[PATCH 4/5] wined3d: Getting the current vertex shader should never fail.

[Henri Verbeet]

---
 dlls/d3d8/device.c       |    5 ++---
 dlls/d3d9/device.c       |   22 +++++++---------------
 dlls/wined3d/device.c    |   20 ++++++++++----------
 include/wine/wined3d.idl |    3 +--
 4 files changed, 20 insertions(+), 30 deletions(-)

diff --git a/dlls/d3d8/device.c b/dlls/d3d8/device.c
index 59e318c..d1edac4 100644
--- a/dlls/d3d8/device.c
+++ b/dlls/d3d8/device.c
@@ -1960,7 +1960,7 @@ static HRESULT WINAPI IDirect3DDevice8Impl_GetVertexShader(IDirect3DDevice8 *ifa
 static HRESULT  WINAPI  IDirect3DDevice8Impl_DeleteVertexShader(LPDIRECT3DDEVICE8 iface, DWORD pShader) {
     IDirect3DDevice8Impl *This = (IDirect3DDevice8Impl *)iface;
     IDirect3DVertexShader8Impl *shader;
-    IWineD3DVertexShader *cur = NULL;
+    IWineD3DVertexShader *cur;
 
     TRACE("iface %p, shader %#x.\n", iface, pShader);
 
@@ -1974,8 +1974,7 @@ static HRESULT  WINAPI  IDirect3DDevice8Impl_DeleteVertexShader(LPDIRECT3DDEVICE
         return D3DERR_INVALIDCALL;
     }
 
-    IWineD3DDevice_GetVertexShader(This->WineD3DDevice, &cur);
-
+    cur = IWineD3DDevice_GetVertexShader(This->WineD3DDevice);
     if (cur)
     {
         if (cur == shader->wineD3DVertexShader) IDirect3DDevice8_SetVertexShader(iface, 0);
diff --git a/dlls/d3d9/device.c b/dlls/d3d9/device.c
index 7c10c43..5b03a9f 100644
--- a/dlls/d3d9/device.c
+++ b/dlls/d3d9/device.c
@@ -2219,34 +2219,26 @@ static HRESULT WINAPI IDirect3DDevice9Impl_GetVertexShader(IDirect3DDevice9Ex *i
         IDirect3DVertexShader9 **shader)
 {
     IWineD3DVertexShader *wined3d_shader;
-    HRESULT hr;
 
     TRACE("iface %p, shader %p.\n", iface, shader);
 
     wined3d_mutex_lock();
-    hr = IWineD3DDevice_GetVertexShader(((IDirect3DDevice9Impl *)iface)->WineD3DDevice, &wined3d_shader);
-    if (SUCCEEDED(hr))
+    wined3d_shader = IWineD3DDevice_GetVertexShader(((IDirect3DDevice9Impl *)iface)->WineD3DDevice);
+    if (wined3d_shader)
     {
-        if (wined3d_shader)
-        {
-            *shader = IWineD3DVertexShader_GetParent(wined3d_shader);
-            IDirect3DVertexShader9_AddRef(*shader);
-            IWineD3DVertexShader_Release(wined3d_shader);
-        }
-        else
-        {
-            *shader = NULL;
-        }
+        *shader = IWineD3DVertexShader_GetParent(wined3d_shader);
+        IDirect3DVertexShader9_AddRef(*shader);
+        IWineD3DVertexShader_Release(wined3d_shader);
     }
     else
     {
-        WARN("Failed to get vertex shader, hr %#x.\n", hr);
+        *shader = NULL;
     }
     wined3d_mutex_unlock();
 
     TRACE("Returning %p.\n", *shader);
 
-    return hr;
+    return D3D_OK;
 }
 
 static HRESULT WINAPI IDirect3DDevice9Impl_SetVertexShaderConstantF(IDirect3DDevice9Ex *iface,
diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 6cd07bb..2197a5f 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -3208,18 +3208,18 @@ static HRESULT WINAPI IWineD3DDeviceImpl_SetVertexShader(IWineD3DDevice *iface,
     return WINED3D_OK;
 }
 
-static HRESULT WINAPI IWineD3DDeviceImpl_GetVertexShader(IWineD3DDevice *iface, IWineD3DVertexShader** ppShader) {
-    IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
+static IWineD3DVertexShader * WINAPI IWineD3DDeviceImpl_GetVertexShader(IWineD3DDevice *iface)
+{
+    IWineD3DDeviceImpl *device = (IWineD3DDeviceImpl *)iface;
+    IWineD3DVertexShader *shader;
 
-    if (NULL == ppShader) {
-        return WINED3DERR_INVALIDCALL;
-    }
-    *ppShader = This->stateBlock->vertexShader;
-    if( NULL != *ppShader)
-        IWineD3DVertexShader_AddRef(*ppShader);
+    TRACE("iface %p.\n", iface);
 
-    TRACE("(%p) : returning %p\n", This, *ppShader);
-    return WINED3D_OK;
+    shader = device->stateBlock->vertexShader;
+    if (shader) IWineD3DVertexShader_AddRef(shader);
+
+    TRACE("Returning %p.\n", shader);
+    return shader;
 }
 
 static HRESULT WINAPI IWineD3DDeviceImpl_SetVertexShaderConstantB(
diff --git a/include/wine/wined3d.idl b/include/wine/wined3d.idl
index 230d012..0b29432 100644
--- a/include/wine/wined3d.idl
+++ b/include/wine/wined3d.idl
@@ -3221,8 +3221,7 @@ interface IWineD3DDevice : IUnknown
     HRESULT SetVertexShader(
         [in] IWineD3DVertexShader *shader
     );
-    HRESULT GetVertexShader(
-        [out] IWineD3DVertexShader **shader
+    IWineD3DVertexShader *GetVertexShader(
     );
     HRESULT SetVertexShaderConstantB(
         [in] UINT start_register,
-- 
1.7.1