📄 m8b_lin.c
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/*************************************************************************/
/* */
/* Copyright (c) 1997 - 1999 Accelerated Technology, Inc. */
/* */
/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the */
/* subject matter of this material. All manufacturing, reproduction, */
/* use, and sales rights pertaining to this subject matter are governed */
/* by the license agreement. The recipient of this software implicitly */
/* accepts the terms of the license. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FILE NAME VERSION */
/* */
/* m8b_lin.c 1.9 */
/* */
/* COMPONENT */
/* */
/* All */
/* */
/* DESCRIPTION */
/* */
/* This file contains the thin line drawing functions for 8 bit */
/* memory. */
/* */
/* AUTHOR */
/* */
/* Robert G. Burrill, Accelerated Technology, Inc. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* None */
/* */
/* DEPENDENCIES */
/* */
/* None */
/* */
/* HISTORY */
/* */
/* NAME DATE REMARKS */
/* */
/* BobB 5/7/98 Removed unused line */
/* BobB 11/18/99 Corrected region clipping test */
/* */
/*************************************************************************/
#include "meta_wnd.h"
#include "metconst.h" /* MetaWINDOW Constant & Stucture Definitions */
#include "metports.h" /* MetaWINDOW Port & Bitmap Definitions */
#include "metaproc.h"
#include "grafdata.h"
#include "blit_5.h"
/* Function mwLIA is a special case optimization for thin line
drawing to 8 bit memory destinations, rectangular and/or region
clipping. */
void mwLIA(blitRcd *lineRec)
{
void ClipAndDrawEntry(void);
int Set_Up_Clip(blitRcd *clipBlit, rect *clipR, int blitMayOverlap,
int isLine);
int Line_Clip_Region(int rectCnt, lineS *destRect);
void nuResume(grafMap *argGRAFMAP);
void M8BURTable(void);
void M8BMRTable(void);
void M8BMOTable(void);
void M8BUXTable(void);
void M8BMXTable(void);
void M8BMATable(void);
void M8BMO_NDTable(void);
void M8BMA_NDTable(void);
void QuickEnd(void);
lineS *listPtr; /* Pointer to line to draw */
int blitMayOverlap = 0; /* Set false */
int isLine = 1; /* Set true */
/* Table used to NOT the source color according to raster op. */
byte FlipTable[16] = {0, 0, 0, 0xff,
0xff, 0xff, 0xff, 0,
0, 0, 0, 0,
0, 0xff, 0, 0xff};
/* Table used to force the source color to 0xff according to raster op. */
byte ForceTableOr[16] = {0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0xff, 0, 0xff, 0};
/* Table used to force the source color to 0 according to raster op. */
byte ForceTableAnd[16] = {0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff};
/* set up the rectangular/region clip info */
if (Set_Up_Clip(lineRec, &cRect, blitMayOverlap, isLine)) return;
/* do we need to worry about region clipping */
/* BobB 11/18/99 - corrected the following line
if (clipToRectFlag == 0) */
if (clipToRegionFlag == 0)
{ /* no--valid coordinates are guaranteed at a higher level */
cRect.Xmax--; /* the clipping code expects an old-style
Metawindow clip rect */
cRect.Ymax--;
}
else
{ /* yes, copy the clip rect to the base, unchanging clip rect */
bcXmin = cRect.Xmin;
bcYmin = cRect.Ymin;
bcXmax = cRect.Xmax - 1;
bcYmax = cRect.Ymax - 1;
}
listPtr = (lineS *) lineRec->blitList; /* set up local variables */
rectCnt = lineRec->blitCnt;
lclPortMask = lineRec->blitMask;
