CTRunGetStatus (run);
|
|
status_or |= run_status;
|
|
status_and &= run_status;
|
|
DEBUG_MSG (CORETEXT, run, "CTRunStatus: %x", run_status);
|
|
double run_advance = CTRunGetTypographicBounds (run, range_all, nullptr, nullptr, nullptr);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
run_advance = -run_advance;
|
|
DEBUG_MSG (CORETEXT, run, "Run advance: %g", run_advance);
|
|
|
|
/* CoreText does automatic font fallback (AKA "cascading") for characters
|
|
* not supported by the requested font, and provides no way to turn it off,
|
|
* so we must detect if the returned run uses a font other than the requested
|
|
* one and fill in the buffer with .notdef glyphs instead of random glyph
|
|
* indices from a different font.
|
|
*/
|
|
CFDictionaryRef attributes = CTRunGetAttributes (run);
|
|
CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName));
|
|
if (!CFEqual (run_ct_font, ct_font))
|
|
{
|
|
/* The run doesn't use our main font instance. We have to figure out
|
|
* whether font fallback happened, or this is just CoreText giving us
|
|
* another CTFont using the same underlying CGFont. CoreText seems
|
|
* to do that in a variety of situations, one of which being vertical
|
|
* text, but also perhaps for caching reasons.
|
|
*
|
|
* First, see if it uses any of our subfonts created to set font features...
|
|
*
|
|
* Next, compare the CGFont to the one we used to create our fonts.
|
|
* Even this doesn't work all the time.
|
|
*
|
|
* Finally, we compare PS names, which I don't think are unique...
|
|
*
|
|
* Looks like if we really want to be sure here we have to modify the
|
|
* font to change the name table, similar to what we do in the uniscribe
|
|
* backend.
|
|
*
|
|
* However, even that wouldn't work if we were passed in the CGFont to
|
|
* construct a hb_face to begin with.
|
|
*
|
|
* See: http://github.com/harfbuzz/harfbuzz/pull/36
|
|
*
|
|
* Also see: https://bugs.chromium.org/p/chromium/issues/detail?id=597098
|
|
*/
|
|
bool matched = false;
|
|
for (unsigned int i = 0; i < range_records.len; i++)
|
|
if (range_records[i].font && CFEqual (run_ct_font, range_records[i].font))
|
|
{
|
|
matched = true;
|
|
break;
|
|
}
|
|
if (!matched)
|
|
{
|
|
CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0);
|
|
if (run_cg_font)
|
|
{
|
|
matched = CFEqual (run_cg_font, cg_font);
|
|
CFRelease (run_cg_font);
|
|
}
|
|
}
|
|
if (!matched)
|
|
{
|
|
CFStringRef font_ps_name = CTFontCopyName (ct_font, kCTFontPostScriptNameKey);
|
|
CFStringRef run_ps_name = CTFontCopyName (run_ct_font, kCTFontPostScriptNameKey);
|
|
CFComparisonResult result = CFStringCompare (run_ps_name, font_ps_name, 0);
|
|
CFRelease (run_ps_name);
|
|
CFRelease (font_ps_name);
|
|
if (result == kCFCompareEqualTo)
|
|
matched = true;
|
|
}
|
|
if (!matched)
|
|
{
|
|
CFRange range = CTRunGetStringRange (run);
|
|
DEBUG_MSG (CORETEXT, run, "Run used fallback font: %ld..%ld",
|
|
range.location, range.location + range.length);
|
|
if (!buffer->ensure_inplace (buffer->len + range.length))
|
|
goto resize_and_retry;
|
|
hb_glyph_info_t *info = buffer->info + buffer->len;
|
|
|
|
hb_codepoint_t notdef = 0;
|
|
hb_direction_t dir = buffer->props.direction;
|
|
hb_position_t x_advance, y_advance, x_offset, y_offset;
|
|
hb_font_get_glyph_advance_for_direction (font, notdef, dir, &x_advance, &y_advance);
|
|
hb_font_get_glyph_origin_for_direction (font, notdef, dir, &x_offset, &y_offset);
|
|
hb_position_t advance = x_advance + y_advance;
|
|
x_offset = -x_offset;
|
|
y_offset = -y_offset;
|
|
|
|
unsigned int old_len = buffer->len;
|
|
for (CFIndex j = range.location; j < range.location + range.length; j++)
|
|
{
|
|
UniChar ch = CFStringGetCharacterAtIndex (string_ref, j);
|
|
if (hb_in_range<UniChar> (ch, 0xDC00u, 0xDFFFu) && range.location < j)
|
|
{
|
|
ch = CFStringGetCharacterAtIndex (string_ref, j - 1);
|
|
if (hb_in_range<UniChar> (ch, 0xD800u, 0xDBFFu))
|
|
/* This is the second of a surrogate pair. Don't need .notdef
|
|
* for this one. */
|
|
continue;
|
|
}
|
|
if (buffer->unicode->is_default_ignorable (ch))
|
|
