mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-06-28 15:16:11 +02:00
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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* Copyright (C) 2002-2019 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* The HQ3x high quality 3x graphics filter.
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* Original author Maxim Stepin (see http://www.hiend3d.com/hq3x.html).
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* Adapted for DOSBox from ScummVM and HiEnd3D code by Kronuz.
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*/
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#include <stdlib.h>
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#ifndef RENDER_TEMPLATES_HQNX_TABLE_H
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#define RENDER_TEMPLATES_HQNX_TABLE_H
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static Bit32u *_RGBtoYUV = 0;
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static inline bool diffYUV(Bit32u yuv1, Bit32u yuv2)
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{
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static const Bit32u Ymask = 0x00FF0000;
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static const Bit32u Umask = 0x0000FF00;
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static const Bit32u Vmask = 0x000000FF;
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static const Bit32u trY = 0x00300000;
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static const Bit32u trU = 0x00000700;
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static const Bit32u trV = 0x00000006;
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Bit32u diff;
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Bit32u mask;
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diff = ((yuv1 & Ymask) - (yuv2 & Ymask));
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mask = ((Bit32s)diff) >> 31; // ~1/-1 if value < 0, 0 otherwise
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diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
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if (diff > trY) return true;
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diff = ((yuv1 & Umask) - (yuv2 & Umask));
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mask = ((Bit32s)diff)>> 31; // ~1/-1 if value < 0, 0 otherwise
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diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
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if (diff > trU) return true;
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diff = ((yuv1 & Vmask) - (yuv2 & Vmask));
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mask = ((Bit32s)diff) >> 31; // ~1/-1 if value < 0, 0 otherwise
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diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
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if (diff > trV) return true;
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return false;
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}
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#endif
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static inline void conc2d(InitLUTs,SBPP)(void)
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{
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int r, g, b;
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int Y, u, v;
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_RGBtoYUV = (Bit32u *)malloc(65536 * sizeof(Bit32u));
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for (int color = 0; color < 65536; ++color) {
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#if SBPP == 32
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r = ((color & 0xF800) >> 11) << (8 - 5);
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g = ((color & 0x07E0) >> 5) << (8 - 6);
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b = ((color & 0x001F) >> 0) << (8 - 5);
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#else
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r = ((color & redMask) >> redShift) << (8 - redBits);
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g = ((color & greenMask) >> greenShift) << (8 - greenBits);
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b = ((color & blueMask) >> blueShift) << (8 - blueBits);
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#endif
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Y = (r + g + b) >> 2;
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u = 128 + ((r - b) >> 2);
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v = 128 + ((-r + 2 * g - b) >> 3);
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_RGBtoYUV[color] = (Y << 16) | (u << 8) | v;
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}
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}
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