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<div class="title">jp2.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// This library is distributed under the conditions of the GNU LGPL.</span>
<a name="l00002"></a>00002 <span class="preprocessor">#include "config.h"</span>
<a name="l00003"></a>00003
<a name="l00004"></a>00004 <span class="preprocessor">#ifdef HAVE_SYS_TYPES_H</span>
<a name="l00005"></a>00005 <span class="preprocessor"></span><span class="preprocessor">#include <sys/types.h></span>
<a name="l00006"></a>00006 <span class="preprocessor">#endif</span>
<a name="l00007"></a>00007 <span class="preprocessor"></span>
<a name="l00008"></a>00008 <span class="preprocessor">#ifdef HAVE_JASPER</span>
<a name="l00009"></a>00009 <span class="preprocessor"></span>
<a name="l00010"></a>00010 <span class="preprocessor">#include "jp2.h"</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="preprocessor">#ifdef HAVE_STDINT_H</span>
<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#include <stdint.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#endif</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#include <ktempfile.h></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include <qcolor.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <qcstring.h></span>
<a name="l00018"></a>00018 <span class="preprocessor">#include <qfile.h></span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <qimage.h></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// dirty, but avoids a warning because jasper.h includes jas_config.h.</span>
<a name="l00022"></a>00022 <span class="preprocessor">#undef PACKAGE</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#undef VERSION</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#include <jasper/jasper.h></span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">// code taken in parts from JasPer's jiv.c</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#define DEFAULT_RATE 0.10</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define MAXCMPTS 256</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00033"></a>00033 jas_image_t* <a class="codeRef" href="qimageio.html#image">image</a>;
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keywordtype">int</span> cmptlut[MAXCMPTS];
<a name="l00036"></a>00036
<a name="l00037"></a>00037 jas_image_t* altimage;
<a name="l00038"></a>00038 } gs_t;
<a name="l00039"></a>00039
<a name="l00040"></a>00040
<a name="l00041"></a>00041 jas_image_t*
<a name="l00042"></a>00042 read_image( <span class="keyword">const</span> <a class="codeRef" href="qimageio.html">QImageIO</a>* io )
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 jas_stream_t* in = 0;
<a name="l00045"></a>00045 <span class="comment">// for QIODevice's other than QFile, a temp. file is used.</span>
<a name="l00046"></a>00046 KTempFile* tempf = 0;
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <a class="codeRef" href="qfile.html">QFile</a>* qf = 0;
<a name="l00049"></a>00049 <span class="keywordflow">if</span>( ( qf = dynamic_cast<QFile*>( io-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>() ) ) ) {
<a name="l00050"></a>00050 <span class="comment">// great, it's a QFile. Let's just take the filename.</span>
<a name="l00051"></a>00051 in = jas_stream_fopen( <a class="codeRef" href="qfile.html#encodeName">QFile::encodeName</a>( qf-><a class="codeRef" href="qfile.html#name">name</a>() ), <span class="stringliteral">"rb"</span> );
<a name="l00052"></a>00052 } <span class="keywordflow">else</span> {
<a name="l00053"></a>00053 <span class="comment">// not a QFile. Copy the whole data to a temp. file.</span>
<a name="l00054"></a>00054 tempf = <span class="keyword">new</span> KTempFile();
<a name="l00055"></a>00055 <span class="keywordflow">if</span>( tempf->status() != 0 ) {
<a name="l00056"></a>00056 <span class="keyword">delete</span> tempf;
