//------------------------------------------------------------------------
    bool platform_specific::load_pmap(const char* fn, unsigned idx, 
                                      rendering_buffer* dst)
    {
        pixel_map pmap_tmp;
        if(!pmap_tmp.load_from_qt(fn)) return false;

        rendering_buffer rbuf_tmp;
        rbuf_tmp.attach(pmap_tmp.buf(),
                        pmap_tmp.width(),
                        pmap_tmp.height(),
                        m_flip_y ?
                         -pmap_tmp.row_bytes() :
                          pmap_tmp.row_bytes());

        m_pmap_img[idx].create(pmap_tmp.width(), 
                               pmap_tmp.height(), 
                               org_e(m_bpp),
                               0);

        dst->attach(m_pmap_img[idx].buf(),
                    m_pmap_img[idx].width(),
                    m_pmap_img[idx].height(),
                    m_flip_y ?
                      -m_pmap_img[idx].row_bytes() :
                       m_pmap_img[idx].row_bytes());

        switch(m_format)
        {
        case pix_format_gray8:
            return false;
            break;

        case pix_format_rgb555:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_rgb555()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_rgb555()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_rgb555()); break;
            }
            break;

        case pix_format_rgb565:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_rgb565()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_rgb565()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_rgb565()); break;
            }
            break;

        case pix_format_rgb24:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_rgb24()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_rgb24()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_rgb24()); break;
            }
            break;

        case pix_format_bgr24:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_bgr24()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_bgr24()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_bgr24()); break;
            }
            break;

        case pix_format_abgr32:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_abgr32()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_abgr32()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_abgr32()); break;
            }
            break;

        case pix_format_argb32:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_argb32()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_argb32()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_argb32()); break;
            }
            break;

        case pix_format_bgra32:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_bgra32()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_bgra32()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_bgra32()); break;
            }
            break;

        case pix_format_rgba32:
            switch(pmap_tmp.bpp())
            {
            case 16: color_conv(dst, &rbuf_tmp, color_conv_rgb555_to_rgba32()); break;
            case 24: color_conv(dst, &rbuf_tmp, color_conv_rgb24_to_rgba32()); break;
            case 32: color_conv(dst, &rbuf_tmp, color_conv_argb32_to_rgba32()); break;
            }
            break;
        }
        
        return true;
    }
  void platform_specific::display_pmap(Window dc, const rendering_buffer* rbuf) {
    DEBUG_MTH("platform_specific::display_map");
    if (m_format == m_sys_format) {
      if (m_ximage == 0) {
	m_ximage = x11.create_image(rbuf);
	m_ximage->byte_order = m_byte_order;
      }
      x11.put_image(dc, m_ximage);
      return;
    }
    // Optimization hint: make pmap_tmp as a private class member and reused it when possible.
    pixel_map pmap_tmp(rbuf->width(),
		       rbuf->height(),
		       m_sys_format,
		       256,
		       m_flip_y);
    rendering_buffer* rbuf2 = &pmap_tmp.rbuf();

    switch(m_sys_format)
      {
      case pix_format_rgb555:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_rgb555()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_rgb555()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_rgb555());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_rgb555());  break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_rgb555()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_rgb555()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_rgb555()); break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_rgb555()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
                    
      case pix_format_rgb565:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_rgb565()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_rgb565()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_rgb565());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_rgb565());  break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_rgb565()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_rgb565()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_rgb565()); break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_rgb565()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
	
      case pix_format_rgba32:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_rgba32()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_rgba32()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_rgba32());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_rgba32());  break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_rgba32()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_rgba32()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_rgba32()); break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_rgba32()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
	
      case pix_format_abgr32:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_abgr32()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_abgr32()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_abgr32());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_abgr32());  break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_abgr32()); break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_abgr32()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_abgr32()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_abgr32()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
	
      case pix_format_argb32:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_argb32()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_argb32()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_argb32());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_argb32());  break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_argb32()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_argb32()); break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_argb32()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_argb32()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
	
      case pix_format_bgra32:
	switch(m_format)
	  {
	  case pix_format_rgb555: color_conv(rbuf2, rbuf, color_conv_rgb555_to_bgra32()); break;
	  case pix_format_rgb565: color_conv(rbuf2, rbuf, color_conv_rgb565_to_bgra32()); break;
	  case pix_format_rgb24:  color_conv(rbuf2, rbuf, color_conv_rgb24_to_bgra32());  break;
	  case pix_format_bgr24:  color_conv(rbuf2, rbuf, color_conv_bgr24_to_bgra32());  break;
	  case pix_format_rgba32: color_conv(rbuf2, rbuf, color_conv_rgba32_to_bgra32()); break;
	  case pix_format_argb32: color_conv(rbuf2, rbuf, color_conv_argb32_to_bgra32()); break;
	  case pix_format_abgr32: color_conv(rbuf2, rbuf, color_conv_abgr32_to_bgra32()); break;
	  case pix_format_bgra32: color_conv(rbuf2, rbuf, color_conv_bgra32_to_bgra32()); break;
	    UNHANDLED_PIX_FORMATS;
	  }
	break;
	UNHANDLED_PIX_FORMATS;
      }
    pmap_tmp.draw(dc);

  }