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Aegisub/aegisub/libass/ass_fontconfig.c

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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of libass.
*
* libass 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 of the License, or
* (at your option) any later version.
*
* libass 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 libass; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include "ass_utils.h"
#include "ass.h"
#include "ass_library.h"
#include "ass_fontconfig.h"
#ifdef CONFIG_FONTCONFIG
#include <fontconfig/fontconfig.h>
#include <fontconfig/fcfreetype.h>
#endif
struct fc_instance {
#ifdef CONFIG_FONTCONFIG
FcConfig *config;
#endif
char *family_default;
char *path_default;
int index_default;
};
#ifdef CONFIG_FONTCONFIG
// 4yo fontconfig does not have these.
// They are only needed for debug output, anyway.
#ifndef FC_FULLNAME
#define FC_FULLNAME "fullname"
#endif
#ifndef FC_EMBOLDEN
#define FC_EMBOLDEN "embolden"
#endif
/**
* \brief Low-level font selection.
* \param priv private data
* \param family font family
* \param treat_family_as_pattern treat family as fontconfig pattern
* \param bold font weight value
* \param italic font slant value
* \param index out: font index inside a file
* \param code: the character that should be present in the font, can be 0
* \return font file path
*/
static char *_select_font(ASS_Library *library, FCInstance *priv,
const char *family, int treat_family_as_pattern,
unsigned bold, unsigned italic, int *index,
uint32_t code)
{
FcBool rc;
FcResult result;
FcPattern *pat = NULL, *rpat = NULL;
int r_index, r_slant, r_weight;
FcChar8 *r_family, *r_style, *r_file, *r_fullname;
FcBool r_outline, r_embolden;
FcCharSet *r_charset;
FcFontSet *fset = NULL;
int curf;
char *retval = NULL;
int family_cnt = 0;
*index = 0;
if (treat_family_as_pattern)
pat = FcNameParse((const FcChar8 *) family);
else
pat = FcPatternCreate();
if (!pat)
goto error;
if (!treat_family_as_pattern) {
FcPatternAddString(pat, FC_FAMILY, (const FcChar8 *) family);
// In SSA/ASS fonts are sometimes referenced by their "full name",
// which is usually a concatenation of family name and font
// style (ex. Ottawa Bold). Full name is available from
// FontConfig pattern element FC_FULLNAME, but it is never
// used for font matching.
// Therefore, I'm removing words from the end of the name one
// by one, and adding shortened names to the pattern. It seems
// that the first value (full name in this case) has
// precedence in matching.
// An alternative approach could be to reimplement FcFontSort
// using FC_FULLNAME instead of FC_FAMILY.
family_cnt = 1;
{
char *s = strdup(family);
char *p = s + strlen(s);
while (--p > s)
if (*p == ' ' || *p == '-') {
*p = '\0';
FcPatternAddString(pat, FC_FAMILY, (const FcChar8 *) s);
++family_cnt;
}
free(s);
}
}
FcPatternAddBool(pat, FC_OUTLINE, FcTrue);
FcPatternAddInteger(pat, FC_SLANT, italic);
FcPatternAddInteger(pat, FC_WEIGHT, bold);
FcDefaultSubstitute(pat);
rc = FcConfigSubstitute(priv->config, pat, FcMatchPattern);
if (!rc)
goto error;
fset = FcFontSort(priv->config, pat, FcTrue, NULL, &result);
if (!fset)
goto error;
for (curf = 0; curf < fset->nfont; ++curf) {
FcPattern *curp = fset->fonts[curf];
result = FcPatternGetBool(curp, FC_OUTLINE, 0, &r_outline);
if (result != FcResultMatch)
continue;
if (r_outline != FcTrue)
continue;
if (!code)
break;
result = FcPatternGetCharSet(curp, FC_CHARSET, 0, &r_charset);
if (result != FcResultMatch)
continue;
if (FcCharSetHasChar(r_charset, code))
break;
}
if (curf >= fset->nfont)
goto error;
#if (FC_VERSION >= 20297)
if (!treat_family_as_pattern) {
// Remove all extra family names from original pattern.
