Add configurable logging backends

src/yuzu/debugger/console.cpp

@@ -0,0 +1,45 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#ifdef _WIN32
+#include <windows.h>
+
+#include <wincon.h>
+#endif
+
+#include "common/logging/backend.h"
+#include "yuzu/debugger/console.h"
+#include "yuzu/ui_settings.h"
+
+namespace Debugger {
+void ToggleConsole() {
+#if defined(_WIN32) && !defined(_DEBUG)
+    FILE* temp;
+    if (UISettings::values.show_console) {
+        if (AllocConsole()) {
+            // The first parameter for freopen_s is a out parameter, so we can just ignore it
+            freopen_s(&temp, "CONIN$", "r", stdin);
+            freopen_s(&temp, "CONOUT$", "w", stdout);
+            freopen_s(&temp, "CONOUT$", "w", stderr);
+            Log::AddBackend(std::make_unique<Log::ColorConsoleBackend>());
+        }
+    } else {
+        if (FreeConsole()) {
+            // In order to close the console, we have to also detach the streams on it.
+            // Just redirect them to NUL if there is no console window
+            Log::RemoveBackend(Log::ColorConsoleBackend::Name());
+            freopen_s(&temp, "NUL", "r", stdin);
+            freopen_s(&temp, "NUL", "w", stdout);
+            freopen_s(&temp, "NUL", "w", stderr);
+        }
+    }
+#else
+    if (UISettings::values.show_console) {
+        Log::AddBackend(std::make_unique<Log::ColorConsoleBackend>());
+    } else {
+        Log::RemoveBackend(Log::ColorConsoleBackend::Name());
+    }
+#endif
+}
+} // namespace Debugger

src/yuzu/debugger/console.h

@@ -0,0 +1,14 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Debugger {
+
+/**
+ * Uses the WINAPI to hide or show the stderr console. This function is a placeholder until we can
+ * get a real qt logging window which would work for all platforms.
+ */
+void ToggleConsole();
+} // namespace Debugger