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