d3dx9: Improve performance and memory usage in preshader constants setting.

dlls/d3dx9_36/d3dx9_private.h

@@ -129,14 +129,23 @@ enum pres_reg_tables
     PRES_REGTAB_FIRST_SHADER = PRES_REGTAB_CONST,
 };
 
+struct d3dx_const_param_eval_output
+{
+    struct d3dx_parameter *param;
+    unsigned int table;
+    enum D3DXPARAMETER_CLASS constant_class;
+    unsigned int register_index;
+    unsigned int register_count;
+};
+
 struct d3dx_const_tab
 {
     unsigned int input_count;
     D3DXCONSTANT_DESC *inputs;
     struct d3dx_parameter **inputs_param;
-    ID3DXConstantTable *ctab;
-    /* TODO: do not keep input constant structure
-       (use it only at the parse stage) */
+    unsigned int const_set_count;
+    unsigned int const_set_size;
+    struct d3dx_const_param_eval_output *const_set;
     const enum pres_reg_tables *regset2table;
 };