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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_png_scanline_decoder_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Multimedia/ICL/ICLCodec/PngScanlineDecoder.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Multimedia/ICL/ICLCodec/PngScanlineDecoder.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// PNGSCANLINEDECODER.CPP</span>
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<a name="l00002"></a>00002 <span class="comment">//</span>
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<a name="l00003"></a>00003 <span class="comment">// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00004"></a>00004 <span class="comment">// All rights reserved.</span>
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<a name="l00005"></a>00005 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00006"></a>00006 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00007"></a>00007 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00008"></a>00008 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00009"></a>00009 <span class="comment">//</span>
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<a name="l00010"></a>00010 <span class="comment">// Initial Contributors:</span>
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<a name="l00011"></a>00011 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Contributors:</span>
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<a name="l00014"></a>00014 <span class="comment">//</span>
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<a name="l00015"></a>00015 <span class="comment">// Description:</span>
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<a name="l00016"></a>00016 <span class="comment">//</span>
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<a name="l00017"></a>00017 <span class="comment">//</span>
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<a name="l00018"></a>00018
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<a name="l00019"></a>00019 <span class="preprocessor">#include &quot;PNGCodec.h&quot;</span>
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<a name="l00020"></a>00020
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<a name="l00021"></a>00021 <span class="keyword">const</span> TInt KPngScanlineFilterTypeLength = 1;
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023 <span class="keyword">const</span> TInt KColStart[KPngNumInterlacedPasses] = { 0, 4, 0, 2, 0, 1, 0, 0 };
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<a name="l00024"></a>00024 <span class="keyword">const</span> TInt KRowStart[KPngNumInterlacedPasses] = { 0, 0, 4, 0, 2, 0, 1, 0 };
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<a name="l00025"></a>00025 <span class="keyword">const</span> TInt KColIncrement[KPngNumInterlacedPasses] = { 8, 8, 4, 4, 2, 2, 1, 0 };
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<a name="l00026"></a>00026 <span class="keyword">const</span> TInt KRowIncrement[KPngNumInterlacedPasses] = { 8, 8, 8, 4, 4, 2, 2, 0 };
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<a name="l00027"></a>00027 <span class="keyword">const</span> TInt KBlockWidth[KPngNumInterlacedPasses] = { 8, 4, 4, 2, 2, 1, 1, 0 };
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<a name="l00028"></a>00028 <span class="keyword">const</span> TInt KBlockHeight[KPngNumInterlacedPasses] = { 8, 8, 4, 4, 2, 2, 1, 0 };
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<a name="l00029"></a>00029
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<a name="l00030"></a>00030 <span class="comment">//</span>
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<a name="l00031"></a>00031 <span class="comment">// These classes specialise the PNG reader to read</span>
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<a name="l00032"></a>00032 <span class="comment">// scanlines with different bitmap depths/colour types</span>
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<a name="l00033"></a>00033 <span class="comment">//</span>
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035 <span class="keyword">class </span>CBitDepth1Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00036"></a>00036         {
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<a name="l00037"></a>00037 <span class="keyword">private</span>:
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<a name="l00038"></a>00038         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00039"></a>00039         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00040"></a>00040         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00041"></a>00041         };
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<a name="l00042"></a>00042
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<a name="l00043"></a>00043 <span class="keyword">class </span>CBitDepth2Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00044"></a>00044         {
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<a name="l00045"></a>00045 <span class="keyword">private</span>:
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<a name="l00046"></a>00046         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00047"></a>00047         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00048"></a>00048         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00049"></a>00049         };
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<a name="l00050"></a>00050
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<a name="l00051"></a>00051 <span class="keyword">class </span>CBitDepth4Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00052"></a>00052         {
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<a name="l00053"></a>00053 <span class="keyword">private</span>:
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<a name="l00054"></a>00054         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00055"></a>00055         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00056"></a>00056         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00057"></a>00057         };
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<a name="l00058"></a>00058
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<a name="l00059"></a>00059 <span class="keyword">class </span>CBitDepth8Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00060"></a>00060         {
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<a name="l00061"></a>00061 <span class="keyword">private</span>:
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<a name="l00062"></a>00062         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00063"></a>00063         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00064"></a>00064         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00065"></a>00065         };
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<a name="l00066"></a>00066
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<a name="l00067"></a>00067 <span class="keyword">class </span>CBitDepth8ColorType2Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00068"></a>00068         {
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<a name="l00069"></a>00069 <span class="keyword">private</span>:
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<a name="l00070"></a>00070         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00071"></a>00071         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00072"></a>00072         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00073"></a>00073         };
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<a name="l00074"></a>00074
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<a name="l00075"></a>00075 <span class="keyword">class </span>CBitDepth8ColorType4Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00076"></a>00076         {
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<a name="l00077"></a>00077 <span class="keyword">private</span>:
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<a name="l00078"></a>00078         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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<a name="l00079"></a>00079         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00080"></a>00080         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00081"></a>00081         };
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083 <span class="keyword">class </span>CBitDepth8ColorType6Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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<a name="l00084"></a>00084         {
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<a name="l00085"></a>00085 <span class="keyword">private</span>:
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<a name="l00086"></a>00086         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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    97
 
<a name="l00087"></a>00087         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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diff changeset 
    98
 
<a name="l00088"></a>00088         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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    99
 
<a name="l00089"></a>00089         };
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diff changeset 
   100
 
<a name="l00090"></a>00090
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   101
 
<a name="l00091"></a>00091 <span class="keyword">class </span>CBitDepth16ColorType0Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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   102
 
<a name="l00092"></a>00092         {
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diff changeset 
   103
 
<a name="l00093"></a>00093 <span class="keyword">private</span>:
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diff changeset 
   104
 
<a name="l00094"></a>00094         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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diff changeset 
   105
 
<a name="l00095"></a>00095         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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diff changeset 
   106
 
<a name="l00096"></a>00096         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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   107
 
<a name="l00097"></a>00097         };
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diff changeset 
   108
 
<a name="l00098"></a>00098
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   109
 
<a name="l00099"></a>00099 <span class="keyword">class </span>CBitDepth16ColorType2Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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   110
 
<a name="l00100"></a>00100         {
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   111
 
<a name="l00101"></a>00101 <span class="keyword">private</span>:
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   112
 
<a name="l00102"></a>00102         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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   113
 
<a name="l00103"></a>00103         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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   114
 
<a name="l00104"></a>00104         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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   115
 
<a name="l00105"></a>00105         };
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   116
 
<a name="l00106"></a>00106
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<a name="l00107"></a>00107 <span class="keyword">class </span>CBitDepth16ColorType4Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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   118
 
<a name="l00108"></a>00108         {
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   119
 
<a name="l00109"></a>00109 <span class="keyword">private</span>:
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   120
 
<a name="l00110"></a>00110         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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   121
 
<a name="l00111"></a>00111         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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   122
 
<a name="l00112"></a>00112         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00113"></a>00113         };
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   124
 
<a name="l00114"></a>00114
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<a name="l00115"></a>00115 <span class="keyword">class </span>CBitDepth16ColorType6Decoder : <span class="keyword">public</span> <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>
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   126
 
<a name="l00116"></a>00116         {
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   127
 
<a name="l00117"></a>00117 <span class="keyword">private</span>:
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   128
 
<a name="l00118"></a>00118         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoConstructL();
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   129
 
<a name="l00119"></a>00119         <span class="keyword">virtual</span> TInt ScanlineBufferSize(TInt aPixelLength);
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<a name="l00120"></a>00120         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit);
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<a name="l00121"></a>00121         };
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   132
 
<a name="l00122"></a>00122
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   133
 
<a name="l00123"></a>00123 <span class="comment">//</span>
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<a name="l00124"></a>00124 <span class="comment">// CPngReadSubCodec: base class for classes that read scanlines</span>
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   135
 
<a name="l00125"></a>00125 <span class="comment">//</span>
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diff changeset 
   136
 
<a name="l00126"></a>00126
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   137
 
<a name="l00127"></a>00127 <span class="comment">// Factory function</span>
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   138
 
<a name="l00128"></a>00128 <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>* CPngReadSubCodec::NewL(CImageProcessor* aImageProc,CImageProcessor* aMaskProc,<span class="keyword">const</span> <a class="code" href="class_t_png_image_information.html">TPngImageInformation</a>&amp; aInfo)
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   139
 
<a name="l00129"></a>00129         {
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   140
 
<a name="l00130"></a>00130         <a class="code" href="class_c_png_read_sub_codec.html">CPngReadSubCodec</a>* <span class="keyword">self</span> = NULL;
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   141
 
<a name="l00131"></a>00131
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   142
 
<a name="l00132"></a>00132         <span class="keywordflow">switch</span> (aInfo.iBitDepth)
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diff changeset 
   143
 
<a name="l00133"></a>00133                 {
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   144
 
<a name="l00134"></a>00134         <span class="keywordflow">case</span> 1:
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<a name="l00135"></a>00135                 <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth1Decoder;
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<a name="l00136"></a>00136                 <span class="keywordflow">break</span>;
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   147
 
<a name="l00137"></a>00137         <span class="keywordflow">case</span> 2:
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<a name="l00138"></a>00138                 <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth2Decoder;
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<a name="l00139"></a>00139                 <span class="keywordflow">break</span>;
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   150
 
<a name="l00140"></a>00140         <span class="keywordflow">case</span> 4:
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   151
 
