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macfont.c
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macfont.c
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/* Font driver on Mac OS.
Copyright (C) 2009-2013 YAMAMOTO Mitsuharu
This file is part of GNU Emacs Mac port.
GNU Emacs Mac port is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU Emacs Mac port is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs Mac port. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "lisp.h"
#include "dispextern.h"
#include "macterm.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "composite.h"
#include "fontset.h"
#include "font.h"
#include "macfont.h"
#include "macuvs.h"
#include <libkern/OSByteOrder.h>
/* Symbolic types of this font-driver. */
Lisp_Object macfont_driver_type;
#if USE_CORE_TEXT
/* Core Text, for Mac OS X 10.5 and later. */
Lisp_Object Qmac_ct;
static double mac_ctfont_get_advance_width_for_glyph (CTFontRef, CGGlyph);
static CGRect mac_ctfont_get_bounding_rect_for_glyph (CTFontRef, CGGlyph);
static CFArrayRef mac_ctfont_create_available_families (void);
static Boolean mac_ctfont_equal_in_postscript_name (CTFontRef, CTFontRef);
static CTLineRef mac_ctfont_create_line_with_string_and_font (CFStringRef,
CTFontRef);
#endif
#if USE_NS_FONT_DESCRIPTOR
/* Core Text emulation by NSFontDescriptor, for Mac OS X 10.4. */
Lisp_Object Qmac_fd;
#endif
/* The font property key specifying the font design destination. The
value is an unsigned integer code: 0 for WYSIWIG, and 1 for Video
text. (See the documentation of X Logical Font Description
Conventions.) In the Mac font driver, 1 means the screen font is
used for calculating some glyph metrics. You can see the
difference with Monaco 8pt or 9pt, for example. */
static Lisp_Object QCdestination;
/* The boolean-valued font property key specifying the use of
leading. */
static Lisp_Object QCminspace;
struct macfont_metrics;
/* The actual structure for Mac font that can be casted to struct font. */
struct macfont_info
{
struct font font;
FontRef macfont;
CGFontRef cgfont;
ScreenFontRef screen_font;
struct macfont_cache *cache;
struct macfont_metrics **metrics;
short metrics_nrows;
unsigned synthetic_italic_p : 1;
unsigned synthetic_bold_p : 1;
unsigned spacing : 2;
unsigned antialias : 2;
unsigned color_bitmap_p : 1;
};
/* Values for the `spacing' member in `struct macfont_info'. */
enum
{
MACFONT_SPACING_PROPORTIONAL,
MACFONT_SPACING_MONO,
MACFONT_SPACING_SYNTHETIC_MONO,
};
/* Values for the `antialias' member in `struct macfont_info'. */
enum
{
MACFONT_ANTIALIAS_DEFAULT,
MACFONT_ANTIALIAS_OFF,
MACFONT_ANTIALIAS_ON,
};
enum {FONT_SLANT_SYNTHETIC_ITALIC = 200}; /* FC_SLANT_ITALIC + 100 */
enum {FONT_WEIGHT_SYNTHETIC_BOLD = 200}; /* FC_WEIGHT_BOLD */
enum {FONT_SPACING_SYNTHETIC_MONO = FONT_SPACING_MONO};
static const CGAffineTransform synthetic_italic_atfm = {1, 0, 0.25, 1, 0, 0};
static const CGFloat synthetic_bold_factor = 0.024;
static Boolean cfnumber_get_font_symbolic_traits_value (CFNumberRef,
FontSymbolicTraits *);
static void macfont_store_descriptor_attributes (FontDescriptorRef,
Lisp_Object);
static Lisp_Object macfont_descriptor_entity (FontDescriptorRef,
Lisp_Object,
FontSymbolicTraits);
static CFStringRef macfont_create_family_with_symbol (Lisp_Object);
static int macfont_glyph_extents (struct font *, CGGlyph,
struct font_metrics *, CGFloat *, int);
