Add DotProduct3 support if supported by opengl.

dlls/d3d8/d3d8_private.h

@@ -266,6 +266,7 @@ struct IDirect3DDevice8Impl
 
     /* OpenGL Extension related */
     BOOL                          isMultiTexture;
+    BOOL                          isDot3;
     UINT                          TextureUnits;
     UINT                          clipPlanes;
     UINT                          maxLights;

dlls/d3d8/device.c

@@ -3409,9 +3409,13 @@ HRESULT  WINAPI  IDirect3DDevice8Impl_SetTextureStageState(LPDIRECT3DDEVICE8 ifa
                     break;
 
                 case D3DTOP_DOTPRODUCT3               :
-                    /*glTexEnvi(GL_TEXTURE_ENV, Parm, GL_DOT3_RGBA);
-                    checkGLcall("glTexEnvi(GL_TEXTURE_ENV, comb_target, GL_DOT3_RGBA);");
-                    break;*/
+                    if (This->isDot3) {
+                        glTexEnvi(GL_TEXTURE_ENV, Parm, GL_DOT3_RGBA);
+                        checkGLcall("glTexEnvi(GL_TEXTURE_ENV, comb_target, GL_DOT3_RGBA);");
+                    } else {
+                        FIXME("DotProduct3 extension requested but not supported via this version of opengl\n");
+                    }
+                    break;
 
                 case D3DTOP_SUBTRACT                  :
                     /* glTexEnvi(GL_TEXTURE_ENV, Parm, GL_SUBTRACT); Missing? */

dlls/d3d8/directx.c

@@ -573,6 +573,7 @@ HRESULT  WINAPI  IDirect3D8Impl_CreateDevice               (LPDIRECT3D8 iface,
 
     /* Initialize openGL extension related variables */
     object->isMultiTexture = FALSE;
+    object->isDot3         = FALSE;
     object->TextureUnits   = 1;
 
     /* Retrieve opengl defaults */
@@ -607,6 +608,9 @@ HRESULT  WINAPI  IDirect3D8Impl_CreateDevice               (LPDIRECT3D8 iface,
             object->isMultiTexture = TRUE;
             object->TextureUnits   = min(8, gl_max);
             TRACE("FOUND: Multitexture support - GL_MAX_TEXTURE_UNITS_ARB=%d\n", gl_max);
+        } else if (strcmp(ThisExtn, "GL_EXT_texture_env_dot3") == 0) {
+            object->isDot3 = TRUE;
+            TRACE("FOUND: Dot3 support\n");
         }
 
         if (*GL_Extensions == ' ') GL_Extensions++;