mirror of
https://github.com/scummvm/scummex.git
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yoshizf
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/* ScummEX - Viewer for Scumm data files
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* Copyright (C) 2003 Adrien Mercier
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* Copyright (C) 2003 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program 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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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header: /Users/sev/projects/sc/s/scummvm/scummex/scaler.cpp,v 1.1 2003/09/27 09:53:42 yoshizf Exp $
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*
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*/
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#include "scaler.h"
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void AdvMame2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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const uint32 nextlineSrc = srcPitch / sizeof(uint8);
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const uint8 *p = srcPtr;
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const uint32 nextlineDst = dstPitch / sizeof(uint8);
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uint8 *q = dstPtr;
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uint8 A, B, C;
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uint8 D, E, F;
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uint8 G, H, I;
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while (height--) {
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B = *(p - 1 - nextlineSrc);
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E = *(p - 1);
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H = *(p - 1 + nextlineSrc);
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C = *(p - nextlineSrc);
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F = *(p);
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I = *(p + nextlineSrc);
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for (int i = 0; i < width; ++i) {
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p++;
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A = B; B = C; C = *(p - nextlineSrc);
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D = E; E = F; F = *(p);
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G = H; H = I; I = *(p + nextlineSrc);
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*(q) = D == B && B != F && D != H ? D : E;
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*(q + 1) = B == F && B != D && F != H ? F : E;
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*(q + nextlineDst) = D == H && D != B && H != F ? D : E;
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*(q + nextlineDst + 1) = H == F && D != H && B != F ? F : E;
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q += 2;
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}
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p += nextlineSrc - width;
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q += (nextlineDst - width) << 1;
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}
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}
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void AdvMame3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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const uint32 nextlineSrc = srcPitch / sizeof(uint8);
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const uint8 *p = srcPtr;
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const uint32 nextlineDst = dstPitch / sizeof(uint8);
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uint8 *q = dstPtr;
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uint8 A, B, C;
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uint8 D, E, F;
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uint8 G, H, I;
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while (height--) {
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B = *(p - 1 - nextlineSrc);
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E = *(p - 1);
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H = *(p - 1 + nextlineSrc);
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C = *(p - nextlineSrc);
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F = *(p);
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I = *(p + nextlineSrc);
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for (int i = 0; i < width; ++i) {
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p++;
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A = B; B = C; C = *(p - nextlineSrc);
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D = E; E = F; F = *(p);
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G = H; H = I; I = *(p + nextlineSrc);
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*(q) = D == B && B != F && D != H ? D : E;
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*(q + 1) = E;
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*(q + 2) = B == F && B != D && F != H ? F : E;
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*(q + nextlineDst) = E;
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*(q + nextlineDst + 1) = E;
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*(q + nextlineDst + 2) = E;
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*(q + 2 * nextlineDst) = D == H && D != B && H != F ? D : E;
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*(q + 2 * nextlineDst + 1) = E;
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*(q + 2 * nextlineDst + 2) = H == F && D != H && B != F ? F : E;
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q += 3;
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}
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p += nextlineSrc - width;
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q += (nextlineDst - width) * 3;
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}
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}
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void scale(int scale, const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
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switch (scale) {
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case 2 :
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AdvMame2x(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 3 :
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AdvMame3x(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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}
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}
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