obs-studio/plugins/text-freetype2/find-font-unix.c

/*
Copyright (C) 2014 by Leonhard Oelke <leonhard@in-verted.de>

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, see <http://www.gnu.org/licenses/>.
*/
#include <fontconfig/fontconfig.h>

#include <util/base.h>
#include <util/dstr.h>

#include "find-font.h"
#include "text-freetype2.h"

void free_os_font_list(void) {}

bool load_cached_os_font_list(void)
{
	return true;
}

void load_os_font_list(void) {}

const char *get_font_path(const char *family, uint16_t size, const char *style,
			  uint32_t flags, FT_Long *idx)
{
	bool bold = !!(flags & OBS_FONT_BOLD);
	bool italic = !!(flags & OBS_FONT_ITALIC);
	FcPattern *pattern = FcPatternCreate();
	FcPattern *match = NULL;
	bool success = false;
	FcResult match_result;

	/* somewhat of a cheap hack */
	static __thread char result[512];

	FcPatternAddString(pattern, FC_FAMILY, (const FcChar8 *)family);
	FcPatternAddString(pattern, FC_STYLE, (const FcChar8 *)style);
	FcPatternAddInteger(pattern, FC_WEIGHT,
			    bold ? FC_WEIGHT_BOLD : FC_WEIGHT_REGULAR);
	FcPatternAddInteger(pattern, FC_SLANT,
			    italic ? FC_SLANT_ITALIC : FC_SLANT_ROMAN);
	FcPatternAddDouble(pattern, FC_SIZE, (double)size);

	FcConfigSubstitute(NULL, pattern, FcMatchPattern);
	FcDefaultSubstitute(pattern);

	match = FcFontMatch(NULL, pattern, &match_result);
	if (match) {
		FcChar8 *path =
			FcPatternFormat(match, (const FcChar8 *)"%{file}");
		strncpy(result, (char *)path, 511);
		FcStrFree(path);

		int fc_index = 0;
		FcPatternGetInteger(match, FC_INDEX, 1, &fc_index);
		*idx = (FT_Long)fc_index;

		FcPatternDestroy(match);
		success = true;
	} else {
		blog(LOG_WARNING, "no matching font for '%s' found", family);
	}

	FcPatternDestroy(pattern);
	return success ? &result[0] : NULL;
}