static CFMutableDictionaryRef macfont_create_attributes_with_spec (Lisp_Object);
static Boolean macfont_supports_charset_and_languages_p (FontDescriptorRef,
CFCharacterSetRef,
Lisp_Object,
CFArrayRef);
static CFIndex macfont_closest_traits_index (CFArrayRef,
FontSymbolicTraits);
static CFDataRef mac_font_copy_uvs_table (FontRef);
static void mac_font_get_glyphs_for_variants (CFDataRef, UTF32Char,
const UTF32Char [],
CGGlyph [], CFIndex);
/* Mac font driver. */
static struct
{
/* registry name */
const char *name;
/* characters to distinguish the charset from the others */
int uniquifier[6];
/* additional constraint by language */
CFStringRef lang;
/* set on demand */
CFCharacterSetRef cf_charset;
CFStringRef cf_charset_string;
} cf_charset_table[] =
{ { "iso8859-1", { 0x00A0, 0x00A1, 0x00B4, 0x00BC, 0x00D0 } },
{ "iso8859-2", { 0x00A0, 0x010E }},
{ "iso8859-3", { 0x00A0, 0x0108 }},
{ "iso8859-4", { 0x00A0, 0x00AF, 0x0128, 0x0156, 0x02C7 }},
{ "iso8859-5", { 0x00A0, 0x0401 }},
{ "iso8859-6", { 0x00A0, 0x060C }},
{ "iso8859-7", { 0x00A0, 0x0384 }},
{ "iso8859-8", { 0x00A0, 0x05D0 }},
{ "iso8859-9", { 0x00A0, 0x00A1, 0x00BC, 0x011E }},
{ "iso8859-10", { 0x00A0, 0x00D0, 0x0128, 0x2015 }},
{ "iso8859-11", { 0x00A0, 0x0E01 }},
{ "iso8859-13", { 0x00A0, 0x201C }},
{ "iso8859-14", { 0x00A0, 0x0174 }},
{ "iso8859-15", { 0x00A0, 0x00A1, 0x00D0, 0x0152 }},
{ "iso8859-16", { 0x00A0, 0x0218}},
{ "gb2312.1980-0", { 0x4E13 }, CFSTR ("zh-Hans")},
{ "big5-0", { /* 0xF6B1 in ftfont.c */ 0xF7E5 }, CFSTR ("zh-Hant") },
{ "jisx0208.1983-0", { 0x4E55 }, CFSTR ("ja")},
{ "ksc5601.1987-0", { 0xAC00 }, CFSTR ("ko")},
{ "cns11643.1992-1", { 0xFE32 }, CFSTR ("zh-Hant")},
{ "cns11643.1992-2", { 0x4E33, 0x7934 }},
{ "cns11643.1992-3", { 0x201A9 }},
{ "cns11643.1992-4", { 0x20057 }},
{ "cns11643.1992-5", { 0x20000 }},
{ "cns11643.1992-6", { 0x20003 }},
{ "cns11643.1992-7", { 0x20055 }},
{ "gbk-0", { 0x4E06 }, CFSTR ("zh-Hans")},
{ "jisx0212.1990-0", { 0x4E44 }},
{ "jisx0213.2000-1", { 0xFA10 }, CFSTR ("ja")},
{ "jisx0213.2000-2", { 0xFA49 }},
{ "jisx0213.2004-1", { 0x20B9F }},
{ "viscii1.1-1", { 0x1EA0, 0x1EAE, 0x1ED2 }, CFSTR ("vi")},
{ "tis620.2529-1", { 0x0E01 }, CFSTR ("th")},
{ "windows-1251", { 0x0401, 0x0490 }, CFSTR ("ru")},
{ "koi8-r", { 0x0401, 0x2219 }, CFSTR ("ru")},
{ "mulelao-1", { 0x0E81 }, CFSTR ("lo")},
{ "unicode-sip", { 0x20000 }},
{ NULL }
};
static CGFloat macfont_antialias_threshold;
void
macfont_update_antialias_threshold (void)
{
int threshold;
Boolean valid_p;
threshold =
CFPreferencesGetAppIntegerValue (CFSTR ("AppleAntiAliasingThreshold"),
kCFPreferencesCurrentApplication,
&valid_p);
if (valid_p)
macfont_antialias_threshold = threshold;
}
static inline Lisp_Object
macfont_intern_prop_cfstring (CFStringRef cfstring)
{
Lisp_Object string = cfstring_to_lisp_nodecode (cfstring);
return font_intern_prop (SSDATA (string), SBYTES (string), 1);
}
static inline CFIndex
macfont_store_utf32char_to_unichars (UTF32Char c, UniChar *unichars)
{
if (c < 0x10000)
{
unichars[0] = c;
return 1;
}
else
{
c -= 0x10000;
unichars[0] = (c >> 10) + 0xD800;
unichars[1] = (c & 0x3FF) + 0xDC00;
return 2;
}
}
static Boolean
cfnumber_get_font_symbolic_traits_value (CFNumberRef number,
FontSymbolicTraits *sym_traits)
{
SInt64 sint64_value;
/* Getting symbolic traits with kCFNumberSInt32Type is lossy on Mac
OS 10.6 when the value is greater than or equal to 1 << 31. */
