emoji_dxlib.cpp

#include <DxLib.h>
#include <string>
#include <codecvt>
#include <vector>
#include <fstream>
int WINAPI WinMain(HINSTANCE /*hInstance*/, HINSTANCE /*hPrevInstance*/, LPSTR /*lpCmdLine*/, int /*nCmdShow*/) {
	//init
	DxLib::SetOutApplicationLogValidFlag(FALSE);
	DxLib::SetGraphMode(300, 100, 16);
	DxLib::ChangeWindowMode(TRUE);
	DxLib::SetBackgroundColor(255, 255, 255);
	if (DxLib_Init() == -1)return -1;// エラーが起きたら直ちに終了
	DxLib::SetDrawScreen(DX_SCREEN_BACK);
	DxLib::ClearDrawScreen();
	const auto font = DxLib::CreateFontToHandle(L"Segoe UI Symbol", 40, 1);

	//print
	using namespace std::literals;
	const auto str = U"1⃣🇫🇷㊙𠮷🆔🐑"s;
	const auto str_u16 = L"1⃣🇫🇷㊙𠮷🆔🐑"s;
	DxLib::DrawStringToHandle(0, 0, str_u16.c_str(), DxLib::GetColor(0, 0, 0), font);
	DxLib::ScreenFlip();

	//get info
	std::vector<DRAWCHARINFO> info;
	info.resize(str.size());
	DxLib::GetDrawStringCharInfoToHandle(&info[0], str_u16.c_str(), str_u16.size(), font);

	//write BOM
	std::ofstream o;
	o.exceptions(std::ios::badbit | std::ios::failbit);
	o.open("log.txt");
	const char bom[] = { (char)0xef, (char)0xbb, (char)0xbf , '\0' };
	o << bom << std::flush;
	o.close();
	//write info
	std::wofstream out;
	out.exceptions(std::ios::badbit | std::ios::failbit);
	out.open("log.txt", std::ios_base::app);
	out.imbue(std::locale(std::locale(""), new std::codecvt_utf8_utf16<wchar_t>()));
	using std::endl;
	for (auto&& i : info) {
		out
			<< L"char:" << i.Char << endl
			<< L"byte:" << i.Bytes << endl
			<< L"size: (" << i.SizeX << ", " << i.SizeY << L')' << endl
			<< L"draw_size: (" << i.DrawX << ", " << i.DrawY << L')' << endl;
	}
	DxLib::WaitKey();
	DxLib::WaitKey();
	return 0;
}

log.txt

char:1
byte:2
size: (22, 56)
draw_size: (0, -7)
char:⃣
byte:2
size: (0, 56)
draw_size: (22, -7)
char:🇫
byte:4
size: (17, 56)
draw_size: (22, -7)
char:🇷
byte:4
size: (19, 56)
draw_size: (39, -7)
char:㊙
byte:2
size: (41, 56)
draw_size: (58, -7)
char:𠮷
byte:4
size: (0, 56)
draw_size: (99, -7)
char:🆔
byte:4
size: (40, 56)
draw_size: (99, -7)
char:🐑
byte:4
size: (41, 56)
draw_size: (139, -7)

result.png