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OpenVulkano/openVulkanoCpp/Host/Linux/SystemFontResolver.cpp

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C++

/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
#include "Host/SystemFontResolver.hpp"
#include "Base/Logger.hpp"
#include <fontconfig/fontconfig.h>
namespace OpenVulkano
{
std::string SystemFontResolver::GetSystemFontPath(const std::string& fontName)
{
// fontName -> fontPath
static std::map<std::string, std::string> fontFilesMapping = ReadSystemFonts();
auto it = fontFilesMapping.find(fontName);
if (it != fontFilesMapping.end())
{
return it->second;
}
return "";
}
std::map<std::string, std::string> SystemFontResolver::ReadSystemFonts()
{
FcConfig* config = FcInitLoadConfigAndFonts();
FcPattern* pat = FcPatternCreate();
FcObjectSet* os = FcObjectSetBuild(FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, NULL);
FcFontSet* fs = FcFontList(config, pat, os);
if (!fs)
{
Logger::DATA->warn("Could not get system fonts");
FcFontSetDestroy(fs);
FcObjectSetDestroy(os);
FcPatternDestroy(pat);
return {};
}
std::map<std::string, std::string> fontFilesMapping;
for (int i = 0; i < fs->nfont; ++i)
{
FcPattern* font = fs->fonts[i];
FcChar8* file, *style, *family;
if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch &&
FcPatternGetString(font, FC_FAMILY, 0, &family) == FcResultMatch &&
FcPatternGetString(font, FC_STYLE, 0, &style) == FcResultMatch)
{
fontFilesMapping[std::string(reinterpret_cast<char*>(family)) + " " +
std::string(reinterpret_cast<char*>(style))]
= std::string(reinterpret_cast<char*>(file));
}
}
FcFontSetDestroy(fs);
FcObjectSetDestroy(os);
FcPatternDestroy(pat);
FcConfigDestroy(config);
return fontFilesMapping;
}
}