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https://github.com/libretro/scummvm.git
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93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "graphics/scaler/intern.h"
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#include "CEScaler.h"
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extern int gBitFormat;
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#ifdef ARM
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extern "C" {
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void SmartphoneLandscapeARM(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height, int mask);
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}
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void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
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// Rounding constants and masks used for different pixel formats
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static const int redbluegreenMasks[] = { 0x03E07C1F, 0x07E0F81F };
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const int maskUsed = (gBitFormat == 565);
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SmartphoneLandscapeARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height, redbluegreenMasks[maskUsed]);
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}
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#else
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template<typename ColorMask>
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void SmartphoneLandscapeTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
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int line = 0;
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assert((width % 16) == 0);
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while (height--) {
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uint16 *d = (uint16 *)dstPtr;
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const uint16 *s = (const uint16 *)srcPtr;
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for (int i = 0; i < width; i += 16) {
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// Downscale horizontally to 11/16.
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// See smartLandScale.s for an explanation of the scale pattern.
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*d++ = interpolate32_3_1<ColorMask>(s[0], s[1]);
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*d++ = interpolate32_1_1<ColorMask>(s[1], s[2]);
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*d++ = interpolate32_3_1<ColorMask>(s[3], s[2]);
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*d++ = interpolate32_1_1<ColorMask>(s[4], s[5]);
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*d++ = interpolate32_3_1<ColorMask>(s[6], s[7]);
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*d++ = interpolate32_1_1<ColorMask>(s[7], s[8]);
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*d++ = interpolate32_3_1<ColorMask>(s[9], s[8]);
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*d++ = interpolate32_1_1<ColorMask>(s[10], s[11]);
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*d++ = interpolate32_3_1<ColorMask>(s[12], s[13]);
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*d++ = interpolate32_1_1<ColorMask>(s[13], s[14]);
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*d++ = interpolate32_3_1<ColorMask>(s[15], s[14]);
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s += 16;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch;
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line++;
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// Skip every 8th row
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if (line == 7) {
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line = 0;
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srcPtr += srcPitch;
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height--;
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}
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}
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}
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void SmartphoneLandscape(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) {
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if (gBitFormat == 565)
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SmartphoneLandscapeTemplate<Graphics::ColorMasks<565> >(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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else
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SmartphoneLandscapeTemplate<Graphics::ColorMasks<555> >(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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}
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#endif
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