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Kenichi Handa 2006-06-06 03:47:13 +00:00
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2571
src/font.c Normal file
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/* font.h -- Interface definition for font handling.
Copyright (C) 2006 Free Software Foundation, Inc.
Copyright (C) 2006
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs 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 2, or (at your option)
any later version.
GNU Emacs 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#ifndef EMACS_FONT_H
#define EMACS_FONT_H
#include "ccl.h"
/* We have three types of Lisp objects related to font.
FONT-SPEC
Vector (length FONT_SPEC_MAX) of font properties. Some
properties can be left unspecified (i.e. nil). Emacs asks
font-drivers to find a font by FONT-SPEC. A fontset entry
specifies requisite properties whereas a face specifies just
preferable properties. This object is fully modifiable by
Lisp.
FONT-ENTITY
Vector (length FONT_ENTITY_MAX) of fully specified font
properties that a font-driver returns upon a request of
FONT-SPEC.
Note: Only the method `list' of a font-driver can create this
object, and should never be modified by Lisp. In that sense,
it may be cleaner to implement it as a Lisp object of a new
type (e.g. struct Lisp_Font).
FONT-OBJECT
Lisp object of type Lisp_Misc_Save_Value encapsulating a
pointer to "struct font". This corresponds to an opened font.
Note: The note for FONT-ENTITY also applies to this.
*/
struct font_driver;
struct font;
/* An enumerator for each font property. This is used as an index to
the vector of FONT-SPEC and FONT-ENTITY.
Note: The order is important and should not be changed. */
enum font_property_index
{
/* FONT-TYPE is a symbol indicating a font backend; currently `x',
`xft', `ftx', `freetype' are available. For windows, we need
`bdf' and `windows'. For Mac OS X, we need `atm'. */
FONT_TYPE_INDEX,
/* FONT-FOUNDRY is a foundry name (symbol). */
FONT_FOUNDRY_INDEX,
/* FONT-FAMILY is a family name (symbol). */
FONT_FAMILY_INDEX,
/* FONT-ADSTYLE is an additional style name (symbol). */
FONT_ADSTYLE_INDEX,
/* FONT-REGISTRY is a combination of a charset-registry and
charset0encoding name (symbol). */
FONT_REGISTRY_INDEX,
/* FONT-WEIGHT is a numeric value of weight (e.g. medium, bold) of
the font. The value is what defined by FC_WEIGHT_* in
fontconfig. */
FONT_WEIGHT_INDEX,
/* FONT-SLANT is a numeric value of slant (e.g. r, i, o) of the
font. The value is what defined by FC_SLANT_* in
fontconfig plus 100. */
FONT_SLANT_INDEX,
/* FONT-WIDTH is a numeric value of setwidth (e.g. normal,
condensed) of the font. The value is what defined by
FC_WIDTH_* in fontconfig. */
FONT_WIDTH_INDEX,
/* FONT-SIZE is a size of the font. If integer, it is a pixel
size. For a font-spec, the value can be float specifying a
point size. For a font-entity, the value can be zero meaning
that the font is scalable. */
FONT_SIZE_INDEX,
/* In a font-spec, the value is an alist of extra information of a
font such as name, OpenType features, and language coverage.
In a font-entity, the value is an extra infomation for
identifying a font (font-driver dependent). */
FONT_EXTRA_INDEX, /* alist alist */
/* This value is the length of font-spec vector. */
FONT_SPEC_MAX,
/* The followings are used only for a font-entity. */
/* Frame on which the font is found. The value is nil if the font
can be opend on any frame. */
FONT_FRAME_INDEX = FONT_SPEC_MAX,
/* List of font-objects opened from the font-entity. */
FONT_OBJLIST_INDEX,
/* This value is the length of font-entity vector. */
FONT_ENTITY_MAX
};
extern Lisp_Object QCotf, QClanguage, QCscript;
extern Lisp_Object null_string;
extern Lisp_Object null_vector;
/* Structure for an opened font. We can safely cast this structure to
"struft font_info". */
struct font
{
struct font_info font;
/* From which font-entity the font is opened. */
Lisp_Object entity;
/* By which pixel size the font is opened. */
int pixel_size;
/* Font-driver for the font. */
struct font_driver *driver;
/* File name of the font, or NULL if the font is not associated with
a file. */
char *file_name;
/* Charset to encode a character code into a glyph code of the
font. */
int encoding_charset;
/* Charset to check if a character code is supported by the font.
-1 means that the contents of the font must be looked up to
determine it.
*/
int repertory_charet;
/* Minimum glyph width (in pixels). */
int min_width;
/* Ascent and descent of the font (in pixels). */
int ascent, descent;
/* There will be more to this structure, but they are private to a
font-driver. */
};
struct font_metrics
{
short lbearing, rbearing, width, ascent, descent;
};
struct font_bitmap
{
int rows;
int width;
int pitch;
unsigned char *buffer;
int left;
int top;
int advance;
void *extra;
};
/* Predicates to check various font-related objects. */
#define FONTP(x) \
(VECTORP (x) && (ASIZE (x) == FONT_SPEC_MAX || ASIZE (x) == FONT_ENTITY_MAX))
#define FONT_SPEC_P(x) \
(VECTORP (x) && ASIZE (x) == FONT_SPEC_MAX)
#define FONT_ENTITY_P(x) \
(VECTORP (x) && ASIZE (x) == FONT_ENTITY_MAX)
#define FONT_OBJECT_P(x) \
(XTYPE (x) == Lisp_Misc && XMISCTYPE (x) == Lisp_Misc_Save_Value)
/* Check macros for various font-related objects. */
#define CHECK_FONT(x) \
do { if (! FONTP (x)) x = wrong_type_argument (Qfont, x); } while (0)
#define CHECK_FONT_SPEC(x) \
do { if (! FONT_SPEC_P (x)) x = wrong_type_argument (Qfont, x); } while (0)
#define CHECK_FONT_ENTITY(x) \
do { if (! FONT_ENTITY_P (x)) x = wrong_type_argument (Qfont, x); } while (0)
#define CHECK_FONT_OBJECT(x) \
do { if (! FONT_OBJECT_P (x)) x = wrong_type_argument (Qfont, x); } while (0)
#define CHECK_FONT_GET_OBJECT(x, font) \
do { \
if (! FONT_OBJECT_P (x)) x = wrong_type_argument (Qfont, x); \
if (! XSAVE_VALUE (x)->pointer) error ("Font already closed"); \
font = XSAVE_VALUE (x)->pointer; \
} while (0)
struct face;
struct composition;
/* Macros for lispy glyph-string. */
#define LGSTRING_FONT(lgs) AREF (AREF ((lgs), 0), 0)
#define LGSTRING_LBEARING(lgs) AREF (AREF ((lgs), 0), 1)
#define LGSTRING_RBEARING(lgs) AREF (AREF ((lgs), 0), 2)
#define LGSTRING_WIDTH(lgs) AREF (AREF ((lgs), 0), 3)
#define LGSTRING_ASCENT(lgs) AREF (AREF ((lgs), 0), 4)
#define LGSTRING_DESCENT(lgs) AREF (AREF ((lgs), 0), 5)
#define LGSTRING_SET_FONT(lgs, val) ASET (AREF ((lgs), 0), 0, (val))
#define LGSTRING_SET_LBEARING(lgs, val) ASET (AREF ((lgs), 0), 1, (val))
#define LGSTRING_SET_RBEARING(lgs, val) ASET (AREF ((lgs), 0), 2, (val))
#define LGSTRING_SET_WIDTH(lgs, val) ASET (AREF ((lgs), 0), 3, (val))
#define LGSTRING_SET_ASCENT(lgs, val) ASET (AREF ((lgs), 0), 4, (val))
#define LGSTRING_SET_DESCENT(lgs, val) ASET (AREF ((lgs), 0), 5, (val))
#define LGSTRING_LENGTH(lgs) (ASIZE ((lgs)) - 1)
#define LGSTRING_GLYPH(lgs, idx) AREF ((lgs), (idx) + 1)
#define LGLYPH_CHAR(g) AREF ((g), 2)
#define LGLYPH_CODE(g) AREF ((g), 3)
#define LGLYPH_XOFF(g) AREF ((g), 4)
#define LGLYPH_YOFF(g) AREF ((g), 5)
#define LGLYPH_WIDTH(g) AREF ((g), 6)
#define LGLYPH_WADJUST(g) AREF ((g), 7)
#define LGLYPH_SET_CHAR(g, val) ASET ((g), 2, (val))
#define LGLYPH_SET_CODE(g, val) ASET ((g), 3, (val))
#define LGLYPH_SET_XOFF(g, val) ASET ((g), 4, (val))
#define LGLYPH_SET_YOFF(g, val) ASET ((g), 5, (val))
#define LGLYPH_SET_WIDTH(g, val) ASET ((g), 6, (val))
#define LGLYPH_SET_WADJUST(g, val) ASET ((g), 7, (val))
#define FONT_INVALID_CODE 0xFFFFFFFF
struct font_driver
{
/* Symbol indicating the type of the font-driver. */
Lisp_Object type;
/* Return a cache of font-entities on FRAME. The cache must be a
cons whose cdr part is the actual cache area. */
Lisp_Object (*get_cache) P_ ((Lisp_Object frame));
/* Parse font name NAME, store the font properties in SPEC, and
return 0. If the font-driver can't parse NAME, return -1. */
int (*parse_name) P_ ((FRAME_PTR f, char *name, Lisp_Object spec));
/* List fonts matching with FONT_SPEC on FRAME. The value is a
vector of font-entities. This is the sole API that allocates
font-entities. */
Lisp_Object (*list) P_ ((Lisp_Object frame, Lisp_Object font_spec));
/* List available families. The value is a list of family names
(symbols). The method can be NULL if the driver doesn't support
this facility. */
Lisp_Object (*list_family) P_ ((Lisp_Object frame));
/* Free FONT_EXTRA_INDEX field of FONT_ENTITY. This method can be
NULL if FONT_EXTRA_INDEX of FONT_ENTITY is a normal Lisp object
(i.e. not Lisp_Save_Value). */
void (*free_entity) P_ ((Lisp_Object font_entity));
/* Open a font specified by FONT_ENTITY on frame F. If the font is
scalable, open it with PIXEL_SIZE. */
struct font *(*open) P_ ((FRAME_PTR f, Lisp_Object font_entity,
int pixel_size));
/* Close FONT on frame F. */
void (*close) P_ ((FRAME_PTR f, struct font *font));
/* Prepare FACE for displaying characters by FONT on frame F. If
successful, return 0. Otherwise, return -1. This method can be
NULL if there's nothing to do. */
int (*prepare_face) P_ ((FRAME_PTR f, struct face *face));
/* Done FACE for displaying characters by FACE->font on frame F.