<a name="l00057"></a>00057 <span class="keywordflow">return</span> 0;
<a name="l00058"></a>00058 } <span class="comment">// if</span>
<a name="l00059"></a>00059 tempf->setAutoDelete( <span class="keyword">true</span> );
<a name="l00060"></a>00060 <a class="codeRef" href="qfile.html">QFile</a>* out = tempf->file();
<a name="l00061"></a>00061 <span class="comment">// 4096 (=4k) is a common page size.</span>
<a name="l00062"></a>00062 <a class="codeRef" href="qbytearray.html">QByteArray</a> b( 4096 );
<a name="l00063"></a>00063 Q_LONG size;
<a name="l00064"></a>00064 <span class="comment">// 0 or -1 is EOF / error</span>
<a name="l00065"></a>00065 <span class="keywordflow">while</span>( ( size = io-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>()->readBlock( b.data(), 4096 ) ) > 0 ) {
<a name="l00066"></a>00066 <span class="comment">// in case of a write error, still give the decoder a try</span>
<a name="l00067"></a>00067 <span class="keywordflow">if</span>( ( out->writeBlock( b.data(), size ) ) == -1 ) <span class="keywordflow">break</span>;
<a name="l00068"></a>00068 } <span class="comment">// while</span>
<a name="l00069"></a>00069 <span class="comment">// flush everything out to disk</span>
<a name="l00070"></a>00070 out-><a class="codeRef" href="qfile.html#flush">flush</a>();
<a name="l00071"></a>00071
<a name="l00072"></a>00072 in = jas_stream_fopen( <a class="codeRef" href="qfile.html#encodeName">QFile::encodeName</a>( tempf->name() ), <span class="stringliteral">"rb"</span> );
<a name="l00073"></a>00073 } <span class="comment">// else</span>
<a name="l00074"></a>00074 <span class="keywordflow">if</span>( !in ) {
<a name="l00075"></a>00075 <span class="keyword">delete</span> tempf;
<a name="l00076"></a>00076 <span class="keywordflow">return</span> 0;
<a name="l00077"></a>00077 } <span class="comment">// if</span>
<a name="l00078"></a>00078
<a name="l00079"></a>00079 jas_image_t* image = jas_image_decode( in, -1, 0 );
<a name="l00080"></a>00080 jas_stream_close( in );
<a name="l00081"></a>00081 <span class="keyword">delete</span> tempf;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">// image may be 0, but that's Ok</span>
<a name="l00084"></a>00084 <span class="keywordflow">return</span> image;
<a name="l00085"></a>00085 } <span class="comment">// read_image</span>
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="keyword">static</span> <span class="keywordtype">bool</span>
<a name="l00088"></a>00088 convert_colorspace( gs_t& gs )
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 jas_cmprof_t *outprof = jas_cmprof_createfromclrspc( JAS_CLRSPC_SRGB );
<a name="l00091"></a>00091 <span class="keywordflow">if</span>( !outprof ) <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 gs.altimage = jas_image_chclrspc( gs.image, outprof,
<a name="l00094"></a>00094 JAS_CMXFORM_INTENT_PER );
<a name="l00095"></a>00095 <span class="keywordflow">if</span>( !gs.altimage ) <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00098"></a>00098 } <span class="comment">// convert_colorspace</span>
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keyword">static</span> <span class="keywordtype">bool</span>
<a name="l00101"></a>00101 render_view( gs_t& gs, <a class="codeRef" href="qimage.html">QImage</a>& qti )
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="keywordflow">if</span>((gs.cmptlut[0] = jas_image_getcmptbytype(gs.altimage,
<a name="l00104"></a>00104 JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
<a name="l00105"></a>00105 (gs.cmptlut[1] = jas_image_getcmptbytype(gs.altimage,
<a name="l00106"></a>00106 JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
<a name="l00107"></a>00107 (gs.cmptlut[2] = jas_image_getcmptbytype(gs.altimage,
<a name="l00108"></a>00108 JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