<a name="l00141"></a>00141                 <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth4Decoder;
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<a name="l00142"></a>00142                 <span class="keywordflow">break</span>;
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   153
 
<a name="l00143"></a>00143         <span class="keywordflow">case</span> 8:
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   154
 
<a name="l00144"></a>00144                 <span class="keywordflow">switch</span> (aInfo.iColorType)
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   155
 
<a name="l00145"></a>00145                         {
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   156
 
<a name="l00146"></a>00146                 <span class="keywordflow">case</span> TPngImageInformation::EGrayscale:
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   157
 
<a name="l00147"></a>00147                 <span class="keywordflow">case</span> TPngImageInformation::EIndexedColor:
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<a name="l00148"></a>00148                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth8Decoder;
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   159
 
<a name="l00149"></a>00149                         <span class="keywordflow">break</span>;
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   160
 
<a name="l00150"></a>00150                 <span class="keywordflow">case</span> TPngImageInformation::EDirectColor:
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   161
 
<a name="l00151"></a>00151                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth8ColorType2Decoder;
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   162
 
<a name="l00152"></a>00152                         <span class="keywordflow">break</span>;
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   163
 
<a name="l00153"></a>00153                 <span class="keywordflow">case</span> TPngImageInformation::EAlphaGrayscale:
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   164
 
<a name="l00154"></a>00154                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth8ColorType4Decoder;
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   165
 
<a name="l00155"></a>00155                         <span class="keywordflow">break</span>;
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   166
 
<a name="l00156"></a>00156                 <span class="keywordflow">case</span> TPngImageInformation::EAlphaDirectColor:
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   167
 
<a name="l00157"></a>00157                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth8ColorType6Decoder;
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   168
 
<a name="l00158"></a>00158                         <span class="keywordflow">break</span>;
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   169
 
<a name="l00159"></a>00159                 <span class="keywordflow">default</span>:
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<a name="l00160"></a>00160                         User::Leave(KErrNotSupported);
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   171
 
<a name="l00161"></a>00161                         <span class="keywordflow">break</span>;
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   172
 
<a name="l00162"></a>00162                         }
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   173
 
<a name="l00163"></a>00163                 <span class="keywordflow">break</span>;
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   174
 
<a name="l00164"></a>00164         <span class="keywordflow">case</span> 16:
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   175
 
<a name="l00165"></a>00165                 <span class="keywordflow">switch</span> (aInfo.iColorType)
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   176
 
<a name="l00166"></a>00166                         {
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   177
 
<a name="l00167"></a>00167                 <span class="keywordflow">case</span> TPngImageInformation::EGrayscale:
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<a name="l00168"></a>00168                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth16ColorType0Decoder;
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   179
 
<a name="l00169"></a>00169                         <span class="keywordflow">break</span>;
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   180
 
<a name="l00170"></a>00170                 <span class="keywordflow">case</span> TPngImageInformation::EDirectColor:
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<a name="l00171"></a>00171                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth16ColorType2Decoder;
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   182
 
<a name="l00172"></a>00172                         <span class="keywordflow">break</span>;
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   183
 
<a name="l00173"></a>00173                 <span class="keywordflow">case</span> TPngImageInformation::EAlphaGrayscale:
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   184
 
<a name="l00174"></a>00174                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth16ColorType4Decoder;
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   185
 
<a name="l00175"></a>00175                         <span class="keywordflow">break</span>;
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   186
 
<a name="l00176"></a>00176                 <span class="keywordflow">case</span> TPngImageInformation::EAlphaDirectColor:
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<a name="l00177"></a>00177                         <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave) CBitDepth16ColorType6Decoder;
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   188
 
<a name="l00178"></a>00178                         <span class="keywordflow">break</span>;
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   189
 
<a name="l00179"></a>00179                 <span class="keywordflow">case</span> TPngImageInformation::EIndexedColor:
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   190
 
<a name="l00180"></a>00180                 <span class="keywordflow">default</span>:
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   191
 
<a name="l00181"></a>00181                         User::Leave(KErrNotSupported);
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   192
 
<a name="l00182"></a>00182                         <span class="keywordflow">break</span>;
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   193
 
<a name="l00183"></a>00183                         }
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   194
 
<a name="l00184"></a>00184                 <span class="keywordflow">break</span>;
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<a name="l00185"></a>00185         <span class="keywordflow">default</span>:
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<a name="l00186"></a>00186                 User::Leave(KErrNotSupported);
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<a name="l00187"></a>00187                 <span class="keywordflow">break</span>;
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<a name="l00188"></a>00188                 }
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   199
 
<a name="l00189"></a>00189
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<a name="l00190"></a>00190         CleanupStack::PushL(<span class="keyword">self</span>);
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<a name="l00191"></a>00191         <span class="keyword">self</span>-&gt;ConstructL(aImageProc,aMaskProc,aInfo);
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<a name="l00192"></a>00192         CleanupStack::Pop(); <span class="comment">// self</span>
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<a name="l00193"></a>00193         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00194"></a>00194         }
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<a name="l00195"></a>00195
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<a name="l00196"></a>00196 CPngReadSubCodec::CPngReadSubCodec():
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<a name="l00197"></a>00197         iScanlineDes1(NULL,0),
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<a name="l00198"></a>00198         iScanlineDes2(NULL,0)
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<a name="l00199"></a>00199         {}
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<a name="l00200"></a>00200
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<a name="l00201"></a>00201 CPngReadSubCodec::~CPngReadSubCodec()
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<a name="l00202"></a>00202         {
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<a name="l00203"></a>00203         <span class="keyword">delete</span> iScanlineBuffer1;
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<a name="l00204"></a>00204         <span class="keyword">delete</span> iScanlineBuffer2;
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<a name="l00205"></a>00205         }
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   216
 
<a name="l00206"></a>00206
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<a name="l00207"></a>00207 <span class="keywordtype">void</span> CPngReadSubCodec::ConstructL(CImageProcessor* aImageProc,CImageProcessor* aMaskProc,<span class="keyword">const</span> <a class="code" href="class_t_png_image_information.html">TPngImageInformation</a>&amp; aInfo)
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<a name="l00208"></a>00208         {
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<a name="l00209"></a>00209         iImageProc = aImageProc;
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<a name="l00210"></a>00210         iMaskProc = aMaskProc;
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<a name="l00211"></a>00211         iInfo = aInfo;
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<a name="l00212"></a>00212         iScanlineBufferSize = ScanlineBufferSize(iInfo.iSize.iWidth);
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   223
 
<a name="l00213"></a>00213
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<a name="l00214"></a>00214         DoConstructL();
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   225
 
<a name="l00215"></a>00215
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<a name="l00216"></a>00216         iScanlineBuffer1 = HBufC8::NewMaxL(iScanlineBufferSize);
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<a name="l00217"></a>00217         iScanlineBuffer2 = HBufC8::NewMaxL(iScanlineBufferSize);
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   228
 
<a name="l00218"></a>00218
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<a name="l00219"></a>00219         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::EAdam7Interlace)
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   230
 
<a name="l00220"></a>00220                 {
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   231
 
<a name="l00221"></a>00221                 iInterlacedScanlineBufferSize[0] = ScanlineBufferSize((iInfo.iSize.iWidth + 7) &gt;&gt; 3);
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<a name="l00222"></a>00222                 iInterlacedScanlineBufferSize[1] = ScanlineBufferSize((iInfo.iSize.iWidth + 3) &gt;&gt; 3);
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<a name="l00223"></a>00223                 iInterlacedScanlineBufferSize[2] = ScanlineBufferSize((iInfo.iSize.iWidth + 3) &gt;&gt; 2);
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<a name="l00224"></a>00224                 iInterlacedScanlineBufferSize[3] = ScanlineBufferSize((iInfo.iSize.iWidth + 1) &gt;&gt; 2);
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<a name="l00225"></a>00225                 iInterlacedScanlineBufferSize[4] = ScanlineBufferSize((iInfo.iSize.iWidth + 1) &gt;&gt; 1);
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<a name="l00226"></a>00226                 iInterlacedScanlineBufferSize[5] = ScanlineBufferSize(iInfo.iSize.iWidth &gt;&gt; 1);
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<a name="l00227"></a>00227                 iInterlacedScanlineBufferSize[6] = iScanlineBufferSize;
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<a name="l00228"></a>00228                 iInterlacedScanlineBufferSize[7] = 0;
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   239
 
<a name="l00229"></a>00229                 iPass = 0;
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   240
 
<a name="l00230"></a>00230
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<a name="l00231"></a>00231                 iScanlineDes1.Set(&amp;(iScanlineBuffer1-&gt;Des())[0],iInterlacedScanlineBufferSize[0],iInterlacedScanlineBufferSize[0]);
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<a name="l00232"></a>00232                 iScanlineDes2.Set(&amp;(iScanlineBuffer2-&gt;Des())[0],iInterlacedScanlineBufferSize[0],iInterlacedScanlineBufferSize[0]);
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<a name="l00233"></a>00233                 }
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<a name="l00234"></a>00234         <span class="keywordflow">else</span>
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<a name="l00235"></a>00235                 {
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<a name="l00236"></a>00236                 iScanlineDes1.Set(&amp;(iScanlineBuffer1-&gt;Des())[0],iScanlineBufferSize,iScanlineBufferSize);
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<a name="l00237"></a>00237                 iScanlineDes2.Set(&amp;(iScanlineBuffer2-&gt;Des())[0],iScanlineBufferSize,iScanlineBufferSize);
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<a name="l00238"></a>00238                 }
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<a name="l00239"></a>00239         }
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<a name="l00240"></a>00240
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   251
 