// After this, FcFontRenderPrepare will select the most relevant family
// name in case there are more than one of them.
for (; family_cnt > 1; --family_cnt)
FcPatternRemove(pat, FC_FAMILY, family_cnt - 1);
}
#endif
rpat = FcFontRenderPrepare(priv->config, pat, fset->fonts[curf]);
if (!rpat)
goto error;
result = FcPatternGetInteger(rpat, FC_INDEX, 0, &r_index);
if (result != FcResultMatch)
goto error;
*index = r_index;
result = FcPatternGetString(rpat, FC_FILE, 0, &r_file);
if (result != FcResultMatch)
goto error;
retval = strdup((const char *) r_file);
result = FcPatternGetString(rpat, FC_FAMILY, 0, &r_family);
if (result != FcResultMatch)
r_family = NULL;
result = FcPatternGetString(rpat, FC_FULLNAME, 0, &r_fullname);
if (result != FcResultMatch)
r_fullname = NULL;
if (!treat_family_as_pattern &&
!(r_family && strcasecmp((const char *) r_family, family) == 0) &&
!(r_fullname && strcasecmp((const char *) r_fullname, family) == 0))
ass_msg(library, MSGL_WARN,
"fontconfig: Selected font is not the requested one: "
"'%s' != '%s'",
(const char *) (r_fullname ? r_fullname : r_family), family);
result = FcPatternGetString(rpat, FC_STYLE, 0, &r_style);
if (result != FcResultMatch)
r_style = NULL;
result = FcPatternGetInteger(rpat, FC_SLANT, 0, &r_slant);
if (result != FcResultMatch)
r_slant = 0;
result = FcPatternGetInteger(rpat, FC_WEIGHT, 0, &r_weight);
if (result != FcResultMatch)
r_weight = 0;
result = FcPatternGetBool(rpat, FC_EMBOLDEN, 0, &r_embolden);
if (result != FcResultMatch)
r_embolden = 0;
ass_msg(library, MSGL_V,
"Font info: family '%s', style '%s', fullname '%s',"
" slant %d, weight %d%s", (const char *) r_family,
(const char *) r_style, (const char *) r_fullname, r_slant,
r_weight, r_embolden ? ", embolden" : "");
error:
if (pat)
FcPatternDestroy(pat);
if (rpat)
FcPatternDestroy(rpat);
if (fset)
FcFontSetDestroy(fset);
return retval;
}
/**
* \brief Find a font. Use default family or path if necessary.
* \param priv_ private data
* \param family font family
* \param treat_family_as_pattern treat family as fontconfig pattern
* \param bold font weight value
* \param italic font slant value
* \param index out: font index inside a file
* \param code: the character that should be present in the font, can be 0
* \return font file path
*/
char *fontconfig_select(ASS_Library *library, FCInstance *priv,
const char *family, int treat_family_as_pattern,
unsigned bold, unsigned italic, int *index,
uint32_t code)
{
char *res = 0;
if (!priv->config) {
*index = priv->index_default;
return priv->path_default;
}
if (family && *family)
res =
_select_font(library, priv, family, treat_family_as_pattern,
bold, italic, index, code);
if (!res && priv->family_default) {
res =
_select_font(library, priv, priv->family_default, 0, bold,
italic, index, code);
if (res)
ass_msg(library, MSGL_WARN, "fontconfig_select: Using default "
"font family: (%s, %d, %d) -> %s, %d",
family, bold, italic, res, *index);
}
if (!res && priv->path_default) {
res = priv->path_default;
*index = priv->index_default;
ass_msg(library, MSGL_WARN, "fontconfig_select: Using default font: "
"(%s, %d, %d) -> %s, %d", family, bold, italic,
res, *index);
}
if (!res) {
res = _select_font(library, priv, "Arial", 0, bold, italic,
index, code);
if (res)
ass_msg(library, MSGL_WARN, "fontconfig_select: Using 'Arial' "
"font family: (%s, %d, %d) -> %s, %d", family, bold,
italic, res, *index);
}
if (res)
ass_msg(library, MSGL_V,
"fontconfig_select: (%s, %d, %d) -> %s, %d", family, bold,
italic, res, *index);
return res;
}
#if (FC_VERSION < 20402)
static char *validate_fname(char *name)
{
char *fname;
char *p;
char *q;
unsigned code;
int sz = strlen(name);
q = fname = malloc(sz + 1);
p = name;
while (*p) {
code = ass_utf8_get_char(&p);
if (code == 0)
break;
if ((code > 0x7F) ||
(code == '\\') ||
(code == '/') ||
(code == ':') ||
(code == '*') ||
(code == '?') ||
(code == '<') ||
(code == '>') || (code == '|') || (code == 0)) {
*q++ = '_';
} else {
*q++ = code;
}
if (p - name > sz)
break;
}
*q = 0;
return fname;
}
#endif
/**
* \brief Process memory font.
