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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "graphics/scaler/intern.h"
#include "CEScaler.h"
/**
* This filter (down)scales the source image horizontally by a factor of 3/4.
* For example, a 320x200 image is scaled to 240x200.
*/
template<int bitFormat>
void PocketPCPortraitTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint16 *work;
// Various casts below go via (void *) to avoid warning. This is
// safe as these are all even addresses.
while (height--) {
work = (uint16 *)(void *)dstPtr;
for (int i=0; i<width; i+=4) {
// Work with 4 pixels
uint16 color1 = *(((const uint16 *)(const void *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)(const void *)srcPtr) + (i + 1));
uint16 color3 = *(((const uint16 *)(const void *)srcPtr) + (i + 2));
uint16 color4 = *(((const uint16 *)(const void *)srcPtr) + (i + 3));
work[0] = interpolate32_3_1<bitFormat>(color1, color2);
work[1] = interpolate32_1_1<bitFormat>(color2, color3);
work[2] = interpolate32_3_1<bitFormat>(color4, color3);
work += 3;
}
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
MAKE_WRAPPER(PocketPCPortrait)
/**
* This filter (up)scales the source image vertically by a factor of 6/5.
* For example, a 320x200 image is scaled to 320x240.
*
* The main difference to the code in graphics/scaler/aspect.cpp is the
* out-of-place operation, omitting a straight blit step the sdl backend
* does. Also, tests show unaligned access errors with the stock aspect scaler.
*/
void PocketPCLandscapeAspect(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
const int redblueMasks[] = { 0x7C1F, 0xF81F };
const int greenMasks[] = { 0x03E0, 0x07E0 };
const int RBM = redblueMasks[gBitFormat == 565];
const int GM = greenMasks[gBitFormat == 565];
int i,j;
unsigned int p1, p2;
const uint8 *inbuf, *instart;
uint8 *outbuf, *outstart;
#define RB(x) ((x & RBM)<<8)
#define G(x) ((x & GM)<<3)
#define P20(x) (((x)>>2)-((x)>>4))
#define P40(x) (((x)>>1)-((x)>>3))
#define P60(x) (((x)>>1)+((x)>>3))
#define P80(x) (((x)>>1)+((x)>>2)+((x)>>4))
#define MAKEPIXEL(rb,g) ((((rb)>>8) & RBM | ((g)>>3) & GM))
inbuf = (const uint8 *)srcPtr;
outbuf = (uint8 *)dstPtr;
height /= 5;
// Various casts below go via (void *) to avoid warning. This is
// safe as these are all even addresses.
for (i = 0; i < height; i++) {
instart = inbuf;
outstart = outbuf;
for (j=0; j < width; j++) {
p1 = *(const uint16*)(const void *)inbuf; inbuf += srcPitch;
*(uint16*)(void *)outbuf = p1; outbuf += dstPitch;
p2 = *(const uint16*)(const void *)inbuf; inbuf += srcPitch;
*(uint16*)(void *)outbuf = MAKEPIXEL(P20(RB(p1))+P80(RB(p2)),P20(G(p1))+P80(G(p2))); outbuf += dstPitch;
p1 = p2;
p2 = *(const uint16*)(const void *)inbuf; inbuf += srcPitch;
*(uint16*)(void *)outbuf = MAKEPIXEL(P40(RB(p1))+P60(RB(p2)),P40(G(p1))+P60(G(p2))); outbuf += dstPitch;
p1 = p2;
p2 = *(const uint16*)(const void *)inbuf; inbuf += srcPitch;
*(uint16*)(void *)outbuf = MAKEPIXEL(P60(RB(p1))+P40(RB(p2)),P60(G(p1))+P40(G(p2))); outbuf += dstPitch;
p1 = p2;
p2 = *(const uint16*)(const void *)inbuf;
*(uint16*)(void *)outbuf = MAKEPIXEL(P80(RB(p1))+P20(RB(p2)),P80(G(p1))+P20(G(p2))); outbuf += dstPitch;
*(uint16*)(void *)outbuf = p2;
inbuf = inbuf - srcPitch*4 + sizeof(uint16);
outbuf = outbuf - dstPitch*5 + sizeof(uint16);
}
inbuf = instart + srcPitch*5;
outbuf = outstart + dstPitch*6;
}
}
#ifdef ARM
extern "C" {
void PocketPCHalfARM(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height, int mask, int round);
void SmartphoneLandscapeARM(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height, int mask);
// Rounding constants and masks used for different pixel formats
int roundingconstants[] = { 0x00200802, 0x00201002 };
int redbluegreenMasks[] = { 0x03E07C1F, 0x07E0F81F };
}
#endif
template<int bitFormat>
void PocketPCHalfTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint8 *work;
uint16 srcPitch16 = (uint16)(srcPitch / sizeof(uint16));
while ((height -= 2) >= 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) = interpolate16_1_1_1_1<bitFormat>(color1, color2, color3, color4);
work += sizeof(uint16);
}
srcPtr += 2 * srcPitch;
dstPtr += dstPitch;
}
}
/**
* This filter (down)scales the source image by a factor of 1/2.
* For example, a 320x200 image is scaled to 160x100.
*/
void PocketPCHalf(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
#ifdef ARM
int maskUsed = (gBitFormat == 565);
PocketPCHalfARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height, redbluegreenMasks[maskUsed], roundingconstants[maskUsed]);
#else
if (gBitFormat == 565)
PocketPCHalfTemplate<565>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
else
PocketPCHalfTemplate<555>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
#endif
}
/**
* This filter (down)scales the source image horizontally by a factor of 1/2.
* For example, a 320x200 image is scaled to 160x200.
*/
template<int bitFormat>
void PocketPCHalfZoomTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint16 *work;
if (!height)
return;
// Various casts below go via (void *) to avoid warning. This is
// safe as these are all even addresses.
while (height--) {
work = (uint16 *)(void *)dstPtr;
for (int i = 0; i < width; i += 2) {
uint16 color1 = *(((const uint16 *)(const void *)srcPtr) + i);
uint16 color2 = *(((const uint16 *)(const void *)srcPtr) + (i + 1));
*work++ = interpolate32_1_1<bitFormat>(color1, color2);
}
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
MAKE_WRAPPER(PocketPCHalfZoom)
template<int bitFormat>
void SmartphoneLandscapeTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
uint8 *work;
int line = 0;
while (height--) {
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) = interpolate32_3_1<bitFormat>(color1, color2);
*(((uint16 *)work) + 1) = interpolate32_3_1<bitFormat>(color3, color2);
work += 2 * sizeof(uint16);
}
srcPtr += srcPitch;
dstPtr += dstPitch;
line++;
if (line == 7) {
line = 0;
srcPtr += srcPitch;
height--;
}
}
}
/**
* This filter (down)scales the source image horizontally by a factor of 2/3
* and vertically by 7/8. For example, a 320x200 image is scaled to 213x175.
*
* @note The ARM asm version seems to work differently ?!? It apparently scales
* horizontally by 11/16. Thus a 320x200 image is scaled to 220x175.
*/
void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
#ifdef ARM
int maskUsed = (gBitFormat == 565);
SmartphoneLandscapeARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height, redbluegreenMasks[maskUsed]);
#else
if (gBitFormat == 565)
SmartphoneLandscapeTemplate<565>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
else
SmartphoneLandscapeTemplate<555>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
#endif
}
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