<a name="l00241"></a>00241 TDes8&amp; CPngReadSubCodec::FirstBuffer()
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   252
 
<a name="l00242"></a>00242         {
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   253
 
<a name="l00243"></a>00243         iScanlineDes1.FillZ();
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   254
 
<a name="l00244"></a>00244         iCurrentScanlineBuffer = 2;
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<a name="l00245"></a>00245         <span class="keywordflow">return</span> iScanlineDes2;
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<a name="l00246"></a>00246         }
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<a name="l00247"></a>00247
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   258
 
<a name="l00248"></a>00248 TDes8&amp; CPngReadSubCodec::DecodeL()
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<a name="l00249"></a>00249         {
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<a name="l00250"></a>00250         TUint8* dataPtr = (iCurrentScanlineBuffer == 1) ? &amp;iScanlineDes1[1] : &amp;iScanlineDes2[1];
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<a name="l00251"></a>00251         <span class="keyword">const</span> TUint8* dataPtrLimit = dataPtr + iScanlineDes1.Length() - 1;
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<a name="l00252"></a>00252
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   263
 
<a name="l00253"></a>00253         FilterScanlineDataL(dataPtr,dataPtrLimit);
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<a name="l00254"></a>00254         DoDecode(dataPtr,dataPtrLimit);
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<a name="l00255"></a>00255         UpdatePos();
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<a name="l00256"></a>00256
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<a name="l00257"></a>00257         <span class="keywordflow">if</span> (iCurrentScanlineBuffer == 1)
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diff changeset 
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<a name="l00258"></a>00258                 {
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<a name="l00259"></a>00259                 iCurrentScanlineBuffer = 2;
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<a name="l00260"></a>00260                 <span class="keywordflow">return</span> iScanlineDes2;
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<a name="l00261"></a>00261                 }
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<a name="l00262"></a>00262         <span class="keywordflow">else</span>
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   273
 
<a name="l00263"></a>00263                 {
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   274
 
<a name="l00264"></a>00264                 iCurrentScanlineBuffer = 1;
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<a name="l00265"></a>00265                 <span class="keywordflow">return</span> iScanlineDes1;
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<a name="l00266"></a>00266                 }
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<a name="l00267"></a>00267         }
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<a name="l00268"></a>00268
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<a name="l00269"></a>00269 <span class="keywordtype">void</span> CPngReadSubCodec::FilterScanlineDataL(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
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<a name="l00270"></a>00270         {
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<a name="l00271"></a>00271         TInt filterType = (iCurrentScanlineBuffer == 1) ? iScanlineDes1[0] : iScanlineDes2[0];
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<a name="l00272"></a>00272
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<a name="l00273"></a>00273         <span class="keywordflow">switch</span> (filterType)
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<a name="l00274"></a>00274                 {
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<a name="l00275"></a>00275         <span class="keywordflow">case</span> 0: <span class="comment">// None</span>
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<a name="l00276"></a>00276                 <span class="keywordflow">break</span>;
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<a name="l00277"></a>00277         <span class="keywordflow">case</span> 1: <span class="comment">// Sub</span>
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<a name="l00278"></a>00278                 {
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<a name="l00279"></a>00279                 aDataPtr += iBytesPerPixel;
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<a name="l00280"></a>00280
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<a name="l00281"></a>00281                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
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<a name="l00282"></a>00282                         {
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<a name="l00283"></a>00283                         aDataPtr[0] = TUint8(aDataPtr[0] + aDataPtr[-iBytesPerPixel]);
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<a name="l00284"></a>00284                         aDataPtr++;
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<a name="l00285"></a>00285                         }
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<a name="l00286"></a>00286                 }
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<a name="l00287"></a>00287                 <span class="keywordflow">break</span>;
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<a name="l00288"></a>00288         <span class="keywordflow">case</span> 2: <span class="comment">// Up</span>
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<a name="l00289"></a>00289                 {
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<a name="l00290"></a>00290                 TUint8* altDataPtr = (iCurrentScanlineBuffer == 1) ? &amp;iScanlineDes2[1] : &amp;iScanlineDes1[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   301
 
<a name="l00291"></a>00291
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   302
 
<a name="l00292"></a>00292                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   303
 
<a name="l00293"></a>00293                         *aDataPtr++ = TUint8(*aDataPtr + *altDataPtr++);
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   304
 
<a name="l00294"></a>00294                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   305
 
<a name="l00295"></a>00295                 <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   306
 
<a name="l00296"></a>00296         <span class="keywordflow">case</span> 3: <span class="comment">// Average</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   307
 
<a name="l00297"></a>00297                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   308
 
<a name="l00298"></a>00298                 <span class="keyword">const</span> TUint8* tempDataPtrLimit = Min&lt;const TUint8*&gt;(aDataPtr + iBytesPerPixel,aDataPtrLimit);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   309
 
<a name="l00299"></a>00299                 TUint8* altDataPtr = (iCurrentScanlineBuffer == 1) ? &amp;iScanlineDes2[1] : &amp;iScanlineDes1[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   310
 
<a name="l00300"></a>00300
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   311
 
<a name="l00301"></a>00301                 <span class="keywordflow">while</span> (aDataPtr &lt; tempDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   312
 
<a name="l00302"></a>00302                         {
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   313
 
<a name="l00303"></a>00303                         aDataPtr[0] = TUint8(aDataPtr[0] + (altDataPtr[0] / 2));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   314
 
<a name="l00304"></a>00304                         aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   315
 
<a name="l00305"></a>00305                         altDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   316
 
<a name="l00306"></a>00306                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   317
 
<a name="l00307"></a>00307
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   318
 
<a name="l00308"></a>00308                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   319
 
<a name="l00309"></a>00309                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   320
 
<a name="l00310"></a>00310                         aDataPtr[0] = TUint8(aDataPtr[0] + ((altDataPtr[0] + aDataPtr[-iBytesPerPixel]) / 2));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   321
 
<a name="l00311"></a>00311                         aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   322
 
<a name="l00312"></a>00312                         altDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   323
 
<a name="l00313"></a>00313                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   324
 
<a name="l00314"></a>00314                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   325
 
<a name="l00315"></a>00315                 <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   326
 
<a name="l00316"></a>00316         <span class="keywordflow">case</span> 4: <span class="comment">// Paeth</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   327
 
<a name="l00317"></a>00317                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   328
 
<a name="l00318"></a>00318                 <span class="keyword">const</span> TUint8* tempDataPtrLimit = Min&lt;const TUint8*&gt;(aDataPtr + iBytesPerPixel,aDataPtrLimit);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   329
 
<a name="l00319"></a>00319                 TUint8* altDataPtr = (iCurrentScanlineBuffer == 1) ? &amp;iScanlineDes2[1] : &amp;iScanlineDes1[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   330
 
<a name="l00320"></a>00320
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   331
 
<a name="l00321"></a>00321                 <span class="keywordflow">while</span> (aDataPtr &lt; tempDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   332
 
<a name="l00322"></a>00322                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   333
 
<a name="l00323"></a>00323                         aDataPtr[0] = TUint8(aDataPtr[0] + altDataPtr[0]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   334
 
<a name="l00324"></a>00324                         aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   335
 
<a name="l00325"></a>00325                         altDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   336
 
<a name="l00326"></a>00326                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   337
 
<a name="l00327"></a>00327
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   338
 
<a name="l00328"></a>00328                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   339
 
<a name="l00329"></a>00329                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   340
 
<a name="l00330"></a>00330                         aDataPtr[0] = TUint8(aDataPtr[0] + PaethPredictor(aDataPtr[-iBytesPerPixel],altDataPtr[0],altDataPtr[-iBytesPerPixel]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   341
 
<a name="l00331"></a>00331                         aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   342
 
<a name="l00332"></a>00332                         altDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   343
 
<a name="l00333"></a>00333                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   344
 
<a name="l00334"></a>00334                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   345
 
<a name="l00335"></a>00335                 <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   346
 
<a name="l00336"></a>00336         <span class="keywordflow">default</span>: <span class="comment">// Error</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   347
 
<a name="l00337"></a>00337                 User::Leave(KErrCorrupt);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   348
 
<a name="l00338"></a>00338                 <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   349
 
<a name="l00339"></a>00339                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   350
 
<a name="l00340"></a>00340         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   351
 
<a name="l00341"></a>00341
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   352
 
<a name="l00342"></a>00342 TInt CPngReadSubCodec::PaethPredictor(TInt aLeft,TInt aAbove,TInt aAboveLeft)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   353
 
<a name="l00343"></a>00343         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   354
 
<a name="l00344"></a>00344         TInt p = aLeft + aAbove - aAboveLeft;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   355
 
<a name="l00345"></a>00345         TInt pa = Abs(p - aLeft);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   356
 
<a name="l00346"></a>00346         TInt pb = Abs(p - aAbove);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   357
 
<a name="l00347"></a>00347         TInt pc = Abs(p - aAboveLeft);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   358
 
<a name="l00348"></a>00348
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   359
 
