From 9fc132d02f6185bbecf964df48acbbfbc508aa67 Mon Sep 17 00:00:00 2001
From: David Adam <David.Adam@math.cnrs.fr>
Date: Mon, 5 Nov 2007 19:30:49 +0100
Subject: [PATCH] d3dx8: Implement D3DXMatrixOrthoOffCenterRH.

---
 dlls/d3dx8/d3dx8.spec   |  2 +-
 dlls/d3dx8/math.c       | 12 ++++++++++++
 dlls/d3dx8/tests/math.c |  8 ++++++++
 include/d3dx8math.h     |  1 +
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/dlls/d3dx8/d3dx8.spec b/dlls/d3dx8/d3dx8.spec
index ca5759d294b..3e6c0926894 100644
--- a/dlls/d3dx8/d3dx8.spec
+++ b/dlls/d3dx8/d3dx8.spec
@@ -44,7 +44,7 @@
 @ stdcall D3DXMatrixPerspectiveOffCenterLH(ptr long long long long long long)
 @ stdcall D3DXMatrixOrthoRH(ptr long long long long)
 @ stdcall D3DXMatrixOrthoLH(ptr long long long long)
-@ stub D3DXMatrixOrthoOffCenterRH
+@ stdcall D3DXMatrixOrthoOffCenterRH(ptr long long long long long long)
 @ stub D3DXMatrixOrthoOffCenterLH
 @ stub D3DXMatrixShadow
 @ stub D3DXMatrixReflect
diff --git a/dlls/d3dx8/math.c b/dlls/d3dx8/math.c
index 7070895e604..666c05a5385 100644
--- a/dlls/d3dx8/math.c
+++ b/dlls/d3dx8/math.c
@@ -126,6 +126,18 @@ D3DXMATRIX* WINAPI D3DXMatrixOrthoLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT z
     return pout;
 }
 
+D3DXMATRIX* WINAPI D3DXMatrixOrthoOffCenterRH(D3DXMATRIX *pout, FLOAT l, FLOAT r, FLOAT b, FLOAT t, FLOAT zn, FLOAT zf)
+{
+    D3DXMatrixIdentity(pout);
+    pout->m[0][0] = 2.0f / (r - l);
+    pout->m[1][1] = 2.0f / (t - b);
+    pout->m[2][2] = 1.0f / (zn -zf);
+    pout->m[3][0] = -1.0f -2.0f *l / (r - l);
+    pout->m[3][1] = 1.0f + 2.0f * t / (b - t);
+    pout->m[3][2] = zn / (zn -zf);
+    return pout;
+}
+
 D3DXMATRIX* WINAPI D3DXMatrixOrthoRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf)
 {
     D3DXMatrixIdentity(pout);
diff --git a/dlls/d3dx8/tests/math.c b/dlls/d3dx8/tests/math.c
index 1b1048c3a4a..8b2ab5b767b 100644
--- a/dlls/d3dx8/tests/math.c
+++ b/dlls/d3dx8/tests/math.c
@@ -230,6 +230,14 @@ static void D3DXMatrixTest(void)
     D3DXMatrixOrthoLH(&gotmat, 2.5f, 7.4f, -3.2f, -9.8f);
     expect_mat(expectedmat,gotmat);
 
+/*____________D3DXMatrixOrthoOffCenterRH_______________*/
+    expectedmat.m[0][0] = 3.636364f; 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] = 0.180180f; 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] = 0.045662f; expectedmat.m[2][3] = 0.0f;
+    expectedmat.m[3][0] = -1.727272f; expectedmat.m[3][1] = -0.567568f; expectedmat.m[3][2] = 0.424658f; expectedmat.m[3][3] = 1.0f;
+    D3DXMatrixOrthoOffCenterRH(&gotmat, 0.2f, 0.75f, -2.4f, 8.7f, 9.3, -12.6);
+    expect_mat(expectedmat,gotmat);
+
 /*____________D3DXMatrixOrthoRH_______________*/
     expectedmat.m[0][0] = 0.8f; 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] = 0.270270f; expectedmat.m[1][2] = 0.0f; expectedmat.m[1][3] = 0.0f;
diff --git a/include/d3dx8math.h b/include/d3dx8math.h
index f17fd5c94cc..ecb6cd58ff9 100644
--- a/include/d3dx8math.h
+++ b/include/d3dx8math.h
@@ -63,6 +63,7 @@ D3DXMATRIX* WINAPI D3DXMatrixLookAtLH(D3DXMATRIX *pout, CONST D3DXVECTOR3 *peye,
 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 D3DXMatrixOrthoLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
+D3DXMATRIX* WINAPI D3DXMatrixOrthoOffCenterRH(D3DXMATRIX *pout, FLOAT l, FLOAT r, FLOAT b, FLOAT t, FLOAT zn, FLOAT zf);
 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);