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<h1>/home/paul/dev/cegui/release_tmp/release_tmp/src/loaders/SILLYJPGImageLoader.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/***********************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> filename: SILLYJPGImageLoader.cpp</span>
<a name="l00003"></a>00003 <span class="comment"> created: 11 Jun 2006</span>
<a name="l00004"></a>00004 <span class="comment"> author: Olivier Delannoy </span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> purpose: Definition of JPGImageLoader methods </span>
<a name="l00007"></a>00007 <span class="comment">*************************************************************************/</span>
<a name="l00008"></a>00008 <span class="comment">/***************************************************************************</span>
<a name="l00009"></a>00009 <span class="comment"> * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span>
<a name="l00012"></a>00012 <span class="comment"> * a copy of this software and associated documentation files (the</span>
<a name="l00013"></a>00013 <span class="comment"> * "Software"), to deal in the Software without restriction, including</span>
<a name="l00014"></a>00014 <span class="comment"> * without limitation the rights to use, copy, modify, merge, publish,</span>
<a name="l00015"></a>00015 <span class="comment"> * distribute, sublicense, and/or sell copies of the Software, and to</span>
<a name="l00016"></a>00016 <span class="comment"> * permit persons to whom the Software is furnished to do so, subject to</span>
<a name="l00017"></a>00017 <span class="comment"> * the following conditions:</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> * The above copyright notice and this permission notice shall be</span>
<a name="l00020"></a>00020 <span class="comment"> * included in all copies or substantial portions of the Software.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
<a name="l00023"></a>00023 <span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
<a name="l00024"></a>00024 <span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span>
<a name="l00025"></a>00025 <span class="comment"> * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR</span>
<a name="l00026"></a>00026 <span class="comment"> * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,</span>
<a name="l00027"></a>00027 <span class="comment"> * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR</span>
<a name="l00028"></a>00028 <span class="comment"> * OTHER DEALINGS IN THE SOFTWARE.</span>
<a name="l00029"></a>00029 <span class="comment"> ***************************************************************************/</span>
<a name="l00030"></a>00030 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#include <config.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#endif</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include "loaders/SILLYJPGImageLoader.h"</span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="preprocessor">#ifndef SILLY_OPT_INLINE</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define inline </span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#include "loaders/SILLYJPGImageLoader.icpp"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#undef inline</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span><span class="preprocessor">#include "loaders/SILLYJPGImageContext.h"</span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="comment">// Start section of namespace SILLY</span>
<a name="l00044"></a>00044 <span class="keyword">namespace </span>SILLY
<a name="l00045"></a>00045 {
<a name="l00046"></a><a class="code" href="a00120.html#ee42fb30accf60c055915f7a5610df39">00046</a> <a class="code" href="a00120.html#ee42fb30accf60c055915f7a5610df39">JPGImageLoader::JPGImageLoader</a>()
<a name="l00047"></a>00047 : <a class="code" href="a00117.html">ImageLoader</a>(<span class="stringliteral">"JPG Image Loader based on jpeg-6b"</span>)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050
<a name="l00051"></a><a class="code" href="a00120.html#0ada3f9bdbbd74ee205788f90de02871">00051</a> <a class="code" href="a00120.html#0ada3f9bdbbd74ee205788f90de02871">JPGImageLoader::~JPGImageLoader</a>()
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055
<a name="l00056"></a><a class="code" href="a00120.html#0c7f841ff3a831b1ae05401ad96cb018">00056</a> <a class="code" href="a00116.html">ImageContext</a>* <a class="code" href="a00120.html#0c7f841ff3a831b1ae05401ad96cb018">JPGImageLoader::loadHeader</a>(<a class="code" href="a00168.html#2f8e63a7cc51f96526c3e81712b64890">PixelFormat</a>& formatSource, <a class="code" href="a00113.html">DataSource</a>* data)
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <a class="code" href="a00119.html">JPGImageContext</a>* jpg = <span class="keyword">new</span> <a class="code" href="a00119.html">JPGImageContext</a>;
<a name="l00059"></a>00059 jpg-><a class="code" href="a00119.html#8b95f1174253c5044bf2c5cf17c33e47">d_source</a> = data;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (! jpg)
<a name="l00062"></a>00062 <span class="keywordflow">return</span> 0;
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (setjmp(jpg-><a class="code" href="a00119.html#cf7d5f4595d2b61f0a5d3dedba18b8ec">setjmp_buffer</a>))
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keyword">delete</span> jpg;
<a name="l00066"></a>00066 <span class="keywordflow">return</span> 0;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 jpeg_read_header(&(jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>), TRUE);
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (! jpeg_start_decompress(&(jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>)))
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="keyword">delete</span> jpg;
<a name="l00072"></a>00072 <span class="keywordflow">return</span> 0;
