d3dx8: Implement D3DXMatrixPerspectiveLH.

dlls/d3dx8/d3dx8.spec

@@ -37,7 +37,7 @@
 @ stdcall D3DXMatrixLookAtRH(ptr ptr ptr ptr ptr)
 @ stdcall D3DXMatrixLookAtLH(ptr ptr ptr ptr)
 @ stdcall D3DXMatrixPerspectiveRH(ptr long long long long)
-@ stub D3DXMatrixPerspectiveLH
+@ stdcall D3DXMatrixPerspectiveLH(ptr long long long long)
 @ stub D3DXMatrixPerspectiveFovRH
 @ stub D3DXMatrixPerspectiveFovLH
 @ stub D3DXMatrixPerspectiveOffCenterRH

dlls/d3dx8/math.c

@@ -116,6 +116,18 @@ D3DXMATRIX* WINAPI D3DXMatrixMultiply(D3DXMATRIX *pout, CONST D3DXMATRIX *pm1, C
     return pout;
 }
 
+D3DXMATRIX* WINAPI D3DXMatrixPerspectiveLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf)
+{
+    D3DXMatrixIdentity(pout);
+    pout->m[0][0] = 2.0f * zn / w;
+    pout->m[1][1] = 2.0f * zn / h;
+    pout->m[2][2] = zf / (zf - zn);
+    pout->m[3][2] = (zn * zf) / (zn - zf);
+    pout->m[2][3] = 1.0f;
+    pout->m[3][3] = 0.0f;
+    return pout;
+}
+
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf)
 {
     D3DXMatrixIdentity(pout);

dlls/d3dx8/tests/math.c

@@ -222,6 +222,14 @@ static void D3DXMatrixTest(void)
     D3DXMatrixMultiply(&gotmat,&mat,&mat2);
     expect_mat(expectedmat,gotmat);
 
+/*____________D3DXMatrixPerspectiveLH_______________*/
+    expectedmat.m[0][0] = -24.0f; 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] = -6.4f; expectedmat.m[1][2] = 0.0; expectedmat.m[1][3] = 0.0f;
+    expectedmat.m[2][0] = 0.0f; expectedmat.m[2][1] = 0.0f; expectedmat.m[2][2] = 0.783784f; expectedmat.m[2][3] = 1.0f;
+    expectedmat.m[3][0] = 0.0f; expectedmat.m[3][1] = 0.0f; expectedmat.m[3][2] = 1.881081f; expectedmat.m[3][3] = 0.0f;
+    D3DXMatrixPerspectiveLH(&gotmat, 0.2f, 0.75f, -2.4f, 8.7f);
+    expect_mat(expectedmat,gotmat);
+
 /*____________D3DXMatrixPerspectiveRH_______________*/
     expectedmat.m[0][0] = -24.0f; 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] = -6.4f; 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 D3DXMatrixPerspectiveLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixRotationAxis(D3DXMATRIX *pout, CONST D3DXVECTOR3 *pv, FLOAT angle);
 D3DXMATRIX* WINAPI D3DXMatrixRotationQuaternion(D3DXMATRIX *pout, CONST D3DXQUATERNION *pq);