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<div class="title">xview.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Oliver Eiden <o.eiden@pop.ruhr.de></span>
<a name="l00002"></a>00002 <span class="comment">// 23.3.99</span>
<a name="l00003"></a>00003 <span class="comment">// changed the mapping from 3-3-2 decoded pixels to 8-8-8 decoded true-color pixels</span>
<a name="l00004"></a>00004 <span class="comment">// now it uses the same mapping as xv, this leads to better visual results</span>
<a name="l00005"></a>00005 <span class="comment">// Patch merged in HEAD by Chris Spiegel <matrix@xirtam.org></span>
<a name="l00006"></a>00006 <span class="comment">// This library is distributed under the conditions of the GNU LGPL.</span>
<a name="l00007"></a>00007
<a name="l00008"></a>00008 <span class="preprocessor">#include <stdio.h></span>
<a name="l00009"></a>00009 <span class="preprocessor">#include <string.h></span>
<a name="l00010"></a>00010 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00011"></a>00011 <span class="preprocessor">#include <qimage.h></span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#include <kdelibs_export.h></span>
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="preprocessor">#include "xview.h"</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#define BUFSIZE 1024</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span>
<a name="l00019"></a>00019 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> b_255_3[]= {0,85,170,255}, <span class="comment">// index*255/3</span>
<a name="l00020"></a>00020 rg_255_7[]={0,36,72,109,145,182,218,255}; <span class="comment">// index *255/7</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 KDE_EXPORT <span class="keywordtype">void</span> kimgio_xv_read( <a class="codeRef" href="qimageio.html">QImageIO</a> *_imageio )
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024 <span class="keywordtype">int</span> x=-1;
<a name="l00025"></a>00025 <span class="keywordtype">int</span> y=-1;
<a name="l00026"></a>00026 <span class="keywordtype">int</span> maxval=-1;
<a name="l00027"></a>00027 <a class="codeRef" href="qiodevice.html">QIODevice</a> *iodev = _imageio-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>();
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keywordtype">char</span> str[ BUFSIZE ];
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">// magic number must be "P7 332"</span>
<a name="l00032"></a>00032 iodev-><a class="codeRef" href="qiodevice.html#readLine">readLine</a>( str, BUFSIZE );
<a name="l00033"></a>00033 <span class="keywordflow">if</span> (strncmp(str,<span class="stringliteral">"P7 332"</span>,6)) <span class="keywordflow">return</span>;
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">// next line #XVVERSION</span>
<a name="l00036"></a>00036 iodev-><a class="codeRef" href="qiodevice.html#readLine">readLine</a>( str, BUFSIZE );
<a name="l00037"></a>00037 <span class="keywordflow">if</span> (strncmp(str, <span class="stringliteral">"#XVVERSION"</span>, 10))
<a name="l00038"></a>00038 <span class="keywordflow">return</span>;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// now it gets interesting, #BUILTIN means we are out.</span>
<a name="l00041"></a>00041 <span class="comment">// if IMGINFO comes, we are happy!</span>
<a name="l00042"></a>00042 iodev-><a class="codeRef" href="qiodevice.html#readLine">readLine</a>( str, BUFSIZE );
<a name="l00043"></a>00043 <span class="keywordflow">if</span> (strncmp(str, <span class="stringliteral">"#IMGINFO:"</span>, 9))
<a name="l00044"></a>00044 <span class="keywordflow">return</span>;
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">// after this an #END_OF_COMMENTS signals everything to be ok!</span>
<a name="l00047"></a>00047 iodev-><a class="codeRef" href="qiodevice.html#readLine">readLine</a>( str, BUFSIZE );
<a name="l00048"></a>00048 <span class="keywordflow">if</span> (strncmp(str, <span class="stringliteral">"#END_OF"</span>, 7))
<a name="l00049"></a>00049 <span class="keywordflow">return</span>;
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">// now a last line with width, height, maxval which is </span>
<a name="l00052"></a>00052 <span class="comment">// supposed to be 255</span>
<a name="l00053"></a>00053 iodev-><a class="codeRef" href="qiodevice.html#readLine">readLine</a>( str, BUFSIZE );
<a name="l00054"></a>00054 sscanf(str, <span class="stringliteral">"%d %d %d"</span>, &x, &y, &maxval);
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (maxval != 255) <span class="keywordflow">return</span>;
<a name="l00057"></a>00057 <span class="keywordtype">int</span> blocksize = x*y;
<a name="l00058"></a>00058 <span class="keywordflow">if</span>(x < 0 || y < 0 || blocksize < x || blocksize < y)
<a name="l00059"></a>00059 <span class="keywordflow">return</span>;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">// now follows a binary block of x*y bytes. </span>
<a name="l00062"></a>00062 <span class="keywordtype">char</span> *block = (<span class="keywordtype">char</span>*) malloc(blocksize);
<a name="l00063"></a>00063 <span class="keywordflow">if</span>(!block)
<a name="l00064"></a>00064 <span class="keywordflow">return</span>;
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (iodev-><a class="codeRef" href="qiodevice.html#readBlock">readBlock</a>(block, blocksize) != blocksize )
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="keywordflow">return</span>;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">// Create the image</span>
<a name="l00072"></a>00072 <a class="codeRef" href="qimage.html">QImage</a> image( x, y, 8, maxval + 1, QImage::BigEndian );
<a name="l00073"></a>00073 <span class="keywordflow">if</span>( image.isNull()) {
<a name="l00074"></a>00074 free(block);
<a name="l00075"></a>00075 <span class="keywordflow">return</span>;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="comment">// how do the color handling? they are absolute 24bpp</span>
