1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2<html xmlns="http://www.w3.org/1999/xhtml"> 3<head> 4<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> 5<meta http-equiv="X-UA-Compatible" content="IE=9"/> 6<title>SDL_gfx: I:/Sources/sdlgfx/SDL_rotozoom.h Source File</title> 7 8<link href="tabs.css" rel="stylesheet" type="text/css"/> 9<link href="doxygen.css" rel="stylesheet" type="text/css" /> 10 11 12 13</head> 14<body> 15<div id="top"><!-- do not remove this div! --> 16 17 18<div id="titlearea"> 19<table cellspacing="0" cellpadding="0"> 20 <tbody> 21 <tr style="height: 56px;"> 22 23 24 <td style="padding-left: 0.5em;"> 25 <div id="projectname">SDL_gfx 26  <span id="projectnumber">2.0.25</span> 27 </div> 28 29 </td> 30 31 32 33 </tr> 34 </tbody> 35</table> 36</div> 37 38<!-- Generated by Doxygen 1.8.0 --> 39 <div id="navrow1" class="tabs"> 40 <ul class="tablist"> 41 <li><a href="index.html"><span>Main Page</span></a></li> 42 <li><a href="annotated.html"><span>Data Structures</span></a></li> 43 <li class="current"><a href="files.html"><span>Files</span></a></li> 44 </ul> 45 </div> 46 <div id="navrow2" class="tabs2"> 47 <ul class="tablist"> 48 <li><a href="files.html"><span>File List</span></a></li> 49 <li><a href="globals.html"><span>Globals</span></a></li> 50 </ul> 51 </div> 52</div> 53<div class="header"> 54 <div class="headertitle"> 55<div class="title">I:/Sources/sdlgfx/SDL_rotozoom.h</div> </div> 56</div><!--header--> 57<div class="contents"> 58<a href="_s_d_l__rotozoom_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* </span> 59<a name="l00002"></a>00002 <span class="comment"></span> 60<a name="l00003"></a>00003 <span class="comment">SDL_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces</span> 61<a name="l00004"></a>00004 <span class="comment"></span> 62<a name="l00005"></a>00005 <span class="comment">Copyright (C) 2001-2012 Andreas Schiffler</span> 63<a name="l00006"></a>00006 <span class="comment"></span> 64<a name="l00007"></a>00007 <span class="comment">This software is provided 'as-is', without any express or implied</span> 65<a name="l00008"></a>00008 <span class="comment">warranty. In no event will the authors be held liable for any damages</span> 66<a name="l00009"></a>00009 <span class="comment">arising from the use of this software.</span> 67<a name="l00010"></a>00010 <span class="comment"></span> 68<a name="l00011"></a>00011 <span class="comment">Permission is granted to anyone to use this software for any purpose,</span> 69<a name="l00012"></a>00012 <span class="comment">including commercial applications, and to alter it and redistribute it</span> 70<a name="l00013"></a>00013 <span class="comment">freely, subject to the following restrictions:</span> 71<a name="l00014"></a>00014 <span class="comment"></span> 72<a name="l00015"></a>00015 <span class="comment">1. The origin of this software must not be misrepresented; you must not</span> 73<a name="l00016"></a>00016 <span class="comment">claim that you wrote the original software. If you use this software</span> 74<a name="l00017"></a>00017 <span class="comment">in a product, an acknowledgment in the product documentation would be</span> 75<a name="l00018"></a>00018 <span class="comment">appreciated but is not required.</span> 76<a name="l00019"></a>00019 <span class="comment"></span> 77<a name="l00020"></a>00020 <span class="comment">2. Altered source versions must be plainly marked as such, and must not be</span> 78<a name="l00021"></a>00021 <span class="comment">misrepresented as being the original software.</span> 79<a name="l00022"></a>00022 <span class="comment"></span> 80<a name="l00023"></a>00023 <span class="comment">3. This notice may not be removed or altered from any source</span> 81<a name="l00024"></a>00024 <span class="comment">distribution.</span> 82<a name="l00025"></a>00025 <span class="comment"></span> 83<a name="l00026"></a>00026 <span class="comment">Andreas Schiffler -- aschiffler at ferzkopp dot net</span> 84<a name="l00027"></a>00027 <span class="comment"></span> 85<a name="l00028"></a>00028 <span class="comment">*/</span> 86<a name="l00029"></a>00029 87<a name="l00030"></a>00030 <span class="preprocessor">#ifndef _SDL_rotozoom_h</span> 88<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define _SDL_rotozoom_h</span> 89<a name="l00032"></a>00032 <span class="preprocessor"></span> 90<a name="l00033"></a>00033 <span class="preprocessor">#include <math.h></span> 91<a name="l00034"></a>00034 92<a name="l00035"></a>00035 <span class="comment">/* Set