<a name="l00349"></a>00349         <span class="keywordflow">if</span> (pa &lt;= pb &amp;&amp; pa &lt;= pc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   360
 
<a name="l00350"></a>00350                 <span class="keywordflow">return</span> aLeft;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   361
 
<a name="l00351"></a>00351         <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pb &lt;= pc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   362
 
<a name="l00352"></a>00352                 <span class="keywordflow">return</span> aAbove;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   363
 
<a name="l00353"></a>00353         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   364
 
<a name="l00354"></a>00354                 <span class="keywordflow">return</span> aAboveLeft;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   365
 
<a name="l00355"></a>00355         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   366
 
<a name="l00356"></a>00356
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   367
 
<a name="l00357"></a>00357 <span class="keywordtype">void</span> CPngReadSubCodec::WritePixel(TRgb aPixelColor)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   368
 
<a name="l00358"></a>00358         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   369
 
<a name="l00359"></a>00359         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::EAdam7Interlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   370
 
<a name="l00360"></a>00360                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   371
 
<a name="l00361"></a>00361                 <span class="keyword">const</span> TInt width = Min(KBlockWidth[iPass],iInfo.iSize.iWidth - iPos.iX);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   372
 
<a name="l00362"></a>00362                 <span class="keyword">const</span> TInt endY = Min(iPos.iY + KBlockHeight[iPass],iInfo.iSize.iHeight);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   373
 
<a name="l00363"></a>00363
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   374
 
<a name="l00364"></a>00364                 TPoint pos(iPos);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   375
 
<a name="l00365"></a>00365
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   376
 
<a name="l00366"></a>00366                 <span class="keywordflow">while</span> (pos.iY &lt; endY)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   377
 
<a name="l00367"></a>00367                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   378
 
<a name="l00368"></a>00368                         iImageProc-&gt;SetPos(pos);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   379
 
<a name="l00369"></a>00369
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   380
 
<a name="l00370"></a>00370                         <span class="keywordflow">for</span> (TInt col = 0; col &lt; width; col++)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   381
 
<a name="l00371"></a>00371                                 iImageProc-&gt;SetPixel(aPixelColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   382
 
<a name="l00372"></a>00372
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   383
 
<a name="l00373"></a>00373                         pos.iY++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   384
 
<a name="l00374"></a>00374                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   385
 
<a name="l00375"></a>00375
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   386
 
<a name="l00376"></a>00376                 iPos.iX += KColIncrement[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   387
 
<a name="l00377"></a>00377                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   388
 
<a name="l00378"></a>00378         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   389
 
<a name="l00379"></a>00379                 iImageProc-&gt;SetPixel(aPixelColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   390
 
<a name="l00380"></a>00380         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   391
 
<a name="l00381"></a>00381
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   392
 
<a name="l00382"></a>00382 <span class="keywordtype">void</span> CPngReadSubCodec::WritePixel(TRgb aPixelColor,TUint8 aAlphaValue)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   393
 
<a name="l00383"></a>00383         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   394
 
<a name="l00384"></a>00384         ASSERT(iMaskProc);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   395
 
<a name="l00385"></a>00385
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   396
 
<a name="l00386"></a>00386         TRgb maskColor(TRgb::Gray256(aAlphaValue));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   397
 
<a name="l00387"></a>00387
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   398
 
<a name="l00388"></a>00388         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::EAdam7Interlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   399
 
<a name="l00389"></a>00389                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   400
 
<a name="l00390"></a>00390                 iImageProc-&gt;SetPos(iPos);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   401
 
<a name="l00391"></a>00391                 iMaskProc-&gt;SetPos(iPos);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   402
 
<a name="l00392"></a>00392                 iImageProc-&gt;SetPixel(aPixelColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   403
 
<a name="l00393"></a>00393                 iMaskProc-&gt;SetPixel(maskColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   404
 
<a name="l00394"></a>00394
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   405
 
<a name="l00395"></a>00395                 iPos.iX += KColIncrement[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   406
 
<a name="l00396"></a>00396                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   407
 
<a name="l00397"></a>00397         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   408
 
<a name="l00398"></a>00398                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   409
 
<a name="l00399"></a>00399                 iImageProc-&gt;SetPixel(aPixelColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   410
 
<a name="l00400"></a>00400                 iMaskProc-&gt;SetPixel(maskColor);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   411
 
<a name="l00401"></a>00401                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   412
 
<a name="l00402"></a>00402         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   413
 
<a name="l00403"></a>00403
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   414
 
<a name="l00404"></a>00404 <span class="keywordtype">void</span> CPngReadSubCodec::UpdatePos()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   415
 
<a name="l00405"></a>00405         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   416
 
<a name="l00406"></a>00406         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::EAdam7Interlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   417
 
<a name="l00407"></a>00407                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   418
 
<a name="l00408"></a>00408                 ASSERT(iPass &lt;= 7);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   419
 
<a name="l00409"></a>00409
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   420
 
<a name="l00410"></a>00410                 iPos.iX = KColStart[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   421
 
<a name="l00411"></a>00411                 iPos.iY += KRowIncrement[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   422
 
<a name="l00412"></a>00412
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   423
 
<a name="l00413"></a>00413                 <span class="keywordflow">while</span> (iPos.iX &gt;= iInfo.iSize.iWidth || iPos.iY &gt;= iInfo.iSize.iHeight)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   424
 
<a name="l00414"></a>00414                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   425
 
<a name="l00415"></a>00415                         iPass++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   426
 
<a name="l00416"></a>00416                         iPos.iX = KColStart[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   427
 
<a name="l00417"></a>00417                         iPos.iY = KRowStart[iPass];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   428
 
<a name="l00418"></a>00418                         iScanlineDes1.Set(&amp;(iScanlineBuffer1-&gt;Des())[0],iInterlacedScanlineBufferSize[iPass],iInterlacedScanlineBufferSize[iPass]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   429
 
<a name="l00419"></a>00419                         iScanlineDes2.Set(&amp;(iScanlineBuffer2-&gt;Des())[0],iInterlacedScanlineBufferSize[iPass],iInterlacedScanlineBufferSize[iPass]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   430
 
<a name="l00420"></a>00420                         iScanlineDes1.FillZ();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   431
 
<a name="l00421"></a>00421                         iScanlineDes2.FillZ();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   432
 
<a name="l00422"></a>00422                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   433
 
<a name="l00423"></a>00423                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   434
 
<a name="l00424"></a>00424         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   435
 
<a name="l00425"></a>00425
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   436
 
<a name="l00426"></a>00426 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   437
 
<a name="l00427"></a>00427 <span class="comment">// CBitDepth1Decoder: specialised reader for 1bpp scanlines</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   438
 
<a name="l00428"></a>00428 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   439
 
<a name="l00429"></a>00429 <span class="keywordtype">void</span> CBitDepth1Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   440
 
<a name="l00430"></a>00430         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   441
 
<a name="l00431"></a>00431         <span class="keywordflow">if</span> (!(iInfo.iColorType &amp; TPngImageInformation::EPaletteUsed))
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   442
 
<a name="l00432"></a>00432                 { <span class="comment">// Set up palette to be grayscale values</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   443
 
<a name="l00433"></a>00433                 iInfo.iPalette[0] = KRgbBlack;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   444
 
<a name="l00434"></a>00434                 iInfo.iPalette[1] = KRgbWhite;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   445
 
<a name="l00435"></a>00435
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   446
 
<a name="l00436"></a>00436
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   447
 
<a name="l00437"></a>00437                 <span class="keywordflow">if</span> (iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   448
 
<a name="l00438"></a>00438                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   449
 
<a name="l00439"></a>00439                         <span class="keywordflow">if</span> (iInfo.iTransparentGray &lt;= 1)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   450
 
<a name="l00440"></a>00440                                 iInfo.iTransparencyValue[iInfo.iTransparentGray] = 0;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   451
 
<a name="l00441"></a>00441                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   452
 
<a name="l00442"></a>00442                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   453
 
<a name="l00443"></a>00443
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   454
 
<a name="l00444"></a>00444         <span class="comment">// Replicate values to avoid shifts when decoding</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   455
 
<a name="l00445"></a>00445         iInfo.iPalette[2] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   456
 
<a name="l00446"></a>00446         iInfo.iPalette[4] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   457
 
<a name="l00447"></a>00447         iInfo.iPalette[8] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   458
 
<a name="l00448"></a>00448         iInfo.iPalette[16] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   459
 
<a name="l00449"></a>00449         iInfo.iPalette[32] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   460
 
<a name="l00450"></a>00450         iInfo.iPalette[64] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   461
 
<a name="l00451"></a>00451         iInfo.iPalette[128] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   462
 
<a name="l00452"></a>00452
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   463
 
<a name="l00453"></a>00453         <span class="keywordflow">if</span> (iInfo.iTransparencyPresent &amp;&amp; iInfo.iTransparencyValue[1] != 255)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   464
 
<a name="l00454"></a>00454                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   465
 
<a name="l00455"></a>00455                 iInfo.iTransparencyValue[2] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   466
 
<a name="l00456"></a>00456                 iInfo.iTransparencyValue[4] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   467
 
<a name="l00457"></a>00457                 iInfo.iTransparencyValue[8] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   468
 
<a name="l00458"></a>00458                 iInfo.iTransparencyValue[16] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   469
 
<a name="l00459"></a>00459                 iInfo.iTransparencyValue[32] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   470
 