This method can be NULL if there's nothing to do. */
void (*done_face) P_ ((FRAME_PTR f, struct face *face));
/* If FONT_ENTITY has a glyph for character C, return 1. If not,
return 0. If a font must be opened to check it, return -1. This
method can be NULL if the driver always requires a font to be
opened for this check. In that case, we must open a font and use
`encode_char' method. */
int (*has_char) P_ ((Lisp_Object entity, int c));
/* Return a glyph code of FONT for characer C. If FONT doesn't have
such a glyph, return FONT_INVALID_CODE. */
unsigned (*encode_char) P_ ((struct font *font, int c));
/* Perform the size computation of glyphs of FONT and fillin members
of METRICS. The glyphs are specified by their glyph codes in
CODE (length NGLYPHS). */
int (*text_extents) P_ ((struct font *font,
unsigned *code, int nglyphs,
struct font_metrics *metrics));
/* Draw glyphs between FROM and TO of S->char2b at (X Y) pixel
position of frame F with S->FACE and S->GC. If WITH_BACKGROUND
is nonzero, fill the background in advance. It is assured that
WITH_BACKGROUND is zero when (FROM > 0 || TO < S->nchars). */
int (*draw) P_ ((struct glyph_string *s, int from, int to,
int x, int y, int with_background));
/* Store bitmap data for glyph-code CODE of FONT in BITMAP. This
method can be NULL if the driver doesn't support this facility.
It is intended that this method is callled from the other
font-driver for actual drawing. */
int (*get_bitmap) P_ ((struct font *font, unsigned code,
struct font_bitmap *bitmap,
int bits_per_pixel));
/* Free bitmap data in BITMAP. This method can be NULL if no data
have to be freed. */
void (*free_bitmap) P_ ((struct font *font, struct font_bitmap *bitmap));
/* Return an outline data for glyph-code CODE of FONT. The format
of the outline data depends on the font-driver. This method can
be NULL if the driver doesn't support this facility. */
void *(*get_outline) P_ ((struct font *font, unsigned code));
/* Free OUTLINE (that is obtained by the above method). */
void (*free_outline) P_ ((struct font *font, void *outline));
/* Get coordinates of the INDEXth anchor point of the glyph whose
code is CODE. Store the coordinates in *X and *Y. Return 0 if
the operations was successfull. Otherwise return -1. This
method can be NULL if the driver doesn't support this
facility. */
int (*anchor_point) P_ ((struct font *font, unsigned code, int index,
int *x, int *y));
/* Return a list describing which scripts/languages FONT
supports by which GSUB/GPOS features of OpenType tables. */
Lisp_Object (*otf_capability) P_ ((struct font *font));
/* Drive FONT's OTF GSUB features according to GSUB_SPEC.
GSUB_SPEC is in this format (all elements are symbols):
(SCRIPT LANGSYS GSUB-FEATURE ...)
If one of GSUB-FEATURE is nil, apply all gsub features except for
already applied and listed later. For instance, if the font has
GSUB features nukt, haln, rphf, blwf, and half,
(deva nil nukt haln nil rphf)
applies nukt and haln in this order, then applies blwf and half
in the order apearing in the font. The features are of the
default langsys of `deva' script.
This method applies the specified features to the codes in the
elements of GSTRING-IN (between FROMth and TOth). The output
codes are stored in GSTRING-OUT at the IDXth element and the
following elements.
Return the number of output codes. If none of the features are
applicable to the input data, return 0. If GSTRING-OUT is too
short, return -1. */
int (*otf_gsub) P_ ((struct font *font, Lisp_Object gsub_spec,
Lisp_Object gstring_in, int from, int to,
Lisp_Object gstring_out, int idx));
/* Drive FONT's OTF GPOS features according to GPOS_SPEC.
GPOS_SPEC is in this format (all elements are symbols):
(SCRIPT LANGSYS GPOS-FEATURE ...)
The meaning is the same as GSUB_SPEC above.
This method applies the specified features to the codes in the
elements of GSTRING (between FROMth and TOth). The resulting
positioning information (x-offset and y-offset) is stored in the
slots of the elements.
Return 1 if at least one glyph has nonzero x-offset or y-offset.
Otherwise return 0. */
int (*otf_gpos) P_ ((struct font *font, Lisp_Object gpos_spec,
Lisp_Object gstring, int from, int to));
};
struct font_driver_list
{
struct font_driver *driver;
struct font_driver_list *next;
};
extern int enable_font_backend;
EXFUN (Ffont_spec, MANY);
extern Lisp_Object font_symbolic_weight P_ ((Lisp_Object font));
extern Lisp_Object font_symbolic_slant P_ ((Lisp_Object font));
extern Lisp_Object font_symbolic_width P_ ((Lisp_Object font));
extern Lisp_Object font_find_object P_ ((struct font *font));
extern char *font_get_name P_ ((Lisp_Object));
extern Lisp_Object font_get_frame P_ ((Lisp_Object font));
extern int font_has_char P_ ((FRAME_PTR, Lisp_Object, int));
extern unsigned font_encode_char P_ ((Lisp_Object, int));
extern int font_set_lface_from_name P_ ((FRAME_PTR f,
Lisp_Object lface,
Lisp_Object fontname,
int force_p, int may_fail_p));
extern Lisp_Object font_find_for_lface P_ ((FRAME_PTR f, Lisp_Object *lface,
Lisp_Object spec));
extern Lisp_Object font_open_for_lface P_ ((FRAME_PTR f, Lisp_Object *lface,
Lisp_Object entity));
extern void font_load_for_face P_ ((FRAME_PTR f, struct face *face));
extern void font_prepare_for_face P_ ((FRAME_PTR f, struct face *face));
extern Lisp_Object font_open_by_name P_ ((FRAME_PTR f, char *name));
extern Lisp_Object intern_downcase P_ ((char *str, int len));
extern void font_update_sort_order P_ ((int *order));
extern void font_parse_old_font_spec P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object));
extern int font_parse_xlfd P_ ((char *name, Lisp_Object font, int merge));
extern int font_unparse_xlfd P_ ((Lisp_Object font, int pixel_size,
char *name, int bytes));
extern void register_font_driver P_ ((struct font_driver *driver, FRAME_PTR f));
extern void free_font_driver_list P_ ((FRAME_PTR f));
extern struct font *font_prepare_composition P_ ((struct composition *cmp));
#ifdef HAVE_LIBOTF
/* This can be used as `otf_capability' method of a font-driver. */
extern Lisp_Object font_otf_capability P_ ((struct font *font));
/* This can be used as `otf_gsub' method of a font-driver. */
extern int font_otf_gsub P_ ((struct font *font, Lisp_Object gsub_spec,
Lisp_Object gstring_in, int from, int to,
Lisp_Object gstring_out, int idx));
/* This can be used as `otf_gpos' method of a font-driver. */
extern int font_otf_gpos P_ ((struct font *font, Lisp_Object gpos_spec,
Lisp_Object gstring, int from, int to));
#endif /* HAVE_LIBOTF */
#ifdef HAVE_FREETYPE
extern struct font_driver ftfont_driver;
#endif /* HAVE_FREETYPE */
#ifdef HAVE_X_WINDOWS
extern struct font_driver xfont_driver;
extern struct font_driver ftxfont_driver;
#ifdef HAVE_XFT
extern struct font_driver xftfont_driver;
#endif /* HAVE_XFT */
#endif /* HAVE_X_WINDOWS */
#ifdef WINDOWSNT
extern struct font_driver w32font_driver;
#endif /* WINDOWSNT */
#ifdef MAC_OS
extern struct font_driver atmfont_driver;
#endif /* MAC_OS */
#endif /* not EMACS_FONT_H */

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/* ftfont.c -- FreeType font driver.
Copyright (C) 2006 Free Software Foundation, Inc.
Copyright (C) 2006
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs 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 2, or (at your option)
any later version.