up for C function definitions, even when using C++ */</span> 93<a name="l00036"></a>00036 <span class="preprocessor">#ifdef __cplusplus</span> 94<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> { 95<a name="l00038"></a>00038 <span class="preprocessor">#endif</span> 96<a name="l00039"></a>00039 <span class="preprocessor"></span> 97<a name="l00040"></a>00040 <span class="preprocessor">#ifndef M_PI</span> 98<a name="l00041"></a><a class="code" href="_s_d_l__rotozoom_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">00041</a> <span class="preprocessor"></span><span class="preprocessor">#define M_PI 3.141592654</span> 99<a name="l00042"></a>00042 <span class="preprocessor"></span><span class="preprocessor">#endif</span> 100<a name="l00043"></a>00043 <span class="preprocessor"></span> 101<a name="l00044"></a>00044 <span class="preprocessor">#include "SDL.h"</span> 102<a name="l00045"></a>00045 103<a name="l00046"></a>00046 <span class="comment">/* ---- Defines */</span> 104<a name="l00047"></a>00047 105<a name="l00051"></a><a class="code" href="_s_d_l__rotozoom_8h.html#a6541cd06edcce77d8a6f1c6350c988af">00051</a> <span class="preprocessor">#define SMOOTHING_OFF 0</span> 106<a name="l00052"></a>00052 <span class="preprocessor"></span> 107<a name="l00056"></a><a class="code" href="_s_d_l__rotozoom_8h.html#abeb6ae7618fcb315d0399fe65849a2e8">00056</a> <span class="preprocessor">#define SMOOTHING_ON 1</span> 108<a name="l00057"></a>00057 <span class="preprocessor"></span> 109<a name="l00058"></a>00058 <span class="comment">/* ---- Function Prototypes */</span> 110<a name="l00059"></a>00059 111<a name="l00060"></a>00060 <span class="preprocessor">#ifdef _MSC_VER</span> 112<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor"># if defined(DLL_EXPORT) && !defined(LIBSDL_GFX_DLL_IMPORT)</span> 113<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor"># define SDL_ROTOZOOM_SCOPE __declspec(dllexport)</span> 114<a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor"># else</span> 115<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor"># ifdef LIBSDL_GFX_DLL_IMPORT</span> 116<a name="l00065"></a>00065 <span class="preprocessor"></span><span class="preprocessor"># define SDL_ROTOZOOM_SCOPE __declspec(dllimport)</span> 117<a name="l00066"></a>00066 <span class="preprocessor"></span><span class="preprocessor"># endif</span> 118<a name="l00067"></a>00067 <span class="preprocessor"></span><span class="preprocessor"># endif</span> 119<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#endif</span> 120<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#ifndef SDL_ROTOZOOM_SCOPE</span> 121<a name="l00070"></a><a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">00070</a> <span class="preprocessor"></span><span class="preprocessor"># define SDL_ROTOZOOM_SCOPE extern</span> 122<a name="l00071"></a>00071 <span class="preprocessor"></span><span class="preprocessor">#endif</span> 123<a name="l00072"></a>00072 <span class="preprocessor"></span> 124<a name="l00073"></a>00073 <span class="comment">/* </span> 125<a name="l00074"></a>00074 <span class="comment"></span> 126<a name="l00075"></a>00075 <span class="comment"> Rotozoom functions</span> 127<a name="l00076"></a>00076 <span class="comment"></span> 128<a name="l00077"></a>00077 <span class="comment"> */</span> 129<a name="l00078"></a>00078 130<a name="l00079"></a>00079 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l__rotozoom_8c.html#a5f64ed53eeee5f2667971c857698d1e5" title="Rotates and zooms a surface and optional anti-aliasing.">rotozoomSurface</a>(SDL_Surface * src, <span class="keywordtype">double</span> angle, <span class="keywordtype">double</span> zoom, <span class="keywordtype">int</span> smooth); 131<a name="l00080"></a>00080 132<a name="l00081"></a>00081 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l__rotozoom_8c.html#aab98b5b0da4ea468bacf47f7b85f0ee2" title="Rotates and zooms a surface with different horizontal and vertival scaling factors and optional anti-...">rotozoomSurfaceXY</a> 133<a name="l00082"></a>00082 (SDL_Surface * src, <span class="keywordtype">double</span> angle, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy, <span class="keywordtype">int</span> smooth); 134<a name="l00083"></a>00083 135<a name="l00084"></a>00084 136<a name="l00085"></a>00085 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l__rotozoom_8c.html#a9886c783255edfd70a4974f8f3dd5a8c" title="Returns the size of the resulting target surface for a rotozoomSurface() call.">rotozoomSurfaceSize</a>(<span