1 /* Font back-end driver for the NeXT/Open/GNUstep and MacOSX window system.
3 Copyright (C) 2006-2013 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
20 Author: Adrian Robert (arobert@cogsci.ucsd.edu)
23 /* This should be the first include, as it may set up #defines affecting
24 interpretation of even the system includes. */
28 #include "dispextern.h"
29 #include "composite.h"
30 #include "blockinput.h"
37 #include "character.h"
41 /* TODO: Drop once we can assume gnustep-gui 0.17.1. */
42 #ifdef NS_IMPL_GNUSTEP
43 #import <AppKit/NSFontDescriptor.h>
46 #define NSFONT_TRACE 0
48 extern Lisp_Object Qns;
49 extern Lisp_Object Qnormal, Qbold, Qitalic;
50 static Lisp_Object Qapple, Qroman, Qmedium;
51 static Lisp_Object Qcondensed, Qexpanded;
52 extern Lisp_Object Qappend;
53 extern float ns_antialias_threshold;
54 extern int ns_tmp_flags;
55 extern struct nsfont_info *ns_tmp_font;
58 /* font glyph and metrics caching functions, implemented at end */
59 static void ns_uni_to_glyphs (struct nsfont_info *font_info,
61 static void ns_glyph_metrics (struct nsfont_info *font_info,
65 /* ==========================================================================
69 ========================================================================== */
72 /* Replace spaces w/another character so emacs core font parsing routines
75 ns_escape_name (char *name)
77 int i =0, len =strlen (name);
84 /* Reconstruct spaces in a font family name passed through emacs. */
86 ns_unescape_name (char *name)
88 int i =0, len =strlen (name);
95 /* Extract family name from a font spec. */
97 ns_get_family (Lisp_Object font_spec)
99 Lisp_Object tem = AREF (font_spec, FONT_FAMILY_INDEX);
104 char *tmp = xstrdup (SSDATA (SYMBOL_NAME (tem)));
106 ns_unescape_name (tmp);
107 family = [NSString stringWithUTF8String: tmp];
114 /* Return 0 if attr not set, else value (which might also be 0).
115 On Leopard 0 gets returned even on descriptors where the attribute
116 was never set, so there's no way to distinguish between unspecified
117 and set to not have. Callers should assume 0 means unspecified. */
119 ns_attribute_fvalue (NSFontDescriptor *fdesc, NSString *trait)
121 NSDictionary *tdict = [fdesc objectForKey: NSFontTraitsAttribute];
122 NSNumber *val = [tdict objectForKey: trait];
123 return val == nil ? 0.0 : [val floatValue];
127 /* Converts FONT_WEIGHT, FONT_SLANT, FONT_WIDTH, plus family and script/lang
128 to NSFont descriptor. Information under extra only needed for matching. */
129 #define STYLE_REF 100
130 static NSFontDescriptor *
131 ns_spec_to_descriptor (Lisp_Object font_spec)
133 NSFontDescriptor *fdesc;
134 NSMutableDictionary *fdAttrs = [NSMutableDictionary new];
135 NSMutableDictionary *tdict = [NSMutableDictionary new];
136 NSString *family = ns_get_family (font_spec);
139 /* add each attr in font_spec to fdAttrs.. */
140 n = min (FONT_WEIGHT_NUMERIC (font_spec), 200);
141 if (n != -1 && n != STYLE_REF)
142 [tdict setObject: [NSNumber numberWithFloat: (n - 100.0) / 100.0]
143 forKey: NSFontWeightTrait];
144 n = min (FONT_SLANT_NUMERIC (font_spec), 200);
145 if (n != -1 && n != STYLE_REF)
146 [tdict setObject: [NSNumber numberWithFloat: (n - 100.0) / 100.0]
147 forKey: NSFontSlantTrait];
148 n = min (FONT_WIDTH_NUMERIC (font_spec), 200);
149 if (n > -1 && (n > STYLE_REF + 10 || n < STYLE_REF - 10))
150 [tdict setObject: [NSNumber numberWithFloat: (n - 100.0) / 100.0]
151 forKey: NSFontWidthTrait];
152 if ([tdict count] > 0)
153 [fdAttrs setObject: tdict forKey: NSFontTraitsAttribute];
155 fdesc = [NSFontDescriptor fontDescriptorWithFontAttributes: fdAttrs];
158 fdesc = [fdesc fontDescriptorWithFamily: family];
167 /* Converts NSFont descriptor to FONT_WEIGHT, FONT_SLANT, FONT_WIDTH, etc.. */
169 ns_descriptor_to_entity (NSFontDescriptor *desc,
173 Lisp_Object font_entity = font_make_entity ();
174 /* NSString *psName = [desc postscriptName]; */
175 NSString *family = [desc objectForKey: NSFontFamilyAttribute];
176 unsigned int traits = [desc symbolicTraits];
179 /* Shouldn't happen, but on Tiger fallback desc gets name but no family. */
181 family = [desc objectForKey: NSFontNameAttribute];
183 family = [[NSFont userFixedPitchFontOfSize: 0] familyName];
185 escapedFamily = xstrdup ([family UTF8String]);
186 ns_escape_name (escapedFamily);
188 ASET (font_entity, FONT_TYPE_INDEX, Qns);
189 ASET (font_entity, FONT_FOUNDRY_INDEX, Qapple);
190 ASET (font_entity, FONT_FAMILY_INDEX, intern (escapedFamily));
191 ASET (font_entity, FONT_ADSTYLE_INDEX, style ? intern (style) : Qnil);
192 ASET (font_entity, FONT_REGISTRY_INDEX, Qiso10646_1);
194 FONT_SET_STYLE (font_entity, FONT_WEIGHT_INDEX,
195 traits & NSFontBoldTrait ? Qbold : Qmedium);
196 /* FONT_SET_STYLE (font_entity, FONT_WEIGHT_INDEX,
197 make_number (100 + 100
198 * ns_attribute_fvalue (desc, NSFontWeightTrait)));*/
199 FONT_SET_STYLE (font_entity, FONT_SLANT_INDEX,
200 traits & NSFontItalicTrait ? Qitalic : Qnormal);
201 /* FONT_SET_STYLE (font_entity, FONT_SLANT_INDEX,
202 make_number (100 + 100
203 * ns_attribute_fvalue (desc, NSFontSlantTrait)));*/
204 FONT_SET_STYLE (font_entity, FONT_WIDTH_INDEX,
