62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include "Host/SystemFontResolver.hpp"
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#include "Base/Utils.hpp"
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#include <Windows.h>
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#include <filesystem>
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#define QFR_DESCRIPTION 1
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namespace OpenVulkano
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{
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const std::string& SystemFontResolver::GetSystemFontPath(const std::string& fontName)
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{
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// font name -> filename
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static std::map<std::string, std::string> fontFileMapping = ReadSystemFonts();
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static std::string fallbackString;
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auto it = fontFileMapping.find(Utils::ToLower(fontName));
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return it == fontFileMapping.end() ? fallbackString : it->second;
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}
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std::map<std::string, std::string> SystemFontResolver::ReadSystemFonts()
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{
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std::map<std::string, std::string> fontFileMapping;
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// thank you Microsoft for function that is not even documented, but exists and it's the only function that
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// can return real font name from font filename (e.g. font filename is times.ttf that corresponds to Times New Roman)
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int(WINAPI* GetFontResourceInfoW)(wchar_t*, unsigned long*, void*, unsigned long);
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*(FARPROC*) &GetFontResourceInfoW = GetProcAddress(GetModuleHandleA("gdi32"), "GetFontResourceInfoW");
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std::wstring winDir;
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winDir.resize(MAX_PATH);
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UINT len = GetWindowsDirectoryW(winDir.data(), MAX_PATH);
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winDir.resize(len);
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std::filesystem::path fontsDir = std::filesystem::path(winDir) / "Fonts";
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for (const auto& fontFilename : std::filesystem::directory_iterator(fontsDir))
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{
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unsigned long size = 0;
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std::wstring ws = fontFilename.path().wstring();
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if (!GetFontResourceInfoW(ws.data(), &size, NULL, QFR_DESCRIPTION))
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{
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continue;
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}
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std::wstring fontName;
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fontName.resize(size);
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if (GetFontResourceInfoW(ws.data(), &size, fontName.data(), QFR_DESCRIPTION))
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{
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// remove null-terminated characters since size is always bigger than needed
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std::string fontNameCropped(fontName.begin(), fontName.end());
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size_t realSize = strlen(fontNameCropped.data());
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fontNameCropped.resize(realSize);
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Utils::ToLower(fontNameCropped);
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fontFileMapping[std::move(fontNameCropped)] = fontFilename.path().string();
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}
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}
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return fontFileMapping;
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}
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}
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