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Commit 9331887d authored by Kenichi Handa's avatar Kenichi Handa
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(POINT_TO_PIXEL): Don't divice POINT by 10. 

(QCspacing, QCdpi): New variables.
(syms_of_font): Initialize them.
(font_pixel_size): New function.
(font_put_extra): New function.
(font_parse_xlfd): Fix handling of font size.  Add QCdpi property
in FONT_EXTRA.
(font_parse_fcname): Handle enumenrated values (e.g. bold).  Fix
handling font size.  Add QCname property that contains only
unknown properties.
(font_score): Change argument.  Caller changed.  Pay attention to
FONT_PIXEL_SIZE_QUANTUM.
(font_sort_entites): Fix handling of font size.
(font_list_entities): Likewise.
(font_find_for_lface): Likewise.
(font_open_for_lface): Likewise.
(font_open_by_name): Likewise.
(Ffont_spec): Add QCname property that contains only unknown
properties.
parent 63565713
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Showing with 230 additions and 111 deletions
src/font.c
View file @ 9331887d
......@@ -64,10 +64,12 @@ Lisp_Object Qiso8859_1, Qiso10646_1, Qunicode_bmp;
/* Number of pt per inch (from the TeXbook). */
#define PT_PER_INCH 72.27
/* Return a pixel size corresponding to POINT size (1/10 pt unit) on
resolution RESY. */
#define POINT_TO_PIXEL(POINT, RESY) ((POINT) * (RESY) / PT_PER_INCH / 10 + 0.5)
/* Return a pixel size (integer) corresponding to POINT size (double)
on resolution RESY. */
#define POINT_TO_PIXEL(POINT, RESY) ((POINT) * (RESY) / PT_PER_INCH + 0.5)
/* Return a point size (double) corresponding to POINT size (integer)
on resolution RESY. */
#define PIXEL_TO_POINT(PIXEL, RESY) ((PIXEL) * PT_PER_INCH * 10 / (RESY) + 0.5)
/* Special string of zero length. It is used to specify a NULL name
......@@ -99,7 +101,7 @@ static Lisp_Object font_family_alist;
extern Lisp_Object QCtype, QCfamily, QCweight, QCslant, QCwidth, QCsize, QCname;
Lisp_Object QCfoundry, QCadstyle, QCregistry, QCextra;
/* Symbols representing keys of font extra info. */
Lisp_Object QCotf, QClanguage, QCscript;
Lisp_Object QCspacing, QCdpi, QCotf, QClanguage, QCscript;
/* List of all font drivers. All font-backends (XXXfont.c) call
add_font_driver in syms_of_XXXfont to register the font-driver
......@@ -114,6 +116,33 @@ static Lisp_Object font_open_entity P_ ((FRAME_PTR, Lisp_Object, int));
/* Number of registered font drivers. */
static int num_font_drivers;
/* Return a pixel size of font-spec SPEC on frame F. */
static int
font_pixel_size (f, spec)
FRAME_PTR f;
Lisp_Object spec;
{
Lisp_Object size = AREF (spec, FONT_SIZE_INDEX);
double point_size;
int pixel_size, dpi;
Lisp_Object extra, val;
if (INTEGERP (size))
return XINT (size);
if (NILP (size))
return 0;
point_size = XFLOAT_DATA (size);
extra = AREF (spec, FONT_EXTRA_INDEX);
val = assq_no_quit (extra, QCdpi);
if (CONSP (val) && INTEGERP (XCDR (val)))
dpi = XINT (XCDR (val));
else
dpi = f->resy;
pixel_size = POINT_TO_PIXEL (point_size, dpi);
return pixel_size;
}
/* Return a numeric value corresponding to PROP's NAME (symbol). If
NAME is not registered in font_style_table, return Qnil. PROP must
be one of FONT_{WEIGHT|SLANT|SWIDTH}_INDEX. */
......@@ -345,6 +374,26 @@ font_prop_validate (spec)
return spec;
}
static void
font_put_extra (font, prop, val, force)
Lisp_Object font, prop, val;
int force;
{
Lisp_Object extra = AREF (font, FONT_EXTRA_INDEX);
Lisp_Object slot = (NILP (extra) ? Qnil : Fassq (prop, extra));
if (NILP (slot))
{
extra = Fcons (Fcons (prop, val), extra);
ASET (font, FONT_EXTRA_INDEX, extra);
return;
}
if (! NILP (XCDR (slot)) && ! force)
return;
XSETCDR (slot, val);
return;
}
/* Font name parser and unparser */
......@@ -635,8 +684,19 @@ font_expand_wildcards (field, n)
}
/* Parse NAME (null terminated) as XLFD and store information in FONT
(font-spec or font-entity). See font_parse_name for more
detail. */
(font-spec or font-entity). Size property of FONT is set as
follows:
specified XLFD fields FONT property
--------------------- -------------
PIXEL_SIZE PIXEL_SIZE (Lisp integer)
POINT_SIZE and RESY calculated pixel size (Lisp integer)
POINT_SIZE POINT_SIZE/10 (Lisp float)
If NAME is successfully parsed, return 2 (size is specified), 1
(size is not specified), or 0 (size is not specified but resolution
is specified). Otherwise return -1.