<a name="l00109"></a>00109 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00110"></a>00110 } <span class="comment">// if</span>
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keyword">const</span> <span class="keywordtype">int</span>* cmptlut = gs.cmptlut;
<a name="l00113"></a>00113 <span class="keywordtype">int</span> v[3];
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">// check that all components have the same size.</span>
<a name="l00116"></a>00116 <span class="keyword">const</span> <span class="keywordtype">int</span> width = jas_image_cmptwidth( gs.altimage, cmptlut[0] );
<a name="l00117"></a>00117 <span class="keyword">const</span> <span class="keywordtype">int</span> height = jas_image_cmptheight( gs.altimage, cmptlut[0] );
<a name="l00118"></a>00118 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> i = 1; i < 3; ++i ) {
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (jas_image_cmptwidth( gs.altimage, cmptlut[i] ) != width ||
<a name="l00120"></a>00120 jas_image_cmptheight( gs.altimage, cmptlut[i] ) != height)
<a name="l00121"></a>00121 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00122"></a>00122 } <span class="comment">// for</span>
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">if</span>( !qti.<a class="codeRef" href="qimage.html#create">create</a>( jas_image_width( gs.altimage ),
<a name="l00125"></a>00125 jas_image_height( gs.altimage ), 32 ) )
<a name="l00126"></a>00126 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00127"></a>00127
<a name="l00128"></a>00128 uint32_t* data = (uint32_t*)qti.<a class="codeRef" href="qimage.html#bits">bits</a>();
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> y = 0; y < height; ++y ) {
<a name="l00131"></a>00131 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> x = 0; x < width; ++x ) {
<a name="l00132"></a>00132 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> k = 0; k < 3; ++k ) {
<a name="l00133"></a>00133 v[k] = jas_image_readcmptsample( gs.altimage, cmptlut[k], x, y );
<a name="l00134"></a>00134 <span class="comment">// if the precision of the component is too small, increase</span>
<a name="l00135"></a>00135 <span class="comment">// it to use the complete value range.</span>
<a name="l00136"></a>00136 v[k] <<= 8 - jas_image_cmptprec( gs.altimage, cmptlut[k] );
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">if</span>( v[k] < 0 ) v[k] = 0;
<a name="l00139"></a>00139 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( v[k] > 255 ) v[k] = 255;
<a name="l00140"></a>00140 } <span class="comment">// for k</span>
<a name="l00141"></a>00141
<a name="l00142"></a>00142 *data++ = qRgb( v[0], v[1], v[2] );
<a name="l00143"></a>00143 } <span class="comment">// for x</span>
<a name="l00144"></a>00144 } <span class="comment">// for y</span>
<a name="l00145"></a>00145 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00146"></a>00146 } <span class="comment">// render_view</span>
<a name="l00147"></a>00147
<a name="l00148"></a>00148
<a name="l00149"></a>00149 KDE_EXPORT <span class="keywordtype">void</span>
<a name="l00150"></a>00150 kimgio_jp2_read( <a class="codeRef" href="qimageio.html">QImageIO</a>* io )
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 <span class="keywordflow">if</span>( jas_init() ) <span class="keywordflow">return</span>;
<a name="l00153"></a>00153
<a name="l00154"></a>00154 gs_t gs;
<a name="l00155"></a>00155 <span class="keywordflow">if</span>( !(gs.image = read_image( io )) ) <span class="keywordflow">return</span>;
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keywordflow">if</span>( !convert_colorspace( gs ) ) <span class="keywordflow">return</span>;
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <a class="codeRef" href="qimage.html">QImage</a> image;
<a name="l00160"></a>00160 render_view( gs, image );
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keywordflow">if</span>( gs.image ) jas_image_destroy( gs.image );