if (CFNumberGetValue (number, kCFNumberSInt64Type, &sint64_value))
{
*sym_traits = (FontSymbolicTraits) sint64_value;
return true;
}
return false;
}
static void
macfont_store_descriptor_attributes (FontDescriptorRef desc,
Lisp_Object spec_or_entity)
{
CFStringRef str;
CFDictionaryRef dict;
CFNumberRef num;
CGFloat floatval;
str = mac_font_descriptor_copy_attribute (desc,
MAC_FONT_FAMILY_NAME_ATTRIBUTE);
if (str)
{
ASET (spec_or_entity, FONT_FAMILY_INDEX,
macfont_intern_prop_cfstring (str));
CFRelease (str);
}
dict = mac_font_descriptor_copy_attribute (desc, MAC_FONT_TRAITS_ATTRIBUTE);
if (dict)
{
struct {
enum font_property_index index;
CFStringRef trait;
CGPoint points[6];
} numeric_traits[] =
{{FONT_WEIGHT_INDEX, MAC_FONT_WEIGHT_TRAIT,
{{-0.4, 50}, /* light */
{-0.24, 87.5}, /* (semi-light + normal) / 2 */
{0, 100}, /* normal */
{0.24, 140}, /* (semi-bold + normal) / 2 */
{0.4, 200}, /* bold */
{CGFLOAT_MAX, CGFLOAT_MAX}}},
{FONT_SLANT_INDEX, MAC_FONT_SLANT_TRAIT,
{{0, 100}, {0.1, 200}, {CGFLOAT_MAX, CGFLOAT_MAX}}},
{FONT_WIDTH_INDEX, MAC_FONT_WIDTH_TRAIT,
{{0, 100}, {1, 200}, {CGFLOAT_MAX, CGFLOAT_MAX}}}};
int i;
for (i = 0; i < sizeof (numeric_traits) / sizeof (numeric_traits[0]); i++)
{
num = CFDictionaryGetValue (dict, numeric_traits[i].trait);
if (num && CFNumberGetValue (num, kCFNumberCGFloatType, &floatval))
{
CGPoint *point = numeric_traits[i].points;
while (point->x < floatval)
point++;
if (point == numeric_traits[i].points)
point++;
else if (point->x == CGFLOAT_MAX)
point--;
floatval = (point - 1)->y + ((floatval - (point - 1)->x)
* ((point->y - (point - 1)->y)
/ (point->x - (point - 1)->x)));
FONT_SET_STYLE (spec_or_entity, numeric_traits[i].index,
make_number (lround (floatval)));
}
}
num = CFDictionaryGetValue (dict, MAC_FONT_SYMBOLIC_TRAIT);
if (num)
{
FontSymbolicTraits sym_traits;
int spacing;
cfnumber_get_font_symbolic_traits_value (num, &sym_traits);
spacing = (sym_traits & MAC_FONT_TRAIT_MONO_SPACE
? FONT_SPACING_MONO : FONT_SPACING_PROPORTIONAL);
ASET (spec_or_entity, FONT_SPACING_INDEX, make_number (spacing));
}
CFRelease (dict);
}
num = mac_font_descriptor_copy_attribute (desc, MAC_FONT_SIZE_ATTRIBUTE);
if (num && CFNumberGetValue (num, kCFNumberCGFloatType, &floatval))
ASET (spec_or_entity, FONT_SIZE_INDEX, make_number (floatval));
else
ASET (spec_or_entity, FONT_SIZE_INDEX, make_number (0));
if (num)
CFRelease (num);
}
static Lisp_Object
macfont_descriptor_entity (FontDescriptorRef desc, Lisp_Object extra,
FontSymbolicTraits synth_sym_traits)
{
Lisp_Object entity;
CFDictionaryRef dict;
FontSymbolicTraits sym_traits = 0;
CFStringRef name;
entity = font_make_entity ();
ASET (entity, FONT_TYPE_INDEX, macfont_driver.type);
ASET (entity, FONT_REGISTRY_INDEX, Qiso10646_1);
macfont_store_descriptor_attributes (desc, entity);
dict = mac_font_descriptor_copy_attribute (desc, MAC_FONT_TRAITS_ATTRIBUTE);
if (dict)
{
CFNumberRef num = CFDictionaryGetValue (dict, MAC_FONT_SYMBOLIC_TRAIT);
if (num)
cfnumber_get_font_symbolic_traits_value (num, &sym_traits);
CFRelease (dict);
}
if (EQ (AREF (entity, FONT_SIZE_INDEX), make_number (0)))
ASET (entity, FONT_AVGWIDTH_INDEX, make_number (0));
ASET (entity, FONT_EXTRA_INDEX, Fcopy_sequence (extra));
name = mac_font_descriptor_copy_attribute (desc, MAC_FONT_NAME_ATTRIBUTE);
font_put_extra (entity, QCfont_entity,
make_save_value ((void *) name, sym_traits));
if (synth_sym_traits & MAC_FONT_TRAIT_ITALIC)
