}
}
+\f
+/* This part (through the next ^L) is still experimental and not
+ tested much. We may drastically change codes. */
+
+/* OTF handler. */
+
+#if 0
+
+#define LGSTRING_HEADER_SIZE 6
+#define LGSTRING_GLYPH_SIZE 8
+
+static int
+check_gstring (Lisp_Object gstring)
+{
+ Lisp_Object val;
+ ptrdiff_t i;
+ int j;
+
+ CHECK_VECTOR (gstring);
+ val = AREF (gstring, 0);
+ CHECK_VECTOR (val);
+ if (ASIZE (val) < LGSTRING_HEADER_SIZE)
+ goto err;
+ CHECK_FONT_OBJECT (LGSTRING_FONT (gstring));
+ if (!NILP (LGSTRING_SLOT (gstring, LGSTRING_IX_LBEARING)))
+ CHECK_FIXNUM (LGSTRING_SLOT (gstring, LGSTRING_IX_LBEARING));
+ if (!NILP (LGSTRING_SLOT (gstring, LGSTRING_IX_RBEARING)))
+ CHECK_FIXNUM (LGSTRING_SLOT (gstring, LGSTRING_IX_RBEARING));
+ if (!NILP (LGSTRING_SLOT (gstring, LGSTRING_IX_WIDTH)))
+ CHECK_FIXNAT (LGSTRING_SLOT (gstring, LGSTRING_IX_WIDTH));
+ if (!NILP (LGSTRING_SLOT (gstring, LGSTRING_IX_ASCENT)))
+ CHECK_FIXNUM (LGSTRING_SLOT (gstring, LGSTRING_IX_ASCENT));
+ if (!NILP (LGSTRING_SLOT (gstring, LGSTRING_IX_ASCENT)))
+ CHECK_FIXNUM (LGSTRING_SLOT (gstring, LGSTRING_IX_ASCENT));
+
+ for (i = 0; i < LGSTRING_GLYPH_LEN (gstring); i++)
+ {
+ val = LGSTRING_GLYPH (gstring, i);
+ CHECK_VECTOR (val);
+ if (ASIZE (val) < LGSTRING_GLYPH_SIZE)
+ goto err;
+ if (NILP (AREF (val, LGLYPH_IX_CHAR)))
+ break;
+ CHECK_FIXNAT (AREF (val, LGLYPH_IX_FROM));
+ CHECK_FIXNAT (AREF (val, LGLYPH_IX_TO));
+ CHECK_CHARACTER (AREF (val, LGLYPH_IX_CHAR));
+ if (!NILP (AREF (val, LGLYPH_IX_CODE)))
+ CHECK_FIXNAT (AREF (val, LGLYPH_IX_CODE));
+ if (!NILP (AREF (val, LGLYPH_IX_WIDTH)))
+ CHECK_FIXNAT (AREF (val, LGLYPH_IX_WIDTH));
+ if (!NILP (AREF (val, LGLYPH_IX_ADJUSTMENT)))
+ {
+ val = AREF (val, LGLYPH_IX_ADJUSTMENT);
+ CHECK_VECTOR (val);
+ if (ASIZE (val) < 3)
+ goto err;
+ for (j = 0; j < 3; j++)
+ CHECK_FIXNUM (AREF (val, j));
+ }
+ }
+ return i;
+ err:
+ error ("Invalid glyph-string format");
+ return -1;
+}
+
+static void
+check_otf_features (Lisp_Object otf_features)
+{
+ Lisp_Object val;
+
+ CHECK_CONS (otf_features);
+ CHECK_SYMBOL (XCAR (otf_features));
+ otf_features = XCDR (otf_features);
+ CHECK_CONS (otf_features);
+ CHECK_SYMBOL (XCAR (otf_features));
+ otf_features = XCDR (otf_features);
+ for (val = Fcar (otf_features); CONSP (val); val = XCDR (val))
+ {
+ CHECK_SYMBOL (XCAR (val));
+ if (SBYTES (SYMBOL_NAME (XCAR (val))) > 4)
+ error ("Invalid OTF GSUB feature: %s",
+ SDATA (SYMBOL_NAME (XCAR (val))));
+ }
+ otf_features = XCDR (otf_features);
+ for (val = Fcar (otf_features); CONSP (val); val = XCDR (val))
+ {
+ CHECK_SYMBOL (XCAR (val));
+ if (SBYTES (SYMBOL_NAME (XCAR (val))) > 4)
+ error ("Invalid OTF GPOS feature: %s",
+ SDATA (SYMBOL_NAME (XCAR (val))));
