view src/libm/math.h @ 2824:4dba7aa7ea77

Added slow but complete blit fallback Don't try to RLE encode surfaces that have alpha channel and alpha modulation Don't turn on blending when converting an RGB surface to RGBA format Do turn on blending when converting colorkey to alpha channel
author Sam Lantinga <slouken@libsdl.org>
date Tue, 02 Dec 2008 17:14:04 +0000
parents 2a46b5912665
children 99210400e8b9
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifdef HAVE_MATH_H
#define _USE_MATH_DEFINES
#include <math.h>
#else

/* Math routines from uClibc: http://www.uclibc.org */

#define M_PI    3.14159265358979323846264338327950288   /* pi */

extern double __ieee754_log(double x);
extern double __ieee754_pow(double x, double y);
extern double __ieee754_sqrt(double x);

#define log(x)      __ieee754_log(x)
#define pow(x, y)   __ieee754_pow(x, y)
#define sqrt(x)     __ieee754_sqrt(x)

extern double copysign(double x, double y);
extern double cos(double x);
extern double fabs(double x);
extern double floor(double x);
extern double scalbn(double x, int n);
extern double sin(double x);

#define sinf(x) (float)sin((double)x)
#define cosf(x) (float)cos((double)x)

#endif /* HAVE_MATH_H */

/* vi: set ts=4 sw=4 expandtab: */