205 traits & NSFontCondensedTrait ? Qcondensed :
206 traits & NSFontExpandedTrait ? Qexpanded : Qnormal);
207 /* FONT_SET_STYLE (font_entity, FONT_WIDTH_INDEX,
208 make_number (100 + 100
209 * ns_attribute_fvalue (desc, NSFontWidthTrait)));*/
211 ASET (font_entity, FONT_SIZE_INDEX, make_number (0));
212 ASET (font_entity, FONT_AVGWIDTH_INDEX, make_number (0));
213 ASET (font_entity, FONT_SPACING_INDEX,
214 make_number([desc symbolicTraits] & NSFontMonoSpaceTrait
215 ? FONT_SPACING_MONO : FONT_SPACING_PROPORTIONAL));
217 ASET (font_entity, FONT_EXTRA_INDEX, extra);
218 ASET (font_entity, FONT_OBJLIST_INDEX, Qnil);
222 fprintf (stderr, "created font_entity:\n ");
223 debug_print (font_entity);
226 xfree (escapedFamily);
231 /* Default font entity. */
233 ns_fallback_entity (void)
235 return ns_descriptor_to_entity ([[NSFont userFixedPitchFontOfSize: 0]
236 fontDescriptor], Qnil, NULL);
240 /* Utility: get width of a char c in screen font SFONT */
242 ns_char_width (NSFont *sfont, int c)
245 NSString *cstr = [NSString stringWithFormat: @"%c", c];
248 NSGlyph glyph = [sfont glyphWithName: cstr];
250 w = [sfont advancementForGlyph: glyph].width;
255 NSDictionary *attrsDictionary =
256 [NSDictionary dictionaryWithObject: sfont forKey: NSFontAttributeName];
257 w = [cstr sizeWithAttributes: attrsDictionary].width;
263 /* Return average width over ASCII printable characters for SFONT. */
265 static NSString *ascii_printable;
268 ns_ascii_average_width (NSFont *sfont)
272 if (!ascii_printable)
276 for (ch = 0; ch < 95; ch++)
277 chars[ch] = ' ' + ch;
280 ascii_printable = [[NSString alloc] initWithFormat: @"%s", chars];
284 NSGlyph glyph = [sfont glyphWithName: ascii_printable];
286 w = [sfont advancementForGlyph: glyph].width;
291 NSDictionary *attrsDictionary =
292 [NSDictionary dictionaryWithObject: sfont forKey: NSFontAttributeName];
293 w = [ascii_printable sizeWithAttributes: attrsDictionary].width;
296 return lrint (w / 95.0);
300 /* Return whether set1 covers set2 to a reasonable extent given by pct.
301 We check, out of each 16 Unicode char range containing chars in set2,
302 whether at least one character is present in set1.
303 This must be true for pct of the pairs to consider it covering. */
305 ns_charset_covers(NSCharacterSet *set1, NSCharacterSet *set2, float pct)
307 const unsigned short *bytes1 = [[set1 bitmapRepresentation] bytes];
308 const unsigned short *bytes2 = [[set2 bitmapRepresentation] bytes];
309 int i, off = 0, tot = 0;
311 /* Work around what appears to be a GNUstep bug.
312 See <http://bugs.gnu.org/11853>. */
313 if (! (bytes1 && bytes2))
316 for (i=0; i<4096; i++, bytes1++, bytes2++)
320 if (*bytes1 == 0) // *bytes1 & *bytes2 != *bytes2
323 //fprintf(stderr, "off = %d\ttot = %d\n", off,tot);
324 return (float)off / tot < 1.0 - pct;
328 /* Convert :lang property to a script. Use of :lang property by font backend
329 seems to be limited for now (2009/05) to ja, zh, and ko. */
331 *ns_lang_to_script (Lisp_Object lang)
333 if (!strcmp (SSDATA (SYMBOL_NAME (lang)), "ja"))
335 /* NOTE: ja given for any hanzi that's also a kanji, but Chinese fonts
336 have more characters. */
337 else if (!strcmp (SSDATA (SYMBOL_NAME (lang)), "zh"))
339 else if (!strcmp (SSDATA (SYMBOL_NAME (lang)), "ko"))
346 /* Convert OTF 4-letter script code to emacs script name. (Why can't
347 everyone just use some standard Unicode names for these?) */
349 *ns_otf_to_script (Lisp_Object otf)
351 Lisp_Object script = assq_no_quit (XCAR (otf), Votf_script_alist);
352 return CONSP (script)
353 ? [NSString stringWithUTF8String: SSDATA (SYMBOL_NAME (XCDR ((script))))]
358 /* Convert a font registry, such as */
360 *ns_registry_to_script (char *reg)
362 Lisp_Object script, r, rts = Vns_reg_to_script;
365 r = XCAR (XCAR (rts));
366 if (!strncmp(SSDATA(r), reg, strlen(SSDATA(r))))
368 script = XCDR (XCAR (rts));
369 return [NSString stringWithUTF8String: SSDATA (SYMBOL_NAME (script))];
377 /* Searches the :script, :lang, and :otf extra-bundle properties of the spec,
378 plus registry regular property, for something that can be mapped to a
379 Unicode script. Empty string returned if no script spec found. */
381 *ns_get_req_script (Lisp_Object font_spec)
383 Lisp_Object reg = AREF (font_spec, FONT_REGISTRY_INDEX);
384 Lisp_Object extra = AREF (font_spec, FONT_EXTRA_INDEX);
386 /* The extra-bundle properties have priority. */
387 for ( ; CONSP (extra); extra = XCDR (extra))
389 Lisp_Object tmp = XCAR (extra);
392 Lisp_Object key = XCAR (tmp), val = XCDR (tmp);
393 if (EQ (key, QCscript) && SYMBOLP (val))
394 return [NSString stringWithUTF8String:
395 SSDATA (SYMBOL_NAME (val))];
396 if (EQ (key, QClang) && SYMBOLP (val))
397 return ns_lang_to_script (val);
398 if (EQ (key, QCotf) && CONSP (val) && SYMBOLP (XCAR (val)))
399 return ns_otf_to_script (val);
403 /* If we get here, check the charset portion of the registry. */
406 /* XXX: iso10646 is passed in for non-ascii latin-1 characters
407 (which causes box rendering if we don't treat it like iso8858-1)
408 but also for ascii (which causes unnecessary font substitution). */