+ }
+}
+
+#ifdef HAVE_LIBOTF
+#include <otf.h>
+
+Lisp_Object otf_list;
+
+static Lisp_Object
+otf_tag_symbol (OTF_Tag tag)
+{
+ char name[5];
+
+ OTF_tag_name (tag, name);
+ return Fintern (make_unibyte_string (name, 4), Qnil);
+}
+
+static OTF *
+otf_open (Lisp_Object file)
+{
+ Lisp_Object val = Fassoc (file, otf_list, Qnil);
+ OTF *otf;
+
+ if (! NILP (val))
+ otf = xmint_pointer (XCDR (val));
+ else
+ {
+ otf = STRINGP (file) ? OTF_open (SSDATA (file)) : NULL;
+ val = make_mint_ptr (otf);
+ otf_list = Fcons (Fcons (file, val), otf_list);
+ }
+ return otf;
+}
+
+
+/* Return a list describing which scripts/languages FONT supports by
+ which GSUB/GPOS features of OpenType tables. See the comment of
+ (struct font_driver).otf_capability. */
+
+Lisp_Object
+font_otf_capability (struct font *font)
+{
+ OTF *otf;
+ Lisp_Object capability = Fcons (Qnil, Qnil);
+ int i;
+
+ otf = otf_open (font->props[FONT_FILE_INDEX]);
+ if (! otf)
+ return Qnil;
+ for (i = 0; i < 2; i++)
+ {
+ OTF_GSUB_GPOS *gsub_gpos;
+ Lisp_Object script_list = Qnil;
+ int j;
+
+ if (OTF_get_features (otf, i == 0) < 0)
+ continue;
+ gsub_gpos = i == 0 ? otf->gsub : otf->gpos;
+ for (j = gsub_gpos->ScriptList.ScriptCount - 1; j >= 0; j--)
+ {
+ OTF_Script *script = gsub_gpos->ScriptList.Script + j;
+ Lisp_Object langsys_list = Qnil;
+ Lisp_Object script_tag = otf_tag_symbol (script->ScriptTag);
+ int k;
+
+ for (k = script->LangSysCount; k >= 0; k--)
+ {
+ OTF_LangSys *langsys;
+ Lisp_Object feature_list = Qnil;
+ Lisp_Object langsys_tag;
+ int l;
+
+ if (k == script->LangSysCount)
+ {
+ langsys = &script->DefaultLangSys;
+ langsys_tag = Qnil;
+ }
+ else
+ {
+ langsys = script->LangSys + k;
+ langsys_tag
+ = otf_tag_symbol (script->LangSysRecord[k].LangSysTag);
+ }
+ for (l = langsys->FeatureCount - 1; l >= 0; l--)
+ {
+ OTF_Feature *feature
+ = gsub_gpos->FeatureList.Feature + langsys->FeatureIndex[l];
+ Lisp_Object feature_tag
+ = otf_tag_symbol (feature->FeatureTag);
+
+ feature_list = Fcons (feature_tag, feature_list);
+ }
+ langsys_list = Fcons (Fcons (langsys_tag, feature_list),
+ langsys_list);
+ }
+ script_list = Fcons (Fcons (script_tag, langsys_list),
+ script_list);
+ }
+
+ if (i == 0)
+ XSETCAR (capability, script_list);
+ else
+ XSETCDR (capability, script_list);
+ }
+
+ return capability;
+}
+
+/* Parse OTF features in SPEC and write a proper features spec string
+ in FEATURES for the call of OTF_drive_gsub/gpos (of libotf). It is
+ assured that the sufficient memory has already allocated for
+ FEATURES. */
+
+static void
+generate_otf_features (Lisp_Object spec, char *features)
+{
+ Lisp_Object val;
+ char *p;
+ bool asterisk;
+
+ p = features;
+ *p = '\0';