FONT_SET_STYLE (entity, FONT_SLANT_INDEX,
make_number (FONT_SLANT_SYNTHETIC_ITALIC));
if (synth_sym_traits & MAC_FONT_TRAIT_BOLD)
FONT_SET_STYLE (entity, FONT_WEIGHT_INDEX,
make_number (FONT_WEIGHT_SYNTHETIC_BOLD));
if (synth_sym_traits & MAC_FONT_TRAIT_MONO_SPACE)
ASET (entity, FONT_SPACING_INDEX,
make_number (FONT_SPACING_SYNTHETIC_MONO));
return entity;
}
static CFStringRef
macfont_create_family_with_symbol (Lisp_Object symbol)
{
static CFArrayRef families = NULL;
CFStringRef result = NULL, family_name;
int using_cache_p = 1;
CFComparatorFunction family_name_comparator;
family_name = cfstring_create_with_string_noencode (SYMBOL_NAME (symbol));
if (family_name == NULL)
return NULL;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
if (CTFontManagerCompareFontFamilyNames != NULL)
#endif
{
family_name_comparator = CTFontManagerCompareFontFamilyNames;
}
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
else /* CTFontManagerCompareFontFamilyNames == NULL */
#endif
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 1060 */
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
{
family_name_comparator = mac_font_family_compare;
}
#endif
if ((*family_name_comparator) (family_name, CFSTR ("LastResort"), NULL)
== kCFCompareEqualTo)
result = CFSTR ("LastResort");
else
while (1)
{
CFIndex i, count;
if (families == NULL)
{
families = mac_font_create_available_families ();
using_cache_p = 0;
if (families == NULL)
break;
}
count = CFArrayGetCount (families);
i = CFArrayBSearchValues (families, CFRangeMake (0, count),
(const void *) family_name,
family_name_comparator, NULL);
if (i < count)
{
CFStringRef name = CFArrayGetValueAtIndex (families, i);
if ((*family_name_comparator) (name, family_name, NULL)
== kCFCompareEqualTo)
result = CFRetain (name);
}
if (result || !using_cache_p)
break;
else
{
CFRelease (families);
families = NULL;
}
}
CFRelease (family_name);
return result;
}
#define WIDTH_FRAC_BITS (4)
#define WIDTH_FRAC_SCALE (2 * ((1 << (WIDTH_FRAC_BITS - 1)) - 1))
struct macfont_metrics
{
unsigned char lbearing_low, rbearing_low;
signed lbearing_high : 4, rbearing_high : 4;
unsigned char ascent_low, descent_low;
signed ascent_high : 4, descent_high : 4;
/* These two members are used for fixed-point representation of
glyph width. The `width_int' member is an integer that is
closest to the width. The `width_frac' member is the fractional
adjustment representing a value in [-.5, .5], multiplied by
WIDTH_FRAC_SCALE. For synthetic monospace fonts, they represent
the advance delta for centering instead of the glyph width. */
signed width_frac : WIDTH_FRAC_BITS, width_int : 16 - WIDTH_FRAC_BITS;
};
#define METRICS_VALUE(metrics, member) \
(((metrics)->member##_high << 8) | (metrics)->member##_low)
#define METRICS_SET_VALUE(metrics, member, value) \
do {short tmp = (value); (metrics)->member##_low = tmp & 0xff; \
(metrics)->member##_high = tmp >> 8;} while (0)
enum metrics_status
{
METRICS_INVALID = -1, /* metrics entry is invalid */
METRICS_WIDTH_VALID = -2 /* width is valid but others are invalid */
};
#define METRICS_STATUS(metrics) \
(METRICS_VALUE (metrics, ascent) + METRICS_VALUE (metrics, descent))
#define METRICS_SET_STATUS(metrics, status) \
do {METRICS_SET_VALUE (metrics, ascent, 0); \
METRICS_SET_VALUE (metrics, descent, status);} while (0)
#define METRICS_NCOLS_PER_ROW (128)
#define LCD_FONT_SMOOTHING_LEFT_MARGIN (0.396)
