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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Leptonica: prog/blendcmaptest.c Source File</title>
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<div id="projectname">Leptonica <span id="projectnumber">1.68</span></div>
<div id="projectbrief">C Image Processing Library</div>
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<h1>blendcmaptest.c</h1> </div>
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<a href="blendcmaptest_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*====================================================================*</span>
<a name="l00002"></a>00002 <span class="comment"> - Copyright (C) 2001 Leptonica. All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment"> - This software is distributed in the hope that it will be</span>
<a name="l00004"></a>00004 <span class="comment"> - useful, but with NO WARRANTY OF ANY KIND.</span>
<a name="l00005"></a>00005 <span class="comment"> - No author or distributor accepts responsibility to anyone for the</span>
<a name="l00006"></a>00006 <span class="comment"> - consequences of using this software, or for whether it serves any</span>
<a name="l00007"></a>00007 <span class="comment"> - particular purpose or works at all, unless he or she says so in</span>
<a name="l00008"></a>00008 <span class="comment"> - writing. Everyone is granted permission to copy, modify and</span>
<a name="l00009"></a>00009 <span class="comment"> - redistribute this source code, for commercial or non-commercial</span>
<a name="l00010"></a>00010 <span class="comment"> - purposes, with the following restrictions: (1) the origin of this</span>
<a name="l00011"></a>00011 <span class="comment"> - source code must not be misrepresented; (2) modified versions must</span>
<a name="l00012"></a>00012 <span class="comment"> - be plainly marked as such; and (3) this notice may not be removed</span>
<a name="l00013"></a>00013 <span class="comment"> - or altered from any source or modified source distribution.</span>
<a name="l00014"></a>00014 <span class="comment"> *====================================================================*/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">/*</span>
<a name="l00017"></a>00017 <span class="comment"> * blendcmaptest.c</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#include <stdio.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "allheaders.h"</span>
<a name="l00024"></a>00024
<a name="l00025"></a><a class="code" href="blendcmaptest_8c.html#a4a9d32ff035c82119003134767948ebf">00025</a> <span class="preprocessor">#define NX 4</span>
<a name="l00026"></a><a class="code" href="blendcmaptest_8c.html#a652e87ecc9140879666ae9d6bf4ca893">00026</a> <span class="preprocessor"></span><span class="preprocessor">#define NY 5</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span>
<a name="l00028"></a><a class="code" href="blendcmaptest_8c.html#af468c1079b477fc16dbd689616ef060f">00028</a> <span class="preprocessor">#define FADE_FRACTION 0.75</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a><a class="code" href="blendcmaptest_8c.html#a5ea466849f21e6c2be4ef9b2eb8868d3">00030</a> <a class="code" href="src_2endiantest_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>(<span class="keywordtype">int</span> argc,
<a name="l00031"></a>00031 <span class="keywordtype">char</span> **argv)
<a name="l00032"></a>00032 {
<a name="l00033"></a>00033 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> i, j, sindex, wb, hb, ws, hs, delx, dely, x, y, <a class="code" href="maze__reg_8c.html#aac7c06d80b20c083769c1fb37af624ed">y0</a>;
<a name="l00034"></a>00034 <a class="code" href="struct_pix.html">PIX</a> *pixs, *pixb, *pixt0, *pixt1;
<a name="l00035"></a>00035 <a class="code" href="struct_pix_colormap.html">PIXCMAP</a> *cmap;
<a name="l00036"></a>00036 <span class="keyword">static</span> <span class="keywordtype">char</span> mainName[] = <span class="stringliteral">"blendcmaptest"</span>;
<a name="l00037"></a>00037
<a name="l00038"></a>00038 pixs = <a class="code" href="leptprotos_8h.html#a84634846cbb5e01df667d6e9241dfc53">pixRead</a>(<span class="stringliteral">"rabi.png"</span>);
<a name="l00039"></a>00039 pixb = <a class="code" href="leptprotos_8h.html#a84634846cbb5e01df667d6e9241dfc53">pixRead</a>(<span class="stringliteral">"weasel4.11c.png"</span>);
<a name="l00040"></a>00040 <a class="code" href="leptprotos_8h.html#a5f7e20d7f986e81b5caa47e38def8985">pixDisplayWrite</a>(<a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, -1);
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">/* Fade the blender */</span>
<a name="l00043"></a>00043 <a class="code" href="colormap_8c.html#ab4a13b372fd349213345ec7ebff8d9e5">pixcmapShiftIntensity</a>(<a class="code" href="leptprotos_8h.html#a6c959f1c381ebe5a4abc867a3d8ae1e6">pixGetColormap</a>(pixb), <a class="code" href="blendcmaptest_8c.html#af468c1079b477fc16dbd689616ef060f">FADE_FRACTION</a>);