+ for (asterisk = 0; CONSP (spec); spec = XCDR (spec))
+ {
+ val = XCAR (spec);
+ CHECK_SYMBOL (val);
+ if (p > features)
+ *p++ = ',';
+ if (SREF (SYMBOL_NAME (val), 0) == '*')
+ {
+ asterisk = 1;
+ *p++ = '*';
+ }
+ else if (! asterisk)
+ {
+ val = SYMBOL_NAME (val);
+ p += esprintf (p, "%s", SDATA (val));
+ }
+ else
+ {
+ val = SYMBOL_NAME (val);
+ p += esprintf (p, "~%s", SDATA (val));
+ }
+ }
+ if (CONSP (spec))
+ error ("OTF spec too long");
+}
+
+Lisp_Object
+font_otf_DeviceTable (OTF_DeviceTable *device_table)
+{
+ int len = device_table->StartSize - device_table->EndSize + 1;
+
+ return Fcons (make_fixnum (len),
+ make_unibyte_string (device_table->DeltaValue, len));
+}
+
+Lisp_Object
+font_otf_ValueRecord (int value_format, OTF_ValueRecord *value_record)
+{
+ Lisp_Object val = make_nil_vector (8);
+
+ if (value_format & OTF_XPlacement)
+ ASET (val, 0, make_fixnum (value_record->XPlacement));
+ if (value_format & OTF_YPlacement)
+ ASET (val, 1, make_fixnum (value_record->YPlacement));
+ if (value_format & OTF_XAdvance)
+ ASET (val, 2, make_fixnum (value_record->XAdvance));
+ if (value_format & OTF_YAdvance)
+ ASET (val, 3, make_fixnum (value_record->YAdvance));
+ if (value_format & OTF_XPlaDevice)
+ ASET (val, 4, font_otf_DeviceTable (&value_record->XPlaDevice));
+ if (value_format & OTF_YPlaDevice)
+ ASET (val, 4, font_otf_DeviceTable (&value_record->YPlaDevice));
+ if (value_format & OTF_XAdvDevice)
+ ASET (val, 4, font_otf_DeviceTable (&value_record->XAdvDevice));
+ if (value_format & OTF_YAdvDevice)
+ ASET (val, 4, font_otf_DeviceTable (&value_record->YAdvDevice));
+ return val;
+}
+
+Lisp_Object
+font_otf_Anchor (OTF_Anchor *anchor)
+{
+ Lisp_Object val = make_nil_vector (anchor->AnchorFormat + 1);
+ ASET (val, 0, make_fixnum (anchor->XCoordinate));
+ ASET (val, 1, make_fixnum (anchor->YCoordinate));
+ if (anchor->AnchorFormat == 2)
+ ASET (val, 2, make_fixnum (anchor->f.f1.AnchorPoint));
+ else
+ {
+ ASET (val, 3, font_otf_DeviceTable (&anchor->f.f2.XDeviceTable));
+ ASET (val, 4, font_otf_DeviceTable (&anchor->f.f2.YDeviceTable));
+ }
+ return val;
+}
+#endif /* HAVE_LIBOTF */
+#endif /* 0 */
+
\f
/* Font sorting. */
return Fcons (font_object, INT_TO_INTEGER (code));
}
+#if 0
+
+DEFUN ("font-drive-otf", Ffont_drive_otf, Sfont_drive_otf, 6, 6, 0,
+ doc: /* Apply OpenType features on glyph-string GSTRING-IN.
+OTF-FEATURES specifies which features to apply in this format:
+ (SCRIPT LANGSYS GSUB GPOS)
+where
+ SCRIPT is a symbol specifying a script tag of OpenType,
+ LANGSYS is a symbol specifying a langsys tag of OpenType,
+ GSUB and GPOS, if non-nil, are lists of symbols specifying feature tags.
+
+If LANGSYS is nil, the default langsys is selected.
