1 line
3.6 KiB
C
1 line
3.6 KiB
C
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/*
SCRNMAPR.h
Copyright (C) 2012 Paul C. Pratt
You can redistribute this file and/or modify it under the terms
of version 2 of the GNU General Public License as published by
the Free Software Foundation. You should have received a copy
of the license along with this file; see the file COPYING.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
license for more details.
*/
/*
SCReeN MAPpeR
*/
/* required arguments for this template */
#ifndef ScrnMapr_DoMap /* procedure to be created by this template */
#error "ScrnMapr_DoMap not defined"
#endif
#ifndef ScrnMapr_Src
#error "ScrnMapr_Src not defined"
#endif
#ifndef ScrnMapr_Dst
#error "ScrnMapr_Dst not defined"
#endif
#ifndef ScrnMapr_SrcDepth
#error "ScrnMapr_SrcDepth not defined"
#endif
#ifndef ScrnMapr_DstDepth
#error "ScrnMapr_DstDepth not defined"
#endif
#ifndef ScrnMapr_Map
#error "ScrnMapr_Map not defined"
#endif
/* optional argument for this template */
#ifndef ScrnMapr_Scale
#define ScrnMapr_Scale 1
#endif
/* check of parameters */
#if (ScrnMapr_SrcDepth < 0) || (ScrnMapr_SrcDepth > 3)
#error "bad ScrnMapr_SrcDepth"
#endif
#if (ScrnMapr_DstDepth < ScrnMapr_SrcDepth)
#error "bad ScrnMapr_Dst"
#endif
/* calculate a few things local to this template */
#define ScrnMapr_MapElSz \
(ScrnMapr_Scale << (ScrnMapr_DstDepth - ScrnMapr_SrcDepth))
#if 0 == (ScrnMapr_MapElSz & 3)
#define ScrnMapr_TranT ui5b
#define ScrnMapr_TranLn2Sz 2
#elif 0 == (ScrnMapr_MapElSz & 1)
#define ScrnMapr_TranT ui4b
#define ScrnMapr_TranLn2Sz 1
#else
#define ScrnMapr_TranT ui3b
#define ScrnMapr_TranLn2Sz 0
#endif
#define ScrnMapr_TranN (ScrnMapr_MapElSz >> ScrnMapr_TranLn2Sz)
#define ScrnMapr_ScrnWB (vMacScreenWidth >> (3 - ScrnMapr_SrcDepth))
/* now define the procedure */
LOCALPROC ScrnMapr_DoMap(si4b top, si4b left,
si4b bottom, si4b right)
{
int i;
int j;
#if (ScrnMapr_TranN > 4) || (ScrnMapr_Scale > 2)
int k;
#endif
ui5r t0;
ScrnMapr_TranT *pMap;
#if ScrnMapr_Scale > 1
ScrnMapr_TranT *p3;
#endif
ui4r leftB = left >> (3 - ScrnMapr_SrcDepth);
ui4r rightB = (right + (1 << (3 - ScrnMapr_SrcDepth)) - 1)
>> (3 - ScrnMapr_SrcDepth);
ui4r jn = rightB - leftB;
ui4r SrcSkip = ScrnMapr_ScrnWB - jn;
ui3b *pSrc = ((ui3b *)ScrnMapr_Src)
+ leftB + ScrnMapr_ScrnWB * (ui5r)top;
ScrnMapr_TranT *pDst = ((ScrnMapr_TranT *)ScrnMapr_Dst)
+ ((leftB + ScrnMapr_ScrnWB * ScrnMapr_Scale * (ui5r)top)
* ScrnMapr_TranN);
ui5r DstSkip = SrcSkip * ScrnMapr_TranN;
for (i = bottom - top; --i >= 0; ) {
#if ScrnMapr_Scale > 1
p3 = pDst;
#endif
for (j = jn; --j >= 0; ) {
t0 = *pSrc++;
pMap =
&((ScrnMapr_TranT *)ScrnMapr_Map)[t0 * ScrnMapr_TranN];
#if ScrnMapr_TranN > 4
for (k = ScrnMapr_TranN; --k >= 0; ) {
*pDst++ = *pMap++;
}
#else
#if ScrnMapr_TranN >= 2
*pDst++ = *pMap++;
#endif
#if ScrnMapr_TranN >= 3
*pDst++ = *pMap++;
#endif
#if ScrnMapr_TranN >= 4
*pDst++ = *pMap++;
#endif
*pDst++ = *pMap;
#endif /* ! ScrnMapr_TranN > 4 */
}
pSrc += SrcSkip;
pDst += DstSkip;
#if ScrnMapr_Scale > 1
#if ScrnMapr_Scale > 2
for (k = ScrnMapr_Scale - 1; --k >= 0; )
#endif
{
pMap = p3;
for (j = ScrnMapr_TranN * jn; --j >= 0; ) {
*pDst++ = *pMap++;
}
pDst += DstSkip;
}
#endif /* ScrnMapr_Scale > 1 */
}
}
/* undefine template locals and parameters */
#undef ScrnMapr_ScrnWB
#undef ScrnMapr_TranN
#undef ScrnMapr_TranLn2Sz
#undef ScrnMapr_TranT
#undef ScrnMapr_MapElSz
#undef ScrnMapr_DoMap
#undef ScrnMapr_Src
#undef ScrnMapr_Dst
#undef ScrnMapr_SrcDepth
#undef ScrnMapr_DstDepth
#undef ScrnMapr_Map
#undef ScrnMapr_Scale
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