410 if (EQ (reg, Qiso10646_1))
413 return ns_registry_to_script (SSDATA (SYMBOL_NAME (reg)));
420 /* This small function is static in fontset.c. If it can be made public for
421 all ports, remove this, but otherwise it doesn't seem worth the ifdefs. */
423 accumulate_script_ranges (Lisp_Object arg, Lisp_Object range, Lisp_Object val)
425 if (EQ (XCAR (arg), val))
428 XSETCDR (arg, Fcons (Fcons (XCAR (range), XCDR (range)), XCDR (arg)));
430 XSETCDR (arg, Fcons (Fcons (range, range), XCDR (arg)));
435 /* Use the Unicode range information in Vchar_script_table to convert a script
436 name into an NSCharacterSet. */
437 static NSCharacterSet
438 *ns_script_to_charset (NSString *scriptName)
440 NSMutableCharacterSet *charset = [NSMutableCharacterSet new];
441 Lisp_Object script = intern ([scriptName UTF8String]);
442 Lisp_Object script_list = XCHAR_TABLE (Vchar_script_table)->extras[0];
444 if (! NILP (Fmemq (script, script_list)))
446 Lisp_Object ranges, range_list;
448 ranges = Fcons (script, Qnil);
449 map_char_table (accumulate_script_ranges, Qnil, Vchar_script_table,
451 range_list = Fnreverse (XCDR (ranges));
452 if (! NILP (range_list))
454 for (; CONSP (range_list); range_list = XCDR (range_list))
456 int start = XINT (XCAR (XCAR (range_list)));
457 int end = XINT (XCDR (XCAR (range_list)));
459 debug_print (XCAR (range_list));
461 [charset addCharactersInRange:
462 NSMakeRange (start, end-start)];
470 /* Return an array of font families containing characters for the given
471 script, for the given coverage criterion, including at least LastResort.
472 Results are cached by script for faster access.
473 If none are found, we reduce the percentage and try again, until 5%.
474 This provides a font with at least some characters if such can be found.
475 We don't use isSupersetOfSet: because (a) it doesn't work on Tiger, and
476 (b) need approximate match as fonts covering full Unicode ranges are rare. */
478 *ns_get_covering_families (NSString *script, float pct)
480 static NSMutableDictionary *scriptToFamilies = nil;
481 NSMutableSet *families;
484 NSLog(@"Request covering families for script: '%@'", script);
486 if (scriptToFamilies == nil)
487 scriptToFamilies = [[NSMutableDictionary alloc] init];
489 if ((families = [scriptToFamilies objectForKey: script]) == nil)
491 NSFontManager *fontMgr = [NSFontManager sharedFontManager];
492 NSArray *allFamilies = [fontMgr availableFontFamilies];
494 if ([script length] == 0)
495 families = [NSMutableSet setWithArray: allFamilies];
498 NSCharacterSet *charset = ns_script_to_charset (script);
500 families = [NSMutableSet setWithCapacity: 10];
503 NSEnumerator *allFamiliesEnum = [allFamilies objectEnumerator];
504 while ((family = [allFamiliesEnum nextObject]))
506 NSCharacterSet *fset = [[fontMgr fontWithFamily: family
507 traits: 0 weight: 5 size: 12.0] coveredCharacterSet];
508 /* Some fonts on OS X, maybe many on GNUstep, return nil. */
510 fset = [NSCharacterSet characterSetWithRange:
511 NSMakeRange (0, 127)];
512 if (ns_charset_covers(fset, charset, pct))
513 [families addObject: family];
516 if ([families count] > 0 || pct < 0.05)
522 if ([families count] == 0)
523 [families addObject: @"LastResort"];
525 [scriptToFamilies setObject: families forKey: script];
529 NSLog(@" returning %d families", [families count]);
534 /* Implementation for list() and match(). List() can return nil, match()
535 must return something. Strategy is to drop family name from attribute
536 matching set for match. */
538 ns_findfonts (Lisp_Object font_spec, BOOL isMatch)
540 Lisp_Object tem, list = Qnil;
541 NSFontDescriptor *fdesc, *desc;
543 NSArray *matchingDescs;
551 fprintf (stderr, "nsfont: %s for fontspec:\n ",
552 (isMatch ? "match" : "list"));
553 debug_print (font_spec);
556 cFamilies = ns_get_covering_families (ns_get_req_script (font_spec), 0.90);
558 fdesc = ns_spec_to_descriptor (font_spec);
559 fkeys = [NSMutableSet setWithArray: [[fdesc fontAttributes] allKeys]];
561 [fkeys removeObject: NSFontFamilyAttribute];
563 if ([fkeys count] > 0)
564 matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys: fkeys];
566 matchingDescs = [NSMutableArray array];
569 NSLog(@"Got desc %@ and found %d matching fonts from it: ", fdesc,
570 [matchingDescs count]);
572 for (dEnum = [matchingDescs objectEnumerator]; (desc = [dEnum nextObject]);)
574 if (![cFamilies containsObject:
575 [desc objectForKey: NSFontFamilyAttribute]])
577 tem = ns_descriptor_to_entity (desc,
578 AREF (font_spec, FONT_EXTRA_INDEX),
582 list = Fcons (tem, list);
583 if (fabs (ns_attribute_fvalue (desc, NSFontSlantTrait)) > 0.05)
587 /* Add synthItal member if needed. */
588 family = [fdesc objectForKey: NSFontFamilyAttribute];
589 if (family != nil && !foundItal && XINT (Flength (list)) > 0)
591 NSFontDescriptor *s1 = [NSFontDescriptor new];
592 NSFontDescriptor *sDesc
593 = [[s1 fontDescriptorWithSymbolicTraits: NSFontItalicTrait]
594 fontDescriptorWithFamily: family];
595 list = Fcons (ns_descriptor_to_entity (sDesc,
596 AREF (font_spec, FONT_EXTRA_INDEX),
601 /* Return something if was a match and nothing found. */
