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{

   //直接操作缓存    char *buffer;   int x, y;   const GBVisualButton * pVisualButton =0;   int layer_width;   int row_width_in_byte;   gdi_layer_struct* next_layer;   U32     src_byte_per_pixel;   gdi_handle CurLayer;   pVisualButton = bt;   gdi_layer_get_active ( &CurLayer );   gdi_layer_get_buffer_ptr ( (U8 **)&buffer );   next_layer = (gdi_layer_struct*)CurLayer;      src_byte_per_pixel = next_layer->bits_per_pixel / 8;   row_width_in_byte = bt->comprect.w * src_byte_per_pixel;   for ( y = GET_BUTTON_RECT_Y(pLayout, bt); y < GET_BUTTON_RECT_Y(pLayout, bt)+bt->comprect.h - 1; y++ )   {     char * pRow = &buffer[(y * next_layer->width + GET_BUTTON_RECT_X(pLayout, bt))* src_byte_per_pixel];    char * pRowEnd = pRow + row_width_in_byte;    for(; pRow < pRowEnd; pRow++)    {      *pRow = ~(*pRow);//      if (pLayout == &s_HWLayout)//       *pRow = ~(*pRow);

    }

//     for ( x = GET_BUTTON_RECT_X(pLayout, bt); x < GET_BUTTON_RECT_X(pLayout, bt)+bt->comprect.w - 1; x++ )//     { //      buffer[(y * next_layer->width + x)* src_byte_per_pixel] = ~buffer[(y * next_layer->width + x)* src_byte_per_pixel];//      buffer[(y * next_layer->width + x)* src_byte_per_pixel + 1] = ~buffer[(y * next_layer->width + x)* src_byte_per_pixel + 1];//     } InvertActiveLayer();   }  }

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