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/*
Copyright (C) 2014-2023 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dcpomatic_assert.h"
#include "dcpomatic_log.h"
#include "font.h"
#include "font_config.h"
#include "util.h"
#include <dcp/filesystem.h>
#include <fontconfig/fontconfig.h>
#include <boost/filesystem.hpp>
#include <boost/optional.hpp>
using std::shared_ptr;
using std::string;
using boost::optional;
FontConfig* FontConfig::_instance;
FontConfig::FontConfig()
{
_config = FcInitLoadConfigAndFonts();
FcConfigSetCurrent(_config);
}
FontConfig::~FontConfig()
{
for (auto file: _temp_files) {
boost::system::error_code ec;
dcp::filesystem::remove(file, ec);
}
}
string
FontConfig::make_font_available(shared_ptr<dcpomatic::Font> font)
{
DCPOMATIC_ASSERT(font);
auto existing = _available_fonts.find(font->content());
if (existing != _available_fonts.end()) {
return existing->second;
}
boost::filesystem::path font_file = default_font_file();
if (font->file()) {
font_file = *font->file();
} else if (font->data()) {
/* This font only exists in memory (so far) but FontConfig doesn't have an API to add a font
* from a memory buffer (AFAICS).
* https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/12
* As a workaround, write the font data to a temporary file and use that.
*/
font_file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
_temp_files.push_back(font_file);
font->data()->write(font_file);
}
/* Make this font available to DCP-o-matic */
optional<string> font_name;
FcConfigAppFontAddFile (_config, reinterpret_cast<FcChar8 const *>(font_file.string().c_str()));
auto pattern = FcPatternBuild (
0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *>(0)
);
auto object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
auto font_set = FcFontList (_config, pattern, object_set);
if (font_set) {
for (int i = 0; i < font_set->nfont; ++i) {
FcPattern* font = font_set->fonts[i];
FcChar8* file;
FcChar8* family;
FcChar8* style;
if (
FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
) {
font_name = reinterpret_cast<char const *> (family);
}
}
FcFontSetDestroy (font_set);
}
FcObjectSetDestroy (object_set);
FcPatternDestroy (pattern);
DCPOMATIC_ASSERT(font_name);
/* We need to use the font object as the key, as we may be passed the same shared_ptr to a modified
* Font object in the future and in that case we need to load the new font.
*/
_available_fonts[font->content()] = *font_name;
FcConfigBuildFonts(_config);
return *font_name;
}
optional<boost::filesystem::path>
FontConfig::system_font_with_name(string name)
{
optional<boost::filesystem::path> path;
LOG_GENERAL("Searching system for font {}", name);
auto pattern = FcNameParse(reinterpret_cast<FcChar8 const*>(name.c_str()));
auto object_set = FcObjectSetBuild(FC_FILE, nullptr);
auto font_set = FcFontList(_config, pattern, object_set);
if (font_set) {
LOG_GENERAL("{} candidate fonts found", font_set->nfont);
for (int i = 0; i < font_set->nfont; ++i) {
auto font = font_set->fonts[i];
FcChar8* file;
if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch) {
path = boost::filesystem::path(reinterpret_cast<char*>(file));
LOG_GENERAL("Found {}", path->string());
break;
}
}
FcFontSetDestroy(font_set);
} else {
LOG_GENERAL("No candidate fonts found");
}
FcObjectSetDestroy(object_set);
FcPatternDestroy(pattern);
if (path) {
LOG_GENERAL("Searched system for font {}, found {}", name, path->string());
} else {
LOG_GENERAL("Searched system for font {}; nothing found", name);
}
return path;
}
FontConfig *
FontConfig::instance()
{
if (!_instance) {
_instance = new FontConfig();
}
return _instance;
}
void
FontConfig::drop()
{
delete _instance;
_instance = nullptr;
}
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