GNU Emacs 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <config.h>
#include <stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_SIZES_H
#include <fontconfig/fontconfig.h>
#include <fontconfig/fcfreetype.h>
#include "lisp.h"
#include "dispextern.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "coding.h"
#include "fontset.h"
#include "font.h"
Lisp_Object Qfreetype;
static int fc_initialized;
static FT_Library ft_library;
static Lisp_Object freetype_font_cache;
static Lisp_Object Qiso8859_1, Qiso10646_1, Qunicode_bmp;
static FcCharSet *cs_iso8859_1;
/* The actual structure for FreeType font that can be casted to struct
font. */
struct ftfont_info
{
struct font font;
FT_Size ft_size;
};
static int
ftfont_build_basic_charsets ()
{
FcChar32 c;
cs_iso8859_1 = FcCharSetCreate ();
if (! cs_iso8859_1)
return -1;
for (c = ' '; c < 127; c++)
if (! FcCharSetAddChar (cs_iso8859_1, c))
return -1;
for (c = 192; c < 256; c++)
if (! FcCharSetAddChar (cs_iso8859_1, c))
return -1;
return 0;
}
static Lisp_Object ftfont_get_cache P_ ((Lisp_Object));
static int ftfont_parse_name P_ ((FRAME_PTR, char *, Lisp_Object));
static Lisp_Object ftfont_list P_ ((Lisp_Object, Lisp_Object));
static Lisp_Object ftfont_list_family P_ ((Lisp_Object));
static void ftfont_free_entity P_ ((Lisp_Object));
static struct font *ftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
static void ftfont_close P_ ((FRAME_PTR, struct font *));
static int ftfont_has_char P_ ((Lisp_Object, int));
static unsigned ftfont_encode_char P_ ((struct font *, int));
static int ftfont_text_extents P_ ((struct font *, unsigned *, int,
struct font_metrics *));
static int ftfont_get_bitmap P_ ((struct font *, unsigned,
struct font_bitmap *, int));
static int ftfont_anchor_point P_ ((struct font *, unsigned, int,
int *, int *));
struct font_driver ftfont_driver =
{
(Lisp_Object) NULL, /* Qfreetype */
ftfont_get_cache,
ftfont_parse_name,
ftfont_list,
ftfont_list_family,
ftfont_free_entity,
ftfont_open,
ftfont_close,
/* We can't draw a text without device dependent functions. */
NULL,
NULL,
ftfont_has_char,
ftfont_encode_char,
ftfont_text_extents,
/* We can't draw a text without device dependent functions. */
NULL,
ftfont_get_bitmap,
NULL,
NULL,
NULL,
ftfont_anchor_point,
#ifdef HAVE_LIBOTF
font_otf_capability,
font_otf_gsub,
font_otf_gpos
#else
NULL,
NULL,
NULL
#endif /* HAVE_LIBOTF */
};
#define SYMBOL_FcChar8(SYM) (FcChar8 *) SDATA (SYMBOL_NAME (SYM))
extern Lisp_Object QCname;
static Lisp_Object
ftfont_get_cache (frame)
Lisp_Object frame;
{
if (NILP (freetype_font_cache))
freetype_font_cache = Fcons (Qt, Qnil);
return freetype_font_cache;
}
static int
ftfont_parse_name (f, name, spec)
FRAME_PTR f;
char *name;
Lisp_Object spec;
{
FcPattern *p;
FcChar8 *str;
int numeric;
double dbl;
if (name[0] == '-' || strchr (name, '*'))
/* It seems that NAME is XLFD. */
return -1;
p = FcNameParse ((FcChar8 *) name);
if (! p)
return -1;
if (FcPatternGetString (p, FC_FOUNDRY, 0, &str) == FcResultMatch)
ASET (spec, FONT_FOUNDRY_INDEX,
intern_downcase ((char *) str, strlen ((char *) str)));
if (FcPatternGetString (p, FC_FAMILY, 0, &str) == FcResultMatch)
ASET (spec, FONT_FAMILY_INDEX,
intern_downcase ((char *) str, strlen ((char *) str)));
if (FcPatternGetInteger (p, FC_WEIGHT, 0, &numeric) == FcResultMatch)
ASET (spec, FONT_WEIGHT_INDEX, make_number (numeric));
if (FcPatternGetInteger (p, FC_SLANT, 0, &numeric) == FcResultMatch)
ASET (spec, FONT_SLANT_INDEX, make_number (numeric + 100));
if (FcPatternGetInteger (p, FC_WIDTH, 0, &numeric) == FcResultMatch)
ASET (spec, FONT_WIDTH_INDEX, make_number (numeric));
if (FcPatternGetDouble (p, FC_PIXEL_SIZE, 0, &dbl) == FcResultMatch)
ASET (spec, FONT_SIZE_INDEX, make_number (dbl));
else if (FcPatternGetDouble (p, FC_SIZE, 0, &dbl) == FcResultMatch)
ASET (spec, FONT_SIZE_INDEX, make_float (dbl));
return 0;
}
static Lisp_Object
ftfont_list (frame, spec)
Lisp_Object frame, spec;
{
Lisp_Object val, tmp, extra, font_name;
int i;
FcPattern *pattern = NULL;
FcCharSet *charset = NULL;
FcLangSet *langset = NULL;
FcFontSet *fontset = NULL;
FcObjectSet *objset = NULL;
Lisp_Object registry = Qnil;
val = null_vector;
if (! fc_initialized)
{
FcInit ();
fc_initialized = 1;
}
if (! NILP (AREF (spec, FONT_ADSTYLE_INDEX)))
return val;
if (! NILP (AREF (spec, FONT_REGISTRY_INDEX)))
{
registry = AREF (spec, FONT_REGISTRY_INDEX);
if (EQ (registry, Qiso8859_1))
{
if (! cs_iso8859_1
&& ftfont_build_basic_charsets () < 0)
goto err;
charset = cs_iso8859_1;
registry = Qnil;
}
}
extra = AREF (spec, FONT_EXTRA_INDEX);
font_name = Qnil;
if (CONSP (extra))
{
tmp = Fassq (QCotf, extra);
if (! NILP (tmp))
return val;
tmp = Fassq (QClanguage, extra);
if (CONSP (tmp))
{
langset = FcLangSetCreate ();
if (! langset)
goto err;
tmp = XCDR (tmp);
if (SYMBOLP (tmp))
{
if (! FcLangSetAdd (langset, SYMBOL_FcChar8 (tmp)))
goto err;
}
else
while (CONSP (tmp))
{
if (SYMBOLP (XCAR (tmp))
&& ! FcLangSetAdd (langset, SYMBOL_FcChar8 (XCAR (tmp))))
goto err;
tmp = XCDR (tmp);
}
}
tmp = Fassq (QCname, extra);
if (CONSP (tmp))
font_name = XCDR (tmp);
tmp = Fassq (QCscript, extra);
if (CONSP (tmp) && ! charset)
{
Lisp_Object script = XCDR (tmp);
Lisp_Object chars = assq_no_quit (script,
Vscript_representative_chars);
if (CONSP (chars))
{
charset = FcCharSetCreate ();
if (! charset)
goto err;
for (chars = XCDR (chars); CONSP (chars); chars = XCDR (chars))
if (CHARACTERP (XCAR (chars))
&& ! FcCharSetAddChar (charset, XUINT (XCAR (chars))))
goto err;
}
}
}
if (! NILP (registry) && ! charset)
goto finish;
if (STRINGP (font_name))
{
if (! isalpha (SDATA (font_name)[0]))
goto finish;
pattern = FcNameParse (SDATA (font_name));
if (! pattern)
goto err;
}
else
{
pattern = FcPatternCreate ();
if (! pattern)
goto err;
tmp = AREF (spec, FONT_FOUNDRY_INDEX);
if (SYMBOLP (tmp) && ! NILP (tmp)
&& ! FcPatternAddString (pattern, FC_FOUNDRY, SYMBOL_FcChar8 (tmp)))
goto err;
tmp = AREF (spec, FONT_FAMILY_INDEX);
if (SYMBOLP (tmp) && ! NILP (tmp)
&& ! FcPatternAddString (pattern, FC_FAMILY, SYMBOL_FcChar8 (tmp)))
goto err;
tmp = AREF (spec, FONT_WEIGHT_INDEX);
if (INTEGERP (tmp)
&& ! FcPatternAddInteger (pattern, FC_WEIGHT, XINT (tmp)))
goto err;
tmp = AREF (spec, FONT_SLANT_INDEX);
if (INTEGERP (tmp)
&& XINT (tmp) >= 100
&& ! FcPatternAddInteger (pattern, FC_SLANT, XINT (tmp) - 100))
goto err;
tmp = AREF (spec, FONT_WIDTH_INDEX);
if (INTEGERP (tmp)
&& ! FcPatternAddInteger (pattern, FC_WIDTH, XINT (tmp)))
goto err;
if (! FcPatternAddBool (pattern, FC_SCALABLE, FcTrue))
goto err;
}
if (charset
&& ! FcPatternAddCharSet (pattern, FC_CHARSET, charset))
goto err;
if (langset
&& ! FcPatternAddLangSet (pattern, FC_LANG, langset))
goto err;
objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING,
FC_CHARSET, FC_FILE, NULL);
if (! objset)
goto err;
BLOCK_INPUT;
fontset = FcFontList (NULL, pattern, objset);
UNBLOCK_INPUT;
if (! fontset)
goto err;
val = Qnil;
for (i = 0; i < fontset->nfont; i++)
{
FcPattern *p = fontset->fonts[i];
FcChar8 *str, *file;
if (FcPatternGetString (p, FC_FILE, 0, &file) == FcResultMatch
&& FcPatternGetCharSet (p, FC_CHARSET, 0, &charset) == FcResultMatch)
{
Lisp_Object entity = Fmake_vector (make_number (FONT_ENTITY_MAX),
null_string);
int numeric;
double dbl;
FcPattern *p0;
ASET (entity, FONT_TYPE_INDEX, Qfreetype);
ASET (entity, FONT_REGISTRY_INDEX, Qiso10646_1);
ASET (entity, FONT_FRAME_INDEX, frame);
ASET (entity, FONT_OBJLIST_INDEX, Qnil);
if (FcPatternGetString (p, FC_FOUNDRY, 0, &str) == FcResultMatch)
ASET (entity, FONT_FOUNDRY_INDEX,
intern_downcase ((char *) str, strlen ((char *) str)));
if (FcPatternGetString (p, FC_FAMILY, 0, &str) == FcResultMatch)
ASET (entity, FONT_FAMILY_INDEX,
intern_downcase ((char *) str, strlen ((char *) str)));
if (FcPatternGetInteger (p, FC_WEIGHT, 0, &numeric) == FcResultMatch)
ASET (entity, FONT_WEIGHT_INDEX, make_number (numeric));
if (FcPatternGetInteger (p, FC_SLANT, 0, &numeric) == FcResultMatch)
ASET (entity, FONT_SLANT_INDEX, make_number (numeric + 100));
if (FcPatternGetInteger (p, FC_WIDTH, 0, &numeric) == FcResultMatch)
ASET (entity, FONT_WIDTH_INDEX, make_number (numeric));
if (FcPatternGetDouble (p, FC_PIXEL_SIZE, 0, &dbl) == FcResultMatch)
ASET (entity, FONT_SIZE_INDEX, make_number (dbl));
else
ASET (entity, FONT_SIZE_INDEX, make_number (0));
if (FcPatternGetInteger (p, FC_SPACING, 0, &numeric) != FcResultMatch)
numeric = FC_MONO;
