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<h1>csgfx/quantize.h</h1><a href="quantize_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>
<a name="l00002"></a>00002 <span class="comment"> RGB to paletted image quantization routine</span>
<a name="l00003"></a>00003 <span class="comment"> Copyright (C) 2000 by Andrew Zabolotny <bit@eltech.ru></span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00006"></a>00006 <span class="comment"> modify it under the terms of the GNU Library General Public</span>
<a name="l00007"></a>00007 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00008"></a>00008 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00011"></a>00011 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00012"></a>00012 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00013"></a>00013 <span class="comment"> Library General Public License for more details.</span>
<a name="l00014"></a>00014 <span class="comment"></span>
<a name="l00015"></a>00015 <span class="comment"> You should have received a copy of the GNU Library General Public</span>
<a name="l00016"></a>00016 <span class="comment"> License along with this library; if not, write to the Free</span>
<a name="l00017"></a>00017 <span class="comment"> Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</span>
<a name="l00018"></a>00018 <span class="comment">*/</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#ifndef __CS_QUANTIZE_H__</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define __CS_QUANTIZE_H__</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include "csextern.h"</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="rgbpixel_8h.html" title="RGB colors.">csgfx/rgbpixel.h</a>"</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">struct </span>csColorBox;
<a name="l00036"></a>00036
<a name="l00129"></a><a class="code" href="classcsColorQuantizer.html">00129</a> <span class="keyword">class </span>CS_CRYSTALSPACE_EXPORT <a class="code" href="classcsColorQuantizer.html" title="Color quantizer.">csColorQuantizer</a>
<a name="l00130"></a>00130 {
<a name="l00131"></a>00131 <span class="keyword">private</span>:
<a name="l00132"></a><a class="code" href="classcsColorQuantizer.html#91ce807a34273beb4a3f93fae8416ece">00132</a> <span class="keyword">friend</span> <span class="keyword">struct </span>csColorBox;
<a name="l00133"></a>00133 <span class="keyword">struct </span>ColorIndex
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 <span class="keywordtype">int</span> index;
<a name="l00136"></a>00136 csColorBox* box;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 ColorIndex() : box(0) {}
<a name="l00139"></a>00139 };
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// The storage for color usage histogram.</span>
<a name="l00142"></a>00142 <a class="code" href="group__util.html#g05f6b0ae8f6a6e135b0e290c25fe0e4e" title="unsigned 16-bit integer (0..65 535)">uint16</a> *hist;
<a name="l00143"></a>00143 <span class="comment">// Total number of colors that were used to create the histogram.</span>
<a name="l00144"></a>00144 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> hist_pixels;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">// The storage for color space boxes.</span>
<a name="l00147"></a>00147 csColorBox *box;
<a name="l00148"></a>00148 <span class="comment">// Number of valid color boxes.</span>
<a name="l00149"></a>00149 <span class="keywordtype">int</span> boxcount;
<a name="l00150"></a>00150 <span class="comment">// The storage for color indices.</span>
<a name="l00151"></a>00151 ColorIndex* color_index;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">// The state of quantization variables</span>
<a name="l00154"></a>00154 <span class="keyword">enum</span>
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="comment">// Uninitialized: initial state</span>
<a name="l00157"></a>00157 qsNone,
<a name="l00158"></a>00158 <span class="comment">// Counting color frequencies</span>
<a name="l00159"></a>00159 qsCount,
<a name="l00160"></a>00160 <span class="comment">// Remapping input images to output</span>
<a name="l00161"></a>00161 qsRemap
<a name="l00162"></a>00162 } qState;
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keyword">static</span> <span class="keywordtype">int</span> compare_boxes (<span class="keyword">const</span> <span class="keywordtype">void</span> *i1, <span class="keyword">const</span> <span class="keywordtype">void</span> *i2);
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="keyword">public</span>:
<a name="l00168"></a>00168 <a class="code" href="classcsColorQuantizer.html" title="Color quantizer.">csColorQuantizer</a> ();
<a name="l00170"></a>00170 ~<a class="code" href="classcsColorQuantizer.html" title="Color quantizer.">csColorQuantizer</a> ();
<a name="l00171"></a>00171
<a name="l00194"></a>00194 <span class="keywordtype">void</span> DoRGB (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *image, <span class="keywordtype">int</span> pixels, <span class="keywordtype">int</span> pixperline,
<a name="l00195"></a>00195 <a class="code" href="group__util.html#gdde6aaee8457bee49c2a92621fe22b79" title="unsigned 8-bit integer (0..255)">uint8</a> *&outimage, <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *&outpalette, <span class="keywordtype">int</span> &maxcolors, <span class="keywordtype">bool</span> dither);
<a name="l00196"></a>00196
<a name="l00198"></a>00198 <span class="keywordtype">void</span> Begin ();
<a name="l00200"></a>00200 <span class="keywordtype">void</span> End ();
<a name="l00202"></a>00202 <span class="keywordtype">void</span> Count (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *image, <span class="keywordtype">int</span> pixels, <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *transp = 0);
<a name="l00204"></a>00204 <span class="keywordtype">void</span> Bias (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *colors, <span class="keywordtype">int</span> count, <span class="keywordtype">int</span> weight);
<a name="l00206"></a>00206 <span class="keywordtype">void</span> Palette (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *&outpalette, <span class="keywordtype">int</span> &maxcolors,
<a name="l00207"></a>00207 <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *transp = 0);
<a name="l00209"></a>00209 <span class="keywordtype">void</span> Remap (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *image, <span class="keywordtype">int</span> pixels, <a class="code" href="group__util.html#gdde6aaee8457bee49c2a92621fe22b79" title="unsigned 8-bit integer (0..255)">uint8</a> *&outimage,
<a name="l00210"></a>00210 <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *transp = 0);
<a name="l00212"></a>00212 <span class="keywordtype">void</span> RemapDither (<a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *image, <span class="keywordtype">int</span> pixels, <span class="keywordtype">int</span> pixperline,
<a name="l00213"></a>00213 <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *palette, <span class="keywordtype">int</span> colors, <a class="code" href="group__util.html#gdde6aaee8457bee49c2a92621fe22b79" title="unsigned 8-bit integer (0..255)">uint8</a> *&outimage,
<a name="l00214"></a>00214 <a class="code" href="structcsRGBpixel.html" title="An RGB pixel.">csRGBpixel</a> *transp = 0);
<a name="l00215"></a>00215 };
<a name="l00216"></a>00216
<a name="l00219"></a>00219 <span class="preprocessor">#endif // __CS_QUANTIZE_H__</span>
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