#define LCD_FONT_SMOOTHING_RIGHT_MARGIN (0.396)
static int
macfont_glyph_extents (struct font *font, CGGlyph glyph,
struct font_metrics *metrics, CGFloat *advance_delta,
int force_integral_p)
{
struct macfont_info *macfont_info = (struct macfont_info *) font;
FontRef macfont = macfont_info->macfont;
int row, col;
struct macfont_metrics *cache;
int width;
row = glyph / METRICS_NCOLS_PER_ROW;
col = glyph % METRICS_NCOLS_PER_ROW;
if (row >= macfont_info->metrics_nrows)
{
macfont_info->metrics =
xrealloc (macfont_info->metrics,
sizeof (struct macfont_metrics *) * (row + 1));
memset (macfont_info->metrics + macfont_info->metrics_nrows, 0,
(sizeof (struct macfont_metrics *)
* (row + 1 - macfont_info->metrics_nrows)));
macfont_info->metrics_nrows = row + 1;
}
if (macfont_info->metrics[row] == NULL)
{
struct macfont_metrics *new;
int i;
new = xmalloc (sizeof (struct macfont_metrics) * METRICS_NCOLS_PER_ROW);
for (i = 0; i < METRICS_NCOLS_PER_ROW; i++)
METRICS_SET_STATUS (new + i, METRICS_INVALID);
macfont_info->metrics[row] = new;
}
cache = macfont_info->metrics[row] + col;
if (METRICS_STATUS (cache) == METRICS_INVALID)
{
CGFloat fwidth;
if (macfont_info->screen_font)
fwidth = mac_screen_font_get_advance_width_for_glyph (macfont_info->screen_font, glyph);
else
fwidth = mac_font_get_advance_width_for_glyph (macfont, glyph);
/* For synthetic mono fonts, cache->width_{int,frac} holds the
advance delta value. */
if (macfont_info->spacing == MACFONT_SPACING_SYNTHETIC_MONO)
fwidth = (font->pixel_size - fwidth) / 2;
cache->width_int = lround (fwidth);
cache->width_frac = lround ((fwidth - cache->width_int)
* WIDTH_FRAC_SCALE);
METRICS_SET_STATUS (cache, METRICS_WIDTH_VALID);
}
if (macfont_info->spacing == MACFONT_SPACING_SYNTHETIC_MONO)
width = font->pixel_size;
else
width = cache->width_int;
if (metrics)
{
if (METRICS_STATUS (cache) == METRICS_WIDTH_VALID)
{
CGRect bounds = mac_font_get_bounding_rect_for_glyph (macfont, glyph);
if (macfont_info->synthetic_italic_p)
{
/* We assume the members a, b, c, and d in
synthetic_italic_atfm are non-negative. */
bounds.origin =
CGPointApplyAffineTransform (bounds.origin,
synthetic_italic_atfm);
bounds.size =
CGSizeApplyAffineTransform (bounds.size, synthetic_italic_atfm);
}
if (macfont_info->synthetic_bold_p)
{
CGFloat d =
- synthetic_bold_factor * mac_font_get_size (macfont) / 2;
bounds = CGRectInset (bounds, d, d);
}
switch (macfont_info->spacing)
{
case MACFONT_SPACING_PROPORTIONAL:
bounds.origin.x += - (cache->width_frac
/ (CGFloat) (WIDTH_FRAC_SCALE * 2));
break;
case MACFONT_SPACING_MONO:
break;
case MACFONT_SPACING_SYNTHETIC_MONO:
bounds.origin.x += (cache->width_int
+ (cache->width_frac
/ (CGFloat) WIDTH_FRAC_SCALE));
break;
}
if (bounds.size.width > 0)
{
bounds.origin.x -= LCD_FONT_SMOOTHING_LEFT_MARGIN;
bounds.size.width += (LCD_FONT_SMOOTHING_LEFT_MARGIN
+ LCD_FONT_SMOOTHING_RIGHT_MARGIN);
}
bounds = CGRectIntegral (bounds);
METRICS_SET_VALUE (cache, lbearing, CGRectGetMinX (bounds));
METRICS_SET_VALUE (cache, rbearing, CGRectGetMaxX (bounds));
METRICS_SET_VALUE (cache, ascent, CGRectGetMaxY (bounds));
METRICS_SET_VALUE (cache, descent, -CGRectGetMinY (bounds));
}
metrics->lbearing = METRICS_VALUE (cache, lbearing);
metrics->rbearing = METRICS_VALUE (cache, rbearing);
metrics->width = width;
metrics->ascent = METRICS_VALUE (cache, ascent);
metrics->descent = METRICS_VALUE (cache, descent);