* \param priv private data
* \param library library object
* \param ftlibrary freetype library object
* \param idx index of the processed font in library->fontdata
* With FontConfig >= 2.4.2, builds a font pattern in memory via FT_New_Memory_Face/FcFreeTypeQueryFace.
* With older FontConfig versions, save the font to ~/.mplayer/fonts.
*/
static void process_fontdata(FCInstance *priv, ASS_Library *library,
FT_Library ftlibrary, int idx)
{
int rc;
const char *name = library->fontdata[idx].name;
const char *data = library->fontdata[idx].data;
int data_size = library->fontdata[idx].size;
#if (FC_VERSION < 20402)
struct stat st;
char *fname;
const char *fonts_dir = library->fonts_dir;
char buf[1000];
FILE *fp = NULL;
if (!fonts_dir)
return;
rc = stat(fonts_dir, &st);
if (rc) {
int res;
#ifndef __MINGW32__
res = mkdir(fonts_dir, 0700);
#else
res = mkdir(fonts_dir);
#endif
if (res) {
ass_msg(library, MSGL_WARN, "Failed to create directory '%s'",
fonts_dir);
}
} else if (!S_ISDIR(st.st_mode)) {
ass_msg(library, MSGL_WARN, "Not a directory: '%s'", fonts_dir);
}
fname = validate_fname((char *) name);
snprintf(buf, 1000, "%s/%s", fonts_dir, fname);
free(fname);
fp = fopen(buf, "wb");
if (!fp)
return;
fwrite(data, data_size, 1, fp);
fclose(fp);
#else // (FC_VERSION >= 20402)
FT_Face face;
FcPattern *pattern;
FcFontSet *fset;
FcBool res;
int face_index, num_faces = 1;
for (face_index = 0; face_index < num_faces; ++face_index) {
rc = FT_New_Memory_Face(ftlibrary, (unsigned char *) data,
data_size, face_index, &face);
if (rc) {
ass_msg(library, MSGL_WARN, "Error opening memory font: %s",
name);
return;
}
num_faces = face->num_faces;
pattern =
FcFreeTypeQueryFace(face, (unsigned char *) name, 0,
FcConfigGetBlanks(priv->config));
if (!pattern) {
ass_msg(library, MSGL_WARN, "%s failed", "FcFreeTypeQueryFace");
FT_Done_Face(face);
return;
}
fset = FcConfigGetFonts(priv->config, FcSetSystem); // somehow it failes when asked for FcSetApplication
if (!fset) {
ass_msg(library, MSGL_WARN, "%s failed", "FcConfigGetFonts");
FT_Done_Face(face);
return;
}
res = FcFontSetAdd(fset, pattern);
if (!res) {
ass_msg(library, MSGL_WARN, "%s failed", "FcFontSetAdd");
FT_Done_Face(face);
return;
}
FT_Done_Face(face);
}
#endif
}
/**
* \brief Init fontconfig.