603 return ns_fallback_entity ();
606 fprintf (stderr, " Returning %"pI"d entities.\n",
607 XINT (Flength (list)));
614 /* ==========================================================================
616 Font driver implementation
618 ========================================================================== */
621 static Lisp_Object nsfont_get_cache (FRAME_PTR frame);
622 static Lisp_Object nsfont_list (Lisp_Object frame, Lisp_Object font_spec);
623 static Lisp_Object nsfont_match (Lisp_Object frame, Lisp_Object font_spec);
624 static Lisp_Object nsfont_list_family (Lisp_Object frame);
625 static Lisp_Object nsfont_open (FRAME_PTR f, Lisp_Object font_entity,
627 static void nsfont_close (FRAME_PTR f, struct font *font);
628 static int nsfont_has_char (Lisp_Object entity, int c);
629 static unsigned int nsfont_encode_char (struct font *font, int c);
630 static int nsfont_text_extents (struct font *font, unsigned int *code,
631 int nglyphs, struct font_metrics *metrics);
632 static int nsfont_draw (struct glyph_string *s, int from, int to, int x, int y,
633 bool with_background);
635 struct font_driver nsfont_driver =
638 1, /* case sensitive */
643 NULL, /*free_entity */
646 NULL, /* prepare_face */
647 NULL, /* done_face */
652 /* excluded: get_bitmap, free_bitmap, get_outline, free_outline,
653 anchor_point, otf_capability, otf_driver,
654 start_for_frame, end_for_frame, shape */
658 /* Return a cache of font-entities on FRAME. The cache must be a
659 cons whose cdr part is the actual cache area. */
661 nsfont_get_cache (FRAME_PTR frame)
663 Display_Info *dpyinfo = FRAME_NS_DISPLAY_INFO (frame);
664 return (dpyinfo->name_list_element);
668 /* List fonts exactly matching with FONT_SPEC on FRAME. The value is a
669 **list** of font-entities. This and match () are sole APIs that allocate
670 font-entities. Properties to be considered (2009/05/19) are:
671 regular: foundry, family, adstyle, registry
672 extended: script, lang, otf
673 "Extended" properties are not part of the vector but get stored as
674 lisp properties under FONT_EXTRA_INDEX.
676 The returned entities should have type set (to 'ns), plus the following:
677 foundry, family, adstyle, registry,
678 weight, slant, width, size (0 if scalable),
679 dpi, spacing, avgwidth (0 if scalable) */
681 nsfont_list (Lisp_Object frame, Lisp_Object font_spec)
683 return ns_findfonts (font_spec, NO);
687 /* Return a font entity most closely matching with FONT_SPEC on
688 FRAME. The closeness is determined by the font backend, thus
689 `face-font-selection-order' is ignored here.
690 Properties to be considered are same as for list(). */
692 nsfont_match (Lisp_Object frame, Lisp_Object font_spec)
694 return ns_findfonts(font_spec, YES);
698 /* List available families. The value is a list of family names
701 nsfont_list_family (Lisp_Object frame)
703 Lisp_Object list = Qnil;
704 NSEnumerator *families =
705 [[[NSFontManager sharedFontManager] availableFontFamilies]
708 while ((family = [families nextObject]))
709 list = Fcons (intern ([family UTF8String]), list);
710 /* FIXME: escape the name? */
713 fprintf (stderr, "nsfont: list families returning %"pI"d entries\n",
714 XINT (Flength (list)));
720 /* Open a font specified by FONT_ENTITY on frame F. If the font is
721 scalable, open it with PIXEL_SIZE. */
723 nsfont_open (FRAME_PTR f, Lisp_Object font_entity, int pixel_size)
726 unsigned int traits = 0;
727 struct nsfont_info *font_info;
729 NSFontDescriptor *fontDesc = ns_spec_to_descriptor (font_entity);
730 NSFontManager *fontMgr = [NSFontManager sharedFontManager];
732 NSFont *nsfont, *sfont;
735 Lisp_Object font_object;
740 fprintf (stderr, "nsfont: open size %d of fontentity:\n ", pixel_size);
741 debug_print (font_entity);
746 /* try to get it out of frame params */
747 Lisp_Object tem = get_frame_param (f, Qfontsize);
748 pixel_size = NILP (tem) ? 0 : XFASTINT (tem);
751 tem = AREF (font_entity, FONT_ADSTYLE_INDEX);
752 synthItal = !NILP (tem) && !strncmp ("synthItal", SSDATA (SYMBOL_NAME (tem)),
754 family = ns_get_family (font_entity);
756 family = [[NSFont userFixedPitchFontOfSize: 0] familyName];
757 /* Should be > 0.23 as some font descriptors (e.g. Terminus) set to that
758 when setting family in ns_spec_to_descriptor(). */
759 if (ns_attribute_fvalue (fontDesc, NSFontWeightTrait) > 0.50)
760 traits |= NSBoldFontMask;
761 if (fabs (ns_attribute_fvalue (fontDesc, NSFontSlantTrait) > 0.05))
762 traits |= NSItalicFontMask;
764 /* see http://cocoadev.com/forums/comments.php?DiscussionID=74 */
765 fixLeopardBug = traits & NSBoldFontMask ? 10 : 5;
766 nsfont = [fontMgr fontWithFamily: family
767 traits: traits weight: fixLeopardBug
769 /* if didn't find, try synthetic italic */
770 if (nsfont == nil && synthItal)
772 nsfont = [fontMgr fontWithFamily: family
773 traits: traits & ~NSItalicFontMask
774 weight: fixLeopardBug size: pixel_size];
777 /* LastResort not really a family */
778 if (nsfont == nil && [@"LastResort" isEqualToString: family])
779 nsfont = [NSFont fontWithName: @"LastResort" size: pixel_size];
784 message_with_string ("*** Warning: font in family '%s' not found",
