From 205673715cf03fc11d72c668d974178aecd01a17 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Wed, 14 Apr 2021 20:49:26 +0100
Subject: [PATCH] MinGW32: Fix EnumDisplayMonitors callback calling convention
 compile error

---
 src/video/win32_v.cpp | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
index ee2a18e3d9..5711d9d6b9 100644
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -918,24 +918,27 @@ void VideoDriver_Win32Base::EditBoxLostFocus()
 	SetCandidatePos(this->main_wnd);
 }
 
+BOOL CALLBACK EnumDisplayMonitorsCallback(HMONITOR hMonitor, HDC hDC, LPRECT rc, LPARAM data)
+{
+	auto &list = *reinterpret_cast<std::vector<int>*>(data);
+
+	MONITORINFOEX monitorInfo = {};
+	monitorInfo.cbSize = sizeof(MONITORINFOEX);
+	GetMonitorInfo(hMonitor, &monitorInfo);
+
+	DEVMODE devMode = {};
+	devMode.dmSize = sizeof(DEVMODE);
+	devMode.dmDriverExtra = 0;
+	EnumDisplaySettings(monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, &devMode);
+
+	if (devMode.dmDisplayFrequency != 0) list.push_back(devMode.dmDisplayFrequency);
+	return true;
+}
+
 std::vector<int> VideoDriver_Win32Base::GetListOfMonitorRefreshRates()
 {
 	std::vector<int> rates = {};
-	EnumDisplayMonitors(nullptr, nullptr, [](HMONITOR hMonitor, HDC hDC, LPRECT rc, LPARAM data) -> BOOL {
-		auto &list = *reinterpret_cast<std::vector<int>*>(data);
-
-		MONITORINFOEX monitorInfo = {};
-		monitorInfo.cbSize = sizeof(MONITORINFOEX);
-		GetMonitorInfo(hMonitor, &monitorInfo);
-
-		DEVMODE devMode = {};
-		devMode.dmSize = sizeof(DEVMODE);
-		devMode.dmDriverExtra = 0;
-		EnumDisplaySettings(monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, &devMode);
-
-		if (devMode.dmDisplayFrequency != 0) list.push_back(devMode.dmDisplayFrequency);
-		return true;
-	}, reinterpret_cast<LPARAM>(&rates));
+	EnumDisplayMonitors(nullptr, nullptr, (MONITORENUMPROC)&EnumDisplayMonitorsCallback, reinterpret_cast<LPARAM>(&rates));
 	return rates;
 }