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<div id="projectname">SDL2_gfx
 <span id="projectnumber">1.0.2</span>
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<div id="projectbrief">GraphicsprimitivesandsurfacefunctionsforSDL2</div>
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<div class="title">/cygdrive/i/Sources/sdl2gfx/SDL2_rotozoom.h</div> </div>
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<a href="_s_d_l2__rotozoom_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">SDL2_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"></span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">Copyright (C) 2012-2014 Andreas Schiffler</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"></span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">This software is provided 'as-is', without any express or implied</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">warranty. In no event will the authors be held liable for any damages</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">arising from the use of this software.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">Permission is granted to anyone to use this software for any purpose,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">including commercial applications, and to alter it and redistribute it</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">freely, subject to the following restrictions:</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"></span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">1. The origin of this software must not be misrepresented; you must not</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">claim that you wrote the original software. If you use this software</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">in a product, an acknowledgment in the product documentation would be</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">appreciated but is not required.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">2. Altered source versions must be plainly marked as such, and must not be</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">misrepresented as being the original software.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">3. This notice may not be removed or altered from any source</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">distribution.</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">Andreas Schiffler -- aschiffler at ferzkopp dot net</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef _SDL2_rotozoom_h</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define _SDL2_rotozoom_h</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <math.h></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">/* Set up for C function definitions, even when using C++ */</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#ifndef M_PI</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="_s_d_l2__rotozoom_8h.html#ae71449b1cc6e6250b91f539153a7a0d3"> 41</a></span> <span class="preprocessor">#define M_PI 3.1415926535897932384626433832795</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include "SDL.h"</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">/* ---- Defines */</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="_s_d_l2__rotozoom_8h.html#a6541cd06edcce77d8a6f1c6350c988af"> 51</a></span> <span class="preprocessor">#define SMOOTHING_OFF 0</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="_s_d_l2__rotozoom_8h.html#abeb6ae7618fcb315d0399fe65849a2e8"> 56</a></span> <span class="preprocessor">#define SMOOTHING_ON 1</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">/* ---- Function Prototypes */</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#ifdef _MSC_VER</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"># if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"># define SDL2_ROTOZOOM_SCOPE __declspec(dllexport)</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"># else</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"># ifdef LIBSDL2_GFX_DLL_IMPORT</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor"># define SDL2_ROTOZOOM_SCOPE __declspec(dllimport)</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"># endif</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"># endif</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#ifndef SDL2_ROTOZOOM_SCOPE</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7"> 70</a></span> <span class="preprocessor"># define SDL2_ROTOZOOM_SCOPE extern</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"></span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> Rotozoom functions</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"></span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l2__rotozoom_8h.html#a6f5f31a362f63370dc60049df14d6856">rotozoomSurface</a>(SDL_Surface * src, <span class="keywordtype">double</span> angle, <span class="keywordtype">double</span> zoom, <span class="keywordtype">int</span> smooth);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l2__rotozoom_8h.html#a592d84489ce544c050a9f3fe0e04f3f6">rotozoomSurfaceXY</a></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  (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);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l2__rotozoom_8h.html#a9097c513174e2d97603292c08a9db923">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,</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">int</span> *dstheight);</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l2__rotozoom_8h.html#aa0126562efa572575e3962fe51d69e7c">rotozoomSurfaceSizeXY</a></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  (<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, </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">int</span> *dstwidth, <span class="keywordtype">int</span> *dstheight);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"></span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> Zooming functions</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"></span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l2__rotozoom_8h.html#a0867857132421429994198cabacb0528">zoomSurface</a>(SDL_Surface * src, <span class="keywordtype">double</span> zoomx, <span class="keywordtype">double</span> zoomy, <span class="keywordtype">int</span> smooth);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> <span class="keywordtype">void</span> <a class="code" href="_s_d_l2__rotozoom_8h.html#a87a121da75a099fd980295c759a7005d">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);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"></span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> Shrinking functions</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"></span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> SDL_Surface *<a class="code" href="_s_d_l2__rotozoom_8h.html#a9adfe732cbca348e3287096e7c67e72d">shrinkSurface</a>(SDL_Surface * src, <span class="keywordtype">int</span> factorx, <span class="keywordtype">int</span> factory);</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"></span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> Specialized rotation functions</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"></span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a> SDL_Surface* <a class="code" href="_s_d_l2__rotozoom_8h.html#ac2858dec47549c8f82360568b5a29363">rotateSurface90Degrees</a>(SDL_Surface* src, <span class="keywordtype">int</span> numClockwiseTurns);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="comment">/* Ends C function definitions when using C++ */</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#endif </span><span class="comment">/* _SDL2_rotozoom_h */</span><span class="preprocessor"></span></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_ac2858dec47549c8f82360568b5a29363"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#ac2858dec47549c8f82360568b5a29363">rotateSurface90Degrees</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE SDL_Surface * rotateSurface90Degrees(SDL_Surface *src, int numClockwiseTurns)</div><div class="ttdoc">Rotates a 8/16/24/32 bit surface in increments of 90 degrees. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l00803">SDL2_rotozoom.c:803</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a592d84489ce544c050a9f3fe0e04f3f6"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a592d84489ce544c050a9f3fe0e04f3f6">rotozoomSurfaceXY</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE SDL_Surface * rotozoomSurfaceXY(SDL_Surface *src, double angle, double zoomx, double zoomy, int smooth)</div><div class="ttdoc">Rotates and zooms a surface with different horizontal and vertival scaling factors and optional anti-...</div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01056">SDL2_rotozoom.c:1056</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_ab3316f8a2f78ed696bbe0242c75b6ee7"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#ab3316f8a2f78ed696bbe0242c75b6ee7">SDL2_ROTOZOOM_SCOPE</a></div><div class="ttdeci">#define SDL2_ROTOZOOM_SCOPE</div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8h_source.html#l00070">SDL2_rotozoom.h:70</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a6f5f31a362f63370dc60049df14d6856"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a6f5f31a362f63370dc60049df14d6856">rotozoomSurface</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE SDL_Surface * rotozoomSurface(SDL_Surface *src, double angle, double zoom, int smooth)</div><div class="ttdoc">Rotates and zooms a surface and optional anti-aliasing. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01035">SDL2_rotozoom.c:1035</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a9adfe732cbca348e3287096e7c67e72d"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a9adfe732cbca348e3287096e7c67e72d">shrinkSurface</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE SDL_Surface * shrinkSurface(SDL_Surface *src, int factorx, int factory)</div><div class="ttdoc">Shrink a surface by an integer ratio using averaging. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01512">SDL2_rotozoom.c:1512</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a9097c513174e2d97603292c08a9db923"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a9097c513174e2d97603292c08a9db923">rotozoomSurfaceSize</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, int *dstheight)</div><div class="ttdoc">Returns the size of the resulting target surface for a rotozoomSurface() call. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01013">SDL2_rotozoom.c:1013</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_aa0126562efa572575e3962fe51d69e7c"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#aa0126562efa572575e3962fe51d69e7c">rotozoomSurfaceSizeXY</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY(int width, int height, double angle, double zoomx, double zoomy, int *dstwidth, int *dstheight)</div><div class="ttdoc">Returns the size of the resulting target surface for a rotozoomSurfaceXY() call. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l00996">SDL2_rotozoom.c:996</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a0867857132421429994198cabacb0528"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a0867857132421429994198cabacb0528">zoomSurface</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE SDL_Surface * zoomSurface(SDL_Surface *src, double zoomx, double zoomy, int smooth)</div><div class="ttdoc">Zoom a surface by independent horizontal and vertical factors with optional smoothing. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01361">SDL2_rotozoom.c:1361</a></div></div>
<div class="ttc" id="_s_d_l2__rotozoom_8h_html_a87a121da75a099fd980295c759a7005d"><div class="ttname"><a href="_s_d_l2__rotozoom_8h.html#a87a121da75a099fd980295c759a7005d">zoomSurfaceSize</a></div><div class="ttdeci">SDL2_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight)</div><div class="ttdoc">Calculates the size of the target surface for a zoomSurface() call. </div><div class="ttdef"><b>Definition:</b> <a href="_s_d_l2__rotozoom_8c_source.html#l01311">SDL2_rotozoom.c:1311</a></div></div>
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