See font_parse_name for more detail. */
int
font_parse_xlfd (name, font, merge)
......@@ -690,6 +750,8 @@ font_parse_xlfd (name, font, merge)
}
else if (i == XLFD_POINT_INDEX)
{
/* If PIXEL_SIZE is specified, we don't have to
calculate POINT_SIZE. */
if (pixel_size < 0)
{
if (isdigit (*name))
......@@ -707,6 +769,8 @@ font_parse_xlfd (name, font, merge)
else if (i == XLFD_RESY_INDEX)
{
/* Stuff RESY, SPACING, and AVGWIDTH. */
/* If PIXEL_SIZE is specified, we don't have to
calculate RESY. */
if (pixel_size < 0 && isdigit (*name))
resy = atoi (name);
for (p++; *p != '-'; p++);
......@@ -776,10 +840,15 @@ font_parse_xlfd (name, font, merge)
return -1;
if (! NILP (f[XLFD_PIXEL_INDEX]))
pixel_size = XINT (f[XLFD_PIXEL_INDEX]);
if (! NILP (f[XLFD_POINT_INDEX]))
point_size = XINT (f[XLFD_POINT_INDEX]);
if (! NILP (f[XLFD_RESY_INDEX]))
resy = XINT (f[XLFD_RESY_INDEX]);
/* If PIXEL_SIZE is specified, we don't have to
calculate POINT_SIZE and RESY. */
if (pixel_size < 0)
{
if (! NILP (f[XLFD_POINT_INDEX]))
point_size = XINT (f[XLFD_POINT_INDEX]);
if (! NILP (f[XLFD_RESY_INDEX]))
resy = XINT (f[XLFD_RESY_INDEX]);
}
if (! NILP (f[XLFD_AVGWIDTH_INDEX]))
avgwidth = XINT (f[XLFD_AVGWIDTH_INDEX]);
if (NILP (f[XLFD_REGISTRY_INDEX]))
......@@ -828,22 +897,16 @@ font_parse_xlfd (name, font, merge)
if (pixel_size >= 0)
ASET (font, FONT_SIZE_INDEX, make_number (pixel_size));
else if (point_size >= 0)
{
if (resy > 0)
{
pixel_size = POINT_TO_PIXEL (point_size, resy);
ASET (font, FONT_SIZE_INDEX, make_number (pixel_size));
}
else
{
ASET (font, FONT_SIZE_INDEX, make_float (point_size / 10));
}
}
ASET (font, FONT_SIZE_INDEX, make_float (point_size / 10));
}
if (FONT_ENTITY_P (font)
&& EQ (AREF (font, FONT_TYPE_INDEX), Qx))
ASET (font, FONT_EXTRA_INDEX, f[XLFD_RESY_INDEX]);
if (FONT_ENTITY_P (font))
{
if (EQ (AREF (font, FONT_TYPE_INDEX), Qx))
ASET (font, FONT_EXTRA_INDEX, f[XLFD_RESY_INDEX]);
}
else if (resy >= 0)
font_put_extra (font, QCdpi, make_number (resy), merge);
return (avgwidth > 0 ? 2 : resy == 0);
}
......@@ -930,7 +993,7 @@ font_unparse_xlfd (font, pixel_size, name, nbytes)
{
i = XINT (val);
if (i > 0)
len += sprintf (work, "%d", i) + 1;
len += sprintf (work, "%d-*", i) + 1;
else /* i == 0 */
len += sprintf (work, "%d-*", pixel_size) + 1;
pixel_point = work;
......@@ -972,8 +1035,8 @@ font_unparse_xlfd (font, pixel_size, name, nbytes)
}
/* Parse NAME (null terminated) as Fonconfig's name format and store
information in FONT (font-spec or font-entity). See
font_parse_name for more detail. */