p0 = FcPatternCreate ();
if (! p0
|| FcPatternAddString (p0, FC_FILE, file) == FcFalse
|| FcPatternAddCharSet (p0, FC_CHARSET, charset) == FcFalse
|| FcPatternAddInteger (p0, FC_SPACING, numeric) == FcFalse)
break;
ASET (entity, FONT_EXTRA_INDEX, make_save_value (p0, 0));
val = Fcons (entity, val);
}
}
val = Fvconcat (1, &val);
goto finish;
err:
/* We come here because of unexpected error in fontconfig API call
(usually insufficiency memory). */
val = Qnil;
finish:
if (charset && charset != cs_iso8859_1) FcCharSetDestroy (charset);
if (objset) FcObjectSetDestroy (objset);
if (fontset) FcFontSetDestroy (fontset);
if (langset) FcLangSetDestroy (langset);
if (pattern) FcPatternDestroy (pattern);
return val;
}
static Lisp_Object
ftfont_list_family (frame)
Lisp_Object frame;
{
Lisp_Object list;
FcPattern *pattern = NULL;
FcFontSet *fontset = NULL;
FcObjectSet *objset = NULL;
int i;
if (! fc_initialized)
{
FcInit ();
fc_initialized = 1;
}
pattern = FcPatternCreate ();
if (! pattern)
goto finish;
objset = FcObjectSetBuild (FC_FAMILY);
if (! objset)
goto finish;
fontset = FcFontList (NULL, pattern, objset);
if (! fontset)
goto finish;
list = Qnil;
for (i = 0; i < fontset->nfont; i++)
{
FcPattern *pat = fontset->fonts[i];
FcChar8 *str;
if (FcPatternGetString (pat, FC_FAMILY, 0, &str) == FcResultMatch)
list = Fcons (intern_downcase ((char *) str, strlen ((char *) str)),
list);
}
finish:
if (objset) FcObjectSetDestroy (objset);
if (fontset) FcFontSetDestroy (fontset);
if (pattern) FcPatternDestroy (pattern);
return list;
}
static void
ftfont_free_entity (entity)
Lisp_Object entity;
{
Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);
FcPattern *pattern = XSAVE_VALUE (val)->pointer;
FcPatternDestroy (pattern);
}
static struct font *
ftfont_open (f, entity, pixel_size)
FRAME_PTR f;
Lisp_Object entity;
int pixel_size;
{
struct ftfont_info *ftfont_info;
struct font *font;
FT_Face ft_face;
FT_Size ft_size;
FT_UInt size;
Lisp_Object val;
FcPattern *pattern;
FcChar8 *file;
int spacing;
val = AREF (entity, FONT_EXTRA_INDEX);
if (XTYPE (val) != Lisp_Misc
|| XMISCTYPE (val) != Lisp_Misc_Save_Value)
return NULL;
pattern = XSAVE_VALUE (val)->pointer;
if (XSAVE_VALUE (val)->integer == 0)
{
/* We have not yet created FT_Face for this font. */
if (! ft_library
&& FT_Init_FreeType (&ft_library) != 0)
return NULL;
if (FcPatternGetString (pattern, FC_FILE, 0, &file) != FcResultMatch)
return NULL;
if (FT_New_Face (ft_library, (char *) file, 0, &ft_face) != 0)
return NULL;
FcPatternAddFTFace (pattern, FC_FT_FACE, ft_face);
ft_size = ft_face->size;
}
else
{
if (FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &ft_face)
!= FcResultMatch)
return NULL;
if (FT_New_Size (ft_face, &ft_size) != 0)
return NULL;
if (FT_Activate_Size (ft_size) != 0)
{
FT_Done_Size (ft_size);
return NULL;
}
}
size = XINT (AREF (entity, FONT_SIZE_INDEX));
if (size == 0)
size = pixel_size;
if (FT_Set_Pixel_Sizes (ft_face, size, size) != 0)
{
if (XSAVE_VALUE (val)->integer == 0)
FT_Done_Face (ft_face);
return NULL;
}
ftfont_info = malloc (sizeof (struct ftfont_info));
if (! ftfont_info)
return NULL;
ftfont_info->ft_size = ft_size;
font = (struct font *) ftfont_info;
font->entity = entity;
font->pixel_size = size;
font->driver = &ftfont_driver;
font->font.name = font->font.full_name = NULL;
font->file_name = (char *) file;
font->font.size = ft_face->size->metrics.max_advance >> 6;
font->ascent = ft_face->size->metrics.ascender >> 6;
font->descent = - ft_face->size->metrics.descender >> 6;
font->font.height = ft_face->size->metrics.height >> 6;
if (FcPatternGetInteger (pattern, FC_SPACING, 0, &spacing) != FcResultMatch
|| spacing != FC_PROPORTIONAL)
font->font.average_width = font->font.space_width = font->font.size;
else
{
int i;
for (i = 32; i < 127; i++)
{
if (FT_Load_Char (ft_face, i, FT_LOAD_DEFAULT) != 0)
break;
if (i == 32)
font->font.space_width = ft_face->glyph->metrics.horiAdvance >> 6;
font->font.average_width += ft_face->glyph->metrics.horiAdvance >> 6;
}
if (i == 127)
{
/* The font contains all ASCII printable characters. */
font->font.average_width /= 95;
}
else
{
if (i == 32)
font->font.space_width = font->font.size;
font->font.average_width = font->font.size;
}
}
font->font.baseline_offset = 0;
font->font.relative_compose = 0;
font->font.default_ascent = 0;
font->font.vertical_centering = 0;
(XSAVE_VALUE (val)->integer)++;
return font;
}
static void
ftfont_close (f, font)
FRAME_PTR f;
struct font *font;
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
Lisp_Object entity = font->entity;
Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);
(XSAVE_VALUE (val)->integer)--;
if (XSAVE_VALUE (val)->integer == 0)
FT_Done_Face (ftfont_info->ft_size->face);
else
FT_Done_Size (ftfont_info->ft_size);
free (font);
}
static int
ftfont_has_char (entity, c)
Lisp_Object entity;
int c;
{
Lisp_Object val;
FcPattern *pattern;
FcCharSet *charset;
val = AREF (entity, FONT_EXTRA_INDEX);
pattern = XSAVE_VALUE (val)->pointer;
FcPatternGetCharSet (pattern, FC_CHARSET, 0, &charset);
return (FcCharSetHasChar (charset, (FcChar32) c) == FcTrue);
}
static unsigned
ftfont_encode_char (font, c)
struct font *font;
int c;
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
FT_ULong charcode = c;
FT_UInt code = FT_Get_Char_Index (ft_face, charcode);
return (code > 0 ? code : 0xFFFFFFFF);
}
static int
ftfont_text_extents (font, code, nglyphs, metrics)
struct font *font;
unsigned *code;
int nglyphs;
struct font_metrics *metrics;
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
int width = 0;
int i;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
if (metrics)
bzero (metrics, sizeof (struct font_metrics));
for (i = 0; i < nglyphs; i++)
{
if (FT_Load_Glyph (ft_face, code[i], FT_LOAD_DEFAULT) == 0)
{
FT_Glyph_Metrics *m = &ft_face->glyph->metrics;
if (metrics)
{
if (metrics->lbearing > width + (m->horiBearingX >> 6))
metrics->lbearing = width + (m->horiBearingX >> 6);
if (metrics->rbearing
< width + ((m->horiBearingX + m->width) >> 6))
metrics->rbearing
= width + ((m->horiBearingX + m->width) >> 6);
if (metrics->ascent < (m->horiBearingY >> 6))
metrics->ascent = m->horiBearingY >> 6;
if (metrics->descent > ((m->horiBearingY + m->height) >> 6))
metrics->descent = (m->horiBearingY + m->height) >> 6;
}
width += m->horiAdvance >> 6;
}
else
{
width += font->font.space_width;
}
}
if (metrics)
metrics->width = width;
return width;
}
static int
ftfont_get_bitmap (font, code, bitmap, bits_per_pixel)
struct font *font;
unsigned code;
struct font_bitmap *bitmap;
int bits_per_pixel;
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
FT_Int32 load_flags = FT_LOAD_RENDER;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
if (bits_per_pixel == 1)
{
#ifdef FT_LOAD_TARGET_MONO
load_flags |= FT_LOAD_TARGET_MONO;
#else
load_flags |= FT_LOAD_MONOCHROME;
#endif
}
else if (bits_per_pixel != 8)
/* We don't support such a rendering. */
return -1;
if (FT_Load_Glyph (ft_face, code, load_flags) != 0)
return -1;
bitmap->rows = ft_face->glyph->bitmap.rows;
bitmap->width = ft_face->glyph->bitmap.width;
bitmap->pitch = ft_face->glyph->bitmap.pitch;
bitmap->buffer = ft_face->glyph->bitmap.buffer;
bitmap->left = ft_face->glyph->bitmap_left;
bitmap->top = ft_face->glyph->bitmap_top;
bitmap->advance = ft_face->glyph->metrics.horiAdvance >> 6;
bitmap->extra = NULL;
return 0;
}
static int
ftfont_anchor_point (font, code, index, x, y)
struct font *font;
unsigned code;
int index;
int *x, *y;
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
return -1;
if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
return -1;
if (index >= ft_face->glyph->outline.n_points)
return -1;
*x = ft_face->glyph->outline.points[index].x;
*y = ft_face->glyph->outline.points[index].y;
return 0;
}
void
syms_of_ftfont ()
{
staticpro (&freetype_font_cache);
freetype_font_cache = Qnil;
DEFSYM (Qfreetype, "freetype");
DEFSYM (Qiso8859_1, "iso8859-1");
DEFSYM (Qiso10646_1, "iso10646-1");
DEFSYM (Qunicode_bmp, "unicode-bmp");
ftfont_driver.type = Qfreetype;
register_font_driver (&ftfont_driver, NULL);
}

346
src/ftxfont.c Normal file
View File

@ -0,0 +1,346 @@
/* ftxfont.c -- FreeType font driver on X (without using XFT).
Copyright (C) 2006 Free Software Foundation, Inc.
Copyright (C) 2006
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs 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 2, or (at your option)
any later version.