}
if (advance_delta)
{
switch (macfont_info->spacing)
{
case MACFONT_SPACING_PROPORTIONAL:
*advance_delta = (force_integral_p ? 0
: - (cache->width_frac
/ (CGFloat) (WIDTH_FRAC_SCALE * 2)));
break;
case MACFONT_SPACING_MONO:
*advance_delta = 0;
break;
case MACFONT_SPACING_SYNTHETIC_MONO:
*advance_delta = (force_integral_p ? cache->width_int
: (cache->width_int
+ (cache->width_frac
/ (CGFloat) WIDTH_FRAC_SCALE)));
break;
}
}
return width;
}
static CFMutableDictionaryRef macfont_cache_dictionary;
/* Threshold used in row_nkeys_or_perm. This must be less than or
equal to the number of rows that are invalid as BMP (i.e., from
U+D800 to U+DFFF). */
#define ROW_PERM_OFFSET (8)
/* The number of glyphs that can be stored in a value for a single
entry of CFDictionary. */
#define NGLYPHS_IN_VALUE (sizeof (void *) / sizeof (CGGlyph))
struct macfont_cache
{
int reference_count;
CFCharacterSetRef cf_charset;
struct {
/* The cached glyph for a BMP character c is stored in
matrix[row_nkeys_or_perm[c / 256] - ROW_PERM_OFFSET][c % 256]
if row_nkeys_or_perm[c / 256] >= ROW_PERM_OFFSET. */
unsigned char row_nkeys_or_perm[256];
CGGlyph **matrix;
/* Number of rows for which the BMP cache is allocated so far.
I.e., matrix[0] ... matrix[nrows - 1] are non-NULL. */
int nrows;
/* The cached glyph for a character c is stored as the (c %
NGLYPHS_IN_VALUE)-th CGGlyph block of a value for the key (c /
NGLYPHS_IN_VALUE). However, the glyph for a BMP characrer c is
not stored here if row_nkeys_or_perm[c / 256] >=
ROW_PERM_OFFSET. */
CFMutableDictionaryRef dictionary;
} glyph;
struct {
/* UVS (Unicode Variation Sequence) subtable data, which is of
type CFDataRef if available. NULL means it is not initialized
yet. kCFNull means the subtable is not found and there is no
suitable fallback table for this font. */
CFTypeRef table;
/* Character collection specifying the destination of the mapping
provided by `table' above. If `table' is obtained from the UVS
subtable in the font cmap table, then the value of this member
should be MAC_CHARACTER_COLLECTION_IDENTITY_MAPPING. */
CharacterCollection collection;
} uvs;
};
static struct macfont_cache *macfont_lookup_cache (CFStringRef);
static struct macfont_cache *macfont_retain_cache (struct macfont_cache *);
static void macfont_release_cache (struct macfont_cache *);
static CFCharacterSetRef macfont_get_cf_charset (struct font *);
static CFCharacterSetRef macfont_get_cf_charset_for_name (CFStringRef);
static CGGlyph macfont_get_glyph_for_character (struct font *, UTF32Char);
static CGGlyph macfont_get_glyph_for_cid (struct font *font,
CharacterCollection, CGFontIndex);
static CFDataRef macfont_get_uvs_table (struct font *, CharacterCollection *);
static struct macfont_cache *
macfont_lookup_cache (CFStringRef key)
{
struct macfont_cache *cache;
if (macfont_cache_dictionary == NULL)
{
macfont_cache_dictionary =
CFDictionaryCreateMutable (NULL, 0,
&kCFTypeDictionaryKeyCallBacks, NULL);
cache = NULL;
}
else
cache = ((struct macfont_cache *)
CFDictionaryGetValue (macfont_cache_dictionary, key));
if (cache == NULL)
{
FontRef macfont = mac_font_create_with_name (key, 0);
if (macfont)
{
cache = xmalloc (sizeof (struct macfont_cache));
memset (cache, 0, sizeof (struct macfont_cache));
/* Treat the LastResort font as if it contained glyphs for
all characters. This may look too rough, but neither
CTFontCopyCharacterSet nor -[NSFont coveredCharacterSet]