<a name="l00163"></a>00163 <span class="keywordflow">if</span>( gs.altimage ) jas_image_destroy( gs.altimage );
<a name="l00164"></a>00164
<a name="l00165"></a>00165 io-><a class="codeRef" href="qimageio.html#setImage">setImage</a>( image );
<a name="l00166"></a>00166 io-><a class="codeRef" href="qimageio.html#setStatus">setStatus</a>( 0 );
<a name="l00167"></a>00167 } <span class="comment">// kimgio_jp2_read</span>
<a name="l00168"></a>00168
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keyword">static</span> jas_image_t*
<a name="l00171"></a>00171 create_image( <span class="keyword">const</span> <a class="codeRef" href="qimage.html">QImage</a>& qi )
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 <span class="comment">// prepare the component parameters</span>
<a name="l00174"></a>00174 jas_image_cmptparm_t* cmptparms = <span class="keyword">new</span> jas_image_cmptparm_t[ 3 ];
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < 3; ++i ) {
<a name="l00177"></a>00177 <span class="comment">// x and y offset</span>
<a name="l00178"></a>00178 cmptparms[i].tlx = 0;
<a name="l00179"></a>00179 cmptparms[i].tly = 0;
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">// the resulting image will be hstep*width x vstep*height !</span>
<a name="l00182"></a>00182 cmptparms[i].hstep = 1;
<a name="l00183"></a>00183 cmptparms[i].vstep = 1;
<a name="l00184"></a>00184 cmptparms[i].width = qi.<a class="codeRef" href="qimage.html#width">width</a>();
<a name="l00185"></a>00185 cmptparms[i].height = qi.<a class="codeRef" href="qimage.html#height">height</a>();
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="comment">// we write everything as 24bit truecolor ATM</span>
<a name="l00188"></a>00188 cmptparms[i].prec = 8;
<a name="l00189"></a>00189 cmptparms[i].sgnd = <span class="keyword">false</span>;
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 jas_image_t* ji = jas_image_create( 3 <span class="comment">/* number components */</span>, cmptparms, JAS_CLRSPC_UNKNOWN );
<a name="l00193"></a>00193 <span class="keyword">delete</span>[] cmptparms;
<a name="l00194"></a>00194
<a name="l00195"></a>00195 <span class="comment">// returning 0 is ok</span>
<a name="l00196"></a>00196 <span class="keywordflow">return</span> ji;
<a name="l00197"></a>00197 } <span class="comment">// create_image</span>
<a name="l00198"></a>00198
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keyword">static</span> <span class="keywordtype">bool</span>
<a name="l00201"></a>00201 write_components( jas_image_t* ji, <span class="keyword">const</span> <a class="codeRef" href="qimage.html">QImage</a>& qi )
<a name="l00202"></a>00202 {
<a name="l00203"></a>00203 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> height = qi.<a class="codeRef" href="qimage.html#height">height</a>();
<a name="l00204"></a>00204 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> width = qi.<a class="codeRef" href="qimage.html#width">width</a>();
<a name="l00205"></a>00205
<a name="l00206"></a>00206 jas_matrix_t* m = jas_matrix_create( height, width );
<a name="l00207"></a>00207 <span class="keywordflow">if</span>( !m ) <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00208"></a>00208
<a name="l00209"></a>00209 jas_image_setclrspc( ji, JAS_CLRSPC_SRGB );
<a name="l00210"></a>00210
<a name="l00211"></a>00211 jas_image_setcmpttype( ji, 0, JAS_IMAGE_CT_RGB_R );
<a name="l00212"></a>00212 <span class="keywordflow">for</span>( uint y = 0; y < height; ++y )
<a name="l00213"></a>00213 <span class="keywordflow">for</span>( uint x = 0; x < width; ++x )
<a name="l00214"></a>00214 jas_matrix_set( m, y, x, qRed( qi.<a class="codeRef" href="qimage.html#pixel">pixel</a>( x, y ) ) );
<a name="l00215"></a>00215 jas_image_writecmpt( ji, 0, 0, 0, width, height, m );
<a name="l00216"></a>00216
<a name="l00217"></a>00217 jas_image_setcmpttype( ji, 1, JAS_IMAGE_CT_RGB_G );