+
+The features are applied in the order they appear in the list. The
+symbol `*' means to apply all available features not present in this
+list, and the remaining features are ignored. For instance, (vatu
+pstf * haln) is to apply vatu and pstf in this order, then to apply
+all available features other than vatu, pstf, and haln.
+
+The features are applied to the glyphs in the range FROM and TO of
+the glyph-string GSTRING-IN.
+
+If some feature is actually applicable, the resulting glyphs are
+produced in the glyph-string GSTRING-OUT from the index INDEX. In
+this case, the value is the number of produced glyphs.
+
+If no feature is applicable, no glyph is produced in GSTRING-OUT, and
+the value is 0.
+
+If GSTRING-OUT is too short to hold produced glyphs, no glyphs are
+produced in GSTRING-OUT, and the value is nil.
+
+See the documentation of `composition-get-gstring' for the format of
+glyph-string. */)
+ (Lisp_Object otf_features, Lisp_Object gstring_in, Lisp_Object from, Lisp_Object to, Lisp_Object gstring_out, Lisp_Object index)
+{
+ Lisp_Object font_object = LGSTRING_FONT (gstring_in);
+ Lisp_Object val;
+ struct font *font;
+ int len, num;
+
+ check_otf_features (otf_features);
+ CHECK_FONT_OBJECT (font_object);
+ font = XFONT_OBJECT (font_object);
+ if (! font->driver->otf_drive)
+ error ("Font backend %s can't drive OpenType GSUB table",
+ SDATA (SYMBOL_NAME (font->driver->type)));
+ CHECK_CONS (otf_features);
+ CHECK_SYMBOL (XCAR (otf_features));
+ val = XCDR (otf_features);
+ CHECK_SYMBOL (XCAR (val));
+ val = XCDR (otf_features);
+ if (! NILP (val))
+ CHECK_CONS (val);
+ len = check_gstring (gstring_in);
+ CHECK_VECTOR (gstring_out);
+ CHECK_FIXNAT (from);
+ CHECK_FIXNAT (to);
+ CHECK_FIXNAT (index);
+
+ if (XFIXNUM (from) >= XFIXNUM (to) || XFIXNUM (to) > len)
+ args_out_of_range_3 (from, to, make_fixnum (len));
+ if (XFIXNUM (index) >= ASIZE (gstring_out))
+ args_out_of_range (index, make_fixnum (ASIZE (gstring_out)));
+ num = font->driver->otf_drive (font, otf_features,
+ gstring_in, XFIXNUM (from), XFIXNUM (to),
+ gstring_out, XFIXNUM (index), 0);
+ if (num < 0)
+ return Qnil;
+ return make_fixnum (num);
+}
+
+DEFUN ("font-otf-alternates", Ffont_otf_alternates, Sfont_otf_alternates,
+ 3, 3, 0,
+ doc: /* Return a list of alternate glyphs of CHARACTER in FONT-OBJECT.
+OTF-FEATURES specifies which features of the font FONT-OBJECT to apply
+in this format:
+ (SCRIPT LANGSYS FEATURE ...)
+See the documentation of `font-drive-otf' for more detail.
