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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2004 The ScummVM project
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "CEScaler.h"
template<int bitFormat, int w1, int w2, int w3, int w4>
static inline uint16 interpolate16_4(uint16 p1, uint16 p2, uint16 p3, uint16 p4)
{
return ((((p1 & redblueMask) * w1 + (p2 & redblueMask) * w2 + (p3 & redblueMask) * w3 + (p4 & redblueMask) * w4) / (w1 + w2 + w3 + w4)) & redblueMask) |
((((p1 & greenMask) * w1 + (p2 & greenMask) * w2 + (p3 & greenMask) * w3 + (p4 & greenMask) * w4) / (w1 + w2 + w3 + w4)) & greenMask);
}
void PocketPCPortrait(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *work;
int i;
while (height--) {
i = 0;
work = dstPtr;
for (int i=0; i<width; i+=4) {
// Work with 4 pixels
uint16 color1 = *(((const uint16 *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)srcPtr) + (i + 1));
uint16 color3 = *(((const uint16 *)srcPtr) + (i + 2));
uint16 color4 = *(((const uint16 *)srcPtr) + (i + 3));
if (gBitFormat == 565) {
*(((uint16 *)work) + 0) = interpolate16_2<565, 3, 1>(color1, color2);
*(((uint16 *)work) + 1) = interpolate16_2<565, 1, 1>(color2, color3);
*(((uint16 *)work) + 2) = interpolate16_2<565, 1, 3>(color3, color4);
}
else {
*(((uint16 *)work) + 0) = interpolate16_2<555, 3, 1>(color1, color2);
*(((uint16 *)work) + 1) = interpolate16_2<555, 1, 1>(color2, color3);
*(((uint16 *)work) + 2) = interpolate16_2<555, 1, 3>(color3, color4);
}
work += 3 * sizeof(uint16);
}
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
void PocketPCHalf(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *work;
int i;
uint16 srcPitch16 = (uint16)(srcPitch / sizeof(uint16));
while ((height-=2) >= 0) {
i = 0;
work = dstPtr;
for (int i=0; i<width; i+=2) {
// Another lame filter attempt :)
uint16 color1 = *(((const uint16 *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)srcPtr) + (i + 1));
uint16 color3 = *(((const uint16 *)srcPtr) + (i + srcPitch16));
uint16 color4 = *(((const uint16 *)srcPtr) + (i + srcPitch16 + 1));
if (gBitFormat == 565)
*(((uint16 *)work) + 0) = interpolate16_4<565, 1, 1, 1, 1>(color1, color2, color3, color4);
else
*(((uint16 *)work) + 0) = interpolate16_4<555, 1, 1, 1, 1>(color1, color2, color3, color4);
work += sizeof(uint16);
}
srcPtr += 2 * srcPitch;
dstPtr += dstPitch;
}
}
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