785 build_string ([family UTF8String]), 1);
786 nsfont = [NSFont userFixedPitchFontOfSize: pixel_size];
790 NSLog (@"%@\n", nsfont);
792 font_object = font_make_object (VECSIZE (struct nsfont_info),
793 font_entity, pixel_size);
794 font_info = (struct nsfont_info *) XFONT_OBJECT (font_object);
795 font = (struct font *) font_info;
797 return Qnil; /* FIXME: other terms do, but return Qnil causes segfault */
799 font_info->glyphs = xzalloc (0x100 * sizeof *font_info->glyphs);
800 font_info->metrics = xzalloc (0x100 * sizeof *font_info->metrics);
806 sfont = [nsfont screenFontWithRenderingMode:
807 NSFontAntialiasedIntegerAdvancementsRenderingMode];
809 sfont = [nsfont screenFont];
815 /* non-metric backend font struct fields */
816 font = (struct font *) font_info;
817 font->pixel_size = [sfont pointSize];
818 font->driver = &nsfont_driver;
819 font->encoding_charset = -1;
820 font->repertory_charset = -1;
821 font->default_ascent = 0;
822 font->vertical_centering = 0;
823 font->baseline_offset = 0;
824 font->relative_compose = 0;
825 font->font_encoder = NULL;
827 font->props[FONT_FORMAT_INDEX] = Qns;
828 font->props[FONT_FILE_INDEX] = Qnil;
831 const char *fontName = [[nsfont fontName] UTF8String];
833 /* The values specified by fonts are not always exact. For
834 * example, a 6x8 font could specify that the descender is
835 * -2.00000405... (represented by 0xc000000220000000). Without
836 * adjustment, the code below would round the descender to -3,
837 * resulting in a font that would be one pixel higher than
839 CGFloat adjusted_descender = [sfont descender] + 0.0001;
841 #ifdef NS_IMPL_GNUSTEP
842 font_info->nsfont = sfont;
844 font_info->nsfont = nsfont;
846 [font_info->nsfont retain];
848 /* set up ns_font (defined in nsgui.h) */
849 font_info->name = xstrdup (fontName);
850 font_info->bold = [fontMgr traitsOfFont: nsfont] & NSBoldFontMask;
852 synthItal || ([fontMgr traitsOfFont: nsfont] & NSItalicFontMask);
854 /* Metrics etc.; some fonts return an unusually large max advance, so we
855 only use it for fonts that have wide characters. */
856 font_info->width = ([sfont numberOfGlyphs] > 2000) ?
857 [sfont maximumAdvancement].width : ns_char_width (sfont, '0');
859 brect = [sfont boundingRectForFont];
861 font_info->underpos = [sfont underlinePosition];
862 font_info->underwidth = [sfont underlineThickness];
863 font_info->size = font->pixel_size;
866 font_info->max_bounds.ascent = lrint ([sfont ascender]);
867 /* Descender is usually negative. Use floor to avoid
868 clipping descenders. */
869 font_info->max_bounds.descent = -lrint (floor(adjusted_descender));
871 font_info->max_bounds.ascent + font_info->max_bounds.descent;
872 font_info->max_bounds.width = lrint (font_info->width);
873 font_info->max_bounds.lbearing = lrint (brect.origin.x);
874 font_info->max_bounds.rbearing =
875 lrint (brect.size.width - font_info->width);
878 /* set up synthItal and the CG font */
879 font_info->synthItal = synthItal;
881 ATSFontRef atsFont = ATSFontFindFromPostScriptName
882 ((CFStringRef)[nsfont fontName], kATSOptionFlagsDefault);
884 if (atsFont == kATSFontRefUnspecified)
886 /* see if we can get it by dropping italic (then synthesizing) */
887 atsFont = ATSFontFindFromPostScriptName ((CFStringRef)
888 [[fontMgr convertFont: nsfont toNotHaveTrait: NSItalicFontMask]
889 fontName], kATSOptionFlagsDefault);
890 if (atsFont != kATSFontRefUnspecified)
891 font_info->synthItal = YES;
894 /* last resort fallback */
895 atsFont = ATSFontFindFromPostScriptName
896 ((CFStringRef)@"Monaco", kATSOptionFlagsDefault);
899 font_info->cgfont = CGFontCreateWithPlatformFont ((void*)&atsFont);
903 /* set up metrics portion of font struct */
904 font->ascent = lrint([sfont ascender]);
905 font->descent = -lrint(floor(adjusted_descender));
906 font->space_width = lrint (ns_char_width (sfont, ' '));
907 font->max_width = lrint (font_info->max_bounds.width);
908 font->min_width = font->space_width; /* Approximate. */
909 font->average_width = ns_ascii_average_width (sfont);
911 font->height = lrint (font_info->height);
912 font->underline_position = lrint (font_info->underpos);
913 font->underline_thickness = lrint (font_info->underwidth);
915 font->props[FONT_NAME_INDEX] = Ffont_xlfd_name (font_object, Qnil);
916 font->props[FONT_FULLNAME_INDEX] =
917 make_unibyte_string (font_info->name, strlen (font_info->name));
925 /* Close FONT on frame F. */
927 nsfont_close (FRAME_PTR f, struct font *font)
929 struct nsfont_info *font_info = (struct nsfont_info *)font;
932 /* FIXME: this occurs apparently due to same failure to detect same font
933 that causes need for cache in nsfont_open () */
937 for (i =0; i<0x100; i++)
939 xfree (font_info->glyphs[i]);
940 xfree (font_info->metrics[i]);
942 [font_info->nsfont release];
944 CGFontRelease (font_info->cgfont);
946 xfree (font_info->name);
951 /* If FONT_ENTITY has a glyph for character C (Unicode code point),
952 return 1. If not, return 0. If a font must be opened to check
955 nsfont_has_char (Lisp_Object entity, int c)
961 /* Return a glyph code of FONT for character C (Unicode code point).