GNU Emacs 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <config.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include "lisp.h"
#include "dispextern.h"
#include "xterm.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "fontset.h"
#include "font.h"
/* FTX font driver. */
static Lisp_Object Qftx;
/* Prototypes for helper function. */
static int ftxfont_draw_bitmap P_ ((FRAME_PTR, GC *, struct font *, unsigned,
int, int, XPoint *, int, int *n));
static void ftxfont_draw_backgrond P_ ((FRAME_PTR, struct font *, GC,
int, int, int));
static int
ftxfont_draw_bitmap (f, gc, font, code, x, y, p, size, n)
FRAME_PTR f;
GC *gc;
struct font *font;
unsigned code;
int x, y;
XPoint *p;
int size, *n;
{
struct font_bitmap bitmap;
unsigned char *b;
int i, j;
if (ftfont_driver.get_bitmap (font, code, &bitmap, 1) < 0)
return 0;
for (i = 0, b = bitmap.buffer; i < bitmap.rows;
i++, b += bitmap.pitch)
{
if (size > 0x100)
{
for (j = 0; j < bitmap.width; j++)
if (b[j / 8] & (1 << (7 - (j % 8))))
{
p[n[0]].x = x + bitmap.left + j;
p[n[0]].y = y - bitmap.top + i;
if (++n[0] == 0x400)
{
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
gc[0], p, size, CoordModeOrigin);
n[0] = 0;
}
}
}
else
{
for (j = 0; j < bitmap.width; j++)
{
int idx = (b[j] >> 5) - 1;
if (idx >= 0)
{
XPoint *pp = p + size * idx;
pp[n[idx]].x = x + bitmap.left + j;
pp[n[idx]].y = y - bitmap.top + i;
if (++(n[idx]) == 0x100)
{
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
gc[idx], pp, size, CoordModeOrigin);
n[idx] = 0;
}
}
}
}
}
if (ftfont_driver.free_bitmap)
ftfont_driver.free_bitmap (font, &bitmap);
return bitmap.advance;
}
static void
ftxfont_draw_backgrond (f, font, gc, x, y, width)
FRAME_PTR f;
struct font *font;
GC gc;
int x, y, width;
{
XGCValues xgcv;
XGetGCValues (FRAME_X_DISPLAY (f), gc,
GCForeground | GCBackground, &xgcv);
XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.background);
XFillRectangle (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), gc,
x, y - font->ascent, width, font->font.height);
XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.foreground);
}
/* Prototypes for font-driver methods. */
static Lisp_Object ftxfont_list P_ ((Lisp_Object, Lisp_Object));
static struct font *ftxfont_open P_ ((FRAME_PTR, Lisp_Object, int));
static void ftxfont_close P_ ((FRAME_PTR, struct font *));
static int ftxfont_prepare_face (FRAME_PTR, struct face *);
static void ftxfont_done_face (FRAME_PTR, struct face *);
static int ftxfont_draw P_ ((struct glyph_string *, int, int, int, int, int));
struct font_driver ftxfont_driver;
static Lisp_Object
ftxfont_list (frame, spec)
Lisp_Object frame;
Lisp_Object spec;
{
Lisp_Object val = ftfont_driver.list (frame, spec);
if (! NILP (val))
{
int i;
for (i = 0; i < ASIZE (val); i++)
ASET (AREF (val, i), FONT_TYPE_INDEX, Qftx);
}
return val;
}
static struct font *
ftxfont_open (f, entity, pixel_size)
FRAME_PTR f;
Lisp_Object entity;
int pixel_size;
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
struct font *font;
XFontStruct *xfont = malloc (sizeof (XFontStruct));
if (! xfont)
return NULL;
font = ftfont_driver.open (f, entity, pixel_size);
if (! font)
{
free (xfont);
return NULL;
}
xfont->fid = FRAME_FONT (f)->fid;
xfont->ascent = font->ascent;
xfont->descent = font->descent;
xfont->max_bounds.width = font->font.size;
xfont->min_bounds.width = font->min_width;
font->font.font = xfont;
font->driver = &ftxfont_driver;
dpyinfo->n_fonts++;
/* Set global flag fonts_changed_p to non-zero if the font loaded
has a character with a smaller width than any other character
before, or if the font loaded has a smaller height than any other
font loaded before. If this happens, it will make a glyph matrix
reallocation necessary. */
if (dpyinfo->n_fonts == 1)
{
dpyinfo->smallest_font_height = font->font.height;
dpyinfo->smallest_char_width = font->min_width;
fonts_changed_p = 1;
}
else
{
if (dpyinfo->smallest_font_height > font->font.height)
dpyinfo->smallest_font_height = font->font.height, fonts_changed_p |= 1;
if (dpyinfo->smallest_char_width > font->min_width)
dpyinfo->smallest_char_width = font->min_width, fonts_changed_p |= 1;
}
return font;
}
static void
ftxfont_close (f, font)
FRAME_PTR f;
struct font *font;
{
ftfont_driver.close (f, font);
FRAME_X_DISPLAY_INFO (f)->n_fonts--;
}
static int
ftxfont_prepare_face (f, face)
FRAME_PTR f;
struct face *face;
{
GC gc[6];
XColor colors[3];
XGCValues xgcv;
unsigned long mask = GCForeground | GCBackground | GCGraphicsExposures;
int i;
face->extra = NULL;
/* Here, we create 6 more GCs to simulate anti-aliasing. */
BLOCK_INPUT;
XGetGCValues (FRAME_X_DISPLAY (f), face->gc, mask, &xgcv);
colors[0].pixel = face->foreground;
colors[1].pixel = face->background;
XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors, 2);
for (i = 1; i < 7; i++)
{
colors[2].red = (colors[0].red * i + colors[1].red * (7 - i)) / 7;
colors[2].green = (colors[0].green * i + colors[1].green * (7 - i)) / 7;
colors[2].blue = (colors[0].blue * i + colors[1].blue * (7 - i)) / 7;
if (! x_alloc_nearest_color (f, FRAME_X_COLORMAP (f), &colors[2]))
break;
xgcv.foreground = colors[2].pixel;
gc[i - 1] = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
mask, &xgcv);
}
UNBLOCK_INPUT;
if (i < 7)
return -1;
face->extra = malloc (sizeof (GC) * 7);
if (! face->extra)
return -1;
for (i = 0; i < 6; i++)
((GC *) face->extra)[i] = gc[i];
((GC *) face->extra)[i] = face->gc;
return 0;
}
static void
ftxfont_done_face (f, face)
FRAME_PTR f;
struct face *face;
{
if (face->extra)
{
int i;
BLOCK_INPUT;
for (i = 0; i < 7; i++)
XFreeGC (FRAME_X_DISPLAY (f), ((GC *) face->extra)[i]);
UNBLOCK_INPUT;
free (face->extra);
face->extra = NULL;
}
}
static int
ftxfont_draw (s, from, to, x, y, with_background)
struct glyph_string *s;
int from, to, x, y, with_background;
{
FRAME_PTR f = s->f;
struct face *face = s->face;
struct font *font = (struct font *) face->font;
XPoint p[0x700];
int n[7];
unsigned *code;
int len = to - from;
int i;
n[0] = n[1] = n[2] = n[3] = n[4] = n[5] = n[6] = 0;
BLOCK_INPUT;
if (with_background)
ftxfont_draw_backgrond (f, font, s->gc, x, y, s->width);
code = alloca (sizeof (unsigned) * len);
for (i = 0; i < len; i++)
code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
| XCHAR2B_BYTE2 (s->char2b + from + i));
if (! face->extra)
{
for (i = 0; i < len; i++)
x += ftxfont_draw_bitmap (f, &face->gc, font, code[i], x, y,
p, 0x700, n);
if (n[0] > 0)
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
face->gc, p, n[0], CoordModeOrigin);
}
else
{
GC *gc = face->extra;
for (i = 0; i < len; i++)
x += ftxfont_draw_bitmap (f, &face->gc, font, code[i], x, y,
p, 0x100, n);
for (i = 0; i < 7; i++)
if (n[i] > 0)
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
gc[i], p + 0x100 * i, n[i], CoordModeOrigin);
}
UNBLOCK_INPUT;
return len;
}
void
syms_of_ftxfont ()
{
DEFSYM (Qftx, "ftx");
ftxfont_driver = ftfont_driver;
ftxfont_driver.type = Qftx;
ftxfont_driver.list = ftxfont_list;
ftxfont_driver.open = ftxfont_open;
ftxfont_driver.close = ftxfont_close;
ftxfont_driver.prepare_face = ftxfont_prepare_face;
ftxfont_driver.done_face = ftxfont_done_face;
ftxfont_driver.draw = ftxfont_draw;
register_font_driver (&ftxfont_driver, NULL);
}

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src/xfont.c Normal file
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/* xfont.c -- X core font driver.
Copyright (C) 2006 Free Software Foundation, Inc.
Copyright (C) 2006
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs 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 2, or (at your option)
any later version.
GNU Emacs 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <config.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include "lisp.h"
#include "dispextern.h"
#include "xterm.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "fontset.h"
#include "font.h"
/* X core font driver. */
Lisp_Object Qx;
/* Alist of font registry symbol and the corresponding charsets
information. The information is retrieved from
Vfont_encoding_alist on demand.
Eash element has the form:
(REGISTRY . (ENCODING-CHARSET-ID . REPERTORY-CHARSET-ID))
or
(REGISTRY . nil)
In the former form, ENCODING-CHARSET-ID is an ID of a charset that
encodes a character code to a glyph code of a font, and
REPERTORY-CHARSET-ID is an ID of a charset that tells if a
character is supported by a font.
The latter form means that the information for REGISTRY couldn't be
retrieved. */
static Lisp_Object x_font_charset_alist;
/* Prototypes of support functions. */
extern void x_clear_errors P_ ((Display *));
static char *xfont_query_font P_ ((Display *, char *, Lisp_Object));
static XCharStruct *xfont_get_pcm P_ ((XFontStruct *, XChar2b *));
static int xfont_registry_charsets P_ ((Lisp_Object, struct charset **,
struct charset **));
static char *
xfont_query_font (display, name, spec)
Display *display;
char *name;
Lisp_Object spec;
{
XFontStruct *font;
BLOCK_INPUT;
x_catch_errors (display);
font = XLoadQueryFont (display, name);
name = NULL;
if (x_had_errors_p (display))
{
/* This error is perhaps due to insufficient memory on X
server. Let's just ignore it. */
x_clear_errors (display);
}
else if (font)
{
unsigned long value;
if (XGetFontProperty (font, XA_FONT, &value))
{
char *n = (char *) XGetAtomName (display, (Atom) value);
if (font_parse_xlfd (n, spec, 0) >= 0)
name = n;
else
XFree (n);
}
XFreeFont (display, font);
}
x_uncatch_errors ();
UNBLOCK_INPUT;
return name;
}
/* Get metrics of character CHAR2B in XFONT. Value is null if CHAR2B
is not contained in the font. */
static XCharStruct *
xfont_get_pcm (xfont, char2b)
XFontStruct *xfont;
XChar2b *char2b;
{
/* The result metric information. */
XCharStruct *pcm = NULL;
xassert (xfont && char2b);
if (xfont->per_char != NULL)
{
if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0)
{
/* min_char_or_byte2 specifies the linear character index
corresponding to the first element of the per_char array,
max_char_or_byte2 is the index of the last character. A
character with non-zero CHAR2B->byte1 is not in the font.