<a name="l00218"></a>00218 <span class="keywordflow">for</span>( uint y = 0; y < height; ++y )
<a name="l00219"></a>00219 <span class="keywordflow">for</span>( uint x = 0; x < width; ++x )
<a name="l00220"></a>00220 jas_matrix_set( m, y, x, qGreen( qi.<a class="codeRef" href="qimage.html#pixel">pixel</a>( x, y ) ) );
<a name="l00221"></a>00221 jas_image_writecmpt( ji, 1, 0, 0, width, height, m );
<a name="l00222"></a>00222
<a name="l00223"></a>00223 jas_image_setcmpttype( ji, 2, JAS_IMAGE_CT_RGB_B );
<a name="l00224"></a>00224 <span class="keywordflow">for</span>( uint y = 0; y < height; ++y )
<a name="l00225"></a>00225 <span class="keywordflow">for</span>( uint x = 0; x < width; ++x )
<a name="l00226"></a>00226 jas_matrix_set( m, y, x, qBlue( qi.<a class="codeRef" href="qimage.html#pixel">pixel</a>( x, y ) ) );
<a name="l00227"></a>00227 jas_image_writecmpt( ji, 2, 0, 0, width, height, m );
<a name="l00228"></a>00228 jas_matrix_destroy( m );
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00231"></a>00231 } <span class="comment">// write_components</span>
<a name="l00232"></a>00232
<a name="l00233"></a>00233 KDE_EXPORT <span class="keywordtype">void</span>
<a name="l00234"></a>00234 kimgio_jp2_write( <a class="codeRef" href="qimageio.html">QImageIO</a>* io )
<a name="l00235"></a>00235 {
<a name="l00236"></a>00236 <span class="keywordflow">if</span>( jas_init() ) <span class="keywordflow">return</span>;
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="comment">// open the stream. we write directly to the file if possible, to a</span>
<a name="l00239"></a>00239 <span class="comment">// temporary file otherwise.</span>
<a name="l00240"></a>00240 jas_stream_t* stream = 0;
<a name="l00241"></a>00241
<a name="l00242"></a>00242 <a class="codeRef" href="qfile.html">QFile</a>* qf = 0;
<a name="l00243"></a>00243 KTempFile* ktempf = 0;
<a name="l00244"></a>00244 <span class="keywordflow">if</span>( ( qf = dynamic_cast<QFile*>( io-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>() ) ) ) {
<a name="l00245"></a>00245 <span class="comment">// jas_stream_fdopen works here, but not when reading...</span>
<a name="l00246"></a>00246 stream = jas_stream_fdopen( dup( qf-><a class="codeRef" href="qfile.html#handle">handle</a>() ), <span class="stringliteral">"w"</span> );
<a name="l00247"></a>00247 } <span class="keywordflow">else</span> {
<a name="l00248"></a>00248 ktempf = <span class="keyword">new</span> KTempFile;
<a name="l00249"></a>00249 ktempf->setAutoDelete( <span class="keyword">true</span> );
<a name="l00250"></a>00250 stream = jas_stream_fdopen( dup( ktempf->handle()), <span class="stringliteral">"w"</span> );
<a name="l00251"></a>00251 } <span class="comment">// else</span>
<a name="l00252"></a>00252
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="comment">// by here, a jas_stream_t is open</span>
<a name="l00255"></a>00255 <span class="keywordflow">if</span>( !stream ) <span class="keywordflow">return</span>;
<a name="l00256"></a>00256
<a name="l00257"></a>00257 jas_image_t* ji = create_image( io-><a class="codeRef" href="qimageio.html#image">image</a>() );
<a name="l00258"></a>00258 <span class="keywordflow">if</span>( !ji ) {
<a name="l00259"></a>00259 <span class="keyword">delete</span> ktempf;
<a name="l00260"></a>00260 jas_stream_close( stream );
<a name="l00261"></a>00261 <span class="keywordflow">return</span>;
<a name="l00262"></a>00262 } <span class="comment">// if</span>
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="keywordflow">if</span>( !write_components( ji, io-><a class="codeRef" href="qimageio.html#image">image</a>() ) ) {
<a name="l00265"></a>00265 <span class="keyword">delete</span> ktempf;
<a name="l00266"></a>00266 jas_stream_close( stream );
<a name="l00267"></a>00267 jas_image_destroy( ji );
<a name="l00268"></a>00268 <span class="keywordflow">return</span>;
