4 files changed, 31 insertions, 2 deletions
diff --git a/src/gallium/state_trackers/wgl/opengl32.def b/src/gallium/state_trackers/wgl/opengl32.def
index 5daa6ddd41..01a29d0391 100644
--- a/src/gallium/state_trackers/wgl/opengl32.def
+++ b/src/gallium/state_trackers/wgl/opengl32.def
@@ -362,7 +362,7 @@ EXPORTS
 	wglShareLists
 	wglSwapBuffers
 	wglSwapLayerBuffers
-;	wglSwapMultipleBuffers
+	wglSwapMultipleBuffers
 	wglUseFontBitmapsA
 	wglUseFontBitmapsW
 	wglUseFontOutlinesA
diff --git a/src/gallium/state_trackers/wgl/opengl32.mingw.def b/src/gallium/state_trackers/wgl/opengl32.mingw.def
index 6ebb31a6f1..0bceee0697 100644
--- a/src/gallium/state_trackers/wgl/opengl32.mingw.def
+++ b/src/gallium/state_trackers/wgl/opengl32.mingw.def
@@ -362,7 +362,7 @@ EXPORTS
 	wglShareLists = wglShareLists@8
 	wglSwapBuffers = wglSwapBuffers@4
 	wglSwapLayerBuffers = wglSwapLayerBuffers@8
-;	wglSwapMultipleBuffers = wglSwapMultipleBuffers@8
+	wglSwapMultipleBuffers = wglSwapMultipleBuffers@8
 	wglUseFontBitmapsA = wglUseFontBitmapsA@16
 	wglUseFontBitmapsW = wglUseFontBitmapsW@16
 	wglUseFontOutlinesA = wglUseFontOutlinesA@32
diff --git a/src/gallium/state_trackers/wgl/stw_wgl.c b/src/gallium/state_trackers/wgl/stw_wgl.c
index bb199fdd25..5fbb7bf7cf 100644
--- a/src/gallium/state_trackers/wgl/stw_wgl.c
+++ b/src/gallium/state_trackers/wgl/stw_wgl.c
@@ -97,6 +97,19 @@ wglSwapBuffers(
 }
 
 
+WINGDIAPI DWORD WINAPI
+wglSwapMultipleBuffers(UINT n,
+                       CONST WGLSWAP *ps)
+{
+   UINT i;
+
+   for (i =0; i < n; ++i)
+      wglSwapBuffers(ps->hdc);
+
+   return 0;
+}
+
+
 WINGDIAPI BOOL APIENTRY
 wglSwapLayerBuffers(
    HDC hdc,
diff --git a/src/gallium/state_trackers/wgl/stw_wgl.h b/src/gallium/state_trackers/wgl/stw_wgl.h
index a98179944a..57baaf0a11 100644
--- a/src/gallium/state_trackers/wgl/stw_wgl.h
+++ b/src/gallium/state_trackers/wgl/stw_wgl.h
@@ -59,5 +59,21 @@ wglSetPixelFormat(HDC hdc,
                   int iPixelFormat,
                   CONST PIXELFORMATDESCRIPTOR *ppfd);
 
+#if defined(__MINGW32__) || (WINVER < 0x0500)
+
+typedef struct _WGLSWAP
+{
+   HDC hdc;
+   UINT uiFlags;
+} WGLSWAP;
+
+#define WGL_SWAPMULTIPLE_MAX 16
+
+WINGDIAPI DWORD WINAPI
+wglSwapMultipleBuffers(UINT n,
+                       CONST WGLSWAP *ps);
+
+#endif
+
 
 #endif /* STW_WGL_H_ */