wined3d: Color keying emulation.

dlls/wined3d/device.c

@@ -3212,21 +3212,42 @@ HRESULT WINAPI IWineD3DDeviceImpl_SetRenderState(IWineD3DDevice *iface, D3DRENDE
         break;
 
     case WINED3DRS_ALPHATESTENABLE           :
-        if (Value) {
+    case WINED3DRS_ALPHAFUNC                 :
+    case WINED3DRS_ALPHAREF                  :
+    case WINED3DRS_COLORKEYENABLE            :
+        {
+            int glParm = 0.0;
+            float ref = GL_LESS;
+            BOOL enable_ckey = FALSE;
+
+            IWineD3DSurfaceImpl *surf;
+
+            /* Find out if the texture on the first stage has a ckey set */
+            if(This->stateBlock->textures[0]) {
+                surf = (IWineD3DSurfaceImpl *) ((IWineD3DTextureImpl *)This->stateBlock->textures[0])->surfaces[0];
+                if(surf->CKeyFlags & DDSD_CKSRCBLT) enable_ckey = TRUE;
+            }
+
+            if (This->stateBlock->renderState[WINED3DRS_ALPHATESTENABLE] ||
+                (This->stateBlock->renderState[WINED3DRS_COLORKEYENABLE] && enable_ckey)) {
                 glEnable(GL_ALPHA_TEST);
                 checkGLcall("glEnable GL_ALPHA_TEST");
             } else {
                 glDisable(GL_ALPHA_TEST);
                 checkGLcall("glDisable GL_ALPHA_TEST");
-        }
+                /* Alpha test is disabled, don't bother setting the params - it will happen on the next
+                 * enable call
+                 */
                  break;
+            }
 
-    case WINED3DRS_ALPHAFUNC                 :
-        {
-            int glParm = GL_LESS;
-            float ref = ((float) This->stateBlock->renderState[WINED3DRS_ALPHAREF]) / 255.0f;
+            if(This->stateBlock->renderState[WINED3DRS_COLORKEYENABLE] && enable_ckey) {
+                glParm = GL_NOTEQUAL;
+                ref = 0.0;
+            } else {
+                ref = ((float) This->stateBlock->renderState[WINED3DRS_ALPHAREF]) / 255.0f;
 
-            switch ((D3DCMPFUNC) Value) {
+                switch ((D3DCMPFUNC) This->stateBlock->renderState[WINED3DRS_ALPHAFUNC]) {
                 case D3DCMP_NEVER:         glParm = GL_NEVER; break;
                 case D3DCMP_LESS:          glParm = GL_LESS; break;
                 case D3DCMP_EQUAL:         glParm = GL_EQUAL; break;
@@ -3238,20 +3259,8 @@ HRESULT WINAPI IWineD3DDeviceImpl_SetRenderState(IWineD3DDevice *iface, D3DRENDE
                 default:
                     FIXME("Unrecognized/Unhandled D3DCMPFUNC value %ld\n", Value);
                 }
-            TRACE("glAlphaFunc with Parm=%x, ref=%f\n", glParm, ref);
-            glAlphaFunc(glParm, ref);
-            This->alphafunc = glParm;
-            checkGLcall("glAlphaFunc");
             }
-        break;
-
-    case WINED3DRS_ALPHAREF                  :
-        {
-            int glParm = This->alphafunc;
-            float ref = 1.0f;
-
-            ref = ((float) Value) / 255.0f;
-            TRACE("glAlphaFunc with Parm=%x, ref=%f\n", glParm, ref);
+            This->alphafunc = glParm;
             glAlphaFunc(glParm, ref);
             checkGLcall("glAlphaFunc");
         }
@@ -5231,6 +5240,21 @@ HRESULT WINAPI IWineD3DDeviceImpl_SetTexture(IWineD3DDevice *iface, DWORD Stage,
         IWineD3DBaseTexture_Release(oldTexture);
     }
 
+    /* Reset color keying */
+    if(Stage == 0 && This->stateBlock->renderState[WINED3DRS_COLORKEYENABLE]) {
+        BOOL enable_ckey = FALSE;
+
+        if(pTexture) {
+            IWineD3DSurfaceImpl *surf = (IWineD3DSurfaceImpl *) ((IWineD3DTextureImpl *)pTexture)->surfaces[0];
+            if(surf->CKeyFlags & DDSD_CKSRCBLT) enable_ckey = TRUE;
+        }
+
+        if(enable_ckey) {
+            glAlphaFunc(GL_NOTEQUAL, 0.0);
+            checkGLcall("glAlphaFunc");
+        }
+    }
+
     return WINED3D_OK;
 }