<a name="l00079"></a>00079 <span class="comment">// or at least can be calculated as such.</span>
<a name="l00080"></a>00080 <span class="keywordtype">int</span> r,g,b;
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> j = 0; j < 256; j++ )
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 r = rg_255_7[((j >> 5) & 0x07)];
<a name="l00085"></a>00085 g = rg_255_7[((j >> 2) & 0x07)];
<a name="l00086"></a>00086 b = b_255_3[((j >> 0) & 0x03)];
<a name="l00087"></a>00087 image.setColor( j, qRgb( r, g, b ) );
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> py = 0; py < y; py++ )
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092 uchar *data = image.scanLine( py );
<a name="l00093"></a>00093 memcpy( data, block + py * x, x );
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096 _imageio-><a class="codeRef" href="qimageio.html#setImage">setImage</a>( image );
<a name="l00097"></a>00097 _imageio-><a class="codeRef" href="qimageio.html#setStatus">setStatus</a>( 0 );
<a name="l00098"></a>00098
<a name="l00099"></a>00099 free(block);
<a name="l00100"></a>00100 <span class="keywordflow">return</span>;
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103 KDE_EXPORT <span class="keywordtype">void</span> kimgio_xv_write( <a class="codeRef" href="qimageio.html">QImageIO</a> *imageio )
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 <a class="codeRef" href="qiodevice.html">QIODevice</a>& f = *( imageio-><a class="codeRef" href="qimageio.html#ioDevice">ioDevice</a>() );
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// Removed "f.open(...)" and "f.close()" (tanghus)</span>
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keyword">const</span> <a class="codeRef" href="qimage.html">QImage</a>& image = imageio-><a class="codeRef" href="qimageio.html#image">image</a>();
<a name="l00110"></a>00110 <span class="keywordtype">int</span> w = image.<a class="codeRef" href="qimage.html#width">width</a>(), h = image.<a class="codeRef" href="qimage.html#height">height</a>();
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordtype">char</span> str[ 1024 ];
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">// magic number must be "P7 332"</span>
<a name="l00115"></a>00115 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( <span class="stringliteral">"P7 332\n"</span>, 7 );
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// next line #XVVERSION</span>
<a name="l00118"></a>00118 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( <span class="stringliteral">"#XVVERSION:\n"</span>, 12 );
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// now it gets interesting, #BUILTIN means we are out.</span>
<a name="l00121"></a>00121 <span class="comment">// if IMGINFO comes, we are happy!</span>
<a name="l00122"></a>00122 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( <span class="stringliteral">"#IMGINFO:\n"</span>, 10 );
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// after this an #END_OF_COMMENTS signals everything to be ok!</span>
<a name="l00125"></a>00125 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( <span class="stringliteral">"#END_OF_COMMENTS:\n"</span>, 18 );
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">// now a last line with width, height, maxval which is supposed to be 255</span>
<a name="l00128"></a>00128 sprintf( str, <span class="stringliteral">"%i %i 255\n"</span>, w, h );
<a name="l00129"></a>00129 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( str, strlen( str ) );
<a name="l00130"></a>00130
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keywordflow">if</span> ( image.<a class="codeRef" href="qimage.html#depth">depth</a>() == 1 )
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134 image.<a class="codeRef" href="qimage.html#convertDepth">convertDepth</a>( 8 );
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137 uchar* buffer = <span class="keyword">new</span> uchar[ w ];
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> py = 0; py < h; py++ )
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 uchar *data = image.<a class="codeRef" href="qimage.html#scanLine">scanLine</a>( py );
<a name="l00142"></a>00142 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> px = 0; px < w; px++ )
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 <span class="keywordtype">int</span> r, g, b;
<a name="l00145"></a>00145 <span class="keywordflow">if</span> ( image.<a class="codeRef" href="qimage.html#depth">depth</a>() == 32 )
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147 QRgb *data32 = (QRgb*) data;
<a name="l00148"></a>00148 r = qRed( *data32 ) >> 5;
<a name="l00149"></a>00149 g = qGreen( *data32 ) >> 5;
<a name="l00150"></a>00150 b = qBlue( *data32 ) >> 6;
<a name="l00151"></a>00151 data += <span class="keyword">sizeof</span>( QRgb );
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 <span class="keywordflow">else</span>
<a name="l00154"></a>00154 {
<a name="l00155"></a>00155 QRgb color = image.<a class="codeRef" href="qimage.html#color">color</a>( *data );
<a name="l00156"></a>00156 r = qRed( color ) >> 5;
<a name="l00157"></a>00157 g = qGreen( color ) >> 5;
<a name="l00158"></a>00158 b = qBlue( color ) >> 6;
<a name="l00159"></a>00159 data++;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 buffer[ px ] = ( r << 5 ) | ( g << 2 ) | b;
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163 f.<a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( (<span class="keyword">const</span> <span class="keywordtype">char</span>*)buffer, w );
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 <span class="keyword">delete</span>[] buffer;
<a name="l00166"></a>00166
<a name="l00167"></a>00167 imageio-><a class="codeRef" href="qimageio.html#setStatus">setStatus</a>( 0 );
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169
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