Stefan Dösinger : wined3d: Use 0/0/ 0 as normal if no normal is supplied.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 8c9c084004356d9605c33ca013192a395dce8127
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=8c9c084004356d9605c33ca013...

Author: Stefan Dösinger <stefan(a)codeweavers.com>
Date:   Tue Aug 21 18:05:27 2007 +0200

wined3d: Use 0/0/0 as normal if no normal is supplied.

---

 dlls/wined3d/drawprim.c |    2 +-
 dlls/wined3d/state.c    |   18 +++++++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/dlls/wined3d/drawprim.c b/dlls/wined3d/drawprim.c
index 3b45db3..0cc6789 100644
--- a/dlls/wined3d/drawprim.c
+++ b/dlls/wined3d/drawprim.c
@@ -350,7 +350,7 @@ static void drawStridedSlow(IWineD3DDevice *iface, WineDirect3DVertexStridedData
 
     /* Default settings for data that is not passed */
     if (sd->u.s.normal.lpData == NULL) {
-        glNormal3f(0, 0, 1);
+        glNormal3f(0, 0, 0);
     }
     if(sd->u.s.diffuse.lpData == NULL) {
         glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
diff --git a/dlls/wined3d/state.c b/dlls/wined3d/state.c
index 4b38e40..fe25e4b 100644
--- a/dlls/wined3d/state.c
+++ b/dlls/wined3d/state.c
@@ -1196,7 +1196,16 @@ static void state_zbias(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3D
 
 
 static void state_normalize(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
-    if (stateblock->renderState[WINED3DRS_NORMALIZENORMALS]) {
+    if(isStateDirty(context, STATE_VDECL)) {
+        return;
+    }
+    /* Without vertex normals, we set the current normal to 0/0/0 to remove the diffuse factor
+     * from the opengl lighting equation, as d3d does. Normalization of 0/0/0 can lead to a division
+     * by zero and is not properly defined in opengl, so avoid it
+     */
+    if (stateblock->renderState[WINED3DRS_NORMALIZENORMALS] && (
+        stateblock->wineD3DDevice->strided_streams.u.s.normal.lpData ||
+        stateblock->wineD3DDevice->strided_streams.u.s.normal.VBO)) {
         glEnable(GL_NORMALIZE);
         checkGLcall("glEnable(GL_NORMALIZE);");
     } else {
@@ -3031,8 +3040,8 @@ static void loadVertexData(IWineD3DStateBlockImpl *stateblock, WineDirect3DVerte
         checkGLcall("glEnableClientState(GL_NORMAL_ARRAY)");
 
     } else {
-        glNormal3f(0, 0, 1);
-        checkGLcall("glNormal3f(0, 0, 1)");
+        glNormal3f(0, 0, 0);
+        checkGLcall("glNormal3f(0, 0, 0)");
     }
 
     /* Diffuse Colour --------------------------------------------*/
@@ -3307,6 +3316,9 @@ static void vertexdeclaration(DWORD state, IWineD3DStateBlockImpl *stateblock, W
         if(context->last_was_vshader && !isStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPLANEENABLE))) {
             state_clipping(STATE_RENDER(WINED3DRS_CLIPPLANEENABLE), stateblock, context);
         }
+        if(!isStateDirty(context, STATE_RENDER(WINED3DRS_NORMALIZENORMALS))) {
+            state_normalize(STATE_RENDER(WINED3DRS_NORMALIZENORMALS), stateblock, context);
+        }
     } else {
         /* We compile the shader here because we need the vertex declaration
          * in order to determine if we need to do any swizzling for D3DCOLOR