information in FONT (font-spec or font-entity). If NAME is
successfully parsed, return 0. Otherwise return -1. */
int
font_parse_fcname (name, font, merge)
......@@ -986,6 +1049,8 @@ font_parse_fcname (name, font, merge)
double point_size = 0;
int pixel_size = 0;
Lisp_Object extra = AREF (font, FONT_EXTRA_INDEX);
int len = strlen (name);
char *copy;
/* It is assured that (name[0] && name[0] != '-'). */
if (name[0] == ':')
......@@ -1009,57 +1074,114 @@ font_parse_fcname (name, font, merge)
if (! merge || NILP (AREF (font, FONT_FAMILY_INDEX)))
ASET (font, FONT_FAMILY_INDEX, family);
}
len -= p0 - name;
copy = alloca (len + 1);
if (! copy)
return -1;
name = copy;
/* Now parse ":KEY=VAL" patterns. Store known keys and values in
extra, copy unknown ones to COPY. */
while (*p0)
{
Lisp_Object key, val;
enum font_property_index prop;
p1 = index (name, '=');
if (! p1)
return -1;
if (memcmp (p0 + 1, "pixelsize=", 10) == 0)
prop = FONT_SIZE_INDEX;
else
{
key = intern_font_field (p0, p1 - p0);
prop = check_font_prop_name (key);
}
p0 = p1 + 1;
for (p1 = p0; *p1 && *p1 != ':'; p1++);
if (prop == FONT_SIZE_INDEX)
for (p1 = p0 + 1; islower (*p1); p1++);
if (*p1 != '=')
{
pixel_size = atoi (p0);
/* Must be an enumerated value. */
val = intern_font_field (p0 + 1, p1 - p0 - 1);
if (memcmp (p0 + 1, "light", 5) == 0
|| memcmp (p0 + 1, "medium", 6) == 0
|| memcmp (p0 + 1, "demibold", 8) == 0
|| memcmp (p0 + 1, "bold", 4) == 0
|| memcmp (p0 + 1, "black", 5) == 0)
{
if (! merge || NILP (AREF (font, FONT_WEIGHT_INDEX)))
ASET (font, FONT_WEIGHT_INDEX,
prop_name_to_numeric (FONT_WEIGHT_INDEX, val));
}
else if (memcmp (p0 + 1, "roman", 5) == 0
|| memcmp (p0 + 1, "italic", 6) == 0
|| memcmp (p0 + 1, "oblique", 7) == 0)
{
if (! merge || NILP (AREF (font, FONT_SLANT_INDEX)))
ASET (font, FONT_SLANT_INDEX,
prop_name_to_numeric (FONT_SLANT_INDEX, val));
}
else if (memcmp (p0 + 1, "charcell", 8) == 0
|| memcmp (p0 + 1, "mono", 4) == 0
|| memcmp (p0 + 1, "proportional", 12) == 0)
{
font_put_extra (font, QCspacing,
p0[1] == 'c' ? make_number (FONT_SPACING_CHARCELL)
: p0[1] == 'm' ? make_number (FONT_SPACING_MONO)
: make_number (FONT_SPACING_PROPORTIONAL),
merge);
}
else
{
/* unknown key */
bcopy (p0, copy, p1 - p0);
copy += p1 - p0;
}
}
else
{
val = intern_font_field (p0, p1 - p0);
if (prop < FONT_EXTRA_INDEX)
if (memcmp (p0 + 1, "pixelsize=", 10) == 0)
prop = FONT_SIZE_INDEX;
else
{
key = intern_font_field (p0, p1 - p0);
prop = check_font_prop_name (key);
}
p0 = p1 + 1;
