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11 <h1>examples/PIPS/antiword/src/imgexam.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
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12 <a name="l00002"></a>00002 <span class="comment"> * imgexam.c</span> |
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13 <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2000-2004 A.J. van Os; Released under GNU GPL</span> |
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14 <a name="l00004"></a>00004 <span class="comment"> *</span> |
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15 <a name="l00005"></a>00005 <span class="comment"> * Description:</span> |
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16 <a name="l00006"></a>00006 <span class="comment"> * Functions to examine image headers</span> |
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17 <a name="l00007"></a>00007 <span class="comment"> *</span> |
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18 <a name="l00008"></a>00008 <span class="comment"> *================================================================</span> |
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19 <a name="l00009"></a>00009 <span class="comment"> * Part of this software is based on:</span> |
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20 <a name="l00010"></a>00010 <span class="comment"> * jpeg2ps - convert JPEG compressed images to PostScript Level 2</span> |
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21 <a name="l00011"></a>00011 <span class="comment"> * Copyright (C) 1994-99 Thomas Merz (tm@muc.de)</span> |
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22 <a name="l00012"></a>00012 <span class="comment"> *================================================================</span> |
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23 <a name="l00013"></a>00013 <span class="comment"> * The credit should go to him, but all the bugs are mine.</span> |
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24 <a name="l00014"></a>00014 <span class="comment"> */</span> |
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25 <a name="l00015"></a>00015 |
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26 <a name="l00016"></a>00016 <span class="preprocessor">#include <stdio.h></span> |
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27 <a name="l00017"></a>00017 <span class="preprocessor">#include <string.h></span> |
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28 <a name="l00018"></a>00018 <span class="preprocessor">#include <ctype.h></span> |
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29 <a name="l00019"></a>00019 <span class="preprocessor">#include "antiword.h"</span> |
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30 <a name="l00020"></a>00020 |
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31 <a name="l00021"></a>00021 <span class="comment">/* BMP compression types */</span> |
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32 <a name="l00022"></a>00022 <span class="preprocessor">#define BI_RGB 0</span> |
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33 <a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define BI_RLE8 1</span> |
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34 <a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define BI_RLE4 2</span> |
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35 <a name="l00025"></a>00025 <span class="preprocessor"></span> |
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36 <a name="l00026"></a>00026 <span class="comment">/* PNG colortype bits */</span> |
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37 <a name="l00027"></a>00027 <span class="preprocessor">#define PNG_CB_PALETTE 0x01</span> |
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38 <a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#define PNG_CB_COLOR 0x02</span> |
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39 <a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define PNG_CB_ALPHA 0x04</span> |
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40 <a name="l00030"></a>00030 <span class="preprocessor"></span> |
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41 <a name="l00031"></a>00031 <span class="comment">/* Instance signature */</span> |
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42 <a name="l00032"></a>00032 <span class="preprocessor">#define MSOBI_WMF 0x0216</span> |
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43 <a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define MSOBI_EMF 0x03d4</span> |
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44 <a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#define MSOBI_PICT 0x0542</span> |
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45 <a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#define MSOBI_PNG 0x06e0</span> |
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46 <a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#define MSOBI_JPEG 0x046a</span> |
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47 <a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define MSOBI_DIB 0x07a8</span> |
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48 <a name="l00038"></a>00038 <span class="preprocessor"></span> |
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49 <a name="l00039"></a>00039 <span class="comment">/* The following enum is stolen from the IJG JPEG library */</span> |
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50 <a name="l00040"></a>00040 <span class="keyword">typedef</span> <span class="keyword">enum</span> { <span class="comment">/* JPEG marker codes */</span> |