<a name="l00460"></a>00460                 iInfo.iTransparencyValue[64] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   471
 
<a name="l00461"></a>00461                 iInfo.iTransparencyValue[128] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   472
 
<a name="l00462"></a>00462                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   473
 
<a name="l00463"></a>00463
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   474
 
<a name="l00464"></a>00464         iBytesPerPixel = 1;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   475
 
<a name="l00465"></a>00465         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::ENoInterlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   476
 
<a name="l00466"></a>00466                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   477
 
<a name="l00467"></a>00467                 TInt pixelPadding = ((iInfo.iSize.iWidth + 7) &amp; ~7) - iInfo.iSize.iWidth;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   478
 
<a name="l00468"></a>00468                 iImageProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   479
 
<a name="l00469"></a>00469                 <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   480
 
<a name="l00470"></a>00470                         iMaskProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   481
 
<a name="l00471"></a>00471                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   482
 
<a name="l00472"></a>00472         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   483
 
<a name="l00473"></a>00473
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   484
 
<a name="l00474"></a>00474 TInt CBitDepth1Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   485
 
<a name="l00475"></a>00475         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   486
 
<a name="l00476"></a>00476         <span class="keywordflow">return</span> ((aPixelLength + 7) / 8) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   487
 
<a name="l00477"></a>00477         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   488
 
<a name="l00478"></a>00478
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   489
 
<a name="l00479"></a>00479 <span class="keywordtype">void</span> CBitDepth1Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   490
 
<a name="l00480"></a>00480         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   491
 
<a name="l00481"></a>00481         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   492
 
<a name="l00482"></a>00482                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   493
 
<a name="l00483"></a>00483                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   494
 
<a name="l00484"></a>00484                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   495
 
<a name="l00485"></a>00485                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   496
 
<a name="l00486"></a>00486
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   497
 
<a name="l00487"></a>00487                         <span class="keywordflow">for</span> (TUint mask=0x80; mask!=0; mask&gt;&gt;=1) <span class="comment">// iterate with 0x80, 0x40 .. 0x01</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   498
 
<a name="l00488"></a>00488                                 WritePixel(iInfo.iPalette[dataValue &amp; mask],iInfo.iTransparencyValue[dataValue &amp; mask]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   499
 
<a name="l00489"></a>00489                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   500
 
<a name="l00490"></a>00490                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   501
 
<a name="l00491"></a>00491         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   502
 
<a name="l00492"></a>00492                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   503
 
<a name="l00493"></a>00493                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   504
 
<a name="l00494"></a>00494                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   505
 
<a name="l00495"></a>00495                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   506
 
<a name="l00496"></a>00496
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   507
 
<a name="l00497"></a>00497                         <span class="keywordflow">for</span> (TUint mask=0x80; mask!=0; mask&gt;&gt;=1) <span class="comment">// iterate with 0x80, 0x40 .. 0x01</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   508
 
<a name="l00498"></a>00498                                 WritePixel(iInfo.iPalette[dataValue &amp; mask]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   509
 
<a name="l00499"></a>00499                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   510
 
<a name="l00500"></a>00500                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   511
 
<a name="l00501"></a>00501         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   512
 
<a name="l00502"></a>00502
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   513
 
<a name="l00503"></a>00503
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   514
 
<a name="l00504"></a>00504 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   515
 
<a name="l00505"></a>00505 <span class="comment">// CBitDepth2Decoder: specialised reader for 2bpp scanlines</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   516
 
<a name="l00506"></a>00506 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   517
 
<a name="l00507"></a>00507 <span class="keywordtype">void</span> CBitDepth2Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   518
 
<a name="l00508"></a>00508         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   519
 
<a name="l00509"></a>00509         <span class="keywordflow">if</span> (!(iInfo.iColorType &amp; TPngImageInformation::EPaletteUsed))
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   520
 
<a name="l00510"></a>00510                 { <span class="comment">// Set up palette to be grayscale values</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   521
 
<a name="l00511"></a>00511                 iInfo.iPalette[0] = KRgbBlack;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   522
 
<a name="l00512"></a>00512                 iInfo.iPalette[1] = KRgbDarkGray;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   523
 
<a name="l00513"></a>00513                 iInfo.iPalette[2] = KRgbGray;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   524
 
<a name="l00514"></a>00514                 iInfo.iPalette[3] = KRgbWhite;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   525
 
<a name="l00515"></a>00515
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   526
 
<a name="l00516"></a>00516                 <span class="keywordflow">if</span> (iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   527
 
<a name="l00517"></a>00517                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   528
 
<a name="l00518"></a>00518                         <span class="keywordflow">if</span> (iInfo.iTransparentGray &lt;= 3)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   529
 
<a name="l00519"></a>00519                                 iInfo.iTransparencyValue[iInfo.iTransparentGray] = 0;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   530
 
<a name="l00520"></a>00520                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   531
 
<a name="l00521"></a>00521                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   532
 
<a name="l00522"></a>00522
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   533
 
<a name="l00523"></a>00523         <span class="comment">// Replicate values to avoid shifts when decoding</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   534
 
<a name="l00524"></a>00524         iInfo.iPalette[4] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   535
 
<a name="l00525"></a>00525         iInfo.iPalette[8] = iInfo.iPalette[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   536
 
<a name="l00526"></a>00526         iInfo.iPalette[12] = iInfo.iPalette[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   537
 
<a name="l00527"></a>00527
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   538
 
<a name="l00528"></a>00528         iInfo.iPalette[16] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   539
 
<a name="l00529"></a>00529         iInfo.iPalette[32] = iInfo.iPalette[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   540
 
<a name="l00530"></a>00530         iInfo.iPalette[48] = iInfo.iPalette[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   541
 
<a name="l00531"></a>00531
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   542
 
<a name="l00532"></a>00532         iInfo.iPalette[64] = iInfo.iPalette[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   543
 
<a name="l00533"></a>00533         iInfo.iPalette[128] = iInfo.iPalette[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   544
 
<a name="l00534"></a>00534         iInfo.iPalette[192] = iInfo.iPalette[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   545
 
<a name="l00535"></a>00535
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   546
 
<a name="l00536"></a>00536         <span class="keywordflow">if</span> (iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   547
 
<a name="l00537"></a>00537                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   548
 
<a name="l00538"></a>00538                 iInfo.iTransparencyValue[4] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   549
 
<a name="l00539"></a>00539                 iInfo.iTransparencyValue[8] = iInfo.iTransparencyValue[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   550
 
<a name="l00540"></a>00540                 iInfo.iTransparencyValue[12] = iInfo.iTransparencyValue[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   551
 
<a name="l00541"></a>00541
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   552
 
<a name="l00542"></a>00542                 iInfo.iTransparencyValue[16] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   553
 
<a name="l00543"></a>00543                 iInfo.iTransparencyValue[32] = iInfo.iTransparencyValue[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   554
 
<a name="l00544"></a>00544                 iInfo.iTransparencyValue[48] = iInfo.iTransparencyValue[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   555
 
<a name="l00545"></a>00545
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   556
 
<a name="l00546"></a>00546                 iInfo.iTransparencyValue[64] = iInfo.iTransparencyValue[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   557
 
<a name="l00547"></a>00547                 iInfo.iTransparencyValue[128] = iInfo.iTransparencyValue[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   558
 
<a name="l00548"></a>00548                 iInfo.iTransparencyValue[192] = iInfo.iTransparencyValue[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   559
 
<a name="l00549"></a>00549                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   560
 
<a name="l00550"></a>00550
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   561
 
<a name="l00551"></a>00551         iBytesPerPixel = 1;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   562
 
<a name="l00552"></a>00552         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::ENoInterlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   563
 
<a name="l00553"></a>00553                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   564
 
<a name="l00554"></a>00554                 TInt pixelPadding = ((iInfo.iSize.iWidth + 3) &amp; ~3) - iInfo.iSize.iWidth;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   565
 
<a name="l00555"></a>00555                 iImageProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   566
 
<a name="l00556"></a>00556                 <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   567
 
<a name="l00557"></a>00557                         iMaskProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   568
 
<a name="l00558"></a>00558                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   569
 
<a name="l00559"></a>00559         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   570
 
<a name="l00560"></a>00560
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   571
 
<a name="l00561"></a>00561 TInt CBitDepth2Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   572
 
<a name="l00562"></a>00562         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   573
 
<a name="l00563"></a>00563         <span class="keywordflow">return</span> ((aPixelLength + 3) / 4) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   574
 
<a name="l00564"></a>00564         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   575
 
<a name="l00565"></a>00565
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   576
 
<a name="l00566"></a>00566 <span class="keywordtype">void</span> CBitDepth2Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   577
 
<a name="l00567"></a>00567         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   578
 
<a name="l00568"></a>00568         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   579
 
<a name="l00569"></a>00569                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   580
 
<a name="l00570"></a>00570                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   581
 
<a name="l00571"></a>00571                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   582
 
<a name="l00572"></a>00572                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   583
 
<a name="l00573"></a>00573
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   584
 
<a name="l00574"></a>00574                         <span class="keywordflow">for</span> (TInt mask=0xc0; mask!=0; mask&gt;&gt;=2) <span class="comment">// iterate through 0xc0, 0x30, 0x0c and 0x03</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   585
 
<a name="l00575"></a>00575                                 WritePixel(iInfo.iPalette[dataValue &amp; mask],iInfo.iTransparencyValue[dataValue &amp; mask]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   586
 
