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annotate src/libm/math.h @ 2813:49243a6e9ff1

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Removed the hacky stuff for YUV OpenGL textures, since Ryan's pixel shader code will be far superior. :)
author Sam Lantinga <slouken@libsdl.org>
date Mon, 01 Dec 2008 00:05:31 +0000
parents 2a46b5912665
children 99210400e8b9
rev   line source
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a98604b691c8 Expanded the libm support and put it into a separate directory.
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
a98604b691c8 Expanded the libm support and put it into a separate directory.
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
a98604b691c8 Expanded the libm support and put it into a separate directory.
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef HAVE_MATH_H
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25 #define _USE_MATH_DEFINES
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26 #include <math.h>
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27 #else
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28
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29 /* Math routines from uClibc: http://www.uclibc.org */
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30
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31 #define M_PI 3.14159265358979323846264338327950288 /* pi */
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32
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33 extern double __ieee754_log(double x);
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34 extern double __ieee754_pow(double x, double y);
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35 extern double __ieee754_sqrt(double x);
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36
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37 #define log(x) __ieee754_log(x)
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38 #define pow(x, y) __ieee754_pow(x, y)
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39 #define sqrt(x) __ieee754_sqrt(x)
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40
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41 extern double copysign(double x, double y);
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42 extern double cos(double x);
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43 extern double fabs(double x);
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44 extern double floor(double x);
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45 extern double scalbn(double x, int n);
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46 extern double sin(double x);
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47
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48 #define sinf(x) (float)sin((double)x)
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49 #define cosf(x) (float)cos((double)x)
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50
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51 #endif /* HAVE_MATH_H */
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52
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53 /* vi: set ts=4 sw=4 expandtab: */