mirror of
https://github.com/dborth/vbagx.git
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303 lines
10 KiB
C
303 lines
10 KiB
C
/*
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* This file is part of the Advance project.
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*
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* Copyright (C) 2003 Andrea Mazzoleni
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* In addition, as a special exception, Andrea Mazzoleni
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* gives permission to link the code of this program with
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* the MAME library (or with modified versions of MAME that use the
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* same license as MAME), and distribute linked combinations including
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* the two. You must obey the GNU General Public License in all
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* respects for all of the code used other than MAME. If you modify
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* this file, you may extend this exception to your version of the
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* file, but you are not obligated to do so. If you do not wish to
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* do so, delete this exception statement from your version.
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*/
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#ifndef __INTERP_H
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#define __INTERP_H
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#define __STDC_CONSTANT_MACROS
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#include <stdint.h>
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typedef uint16_t interp_uint16;
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typedef uint32_t interp_uint32;
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/***************************************************************************/
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/* Basic types */
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/***************************************************************************/
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/* interpolation */
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static unsigned interp_mask[2];
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static unsigned interp_bits_per_pixel;
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#define INTERP_16_MASK_1(v) (v & interp_mask[0])
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#define INTERP_16_MASK_2(v) (v & interp_mask[1])
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static inline u16 interp_16_521(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*5 + INTERP_16_MASK_1(p2)*2 + INTERP_16_MASK_1(p3)*1) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*5 + INTERP_16_MASK_2(p2)*2 + INTERP_16_MASK_2(p3)*1) / 8);
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}
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static inline u16 interp_16_332(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*3 + INTERP_16_MASK_1(p2)*3 + INTERP_16_MASK_1(p3)*2) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*3 + INTERP_16_MASK_2(p2)*3 + INTERP_16_MASK_2(p3)*2) / 8);
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}
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static inline u16 interp_16_611(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*6 + INTERP_16_MASK_1(p2) + INTERP_16_MASK_1(p3)) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*6 + INTERP_16_MASK_2(p2) + INTERP_16_MASK_2(p3)) / 8);
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}
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static inline u16 interp_16_71(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*7 + INTERP_16_MASK_1(p2)) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*7 + INTERP_16_MASK_2(p2)) / 8);
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}
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static inline u16 interp_16_211(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*2 + INTERP_16_MASK_1(p2) + INTERP_16_MASK_1(p3)) / 4)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*2 + INTERP_16_MASK_2(p2) + INTERP_16_MASK_2(p3)) / 4);
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}
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static inline u16 interp_16_772(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1(((INTERP_16_MASK_1(p1) + INTERP_16_MASK_1(p2))*7 + INTERP_16_MASK_1(p3)*2) / 16)
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| INTERP_16_MASK_2(((INTERP_16_MASK_2(p1) + INTERP_16_MASK_2(p2))*7 + INTERP_16_MASK_2(p3)*2) / 16);
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}
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static inline u16 interp_16_11(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1) + INTERP_16_MASK_1(p2)) / 2)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1) + INTERP_16_MASK_2(p2)) / 2);
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}
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static inline u16 interp_16_31(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*3 + INTERP_16_MASK_1(p2)) / 4)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*3 + INTERP_16_MASK_2(p2)) / 4);
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}
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static inline u16 interp_16_1411(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*14 + INTERP_16_MASK_1(p2) + INTERP_16_MASK_1(p3)) / 16)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*14 + INTERP_16_MASK_2(p2) + INTERP_16_MASK_2(p3)) / 16);
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}
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static inline u16 interp_16_431(u16 p1, u16 p2, u16 p3)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*4 + INTERP_16_MASK_1(p2)*3 + INTERP_16_MASK_1(p3)) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*4 + INTERP_16_MASK_2(p2)*3 + INTERP_16_MASK_2(p3)) / 8);
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}
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static inline u16 interp_16_53(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*5 + INTERP_16_MASK_1(p2)*3) / 8)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*5 + INTERP_16_MASK_2(p2)*3) / 8);
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}
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static inline u16 interp_16_151(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*15 + INTERP_16_MASK_1(p2)) / 16)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*15 + INTERP_16_MASK_2(p2)) / 16);
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}
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static inline u16 interp_16_97(u16 p1, u16 p2)
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{
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return INTERP_16_MASK_1((INTERP_16_MASK_1(p1)*9 + INTERP_16_MASK_1(p2)*7) / 16)
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| INTERP_16_MASK_2((INTERP_16_MASK_2(p1)*9 + INTERP_16_MASK_2(p2)*7) / 16);
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}
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#define INTERP_32_MASK_1(v) (v & 0xFF00FF)
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#define INTERP_32_MASK_2(v) (v & 0x00FF00)
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static inline u32 interp_32_521(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*5 + INTERP_32_MASK_1(p2)*2 + INTERP_32_MASK_1(p3)*1) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*5 + INTERP_32_MASK_2(p2)*2 + INTERP_32_MASK_2(p3)*1) / 8);
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}
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static inline u32 interp_32_332(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*3 + INTERP_32_MASK_1(p2)*3 + INTERP_32_MASK_1(p3)*2) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*3 + INTERP_32_MASK_2(p2)*3 + INTERP_32_MASK_2(p3)*2) / 8);
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}
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static inline u32 interp_32_211(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*2 + INTERP_32_MASK_1(p2) + INTERP_32_MASK_1(p3)) / 4)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*2 + INTERP_32_MASK_2(p2) + INTERP_32_MASK_2(p3)) / 4);
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}
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static inline u32 interp_32_611(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*6 + INTERP_32_MASK_1(p2) + INTERP_32_MASK_1(p3)) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*6 + INTERP_32_MASK_2(p2) + INTERP_32_MASK_2(p3)) / 8);
