Add hotkey for "force gamma correction" setting.

Fixed #2318 Request: Keyboard shortcut to enable Custom Gamma Correction Levels

src/Config.cpp

@@ -184,6 +184,8 @@ const char* Config::hotkeyIniName(u32 _idx)
 		return "hkOsdInternalResolution";
 	case Config::HotKey::hkOsdRenderingResolution:
 		return "hkOsdRenderingResolution";
+	case Config::HotKey::hkForceGammaCorrection:
+		return "hkForceGammaCorrection";
 	}
 	return nullptr;
 }

src/Config.h

@@ -225,6 +225,7 @@ struct Config
 		hkOsdPercent,
 		hkOsdInternalResolution,
 		hkOsdRenderingResolution,
+		hkForceGammaCorrection,
 		hkTotal
 	};
 

src/GLideNUI/ConfigDialog.cpp

@@ -95,6 +95,8 @@ QString ConfigDialog::_hotkeyDescription(quint32 _idx) const
 		return tr("Toggle OSD internal resolution");
 	case Config::HotKey::hkOsdRenderingResolution:
 		return tr("Toggle OSD rendering resolution");
+	case Config::HotKey::hkForceGammaCorrection:
+		return tr("Toggle force gamma correction");
 	}
 	return tr("Unknown hotkey");
 }

src/VI.cpp

@@ -187,6 +187,14 @@ static void checkHotkeys()
 	if (osal_is_key_pressed(config.hotkeys.keys[Config::hkOsdRenderingResolution], 0x0001)) {
 		config.onScreenDisplay.renderingResolution = !config.onScreenDisplay.renderingResolution;
 	}
+
+	if (osal_is_key_pressed(config.hotkeys.keys[Config::hkForceGammaCorrection], 0x0001)) {
+		if (config.gammaCorrection.force == 0)
+			dwnd().getDrawer().showMessage("Force gamma correction on\n", Milliseconds(750));
+		else
+			dwnd().getDrawer().showMessage("Force gamma correction off\n", Milliseconds(750));
+		config.gammaCorrection.force = !config.gammaCorrection.force;
+	}
 }
 
 void VI_UpdateScreen()

src/mupenplus/Config_mupenplus.cpp

@@ -45,6 +45,8 @@ const char* _hotkeyDescription(u32 _idx)
 		return "Hotkey: toggle OSD internal resolution";
 	case Config::HotKey::hkOsdRenderingResolution:
 		return "Hotkey: toggle OSD rendering resolution";
+	case Config::HotKey::hkForceGammaCorrection:
+		return "Hotkey: toggle force gamma correction";
 	}
 	return "Unknown hotkey";
 }