for (p1 = p0; *p1 && *p1 != ':'; p1++);
if (prop == FONT_SIZE_INDEX)
{
pixel_size = atoi (p0);
}
else if (prop < FONT_EXTRA_INDEX)
{
if (! merge || NILP (AREF (font, prop)))
{
val = font_property_table[prop].validater (prop, val);
val = intern_font_field (p0, p1 - p0);
if (prop >= FONT_WEIGHT_INDEX && prop <= FONT_WIDTH_INDEX)
val = font_property_table[prop].validater (prop, val);
if (! EQ (val, Qerror))
ASET (font, prop, val);
}
}
else if (EQ (key, QCdpi))
{
if (INTEGERP (val))
font_put_extra (font, key, val, merge);
}
else
{
if (! merge || NILP (Fplist_get (extra, key)))
extra = Fplist_put (extra, key, val);
/* unknown key */
bcopy (p0, copy, p1 - p0);
copy += p1 - p0;
}
}
p0 = p1;
}
ASET (font, FONT_EXTRA_INDEX, extra);
if (! merge || NILP (AREF (font, FONT_SIZE_INDEX)))
{
if (point_size > 0)
ASET (font, FONT_SIZE_INDEX, make_float (point_size));
else if (pixel_size > 0)
if (pixel_size > 0)
ASET (font, FONT_SIZE_INDEX, make_number (pixel_size));
else if (point_size > 0)
ASET (font, FONT_SIZE_INDEX, make_float (point_size));
}
if (name < copy)
font_put_extra (font, QCname, make_unibyte_string (name, copy - name),
merge);
return (NILP (AREF (font, FONT_SIZE_INDEX)) ? 1 : 2);
return 0;
}
/* Store fontconfig's font name of FONT (font-spec or font-entity) in
......@@ -1135,8 +1257,7 @@ font_unparse_fcname (font, pixel_size, name, nbytes)
/* Parse NAME (null terminated) and store information in FONT
(font-spec or font-entity). If NAME is successfully parsed, return
2 (size is specified), 1 (size is not specified), or 0 (size is not
specified but resolution is specified). Otherwise return -1.
a non-negative value. Otherwise return -1.
If NAME is XLFD and FONT is a font-entity, store
RESY-SPACING-AVWIDTH information as a symbol in FONT_EXTRA_INDEX.
......@@ -1734,7 +1855,7 @@ font_gstring_produce (old, from, to, new, idx, code, n)
/* Font sorting */
static unsigned font_score P_ ((Lisp_Object, Lisp_Object));
static unsigned font_score P_ ((Lisp_Object, Lisp_Object *));
static int font_compare P_ ((const void *, const void *));
static Lisp_Object font_sort_entites P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object));
......@@ -1753,43 +1874,45 @@ static Lisp_Object font_sort_entites P_ ((Lisp_Object, Lisp_Object,
property in a score. */
static int sort_shift_bits[FONT_SIZE_INDEX + 1];
/* Score font-entity ENTITY against font-spec SPEC. The return value
indicates how different ENTITY is compared with SPEC. */
/* Score font-entity ENTITY against properties of font-spec SPEC_PROP.
