d3d11: Implement d3d11_immediate_context_SOSetTargets().

dlls/d3d11/device.c

@@ -645,7 +645,25 @@ static void STDMETHODCALLTYPE d3d11_immediate_context_OMSetDepthStencilState(ID3
 static void STDMETHODCALLTYPE d3d11_immediate_context_SOSetTargets(ID3D11DeviceContext *iface, UINT buffer_count,
         ID3D11Buffer *const *buffers, const UINT *offsets)
 {
-    FIXME("iface %p, buffer_count %u, buffers %p, offsets %p stub!\n", iface, buffer_count, buffers, offsets);
+    struct d3d_device *device = device_from_immediate_ID3D11DeviceContext(iface);
+    unsigned int count, i;
+
+    TRACE("iface %p, buffer_count %u, buffers %p, offsets %p.\n", iface, buffer_count, buffers, offsets);
+
+    count = min(buffer_count, D3D11_SO_BUFFER_SLOT_COUNT);
+    wined3d_mutex_lock();
+    for (i = 0; i < count; ++i)
+    {
+        struct d3d_buffer *buffer = unsafe_impl_from_ID3D11Buffer(buffers[i]);
+
+        wined3d_device_set_stream_output(device->wined3d_device, i,
+                buffer ? buffer->wined3d_buffer : NULL, offsets[i]);
+    }
+    for (; i < D3D11_SO_BUFFER_SLOT_COUNT; ++i)
+    {
+        wined3d_device_set_stream_output(device->wined3d_device, i, NULL, 0);
+    }
+    wined3d_mutex_unlock();
 }
 
 static void STDMETHODCALLTYPE d3d11_immediate_context_DrawAuto(ID3D11DeviceContext *iface)