mpv/libass/ass_fontconfig.c

450 lines
12 KiB
C

// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, 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 "mputils.h"
#include "ass.h"
#include "ass_library.h"
#include "ass_fontconfig.h"
#ifdef HAVE_FONTCONFIG
#include <fontconfig/fontconfig.h>
#include <fontconfig/fcfreetype.h>
#endif
struct fc_instance_s {
#ifdef HAVE_FONTCONFIG
FcConfig* config;
#endif
char* family_default;
char* path_default;
int index_default;
};
#ifdef HAVE_FONTCONFIG
/**
* \brief Low-level font selection.
* \param priv private data
* \param family font family
* \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(fc_instance_t* priv, const char* family, unsigned bold, unsigned italic, int* index,
uint32_t code)
{
FcBool rc;
FcResult result;
FcPattern *pat = 0, *rpat;
int val_i;
FcChar8* val_s;
FcBool val_b;
FcCharSet* val_cs;
FcFontSet* fset = 0;
int curf;
char* retval = 0;
*index = 0;
pat = FcPatternCreate();
if (!pat)
goto error;
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.
if (strchr(family, ' ')) {
char *p, *s = strdup(family);
while (p = strrchr(s, ' ')) {
*p = '\0';
FcPatternAddString(pat, FC_FAMILY, (const FcChar8*)s);
}
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);
for (curf = 0; curf < fset->nfont; ++curf) {
rpat = fset->fonts[curf];
result = FcPatternGetBool(rpat, FC_OUTLINE, 0, &val_b);
if (result != FcResultMatch)
continue;
if (val_b != FcTrue)
continue;
if (!code)
break;
result = FcPatternGetCharSet(rpat, FC_CHARSET, 0, &val_cs);
if (result != FcResultMatch)
continue;
if (FcCharSetHasChar(val_cs, code))
break;
}
if (curf >= fset->nfont)
goto error;
rpat = fset->fonts[curf];
result = FcPatternGetInteger(rpat, FC_INDEX, 0, &val_i);
if (result != FcResultMatch)
goto error;
*index = val_i;
result = FcPatternGetString(rpat, FC_FAMILY, 0, &val_s);
if (result != FcResultMatch)
goto error;
if (strcasecmp((const char*)val_s, family) != 0) {
result = FcPatternGetString(rpat, FC_FULLNAME, 0, &val_s);
if (result != FcResultMatch || strcasecmp((const char*)val_s, family) != 0)
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_SelectedFontFamilyIsNotTheRequestedOne,
(const char*)val_s, family);
}
result = FcPatternGetString(rpat, FC_FILE, 0, &val_s);
if (result != FcResultMatch)
goto error;
retval = strdup((const char*)val_s);
error:
if (pat) FcPatternDestroy(pat);
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 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(fc_instance_t* priv, const char* family, 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(priv, family, bold, italic, index, code);
if (!res && priv->family_default) {
res = _select_font(priv, priv->family_default, bold, italic, index, code);
if (res)
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_UsingDefaultFontFamily,
family, bold, italic, res, *index);
}
if (!res && priv->path_default) {
res = priv->path_default;
*index = priv->index_default;
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_UsingDefaultFont,
family, bold, italic, res, *index);
}
if (!res) {
res = _select_font(priv, "Arial", bold, italic, index, code);
if (res)
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_UsingArialFontFamily,
family, bold, italic, res, *index);
}
if (res)
mp_msg(MSGT_ASS, MSGL_V, "fontconfig_select: (%s, %d, %d) -> %s, %d\n",
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 = 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(fc_instance_t* priv, ass_library_t* 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 = 0;
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) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FailedToCreateDirectory, fonts_dir);
}
} else if (!S_ISDIR(st.st_mode)) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NotADirectory, 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;
rc = FT_New_Memory_Face(ftlibrary, (unsigned char*)data, data_size, 0, &face);
if (rc) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningMemoryFont, name);
return;
}
pattern = FcFreeTypeQueryFace(face, (unsigned char*)name, 0, FcConfigGetBlanks(priv->config));
if (!pattern) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FunctionCallFailed, "FcFreeTypeQueryFace");
FT_Done_Face(face);
return;
}
fset = FcConfigGetFonts(priv->config, FcSetSystem); // somehow it failes when asked for FcSetApplication
if (!fset) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FunctionCallFailed, "FcConfigGetFonts");
FT_Done_Face(face);
return;
}
res = FcFontSetAdd(fset, pattern);
if (!res) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FunctionCallFailed, "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
* \return pointer to fontconfig private data
*/
fc_instance_t* fontconfig_init(ass_library_t* library, FT_Library ftlibrary, const char* family, const char* path, int fc)
{
int rc;
fc_instance_t* priv = calloc(1, sizeof(fc_instance_t));
const char* dir = library->fonts_dir;
int i;
if (!fc) {
mp_msg(MSGT_ASS, MSGL_WARN,
MSGTR_LIBASS_FontconfigDisabledDefaultFontWillBeUsed);
priv->config = NULL;
priv->path_default = strdup(path);
priv->index_default = 0;
return priv;
}
rc = FcInit();
assert(rc);
priv->config = FcConfigGetCurrent();
if (!priv->config) {
mp_msg(MSGT_ASS, MSGL_FATAL, MSGTR_LIBASS_FcInitLoadConfigAndFontsFailed);
return 0;
}
for (i = 0; i < library->num_fontdata; ++i)
process_fontdata(priv, library, ftlibrary, i);
if (FcDirCacheValid((const FcChar8 *)dir) == FcFalse)
{
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_UpdatingFontCache);
if (FcGetVersion() >= 20390 && FcGetVersion() < 20400)
mp_msg(MSGT_ASS, MSGL_WARN,
MSGTR_LIBASS_BetaVersionsOfFontconfigAreNotSupported);
// 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) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FcStrSetAddFailed);
goto ErrorFontCache;
}
rc = FcDirScan(fcs, fss, NULL, FcConfigGetBlanks(priv->config), (const FcChar8 *)dir, FcFalse);
if (!rc) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FcDirScanFailed);
goto ErrorFontCache;
}
rc = FcDirSave(fcs, fss, (const FcChar8 *)dir);
if (!rc) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FcDirSave);
goto ErrorFontCache;
}
ErrorFontCache:
;
}
}
rc = FcConfigAppFontAddDir(priv->config, (const FcChar8*)dir);
if (!rc) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FcConfigAppFontAddDirFailed);
}
priv->family_default = family ? strdup(family) : 0;
priv->path_default = path ? strdup(path) : 0;
priv->index_default = 0;
return priv;
}
#else // HAVE_FONTCONFIG
char* fontconfig_select(fc_instance_t* priv, const char* family, unsigned bold, unsigned italic, int* index,
uint32_t code)
{
*index = priv->index_default;
return priv->path_default;
}
fc_instance_t* fontconfig_init(ass_library_t* library, FT_Library ftlibrary, const char* family, const char* path)
{
fc_instance_t* priv;
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FontconfigDisabledDefaultFontWillBeUsed);
priv = calloc(1, sizeof(fc_instance_t));
priv->path_default = strdup(path);
priv->index_default = 0;
return priv;
}
#endif
void fontconfig_done(fc_instance_t* priv)
{
// don't call FcFini() here, library can still be used by some code
if (priv && priv->path_default) free(priv->path_default);
if (priv && priv->family_default) free(priv->family_default);
if (priv) free(priv);
}