The return value indicates how different ENTITY is compared with
SPEC_PROP. */
static unsigned
font_score (entity, spec)
Lisp_Object entity, spec;
font_score (entity, spec_prop)
Lisp_Object entity, *spec_prop;
{
unsigned score = 0;
int i;
/* Score atomic fields. Maximum difference is 1. */
/* Score four atomic fields. Maximum difference is 1. */
for (i = FONT_FOUNDRY_INDEX; i <= FONT_REGISTRY_INDEX; i++)
{
Lisp_Object val = AREF (spec, i);
if (! NILP (val)
&& ! EQ (val, AREF (entity, i)))
score |= 1 << sort_shift_bits[i];
}
if (! NILP (spec_prop[i])
&& ! EQ (spec_prop[i], AREF (entity, i)))
score |= 1 << sort_shift_bits[i];
/* Score numeric fields. Maximum difference is 127. */
/* Score four numeric fields. Maximum difference is 127. */
for (i = FONT_WEIGHT_INDEX; i <= FONT_SIZE_INDEX; i++)
{
Lisp_Object spec_val = AREF (spec, i);
Lisp_Object entity_val = AREF (entity, i);
if (! NILP (spec_val) && ! EQ (spec_val, entity_val))
if (! NILP (spec_prop[i]) && ! EQ (spec_prop[i], entity_val))
{
if (! INTEGERP (entity_val))
score |= 127 << sort_shift_bits[i];
else if (i < FONT_SIZE_INDEX
|| XINT (entity_val) != 0)
else
{
int diff = XINT (entity_val) - XINT (spec_val);
int diff = XINT (entity_val) - XINT (spec_prop[i]);
if (diff < 0)
diff = - diff;
score |= min (diff, 127) << sort_shift_bits[i];
if (i == FONT_SIZE_INDEX)
{
if (XINT (entity_val) > 0
&& diff > FONT_PIXEL_SIZE_QUANTUM)
score |= min (diff, 127) << sort_shift_bits[i];
}
else
score |= min (diff, 127) << sort_shift_bits[i];
}
}
}
......@@ -1819,58 +1942,46 @@ struct font_sort_data
/* Sort font-entities in vector VEC by closeness to font-spec PREFER.
If PREFER specifies a point-size, calculate the corresponding
pixel-size from the Y-resolution of FRAME before sorting. If SPEC
is not nil, it is a font-spec to get the font-entities in VEC. */
pixel-size from QCdpi property of PREFER or from the Y-resolution
of FRAME before sorting. If SPEC is not nil, it is a font-spec to
get the font-entities in VEC. */
static Lisp_Object
font_sort_entites (vec, prefer, frame, spec)
Lisp_Object vec, prefer, frame, spec;
{
Lisp_Object size;
Lisp_Object prefer_prop[FONT_SPEC_MAX];
int len, i;
struct font_sort_data *data;
int prefer_is_copy = 0;
USE_SAFE_ALLOCA;
len = ASIZE (vec);
if (len <= 1)
return vec;
size = AREF (spec, FONT_SIZE_INDEX);
if (FLOATP (size))
{
double point_size = XFLOAT_DATA (size) * 10;
int pixel_size = POINT_TO_PIXEL (point_size, XFRAME (frame)->resy);
prefer = Fcopy_sequence (prefer);
ASET (prefer, FONT_SIZE_INDEX, make_number (pixel_size));
prefer_is_copy = 1;
}
for (i = FONT_FOUNDRY_INDEX; i <= FONT_SIZE_INDEX; i++)
prefer_prop[i] = AREF (prefer, i);
if (! NILP (spec))
{
/* As it is assured that all fonts in VEC match with SPEC, we
should ignore properties specified in SPEC. So, set the
corresponding properties in PREFER nil. */
corresponding properties in PREFER_PROP to nil. */
for (i = FONT_WEIGHT_INDEX; i <= FONT_SIZE_INDEX; i++)
if (! NILP (AREF (spec, i)) && ! NILP (AREF (prefer, i)))
break;
if (i <= FONT_SIZE_INDEX)
{
if (! prefer_is_copy)
prefer = Fcopy_sequence (prefer);
for (; i <= FONT_SIZE_INDEX; i++)
if (! NILP (AREF (spec, i)) && ! NILP (AREF (prefer, i)))
ASET (prefer, i, Qnil);
}
if (! NILP (AREF (spec, i)))
prefer_prop[i++] = Qnil;
}
if (FLOATP (prefer_prop[FONT_SIZE_INDEX]))
prefer_prop[FONT_SIZE_INDEX]