962 If FONT doesn't have such a glyph, return FONT_INVALID_CODE. */
964 nsfont_encode_char (struct font *font, int c)
966 struct nsfont_info *font_info = (struct nsfont_info *)font;
967 unsigned char high = (c & 0xff00) >> 8, low = c & 0x00ff;
971 return FONT_INVALID_CODE;
973 /* did we already cache this block? */
974 if (!font_info->glyphs[high])
975 ns_uni_to_glyphs (font_info, high);
977 g = font_info->glyphs[high][low];
978 return g == 0xFFFF ? FONT_INVALID_CODE : g;
982 /* Perform the size computation of glyphs of FONT and fill in members
983 of METRICS. The glyphs are specified by their glyph codes in
984 CODE (length NGLYPHS). */
986 nsfont_text_extents (struct font *font, unsigned int *code, int nglyphs,
987 struct font_metrics *metrics)
989 struct nsfont_info *font_info = (struct nsfont_info *)font;
990 struct font_metrics *pcm;
991 unsigned char high, low;
995 memset (metrics, 0, sizeof (struct font_metrics));
997 for (i =0; i<nglyphs; i++)
999 /* get metrics for this glyph, filling cache if need be */
1000 /* TODO: get metrics for whole string from an NSLayoutManager
1001 (if not too slow) */
1002 high = (code[i] & 0xFF00) >> 8;
1003 low = code[i] & 0x00FF;
1004 if (!font_info->metrics[high])
1005 ns_glyph_metrics (font_info, high);
1006 pcm = &(font_info->metrics[high][low]);
1008 if (metrics->lbearing > totalWidth + pcm->lbearing)
1009 metrics->lbearing = totalWidth + pcm->lbearing;
1010 if (metrics->rbearing < totalWidth + pcm->rbearing)
1011 metrics->rbearing = totalWidth + pcm->rbearing;
1012 if (metrics->ascent < pcm->ascent)
1013 metrics->ascent = pcm->ascent;
1014 if (metrics->descent < pcm->descent)
1015 metrics->descent = pcm->descent;
1017 totalWidth += pcm->width;
1020 metrics->width = totalWidth;
1022 return totalWidth; /* not specified in doc, but xfont.c does it */
1026 /* Draw glyphs between FROM and TO of S->char2b at (X Y) pixel
1027 position of frame F with S->FACE and S->GC. If WITH_BACKGROUND,
1028 fill the background in advance. It is assured that WITH_BACKGROUND
1029 is false when (FROM > 0 || TO < S->nchars). */
1031 nsfont_draw (struct glyph_string *s, int from, int to, int x, int y,
1032 bool with_background)
1033 /* NOTE: focus and clip must be set
1034 also, currently assumed (true in nsterm.m call) from ==0, to ==nchars */
1036 static char cbuf[1024];
1038 #ifdef NS_IMPL_GNUSTEP
1039 static float advances[1024];
1040 float *adv = advances;
1042 static CGSize advances[1024];
1043 CGSize *adv = advances;
1047 struct nsfont_info *font = ns_tmp_font;
1048 NSColor *col, *bgCol;
1049 unsigned short *t = s->char2b;
1051 char isComposite = s->first_glyph->type == COMPOSITE_GLYPH;
1052 int end = isComposite ? s->cmp_to : s->nchars;
1054 /* Select face based on input flags */
1055 switch (ns_tmp_flags)
1057 case NS_DUMPGLYPH_CURSOR:
1060 case NS_DUMPGLYPH_MOUSEFACE:
1061 face = FACE_FROM_ID (s->f, MOUSE_HL_INFO (s->f)->mouse_face_face_id);
1063 face = FACE_FROM_ID (s->f, MOUSE_FACE_ID);
1070 if (s->face->box != FACE_NO_BOX && s->first_glyph->left_box_line_p)
1071 r.origin.x += abs (s->face->box_line_width);
1074 r.size.height = FONT_HEIGHT (font);
1076 /* Convert UTF-16 (?) to UTF-8 and determine advances. Note if we just ask
1077 NS to render the string, it will come out differently from the individual
1078 character widths added up because of layout processing. */
1080 int cwidth, twidth = 0;
1082 /* FIXME: composition: no vertical displacement is considered. */
1083 t += s->cmp_from; /* advance into composition */
1084 for (i = s->cmp_from; i < end; i++, t++)
1086 hi = (*t & 0xFF00) >> 8;
1090 if (!s->first_glyph->u.cmp.automatic)
1091 cwidth = s->cmp->offsets[i * 2] /* (H offset) */ - twidth;
1094 Lisp_Object gstring = composition_gstring_from_id (s->cmp_id);
1095 Lisp_Object glyph = LGSTRING_GLYPH (gstring, i);
1096 if (NILP (LGLYPH_ADJUSTMENT (glyph)))
1097 cwidth = LGLYPH_WIDTH (glyph);
1100 cwidth = LGLYPH_WADJUST (glyph);
1101 #ifdef NS_IMPL_GNUSTEP
1102 *(adv-1) += LGLYPH_XOFF (glyph);
1104 (*(adv-1)).width += LGLYPH_XOFF (glyph);
1111 if (!font->metrics[hi]) /* FIXME: why/how can we need this now? */
1112 ns_glyph_metrics (font, hi);
1113 cwidth = font->metrics[hi][lo].width;
1116 #ifdef NS_IMPL_GNUSTEP
1118 CHAR_STRING_ADVANCE (*t, c); /* this converts the char to UTF-8 */
1120 (*adv++).width = cwidth;
1123 len = adv - advances;
1124 r.size.width = twidth;
1128 /* fill background if requested */
1129 if (with_background && !isComposite)
1132 int fibw = FRAME_INTERNAL_BORDER_WIDTH (s->f);
