text: /* $Id: line.c,v 1.4 2006/03/12 23:15:05 soyt Exp $
  ******************************************************************************
  
     LibGGI - Millennium II acceleration for fbdev target
  
     Copyright (C) 1999 Marcus Sundberg	[marcus@ggi-project.org]
  
     Permission is hereby granted, free of charge, to any person obtaining a
     copy of this software and associated documentation files (the "Software"),
     to deal in the Software without restriction, including without limitation
     the rights to use, copy, modify, merge, publish, distribute, sublicense,
     and/or sell copies of the Software, and to permit persons to whom the
     Software is furnished to do so, subject to the following conditions:
  
     The above copyright notice and this permission notice shall be included in
     all copies or substantial portions of the Software.
  
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     THE AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
     IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  ******************************************************************************
  */
  
  #include "m2164w.h"
  
  
  int GGI_m2164w_drawline(struct ggi_visual *vis, int x, int y, int x2, int y2)
  {
  	struct m2164w_priv *priv = M2164W_PRIV(vis);
  	volatile uint8_t *mmioaddr = FBDEV_PRIV(vis)->mmioaddr;
  	int yadd = vis->w_frame_num * LIBGGI_VIRTY(vis);
  	uint32_t dwgctl;
  
  	if (yadd) {
  		y += yadd;
  		y2 += yadd;
  	}
  
  	dwgctl = OP_AUTOLINE_CLOSE | SOLID | SHFTZERO | BOP_COPY |
  		BLTMOD_BFCOL;
  
  	mga_gcupdate(mmioaddr, priv, LIBGGI_MODE(vis), LIBGGI_GC(vis),
  		     LIBGGI_VIRTX(vis), yadd);
  
  	if (priv->dwgctl != dwgctl) {
  		mga_waitfifo(mmioaddr, 3);
  		mga_setdwgctl(mmioaddr, priv, dwgctl);
  	} else {
  		mga_waitfifo(mmioaddr, 2);
  	}
  	mga_out32(mmioaddr, (unsigned)RS16(x) | (RS16(y) << 16), XYSTRT);
  	mga_out32(mmioaddr, (unsigned)RS16(x2) | (RS16(y2) << 16),
  		  XYEND | EXECUTE);
  
  	vis->accelactive = 1;
  
  	return 0;
  }
  