92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
|
|
* blend.h
|
|
*
|
|
* Copyright (C) 2005 Matt Ownby
|
|
*
|
|
* This file is part of DAPHNE, a laserdisc arcade game emulator
|
|
*
|
|
* DAPHNE 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.
|
|
*
|
|
* DAPHNE 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
|
|
*/
|
|
|
|
// blend.h
|
|
|
|
|
|
#ifndef BLEND_H
|
|
#define BLEND_H
|
|
|
|
#ifdef MAC_OSX
|
|
#include "mmxdefs.h"
|
|
#endif
|
|
|
|
#include <SDL.h> // for datatype defs
|
|
|
|
// TO USE THE BLEND FUNCTIONS:
|
|
// 1 - set g_blend_line1 to the first line of bytes to be averaged
|
|
// 2 - set g_blend_line2 to the second line of bytes to be averaged
|
|
// 3 - set g_blend_dest to the line of bytes that will be the destination
|
|
// 4 - set g_blend_iterations to how many bytes long all lines are (they all must be the same length).
|
|
// IMPORTANT : g_blend_iterations must be a multiple of 8, and must be >= 8!
|
|
// 5 - run g_blend_func() and you're done!
|
|
|
|
// we always want this function defined for the purpose of testing (releasetest.cpp)
|
|
void blend_c();
|
|
|
|
// Here we make some definitions so that the MMX/C code use identical syntax and variables
|
|
#ifdef USE_MMX
|
|
|
|
#if defined (MAC_OSX) || defined (WIN32)
|
|
extern "C" void blend_mmx();
|
|
extern "C" Uint8 *asm_line1;
|
|
extern "C" Uint8 *asm_line2;
|
|
extern "C" Uint8 *asm_dest;
|
|
extern "C" Uint32 asm_iterations;
|
|
#define g_blend_line1 asm_line1
|
|
#define g_blend_line2 asm_line2
|
|
#define g_blend_dest asm_dest
|
|
#define g_blend_iterations asm_iterations
|
|
#else
|
|
extern "C" void _blend_mmx();
|
|
extern "C" Uint8 *_asm_line1;
|
|
extern "C" Uint8 *_asm_line2;
|
|
extern "C" Uint8 *_asm_dest;
|
|
extern "C" Uint32 _asm_iterations;
|
|
#define g_blend_line1 _asm_line1
|
|
#define g_blend_line2 _asm_line2
|
|
#define g_blend_dest _asm_dest
|
|
#define g_blend_iterations _asm_iterations
|
|
#define blend_mmx _blend_mmx
|
|
#endif // MAC_OSX
|
|
|
|
// debug version gets some extra (slower) error checking
|
|
#ifdef DEBUG
|
|
#define g_blend_func debug_blend_mmx
|
|
void debug_blend_mmx();
|
|
#else
|
|
// here is the fast release version
|
|
#define g_blend_func blend_mmx
|
|
#endif
|
|
|
|
#else
|
|
|
|
extern Uint8 *g_blend_line1;
|
|
extern Uint8 *g_blend_line2;
|
|
extern Uint8 *g_blend_dest;
|
|
extern Uint32 g_blend_iterations;
|
|
#define g_blend_func blend_c
|
|
#endif // USE_MMX
|
|
|
|
/////////////////////////////
|
|
|
|
#endif
|