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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.
*
*/
#include "graphics/scaler/intern.h"
#include "CEScaler.h"
extern int gBitFormat;
#ifdef ARM
extern "C" {
void SmartphoneLandscapeARM(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height, int mask);
}
void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
// Rounding constants and masks used for different pixel formats
static const int redbluegreenMasks[] = { 0x03E07C1F, 0x07E0F81F };
const int maskUsed = (gBitFormat == 565);
SmartphoneLandscapeARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height, redbluegreenMasks[maskUsed]);
}
#else
template<typename ColorMask>
void SmartphoneLandscapeTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
int line = 0;
assert((width % 16) == 0);
while (height--) {
uint16 *d = (uint16 *)dstPtr;
const uint16 *s = (const uint16 *)srcPtr;
for (int i = 0; i < width; i += 16) {
// Downscale horizontally to 11/16.
// See smartLandScale.s for an explanation of the scale pattern.
*d++ = interpolate32_3_1<ColorMask>(s[0], s[1]);
*d++ = interpolate32_1_1<ColorMask>(s[1], s[2]);
*d++ = interpolate32_3_1<ColorMask>(s[3], s[2]);
*d++ = interpolate32_1_1<ColorMask>(s[4], s[5]);
*d++ = interpolate32_3_1<ColorMask>(s[6], s[7]);
*d++ = interpolate32_1_1<ColorMask>(s[7], s[8]);
*d++ = interpolate32_3_1<ColorMask>(s[9], s[8]);
*d++ = interpolate32_1_1<ColorMask>(s[10], s[11]);
*d++ = interpolate32_3_1<ColorMask>(s[12], s[13]);
*d++ = interpolate32_1_1<ColorMask>(s[13], s[14]);
*d++ = interpolate32_3_1<ColorMask>(s[15], s[14]);
s += 16;
}
srcPtr += srcPitch;
dstPtr += dstPitch;
line++;
// Skip every 8th row
if (line == 7) {
line = 0;
srcPtr += srcPitch;
height--;
}
}
}
void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
if (gBitFormat == 565)
SmartphoneLandscapeTemplate<Graphics::ColorMasks<565> >(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
else
SmartphoneLandscapeTemplate<Graphics::ColorMasks<555> >(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
}
#endif
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