wined3d: Check the writemask before activating the oC0 optimization.

The comment above the code correctly mentions that this optimization does not work if oC0 is written partially, but the code doesn't actually check for this condition.

wined3d: Check the writemask before activating the oC0 optimization.
068915a4 · Stefan Dösinger · Alexandre Julliard · 6b794cbd · 068915a4
Commit 068915a4 authored Jul 20, 2010 by Stefan Dösinger Committed by Alexandre Julliard Jul 22, 2010
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shader.c dlls/wined3d/shader.c +2 -1

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--- a/dlls/wined3d/shader.c
+++ b/dlls/wined3d/shader.c
@@ -661,7 +661,8 @@ static HRESULT shader_get_registers_used(IWineD3DBaseShader *iface, const struct
                     * COLOROUT 0 is overwritten partially later, the marker is dropped again. */
                        ps->color0_mov = FALSE;
-                        if (ins.handler_idx == WINED3DSIH_MOV)
+                        if (ins.handler_idx == WINED3DSIH_MOV
+                                && dst_param.write_mask == WINED3DSP_WRITEMASK_ALL)
                        {
                            /* Used later when the source register is read. */
                            color0_mov = TRUE;