for this font is correct for non-BMP characters on Mac OS
X 10.5, anyway. */
if (CFStringCompare (key, CFSTR ("LastResort"), 0)
== kCFCompareEqualTo)
{
CFRange range = CFRangeMake (0, MAX_UNICODE_CHAR + 1);
cache->cf_charset =
CFCharacterSetCreateWithCharactersInRange (NULL, range);
}
if (cache->cf_charset == NULL)
cache->cf_charset = mac_font_copy_character_set (macfont);
CFDictionaryAddValue (macfont_cache_dictionary, key,
(const void *) cache);
CFRelease (macfont);
}
}
return cache;
}
static struct macfont_cache *
macfont_retain_cache (struct macfont_cache *cache)
{
cache->reference_count++;
return cache;
}
static void
macfont_release_cache (struct macfont_cache *cache)
{
if (--cache->reference_count == 0)
{
int i;
for (i = 0; i < cache->glyph.nrows; i++)
xfree (cache->glyph.matrix[i]);
xfree (cache->glyph.matrix);
if (cache->glyph.dictionary)
CFRelease (cache->glyph.dictionary);
memset (&cache->glyph, 0, sizeof (cache->glyph));
if (cache->uvs.table)
CFRelease (cache->uvs.table);
memset (&cache->uvs, 0, sizeof (cache->uvs));
}
}
static CFCharacterSetRef
macfont_get_cf_charset (struct font *font)
{
struct macfont_info *macfont_info = (struct macfont_info *) font;
return macfont_info->cache->cf_charset;
}
static CFCharacterSetRef
macfont_get_cf_charset_for_name (CFStringRef name)
{
struct macfont_cache *cache = macfont_lookup_cache (name);
return cache->cf_charset;
}
static CGGlyph
macfont_get_glyph_for_character (struct font *font, UTF32Char c)
{
struct macfont_info *macfont_info = (struct macfont_info *) font;
FontRef macfont = macfont_info->macfont;
struct macfont_cache *cache = macfont_info->cache;
if (c < 0xD800 || (c > 0xDFFF && c < 0x10000))
{
int row = c / 256;
int nkeys_or_perm = cache->glyph.row_nkeys_or_perm[row];
if (nkeys_or_perm < ROW_PERM_OFFSET)
{
UniChar unichars[256], ch;
CGGlyph *glyphs;
int i, len;
int nrows;
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
dispatch_queue_t queue;
dispatch_group_t group = NULL;
#else
int nkeys;
#endif
if (row != 0)
{
CFMutableDictionaryRef dictionary;
uintptr_t key, value;
int nshifts;
CGGlyph glyph;
if (cache->glyph.dictionary == NULL)
cache->glyph.dictionary =
CFDictionaryCreateMutable (NULL, 0, NULL, NULL);
dictionary = cache->glyph.dictionary;
key = c / NGLYPHS_IN_VALUE;
nshifts = ((c % NGLYPHS_IN_VALUE) * sizeof (CGGlyph) * 8);
value = ((uintptr_t)
CFDictionaryGetValue (dictionary, (const void *) key));
glyph = (value >> nshifts);
if (glyph)
return glyph;
if (nkeys_or_perm + 1 != ROW_PERM_OFFSET)
{
ch = c;
if (!mac_font_get_glyphs_for_characters (macfont, &ch,
&glyph, 1)
|| glyph == 0)
glyph = kCGFontIndexInvalid;
if (value == 0)
cache->glyph.row_nkeys_or_perm[row] = nkeys_or_perm + 1;
value |= ((uintptr_t) glyph << nshifts);
CFDictionarySetValue (dictionary, (const void *) key,
(const void *) value);
return glyph;
}
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
queue =
dispatch_get_global_queue (DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
group = dispatch_group_create ();
dispatch_group_async (group, queue, ^{
int nkeys;
uintptr_t key;
#endif
nkeys = nkeys_or_perm;
for (key = row * (256 / NGLYPHS_IN_VALUE); ; key++)
if (CFDictionaryContainsKey (dictionary,
(const void *) key))
{
CFDictionaryRemoveValue (dictionary,
(const void *) key);
if (--nkeys == 0)
break;
}
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
});
