feat(gx): detach CGxDeviceGLSDL from GxApi_OpenGl handling

src/gx/CGxDevice.cpp

@@ -123,14 +123,17 @@ CGxDevice* CGxDevice::NewGLL() {
 }
 #endif
 
+CGxDevice* CGxDevice::NewOpenGl() {
+    return nullptr;
+}
 
 #if defined(WHOA_SYSTEM_WIN) || defined(WHOA_SYSTEM_LINUX)
-CGxDevice* CGxDevice::NewOpenGl() {
+CGxDevice* CGxDevice::NewGLSDL() {
     auto m = SMemAlloc(sizeof(CGxDeviceGLSDL), __FILE__, __LINE__, 0x0);
     return new (m) CGxDeviceGLSDL();
 }
 #else
-CGxDevice* CGxDevice::NewOpenGl() {
+CGxDevice* CGxDevice::NewGLSDL() {
     return nullptr;
 }
 #endif

src/gx/CGxDevice.hpp

@@ -56,6 +56,9 @@ class CGxDevice {
 #endif
 #if defined(WHOA_SYSTEM_MAC)
         static CGxDevice* NewGLL();
+#endif
+#if defined(WHOA_SYSTEM_LINUX) || defined(WHOA_SYSTEM_WIN)
+        static CGxDevice* NewGLSDL();
 #endif
         static CGxDevice* NewOpenGl();
         static uint32_t PrimCalcCount(EGxPrim primType, uint32_t count);