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<h1>fb.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="keyword">extern</span> <span class="keywordtype">int</span> get_fbdev_addr(<span class="keywordtype">void</span>);
<a name="l00002"></a>00002 
<a name="l00003"></a>00003 <span class="preprocessor">#if defined(__linux__)</span>
<a name="l00004"></a>00004 <span class="preprocessor"></span><span class="preprocessor">#include &lt;unistd.h&gt;</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include &lt;fcntl.h&gt;</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include &lt;linux/fb.h&gt;</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include &lt;linux/fs.h&gt;</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include &lt;sys/mman.h&gt;</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;sys/ioctl.h&gt;</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00013"></a>00013 <span class="keyword">using namespace </span>std;
<a name="l00014"></a>00014 
<a name="l00015"></a>00015 <span class="preprocessor">#define DEVICE_NAME "/dev/fb0"</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#define DIV_BYTE 8</span>
<a name="l00017"></a>00017 <span class="preprocessor"></span>
<a name="l00018"></a>00018 <span class="preprocessor">#define X_PIXEL_MAX 320</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#define Y_LINE_MAX  240</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a>00021 <span class="preprocessor">#define BORDER1 80</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define BORDER2 160</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#define COLOR_RED    0xf800</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#define COLOR_GREEN  0x07e0</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span><span class="preprocessor">#define COLOR_BLUE   0x001f</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#define COLOR_WHITE  0xffff</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#define COLOR_BLACK  0x0000</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define COLOR_YELLOW 0xffe0</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="comment">/* function prototype */</span>
<a name="l00032"></a>00032 <span class="keywordtype">void</span> send_current_error_msg(<span class="keywordtype">char</span> *ptr);
<a name="l00033"></a>00033 <span class="keywordtype">void</span> send_current_information(<span class="keywordtype">char</span> *ptr);
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 <span class="keywordtype">int</span> get_fbdev_addr(<span class="keywordtype">void</span>)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037         <span class="keywordtype">int</span> fd_framebuffer ;
<a name="l00038"></a>00038         <span class="keyword">struct </span>fb_var_screeninfo vinfo;
<a name="l00039"></a>00039         <span class="keyword">struct </span>fb_fix_screeninfo finfo;
<a name="l00040"></a>00040         <span class="keywordtype">long</span> <span class="keywordtype">int</span> screensize ;
<a name="l00041"></a>00041         <span class="comment">//long int location;</span>
<a name="l00042"></a>00042         <span class="keywordtype">char</span> *fbptr ;
<a name="l00043"></a>00043         <span class="keywordtype">char</span> tmp[DIV_BYTE*10];
<a name="l00044"></a>00044 
<a name="l00045"></a>00045         <span class="comment">//int x , y ;</span>
<a name="l00046"></a>00046         <span class="keywordtype">int</span> xres,yres,vbpp,line_len;
<a name="l00047"></a>00047         <span class="comment">//unsigned short tcolor ;</span>
<a name="l00048"></a>00048 
<a name="l00049"></a>00049         <span class="comment">/* 読み書き用にファイルを開く */</span>
<a name="l00050"></a>00050         fd_framebuffer = open( DEVICE_NAME , O_RDWR);
<a name="l00051"></a>00051         <span class="keywordflow">if</span> ( !fd_framebuffer ) {
<a name="l00052"></a>00052                 send_current_error_msg(<span class="stringliteral">"Framebuffer device open error !"</span>);
<a name="l00053"></a>00053                 exit(1);
<a name="l00054"></a>00054         }