1133 int mbox_line_width = max (s->face->box_line_width, 0);
1135 if (s->row->full_width_p)
1137 if (br.origin.x <= fibw + 1 + mbox_line_width)
1139 br.size.width += br.origin.x - mbox_line_width;
1140 br.origin.x = mbox_line_width;
1142 if (FRAME_PIXEL_WIDTH (s->f) - (br.origin.x + br.size.width)
1144 br.size.width += fibw;
1146 if (s->face->box == FACE_NO_BOX)
1148 /* expand unboxed top row over internal border */
1149 if (br.origin.y <= fibw + 1 + mbox_line_width)
1151 br.size.height += br.origin.y;
1157 int correction = abs (s->face->box_line_width)+1;
1158 br.origin.y += correction;
1159 br.size.height -= 2*correction;
1160 br.origin.x += correction;
1161 br.size.width -= 2*correction;
1164 if (!s->face->stipple)
1165 [(NS_FACE_BACKGROUND (face) != 0
1166 ? ns_lookup_indexed_color (NS_FACE_BACKGROUND (face), s->f)
1167 : FRAME_BACKGROUND_COLOR (s->f)) set];
1170 struct ns_display_info *dpyinfo = FRAME_NS_DISPLAY_INFO (s->f);
1171 [[dpyinfo->bitmaps[face->stipple-1].img stippleMask] set];
1177 /* set up for character rendering */
1178 r.origin.y = s->ybase;
1180 col = (NS_FACE_FOREGROUND (face) != 0
1181 ? ns_lookup_indexed_color (NS_FACE_FOREGROUND (face), s->f)
1182 : FRAME_FOREGROUND_COLOR (s->f));
1183 /* FIXME: find another way to pass this */
1184 bgCol = (ns_tmp_flags != NS_DUMPGLYPH_FOREGROUND ? nil
1185 : (NS_FACE_BACKGROUND (face) != 0
1186 ? ns_lookup_indexed_color (NS_FACE_BACKGROUND (face), s->f)
1187 : FRAME_BACKGROUND_COLOR (s->f)));
1189 /* render under GNUstep using DPS */
1190 #ifdef NS_IMPL_GNUSTEP
1192 NSGraphicsContext *context = GSCurrentContext ();
1197 /* do erase if "foreground" mode */
1201 DPSmoveto (context, r.origin.x, r.origin.y);
1202 /*[context GSSetTextDrawingMode: GSTextFillStroke]; /// not implemented yet */
1203 DPSxshow (context, cbuf, advances, len);
1204 DPSstroke (context);
1206 /*[context GSSetTextDrawingMode: GSTextFill]; /// not implemented yet */
1211 /* draw with DPSxshow () */
1212 DPSmoveto (context, r.origin.x, r.origin.y);
1213 DPSxshow (context, cbuf, advances, len);
1214 DPSstroke (context);
1216 DPSgrestore (context);
1219 #else /* NS_IMPL_COCOA */
1221 CGContextRef gcontext =
1222 [[NSGraphicsContext currentContext] graphicsPort];
1223 static CGAffineTransform fliptf;
1224 static BOOL firstTime = YES;
1229 fliptf = CGAffineTransformMakeScale (1.0, -1.0);
1232 CGContextSaveGState (gcontext);
1234 fliptf.c = font->synthItal ? Fix2X (kATSItalicQDSkew) : 0.0;
1236 CGContextSetFont (gcontext, font->cgfont);
1237 CGContextSetFontSize (gcontext, font->size);
1238 if (NILP (ns_antialias_text) || font->size <= ns_antialias_threshold)
1239 CGContextSetShouldAntialias (gcontext, 0);
1241 CGContextSetShouldAntialias (gcontext, 1);
1243 CGContextSetShouldSmoothFonts (gcontext, NO);
1244 CGContextSetTextMatrix (gcontext, fliptf);
1248 /* foreground drawing; erase first to avoid overstrike */
1250 CGContextSetTextDrawingMode (gcontext, kCGTextFillStroke);
1251 CGContextSetTextPosition (gcontext, r.origin.x, r.origin.y);
1252 CGContextShowGlyphsWithAdvances (gcontext, s->char2b, advances, len);
1253 CGContextSetTextDrawingMode (gcontext, kCGTextFill);
1258 CGContextSetTextPosition (gcontext, r.origin.x, r.origin.y);
1259 CGContextShowGlyphsWithAdvances (gcontext, s->char2b + s->cmp_from,
1262 if (face->overstrike)
1264 CGContextSetTextPosition (gcontext, r.origin.x+0.5, r.origin.y);
1265 CGContextShowGlyphsWithAdvances (gcontext, s->char2b + s->cmp_from,
1269 CGContextRestoreGState (gcontext);
1271 #endif /* NS_IMPL_COCOA */
1273 /* Draw underline, overline, strike-through. */
1274 ns_draw_text_decoration (s, face, col, r.size.width, r.origin.x);
1281 /* ==========================================================================
1283 Font glyph and metrics caching functions
1285 ========================================================================== */
1287 /* Find and cache corresponding glyph codes for unicode values in given
1288 hi-byte block of 256. */
1290 ns_uni_to_glyphs (struct nsfont_info *font_info, unsigned char block)
1292 #ifdef NS_IMPL_COCOA
1293 static EmacsGlyphStorage *glyphStorage;
1294 static char firstTime = 1;
1296 unichar *unichars = xmalloc (0x101 * sizeof (unichar));
1297 unsigned int i, g, idx;
1298 unsigned short *glyphs;
1301 fprintf (stderr, "%p\tFinding glyphs for glyphs in block %d\n",
1306 #ifdef NS_IMPL_COCOA
1310 glyphStorage = [[EmacsGlyphStorage alloc] initWithCapacity: 0x100];
1314 font_info->glyphs[block] = xmalloc (0x100 * sizeof (unsigned short));
