xrEngine: Add OpenGL support.

Author: CrossVR

src/xrEngine/EngineAPI.cpp

@@ -55,10 +55,24 @@ bool is_enough_address_space_available()
 
 void CEngineAPI::InitializeNotDedicated()
 {
+    LPCSTR gl_name = "xrRender_GL";
     LPCSTR r2_name = "xrRender_R2";
     LPCSTR r3_name = "xrRender_R3";
     LPCSTR r4_name = "xrRender_R4";
 
+    if (psDeviceFlags.test(rsGL))
+    {
+        // try to initialize GL
+        Log("Loading DLL:", gl_name);
+        hRender = LoadLibrary(gl_name);
+        if (0 == hRender)
+        {
+            // try to load R1
+            Msg("! ...Failed - incompatible hardware.");
+            psDeviceFlags.set(rsR2, TRUE);
+        }
+    }
+
     if (psDeviceFlags.test(rsR4))
     {
         // try to initialize R4
@@ -192,17 +206,20 @@ void CEngineAPI::CreateRendererList()
 #else
     // TODO: ask renderers if they are supported!
     if (vid_quality_token != NULL) return;
+    bool bSupports_gl = false;
     bool bSupports_r2 = false;
     bool bSupports_r2_5 = false;
     bool bSupports_r3 = false;
     bool bSupports_r4 = false;
 
+    LPCSTR gl_name = "xrRender_GL";
     LPCSTR r2_name = "xrRender_R2";
     LPCSTR r3_name = "xrRender_R3";
     LPCSTR r4_name = "xrRender_R4";
 
     if (strstr(Core.Params, "-perfhud_hack"))
     {
+        bSupports_gl = true;
         bSupports_r2 = true;
         bSupports_r2_5 = true;
         bSupports_r3 = true;
@@ -251,6 +268,15 @@ void CEngineAPI::CreateRendererList()
             bSupports_r4 = test_dx11_rendering();
             FreeLibrary(hRender);
         }
+
+        // try to initialize GL
+        Log("Loading DLL:", gl_name);
+        hRender = LoadLibrary(gl_name);
+        if (hRender)
+        {
+            bSupports_gl = true;
+            FreeLibrary(hRender);
+        }
     }
 
     hRender = 0;
@@ -310,6 +336,10 @@ void CEngineAPI::CreateRendererList()
         if (bBreakLoop) break;
         _tmp.back() = xr_strdup(val);
     }
+
+    if (bSupports_gl)
+        _tmp.push_back("renderer_gl");
+
     u32 _cnt = _tmp.size() + 1;
     vid_quality_token = xr_alloc<xr_token>(_cnt);
 

src/xrEngine/defines.h

@@ -37,7 +37,8 @@ enum
     rsR2 = (1ul << 19ul),
     rsR3 = (1ul << 20ul),
     rsR4 = (1ul << 21ul),
-    // 22-32 bit - reserved to Editor
+    rsGL = (1ul << 22ul),
+    // 23-32 bit - reserved to Editor
 };
 
 

src/xrEngine/x_ray.cpp

@@ -791,7 +791,15 @@ int APIENTRY WinMain_impl(HINSTANCE hInstance,
             return 0;
         }        
 #ifndef DEDICATED_SERVER
-        if (strstr(Core.Params, "-r2a"))
+        if (strstr(Core.Params, "-gl"))
+            Console->Execute("renderer renderer_gl");
+        else if (strstr(Core.Params, "-r4"))
+            Console->Execute("renderer renderer_r4");
+        else if (strstr(Core.Params, "-r3"))
+            Console->Execute("renderer renderer_r3");
+        else if (strstr(Core.Params, "-r2.5"))
+            Console->Execute("renderer renderer_r2.5");
+        else if (strstr(Core.Params, "-r2a"))
             Console->Execute("renderer renderer_r2a");
         else if (strstr(Core.Params, "-r2"))
             Console->Execute("renderer renderer_r2");