<a name="l00055"></a>00055         send_current_information(<span class="stringliteral">"The framebuffer device was opened !"</span>);
<a name="l00056"></a>00056 
<a name="l00057"></a>00057         <span class="comment">/* 固定スクリーン情報取得 */</span>
<a name="l00058"></a>00058         <span class="keywordflow">if</span> ( ioctl( fd_framebuffer , FBIOGET_FSCREENINFO , &amp;finfo ) ) {
<a name="l00059"></a>00059                 send_current_error_msg(<span class="stringliteral">"Fixed information not gotton !"</span>);
<a name="l00060"></a>00060                 exit(2);
<a name="l00061"></a>00061         }
<a name="l00062"></a>00062 
<a name="l00063"></a>00063         <span class="comment">/* 変動スクリーン情報取得 */</span>
<a name="l00064"></a>00064         <span class="keywordflow">if</span> ( ioctl( fd_framebuffer , FBIOGET_VSCREENINFO , &amp;vinfo ) ) {
<a name="l00065"></a>00065                 send_current_error_msg(<span class="stringliteral">"Variable information not gotton !"</span>);
<a name="l00066"></a>00066                 exit(3);
<a name="l00067"></a>00067         }
<a name="l00068"></a>00068         xres = vinfo.xres ;
<a name="l00069"></a>00069         yres = vinfo.yres ;
<a name="l00070"></a>00070         vbpp = vinfo.bits_per_pixel ;
<a name="l00071"></a>00071         line_len = finfo.line_length ;
<a name="l00072"></a>00072         sprintf( tmp , <span class="stringliteral">"%d(pixel)x%d(line), %dbpp(bits per pixel)"</span>,xres,yres,vbpp);
<a name="l00073"></a>00073         send_current_information( tmp );
<a name="l00074"></a>00074 
<a name="l00075"></a>00075         <span class="comment">/* バイト単位でのスクリーンのサイズを計算 */</span>
<a name="l00076"></a>00076         screensize = xres * yres * vbpp / DIV_BYTE ;
<a name="l00077"></a>00077 
<a name="l00078"></a>00078         <span class="comment">/* デバイスをメモリにマップする */</span>
<a name="l00079"></a>00079         fbptr = (<span class="keywordtype">char</span> *)mmap(0,screensize,PROT_READ | PROT_WRITE,MAP_SHARED,fd_framebuffer,0);
<a name="l00080"></a>00080         <span class="keywordflow">if</span> ( (<span class="keywordtype">int</span>)fbptr == -1 ) {
<a name="l00081"></a>00081                 send_current_error_msg(<span class="stringliteral">"Don't get framebuffer device to memory !"</span>);
<a name="l00082"></a>00082                 exit(4);
<a name="l00083"></a>00083         }
<a name="l00084"></a>00084         send_current_information(<span class="stringliteral">"The framebuffer device was mapped !"</span>);
<a name="l00085"></a>00085 
<a name="l00086"></a>00086         printf(<span class="stringliteral">"fb: 0x%x \n"</span>, (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)fbptr);
<a name="l00087"></a>00087         <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)fbptr;
<a name="l00088"></a>00088         <span class="comment">//munmap(fbptr,screensize);</span>
<a name="l00089"></a>00089         <span class="comment">//close(fd_framebuffer);</span>
<a name="l00090"></a>00090         <span class="comment">//return 0;</span>
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092 
<a name="l00093"></a>00093 <span class="keywordtype">void</span> send_current_error_msg(<span class="keywordtype">char</span> *ptr)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095         fprintf( stderr , <span class="stringliteral">"%s\n"</span> , ptr );
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 
<a name="l00098"></a>00098 <span class="keywordtype">void</span> send_current_information(<span class="keywordtype">char</span> *ptr)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100         fprintf( stdout , <span class="stringliteral">"%s\n"</span> , ptr );
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102 <span class="preprocessor">#else </span><span class="comment">/* __linux__ */</span>
<a name="l00103"></a>00103 <span class="keywordtype">int</span> get_fbdev_addr(<span class="keywordtype">void</span>) {<span class="keywordflow">return</span> 0;}
<a name="l00104"></a>00104 <span class="preprocessor">#endif </span><span class="comment">/* __linux__ */</span>
</pre></div></div>
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