class="keywordtype">int</span> width, <span class="keywordtype">int</span> height, <span class="keywordtype">double</span> angle, <span class="keywordtype">double</span> zoom, <span class="keywordtype">int</span> *dstwidth, 137<a name="l00086"></a>00086 <span class="keywordtype">int</span> *dstheight); 138<a name="l00087"></a>00087 139<a name="l00088"></a>00088 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l__rotozoom_8c.html#aee64992d26c818d9975610754d5c929b" title="Returns the size of the resulting target surface for a rotozoomSurfaceXY() call.">rotozoomSurfaceSizeXY</a> 140<a name="l00089"></a>00089 (<span class="keywordtype">int</span> width, <span class="keywordtype">int</span> height, <span class="keywordtype">double</span> angle, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy, 141<a name="l00090"></a>00090 <span class="keywordtype">int</span> *dstwidth, <span class="keywordtype">int</span> *dstheight); 142<a name="l00091"></a>00091 143<a name="l00092"></a>00092 <span class="comment">/* </span> 144<a name="l00093"></a>00093 <span class="comment"></span> 145<a name="l00094"></a>00094 <span class="comment"> Zooming functions</span> 146<a name="l00095"></a>00095 <span class="comment"></span> 147<a name="l00096"></a>00096 <span class="comment"> */</span> 148<a name="l00097"></a>00097 149<a name="l00098"></a>00098 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l__rotozoom_8c.html#abdd772b2f6b1f26134e4e90cda657a21" title="Zoom a surface by independent horizontal and vertical factors with optional smoothing.">zoomSurface</a>(SDL_Surface * src, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy, <span class="keywordtype">int</span> smooth); 150<a name="l00099"></a>00099 151<a name="l00100"></a>00100 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l__rotozoom_8c.html#a8ba40859c1a977dae87488dd8be1bf9a" title="Calculates the size of the target surface for a zoomSurface() call.">zoomSurfaceSize</a>(<span class="keywordtype">int</span> width, <span class="keywordtype">int</span> height, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy, <span class="keywordtype">int</span> *dstwidth, <span class="keywordtype">int</span> *dstheight); 152<a name="l00101"></a>00101 153<a name="l00102"></a>00102 <span class="comment">/* </span> 154<a name="l00103"></a>00103 <span class="comment"></span> 155<a name="l00104"></a>00104 <span class="comment"> Shrinking functions</span> 156<a name="l00105"></a>00105 <span class="comment"></span> 157<a name="l00106"></a>00106 <span class="comment"> */</span> 158<a name="l00107"></a>00107 159<a name="l00108"></a>00108 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l__rotozoom_8c.html#aad3bf0cd89cc39ff874ffa778fa1495d" title="Shrink a surface by an integer ratio using averaging.">shrinkSurface</a>(SDL_Surface * src, <span class="keywordtype">int</span> factorx, <span class="keywordtype">int</span> factory); 160<a name="l00109"></a>00109 161<a name="l00110"></a>00110 <span class="comment">/* </span> 162<a name="l00111"></a>00111 <span class="comment"></span> 163<a name="l00112"></a>00112 <span class="comment"> Specialized rotation functions</span> 164<a name="l00113"></a>00113 <span class="comment"></span> 165<a name="l00114"></a>00114 <span class="comment"> */</span> 166<a name="l00115"></a>00115 167<a name="l00116"></a>00116 <a class="code" href="_s_d_l__rotozoom_8h.html#a5115250bd769f389e278cd5adfb63179">SDL_ROTOZOOM_SCOPE</a> SDL_Surface* <a class="code" href="_s_d_l__rotozoom_8c.html#a77563d68634cb2624d4f2f0bcdc19e73" title="Rotates a 32 bit surface in increments of 90 degrees.">rotateSurface90Degrees</a>(SDL_Surface* src, <span class="keywordtype">int</span> numClockwiseTurns); 168<a name="l00117"></a>00117 169<a name="l00118"></a>00118 <span class="comment">/* Ends C function definitions when using C++ */</span> 170<a name="l00119"></a>00119 <span class="preprocessor">#ifdef __cplusplus</span> 171<a name="l00120"></a>00120 <span class="preprocessor"></span>} 172<a name="l00121"></a>00121 <span class="preprocessor">#endif</span> 173<a name="l00122"></a>00122 <span class="preprocessor"></span> 174<a name="l00123"></a>00123 <span class="preprocessor">#endif </span><span class="comment">/* _SDL_rotozoom_h */</span> 175</pre></div></div><!-- contents --> 176 177 178<hr class="footer"/><address class="footer"><small> 179Generated by  <a href="http://www.doxygen.org/index.html"> 180<img class="footer" src="doxygen.png" alt="doxygen"/> 181</a> 1.8.0 182</small></address> 183 184</body> 185</html> 186