+
+The value is a list of cons cells of the format (GLYPH-ID . CHARACTER),
+where GLYPH-ID is a glyph index of the font, and CHARACTER is a
+character code corresponding to the glyph or nil if there's no
+corresponding character. */)
+ (Lisp_Object font_object, Lisp_Object character, Lisp_Object otf_features)
+{
+ struct font *font = CHECK_FONT_GET_OBJECT (font_object);
+ Lisp_Object gstring_in, gstring_out, g;
+ Lisp_Object alternates;
+ int i, num;
+
+ if (! font->driver->otf_drive)
+ error ("Font backend %s can't drive OpenType GSUB table",
+ SDATA (SYMBOL_NAME (font->driver->type)));
+ CHECK_CHARACTER (character);
+ CHECK_CONS (otf_features);
+
+ gstring_in = Ffont_make_gstring (font_object, make_fixnum (1));
+ g = LGSTRING_GLYPH (gstring_in, 0);
+ LGLYPH_SET_CHAR (g, XFIXNUM (character));
+ gstring_out = Ffont_make_gstring (font_object, make_fixnum (10));
+ while ((num = font->driver->otf_drive (font, otf_features, gstring_in, 0, 1,
+ gstring_out, 0, 1)) < 0)
+ gstring_out = Ffont_make_gstring (font_object,
+ make_fixnum (ASIZE (gstring_out) * 2));
+ alternates = Qnil;
+ for (i = 0; i < num; i++)
+ {
+ Lisp_Object g = LGSTRING_GLYPH (gstring_out, i);
+ int c = LGLYPH_CHAR (g);
+ unsigned code = LGLYPH_CODE (g);
+
+ alternates = Fcons (Fcons (make_fixnum (code),
+ c > 0 ? make_fixnum (c) : Qnil),
+ alternates);
+ }
+ return Fnreverse (alternates);
+}
+#endif /* 0 */
+
#ifdef FONT_DEBUG
DEFUN ("open-font", Fopen_font, Sopen_font, 1, 3, 0,
return font_at (-1, XFIXNUM (position), NULL, w, string);
}
+#if 0
+DEFUN ("draw-string", Fdraw_string, Sdraw_string, 2, 2, 0,
+ doc: /* Draw STRING by FONT-OBJECT on the top left corner of the current frame.
+The value is a number of glyphs drawn.
+Type C-l to recover what previously shown. */)
+ (Lisp_Object font_object, Lisp_Object string)
+{
+ Lisp_Object frame = selected_frame;
+ struct frame *f = XFRAME (frame);
+ struct font *font;
+ struct face *face;
+ int i, len, width;
+ unsigned *code;
+
+ CHECK_FONT_GET_OBJECT (font_object, font);
+ CHECK_STRING (string);
+ len = SCHARS (string);
+ code = alloca (sizeof (unsigned) * len);
+ for (i = 0; i < len; i++)
+ {
+ Lisp_Object ch = Faref (string, make_fixnum (i));
+ Lisp_Object val;
+ int c = XFIXNUM (ch);
+
+ code[i] = font->driver->encode_char (font, c);
+ if (code[i] == FONT_INVALID_CODE)
+ break;
+ }
+ face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
+ face->fontp = font;
+ if (font->driver->prepare_face)
+ font->driver->prepare_face (f, face);
+ width = font->driver->text_extents (font, code, i, NULL);
+ len = font->driver->draw_text (f, face, 0, font->ascent, code, i, width);
+ if (font->driver->done_face)
+ font->driver->done_face (f, face);
+ face->fontp = NULL;
+ return make_fixnum (len);
+}
+#endif
+
DEFUN ("frame-font-cache", Fframe_font_cache, Sframe_font_cache, 0, 1, 0,
doc: /* Return FRAME's font cache. Mainly used for debugging.
If FRAME is omitted or nil, use the selected frame. */)
Vfont_log_deferred = make_nil_vector (3);
staticpro (&Vfont_log_deferred);
+#if 0
+#ifdef HAVE_LIBOTF
+ staticpro (&otf_list);
+ otf_list = Qnil;
+#endif /* HAVE_LIBOTF */
+#endif /* 0 */
+
defsubr (&Sfontp);
defsubr (&Sfont_spec);
defsubr (&Sfont_get);
defsubr (&Sfont_shape_gstring);
defsubr (&Sfont_variation_glyphs);
defsubr (&Sinternal_char_font);
+#if 0
+ defsubr (&Sfont_drive_otf);
+ defsubr (&Sfont_otf_alternates);
+#endif /* 0 */
#ifdef FONT_DEBUG
defsubr (&Sopen_font);
defsubr (&Sfont_get_glyphs);
defsubr (&Sfont_match_p);
defsubr (&Sfont_at);
+#if 0
+ defsubr (&Sdraw_string);
+#endif
defsubr (&Sframe_font_cache);
#endif /* FONT_DEBUG */
#ifdef HAVE_WINDOW_SYSTEM
projects / emacs.git / commitdiff