1315 if (!unichars || !(font_info->glyphs[block]))
1318 /* create a string containing all Unicode characters in this block */
1319 for (idx = block<<8, i = 0; i < 0x100; idx++, i++)
1320 if (idx < 0xD800 || idx > 0xDFFF)
1323 unichars[i] = 0xFEFF;
1324 unichars[0x100] = 0;
1327 #ifdef NS_IMPL_COCOA
1328 NSString *allChars = [[NSString alloc]
1329 initWithCharactersNoCopy: unichars
1332 NSGlyphGenerator *glyphGenerator = [NSGlyphGenerator sharedGlyphGenerator];
1333 /*NSCharacterSet *coveredChars = [nsfont coveredCharacterSet]; */
1334 unsigned int numGlyphs = [font_info->nsfont numberOfGlyphs];
1335 NSUInteger gInd = 0, cInd = 0;
1337 [glyphStorage setString: allChars font: font_info->nsfont];
1338 [glyphGenerator generateGlyphsForGlyphStorage: glyphStorage
1339 desiredNumberOfCharacters: glyphStorage->maxChar
1340 glyphIndex: &gInd characterIndex: &cInd];
1342 glyphs = font_info->glyphs[block];
1343 for (i = 0; i < 0x100; i++, glyphs++)
1345 #ifdef NS_IMPL_GNUSTEP
1348 g = glyphStorage->cglyphs[i];
1349 /* TODO: is this a good check? maybe need to use coveredChars.. */
1351 g = 0xFFFF; /* hopefully unused... */
1356 #ifdef NS_IMPL_COCOA
1366 /* Determine and cache metrics for corresponding glyph codes in given
1367 hi-byte block of 256. */
1369 ns_glyph_metrics (struct nsfont_info *font_info, unsigned char block)
1372 unsigned int numGlyphs = [font_info->nsfont numberOfGlyphs];
1374 struct font_metrics *metrics;
1377 fprintf (stderr, "%p\tComputing metrics for glyphs in block %d\n",
1380 #ifdef NS_IMPL_GNUSTEP
1381 /* not implemented yet (as of startup 0.18), so punt */
1383 numGlyphs = 0x10000;
1387 #ifdef NS_IMPL_COCOA
1388 sfont = [font_info->nsfont screenFontWithRenderingMode:
1389 NSFontAntialiasedIntegerAdvancementsRenderingMode];
1391 sfont = [font_info->nsfont screenFont];
1394 font_info->metrics[block] = xzalloc (0x100 * sizeof (struct font_metrics));
1395 if (!(font_info->metrics[block]))
1398 metrics = font_info->metrics[block];
1399 for (g = block<<8, i =0; i<0x100 && g < numGlyphs; g++, i++, metrics++)
1402 NSRect r = [sfont boundingRectForGlyph: g];
1404 w = max ([sfont advancementForGlyph: g].width, 2.0);
1405 metrics->width = lrint (w);
1408 rb = r.size.width - w;
1410 metrics->lbearing = round (lb);
1411 if (font_info->ital)
1412 rb += 0.22 * font_info->height;
1413 metrics->rbearing = lrint (w + rb);
1415 metrics->descent = r.origin.y < 0 ? -r.origin.y : 0;
1416 /*lrint (hshrink * [sfont ascender] + expand * hd/2); */
1417 metrics->ascent = r.size.height - metrics->descent;
1418 /*-lrint (hshrink* [sfont descender] - expand * hd/2); */
1424 #ifdef NS_IMPL_COCOA
1425 /* helper for font glyph setup */
1426 @implementation EmacsGlyphStorage
1430 return [self initWithCapacity: 1024];
1433 - initWithCapacity: (unsigned long) c
1435 self = [super init];
1438 dict = [NSMutableDictionary new];
1439 cglyphs = xmalloc (c * sizeof (CGGlyph));
1452 - (void) setString: (NSString *)str font: (NSFont *)font
1454 [dict setObject: font forKey: NSFontAttributeName];
1457 attrStr = [[NSAttributedString alloc] initWithString: str attributes: dict];
1458 maxChar = [str length];
1462 /* NSGlyphStorage protocol */
1463 - (NSUInteger)layoutOptions
1468 - (NSAttributedString *)attributedString
1473 - (void)insertGlyphs: (const NSGlyph *)glyphs length: (NSUInteger)length
1474 forStartingGlyphAtIndex: (NSUInteger)glyphIndex
1475 characterIndex: (NSUInteger)charIndex
1477 len = glyphIndex+length;
1478 for (i =glyphIndex; i<len; i++)
1479 cglyphs[i] = glyphs[i-glyphIndex];
1484 - (void)setIntAttribute: (NSInteger)attributeTag value: (NSInteger)val
1485 forGlyphAtIndex: (NSUInteger)glyphIndex
1491 #endif /* NS_IMPL_COCOA */
1496 ns_dump_glyphstring (struct glyph_string *s)
1500 fprintf (stderr, "Glyph string len = %d at (%d, %d) overhang (%d, %d),"
1501 "overlap = %d, bg_filled = %d:",
1502 s->nchars, s->x, s->y, s->left_overhang, s->right_overhang,
1503 s->row->overlapping_p, s->background_filled_p);
1504 for (i =0; i<s->nchars; i++)
1505 fprintf (stderr, "%c", s->first_glyph[i].u.ch);
1506 fprintf (stderr, "\n");
1511 syms_of_nsfont (void)
1513 nsfont_driver.type = Qns;
1514 register_font_driver (&nsfont_driver, NULL);
1515 DEFSYM (Qcondensed, "condensed");
1516 DEFSYM (Qexpanded, "expanded");
1517 DEFSYM (Qapple, "apple");
1518 DEFSYM (Qroman, "roman");
1519 DEFSYM (Qmedium, "medium");
1520 DEFVAR_LISP ("ns-reg-to-script", Vns_reg_to_script,
1521 doc: /* Internal use: maps font registry to Unicode script. */);
1523 ascii_printable = NULL;