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51 <a name="l00041"></a>00041 M_SOF0 = 0xc0, <span class="comment">/* baseline DCT */</span> |
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52 <a name="l00042"></a>00042 M_SOF1 = 0xc1, <span class="comment">/* extended sequential DCT */</span> |
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53 <a name="l00043"></a>00043 M_SOF2 = 0xc2, <span class="comment">/* progressive DCT */</span> |
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54 <a name="l00044"></a>00044 M_SOF3 = 0xc3, <span class="comment">/* lossless (sequential) */</span> |
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55 <a name="l00045"></a>00045 |
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56 <a name="l00046"></a>00046 M_SOF5 = 0xc5, <span class="comment">/* differential sequential DCT */</span> |
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57 <a name="l00047"></a>00047 M_SOF6 = 0xc6, <span class="comment">/* differential progressive DCT */</span> |
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58 <a name="l00048"></a>00048 M_SOF7 = 0xc7, <span class="comment">/* differential lossless */</span> |
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59 <a name="l00049"></a>00049 |
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60 <a name="l00050"></a>00050 M_JPG = 0xc8, <span class="comment">/* JPEG extensions */</span> |
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61 <a name="l00051"></a>00051 M_SOF9 = 0xc9, <span class="comment">/* extended sequential DCT */</span> |
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62 <a name="l00052"></a>00052 M_SOF10 = 0xca, <span class="comment">/* progressive DCT */</span> |
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63 <a name="l00053"></a>00053 M_SOF11 = 0xcb, <span class="comment">/* lossless (sequential) */</span> |
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64 <a name="l00054"></a>00054 |
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65 <a name="l00055"></a>00055 M_SOF13 = 0xcd, <span class="comment">/* differential sequential DCT */</span> |
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66 <a name="l00056"></a>00056 M_SOF14 = 0xce, <span class="comment">/* differential progressive DCT */</span> |
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67 <a name="l00057"></a>00057 M_SOF15 = 0xcf, <span class="comment">/* differential lossless */</span> |
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68 <a name="l00058"></a>00058 |
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69 <a name="l00059"></a>00059 M_DHT = 0xc4, <span class="comment">/* define Huffman tables */</span> |
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70 <a name="l00060"></a>00060 |
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71 <a name="l00061"></a>00061 M_DAC = 0xcc, <span class="comment">/* define arithmetic conditioning table */</span> |
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72 <a name="l00062"></a>00062 |
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73 <a name="l00063"></a>00063 M_RST0 = 0xd0, <span class="comment">/* restart */</span> |
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74 <a name="l00064"></a>00064 M_RST1 = 0xd1, <span class="comment">/* restart */</span> |
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75 <a name="l00065"></a>00065 M_RST2 = 0xd2, <span class="comment">/* restart */</span> |
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76 <a name="l00066"></a>00066 M_RST3 = 0xd3, <span class="comment">/* restart */</span> |
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77 <a name="l00067"></a>00067 M_RST4 = 0xd4, <span class="comment">/* restart */</span> |
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78 <a name="l00068"></a>00068 M_RST5 = 0xd5, <span class="comment">/* restart */</span> |
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79 <a name="l00069"></a>00069 M_RST6 = 0xd6, <span class="comment">/* restart */</span> |
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80 <a name="l00070"></a>00070 M_RST7 = 0xd7, <span class="comment">/* restart */</span> |
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81 <a name="l00071"></a>00071 |
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82 <a name="l00072"></a>00072 M_SOI = 0xd8, <span class="comment">/* start of image */</span> |
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83 <a name="l00073"></a>00073 M_EOI = 0xd9, <span class="comment">/* end of image */</span> |
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84 <a name="l00074"></a>00074 M_SOS = 0xda, <span class="comment">/* start of scan */</span> |
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85 <a name="l00075"></a>00075 M_DQT = 0xdb, <span class="comment">/* define quantization tables */</span> |
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86 <a name="l00076"></a>00076 M_DNL = 0xdc, <span class="comment">/* define number of lines */</span> |
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87 <a name="l00077"></a>00077 M_DRI = 0xdd, <span class="comment">/* define restart interval */</span> |
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88 <a name="l00078"></a>00078 M_DHP = 0xde, <span class="comment">/* define hierarchical progression */</span> |
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89 <a name="l00079"></a>00079 M_EXP = 0xdf, <span class="comment">/* expand reference image(s) */</span> |
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90 <a name="l00080"></a>00080 |
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91 <a name="l00081"></a>00081 M_APP0 = 0xe0, <span class="comment">/* application marker, used for JFIF */</span> |