<a name="l00576"></a>00576                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   587
 
<a name="l00577"></a>00577                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   588
 
<a name="l00578"></a>00578         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   589
 
<a name="l00579"></a>00579                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   590
 
<a name="l00580"></a>00580                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   591
 
<a name="l00581"></a>00581                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   592
 
<a name="l00582"></a>00582                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   593
 
<a name="l00583"></a>00583
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   594
 
<a name="l00584"></a>00584                         <span class="keywordflow">for</span> (TInt mask=0xc0; mask!=0; mask&gt;&gt;=2) <span class="comment">// iterate through 0xc0, 0x30, 0x0c and 0x03</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   595
 
<a name="l00585"></a>00585                                 WritePixel(iInfo.iPalette[dataValue &amp; mask]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   596
 
<a name="l00586"></a>00586                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   597
 
<a name="l00587"></a>00587                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   598
 
<a name="l00588"></a>00588         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   599
 
<a name="l00589"></a>00589
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   600
 
<a name="l00590"></a>00590
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   601
 
<a name="l00591"></a>00591 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   602
 
<a name="l00592"></a>00592 <span class="comment">// CBitDepth4Decoder: specialised reader for 4bpp scanlines</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   603
 
<a name="l00593"></a>00593 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   604
 
<a name="l00594"></a>00594
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   605
 
<a name="l00595"></a>00595 <span class="keywordtype">void</span> CBitDepth4Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   606
 
<a name="l00596"></a>00596         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   607
 
<a name="l00597"></a>00597         <span class="keywordflow">if</span> (!(iInfo.iColorType &amp; TPngImageInformation::EPaletteUsed))
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   608
 
<a name="l00598"></a>00598                 { <span class="comment">// Set up palette to be grayscale values</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   609
 
<a name="l00599"></a>00599                 <span class="keywordflow">for</span> (TInt index = 0; index &lt; 16; index++)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   610
 
<a name="l00600"></a>00600                         iInfo.iPalette[index] = TRgb::Gray16(index);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   611
 
<a name="l00601"></a>00601
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   612
 
<a name="l00602"></a>00602                 <span class="keywordflow">if</span> (iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   613
 
<a name="l00603"></a>00603                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   614
 
<a name="l00604"></a>00604                         <span class="keywordflow">if</span> (iInfo.iTransparentGray &lt;= 15)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   615
 
<a name="l00605"></a>00605                                 iInfo.iTransparencyValue[iInfo.iTransparentGray] = 0;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   616
 
<a name="l00606"></a>00606                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   617
 
<a name="l00607"></a>00607                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   618
 
<a name="l00608"></a>00608
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   619
 
<a name="l00609"></a>00609         iBytesPerPixel = 1;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   620
 
<a name="l00610"></a>00610         <span class="keywordflow">if</span> (iInfo.iInterlaceMethod == TPngImageInformation::ENoInterlace)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   621
 
<a name="l00611"></a>00611                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   622
 
<a name="l00612"></a>00612                 TInt pixelPadding = ((iInfo.iSize.iWidth + 1) &amp; ~1) - iInfo.iSize.iWidth;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   623
 
<a name="l00613"></a>00613                 iImageProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   624
 
<a name="l00614"></a>00614                 <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   625
 
<a name="l00615"></a>00615                         iMaskProc-&gt;SetPixelPadding(pixelPadding);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   626
 
<a name="l00616"></a>00616                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   627
 
<a name="l00617"></a>00617         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   628
 
<a name="l00618"></a>00618
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   629
 
<a name="l00619"></a>00619 TInt CBitDepth4Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   630
 
<a name="l00620"></a>00620         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   631
 
<a name="l00621"></a>00621         <span class="keywordflow">return</span> ((aPixelLength + 1) / 2) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   632
 
<a name="l00622"></a>00622         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   633
 
<a name="l00623"></a>00623
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   634
 
<a name="l00624"></a>00624 <span class="keywordtype">void</span> CBitDepth4Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   635
 
<a name="l00625"></a>00625         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   636
 
<a name="l00626"></a>00626         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   637
 
<a name="l00627"></a>00627                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   638
 
<a name="l00628"></a>00628                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   639
 
<a name="l00629"></a>00629                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   640
 
<a name="l00630"></a>00630                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   641
 
<a name="l00631"></a>00631
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   642
 
<a name="l00632"></a>00632                         WritePixel(iInfo.iPalette[dataValue &gt;&gt; 4],iInfo.iTransparencyValue[dataValue &gt;&gt; 4]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   643
 
<a name="l00633"></a>00633                         WritePixel(iInfo.iPalette[dataValue &amp; 0x0f],iInfo.iTransparencyValue[dataValue &amp; 0x0f]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   644
 
<a name="l00634"></a>00634                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   645
 
<a name="l00635"></a>00635                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   646
 
<a name="l00636"></a>00636         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   647
 
<a name="l00637"></a>00637                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   648
 
<a name="l00638"></a>00638                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   649
 
<a name="l00639"></a>00639                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   650
 
<a name="l00640"></a>00640                         TInt dataValue = *aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   651
 
<a name="l00641"></a>00641
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   652
 
<a name="l00642"></a>00642                         WritePixel(iInfo.iPalette[dataValue &gt;&gt; 4]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   653
 
<a name="l00643"></a>00643                         WritePixel(iInfo.iPalette[dataValue &amp; 0x0f]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   654
 
<a name="l00644"></a>00644                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   655
 
<a name="l00645"></a>00645                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   656
 
<a name="l00646"></a>00646         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   657
 
<a name="l00647"></a>00647
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   658
 
<a name="l00648"></a>00648
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   659
 
<a name="l00649"></a>00649 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   660
 
<a name="l00650"></a>00650 <span class="comment">// CBitDepth8Decoder: specialised reader for 8bpp scanlines</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   661
 
<a name="l00651"></a>00651 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   662
 
<a name="l00652"></a>00652
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   663
 
<a name="l00653"></a>00653 <span class="keywordtype">void</span> CBitDepth8Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   664
 
<a name="l00654"></a>00654         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   665
 
<a name="l00655"></a>00655         <span class="keywordflow">if</span> (!(iInfo.iColorType &amp; TPngImageInformation::EPaletteUsed))
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   666
 
<a name="l00656"></a>00656                 { <span class="comment">// Set up palette to be grayscale values</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   667
 
<a name="l00657"></a>00657                 <span class="keywordflow">for</span> (TInt index = 0; index &lt; 256; index++)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   668
 
<a name="l00658"></a>00658                         iInfo.iPalette[index] = TRgb::Gray256(index);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   669
 
<a name="l00659"></a>00659
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   670
 
<a name="l00660"></a>00660                 <span class="keywordflow">if</span> (iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   671
 
<a name="l00661"></a>00661                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   672
 
<a name="l00662"></a>00662                         <span class="keywordflow">if</span> (iInfo.iTransparentGray &lt;= 255)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   673
 
<a name="l00663"></a>00663                                 iInfo.iTransparencyValue[iInfo.iTransparentGray] = 0;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   674
 
<a name="l00664"></a>00664                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   675
 
<a name="l00665"></a>00665                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   676
 
<a name="l00666"></a>00666
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   677
 
<a name="l00667"></a>00667         iBytesPerPixel = 1;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   678
 
<a name="l00668"></a>00668         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   679
 
<a name="l00669"></a>00669
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   680
 
<a name="l00670"></a>00670 TInt CBitDepth8Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   681
 
<a name="l00671"></a>00671         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   682
 
<a name="l00672"></a>00672         <span class="keywordflow">return</span> aPixelLength + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   683
 
<a name="l00673"></a>00673         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   684
 
<a name="l00674"></a>00674
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   685
 
<a name="l00675"></a>00675 <span class="keywordtype">void</span> CBitDepth8Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   686
 
<a name="l00676"></a>00676         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   687
 
<a name="l00677"></a>00677         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   688
 
<a name="l00678"></a>00678                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   689
 
<a name="l00679"></a>00679                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   690
 
<a name="l00680"></a>00680                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   691
 
<a name="l00681"></a>00681                         WritePixel(iInfo.iPalette[aDataPtr[0]],iInfo.iTransparencyValue[aDataPtr[0]]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   692
 
<a name="l00682"></a>00682                         aDataPtr++;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   693
 
<a name="l00683"></a>00683                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   694
 
<a name="l00684"></a>00684                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   695
 
<a name="l00685"></a>00685         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   696
 
<a name="l00686"></a>00686                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   697
 
<a name="l00687"></a>00687                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   698
 
<a name="l00688"></a>00688                         WritePixel(iInfo.iPalette[*aDataPtr++]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   699
 
<a name="l00689"></a>00689                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   700
 
<a name="l00690"></a>00690         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   701
 
<a name="l00691"></a>00691
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   702
 
<a name="l00692"></a>00692
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   703
 
<a name="l00693"></a>00693 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   704
 
<a name="l00694"></a>00694 <span class="comment">// CBitDepth8ColorType2Decoder: specialised reader for 8bpp scanlines, direct colour</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   705
 
<a name="l00695"></a>00695 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   706
 
<a name="l00696"></a>00696
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   707
 
<a name="l00697"></a>00697 <span class="keywordtype">void</span> CBitDepth8ColorType2Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   708
 
