d3dx8: Implement D3DXPlaneColorAdd.

dlls/d3dx8/tests/math.c

@@ -43,6 +43,18 @@ static void D3DXColorTest(void)
     color2.r = 0.3f; color2.g = 0.5f; color2.b = 0.76f; color2.a = 0.11f;
     scale = 0.3f;
 
+/*_______________D3DXColorAdd________________*/
+    expected.r = 0.9f; expected.g = 1.05f; expected.b = 0.99f, expected.a = 0.93f;
+    D3DXColorAdd(&got,&color1,&color2);
+    expect_color(expected,got);
+    /* Test the NULL case */
+    funcpointer = D3DXColorAdd(&got,NULL,&color2);
+    ok(funcpointer == NULL, "Expected: %p, Got: %p\n", NULL, funcpointer);
+    funcpointer = D3DXColorAdd(NULL,NULL,&color2);
+    ok(funcpointer == NULL, "Expected: %p, Got: %p\n", NULL, funcpointer);
+    funcpointer = D3DXColorAdd(NULL,NULL,NULL);
+    ok(funcpointer == NULL, "Expected: %p, Got: %p\n", NULL, funcpointer);
+
 /*_______________D3DXColorLerp________________*/
     expected.r = 0.32f; expected.g = 0.69f; expected.b = 0.356f; expected.a = 0.897f;
     D3DXColorLerp(&got,&color,&color1,scale);

include/d3dx8math.inl

@@ -21,6 +21,16 @@
 
 /*_______________D3DXCOLOR_____________________*/
 
+static inline D3DXCOLOR* D3DXColorAdd(D3DXCOLOR *pout, CONST D3DXCOLOR *pc1, CONST D3DXCOLOR *pc2)
+{
+    if ( !pout || !pc1 || !pc2 ) return NULL;
+    pout->r = (pc1->r) + (pc2->r);
+    pout->g = (pc1->g) + (pc2->g);
+    pout->b = (pc1->b) + (pc2->b);
+    pout->a = (pc1->a) + (pc2->a);
+    return pout;
+}
+
 static inline D3DXCOLOR* D3DXColorLerp(D3DXCOLOR *pout, CONST D3DXCOLOR *pc1, CONST D3DXCOLOR *pc2, FLOAT s)
 {
     if ( !pout || !pc1 || !pc2 ) return NULL;