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<h1>shadow.h</h1><div class="fragment"><pre>00001 <span class="comment">/*</span>
00002 <span class="comment">/--------------------------------------------------------------------</span>
00003 <span class="comment">|</span>
00004 <span class="comment">| $Id: shadow_8h-source.html,v 1.2 2004/09/15 15:26:32 uzadow Exp $</span>
00005 <span class="comment">| Shadow Graphic item class</span>
00006 <span class="comment">|</span>
00007 <span class="comment">| A shadowed region on a canvas. The item is basically a</span>
00008 <span class="comment">| partially transparent region. Transparency is defined by an</span>
00009 <span class="comment">| alpha DIB and a global transparency value. Most of the code</span>
00010 <span class="comment">| was just copied from CDIBGrItem & changed a bit.</span>
00011 <span class="comment">|</span>
00012 <span class="comment">| Copyright (c) 1996-2002 Ulrich von Zadow</span>
00013 <span class="comment">|</span>
00014 <span class="comment">\--------------------------------------------------------------------</span>
00015 <span class="comment">*/</span>
00016
00017 <span class="preprocessor">#ifndef INCL_SHADOW</span>
00018 <span class="preprocessor"></span><span class="preprocessor">#define INCL_SHADOW</span>
00019 <span class="preprocessor"></span>
00020 <span class="preprocessor">#include "plbitmap.h"</span>
00021 <span class="preprocessor">#include "gritem.h"</span>
00022
00023 <span class="keyword">class </span>CShadowItem : <span class="keyword">public</span> CGrItem
00024 {
00025
00026 DECLARE_DYNAMIC (CShadowItem);
00027
00028 <span class="keyword">public</span>:
00029 CShadowItem
00030 ( <span class="keywordtype">int</span> x, <span class="comment">// Position on the canvas</span>
00031 <span class="keywordtype">int</span> y,
00032 <span class="keywordtype">int</span> w, <span class="comment">// Width</span>
00033 <span class="keywordtype">int</span> h, <span class="comment">// Height</span>
00034 <span class="keywordtype">int</span> z, <span class="comment">// Position in z-Order</span>
00035 PLBYTE Opacity, <span class="comment">// Opacity of the object. 255 is completely</span>
00036 <span class="comment">// opaque, 0 is completely transparent.</span>
00037 <a class="code" href="classPLPixel32.html">PLPixel32</a> * pColor, <span class="comment">// Shadow color.</span>
00038 <a class="code" href="classPLBmp.html">PLBmp</a> * pAlphaBmp <span class="comment">// Alpha channel (must be 8 bpp). Can be NULL.</span>
00039 );
00040
00041 ~CShadowItem
00042 ();
00043
00044 <span class="keyword">virtual</span> <span class="keywordtype">void</span> Draw
00045 ( <a class="code" href="classPLBmp.html">PLBmp</a> * pCanvas,
00046 CRect * pUpdateRect
00047 );
00048 <span class="comment">// Responsible for drawing the object on the canvas.</span>
00049
00050 <span class="comment">// Member variables.</span>
00051
00052 <a class="code" href="classPLPixel32.html">PLPixel32</a> m_Color; <span class="comment">// Shadow color</span>
00053 <a class="code" href="classPLBmp.html">PLBmp</a> * m_pAlphaBmp;
00054 PLBYTE ** m_pLineArray;
00055
00056 <span class="keyword">private</span>:
00057
00058 <span class="keywordtype">void</span> drawClippedNoScale
00059 ( <a class="code" href="classPLBmp.html">PLBmp</a> * pCanvas,
00060 CRect * pRect
00061 );
00062 <span class="comment">// Draws the object. pRect must have been clipped already.</span>
00063 <span class="comment">// Assumes that no scaling is nessesary.</span>
00064
00065 <span class="keywordtype">void</span> drawAlphaLine
00066 ( PLBYTE * pDest,
00067 PLBYTE * pAlpha,
00068 CRect * pRect
00069 );
00070
00071 <span class="keywordtype">void</span> drawFadeLine
00072 ( PLBYTE * pDest,
00073 CRect * pRect
00074 );
00075 <span class="comment">// Draws one line. No scaling. Assumes alpha channel doesn't</span>
00076 <span class="comment">// exist.</span>
00077
00078 <span class="keywordtype">void</span> drawClipped
00079 ( <a class="code" href="classPLBmp.html">PLBmp</a> * pCanvas,
00080 CRect * pRect
00081 );
00082 <span class="comment">// Draws the object. pRect must have been clipped already.</span>
00083
00084 <span class="keywordtype">void</span> drawScaleLine
00085 ( PLBYTE * pDest,
00086 PLBYTE * pAlpha,
00087 CRect * pRect
00088 );
00089
00090 };
00091
00092 <span class="preprocessor">#endif</span>
00093 <span class="preprocessor"></span><span class="comment">/*</span>
00094 <span class="comment">/--------------------------------------------------------------------</span>
00095 <span class="comment">|</span>
00096 <span class="comment">| $Log: shadow_8h-source.html,v $
00096 <span class="comment">| Revision 1.2 2004/09/15 15:26:32 uzadow
00096 <span class="comment">| Linux compatibility changes, doc update.
00096 <span class="comment">|</span>
00097 <span class="comment">| Revision 1.5 2002/03/31 13:36:42 uzadow</span>
00098 <span class="comment">| Updated copyright.</span>
00099 <span class="comment">|</span>
00100 <span class="comment">| Revision 1.4 2001/09/16 19:03:23 uzadow</span>
00101 <span class="comment">| Added global name prefix PL, changed most filenames.</span>
00102 <span class="comment">|</span>
00103 <span class="comment">|</span>
00104 <span class="comment">--------------------------------------------------------------------</span>
00105 <span class="comment">*/</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Sep 13 16:16:41 2004 for paintlib by
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