A character with byte2 less than min_char_or_byte2 or
greater max_char_or_byte2 is not in the font. */
if (char2b->byte1 == 0
&& char2b->byte2 >= xfont->min_char_or_byte2
&& char2b->byte2 <= xfont->max_char_or_byte2)
pcm = xfont->per_char + char2b->byte2 - xfont->min_char_or_byte2;
}
else
{
/* If either min_byte1 or max_byte1 are nonzero, both
min_char_or_byte2 and max_char_or_byte2 are less than
256, and the 2-byte character index values corresponding
to the per_char array element N (counting from 0) are:
byte1 = N/D + min_byte1
byte2 = N\D + min_char_or_byte2
where:
D = max_char_or_byte2 - min_char_or_byte2 + 1
/ = integer division
\ = integer modulus */
if (char2b->byte1 >= xfont->min_byte1
&& char2b->byte1 <= xfont->max_byte1
&& char2b->byte2 >= xfont->min_char_or_byte2
&& char2b->byte2 <= xfont->max_char_or_byte2)
pcm = (xfont->per_char
+ ((xfont->max_char_or_byte2 - xfont->min_char_or_byte2 + 1)
* (char2b->byte1 - xfont->min_byte1))
+ (char2b->byte2 - xfont->min_char_or_byte2));
}
}
else
{
/* If the per_char pointer is null, all glyphs between the first
and last character indexes inclusive have the same
information, as given by both min_bounds and max_bounds. */
if (char2b->byte2 >= xfont->min_char_or_byte2
&& char2b->byte2 <= xfont->max_char_or_byte2)
pcm = &xfont->max_bounds;
}
return ((pcm == NULL
|| (pcm->width == 0 && (pcm->rbearing - pcm->lbearing) == 0))
? NULL : pcm);
}
extern Lisp_Object find_font_encoding P_ ((Lisp_Object));
/* Return encoding charset and repertory charset for REGISTRY in
ENCODING and REPERTORY correspondingly. If correct information for
REGISTRY is available, return 0. Otherwise return -1. */
static int
xfont_registry_charsets (registry, encoding, repertory)
Lisp_Object registry;
struct charset **encoding, **repertory;
{
Lisp_Object val;
int encoding_id, repertory_id;
val = assq_no_quit (registry, x_font_charset_alist);
if (! NILP (val))
{
val = XCDR (val);
if (NILP (val))
return -1;
encoding_id = XINT (XCAR (val));
repertory_id = XINT (XCDR (val));
}
else
{
val = find_font_encoding (SYMBOL_NAME (registry));
if (SYMBOLP (val) && CHARSETP (val))
{
encoding_id = repertory_id = XINT (CHARSET_SYMBOL_ID (val));
}
else if (CONSP (val))
{
if (! CHARSETP (XCAR (val)))
goto invalid_entry;
encoding_id = XINT (CHARSET_SYMBOL_ID (XCAR (val)));
if (NILP (XCDR (val)))
repertory_id = -1;
else
{
if (! CHARSETP (XCDR (val)))
goto invalid_entry;
repertory_id = XINT (CHARSET_SYMBOL_ID (XCDR (val)));
}
}
else
goto invalid_entry;
val = Fcons (make_number (encoding_id), make_number (repertory_id));
x_font_charset_alist
= nconc2 (x_font_charset_alist, Fcons (Fcons (registry, val), Qnil));
}
if (encoding)
*encoding = CHARSET_FROM_ID (encoding_id);
if (repertory)
*repertory = repertory_id >= 0 ? CHARSET_FROM_ID (repertory_id) : NULL;
return 0;
invalid_entry:
x_font_charset_alist
= nconc2 (x_font_charset_alist, Fcons (Fcons (registry, Qnil), Qnil));
return -1;
}
static Lisp_Object xfont_get_cache P_ ((Lisp_Object));
static int xfont_parse_name P_ ((FRAME_PTR, char *, Lisp_Object));
static Lisp_Object xfont_list P_ ((Lisp_Object, Lisp_Object));
static Lisp_Object xfont_list_family P_ ((Lisp_Object));
static struct font *xfont_open P_ ((FRAME_PTR, Lisp_Object, int));
static void xfont_close P_ ((FRAME_PTR, struct font *));
static int xfont_prepare_face P_ ((FRAME_PTR, struct face *));
#if 0
static void xfont_done_face P_ ((FRAME_PTR, struct face *));
#endif
static int xfont_has_char P_ ((Lisp_Object, int));
static unsigned xfont_encode_char P_ ((struct font *, int));
static int xfont_text_extents P_ ((struct font *, unsigned *, int,
struct font_metrics *));
static int xfont_draw P_ ((struct glyph_string *, int, int, int, int, int));
struct font_driver xfont_driver =
{
(Lisp_Object) NULL, /* Qx */
xfont_get_cache,
xfont_parse_name,
xfont_list,
xfont_list_family,
NULL,
xfont_open,
xfont_close,
xfont_prepare_face,
NULL /*xfont_done_face*/,
xfont_has_char,
xfont_encode_char,
xfont_text_extents,
xfont_draw,
};
extern Lisp_Object QCname;
static Lisp_Object
xfont_get_cache (frame)
Lisp_Object frame;
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (frame));
return (dpyinfo->name_list_element);
}
static int
xfont_parse_name (f, name, spec)
FRAME_PTR f;
char *name;
Lisp_Object spec;
{
if (font_parse_xlfd (name, spec, 0) >= 0)
return 0;
name = xfont_query_font (FRAME_X_DISPLAY (f), name, spec);
if (name)
{
XFree (name);
return 0;
}
return -1;
}
extern Lisp_Object Vface_alternative_font_registry_alist;
static Lisp_Object
xfont_list (frame, spec)
Lisp_Object frame, spec;
{
FRAME_PTR f = XFRAME (frame);
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
Lisp_Object *vec, val, extra, font_name, entity;
char name[256], **names;
int i, idx, limit, num_fonts;
int error_occurred = 0;
USE_SAFE_ALLOCA;
extra = AREF (spec, FONT_EXTRA_INDEX);
font_name = Qnil;
if (CONSP (extra))
{
val = Fassq (QCotf, extra);
if (! NILP (val))
return null_vector;
val = Fassq (QCname, extra);
if (CONSP (val))
font_name = XCDR (val);
}
if (! STRINGP (font_name)
&& font_unparse_xlfd (spec, 0, name, 256) < 0)
return null_vector;
BLOCK_INPUT;
x_catch_errors (dpyinfo->display);
if (STRINGP (font_name))
{
XFontStruct *font = XLoadQueryFont (dpyinfo->display,
(char *) SDATA (font_name));
unsigned long value;
num_fonts = 0;
if (x_had_errors_p (dpyinfo->display))
{
/* This error is perhaps due to insufficient memory on X
server. Let's just ignore it. */
font = NULL;
error_occurred = 1;
x_clear_errors (dpyinfo->display);
}
if (font)
{
if (XGetFontProperty (font, XA_FONT, &value))
{
char *n = (char *) XGetAtomName (dpyinfo->display, (Atom) value);
int len = strlen (n);
char *tmp;
/* If DXPC (a Differential X Protocol Compressor)
Ver.3.7 is running, XGetAtomName will return null
string. We must avoid such a name. */
if (len > 0)
{
num_fonts = 1;
names = (char **) alloca (sizeof (char *));
/* Some systems only allow alloca assigned to a
simple var. */
tmp = (char *) alloca (len + 1); names[0] = tmp;
bcopy (n, names[0], len + 1);
}
XFree (n);
}
XFreeFont (dpyinfo->display, font);
}
}
else
{
Lisp_Object registry = AREF (spec, FONT_REGISTRY_INDEX);
Lisp_Object alter = Qnil;
char *r = NULL;
if (! NILP (registry))
alter = Fassoc_string (SYMBOL_NAME (registry),
Vface_alternative_font_registry_alist);
while (1)
{
for (limit = 512, num_fonts = 0; ; limit *= 2)
{
names = XListFonts (dpyinfo->display, name, limit, &num_fonts);
if (x_had_errors_p (dpyinfo->display))
{
/* This error is perhaps due to insufficient memory
on X server. Let's just ignore it. */
x_clear_errors (dpyinfo->display);
error_occurred = 1;
num_fonts = 0;
break;
}
if (num_fonts < limit)
break;
XFreeFontNames (names);
}
if (num_fonts > 0
|| NILP (alter))
break;
/* Setup for trying alternatives. */
if (! r
&& ! (r = strstr (name, (char *) SDATA (SYMBOL_NAME (registry)))))
abort ();
while (1)
{
registry = Qnil;
alter = XCDR (alter);
if (NILP (alter))
break;
registry = XCAR (alter);
if ((r - name) + SBYTES (registry) < 255)
break;
}
if (NILP (registry))
break;
bcopy (SDATA (registry), r, SBYTES (registry));
}
}
x_uncatch_errors ();
UNBLOCK_INPUT;
if (error_occurred)
return Qnil;
if (num_fonts == 0)
return null_vector;
entity = Fmake_vector (make_number (FONT_ENTITY_MAX), Qnil);
ASET (entity, FONT_TYPE_INDEX, Qx);
ASET (entity, FONT_FRAME_INDEX, frame);
SAFE_ALLOCA_LISP (vec, num_fonts);
for (i = idx = 0; i < num_fonts; i++)
{
if (font_parse_xlfd (names[i], entity, 0) > 0)
vec[idx++] = Fcopy_sequence (entity);
}
if (! STRINGP (font_name))
{
BLOCK_INPUT;
XFreeFontNames (names);
UNBLOCK_INPUT;
}
val = Fvector (idx, vec);
SAFE_FREE ();
return val;
}
static int
memq_no_quit (elt, list)
Lisp_Object elt, list;
{
while (CONSP (list) && ! EQ (XCAR (list), elt))
list = XCDR (list);
return (CONSP (list));
}
static Lisp_Object
xfont_list_family (frame)
{
FRAME_PTR f = XFRAME (frame);
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
char **names;
int num_fonts, i;
Lisp_Object list;
char *last_family;
int last_len;
BLOCK_INPUT;
x_catch_errors (dpyinfo->display);
names = XListFonts (dpyinfo->display, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*",
0x8000, &num_fonts);
if (x_had_errors_p (dpyinfo->display))
{
/* This error is perhaps due to insufficient memory on X server.
Let's just ignore it. */
x_clear_errors (dpyinfo->display);
num_fonts = 0;
}
list = Qnil;
for (i = 0, last_len = 0; i < num_fonts; i++)
{
char *p0 = names[i], *p1;
Lisp_Object family;
p0++; /* skip the leading '-' */
while (*p0 && *p0 != '-') p0++; /* skip foundry */
if (! *p0)
continue;
p1 = ++p0;
while (*p1 && *p1 != '-') p1++; /* find the end of family */
if (! *p1 || p1 == p0)
continue;
if (last_len == p1 - p0
&& bcmp (last_family, p0, last_len) == 0)
continue;
last_len = p1 - p0;
last_family = p0;
family = intern_downcase (p0, last_len);
if (! memq_no_quit (family, list))
list = Fcons (family, list);
}
XFreeFontNames (names);
x_uncatch_errors ();
UNBLOCK_INPUT;
return list;
}
static struct font *
xfont_open (f, entity, pixel_size)
FRAME_PTR f;
Lisp_Object entity;
int pixel_size;
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
Display *display = dpyinfo->display;
char name[256];
int len;
unsigned long value;
Lisp_Object registry;
struct charset *encoding, *repertory;
struct font *font;
XFontStruct *xfont;
/* At first, check if we know how to encode characters for this
font. */
registry = AREF (entity, FONT_REGISTRY_INDEX);
if (xfont_registry_charsets (registry, &encoding, &repertory) < 0)
return NULL;
if (XINT (AREF (entity, FONT_SIZE_INDEX)) != 0)
pixel_size = XINT (AREF (entity, FONT_SIZE_INDEX));
len = font_unparse_xlfd (entity, pixel_size, name, 256);
if (len <= 0)
return NULL;
BLOCK_INPUT;
x_catch_errors (display);
xfont = XLoadQueryFont (display, name);
if (x_had_errors_p (display))
{
/* This error is perhaps due to insufficient memory on X server.
Let's just ignore it. */
x_clear_errors (display);
xfont = NULL;
}
x_uncatch_errors ();
UNBLOCK_INPUT;
if (! xfont)
return NULL;
font = malloc (sizeof (struct font));
font->font.font = xfont;
font->entity = entity;
font->pixel_size = pixel_size;
font->driver = &xfont_driver;
font->font.name = malloc (len + 1);
if (! font->font.name)
{
XFreeFont (display, xfont);
free (font);
return NULL;
}
bcopy (name, font->font.name, len + 1);
font->font.charset = encoding->id;
font->encoding_charset = encoding->id;
font->repertory_charet = repertory ? repertory->id : -1;
font->ascent = xfont->ascent;
font->descent = xfont->descent;
if (xfont->min_bounds.width == xfont->max_bounds.width)
{
/* Fixed width font. */
font->font.average_width = font->font.space_width
= xfont->min_bounds.width;
}
else
{
XChar2b char2b;
XCharStruct *pcm;
char2b.byte1 = 0x00, char2b.byte2 = 0x20;
pcm = xfont_get_pcm (xfont, &char2b);
if (pcm)
font->font.space_width = pcm->width;
else
font->font.space_width = xfont->max_bounds.width;
font->font.average_width
= (XGetFontProperty (xfont, dpyinfo->Xatom_AVERAGE_WIDTH, &value)
? (long) value / 10 : 0);
if (font->font.average_width < 0)
font->font.average_width = - font->font.average_width;
if (font->font.average_width == 0)
{
if (pcm)
{
int width = pcm->width;
for (char2b.byte2 = 33; char2b.byte2 <= 126; char2b.byte2++)
if ((pcm = xfont_get_pcm (xfont, &char2b)) != NULL)
width += pcm->width;
font->font.average_width = width / 95;
}
else
font->font.average_width = xfont->max_bounds.width;
}
}
font->min_width = xfont->min_bounds.width;
if (font->min_width <= 0)
font->min_width = font->font.space_width;
BLOCK_INPUT;
/* Try to get the full name of FONT. Put it in FULL_NAME. */
if (XGetFontProperty (xfont, XA_FONT, &value))
{
char *full_name = NULL, *p0, *p;
int dashes = 0;
p0 = p = (char *) XGetAtomName (FRAME_X_DISPLAY (f), (Atom) value);;
/* Count the number of dashes in the "full name".
