wined3d: Implemented fallback for separate stencil function in WINED3DRS_CCW_STENCILFUNC

[Vitaly Budovski]

wined3d: Implemented fallback for separate stencil function in 
WINED3DRS_CCW_STENCILFUNC

---

 dlls/wined3d/device.c |   21 ++++++++++++++++++---
 1 files changed, 18 insertions(+), 3 deletions(-)

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982202c6ab7ec6ca45a4273ec61c66b04b1c9f60
diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 0bc30f4..124b8bf 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -3816,9 +3816,24 @@ HRESULT WINAPI IWineD3DDeviceImpl_SetRen
         if(!This->stateBlock->renderState[WINED3DRS_TWOSIDEDSTENCILMODE]) {
             if(GL_EXTCALL(glStencilFuncSeparate)) {
                 GL_EXTCALL(glStencilFuncSeparate(GL_BACK, func, ref, mask));
-                checkGLcall("glStencilOpSeparate(GL_BACK,...)");
-            } else
-                WARN("Unsupported in local OpenGL implementation: glStencilFuncSeparate\n");
+                checkGLcall("glStencilFuncSeparate(GL_BACK,...)");
+            }
+            else if(GL_EXTCALL(glActiveStencilFaceEXT)) {
+                glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT);
+                checkGLcall("glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT)");
+                GL_EXTCALL(glActiveStencilFaceEXT(GL_BACK));
+                checkGLcall("glActiveStencilFaceEXT(GL_BACK)");
+                glStencilFunc(func, ref, mask);
+                checkGLcall("glStencilFunc(...)");
+            }
+            else if(GL_EXTCALL(glStencilFuncSeparateATI)) {
+                GL_EXTCALL(glStencilFuncSeparateATI(GL_BACK, func, ref, mask));
+                checkGLcall("glStencilFuncSeparateATI(GL_BACK,...)");
+            } else {
+                TRACE("Separate stencil function not supported on this version of opengl");
+                glStencilFunc(func, ref, mask);
+                checkGLcall("glStencilFunc(...)");
+            }
         } else {
             glStencilFunc(func, ref, mask);
             checkGLcall("glStencilFunc(...)");
-- 
1.0.4