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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"
int redblueMasks[] = { 0x7C1F, 0xF81F };
int greenMasks[] = { 0x03E0, 0x07E0 };
static int maskUsed;
void initCEScaler(void) {
if (gBitFormat == 555)
maskUsed = 0;
else
maskUsed = 1;
}
static inline uint16 CEinterpolate16_4(uint16 p1, uint16 p2, uint16 p3, uint16 p4)
{
return ((((p1 & redblueMasks[maskUsed]) + (p2 & redblueMasks[maskUsed]) + (p3 & redblueMasks[maskUsed]) + (p4 & redblueMasks[maskUsed])) / 4) & redblueMasks[maskUsed]) |
((((p1 & greenMasks[maskUsed]) + (p2 & greenMasks[maskUsed]) + (p3 & greenMasks[maskUsed]) + (p4 & greenMasks[maskUsed])) / 4) & greenMasks[maskUsed]);
}
static inline uint16 CEinterpolate16_2(uint16 p1, int w1, uint16 p2, int w2) {
return ((((p1 & redblueMasks[maskUsed]) * w1 + (p2 & redblueMasks[maskUsed]) * w2) / (w1 + w2)) & redblueMasks[maskUsed]) |
((((p1 & greenMasks[maskUsed]) * w1 + (p2 & greenMasks[maskUsed]) * w2) / (w1 + w2)) & greenMasks[maskUsed]);
}
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));
*(((uint16 *)work) + 0) = CEinterpolate16_2(color1, 3, color2, 1);
*(((uint16 *)work) + 1) = CEinterpolate16_2(color2, 1, color3, 1);
*(((uint16 *)work) + 2) = CEinterpolate16_2(color3, 1, color4, 3);
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));
*(((uint16 *)work) + 0) = CEinterpolate16_4(color1, color2, color3, color4);
work += sizeof(uint16);
}
srcPtr += 2 * srcPitch;
dstPtr += dstPitch;
}
}
void PocketPCHalfZoom(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint8 *work;
int i;
uint16 srcPitch16 = (uint16)(srcPitch / sizeof(uint16));
if (!height)
return;
while (height--) {
i = 0;
work = dstPtr;
for (int i=0; i<width; i+=2) {
uint16 color1 = *(((const uint16 *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)srcPtr) + (i + 1));
*(((uint16 *)work) + 0) = CEinterpolate16_2(color1, 1, color2, 1);
work += sizeof(uint16);
}
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
#ifdef WIN32_PLATFORM_WFSP
void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint8 *work;
int i;
int line = 0;
while (height--) {
i = 0;
work = dstPtr;
for (int i=0; i<width; i+=3) {
// Filter 2/3
uint16 color1 = *(((const uint16 *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)srcPtr) + (i + 1));
uint16 color3 = *(((const uint16 *)srcPtr) + (i + 2));
*(((uint16 *)work) + 0) = CEinterpolate16_2(color1, 3, color2, 1);
*(((uint16 *)work) + 1) = CEinterpolate16_2(color2, 1, color3, 1);
work += 2 * sizeof(uint16);
}
srcPtr += srcPitch;
dstPtr += dstPitch;
line++;
if (line == 7) {
line = 0;
srcPtr += srcPitch;
height--;
}
}
}
#endif
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