If it is too few, this isn't really the font's full name,
so don't use it.
In X11R4, the fonts did not come with their canonical names
stored in them. */
while (*p)
{
if (*p == '-')
dashes++;
p++;
}
if (dashes >= 13)
{
full_name = (char *) malloc (p - p0 + 1);
if (full_name)
bcopy (p0, full_name, p - p0 + 1);
}
XFree (p0);
if (full_name)
font->font.full_name = full_name;
else
font->font.full_name = font->font.name;
}
font->file_name = NULL;
font->font.size = xfont->max_bounds.width;
font->font.height = xfont->ascent + xfont->descent;
font->font.baseline_offset
= (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_BASELINE_OFFSET, &value)
? (long) value : 0);
font->font.relative_compose
= (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_RELATIVE_COMPOSE, &value)
? (long) value : 0);
font->font.default_ascent
= (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_DEFAULT_ASCENT, &value)
? (long) value : 0);
font->font.vertical_centering
= (STRINGP (Vvertical_centering_font_regexp)
&& (fast_c_string_match_ignore_case
(Vvertical_centering_font_regexp, font->font.full_name) >= 0));
UNBLOCK_INPUT;
dpyinfo->n_fonts++;
/* Set global flag fonts_changed_p to non-zero if the font loaded
has a character with a smaller width than any other character
before, or if the font loaded has a smaller height than any other
font loaded before. If this happens, it will make a glyph matrix
reallocation necessary. */
if (dpyinfo->n_fonts == 1)
{
dpyinfo->smallest_font_height = font->font.height;
dpyinfo->smallest_char_width = font->min_width;
fonts_changed_p = 1;
}
else
{
if (dpyinfo->smallest_font_height > font->font.height)
dpyinfo->smallest_font_height = font->font.height, fonts_changed_p |= 1;
if (dpyinfo->smallest_char_width > font->min_width)
dpyinfo->smallest_char_width = font->min_width, fonts_changed_p |= 1;
}
return font;
}
static void
xfont_close (f, font)
FRAME_PTR f;
struct font *font;
{
BLOCK_INPUT;
XFreeFont (FRAME_X_DISPLAY (f), font->font.font);
UNBLOCK_INPUT;
if (font->font.name != font->font.full_name)
free (font->font.full_name);
free (font->font.name);
free (font);
FRAME_X_DISPLAY_INFO (f)->n_fonts--;
}
static int
xfont_prepare_face (f, face)
FRAME_PTR f;
struct face *face;
{
BLOCK_INPUT;
XSetFont (FRAME_X_DISPLAY (f), face->gc, face->font->fid);
UNBLOCK_INPUT;
return 0;
}
#if 0
static void
xfont_done_face (f, face)
FRAME_PTR f;
struct face *face;
{
if (face->extra)
{
BLOCK_INPUT;
XFreeGC (FRAME_X_DISPLAY (f), (GC) face->extra);
UNBLOCK_INPUT;
face->extra = NULL;
}
}
#endif /* 0 */
static int
xfont_has_char (entity, c)
Lisp_Object entity;
int c;
{
Lisp_Object registry = AREF (entity, FONT_REGISTRY_INDEX);
struct charset *repertory;
if (xfont_registry_charsets (registry, NULL, &repertory) < 0)
return -1;
if (! repertory)
return -1;
return (ENCODE_CHAR (repertory, c) != CHARSET_INVALID_CODE (repertory));
}
static unsigned
xfont_encode_char (font, c)
struct font *font;
int c;
{
struct charset *charset;
unsigned code;
XChar2b char2b;
charset = CHARSET_FROM_ID (font->encoding_charset);
code = ENCODE_CHAR (charset, c);
if (code == CHARSET_INVALID_CODE (charset))
return 0xFFFFFFFF;
if (font->repertory_charet >= 0)
{
charset = CHARSET_FROM_ID (font->repertory_charet);
return (ENCODE_CHAR (charset, c) != CHARSET_INVALID_CODE (charset)
? code : 0xFFFFFFFF);
}
char2b.byte1 = code >> 16;
char2b.byte2 = code & 0xFFFF;
return (xfont_get_pcm (font->font.font, &char2b) ? code : 0xFFFFFFFF);
}
static int
xfont_text_extents (font, code, nglyphs, metrics)
struct font *font;
unsigned *code;
int nglyphs;
struct font_metrics *metrics;
{
int width = 0;
int i, x;
if (metrics)
bzero (metrics, sizeof (struct font_metrics));
for (i = 0, x = 0; i < nglyphs; i++)
{
XChar2b char2b;
static XCharStruct *pcm;
if (code[i] >= 0x10000)
continue;
char2b.byte1 = code[i] >> 8, char2b.byte2 = code[i] & 0xFF;
pcm = xfont_get_pcm (font->font.font, &char2b);
if (! pcm)
continue;
if (metrics->lbearing > width + pcm->lbearing)
metrics->lbearing = width + pcm->lbearing;
if (metrics->rbearing < width + pcm->rbearing)
metrics->rbearing = width + pcm->rbearing;
if (metrics->ascent < pcm->ascent)
metrics->ascent = pcm->ascent;
if (metrics->descent < pcm->descent)
metrics->descent = pcm->descent;
width += pcm->width;
}
if (metrics)
metrics->width = width;
return width;
}
static int
xfont_draw (s, from, to, x, y, with_background)
struct glyph_string *s;
int from, to, x, y, with_background;
{
XFontStruct *xfont = s->face->font;
int len = to - from;
if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0)
{
char *str;
int i;
USE_SAFE_ALLOCA;
SAFE_ALLOCA (str, char *, len);
for (i = 0; i < len ; i++)
str[i] = XCHAR2B_BYTE2 (s->char2b + from + i);
if (with_background > 0)
XDrawImageString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f),
s->gc, x, y, str, len);
else
XDrawString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f),
s->gc, x, y, str, len);
SAFE_FREE ();
return s->nchars;
}
if (with_background > 0)
XDrawImageString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f),
s->gc, x, y, s->char2b + from, len);
else
XDrawString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f),
s->gc, x, y, s->char2b + from, len);
return len;
}
void
syms_of_xfont ()
{
staticpro (&x_font_charset_alist);
x_font_charset_alist = Qnil;
DEFSYM (Qx, "x");
xfont_driver.type = Qx;
register_font_driver (&xfont_driver, NULL);
}

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/* xftfont.c -- XFT font driver.
Copyright (C) 2006 Free Software Foundation, Inc.
Copyright (C) 2006
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs 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 2, or (at your option)
any later version.
GNU Emacs 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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <config.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xft/Xft.h>
#include "lisp.h"
#include "dispextern.h"
#include "xterm.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "fontset.h"
#include "font.h"
/* Xft font driver. */
static Lisp_Object Qxft;
/* The actual structure for Xft font that can be casted to struct
font. */
struct xftfont_info
{
struct font font;
Display *display;
int screen;
XftFont *xftfont;
FT_Face ft_face;
};
/* Structure pointed by (struct face *)->extra */
struct xftface_info
{
XftColor xft_fg;
XftColor xft_bg;
XftDraw *xft_draw;
};
static void xftfont_get_colors P_ ((FRAME_PTR, struct face *, GC gc,
struct xftface_info *,
XftColor *fg, XftColor *bg));
static Font xftfont_default_fid P_ ((FRAME_PTR));
/* Setup colors pointed by FG and BG for GC. If XFTFACE_INFO is not
NULL, reuse the colors in it if possible. BG may be NULL. */
static void
xftfont_get_colors (f, face, gc, xftface_info, fg, bg)
FRAME_PTR f;
struct face *face;
GC gc;
struct xftface_info *xftface_info;
XftColor *fg, *bg;
{
if (xftface_info && face->gc == gc)
{
*fg = xftface_info->xft_fg;
if (bg)
*bg = xftface_info->xft_bg;
}
else
{
XGCValues xgcv;
int fg_done = 0, bg_done = 0;
BLOCK_INPUT;
XGetGCValues (FRAME_X_DISPLAY (f), gc,
GCForeground | GCBackground, &xgcv);
if (xftface_info)
{
if (xgcv.foreground == face->foreground)
*fg = xftface_info->xft_fg, fg_done = 1;
else if (xgcv.foreground == face->background)
*fg = xftface_info->xft_bg, fg_done = 1;
if (! bg)
bg_done = 1;
else if (xgcv.background == face->background)
*bg = xftface_info->xft_bg, bg_done = 1;
else if (xgcv.background == face->foreground)
*bg = xftface_info->xft_fg, bg_done = 1;
}
if (fg_done + bg_done < 2)
{
XColor colors[2];
colors[0].pixel = fg->pixel = xgcv.foreground;
if (bg)
colors[1].pixel = bg->pixel = xgcv.background;
XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors,
bg ? 2 : 1);
fg->color.alpha = 0xFFFF;
fg->color.red = colors[0].red;
fg->color.green = colors[0].green;
fg->color.blue = colors[0].blue;
if (bg)
{
bg->color.alpha = 0xFFFF;
bg->color.red = colors[1].red;
bg->color.green = colors[1].green;
bg->color.blue = colors[1].blue;
}
}
UNBLOCK_INPUT;
}
}
/* Return the default Font ID on frame F. */
static Font
xftfont_default_fid (f)
FRAME_PTR f;
{
static int fid_known;
static Font fid;
if (! fid_known)
{
fid = XLoadFont (FRAME_X_DISPLAY (f), "fixed");
if (! fid)
{
fid = XLoadFont (FRAME_X_DISPLAY (f), "*");
if (! fid)
abort ();
}
}
return fid;
}
static Lisp_Object xftfont_list P_ ((Lisp_Object, Lisp_Object));
static struct font *xftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
static void xftfont_close P_ ((FRAME_PTR, struct font *));
static int xftfont_prepare_face P_ ((FRAME_PTR, struct face *));
static void xftfont_done_face P_ ((FRAME_PTR, struct face *));
static unsigned xftfont_encode_char P_ ((struct font *, int));
static int xftfont_text_extents P_ ((struct font *, unsigned *, int,
struct font_metrics *));
static int xftfont_draw P_ ((struct glyph_string *, int, int, int, int, int));
static int xftfont_anchor_point P_ ((struct font *, unsigned, int,
int *, int *));
struct font_driver xftfont_driver;
