/*
Copyright (C) 1994-1998 The XFree86 Project, Inc.  All Rights Reserved.

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, FIT-
NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
XFREE86 PROJECT 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.

Except as contained in this notice, the name of the XFree86 Project shall not
be used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the XFree86 Project.
*/

/* This file contains the data structures which map the X ROPs to the
 * ViRGE ROPs. It also contains other mappings which are used when supporting
 * planemasks and transparency.
 *
 * Created by Sebastien Marineau, 29/03/97.
 * This file should be included only from s3v_accel.c to avoid 
 * duplicate symbols. 
 * 
 */

#include "regs3v.h"

static int s3vAlu[16] =
{
   ROP_0,               /* GXclear */
   ROP_DSa,             /* GXand */
   ROP_SDna,            /* GXandReverse */
   ROP_S,               /* GXcopy */
   ROP_DSna,            /* GXandInverted */
   ROP_D,               /* GXnoop */
   ROP_DSx,             /* GXxor */
   ROP_DSo,             /* GXor */
   ROP_DSon,            /* GXnor */
   ROP_DSxn,            /* GXequiv */
   ROP_Dn,              /* GXinvert*/
   ROP_SDno,            /* GXorReverse */
   ROP_Sn,              /* GXcopyInverted */
   ROP_DSno,            /* GXorInverted */
   ROP_DSan,            /* GXnand */
   ROP_1                /* GXset */
};

/* S -> P, for solid and pattern fills. */
static int s3vAlu_sp[16]=
{
   ROP_0,
   ROP_DPa,
   ROP_PDna,
   ROP_P,
   ROP_DPna,
   ROP_D,
   ROP_DPx,
   ROP_DPo,
   ROP_DPon,
   ROP_DPxn,
   ROP_Dn,
   ROP_PDno,
   ROP_Pn,
   ROP_DPno,
   ROP_DPan,
   ROP_1
};

/* ROP  ->  (ROP & P) | (D & ~P) */
/* These are used to support a planemask for S->D ops */
static int s3vAlu_pat[16] =
{
   ROP_0_PaDPnao,
   ROP_DSa_PaDPnao,
   ROP_SDna_PaDPnao,
   ROP_S_PaDPnao,
   ROP_DSna_PaDPnao,
   ROP_D_PaDPnao,
   ROP_DSx_PaDPnao,
   ROP_DSo_PaDPnao,
   ROP_DSon_PaDPnao,
   ROP_DSxn_PaDPnao,
   ROP_Dn_PaDPnao,
   ROP_SDno_PaDPnao,
   ROP_Sn_PaDPnao,
   ROP_DSno_PaDPnao,
   ROP_DSan_PaDPnao,
   ROP_1_PaDPnao
};

/* ROP_sp -> (ROP_sp & S) | (D & ~S) */
/* This is used for our transparent mono pattern fills to support trans/plane*/
static int s3vAlu_MonoTrans[16] =
{
   ROP_0_SaDSnao,
   ROP_DPa_SaDSnao,
   ROP_PDna_SaDSnao,
   ROP_P_SaDSnao,
   ROP_DPna_SaDSnao,
   ROP_D_SaDSnao,
   ROP_DPx_SaDSnao,
   ROP_DPo_SaDSnao,
   ROP_DPon_SaDSnao,
   ROP_DPxn_SaDSnao,
   ROP_Dn_SaDSnao,
   ROP_PDno_SaDSnao,
   ROP_Pn_SaDSnao,
   ROP_DPno_SaDSnao,
   ROP_DPan_SaDSnao,
   ROP_1_SaDSnao
};



/* This function was taken from accel/s3v.h. It adjusts the width
 * of transfers for mono images to works around some bugs.
 */

static __inline__ int S3VCheckLSPN(S3VPtr ps3v, int w, int dir)
{
   int lspn = (w * ps3v->Bpp) & 63;  /* scanline width in bytes modulo 64*/

   if (ps3v->Bpp == 1) {
      if (lspn <= 8*1)
	 w += 16;
      else if (lspn <= 16*1)
	 w += 8;
   } else if (ps3v->Bpp == 2) {
      if (lspn <= 4*2)
	 w += 8;
      else if (lspn <= 8*2)
	 w += 4;
   } else {  /* ps3v->Bpp == 3 */
      if (lspn <= 3*3) 
	 w += 6;
      else if (lspn <= 6*3)
	 w += 3;
   }
   if (dir && w >= ps3v->bltbug_width1 && w <= ps3v->bltbug_width2) {
      w = ps3v->bltbug_width2 + 1;
   }

   return w;
}

/* And this adjusts color bitblts widths to work around GE bugs */

static __inline__ int S3VCheckBltWidth(S3VPtr ps3v, int w)
{
   if (w >= ps3v->bltbug_width1 && w <= ps3v->bltbug_width2) {
      w = ps3v->bltbug_width2 + 1;
   }
   return w;
}

/* This next function determines if the Source operand is present in the
 * given ROP. The rule is that both the lower and upper nibble of the rop
 * have to be neither 0x00, 0x05, 0x0a or 0x0f. If a CPU-Screen blit is done
 * with a ROP which does not contain the source, the virge will hang when
 * data is written to the image transfer area. 
 */

static __inline__ Bool S3VROPHasSrc(int shifted_rop)
{
    int rop = (shifted_rop & (0xff << 17)) >> 17;

    if ((((rop & 0x0f) == 0x0a) | ((rop & 0x0f) == 0x0f) 
        | ((rop & 0x0f) == 0x05) | ((rop & 0x0f) == 0x00)) &
       (((rop & 0xf0) == 0xa0) | ((rop & 0xf0) == 0xf0) 
        | ((rop & 0xf0) == 0x50) | ((rop & 0xf0) == 0x00)))
            return FALSE;
    else 
            return TRUE;
}

/* This next function determines if the Destination operand is present in the
 * given ROP. The rule is that both the lower and upper nibble of the rop
 * have to be neither 0x00, 0x03, 0x0c or 0x0f. 
 */

static __inline__ Bool S3VROPHasDst(int shifted_rop)
{
    int rop = (shifted_rop & (0xff << 17)) >> 17;

    if ((((rop & 0x0f) == 0x0c) | ((rop & 0x0f) == 0x0f) 
        | ((rop & 0x0f) == 0x03) | ((rop & 0x0f) == 0x00)) &
       (((rop & 0xf0) == 0xc0) | ((rop & 0xf0) == 0xf0) 
        | ((rop & 0xf0) == 0x30) | ((rop & 0xf0) == 0x00)))
            return FALSE;
    else 
            return TRUE;
}