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92 <a name="l00082"></a>00082 M_APP1 = 0xe1, <span class="comment">/* application marker */</span> |
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93 <a name="l00083"></a>00083 M_APP2 = 0xe2, <span class="comment">/* application marker */</span> |
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94 <a name="l00084"></a>00084 M_APP3 = 0xe3, <span class="comment">/* application marker */</span> |
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95 <a name="l00085"></a>00085 M_APP4 = 0xe4, <span class="comment">/* application marker */</span> |
|
96 <a name="l00086"></a>00086 M_APP5 = 0xe5, <span class="comment">/* application marker */</span> |
|
97 <a name="l00087"></a>00087 M_APP6 = 0xe6, <span class="comment">/* application marker */</span> |
|
98 <a name="l00088"></a>00088 M_APP7 = 0xe7, <span class="comment">/* application marker */</span> |
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99 <a name="l00089"></a>00089 M_APP8 = 0xe8, <span class="comment">/* application marker */</span> |
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100 <a name="l00090"></a>00090 M_APP9 = 0xe9, <span class="comment">/* application marker */</span> |
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101 <a name="l00091"></a>00091 M_APP10 = 0xea, <span class="comment">/* application marker */</span> |
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102 <a name="l00092"></a>00092 M_APP11 = 0xeb, <span class="comment">/* application marker */</span> |
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103 <a name="l00093"></a>00093 M_APP12 = 0xec, <span class="comment">/* application marker */</span> |
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104 <a name="l00094"></a>00094 M_APP13 = 0xed, <span class="comment">/* application marker */</span> |
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105 <a name="l00095"></a>00095 M_APP14 = 0xee, <span class="comment">/* application marker, used by Adobe */</span> |
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106 <a name="l00096"></a>00096 M_APP15 = 0xef, <span class="comment">/* application marker */</span> |
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107 <a name="l00097"></a>00097 |
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108 <a name="l00098"></a>00098 M_JPG0 = 0xf0, <span class="comment">/* reserved for JPEG extensions */</span> |
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109 <a name="l00099"></a>00099 M_JPG13 = 0xfd, <span class="comment">/* reserved for JPEG extensions */</span> |
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110 <a name="l00100"></a>00100 M_COM = 0xfe, <span class="comment">/* comment */</span> |
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111 <a name="l00101"></a>00101 |
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112 <a name="l00102"></a>00102 M_TEM = 0x01 <span class="comment">/* temporary use */</span> |
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113 <a name="l00103"></a>00103 } JPEG_MARKER; |
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114 <a name="l00104"></a>00104 |
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115 <a name="l00105"></a>00105 |
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116 <a name="l00106"></a>00106 <span class="comment">/*</span> |
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117 <a name="l00107"></a>00107 <span class="comment"> * bFillPaletteDIB - fill the palette part of the imagesdata</span> |
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118 <a name="l00108"></a>00108 <span class="comment"> *</span> |
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119 <a name="l00109"></a>00109 <span class="comment"> * returns TRUE if the images must be a color image, otherwise FALSE;</span> |
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120 <a name="l00110"></a>00110 <span class="comment"> */</span> |
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121 <a name="l00111"></a>00111 <span class="keyword">static</span> BOOL |
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122 <a name="l00112"></a>00112 bFillPaletteDIB(FILE *pFile, imagedata_type *pImg, BOOL bNewFormat) |
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123 <a name="l00113"></a>00113 { |
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124 <a name="l00114"></a>00114 <span class="keywordtype">int</span> iIndex; |
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125 <a name="l00115"></a>00115 BOOL bIsColorPalette; |
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126 <a name="l00116"></a>00116 |
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127 <a name="l00117"></a>00117 fail(pFile == NULL); |
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128 <a name="l00118"></a>00118 fail(pImg == NULL); |
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129 <a name="l00119"></a>00119 |
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130 <a name="l00120"></a>00120 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent > 8) { |
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131 <a name="l00121"></a>00121 <span class="comment">/* No palette, image uses more than 256 colors */</span> |
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132 <a name="l00122"></a>00122 <span class="keywordflow">return</span> TRUE; |
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133 <a name="l00123"></a>00123 } |
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134 <a name="l00124"></a>00124 |