= make_number (font_pixel_size (XFRAME (frame), prefer));
/* Scoring and sorting. */
SAFE_ALLOCA (data, struct font_sort_data *, (sizeof *data) * len);
for (i = 0; i < len; i++)
{
data[i].entity = AREF (vec, i);
data[i].score = font_score (data[i].entity, prefer);
data[i].score = font_score (data[i].entity, prefer_prop);
}
qsort (data, len, sizeof *data, font_compare);
for (i = 0; i < len; i++)
......@@ -2004,7 +2115,7 @@ font_list_entities (frame, spec)
}
size = AREF (spec, FONT_SIZE_INDEX);
if (FLOATP (size))
ASET (spec, FONT_SIZE_INDEX, POINT_TO_PIXEL (size * 10, f->resy));
ASET (spec, FONT_SIZE_INDEX, make_number (font_pixel_size (f, spec)));
xassert (ASIZE (spec) == FONT_SPEC_MAX);
ftype = AREF (spec, FONT_TYPE_INDEX);
......@@ -2238,7 +2349,7 @@ font_find_for_lface (f, lface, spec)
if (ASIZE (entities) > 1)
{
Lisp_Object prefer = scratch_font_prefer, val;
int size;
double pt;
ASET (prefer, FONT_WEIGHT_INDEX,
font_prop_validate_style (FONT_WEIGHT_INDEX,
......@@ -2249,9 +2360,8 @@ font_find_for_lface (f, lface, spec)
ASET (prefer, FONT_WIDTH_INDEX,
font_prop_validate_style (FONT_WIDTH_INDEX,
lface[LFACE_SWIDTH_INDEX]));
val = lface[LFACE_HEIGHT_INDEX];
size = POINT_TO_PIXEL (XINT (val), f->resy);
ASET (prefer, FONT_SIZE_INDEX, make_number (size));
pt = XINT (lface[LFACE_HEIGHT_INDEX]);
ASET (prefer, FONT_SIZE_INDEX, make_float (pt / 10));
font_sort_entites (entities, prefer, frame, spec);
}
......@@ -2265,9 +2375,11 @@ font_open_for_lface (f, lface, entity)
Lisp_Object *lface;
Lisp_Object entity;
{
int pt = XINT (lface[LFACE_HEIGHT_INDEX]);
int size = POINT_TO_PIXEL (pt, f->resy);
double pt = XINT (lface[LFACE_HEIGHT_INDEX]);
int size;
pt /= 10;
size = POINT_TO_PIXEL (pt, f->resy);
return font_open_entity (f, entity, size);
}
......@@ -2356,7 +2468,7 @@ font_open_by_name (f, name)
pixel_size = XINT (size);
else /* FLOATP (size) */
{
double pt = XFLOAT_DATA (size) * 10;
double pt = XFLOAT_DATA (size);
pixel_size = POINT_TO_PIXEL (pt, f->resy);
size = make_number (pixel_size);
......@@ -2364,10 +2476,12 @@ font_open_by_name (f, name)
}
if (pixel_size == 0)
{
pixel_size = POINT_TO_PIXEL (120.0, f->resy);
pixel_size = POINT_TO_PIXEL (12.0, f->resy);
size = make_number (pixel_size);
}
ASET (prefer, FONT_SIZE_INDEX, size);
if (NILP (AREF (spec, FONT_REGISTRY_INDEX)))
ASET (spec, FONT_REGISTRY_INDEX, Qiso8859_1);
entities = Flist_fonts (spec, frame, make_number (1), prefer);
return (NILP (entities)
......@@ -2451,7 +2565,7 @@ usage: (font-spec &rest properties) */)
Lisp_Object *args;
{
Lisp_Object spec = Fmake_vector (make_number (FONT_SPEC_MAX), Qnil);
Lisp_Object extra = Qnil;
Lisp_Object extra = Qnil, name = Qnil;
int i;
for (i = 0; i < nargs; i += 2)
......@@ -2465,11 +2579,14 @@ usage: (font-spec &rest properties) */)
else
{
if (EQ (key, QCname))
font_parse_name ((char *) SDATA (val), spec, 0);
extra = Fcons (Fcons (key, val), extra);
name = val;
else
extra = Fcons (Fcons (key, val), extra);
}
}
ASET (spec, FONT_EXTRA_INDEX, extra);
if (STRINGP (name))
font_parse_name (SDATA (name), spec, 0);
return spec;
}
......@@ -3020,6 +3137,8 @@ syms_of_font ()
DEFSYM (QCfoundry, ":foundry");
DEFSYM (QCadstyle, ":adstyle");
DEFSYM (QCregistry, ":registry");
DEFSYM (QCspacing, ":spacing");
DEFSYM (QCdpi, ":dpi");
DEFSYM (QCextra, ":extra");
staticpro (&null_string);
......
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