143 lines
3.9 KiB
C++
143 lines
3.9 KiB
C++
/* REminiscence - Flashback interpreter
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* Copyright (C) 2005-2007 Gregory Montoir
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "scaler.h"
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const Scaler _scalers[] = {
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{ "point1x", &point1x, 1 },
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{ "point2x", &point2x, 2 },
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{ "scale2x", &scale2x, 2 },
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{ "point3x", &point3x, 3 },
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{ "scale3x", &scale3x, 3 }
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};
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void point1x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
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dstPitch >>= 1;
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while (h--) {
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memcpy(dst, src, w * 2);
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dst += dstPitch;
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src += srcPitch;
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}
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}
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void point2x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
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dstPitch >>= 1;
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while (h--) {
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uint16 *p = dst;
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for (int i = 0; i < w; ++i, p += 2) {
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uint16 c = *(src + i);
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*(p) = c;
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*(p + 1) = c;
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*(p + dstPitch) = c;
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*(p + dstPitch + 1) = c;
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}
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dst += dstPitch * 2;
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src += srcPitch;
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}
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}
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void point3x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
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dstPitch >>= 1;
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while (h--) {
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uint16 *p = dst;
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for (int i = 0; i < w; ++i, p += 3) {
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uint16 c = *(src + i);
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*(p) = c;
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*(p + 1) = c;
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*(p + 2) = c;
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*(p + dstPitch) = c;
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*(p + dstPitch + 1) = c;
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*(p + dstPitch + 2) = c;
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*(p + 2 * dstPitch) = c;
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*(p + 2 * dstPitch + 1) = c;
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*(p + 2 * dstPitch + 2) = c;
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}
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dst += dstPitch * 3;
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src += srcPitch;
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}
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}
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void scale2x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
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dstPitch >>= 1;
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while (h--) {
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uint16 *p = dst;
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for (int i = 0; i < w; ++i, p += 2) {
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uint16 B = *(src + i - srcPitch);
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uint16 D = *(src + i - 1);
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uint16 E = *(src + i);
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uint16 F = *(src + i + 1);
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uint16 H = *(src + i + srcPitch);
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if (B != H && D != F) {
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*(p) = D == B ? D : E;
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*(p + 1) = B == F ? F : E;
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*(p + dstPitch) = D == H ? D : E;
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*(p + dstPitch + 1) = H == F ? F : E;
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} else {
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*(p) = E;
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*(p + 1) = E;
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*(p + dstPitch) = E;
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*(p + dstPitch + 1) = E;
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}
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}
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dst += dstPitch * 2;
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src += srcPitch;
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}
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}
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void scale3x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
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dstPitch >>= 1;
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while (h--) {
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uint16 *p = dst;
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for (int i = 0; i < w; ++i, p += 3) {
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uint16 A = *(src + i - srcPitch - 1);
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uint16 B = *(src + i - srcPitch);
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uint16 C = *(src + i - srcPitch + 1);
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uint16 D = *(src + i - 1);
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uint16 E = *(src + i);
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uint16 F = *(src + i + 1);
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uint16 G = *(src + i + srcPitch - 1);
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uint16 H = *(src + i + srcPitch);
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uint16 I = *(src + i + srcPitch + 1);
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if (B != H && D != F) {
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*(p) = D == B ? D : E;
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*(p + 1) = (D == B && E != C) || (B == F && E != A) ? B : E;
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*(p + 2) = B == F ? F : E;
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*(p + dstPitch) = (D == B && E != G) || (D == B && E != A) ? D : E;
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*(p + dstPitch + 1) = E;
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*(p + dstPitch + 2) = (B == F && E != I) || (H == F && E != C) ? F : E;
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*(p + 2 * dstPitch) = D == H ? D : E;
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*(p + 2 * dstPitch + 1) = (D == H && E != I) || (H == F && E != G) ? H : E;
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*(p + 2 * dstPitch + 2) = H == F ? F : E;
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} else {
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*(p) = E;
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*(p + 1) = E;
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*(p + 2) = E;
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*(p + dstPitch) = E;
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*(p + dstPitch + 1) = E;
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*(p + dstPitch + 2) = E;
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*(p + 2 * dstPitch) = E;
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*(p + 2 * dstPitch + 1) = E;
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*(p + 2 * dstPitch + 2) = E;
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}
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}
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dst += dstPitch * 3;
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src += srcPitch;
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}
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}
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