Function RenderScript_EnableState

engine/render/src/render/render_script.cpp:694–717

enables a render state * * Enables a particular render state. The state will be enabled until disabled. * * @name render.enable_state * @param state [type:constant] state to enable * * - `graphics.STATE_DEPTH_TEST` * - `graphics.STATE_STENCIL_TEST` * - `graphics.STATE_BLEND` * - `graphics.STATE_ALPHA_TEST` ([icon:iOS][icon:android] not available on

     * ```
     */
    int RenderScript_EnableState(lua_State* L)
    {
        int top = lua_gettop(L);
        (void) top;

        RenderScriptInstance* i = RenderScriptInstance_Check(L);
        uint32_t state = luaL_checkinteger(L, 1);

        if (state != dmGraphics::STATE_DEPTH_TEST &&
            state != dmGraphics::STATE_STENCIL_TEST &&
            state != dmGraphics::STATE_ALPHA_TEST &&
            state != dmGraphics::STATE_BLEND &&
            state != dmGraphics::STATE_CULL_FACE &&
            state != dmGraphics::STATE_POLYGON_OFFSET_FILL)
        {
            return luaL_error(L, "Invalid state: %s.enable_state(%d).", RENDER_SCRIPT_LIB_NAME, state);
        }
        if (InsertCommand(i, Command(COMMAND_TYPE_ENABLE_STATE, state))) {
            assert(top == lua_gettop(L));
            return 0;
        } else {
            return luaL_error(L, "Command buffer is full (%d).", i->m_CommandBuffer.Capacity());
        }
    }

    /*# disables a render state
     *