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https://github.com/zydeco/minivmac4ios.git
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162 lines
3.3 KiB
C
162 lines
3.3 KiB
C
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/*
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SCRNTRNS.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 TRaNSlater
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*/
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/* required arguments for this template */
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#ifndef ScrnTrns_DoTrans /* procedure to be created by this template */
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#error "ScrnTrns_DoTrans not defined"
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#endif
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#ifndef ScrnTrns_Src
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#error "ScrnTrns_Src not defined"
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#endif
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#ifndef ScrnTrns_Dst
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#error "ScrnTrns_Dst not defined"
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#endif
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#ifndef ScrnTrns_SrcDepth
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#error "ScrnTrns_SrcDepth not defined"
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#endif
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#ifndef ScrnTrns_DstDepth
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#error "ScrnTrns_DstDepth not defined"
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#endif
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/* optional argument for this template */
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#ifndef ScrnTrns_Scale
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#define ScrnTrns_Scale 1
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#endif
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#ifndef ScrnTrns_DstZLo
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#define ScrnTrns_DstZLo 0
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#endif
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/* check of parameters */
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#if (ScrnTrns_SrcDepth < 4)
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#error "bad ScrnTrns_SrcDepth"
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#endif
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#if (ScrnTrns_DstDepth < 4)
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#error "bad ScrnTrns_Dst"
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#endif
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/* now define the procedure */
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LOCALPROC ScrnTrns_DoTrans(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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ui5b t0;
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ui5b t1;
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ui4r jn = right - left;
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ui4r SrcSkip = vMacScreenByteWidth
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- (jn << (ScrnTrns_SrcDepth - 3));
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ui3b *pSrc = ((ui3b *)ScrnTrns_Src)
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+ (left << (ScrnTrns_SrcDepth - 3))
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+ vMacScreenByteWidth * (ui5r)top;
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ui5b *pDst = ((ui5b *)ScrnTrns_Dst)
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+ left * ScrnTrns_Scale
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+ (ui5r)vMacScreenWidth * ScrnTrns_Scale * ScrnTrns_Scale * top;
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ui4r DstSkip = (vMacScreenWidth - jn) * ScrnTrns_Scale;
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#if ScrnTrns_Scale > 1
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int k;
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ui5b *p3;
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ui5b *p4;
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#endif
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for (i = bottom - top; --i >= 0; ) {
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#if ScrnTrns_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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#if 4 == ScrnTrns_SrcDepth
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t0 = do_get_mem_word(pSrc);
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pSrc += 2;
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t1 =
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#if ScrnTrns_DstZLo
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((t0 & 0x7C00) << 17) |
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((t0 & 0x7000) << 12) |
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((t0 & 0x03E0) << 14) |
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((t0 & 0x0380) << 9) |
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((t0 & 0x001F) << 11) |
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((t0 & 0x001C) << 6);
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#else
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((t0 & 0x7C00) << 9) |
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((t0 & 0x7000) << 4) |
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((t0 & 0x03E0) << 6) |
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((t0 & 0x0380) << 1) |
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((t0 & 0x001F) << 3) |
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((t0 & 0x001C) >> 2);
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#endif
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#if 0
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((t0 & 0x7C00) << 1) |
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((t0 & 0x7000) >> 4) |
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((t0 & 0x03E0) << 14) |
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((t0 & 0x0380) << 9) |
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((t0 & 0x001F) << 27) |
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((t0 & 0x001C) << 22);
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#endif
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#elif 5 == ScrnTrns_SrcDepth
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t0 = do_get_mem_long(pSrc);
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pSrc += 4;
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#if ScrnTrns_DstZLo
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t1 = t0 << 8;
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#else
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t1 = t0;
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#endif
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#endif
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#if ScrnTrns_Scale > 1
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for (k = ScrnTrns_Scale; --k >= 0; )
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#endif
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{
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*pDst++ = t1;
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}
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}
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pSrc += SrcSkip;
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pDst += DstSkip;
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#if ScrnTrns_Scale > 1
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#if ScrnTrns_Scale > 2
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for (k = ScrnTrns_Scale - 1; --k >= 0; )
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#endif
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{
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p4 = p3;
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for (j = ScrnTrns_Scale * jn; --j >= 0; ) {
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*pDst++ = *p4++;
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}
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pDst += DstSkip;
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}
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#endif /* ScrnTrns_Scale > 1 */
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}
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}
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/* undefine template locals and parameters */
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#undef ScrnTrns_DoTrans
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#undef ScrnTrns_Src
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#undef ScrnTrns_Dst
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#undef ScrnTrns_SrcDepth
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#undef ScrnTrns_DstDepth
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#undef ScrnTrns_Scale
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#undef ScrnTrns_DstZLo
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