dstClass = lineRec->blitRop;
if (lineRec->blitPat == 0) /* pattern 0? */
{ /* yes, use background color */
if (dstClass & 0x10) return; /* done if transparent */
lclPenColor = (byte) lineRec->blitBack;
}
else
{ /* pattern 1 is the only other possibility */
lclPenColor = (byte) lineRec->blitFore;
}
dstClass = dstClass & 0x0f; /* we don't care about transparency */
lclPenColor = lclPenColor ^ FlipTable[dstClass]; /* NOT the
color if appropriate */
lclPenColor = lclPenColor | ForceTableOr[dstClass]; /* make
the color 0xff if appropriate */
lclPenColor = lclPenColor & ForceTableAnd[dstClass]; /* make
the color 0 if appropriate */
dstBmap = lineRec->blitDmap;
M_PAUSE(dstBmap); /* lock grafMap */
dstWidth = dstBmap->pixBytes;
rowTablePtr[1] = (long *) dstBmap->mapTable[0];
switch (dstClass)
{ /* look up the optimization routine */
/* LCD non-transparent */
case 0: /* zREPz : src */
case 4: /* zNREPz : (NOT src) */
case 8: /* zCLEARz : 0's */
case 12: /* zSETz : 1's */
if (lclPortMask == 0xff)
{ /* unmasked */
optPtr = &M8BURTable;
}
else
{ /* masked */
optPtr = &M8BMRTable;
}
break;
case 1: /* zORz : src OR dst */
case 5: /* zNORz : (NOT src) OR dst */
optPtr = &M8BMOTable;
break;
case 2: /* zXORz : src XOR dst */
case 6: /* zNXORz : (NOT src) XOR dst */
case 14: /* zINVERTz: (NOT dst) */
if (lclPortMask == 0xff)
{ /* unmasked */
optPtr = &M8BUXTable;
}
else
{ /* masked */
optPtr = &M8BMXTable;
}
break;
case 3: /* zNANDz : (NOT src) AND dst */
case 7: /* zANDz : src AND dst */
optPtr = &M8BMATable;
break;
case 9: /* zORNz : src OR (NOT dst) */
case 13: /* zNORNz : (NOT src) OR (NOT dst) */
optPtr = &M8BMO_NDTable;
break;
case 10: /* zNOPz : dst <NOP> */
optPtr = &QuickEnd;
break;
case 11: /* zANDNz : src AND (NOT dst) */
case 15: /* zNANDNz : (NOT src) AND (NOT dst) */
optPtr = &M8BMA_NDTable;
break;
}
if (clipToRegionFlag != 0)
{ /* handle region clipping in a separate loop */
LineDrawer = &ClipAndDrawEntry;
Line_Clip_Region(rectCnt, listPtr);
nuResume(dstBmap);
return;
}
while (rectCnt-- > 0)
{ /* Main line-drawing loop. */
dRect.Xmin = listPtr->lStart.X;
dRect.Ymin = listPtr->lStart.Y;
dRect.Xmax = listPtr->lEnd.X;
dRect.Ymax = listPtr->lEnd.Y;
drawStat = (char) listPtr->flStat;
listPtr++;
ClipAndDrawEntry(); /* clip and draw the line */
}
nuResume(dstBmap);
return;
}
/* BobB 5/7/98 - moved ClipAndDrawEntry here since this file is
generic */
/* Function ClipAndDrawEntry perform trivial clipping/clipping
categorization. */
void ClipAndDrawEntry(void)
{
int mwLC(void);
lineEncode = 0; /* determine clipping category */
if (dRect.Xmin < cRect.Xmin)
{
lineEncode += 18;
}
else
{
if (dRect.Xmin > cRect.Xmax) lineEncode += 9;
}
if (dRect.Ymin < cRect.Ymin)
{
lineEncode += 27;
}
else
{
if (dRect.Ymin > cRect.Ymax) lineEncode += 54;
}
if (dRect.Xmax < cRect.Xmin)
{
lineEncode += 2;
}
else
{
if (dRect.Xmax > cRect.Xmax) lineEncode += 1;
}
if (dRect.Ymax < cRect.Ymin)
{
lineEncode += 3;
}
else
{
if (dRect.Ymax > cRect.Ymax) lineEncode += 6;
}
/* perform the clipping and set the drawing variables */
if (mwLC()) return; /* return if the line is completely clipped,
with nothing left to draw */
/* point to the row table entry for the initial row */
rowTablePtr[0] = (long *)(rowTablePtr[1] + dRect.Ymin);
optPtr(); /* vector to the low-level optimization routine */
