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/* REminiscence - Flashback interpreter
* Copyright (C) 2005-2011 Gregory Montoir
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "scaler.h"
const Scaler _scalers[] = {
{ "point1x", &point1x, 1 },
{ "point2x", &point2x, 2 },
{ "scale2x", &scale2x, 2 },
{ "point3x", &point3x, 3 },
{ "scale3x", &scale3x, 3 }
};
void point1x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
dstPitch >>= 1;
while (h--) {
memcpy(dst, src, w * 2);
dst += dstPitch;
src += srcPitch;
}
}
void point2x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
dstPitch >>= 1;
while (h--) {
uint16 *p = dst;
for (int i = 0; i < w; ++i, p += 2) {
uint16 c = *(src + i);
*(p) = c;
*(p + 1) = c;
*(p + dstPitch) = c;
*(p + dstPitch + 1) = c;
}
dst += dstPitch * 2;
src += srcPitch;
}
}
void point3x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
dstPitch >>= 1;
while (h--) {
uint16 *p = dst;
for (int i = 0; i < w; ++i, p += 3) {
uint16 c = *(src + i);
*(p) = c;
*(p + 1) = c;
*(p + 2) = c;
*(p + dstPitch) = c;
*(p + dstPitch + 1) = c;
*(p + dstPitch + 2) = c;
*(p + 2 * dstPitch) = c;
*(p + 2 * dstPitch + 1) = c;
*(p + 2 * dstPitch + 2) = c;
}
dst += dstPitch * 3;
src += srcPitch;
}
}
void scale2x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
dstPitch >>= 1;
while (h--) {
uint16 *p = dst;
for (int i = 0; i < w; ++i, p += 2) {
uint16 B = *(src + i - srcPitch);
uint16 D = *(src + i - 1);
uint16 E = *(src + i);
uint16 F = *(src + i + 1);
uint16 H = *(src + i + srcPitch);
if (B != H && D != F) {
*(p) = D == B ? D : E;
*(p + 1) = B == F ? F : E;
*(p + dstPitch) = D == H ? D : E;
*(p + dstPitch + 1) = H == F ? F : E;
} else {
*(p) = E;
*(p + 1) = E;
*(p + dstPitch) = E;
*(p + dstPitch + 1) = E;
}
}
dst += dstPitch * 2;
src += srcPitch;
}
}
void scale3x(uint16 *dst, uint16 dstPitch, const uint16 *src, uint16 srcPitch, uint16 w, uint16 h) {
dstPitch >>= 1;
while (h--) {
uint16 *p = dst;
for (int i = 0; i < w; ++i, p += 3) {
uint16 A = *(src + i - srcPitch - 1);
uint16 B = *(src + i - srcPitch);
uint16 C = *(src + i - srcPitch + 1);
uint16 D = *(src + i - 1);
uint16 E = *(src + i);
uint16 F = *(src + i + 1);
uint16 G = *(src + i + srcPitch - 1);
uint16 H = *(src + i + srcPitch);
uint16 I = *(src + i + srcPitch + 1);
if (B != H && D != F) {
*(p) = D == B ? D : E;
*(p + 1) = (D == B && E != C) || (B == F && E != A) ? B : E;
*(p + 2) = B == F ? F : E;
*(p + dstPitch) = (D == B && E != G) || (D == B && E != A) ? D : E;
*(p + dstPitch + 1) = E;
*(p + dstPitch + 2) = (B == F && E != I) || (H == F && E != C) ? F : E;
*(p + 2 * dstPitch) = D == H ? D : E;
*(p + 2 * dstPitch + 1) = (D == H && E != I) || (H == F && E != G) ? H : E;
*(p + 2 * dstPitch + 2) = H == F ? F : E;
} else {
*(p) = E;
*(p + 1) = E;
*(p + 2) = E;
*(p + dstPitch) = E;
*(p + dstPitch + 1) = E;
*(p + dstPitch + 2) = E;
*(p + 2 * dstPitch) = E;
*(p + 2 * dstPitch + 1) = E;
*(p + 2 * dstPitch + 2) = E;
}
}
dst += dstPitch * 3;
src += srcPitch;
}
}
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