d3dx8: Implement D3DXMatrixPerspectiveOrthoRH.

dlls/d3dx8/d3dx8.spec

@@ -42,7 +42,7 @@
 @ stdcall D3DXMatrixPerspectiveFovLH(ptr long long long long)
 @ stdcall D3DXMatrixPerspectiveOffCenterRH(ptr long long long long long long)
 @ stdcall D3DXMatrixPerspectiveOffCenterLH(ptr long long long long long long)
-@ stub D3DXMatrixOrthoRH
+@ stdcall D3DXMatrixOrthoRH(ptr long long long long)
 @ stub D3DXMatrixOrthoLH
 @ stub D3DXMatrixOrthoOffCenterRH
 @ stub D3DXMatrixOrthoOffCenterLH

dlls/d3dx8/math.c

@@ -116,6 +116,16 @@ D3DXMATRIX* WINAPI D3DXMatrixMultiply(D3DXMATRIX *pout, CONST D3DXMATRIX *pm1, C
     return pout;
 }
 
+D3DXMATRIX* WINAPI D3DXMatrixOrthoRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf)
+{
+    D3DXMatrixIdentity(pout);
+    pout->m[0][0] = 2.0f / w;
+    pout->m[1][1] = 2.0f / h;
+    pout->m[2][2] = 1.0f / (zn - zf);
+    pout->m[3][2] = zn / (zn - zf);
+    return pout;
+}
+
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveFovLH(D3DXMATRIX *pout, FLOAT fovy, FLOAT aspect, FLOAT zn, FLOAT zf)
 {
     D3DXMatrixIdentity(pout);

dlls/d3dx8/tests/math.c

@@ -222,6 +222,12 @@ static void D3DXMatrixTest(void)
     D3DXMatrixMultiply(&gotmat,&mat,&mat2);
     expect_mat(expectedmat,gotmat);
 
+/*____________D3DXMatrixOrthoRH_______________*/
+    D3DXMatrixIdentity(&expectedmat);
+    expectedmat.m[0][0] = 0.8f; expectedmat.m[1][1] = 0.270270f; expectedmat.m[2][2] = 0.151515f; expectedmat.m[3][2] = -0.484848f;
+    D3DXMatrixOrthoRH(&gotmat, 2.5f, 7.4f, -3.2f, -9.8f);
+    expect_mat(expectedmat,gotmat);
+
 /*____________D3DXMatrixPerspectiveFovLH_______________*/
     expectedmat.m[0][0] = 13.288858f; expectedmat.m[0][1] = 0.0f; expectedmat.m[0][2] = 0.0f; expectedmat.m[0][3] = 0.0f;
     expectedmat.m[1][0] = 0.0f; expectedmat.m[1][1] = 9.966644f; expectedmat.m[1][2] = 0.0; expectedmat.m[1][3] = 0.0f;

include/d3dx8math.h

@@ -62,6 +62,7 @@ FLOAT WINAPI D3DXMatrixfDeterminant(CONST D3DXMATRIX *pm);
 D3DXMATRIX* WINAPI D3DXMatrixLookAtLH(D3DXMATRIX *pout, CONST D3DXVECTOR3 *peye, CONST D3DXVECTOR3 *pat, CONST D3DXVECTOR3 *pup);
 D3DXMATRIX* WINAPI D3DXMatrixLookAtRH(D3DXMATRIX *pout, CONST D3DXVECTOR3 *peye, CONST D3DXVECTOR3 *pat, CONST D3DXVECTOR3 *pup);
 D3DXMATRIX* WINAPI D3DXMatrixMultiply(D3DXMATRIX *pout, CONST D3DXMATRIX *pm1, CONST D3DXMATRIX *pm2);
+D3DXMATRIX* WINAPI D3DXMatrixOrthoRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveFovLH(D3DXMATRIX *pout, FLOAT fovy, FLOAT aspect, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveFovRH(D3DXMATRIX *pout, FLOAT fovy, FLOAT aspect, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);