continue;
|
|
|
|
info->codepoint = notdef;
|
|
info->cluster = log_clusters[j];
|
|
|
|
info->mask = advance;
|
|
info->var1.i32 = x_offset;
|
|
info->var2.i32 = y_offset;
|
|
|
|
info++;
|
|
buffer->len++;
|
|
}
|
|
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
|
|
buffer->reverse_range (old_len, buffer->len);
|
|
advances_so_far += run_advance;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
unsigned int num_glyphs = CTRunGetGlyphCount (run);
|
|
if (num_glyphs == 0)
|
|
continue;
|
|
|
|
if (!buffer->ensure_inplace (buffer->len + num_glyphs))
|
|
goto resize_and_retry;
|
|
|
|
hb_glyph_info_t *run_info = buffer->info + buffer->len;
|
|
|
|
/* Testing used to indicate that CTRunGetGlyphsPtr, etc (almost?) always
|
|
* succeed, and so copying data to our own buffer will be rare. Reports
|
|
* have it that this changed in OS X 10.10 Yosemite, and nullptr is returned
|
|
* frequently. At any rate, we can test that codepath by setting USE_PTR
|
|
* to false. */
|
|
|
|
#define USE_PTR true
|
|
|
|
#define SCRATCH_SAVE() \
|
|
unsigned int scratch_size_saved = scratch_size; \
|
|
hb_buffer_t::scratch_buffer_t *scratch_saved = scratch
|
|
|
|
#define SCRATCH_RESTORE() \
|
|
scratch_size = scratch_size_saved; \
|
|
scratch = scratch_saved;
|
|
|
|
{ /* Setup glyphs */
|
|
SCRATCH_SAVE();
|
|
const CGGlyph* glyphs = USE_PTR ? CTRunGetGlyphsPtr (run) : nullptr;
|
|
if (!glyphs) {
|
|
ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetGlyphs (run, range_all, glyph_buf);
|
|
glyphs = glyph_buf;
|
|
}
|
|
const CFIndex* string_indices = USE_PTR ? CTRunGetStringIndicesPtr (run) : nullptr;
|
|
if (!string_indices) {
|
|
ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetStringIndices (run, range_all, index_buf);
|
|
string_indices = index_buf;
|
|
}
|
|
hb_glyph_info_t *info = run_info;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
info->codepoint = glyphs[j];
|
|
info->cluster = log_clusters[string_indices[j]];
|
|
info++;
|
|
}
|
|
SCRATCH_RESTORE();
|
|
}
|
|
{
|
|
/* Setup positions.
|
|
* Note that CoreText does not return advances for glyphs. As such,
|
|
* for all but last glyph, we use the delta position to next glyph as
|
|
* advance (in the advance direction only), and for last glyph we set
|
|
* whatever is needed to make the whole run's advance add up. */
|
|
SCRATCH_SAVE();
|
|
const CGPoint* positions = USE_PTR ? CTRunGetPositionsPtr (run) : nullptr;
|
|
if (!positions) {
|
|
ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetPositions (run, range_all, position_buf);
|
|
positions = position_buf;
|
|
}
|
|
hb_glyph_info_t *info = run_info;
|
|
if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
|
|
{
|
|
hb_position_t x_offset = (positions[0].x - advances_so_far) * x_mult;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
double advance;
|
|
if (likely (j + 1 < num_glyphs))
|
|
advance = positions[j + 1].x - positions[j].x;
|
|
else /* last glyph */
|
|
advance = run_advance - (positions[j].x - positions[0].x);
|
|
info->mask = advance * x_mult;
|
|
info->var1.i32 = x_offset;
|
|
info->var2.i32 = positions[j].y * y_mult;
|
|
info++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
hb_position_t y_offset = (positions[0].y - advances_so_far) * y_mult;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
double advance;
|
|
if (likely (j + 1 < num_glyphs))
|
|
advance = positions[j + 1].y - positions[j].y;
|
|
else /* last glyph */
|
|
advance = run_advance - (positions[j].y - positions[0].y);
|
|
info->mask = advance * y_mult;
|
|
info->var1.i32 = positions[j].x * x_mult;
|
|
info->var2.i32 = y_offset;
|
|
info++;
|
|
}
|
|
}
|
|
SCRATCH_RESTORE();
|
|
advances_so_far += run_advance;
|
|
}
|
|
#undef SCRATCH_RESTORE
|
|
#undef SCRATCH_SAVE
|
|
#undef USE_PTR
|
|
#undef ALLOCATE_ARRAY
|
|
|
|
buffer->len += num_glyphs;
|
|
}
|
|
|
|
/* Mac OS 10.6 doesn't have kCTTypesetterOptionForcedEmbeddingLevel,
|
|
* or if it does, it doesn't resepct it. So we get runs with wrong
|
|
* directions. As such, disable the assert... It wouldn't crash, but
|
|
* cursoring will be off...
