project64/Source/Glide64/Util.h

141 lines
4.3 KiB
C++

/*
* Glide64 - Glide video plugin for Nintendo 64 emulators.
* Copyright (c) 2002 Dave2001
* Copyright (c) 2003-2009 Sergey 'Gonetz' Lipski
*
* 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
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//****************************************************************
//
// Glide64 - Glide Plugin for Nintendo 64 emulators
// Project started on December 29th, 2001
//
// Authors:
// Dave2001, original author, founded the project in 2001, left it in 2002
// Gugaman, joined the project in 2002, left it in 2002
// Sergey 'Gonetz' Lipski, joined the project in 2002, main author since fall of 2002
// Hiroshi 'KoolSmoky' Morii, joined the project in 2007
//
//****************************************************************
//
// To modify Glide64:
// * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
// * Do NOT send me the whole project or file that you modified. Take out your modified code sections, and tell me where to put them. If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
//
//****************************************************************
#ifndef Util_H
#define Util_H
#define NOT_TMU0 0x00
#define NOT_TMU1 0x01
#define NOT_TMU2 0x02
void util_init();
int cull_tri(VERTEX **v);
void draw_tri(VERTEX **v, uint16_t linew = 0);
void do_triangle_stuff(uint16_t linew = 0, int old_interpolate = TRUE);
void do_triangle_stuff_2(uint16_t linew = 0);
void apply_shade_mods(VERTEX *v);
void update();
void update_scissor();
void set_message_combiner();
float ScaleZ(float z);
// positional and texel coordinate clipping
#define CCLIP(ux,lx,ut,lt,uc,lc) \
if (ux > lx || lx < uc || ux > lc) { rdp.tri_n += 2; return; } \
if (ux < uc) { \
float p = (uc-ux)/(lx-ux); \
ut = p*(lt-ut)+ut; \
ux = uc; \
} \
if (lx > lc) { \
float p = (lc-ux)/(lx-ux); \
lt = p*(lt-ut)+ut; \
lx = lc; \
}
#define CCLIP2(ux,lx,ut,lt,un,ln,uc,lc) \
if (ux > lx || lx < uc || ux > lc) { rdp.tri_n += 2; return; } \
if (ux < uc) { \
float p = (uc-ux)/(lx-ux); \
ut = p*(lt-ut)+ut; \
un = p*(ln-un)+un; \
ux = uc; \
} \
if (lx > lc) { \
float p = (lc-ux)/(lx-ux); \
lt = p*(lt-ut)+ut; \
ln = p*(ln-un)+un; \
lx = lc; \
}
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
#include <stdlib.h>
#define bswap32(x) _byteswap_ulong(x)
#else
static inline uint32_t bswap32(uint32_t val)
{
return (((val & 0xff000000) >> 24) |
((val & 0x00ff0000) >> 8) |
((val & 0x0000ff00) << 8) |
((val & 0x000000ff) << 24));
}
#endif
#define ALOWORD(x) (*((uint16_t*)&(x))) // low word
static inline uint16_t __ROR__(uint16_t value, unsigned int count)
{
const unsigned int nbits = sizeof(uint16_t) * 8;
count %= nbits;
uint16_t low = (value << (nbits - count)) & 0xFFFF;
value >>= count;
value |= low;
return value;
}
template<class T> static inline T __ROR__(T value, unsigned int count)
{
const unsigned int nbits = sizeof(T) * 8;
count %= nbits;
T low = value << (nbits - count);
value >>= count;
value |= low;
return value;
}
// rotate left
template<class T> static T __ROL__(T value, unsigned int count)
{
const unsigned int nbits = sizeof(T) * 8;
count %= nbits;
T high = value >> (nbits - count);
value <<= count;
value |= high;
return value;
}
#endif // ifndef Util_H