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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "mp_msg.h"
#include "ass_fontconfig.h"
#ifdef HAVE_FONTCONFIG
#include <fontconfig/fontconfig.h>
#endif
struct fc_instance_s {
#ifdef HAVE_FONTCONFIG
FcConfig* config;
#endif
char* family_default;
char* path_default;
int index_default;
};
extern int no_more_font_messages;
#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
* \return font file path
*/
static char* _select_font(fc_instance_t* priv, const char* family, unsigned bold, unsigned italic, int* index)
{
FcBool rc;
FcResult result;
FcPattern *pat, *rpat;
int val_i;
FcChar8* val_s;
FcBool val_b;
char buf[2000];
*index = 0;
snprintf(buf, 2000, "%s:outline=True:slant=%u:weight=%u", family, italic, bold);
pat = FcNameParse((const FcChar8*)buf);
if (!pat)
return 0;
FcDefaultSubstitute(pat);
rc = FcConfigSubstitute(priv->config, pat, FcMatchPattern);
if (!rc)
return 0;
rpat = FcFontMatch(priv->config, pat, &result);
if (!rpat)
return 0;
result = FcPatternGetBool(rpat, FC_OUTLINE, 0, &val_b);
if (result != FcResultMatch)
return 0;
if (val_b != 1)
return 0;
result = FcPatternGetInteger(rpat, FC_INDEX, 0, &val_i);
if (result != FcResultMatch)
return 0;
*index = val_i;
result = FcPatternGetString(rpat, FC_FAMILY, 0, &val_s);
if (result != FcResultMatch)
return 0;
if (strcasecmp((const char*)val_s, family) != 0)
mp_msg(MSGT_GLOBAL, MSGL_WARN, "fontconfig: selected font family is not the requested one: '%s' != '%s'\n",
(const char*)val_s, family);
result = FcPatternGetString(rpat, FC_FILE, 0, &val_s);
if (result != FcResultMatch)
return 0;
return strdup((const char*)val_s);
}
/**
* \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
* \return font file path
*/
char* fontconfig_select(fc_instance_t* priv, const char* family, unsigned bold, unsigned italic, int* index)
{
char* res = 0;
if (family && *family)
res = _select_font(priv, family, bold, italic, index);
if (!res && priv->family_default) {
res = _select_font(priv, priv->family_default, bold, italic, index);
if (res && !no_more_font_messages)
mp_msg(MSGT_GLOBAL, MSGL_WARN, "fontconfig_select: using default font family: (%s, %d, %d) -> %s, %d\n",
family, bold, italic, res, *index);
}
if (!res && priv->path_default) {
res = priv->path_default;
*index = priv->index_default;
if (!no_more_font_messages)
mp_msg(MSGT_GLOBAL, MSGL_WARN, "fontconfig_select: using default font: (%s, %d, %d) -> %s, %d\n",
family, bold, italic, res, *index);
}
if (!res) {
res = _select_font(priv, "Arial", bold, italic, index);
if (res && !no_more_font_messages)
mp_msg(MSGT_GLOBAL, MSGL_WARN, "fontconfig_select: using 'Arial' font family: (%s, %d, %d) -> %s, %d\n",
family, bold, italic, res, *index);
}
if (res)
mp_msg(MSGT_GLOBAL, MSGL_V, "fontconfig_select: (%s, %d, %d) -> %s, %d\n",
family, bold, italic, res, *index);
return res;
}
/**
* \brief Init fontconfig.
* \param dir additional directoryu for fonts
* \param family default font family
* \param path default font path
* \return pointer to fontconfig private data
*/
fc_instance_t* fontconfig_init(const char* dir, const char* family, const char* path)
{
int rc;
struct stat st;
fc_instance_t* priv = calloc(1, sizeof(fc_instance_t));
rc = FcInit();
assert(rc);
priv->config = FcConfigGetCurrent();
if (!priv->config) {
mp_msg(MSGT_GLOBAL, MSGL_FATAL, "FcInitLoadConfigAndFonts failed\n");
return 0;
}
rc = FcConfigAppFontAddDir(priv->config, (const FcChar8*)dir);
if (!rc) {
mp_msg(MSGT_GLOBAL, MSGL_WARN, "FcConfigAppFontAddDir failed\n");
}
priv->family_default = family ? strdup(family) : 0;
priv->index_default = 0;
rc = stat(path, &st);
if (!rc && S_ISREG(st.st_mode))
priv->path_default = path ? strdup(path) : 0;
else
priv->path_default = 0;
return priv;
}
#else
char* fontconfig_select(fc_instance_t* priv, const char* family, unsigned bold, unsigned italic, int* index)
{
*index = priv->index_default;
return priv->path_default;
}
fc_instance_t* fontconfig_init(const char* dir, const char* family, const char* path)
{
mp_msg(MSGT_GLOBAL, MSGL_WARN, "Fontconfig disabled, only default font will be used\n");
fc_instance_t* 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);
}
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