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="comment">/* Downscale the input */</span>
<a name="l00046"></a>00046 wb = <a class="code" href="leptprotos_8h.html#aa71e0b02548a56e723c76996ab145257">pixGetWidth</a>(pixb);
<a name="l00047"></a>00047 hb = <a class="code" href="leptprotos_8h.html#a511e60efcf1d9f3f59b5308ef5f49a06">pixGetHeight</a>(pixb);
<a name="l00048"></a>00048 pixt0 = <a class="code" href="leptprotos_8h.html#a225e9e08e47e8565e8d283a3c7662585">pixScaleToGray4</a>(pixs);
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="comment">/* Threshold to 5 levels, 4 bpp */</span>
<a name="l00051"></a>00051 ws = <a class="code" href="leptprotos_8h.html#aa71e0b02548a56e723c76996ab145257">pixGetWidth</a>(pixt0);
<a name="l00052"></a>00052 hs = <a class="code" href="leptprotos_8h.html#a511e60efcf1d9f3f59b5308ef5f49a06">pixGetHeight</a>(pixt0);
<a name="l00053"></a>00053 pixt1 = <a class="code" href="grayquant_8c.html#a3ceb912e2683196af6b07494dd3a40e4">pixThresholdTo4bpp</a>(pixt0, 5, 1);
<a name="l00054"></a>00054 <a class="code" href="leptprotos_8h.html#a08e3c51293e0ca20859055fedab8182d">pixDisplayWriteFormat</a>(pixt1, 1, <a class="code" href="imageio_8h.html#a726ca809ffd3d67ab4b8476646f26635a2ec77ead70eea85c6d7cc7372ea7394e">IFF_PNG</a>);
<a name="l00055"></a>00055 <a class="code" href="leptprotos_8h.html#a5f7e20d7f986e81b5caa47e38def8985">pixDisplayWrite</a>(pixb, 1);
<a name="l00056"></a>00056 cmap = <a class="code" href="leptprotos_8h.html#a6c959f1c381ebe5a4abc867a3d8ae1e6">pixGetColormap</a>(pixt1);
<a name="l00057"></a>00057 <a class="code" href="colormap_8c.html#a77f09e2f59d2cad941b416b118d256fe">pixcmapWriteStream</a>(stderr, cmap);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">/* Overwrite the white pixels (at sindex in pixt1) */</span>
<a name="l00060"></a>00060 <a class="code" href="colormap_8c.html#a9499bb0c006cc1b1467817af31ec7215">pixcmapGetIndex</a>(cmap, 255, 255, 255, &sindex);
<a name="l00061"></a>00061 delx = ws / <a class="code" href="blendcmaptest_8c.html#a4a9d32ff035c82119003134767948ebf">NX</a>;
<a name="l00062"></a>00062 dely = hs / <a class="code" href="blendcmaptest_8c.html#a652e87ecc9140879666ae9d6bf4ca893">NY</a>;
<a name="l00063"></a>00063 <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="blendcmaptest_8c.html#a652e87ecc9140879666ae9d6bf4ca893">NY</a>; i++) {
<a name="l00064"></a>00064 y = 20 + i * dely;
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (y >= hs + hb)
<a name="l00066"></a>00066 <span class="keywordflow">continue</span>;
<a name="l00067"></a>00067 <span class="keywordflow">for</span> (j = 0; j < <a class="code" href="blendcmaptest_8c.html#a4a9d32ff035c82119003134767948ebf">NX</a>; j++) {
<a name="l00068"></a>00068 x = 30 + j * delx;
<a name="l00069"></a>00069 y0 = y;
<a name="l00070"></a>00070 <span class="keywordflow">if</span> (j & 1) {
<a name="l00071"></a>00071 y0 = y + dely / 2;
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (y0 >= hs + hb)
<a name="l00073"></a>00073 <span class="keywordflow">continue</span>;
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075 <span class="keywordflow">if</span> (x >= ws + wb)
<a name="l00076"></a>00076 <span class="keywordflow">continue</span>;
<a name="l00077"></a>00077 <a class="code" href="blend_8c.html#ad4e4745c0c48b3ae04b988e21386d2f3">pixBlendCmap</a>(pixt1, pixb, x, y0, sindex);
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 <a class="code" href="leptprotos_8h.html#a08e3c51293e0ca20859055fedab8182d">pixDisplayWriteFormat</a>(pixt1, 1, <a class="code" href="imageio_8h.html#a726ca809ffd3d67ab4b8476646f26635a2ec77ead70eea85c6d7cc7372ea7394e">IFF_PNG</a>);
<a name="l00081"></a>00081 cmap = <a class="code" href="leptprotos_8h.html#a6c959f1c381ebe5a4abc867a3d8ae1e6">pixGetColormap</a>(pixt1);
<a name="l00082"></a>00082 <a class="code" href="colormap_8c.html#a77f09e2f59d2cad941b416b118d256fe">pixcmapWriteStream</a>(stderr, cmap);
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <a class="code" href="leptprotos_8h.html#a19758131737f1ef664bb58e9e4ee9ac3">pixDisplayMultiple</a>(<span class="stringliteral">"/tmp/junk_write_display*"</span>);
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <a class="code" href="leptprotos_8h.html#a1b238e61b64e4e5c62f44849cddb9658">pixDestroy</a>(&pixs);
<a name="l00087"></a>00087 <a class="code" href="leptprotos_8h.html#a1b238e61b64e4e5c62f44849cddb9658">pixDestroy</a>(&pixb);
<a name="l00088"></a>00088 <a class="code" href="leptprotos_8h.html#a1b238e61b64e4e5c62f44849cddb9658">pixDestroy</a>(&pixt0);
<a name="l00089"></a>00089 <a class="code" href="leptprotos_8h.html#a1b238e61b64e4e5c62f44849cddb9658">pixDestroy</a>(&pixt1);
<a name="l00090"></a>00090 <span class="keywordflow">return</span> 0;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
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