<a name="l00698"></a>00698         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   709
 
<a name="l00699"></a>00699         iBytesPerPixel = 3;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   710
 
<a name="l00700"></a>00700         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   711
 
<a name="l00701"></a>00701
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   712
 
<a name="l00702"></a>00702 TInt CBitDepth8ColorType2Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   713
 
<a name="l00703"></a>00703         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   714
 
<a name="l00704"></a>00704         <span class="keywordflow">return</span> (aPixelLength * 3) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   715
 
<a name="l00705"></a>00705         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   716
 
<a name="l00706"></a>00706
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   717
 
<a name="l00707"></a>00707 <span class="keywordtype">void</span> CBitDepth8ColorType2Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   718
 
<a name="l00708"></a>00708         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   719
 
<a name="l00709"></a>00709         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   720
 
<a name="l00710"></a>00710                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   721
 
<a name="l00711"></a>00711                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   722
 
<a name="l00712"></a>00712                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   723
 
<a name="l00713"></a>00713                         TInt red = aDataPtr[0];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   724
 
<a name="l00714"></a>00714                         TInt green = aDataPtr[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   725
 
<a name="l00715"></a>00715                         TInt blue = aDataPtr[2];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   726
 
<a name="l00716"></a>00716                         TRgb pixelColor(red,green,blue);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   727
 
<a name="l00717"></a>00717                         <span class="keywordflow">if</span> (red == iInfo.iTransparentRed &amp;&amp; green == iInfo.iTransparentGreen &amp;&amp; blue == iInfo.iTransparentBlue)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   728
 
<a name="l00718"></a>00718                                 WritePixel(pixelColor,0);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   729
 
<a name="l00719"></a>00719                         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   730
 
<a name="l00720"></a>00720                                 WritePixel(pixelColor,255);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   731
 
<a name="l00721"></a>00721                         aDataPtr += 3;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   732
 
<a name="l00722"></a>00722                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   733
 
<a name="l00723"></a>00723                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   734
 
<a name="l00724"></a>00724         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   735
 
<a name="l00725"></a>00725                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   736
 
<a name="l00726"></a>00726                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   737
 
<a name="l00727"></a>00727                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   738
 
<a name="l00728"></a>00728                         WritePixel(TRgb(aDataPtr[0],aDataPtr[1],aDataPtr[2]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   739
 
<a name="l00729"></a>00729                         aDataPtr += 3;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   740
 
<a name="l00730"></a>00730                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   741
 
<a name="l00731"></a>00731                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   742
 
<a name="l00732"></a>00732         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   743
 
<a name="l00733"></a>00733
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   744
 
<a name="l00734"></a>00734
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   745
 
<a name="l00735"></a>00735 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   746
 
<a name="l00736"></a>00736 <span class="comment">// CBitDepth8ColorType4Decoder: specialised reader for 8bpp scanlines, alpha greyscale</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   747
 
<a name="l00737"></a>00737 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   748
 
<a name="l00738"></a>00738
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   749
 
<a name="l00739"></a>00739 <span class="keywordtype">void</span> CBitDepth8ColorType4Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   750
 
<a name="l00740"></a>00740         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   751
 
<a name="l00741"></a>00741         iBytesPerPixel = 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   752
 
<a name="l00742"></a>00742         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   753
 
<a name="l00743"></a>00743
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   754
 
<a name="l00744"></a>00744 TInt CBitDepth8ColorType4Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   755
 
<a name="l00745"></a>00745         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   756
 
<a name="l00746"></a>00746         <span class="keywordflow">return</span> (aPixelLength * 2) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   757
 
<a name="l00747"></a>00747         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   758
 
<a name="l00748"></a>00748
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   759
 
<a name="l00749"></a>00749 <span class="keywordtype">void</span> CBitDepth8ColorType4Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   760
 
<a name="l00750"></a>00750         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   761
 
<a name="l00751"></a>00751         <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   762
 
<a name="l00752"></a>00752                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   763
 
<a name="l00753"></a>00753                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   764
 
<a name="l00754"></a>00754                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   765
 
<a name="l00755"></a>00755                         WritePixel(TRgb::Gray256(aDataPtr[0]),aDataPtr[1]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   766
 
<a name="l00756"></a>00756                         aDataPtr += 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   767
 
<a name="l00757"></a>00757                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   768
 
<a name="l00758"></a>00758                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   769
 
<a name="l00759"></a>00759         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   770
 
<a name="l00760"></a>00760                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   771
 
<a name="l00761"></a>00761                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   772
 
<a name="l00762"></a>00762                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   773
 
<a name="l00763"></a>00763                         WritePixel(TRgb::Gray256(aDataPtr[0]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   774
 
<a name="l00764"></a>00764                         aDataPtr += 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   775
 
<a name="l00765"></a>00765                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   776
 
<a name="l00766"></a>00766                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   777
 
<a name="l00767"></a>00767         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   778
 
<a name="l00768"></a>00768
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   779
 
<a name="l00769"></a>00769
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   780
 
<a name="l00770"></a>00770 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   781
 
<a name="l00771"></a>00771 <span class="comment">// CBitDepth8ColorType4Decoder: specialised reader for 8bpp scanlines, alpha colour</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   782
 
<a name="l00772"></a>00772 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   783
 
<a name="l00773"></a>00773
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   784
 
<a name="l00774"></a>00774 <span class="keywordtype">void</span> CBitDepth8ColorType6Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   785
 
<a name="l00775"></a>00775         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   786
 
<a name="l00776"></a>00776         iBytesPerPixel = 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   787
 
<a name="l00777"></a>00777         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   788
 
<a name="l00778"></a>00778
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   789
 
<a name="l00779"></a>00779 TInt CBitDepth8ColorType6Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   790
 
<a name="l00780"></a>00780         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   791
 
<a name="l00781"></a>00781         <span class="keywordflow">return</span> (aPixelLength * 4) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   792
 
<a name="l00782"></a>00782         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   793
 
<a name="l00783"></a>00783
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   794
 
<a name="l00784"></a>00784 <span class="keywordtype">void</span> CBitDepth8ColorType6Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   795
 
<a name="l00785"></a>00785         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   796
 
<a name="l00786"></a>00786         <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   797
 
<a name="l00787"></a>00787                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   798
 
<a name="l00788"></a>00788                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   799
 
<a name="l00789"></a>00789                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   800
 
<a name="l00790"></a>00790                         WritePixel(TRgb(aDataPtr[0],aDataPtr[1],aDataPtr[2]),aDataPtr[3]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   801
 
<a name="l00791"></a>00791                         aDataPtr += 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   802
 
<a name="l00792"></a>00792                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   803
 
<a name="l00793"></a>00793                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   804
 
<a name="l00794"></a>00794         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   805
 
<a name="l00795"></a>00795                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   806
 
<a name="l00796"></a>00796                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   807
 
<a name="l00797"></a>00797                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   808
 
<a name="l00798"></a>00798                         WritePixel(TRgb(aDataPtr[0],aDataPtr[1],aDataPtr[2]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   809
 
<a name="l00799"></a>00799                         aDataPtr += 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   810
 
<a name="l00800"></a>00800                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   811
 
<a name="l00801"></a>00801                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   812
 
<a name="l00802"></a>00802         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   813
 
<a name="l00803"></a>00803
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   814
 
<a name="l00804"></a>00804
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   815
 
<a name="l00805"></a>00805 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   816
 
<a name="l00806"></a>00806 <span class="comment">// CBitDepth16ColorType0Decoder: specialised reader for 16bpp scanlines, greyscale</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   817
 
<a name="l00807"></a>00807 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   818
 
<a name="l00808"></a>00808
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   819
 
<a name="l00809"></a>00809 <span class="keywordtype">void</span> CBitDepth16ColorType0Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   820
 
<a name="l00810"></a>00810         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   821
 
<a name="l00811"></a>00811         iBytesPerPixel = 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   822
 
<a name="l00812"></a>00812         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   823
 
<a name="l00813"></a>00813
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   824
 
<a name="l00814"></a>00814 TInt CBitDepth16ColorType0Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   825
 
<a name="l00815"></a>00815         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   826
 
<a name="l00816"></a>00816         <span class="keywordflow">return</span> (aPixelLength * 2) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   827
 
<a name="l00817"></a>00817         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   828
 
<a name="l00818"></a>00818
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   829
 
<a name="l00819"></a>00819 <span class="keywordtype">void</span> CBitDepth16ColorType0Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   830
 
<a name="l00820"></a>00820         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   831
 
<a name="l00821"></a>00821         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   832
 
<a name="l00822"></a>00822                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   833
 
<a name="l00823"></a>00823                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   834
 
<a name="l00824"></a>00824                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   835
 
<a name="l00825"></a>00825                         TInt gray = (aDataPtr[0] &lt;&lt; 8) | aDataPtr[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   836
 
<a name="l00826"></a>00826                         TRgb pixelColor(TRgb::Gray256(aDataPtr[0]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   837
 
<a name="l00827"></a>00827                         <span class="keywordflow">if</span> (gray == iInfo.iTransparentGray)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   838
 
<a name="l00828"></a>00828                                 WritePixel(pixelColor,0);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   839
 
<a name="l00829"></a>00829                         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   840
 
<a name="l00830"></a>00830                                 WritePixel(pixelColor,255);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   841
 
<a name="l00831"></a>00831                         aDataPtr += 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   842
 