return;
}
#define M8BMRYMLR M8BMRV
#define M8BMRXMLR M8BMRH
#define M8BMRDLR M8BMRH
#define M8BMRXMRL M8BMRDRL
#define M8BMXYMLR M8BMXV
#define M8BMXXMLR M8BMXH
#define M8BMXDLR M8BMXH
#define M8BMXXMRL M8BMXDRL
#define M8BMOYMLR M8BMOV
#define M8BMOXMLR M8BMOH
#define M8BMODLR M8BMOH
#define M8BMOXMRL M8BMODRL
#define M8BMOYMLR_ND M8BMOV_ND
#define M8BMOXMLR_ND M8BMOH_ND
#define M8BMODLR_ND M8BMOH_ND
#define M8BMOXMRL_ND M8BMODRL_ND
#define M8BMAYMLR M8BMAV
#define M8BMAXMLR M8BMAH
#define M8BMADLR M8BMAH
#define M8BMAXMRL M8BMADRL
#define M8BMAYMLR_ND M8BMAV_ND
#define M8BMAXMLR_ND M8BMAH_ND
#define M8BMADLR_ND M8BMAH_ND
#define M8BMAXMRL_ND M8BMADRL_ND
void M8BURTable(void)
{
void M8BURYMRL(void);
void M8BURV(void);
void M8BURYMLR(void);
void M8BURDLR(void);
void M8BURXMLR(void);
void M8BURH(void);
void M8BURDRL(void);
void M8BURXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BURYMRL();
break;
case 1:
M8BURV();
break;
case 2:
M8BURYMLR();
break;
case 3:
M8BURDLR();
break;
case 4:
M8BURXMLR();
break;
case 5:
M8BURH();
break;
case 6:
M8BURDRL();
break;
case 7:
M8BURXMRL();
break;
}
return;
}
void M8BMRTable(void)
{
void M8BMRYMRL(void);
void M8BMRV(void);
void M8BMRYMLR(void);
void M8BMRDLR(void);
void M8BMRXMLR(void);
void M8BMRH(void);
void M8BMRDRL(void);
void M8BMRXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BMRYMRL();
break;
case 1:
M8BMRV();
break;
case 2:
M8BMRYMLR();
break;
case 3:
M8BMRDLR();
break;
case 4:
M8BMRXMLR();
break;
case 5:
M8BMRH();
break;
case 6:
M8BMRDRL();
break;
case 7:
M8BMRXMRL();
break;
}
return;
}
void M8BMOTable(void)
{
void M8BMOYMRL(void);
void M8BMOV(void);
void M8BMOYMLR(void);
void M8BMODLR(void);
void M8BMOXMLR(void);
void M8BMOH(void);
void M8BMODRL(void);
void M8BMOXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BMOYMRL();
break;
case 1:
M8BMOV();
break;
case 2:
M8BMOYMLR();
break;
case 3:
M8BMODLR();
break;
case 4:
M8BMOXMLR();
break;
case 5:
M8BMOH();
break;
case 6:
M8BMODRL();
break;
case 7:
M8BMOXMRL();
break;
}
return;
}
void M8BUXTable(void)
{
void M8BUXYMRL(void);
void M8BUXV(void);
void M8BUXYMLR(void);
void M8BUXDLR(void);
void M8BUXXMLR(void);
void M8BUXH(void);
void M8BUXDRL(void);
void M8BUXXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BUXYMRL();
break;
case 1:
M8BUXV();
break;
case 2:
M8BUXYMLR();
break;
case 3:
M8BUXDLR();
break;
case 4:
M8BUXXMLR();
break;
case 5:
M8BUXH();
break;
case 6:
M8BUXDRL();
break;
case 7:
M8BUXXMRL();
break;
}
return;
}
void M8BMXTable(void)
{
void M8BMXYMRL(void);
void M8BMXV(void);
void M8BMXYMLR(void);
void M8BMXDLR(void);
void M8BMXXMLR(void);
void M8BMXH(void);
void M8BMXDRL(void);
void M8BMXXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BMXYMRL();
break;
case 1:
M8BMXV();
break;
case 2:
M8BMXYMLR();
break;
case 3:
M8BMXDLR();
break;
case 4:
M8BMXXMLR();
break;
case 5:
M8BMXH();
break;
case 6:
M8BMXDRL();
break;
case 7:
M8BMXXMRL();
break;
}
return;
}
void M8BMATable(void)
{
void M8BMAYMRL(void);
void M8BMAV(void);
void M8BMAYMLR(void);
void M8BMADLR(void);
void M8BMAXMLR(void);
void M8BMAH(void);
void M8BMADRL(void);
void M8BMAXMRL(void);
switch (lineDir) /* appropriate for the line direction */
{
case 0:
M8BMAYMRL();
break;
case 1:
M8BMAV();
break;
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