* \param library libass library object
* \param ftlibrary freetype library object
* \param family default font family
* \param path default font path
* \param fc whether fontconfig should be used
* \param config path to a fontconfig configuration file, or NULL
* \param update whether the fontconfig cache should be built/updated
* \return pointer to fontconfig private data
*/
FCInstance *fontconfig_init(ASS_Library *library,
FT_Library ftlibrary, const char *family,
const char *path, int fc, const char *config,
int update)
{
int rc;
FCInstance *priv = calloc(1, sizeof(FCInstance));
const char *dir = library->fonts_dir;
int i;
if (!fc) {
ass_msg(library, MSGL_WARN,
"Fontconfig disabled, only default font will be used.");
goto exit;
}
priv->config = FcConfigCreate();
rc = FcConfigParseAndLoad(priv->config, (unsigned char *) config, FcTrue);
if (!rc) {
ass_msg(library, MSGL_WARN, "No usable fontconfig configuration "
"file found, using fallback.");
FcConfigDestroy(priv->config);
priv->config = FcInitLoadConfig();
rc++;
}
if (rc && update) {
FcConfigBuildFonts(priv->config);
}
if (!rc || !priv->config) {
ass_msg(library, MSGL_FATAL,
"No valid fontconfig configuration found!");
FcConfigDestroy(priv->config);
goto exit;
}
for (i = 0; i < library->num_fontdata; ++i)
process_fontdata(priv, library, ftlibrary, i);
if (dir) {
if (FcDirCacheValid((const FcChar8 *) dir) == FcFalse) {
ass_msg(library, MSGL_INFO, "Updating font cache");
if (FcGetVersion() >= 20390 && FcGetVersion() < 20400)
ass_msg(library, MSGL_WARN, "Beta versions of fontconfig"
"are not supported. Update before reporting any bugs");
// FontConfig >= 2.4.0 updates cache automatically in FcConfigAppFontAddDir()
if (FcGetVersion() < 20390) {
FcFontSet *fcs;
FcStrSet *fss;
fcs = FcFontSetCreate();
fss = FcStrSetCreate();
rc = FcStrSetAdd(fss, (const FcChar8 *) dir);
if (!rc) {
ass_msg(library, MSGL_WARN, "%s failed", "FcStrSetAdd");
goto ErrorFontCache;
}
rc = FcDirScan(fcs, fss, NULL,
FcConfigGetBlanks(priv->config),
(const FcChar8 *) dir, FcFalse);
if (!rc) {
ass_msg(library, MSGL_WARN, "%s failed", "FcDirScan");
goto ErrorFontCache;
}
rc = FcDirSave(fcs, fss, (const FcChar8 *) dir);
if (!rc) {
ass_msg(library, MSGL_WARN, "%s failed", "FcDirSave");
goto ErrorFontCache;
}
ErrorFontCache:
;
}
}
rc = FcConfigAppFontAddDir(priv->config, (const FcChar8 *) dir);
if (!rc) {
ass_msg(library, MSGL_WARN, "%s failed", "FcConfigAppFontAddDir");
}
}
priv->family_default = family ? strdup(family) : NULL;
exit:
priv->path_default = path ? strdup(path) : NULL;
priv->index_default = 0;
return priv;
}
int fontconfig_update(FCInstance *priv)
{
return FcConfigBuildFonts(priv->config);
}
#else /* CONFIG_FONTCONFIG */
char *fontconfig_select(ASS_Library *library, FCInstance *priv,
const char *family, int treat_family_as_pattern,
unsigned bold, unsigned italic, int *index,
uint32_t code)
{
*index = priv->index_default;
return priv->path_default;
}
FCInstance *fontconfig_init(ASS_Library *library,
FT_Library ftlibrary, const char *family,
const char *path, int fc, const char *config,
int update)
{
FCInstance *priv;
ass_msg(library, MSGL_WARN,
"Fontconfig disabled, only default font will be used.");
priv = calloc(1, sizeof(FCInstance));
priv->path_default = strdup(path);
priv->index_default = 0;
return priv;
}
int fontconfig_update(FCInstance *priv)
{
// Do nothing
return 1;
}
#endif
void fontconfig_done(FCInstance *priv)
{
#ifdef CONFIG_FONTCONFIG
if (priv && priv->config)
FcConfigDestroy(priv->config);
#endif
if (priv && priv->path_default)
free(priv->path_default);
if (priv && priv->family_default)
free(priv->family_default);
if (priv)
free(priv);
}
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