From 9050febf06d2dc2d031a316a0e0f5a7ba83da8bb Mon Sep 17 00:00:00 2001
From: Lionheart Zhang <flying19880517@live.cn>
Date: Sat, 24 Dec 2016 03:08:22 +0800
Subject: [PATCH] UI: Convert to wide before outputting debug text (win)

Fixes an issue where non-english debug text wouldn't display correctly
in the debugger output on windows.  Also, only output debug text when
actually debugging.

Closes jp9000/obs-studio#734
---
 UI/obs-app.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/UI/obs-app.cpp b/UI/obs-app.cpp
index 8fd6f0bbc..607b86a17 100644
--- a/UI/obs-app.cpp
+++ b/UI/obs-app.cpp
@@ -20,6 +20,7 @@
 #include <wchar.h>
 #include <chrono>
 #include <ratio>
+#include <string>
 #include <sstream>
 #include <mutex>
 #include <util/bmem.h>
@@ -316,8 +317,19 @@ static void do_log(int log_level, const char *msg, va_list args, void *param)
 	vsnprintf(str, 4095, msg, args);
 
 #ifdef _WIN32
-	OutputDebugStringA(str);
-	OutputDebugStringA("\n");
+	if (IsDebuggerPresent()) {
+		static wstring wide_buf;
+		int wNum = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
+		if (wNum > 1) {
+			wide_buf.reserve(wNum + 1);
+			wide_buf.resize(wNum - 1);
+			MultiByteToWideChar(CP_UTF8, 0, str, -1, &wide_buf[0],
+					wNum);
+			wide_buf.push_back('\n');
+
+			OutputDebugStringW(wide_buf.c_str());
+		}
+	}
 #else
 	def_log_handler(log_level, msg, args2, nullptr);
 #endif