Mercurial > sdl-ios-xcode
annotate src/libm/s_copysign.c @ 2884:9dde605c7540
Date: Fri, 19 Dec 2008 20:17:35 +0100
From: Couriersud
Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions
> For consistency you'd probably want:
> SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a);
> SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode);
> SDL_RenderLine(int x1, int y1, int x2, int y2);
> SDL_RenderFill(SDL_Rect *rect);
>
> You probably also want to add API functions query the current state.
>
I have implemented the above api for the opengl, x11, directfb and
software renderers. I have also renamed *TEXTUREBLENDMODE* constants to
BLENDMODE*. The unix build compiles. The windows renderer still needs to
be updated, but I have no windows development machine at hand. Have a
look at the x11 renderer for a sample.
Vector games now run at 90% both on opengl and directfb in comparison to
sdlmame's own opengl renderer. The same applies to raster games.
The diff also includes
a) Changed XDrawRect to XFillRect in x11 renderer
b) A number of changes to fix blending and modulation issues in the
directfb renderer.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 20 Dec 2008 12:00:00 +0000 |
parents | a98604b691c8 |
children | dc1eb82ffdaa |
rev | line source |
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Expanded the libm support and put it into a separate directory.
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1 /* @(#)s_copysign.c 5.1 93/09/24 */ |
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2 /* |
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3 * ==================================================== |
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4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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5 * |
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6 * Developed at SunPro, a Sun Microsystems, Inc. business. |
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7 * Permission to use, copy, modify, and distribute this |
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8 * software is freely granted, provided that this notice |
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9 * is preserved. |
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10 * ==================================================== |
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11 */ |
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12 |
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13 #if defined(LIBM_SCCS) && !defined(lint) |
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14 static char rcsid[] = |
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15 "$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $"; |
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16 #endif |
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17 |
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18 /* |
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19 * copysign(double x, double y) |
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20 * copysign(x,y) returns a value with the magnitude of x and |
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21 * with the sign bit of y. |
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22 */ |
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23 |
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24 #include "math.h" |
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25 #include "math_private.h" |
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26 |
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27 libm_hidden_proto(copysign) |
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28 #ifdef __STDC__ |
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29 double copysign(double x, double y) |
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30 #else |
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31 double copysign(x, y) |
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32 double x, y; |
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33 #endif |
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34 { |
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35 u_int32_t hx, hy; |
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36 GET_HIGH_WORD(hx, x); |
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37 GET_HIGH_WORD(hy, y); |
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38 SET_HIGH_WORD(x, (hx & 0x7fffffff) | (hy & 0x80000000)); |
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39 return x; |
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40 } |
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41 |
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42 libm_hidden_def(copysign) |