#endif
}
len = 0;
for (i = 0; i < 256; i++)
{
ch = row * 256 + i;
if (CFCharacterSetIsLongCharacterMember (cache->cf_charset, ch))
unichars[len++] = ch;
}
glyphs = xmalloc (sizeof (CGGlyph) * 256);
if (len > 0)
{
mac_font_get_glyphs_for_characters (macfont, unichars,
glyphs, len);
while (i > len)
{
int next = unichars[len - 1] % 256;
while (--i > next)
glyphs[i] = kCGFontIndexInvalid;
len--;
glyphs[i] = glyphs[len];
if (len == 0)
break;
}
}
if (i > len)
while (i-- > 0)
glyphs[i] = kCGFontIndexInvalid;
nrows = cache->glyph.nrows;
nkeys_or_perm = nrows + ROW_PERM_OFFSET;
cache->glyph.row_nkeys_or_perm[row] = nkeys_or_perm;
nrows++;
cache->glyph.matrix = xrealloc (cache->glyph.matrix,
sizeof (CGGlyph *) * nrows);
cache->glyph.matrix[nrows - 1] = glyphs;
cache->glyph.nrows = nrows;
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
if (group)
{
dispatch_group_wait (group, DISPATCH_TIME_FOREVER);
dispatch_release (group);
}
#endif
}
return cache->glyph.matrix[nkeys_or_perm - ROW_PERM_OFFSET][c % 256];
}
else
{
uintptr_t key, value;
int nshifts;
CGGlyph glyph;
if (cache->glyph.dictionary == NULL)
cache->glyph.dictionary =
CFDictionaryCreateMutable (NULL, 0, NULL, NULL);
key = c / NGLYPHS_IN_VALUE;
nshifts = ((c % NGLYPHS_IN_VALUE) * sizeof (CGGlyph) * 8);
value = (uintptr_t) CFDictionaryGetValue (cache->glyph.dictionary,
(const void *) key);
glyph = (value >> nshifts);
if (glyph == 0)
{
UniChar unichars[2];
CGGlyph glyphs[2];
CFIndex count = macfont_store_utf32char_to_unichars (c, unichars);
if (mac_font_get_glyphs_for_characters (macfont, unichars, glyphs,
count))
glyph = glyphs[0];
if (glyph == 0)
glyph = kCGFontIndexInvalid;
value |= ((uintptr_t) glyph << nshifts);
CFDictionarySetValue (cache->glyph.dictionary,
(const void *) key, (const void *) value);
}
return glyph;
}
}
static CGGlyph
macfont_get_glyph_for_cid (struct font *font, CharacterCollection collection,
CGFontIndex cid)
{
struct macfont_info *macfont_info = (struct macfont_info *) font;
FontRef macfont = macfont_info->macfont;
/* Cache it? */
return mac_font_get_glyph_for_cid (macfont, collection, cid);
}
static CFDataRef
macfont_get_uvs_table (struct font *font, CharacterCollection *collection)
{
struct macfont_info *macfont_info = (struct macfont_info *) font;
FontRef macfont = macfont_info->macfont;
struct macfont_cache *cache = macfont_info->cache;
CFDataRef result = NULL;
if (cache->uvs.table == NULL)
{
CFDataRef uvs_table = mac_font_copy_uvs_table (macfont);
CharacterCollection uvs_collection =
MAC_CHARACTER_COLLECTION_IDENTITY_MAPPING;
if (uvs_table == NULL
&& mac_font_get_glyph_for_cid (macfont,
MAC_CHARACTER_COLLECTION_ADOBE_JAPAN1,
6480) != kCGFontIndexInvalid)
{
/* If the glyph for U+4E55 is accessible via its CID 6480,
then we use the Adobe-Japan1 UVS table, which maps a
variation sequence to a CID, as a fallback. */
static CFDataRef mac_uvs_table_adobe_japan1 = NULL;
if (mac_uvs_table_adobe_japan1 == NULL)
mac_uvs_table_adobe_japan1 =
CFDataCreateWithBytesNoCopy (NULL,
mac_uvs_table_adobe_japan1_bytes,
sizeof (mac_uvs_table_adobe_japan1_bytes),
kCFAllocatorNull);
if (mac_uvs_table_adobe_japan1)
{
uvs_table = CFRetain (mac_uvs_table_adobe_japan1);
uvs_collection = MAC_CHARACTER_COLLECTION_ADOBE_JAPAN1;
}
}
if (uvs_table == NULL)
cache->uvs.table = kCFNull;
else
cache->uvs.table = uvs_table;
cache->uvs.collection = uvs_collection;
}
if (cache->uvs.table != kCFNull)