<a name="l00832"></a>00832                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   843
 
<a name="l00833"></a>00833                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   844
 
<a name="l00834"></a>00834         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   845
 
<a name="l00835"></a>00835                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   846
 
<a name="l00836"></a>00836                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   847
 
<a name="l00837"></a>00837                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   848
 
<a name="l00838"></a>00838                         WritePixel(TRgb::Gray256(aDataPtr[0]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   849
 
<a name="l00839"></a>00839                         aDataPtr += 2;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   850
 
<a name="l00840"></a>00840                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   851
 
<a name="l00841"></a>00841                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   852
 
<a name="l00842"></a>00842         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   853
 
<a name="l00843"></a>00843
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   854
 
<a name="l00844"></a>00844
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   855
 
<a name="l00845"></a>00845 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   856
 
<a name="l00846"></a>00846 <span class="comment">// CBitDepth16ColorType2Decoder: specialised reader for 16bpp scanlines, RGB colour</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   857
 
<a name="l00847"></a>00847 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   858
 
<a name="l00848"></a>00848
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   859
 
<a name="l00849"></a>00849 <span class="keywordtype">void</span> CBitDepth16ColorType2Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   860
 
<a name="l00850"></a>00850         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   861
 
<a name="l00851"></a>00851         iBytesPerPixel = 6;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   862
 
<a name="l00852"></a>00852         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   863
 
<a name="l00853"></a>00853
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   864
 
<a name="l00854"></a>00854 TInt CBitDepth16ColorType2Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   865
 
<a name="l00855"></a>00855         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   866
 
<a name="l00856"></a>00856         <span class="keywordflow">return</span> (aPixelLength * 6) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   867
 
<a name="l00857"></a>00857         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   868
 
<a name="l00858"></a>00858
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   869
 
<a name="l00859"></a>00859 <span class="keywordtype">void</span> CBitDepth16ColorType2Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   870
 
<a name="l00860"></a>00860         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   871
 
<a name="l00861"></a>00861         <span class="keywordflow">if</span> (iMaskProc &amp;&amp; iInfo.iTransparencyPresent)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   872
 
<a name="l00862"></a>00862                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   873
 
<a name="l00863"></a>00863                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   874
 
<a name="l00864"></a>00864                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   875
 
<a name="l00865"></a>00865                         TInt red = (aDataPtr[0] &lt;&lt; 8) | aDataPtr[1];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   876
 
<a name="l00866"></a>00866                         TInt green = (aDataPtr[2] &lt;&lt; 8) | aDataPtr[3];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   877
 
<a name="l00867"></a>00867                         TInt blue = (aDataPtr[4] &lt;&lt; 8) | aDataPtr[5];
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   878
 
<a name="l00868"></a>00868                         TRgb pixelColor(aDataPtr[0],aDataPtr[2],aDataPtr[4]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   879
 
<a name="l00869"></a>00869                         <span class="keywordflow">if</span> (red == iInfo.iTransparentRed &amp;&amp; green == iInfo.iTransparentGreen &amp;&amp; blue == iInfo.iTransparentBlue)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   880
 
<a name="l00870"></a>00870                                 WritePixel(pixelColor,0);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   881
 
<a name="l00871"></a>00871                         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   882
 
<a name="l00872"></a>00872                                 WritePixel(pixelColor,255);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   883
 
<a name="l00873"></a>00873                         aDataPtr += 6;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   884
 
<a name="l00874"></a>00874                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   885
 
<a name="l00875"></a>00875                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   886
 
<a name="l00876"></a>00876         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   887
 
<a name="l00877"></a>00877                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   888
 
<a name="l00878"></a>00878                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   889
 
<a name="l00879"></a>00879                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   890
 
<a name="l00880"></a>00880                         WritePixel(TRgb(aDataPtr[0],aDataPtr[2],aDataPtr[4]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   891
 
<a name="l00881"></a>00881                         aDataPtr += 6;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   892
 
<a name="l00882"></a>00882                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   893
 
<a name="l00883"></a>00883                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   894
 
<a name="l00884"></a>00884         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   895
 
<a name="l00885"></a>00885
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   896
 
<a name="l00886"></a>00886
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   897
 
<a name="l00887"></a>00887 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   898
 
<a name="l00888"></a>00888 <span class="comment">// CBitDepth16ColorType4Decoder: specialised reader for 16bpp scanlines, alpha greyscale</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   899
 
<a name="l00889"></a>00889 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   900
 
<a name="l00890"></a>00890
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   901
 
<a name="l00891"></a>00891 <span class="keywordtype">void</span> CBitDepth16ColorType4Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   902
 
<a name="l00892"></a>00892         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   903
 
<a name="l00893"></a>00893         iBytesPerPixel = 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   904
 
<a name="l00894"></a>00894         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   905
 
<a name="l00895"></a>00895
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   906
 
<a name="l00896"></a>00896 TInt CBitDepth16ColorType4Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   907
 
<a name="l00897"></a>00897         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   908
 
<a name="l00898"></a>00898         <span class="keywordflow">return</span> (aPixelLength * 4) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   909
 
<a name="l00899"></a>00899         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   910
 
<a name="l00900"></a>00900
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   911
 
<a name="l00901"></a>00901 <span class="keywordtype">void</span> CBitDepth16ColorType4Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   912
 
<a name="l00902"></a>00902         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   913
 
<a name="l00903"></a>00903         <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   914
 
<a name="l00904"></a>00904                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   915
 
<a name="l00905"></a>00905                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   916
 
<a name="l00906"></a>00906                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   917
 
<a name="l00907"></a>00907                         WritePixel(TRgb::Gray256(aDataPtr[0]),aDataPtr[2]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   918
 
<a name="l00908"></a>00908                         aDataPtr += 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   919
 
<a name="l00909"></a>00909                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   920
 
<a name="l00910"></a>00910                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   921
 
<a name="l00911"></a>00911         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   922
 
<a name="l00912"></a>00912                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   923
 
<a name="l00913"></a>00913                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   924
 
<a name="l00914"></a>00914                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   925
 
<a name="l00915"></a>00915                         WritePixel(TRgb::Gray256(aDataPtr[0]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   926
 
<a name="l00916"></a>00916                         aDataPtr += 4;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   927
 
<a name="l00917"></a>00917                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   928
 
<a name="l00918"></a>00918                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   929
 
<a name="l00919"></a>00919         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   930
 
<a name="l00920"></a>00920
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   931
 
<a name="l00921"></a>00921
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   932
 
<a name="l00922"></a>00922 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   933
 
<a name="l00923"></a>00923 <span class="comment">// CBitDepth16ColorType6Decoder: specialised reader for 16bpp scanlines, alpha colour</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   934
 
<a name="l00924"></a>00924 <span class="comment">//</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   935
 
<a name="l00925"></a>00925
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   936
 
<a name="l00926"></a>00926 <span class="keywordtype">void</span> CBitDepth16ColorType6Decoder::DoConstructL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   937
 
<a name="l00927"></a>00927         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   938
 
<a name="l00928"></a>00928         iBytesPerPixel = 8;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   939
 
<a name="l00929"></a>00929         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   940
 
<a name="l00930"></a>00930
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   941
 
<a name="l00931"></a>00931 TInt CBitDepth16ColorType6Decoder::ScanlineBufferSize(TInt aPixelLength)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   942
 
<a name="l00932"></a>00932         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   943
 
<a name="l00933"></a>00933         <span class="keywordflow">return</span> (aPixelLength * 8) + KPngScanlineFilterTypeLength;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   944
 
<a name="l00934"></a>00934         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   945
 
<a name="l00935"></a>00935
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   946
 
<a name="l00936"></a>00936 <span class="keywordtype">void</span> CBitDepth16ColorType6Decoder::DoDecode(TUint8* aDataPtr,<span class="keyword">const</span> TUint8* aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   947
 
<a name="l00937"></a>00937         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   948
 
<a name="l00938"></a>00938         <span class="keywordflow">if</span> (iMaskProc)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   949
 
<a name="l00939"></a>00939                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   950
 
<a name="l00940"></a>00940                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   951
 
<a name="l00941"></a>00941                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   952
 
<a name="l00942"></a>00942                         WritePixel(TRgb(aDataPtr[0],aDataPtr[2],aDataPtr[4]),aDataPtr[6]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   953
 
<a name="l00943"></a>00943                         aDataPtr += 8;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   954
 
<a name="l00944"></a>00944                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   955
 
<a name="l00945"></a>00945                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   956
 
<a name="l00946"></a>00946         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   957
 
<a name="l00947"></a>00947                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   958
 
<a name="l00948"></a>00948                 <span class="keywordflow">while</span> (aDataPtr &lt; aDataPtrLimit)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   959
 
<a name="l00949"></a>00949                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   960
 
<a name="l00950"></a>00950                         WritePixel(TRgb(aDataPtr[0],aDataPtr[2],aDataPtr[4]));
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   961
 
<a name="l00951"></a>00951                         aDataPtr += 8;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   962
 
<a name="l00952"></a>00952                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   963
 
<a name="l00953"></a>00953                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   964
 
<a name="l00954"></a>00954         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   965
 
<a name="l00955"></a>00955
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   966
 
</pre></div></div>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   967
 
<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   968
 
<a href="http://www.doxygen.org/index.html">
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   969
 
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   970
 
</body>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   971
 
</html>
MCL/sftools/depl/docscontent