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}
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static inline u32 interp_32_71(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*7 + INTERP_32_MASK_1(p2)) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*7 + INTERP_32_MASK_2(p2)) / 8);
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}
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static inline u32 interp_32_772(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1(((INTERP_32_MASK_1(p1) + INTERP_32_MASK_1(p2))*7 + INTERP_32_MASK_1(p3)*2) / 16)
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| INTERP_32_MASK_2(((INTERP_32_MASK_2(p1) + INTERP_32_MASK_2(p2))*7 + INTERP_32_MASK_2(p3)*2) / 16);
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}
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static inline u32 interp_32_11(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1) + INTERP_32_MASK_1(p2)) / 2)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1) + INTERP_32_MASK_2(p2)) / 2);
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}
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static inline u32 interp_32_31(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*3 + INTERP_32_MASK_1(p2)) / 4)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*3 + INTERP_32_MASK_2(p2)) / 4);
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}
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static inline u32 interp_32_1411(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*14 + INTERP_32_MASK_1(p2) + INTERP_32_MASK_1(p3)) / 16)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*14 + INTERP_32_MASK_2(p2) + INTERP_32_MASK_2(p3)) / 16);
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}
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static inline u32 interp_32_431(u32 p1, u32 p2, u32 p3)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*4 + INTERP_32_MASK_1(p2)*3 + INTERP_32_MASK_1(p3)) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*4 + INTERP_32_MASK_2(p2)*3 + INTERP_32_MASK_2(p3)) / 8);
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}
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static inline u32 interp_32_53(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*5 + INTERP_32_MASK_1(p2)*3) / 8)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*5 + INTERP_32_MASK_2(p2)*3) / 8);
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}
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static inline u32 interp_32_151(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*15 + INTERP_32_MASK_1(p2)) / 16)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*15 + INTERP_32_MASK_2(p2)) / 16);
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}
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static inline u32 interp_32_97(u32 p1, u32 p2)
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{
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return INTERP_32_MASK_1((INTERP_32_MASK_1(p1)*9 + INTERP_32_MASK_1(p2)*7) / 16)
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| INTERP_32_MASK_2((INTERP_32_MASK_2(p1)*9 + INTERP_32_MASK_2(p2)*7) / 16);
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}
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/***************************************************************************/
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/* diff */
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#define INTERP_Y_LIMIT (0x30*4)
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#define INTERP_U_LIMIT (0x07*4)
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#define INTERP_V_LIMIT (0x06*8)
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static int interp_16_diff(u16 p1, u16 p2)
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{
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int r, g, b;
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int y, u, v;
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if (p1 == p2)
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return 0;
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if (interp_bits_per_pixel == 16) {
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b = (int)((p1 & 0x1F) - (p2 & 0x1F)) << 3;
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g = (int)((p1 & 0x7E0) - (p2 & 0x7E0)) >> 3;
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r = (int)((p1 & 0xF800) - (p2 & 0xF800)) >> 8;
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} else {
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b = (int)((p1 & 0x1F) - (p2 & 0x1F)) << 3;
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g = (int)((p1 & 0x3E0) - (p2 & 0x3E0)) >> 2;
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r = (int)((p1 & 0x7C00) - (p2 & 0x7C00)) >> 7;
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}
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y = r + g + b;
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u = r - b;
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v = -r + 2*g - b;
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if (y < -INTERP_Y_LIMIT || y > INTERP_Y_LIMIT)
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return 1;
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if (u < -INTERP_U_LIMIT || u > INTERP_U_LIMIT)
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return 1;
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if (v < -INTERP_V_LIMIT || v > INTERP_V_LIMIT)
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return 1;
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return 0;
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}
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static int interp_32_diff(u32 p1, u32 p2)
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{
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int r, g, b;
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int y, u, v;
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if ((p1 & 0xF8F8F8) == (p2 & 0xF8F8F8))
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return 0;
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b = (int)((p1 & 0xFF) - (p2 & 0xFF));
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g = (int)((p1 & 0xFF00) - (p2 & 0xFF00)) >> 8;
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r = (int)((p1 & 0xFF0000) - (p2 & 0xFF0000)) >> 16;
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y = r + g + b;
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u = r - b;
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v = -r + 2*g - b;
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if (y < -INTERP_Y_LIMIT || y > INTERP_Y_LIMIT)
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return 1;
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if (u < -INTERP_U_LIMIT || u > INTERP_U_LIMIT)
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return 1;
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if (v < -INTERP_V_LIMIT || v > INTERP_V_LIMIT)
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return 1;
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return 0;
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}
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static void interp_set(unsigned bits_per_pixel)
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{
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interp_bits_per_pixel = bits_per_pixel;
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switch (bits_per_pixel) {
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case 15 :
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interp_mask[0] = 0x7C1F;
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interp_mask[1] = 0x03E0;
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break;
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case 16 :
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interp_mask[0] = 0xF81F;
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interp_mask[1] = 0x07E0;
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break;
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case 32 :
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interp_mask[0] = 0xFF00FF;
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interp_mask[1] = 0x00FF00;
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break;
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}
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}
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#endif
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