static Lisp_Object
xftfont_list (frame, spec)
Lisp_Object frame;
Lisp_Object spec;
{
Lisp_Object val = ftfont_driver.list (frame, spec);
if (! NILP (val))
{
int i;
for (i = 0; i < ASIZE (val); i++)
ASET (AREF (val, i), FONT_TYPE_INDEX, Qxft);
}
return val;
}
static FcChar8 ascii_printable[95];
static struct font *
xftfont_open (f, entity, pixel_size)
FRAME_PTR f;
Lisp_Object entity;
int pixel_size;
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
Display *display = FRAME_X_DISPLAY (f);
Lisp_Object val;
FcPattern *pattern, *pat;
FcChar8 *file;
XFontStruct *xfont;
struct xftfont_info *xftfont_info;
struct font *font;
double size = 0;
XftFont *xftfont;
int spacing;
val = AREF (entity, FONT_EXTRA_INDEX);
if (XTYPE (val) != Lisp_Misc
|| XMISCTYPE (val) != Lisp_Misc_Save_Value)
return NULL;
pattern = XSAVE_VALUE (val)->pointer;
if (FcPatternGetString (pattern, FC_FILE, 0, &file) != FcResultMatch)
return NULL;
size = XINT (AREF (entity, FONT_SIZE_INDEX));
if (size == 0)
size = pixel_size;
pat = FcPatternCreate ();
FcPatternAddString (pat, FC_FILE, file);
FcPatternAddDouble (pat, FC_PIXEL_SIZE, pixel_size);
FcPatternAddBool (pat, FC_ANTIALIAS, FcTrue);
xftfont = XftFontOpenPattern (display, pat);
/* We should not destroy PAT here because it is kept in XFTFONT and
destroyed automatically when XFTFONT is closed. */
if (! xftfont)
return NULL;
xftfont_info = malloc (sizeof (struct xftfont_info));
if (! xftfont_info)
{
XftFontClose (display, xftfont);
return NULL;
}
xfont = malloc (sizeof (XFontStruct));
if (! xftfont_info)
{
XftFontClose (display, xftfont);
free (xftfont_info);
return NULL;
}
xftfont_info->display = display;
xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f);
xftfont_info->xftfont = xftfont;
xftfont_info->ft_face = XftLockFace (xftfont);
font = (struct font *) xftfont_info;
font->entity = entity;
font->pixel_size = size;
font->driver = &xftfont_driver;
font->font.name = font->font.full_name = NULL;
font->file_name = (char *) file;
font->font.size = xftfont->max_advance_width;
font->ascent = xftfont->ascent;
font->descent = xftfont->descent;
font->font.height = xftfont->ascent + xftfont->descent;
if (FcPatternGetInteger (xftfont->pattern, FC_SPACING, 0, &spacing)
!= FcResultMatch)
spacing = FC_PROPORTIONAL;
if (spacing != FC_PROPORTIONAL)
font->font.average_width = font->font.space_width
= xftfont->max_advance_width;
else
{
XGlyphInfo extents;
if (! ascii_printable[0])
{
int i;
for (i = 0; i < 95; i++)
ascii_printable[i] = ' ' + i;
}
XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents);
font->font.space_width = extents.xOff;
if (font->font.space_width <= 0)
/* dirty workaround */
font->font.space_width = pixel_size;
XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
font->font.average_width = (font->font.space_width + extents.xOff) / 95;
}
/* Unfortunately Xft doesn't provide a way to get minimum char
width. So, we use space_width instead. */
font->min_width = font->font.space_width;
font->font.baseline_offset = 0;
font->font.relative_compose = 0;
font->font.default_ascent = 0;
font->font.vertical_centering = 0;
/* Setup pseudo XFontStruct */
xfont->fid = xftfont_default_fid (f);
xfont->ascent = xftfont->ascent;
xfont->descent = xftfont->descent;
xfont->max_bounds.descent = xftfont->descent;
xfont->max_bounds.width = xftfont->max_advance_width;
xfont->min_bounds.width = font->font.space_width;
font->font.font = xfont;
dpyinfo->n_fonts++;
/* Set global flag fonts_changed_p to non-zero if the font loaded
has a character with a smaller width than any other character
before, or if the font loaded has a smaller height than any other
font loaded before. If this happens, it will make a glyph matrix
reallocation necessary. */
if (dpyinfo->n_fonts == 1)
{
dpyinfo->smallest_font_height = font->font.height;
dpyinfo->smallest_char_width = font->min_width;
fonts_changed_p = 1;
}
else
{
if (dpyinfo->smallest_font_height > font->font.height)
dpyinfo->smallest_font_height = font->font.height,
fonts_changed_p |= 1;
if (dpyinfo->smallest_char_width > font->min_width)
dpyinfo->smallest_char_width = font->min_width,
fonts_changed_p |= 1;
}
return font;
}
static void
xftfont_close (f, font)
FRAME_PTR f;
struct font *font;
{
struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
XftUnlockFace (xftfont_info->xftfont);
XftFontClose (xftfont_info->display, xftfont_info->xftfont);
free (font);
FRAME_X_DISPLAY_INFO (f)->n_fonts--;
}
struct xftdraw_list
{
XftDraw *xftdraw;
struct xftdraw_list *next;
};
static struct xftdraw_list *xftdraw_list;
static void
register_xftdraw (xftdraw)
XftDraw *xftdraw;
{
struct xftdraw_list *list = malloc (sizeof (struct xftdraw_list));
list->xftdraw = xftdraw;
list->next = xftdraw_list;
xftdraw_list = list;
}
static void
check_xftdraw (xftdraw)
XftDraw *xftdraw;
{
struct xftdraw_list *list, *prev;
for (list = xftdraw_list, prev = NULL; list; prev = list, list = list->next)
{
if (list->xftdraw == xftdraw)
{
if (! prev)
{
list = xftdraw_list->next;
free (xftdraw_list);
xftdraw_list = list;
}
else
{
prev->next = list->next;
free (list);
list = prev;
}
return;
}
}
abort ();
}
static int
xftfont_prepare_face (f, face)
FRAME_PTR f;
struct face *face;
{
struct xftface_info *xftface_info = malloc (sizeof (struct xftface_info));
if (! xftface_info)
return -1;
BLOCK_INPUT;
xftface_info->xft_draw = XftDrawCreate (FRAME_X_DISPLAY (f),
FRAME_X_WINDOW (f),
FRAME_X_VISUAL (f),
FRAME_X_COLORMAP (f));
register_xftdraw (xftface_info->xft_draw);
xftfont_get_colors (f, face, face->gc, NULL,
&xftface_info->xft_fg, &xftface_info->xft_bg);
UNBLOCK_INPUT;
face->extra = xftface_info;
return 0;
}
static void
xftfont_done_face (f, face)
FRAME_PTR f;
struct face *face;
{
struct xftface_info *xftface_info = (struct xftface_info *) face->extra;
if (xftface_info)
{
BLOCK_INPUT;
check_xftdraw (xftface_info->xft_draw);
XftDrawDestroy (xftface_info->xft_draw);
UNBLOCK_INPUT;
free (xftface_info);
face->extra = NULL;
}
}
static unsigned
xftfont_encode_char (font, c)
struct font *font;
int c;
{
struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
(FcChar32) c);
return (code ? code : 0xFFFFFFFF);
}
static int
xftfont_text_extents (font, code, nglyphs, metrics)
struct font *font;
unsigned *code;
int nglyphs;
struct font_metrics *metrics;
{
struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
XGlyphInfo extents;
BLOCK_INPUT;
XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
&extents);
UNBLOCK_INPUT;
if (metrics)
{
metrics->lbearing = - extents.x;
metrics->rbearing = - extents.x + extents.width;
metrics->width = extents.xOff;
metrics->ascent = extents.y;
metrics->descent = extents.y - extents.height;
}
return extents.xOff;
}
static int
xftfont_draw (s, from, to, x, y, with_background)
struct glyph_string *s;
int from, to, x, y, with_background;
{
FRAME_PTR f = s->f;
struct face *face = s->face;
struct xftfont_info *xftfont_info = (struct xftfont_info *) face->font_info;
struct xftface_info *xftface_info = (struct xftface_info *) face->extra;
FT_UInt *code;
XftColor fg, bg;
XRectangle r;
int len = to - from;
int i;
xftfont_get_colors (f, face, s->gc, xftface_info,
&fg, s->width ? &bg : NULL);
BLOCK_INPUT;
if (s->clip_width)
{
r.x = s->clip_x, r.width = s->clip_width;
r.y = s->clip_y, r.height = s->clip_height;
XftDrawSetClipRectangles (xftface_info->xft_draw, 0, 0, &r, 1);
}
if (with_background)
{
struct font *font = (struct font *) face->font_info;
XftDrawRect (xftface_info->xft_draw, &bg,
x, y - face->font->ascent, s->width, font->font.height);
}
code = alloca (sizeof (FT_UInt) * len);
for (i = 0; i < len; i++)
code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
| XCHAR2B_BYTE2 (s->char2b + from + i));
XftDrawGlyphs (xftface_info->xft_draw, &fg, xftfont_info->xftfont,
x, y, code, len);
if (s->clip_width)
XftDrawSetClip (xftface_info->xft_draw, NULL);
UNBLOCK_INPUT;
return len;
}
static int
xftfont_anchor_point (font, code, index, x, y)
struct font *font;
unsigned code;
int index;
int *x, *y;
{
struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
FT_Face ft_face = xftfont_info->ft_face;
if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
return -1;
if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
return -1;
if (index >= ft_face->glyph->outline.n_points)
return -1;
*x = ft_face->glyph->outline.points[index].x;
*y = ft_face->glyph->outline.points[index].y;
return 0;
}
void
syms_of_xftfont ()
{
DEFSYM (Qxft, "xft");
xftfont_driver = ftfont_driver;
xftfont_driver.type = Qxft;
xftfont_driver.get_cache = xfont_driver.get_cache;
xftfont_driver.list = xftfont_list;
xftfont_driver.open = xftfont_open;
xftfont_driver.close = xftfont_close;
xftfont_driver.prepare_face = xftfont_prepare_face;
xftfont_driver.done_face = xftfont_done_face;
xftfont_driver.encode_char = xftfont_encode_char;
xftfont_driver.text_extents = xftfont_text_extents;
xftfont_driver.draw = xftfont_draw;
xftfont_driver.anchor_point = xftfont_anchor_point;
register_font_driver (&xftfont_driver, NULL);
}