wined3d: Fix a postpixelshader_blending bug.

dlls/d3d9/tests/visual.c

@@ -7857,7 +7857,7 @@ static void pixelshader_blending_test(IDirect3DDevice9 *device)
              * reports. On Vista Nvidia seems to report 0x00ffffff on Geforce7 cards. */
             color = getPixelColor(device, 320, 240);
             trace("[No blending] %s: expected %x  or 0x00ffffff, result=%x\n", test_formats[fmt_index].fmtName, test_formats[fmt_index].resultColorNoBlending, color);
-            todo_wine ok((color == 0x00ffffff) || (color == test_formats[fmt_index].resultColorNoBlending), "Offscreen failed for %s: expected garbage but color %#08x, matches the result we would have with blending. (todo)\n", test_formats[fmt_index].fmtName, color);
+            ok((color == 0x00ffffff) || (color == test_formats[fmt_index].resultColorNoBlending), "Offscreen failed for %s: expected no color blending but received it anyway.\n", test_formats[fmt_index].fmtName);
         }
 
         IDirect3DDevice9_SetTexture(device, 0, NULL);

dlls/wined3d/state.c

@@ -246,8 +246,9 @@ static void state_blend(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3D
         const GlPixelFormatDesc *glDesc;
         getFormatDescEntry(target->resource.format, &GLINFO_LOCATION, &glDesc);
 
-        /* When pixel shaders are used on a format that doesn't offer blending, disable blending else we could face a big performance penalty. */
-        if(!(glDesc->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING) && use_ps(stateblock->wineD3DDevice)) {
+        /* Disable blending in all cases even without pixelshaders. With blending on we could face a big performance penalty.
+         * The d3d9 visual test confirms the behavior. */
+        if(!(glDesc->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING)) {
             glDisable(GL_BLEND);
             checkGLcall("glDisable GL_BLEND");
             return;