<a name="l00269"></a>00269 } <span class="comment">// if</span>
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="comment">// optstr:</span>
<a name="l00272"></a>00272 <span class="comment">// - rate=#B => the resulting file size is about # bytes</span>
<a name="l00273"></a>00273 <span class="comment">// - rate=0.0 .. 1.0 => the resulting file size is about the factor times</span>
<a name="l00274"></a>00274 <span class="comment">// the uncompressed size</span>
<a name="l00275"></a>00275 <a class="codeRef" href="qstring.html">QString</a> rate;
<a name="l00276"></a>00276 <a class="codeRef" href="qtextstream.html">QTextStream</a> ts( &rate, IO_WriteOnly );
<a name="l00277"></a>00277 ts << <span class="stringliteral">"rate="</span>
<a name="l00278"></a>00278 << ( (io-><a class="codeRef" href="qimageio.html#quality">quality</a>() < 0) ? DEFAULT_RATE : io-><a class="codeRef" href="qimageio.html#quality">quality</a>() / 100.0F );
<a name="l00279"></a>00279 <span class="keywordtype">int</span> i = jp2_encode( ji, stream, rate.<a class="codeRef" href="qstring.html#utf8">utf8</a>().data() );
<a name="l00280"></a>00280
<a name="l00281"></a>00281 jas_image_destroy( ji );
<a name="l00282"></a>00282 jas_stream_close( stream );
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="keywordflow">if</span>( i != 0 ) { <span class="keyword">delete</span> ktempf; <span class="keywordflow">return</span>; }
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <span class="keywordflow">if</span>( ktempf ) {
<a name="l00287"></a>00287 <span class="comment">// We've written to a tempfile. Copy the data to the final destination.</span>
<a name="l00288"></a>00288 <a class="codeRef" href="qfile.html">QFile</a>* in = ktempf->file();
<a name="l00289"></a>00289
<a name="l00290"></a>00290 <a class="codeRef" href="qbytearray.html">QByteArray</a> b( 4096 );
<a name="l00291"></a>00291 Q_LONG size;
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="comment">// seek to the beginning of the file.</span>
<a name="l00294"></a>00294 <span class="keywordflow">if</span>( !in->at( 0 ) ) { <span class="keyword">delete</span> ktempf; <span class="keywordflow">return</span>; }
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="comment">// 0 or -1 is EOF / error</span>
<a name="l00297"></a>00297 <span class="keywordflow">while</span>( ( size = in->readBlock( b.data(), 4096 ) ) > 0 ) {
<a name="l00298"></a>00298 <span class="keywordflow">if</span>( ( io-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>()->writeBlock( b.data(), size ) ) == -1 ) {
<a name="l00299"></a>00299 <span class="keyword">delete</span> ktempf;
<a name="l00300"></a>00300 <span class="keywordflow">return</span>;
<a name="l00301"></a>00301 } <span class="comment">// if</span>
<a name="l00302"></a>00302 } <span class="comment">// while</span>
<a name="l00303"></a>00303 io-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>()->flush();
<a name="l00304"></a>00304 <span class="keyword">delete</span> ktempf;
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <span class="comment">// see if we've left the while loop due to an error.</span>
<a name="l00307"></a>00307 <span class="keywordflow">if</span>( size == -1 ) <span class="keywordflow">return</span>;
<a name="l00308"></a>00308 } <span class="comment">// if</span>
<a name="l00309"></a>00309
<a name="l00310"></a>00310
<a name="l00311"></a>00311 <span class="comment">// everything went fine</span>
<a name="l00312"></a>00312 io-><a class="codeRef" href="qimageio.html#setStatus">setStatus</a>( IO_Ok );
<a name="l00313"></a>00313 } <span class="comment">// kimgio_jp2_write</span>
<a name="l00314"></a>00314
<a name="l00315"></a>00315 <span class="preprocessor">#endif // HAVE_JASPER</span>
<a name="l00316"></a>00316 <span class="preprocessor"></span>
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