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<h1>/home/dwoods/DevIL/src-IL/include/il_bmp.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//-----------------------------------------------------------------------------</span>
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// ImageLib Sources</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2000-2002 by Denton Woods</span>
<a name="l00005"></a>00005 <span class="comment">// Last modified: 09/01/2003 <--Y2K Compliant! =]</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// Filename: src-IL/include/il_bmp.h</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// Description: Reads and writes to a bitmap (.bmp) file.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">//-----------------------------------------------------------------------------</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013
<a name="l00014"></a>00014 <span class="preprocessor">#ifndef BMP_H</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#define BMP_H</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include "il_internal.h"</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#ifdef _WIN32</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor"> #pragma pack(push, bmp_struct, 1)</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keyword">struct </span>BMPHEAD {
<a name="l00023"></a>00023 ILushort bfType;
<a name="l00024"></a>00024 ILint bfSize;
<a name="l00025"></a>00025 ILuint bfReserved;
<a name="l00026"></a>00026 ILint bfDataOff;
<a name="l00027"></a>00027 ILint biSize;
<a name="l00028"></a>00028 ILint biWidth;
<a name="l00029"></a>00029 ILint biHeight;
<a name="l00030"></a>00030 ILshort biPlanes;
<a name="l00031"></a>00031 ILshort biBitCount;
<a name="l00032"></a>00032 ILint biCompression;
<a name="l00033"></a>00033 ILint biSizeImage;
<a name="l00034"></a>00034 ILint biXPelsPerMeter;
<a name="l00035"></a>00035 ILint biYPelsPerMeter;
<a name="l00036"></a>00036 ILint biClrUsed;
<a name="l00037"></a>00037 ILint biClrImportant;
<a name="l00038"></a>00038 } IL_PACKSTRUCT BMPHEAD;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">typedef</span> <span class="keyword">struct </span>OS2_HEAD
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="comment">// Bitmap file header.</span>
<a name="l00043"></a>00043 ILushort bfType;
<a name="l00044"></a>00044 ILuint biSize;
<a name="l00045"></a>00045 ILshort xHotspot;
<a name="l00046"></a>00046 ILshort yHotspot;
<a name="l00047"></a>00047 ILuint DataOff;
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">// Bitmap core header.</span>
<a name="l00050"></a>00050 ILuint cbFix;
<a name="l00051"></a>00051 <span class="comment">//2003-09-01: changed cx, cy to ushort according to MSDN</span>
<a name="l00052"></a>00052 ILushort cx;
<a name="l00053"></a>00053 ILushort cy;
<a name="l00054"></a>00054 ILushort cPlanes;
<a name="l00055"></a>00055 ILushort cBitCount;
<a name="l00056"></a>00056 } IL_PACKSTRUCT OS2_HEAD;
<a name="l00057"></a>00057 <span class="preprocessor">#ifdef _WIN32</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor"> #pragma pack(pop, bmp_struct)</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span>
<a name="l00061"></a>00061 <span class="comment">// Internal functions</span>
<a name="l00062"></a>00062 ILboolean iGetBmpHead(BMPHEAD * <span class="keyword">const</span> Header);
<a name="l00063"></a>00063 ILboolean iGetOS2Head(OS2_HEAD * <span class="keyword">const</span> Header);
<a name="l00064"></a>00064 ILboolean iIsValidBmp();
<a name="l00065"></a>00065 ILboolean iCheckBmp(<span class="keyword">const</span> BMPHEAD *CONST_RESTRICT Header);
<a name="l00066"></a>00066 ILboolean iCheckOS2(<span class="keyword">const</span> OS2_HEAD *CONST_RESTRICT Header);
<a name="l00067"></a>00067 ILboolean iLoadBitmapInternal();
<a name="l00068"></a>00068 ILboolean iSaveBitmapInternal();
<a name="l00069"></a>00069 ILboolean ilReadUncompBmp(BMPHEAD *Info);
<a name="l00070"></a>00070 ILboolean ilReadRLE8Bmp(BMPHEAD *Info);
<a name="l00071"></a>00071 ILboolean ilReadRLE4Bmp(BMPHEAD *Info);
<a name="l00072"></a>00072 ILboolean iGetOS2Bmp(OS2_HEAD *Header);
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="preprocessor">#ifdef IL_BMP_C</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span><span class="preprocessor">#undef NOINLINE</span>
<a name="l00076"></a>00076 <span class="preprocessor"></span><span class="preprocessor">#undef INLINE</span>
<a name="l00077"></a>00077 <span class="preprocessor"></span><span class="preprocessor">#define INLINE</span>
<a name="l00078"></a>00078 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span>
<a name="l00080"></a>00080 <span class="preprocessor">#ifndef NOINLINE</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span>INLINE <span class="keywordtype">void</span> GetShiftFromMask(<span class="keyword">const</span> ILuint Mask, ILuint * CONST_RESTRICT ShiftLeft, ILuint * CONST_RESTRICT ShiftRight) {
<a name="l00082"></a>00082 ILuint Temp, i;
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keywordflow">if</span>( Mask == 0 ) {
<a name="l00085"></a>00085 *ShiftLeft = *ShiftRight = 0;
<a name="l00086"></a>00086 <span class="keywordflow">return</span>;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 Temp = Mask;
<a name="l00090"></a>00090 <span class="keywordflow">for</span>( i = 0; i < 32; i++, Temp >>= 1 ) {
<a name="l00091"></a>00091 <span class="keywordflow">if</span>( Temp & 1 )
<a name="l00092"></a>00092 <span class="keywordflow">break</span>;
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 *ShiftRight = i;
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// Temp is preserved, so use it again:</span>
<a name="l00097"></a>00097 <span class="keywordflow">for</span>( i = 0; i < 8; i++, Temp >>= 1 ) {
<a name="l00098"></a>00098 <span class="keywordflow">if</span>( !(Temp & 1) )
<a name="l00099"></a>00099 <span class="keywordflow">break</span>;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 *ShiftLeft = 8 - i;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">return</span>;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105 <span class="preprocessor">#endif</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span>
<a name="l00107"></a>00107 <span class="preprocessor">#endif//BMP_H</span>
</pre></div></div>
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