|
|
*
|
|
* http://crbug.com/419769
|
|
*/
|
|
if (0)
|
|
{
|
|
/* Make sure all runs had the expected direction. */
|
|
bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
|
|
assert (bool (status_and & kCTRunStatusRightToLeft) == backward);
|
|
assert (bool (status_or & kCTRunStatusRightToLeft) == backward);
|
|
}
|
|
|
|
buffer->clear_positions ();
|
|
|
|
unsigned int count = buffer->len;
|
|
hb_glyph_info_t *info = buffer->info;
|
|
hb_glyph_position_t *pos = buffer->pos;
|
|
if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
pos->x_advance = info->mask;
|
|
pos->x_offset = info->var1.i32;
|
|
pos->y_offset = info->var2.i32;
|
|
|
|
info->mask = HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
|
|
|
info++, pos++;
|
|
}
|
|
else
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
pos->y_advance = info->mask;
|
|
pos->x_offset = info->var1.i32;
|
|
pos->y_offset = info->var2.i32;
|
|
|
|
info->mask = HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
|
|
|
info++, pos++;
|
|
}
|
|
|
|
/* Fix up clusters so that we never return out-of-order indices;
|
|
* if core text has reordered glyphs, we'll merge them to the
|
|
* beginning of the reordered cluster. CoreText is nice enough
|
|
* to tell us whenever it has produced nonmonotonic results...
|
|
* Note that we assume the input clusters were nonmonotonic to
|
|
* begin with.
|
|
*
|
|
* This does *not* mean we'll form the same clusters as Uniscribe
|
|
* or the native OT backend, only that the cluster indices will be
|
|
* monotonic in the output buffer. */
|
|
if (count > 1 && (status_or & kCTRunStatusNonMonotonic))
|
|
{
|
|
hb_glyph_info_t *info = buffer->info;
|
|
if (HB_DIRECTION_IS_FORWARD (buffer->props.direction))
|
|
{
|
|
unsigned int cluster = info[count - 1].cluster;
|
|
for (unsigned int i = count - 1; i > 0; i--)
|
|
{
|
|
cluster = MIN (cluster, info[i - 1].cluster);
|
|
info[i - 1].cluster = cluster;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unsigned int cluster = info[0].cluster;
|
|
for (unsigned int i = 1; i < count; i++)
|
|
{
|
|
cluster = MIN (cluster, info[i].cluster);
|
|
info[i].cluster = cluster;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
buffer->unsafe_to_break_all ();
|
|
|
|
#undef FAIL
|
|
|
|
fail:
|
|
if (string_ref)
|
|
CFRelease (string_ref);
|
|
if (line)
|
|
CFRelease (line);
|
|
|
|
for (unsigned int i = 0; i < range_records.len; i++)
|
|
if (range_records[i].font)
|
|
CFRelease (range_records[i].font);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* AAT shaper
|
|
*/
|
|
|
|
HB_SHAPER_DATA_ENSURE_DEFINE(coretext_aat, face)
|
|
HB_SHAPER_DATA_ENSURE_DEFINE(coretext_aat, font)
|
|
|
|
/*
|
|
* shaper face data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_face_data_t {};
|
|
|
|
hb_coretext_aat_shaper_face_data_t *
|
|
_hb_coretext_aat_shaper_face_data_create (hb_face_t *face)
|
|
{
|
|
static const hb_tag_t tags[] = {HB_CORETEXT_TAG_MORX, HB_CORETEXT_TAG_MORT, HB_CORETEXT_TAG_KERX};
|
|
|
|
for (unsigned int i = 0; i < ARRAY_LENGTH (tags); i++)
|
|
{
|
|
hb_blob_t *blob = face->reference_table (tags[i]);
|
|
if (hb_blob_get_length (blob))
|
|
{
|
|
hb_blob_destroy (blob);
|
|
return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : nullptr;
|
|
}
|
|
hb_blob_destroy (blob);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper font data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_font_data_t {};
|
|
|
|
hb_coretext_aat_shaper_font_data_t *
|
|
_hb_coretext_aat_shaper_font_data_create (hb_font_t *font)
|
|
{
|
|
return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : nullptr;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper shape_plan data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_shape_plan_data_t {};
|
|
|
|
hb_coretext_aat_shaper_shape_plan_data_t *
|
|
_hb_coretext_aat_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
|
|
const hb_feature_t *user_features HB_UNUSED,
|
|
unsigned int num_user_features HB_UNUSED,
|
|
const int *coords HB_UNUSED,
|
|
unsigned int num_coords HB_UNUSED)
|
|
{
|
|
return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper
|
|
*/
|
|
|
|
hb_bool_t
|
|
_hb_coretext_aat_shape (hb_shape_plan_t *shape_plan,
|
|
hb_font_t *font,
|
|
hb_buffer_t *buffer,
|
|
const hb_feature_t *features,
|
|
unsigned int num_features)
|
|
{
|
|
return _hb_coretext_shape (shape_plan, font, buffer, features, num_features);
|
|
}
|