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keywordflow">if</span> (jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_components != 1 && jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_components != 3)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 printf(<span class="stringliteral">"JPG unsupported bpp: %d\n"</span>, jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_components );
<a name="l00079"></a>00079 jpeg_finish_decompress(& jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>);
<a name="l00080"></a>00080 <span class="keyword">delete</span> jpg;
<a name="l00081"></a>00081 <span class="keywordflow">return</span> 0;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 formatSource = PF_RGB; <span class="comment">// It's not true but we handle both the same way</span>
<a name="l00084"></a>00084 <span class="comment">//printf("Image info: size: %dx%d - bpp: %d\n", jpg->cinfo.output_width, jpg->cinfo.output_height, jpg->cinfo.output_components);</span>
<a name="l00085"></a>00085
<a name="l00086"></a>00086 jpg-><a class="code" href="a00119.html#1933030eb30a6d5c198a768d8e4fef86">setImageSize</a>();
<a name="l00087"></a>00087 <span class="keywordflow">return</span> jpg;
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a><a class="code" href="a00120.html#aaadc333060f75e71f11a89128d9a350">00090</a> <span class="keywordtype">bool</span> <a class="code" href="a00120.html#aaadc333060f75e71f11a89128d9a350">JPGImageLoader::loadImageData</a>(<a class="code" href="a00168.html#591746ccd8c678870692cbf1cb302d6a">PixelOrigin</a> origin,
<a name="l00091"></a>00091 <a class="code" href="a00113.html">DataSource</a>* data,
<a name="l00092"></a>00092 <a class="code" href="a00116.html">ImageContext</a>* context)
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <a class="code" href="a00119.html">JPGImageContext</a>* jpg = static_cast<JPGImageContext*>(context);
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// Allocate a buffer </span>
<a name="l00097"></a>00097 <span class="keywordtype">int</span> row_stride = jpg-><a class="code" href="a00116.html#a631da5da7b11ecc0723a48501ae91c6">getWidth</a>() * jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_components;
<a name="l00098"></a>00098 JSAMPARRAY buffer = (* jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.mem->alloc_sarray)(
<a name="l00099"></a>00099 (j_common_ptr)(& jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>),
<a name="l00100"></a>00100 JPOOL_IMAGE,
<a name="l00101"></a>00101 row_stride,
<a name="l00102"></a>00102 1);
<a name="l00103"></a>00103 <span class="keywordtype">bool</span> finished = <span class="keyword">true</span>;
<a name="l00104"></a>00104 size_t height = jpg-><a class="code" href="a00116.html#eb0ccdda69dac79dcc96f1ebe4159973">getHeight</a>();
<a name="l00105"></a>00105 size_t width = jpg-><a class="code" href="a00116.html#a631da5da7b11ecc0723a48501ae91c6">getWidth</a>();
<a name="l00106"></a>00106
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">while</span>(jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_scanline < height)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="keywordtype">int</span> num_rows = jpeg_read_scanlines(& jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>, buffer, 1);
<a name="l00111"></a>00111 <span class="keywordflow">if</span> (num_rows != 1)
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 jpeg_finish_decompress(& jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>);
<a name="l00114"></a>00114 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 <a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a> red;
<a name="l00117"></a>00117 <a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a> green;
<a name="l00118"></a>00118 <a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a> blue;
<a name="l00119"></a>00119 <span class="keyword">const</span> <a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a> alpha = 0xff;
<a name="l00120"></a>00120 <a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a>* in = (<a class="code" href="a00168.html#ea185528b70b44efcecbc49855184018">byte</a>*)(*buffer);
<a name="l00121"></a>00121 <span class="comment">// Grayscale image </span>
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>.output_components == 1)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="keywordflow">for</span>(size_t i = 0 ; i < width * num_rows ; ++i)
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 red = *in;
<a name="l00127"></a>00127 green = *in;
<a name="l00128"></a>00128 blue = *in;
<a name="l00129"></a>00129 jpg-><a class="code" href="a00116.html#acc0cfe8dfb001303b42ae29e07f74c1">setNextPixel</a>(red, green, blue, alpha);
<a name="l00130"></a>00130 in += 1;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 <span class="comment">// RGB image </span>
<a name="l00134"></a>00134 <span class="keywordflow">else</span>
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="keywordflow">for</span>(size_t i = 0 ; i < width * num_rows ; ++i)
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 red = *(in++);
<a name="l00139"></a>00139 green = *(in++);
<a name="l00140"></a>00140 blue = *(in++);
<a name="l00141"></a>00141 jpg-><a class="code" href="a00116.html#acc0cfe8dfb001303b42ae29e07f74c1">setNextPixel</a>(red, green, blue, alpha);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 jpeg_finish_decompress(& jpg-><a class="code" href="a00119.html#687e7db69d3f2fbee914af8f319d1a1f">cinfo</a>);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keywordflow">if</span> (origin == PO_BOTTOM_LEFT)
<a name="l00148"></a>00148 <span class="keywordflow">return</span> jpg-><a class="code" href="a00116.html#7563da222c2228f6af6a2b4fc00f85cb">flipVertically</a>();
<a name="l00149"></a>00149 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151
<a name="l00152"></a>00152
<a name="l00153"></a>00153
<a name="l00154"></a>00154
<a name="l00155"></a>00155
<a name="l00156"></a>00156
<a name="l00157"></a>00157 } <span class="comment">// End section of namespace SILLY </span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Nov 5 14:38:42 2006 for Simple Image Loading LibrarY by
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