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135 <a name="l00125"></a>00125 <span class="keywordflow">if</span> (pImg->iColorsUsed <= 0) { |
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136 <a name="l00126"></a>00126 <span class="comment">/* Not specified, so compute the number of colors used */</span> |
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137 <a name="l00127"></a>00127 pImg->iColorsUsed = 1 << pImg->uiBitsPerComponent; |
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138 <a name="l00128"></a>00128 } |
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139 <a name="l00129"></a>00129 |
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140 <a name="l00130"></a>00130 fail(pImg->iColorsUsed > 256); |
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141 <a name="l00131"></a>00131 <span class="keywordflow">if</span> (pImg->iColorsUsed > 256) { |
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142 <a name="l00132"></a>00132 pImg->iColorsUsed = 256; |
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143 <a name="l00133"></a>00133 } |
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144 <a name="l00134"></a>00134 |
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145 <a name="l00135"></a>00135 bIsColorPalette = FALSE; |
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146 <a name="l00136"></a>00136 <span class="keywordflow">for</span> (iIndex = 0; iIndex < pImg->iColorsUsed; iIndex++) { |
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147 <a name="l00137"></a>00137 <span class="comment">/* From BGR order to RGB order */</span> |
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148 <a name="l00138"></a>00138 pImg->aucPalette[iIndex][2] = (UCHAR)iNextByte(pFile); |
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149 <a name="l00139"></a>00139 pImg->aucPalette[iIndex][1] = (UCHAR)iNextByte(pFile); |
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150 <a name="l00140"></a>00140 pImg->aucPalette[iIndex][0] = (UCHAR)iNextByte(pFile); |
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151 <a name="l00141"></a>00141 <span class="keywordflow">if</span> (bNewFormat) { |
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152 <a name="l00142"></a>00142 (void)iNextByte(pFile); |
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153 <a name="l00143"></a>00143 } |
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154 <a name="l00144"></a>00144 NO_DBG_PRINT_BLOCK(pImg->aucPalette[iIndex], 3); |
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155 <a name="l00145"></a>00145 <span class="keywordflow">if</span> (pImg->aucPalette[iIndex][0] != |
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156 <a name="l00146"></a>00146 pImg->aucPalette[iIndex][1] || |
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157 <a name="l00147"></a>00147 pImg->aucPalette[iIndex][1] != |
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158 <a name="l00148"></a>00148 pImg->aucPalette[iIndex][2]) { |
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159 <a name="l00149"></a>00149 bIsColorPalette = TRUE; |
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160 <a name="l00150"></a>00150 } |
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161 <a name="l00151"></a>00151 } |
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162 <a name="l00152"></a>00152 |
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163 <a name="l00153"></a>00153 <span class="keywordflow">return</span> bIsColorPalette; |
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164 <a name="l00154"></a>00154 } <span class="comment">/* end of bFillPaletteDIB */</span> |
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165 <a name="l00155"></a>00155 |
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166 <a name="l00156"></a>00156 <span class="comment">/*</span> |
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167 <a name="l00157"></a>00157 <span class="comment"> * bExamineDIB - Examine a DIB header</span> |
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168 <a name="l00158"></a>00158 <span class="comment"> *</span> |
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169 <a name="l00159"></a>00159 <span class="comment"> * return TRUE if successful, otherwise FALSE</span> |
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170 <a name="l00160"></a>00160 <span class="comment"> */</span> |
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171 <a name="l00161"></a>00161 <span class="keyword">static</span> BOOL |
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172 <a name="l00162"></a>00162 bExamineDIB(FILE *pFile, imagedata_type *pImg) |
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173 <a name="l00163"></a>00163 { |
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174 <a name="l00164"></a>00164 <span class="keywordtype">size_t</span> tHeaderSize; |
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175 <a name="l00165"></a>00165 <span class="keywordtype">int</span> iPlanes, iCompression; |
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176 <a name="l00166"></a>00166 |
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177 <a name="l00167"></a>00167 tHeaderSize = (size_t)ulNextLong(pFile); |
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178 <a name="l00168"></a>00168 <span class="keywordflow">switch</span> (tHeaderSize) { |
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179 <a name="l00169"></a>00169 <span class="keywordflow">case</span> 12: |
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180 <a name="l00170"></a>00170 pImg->iWidth = (int)usNextWord(pFile); |
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181 <a name="l00171"></a>00171 pImg->iHeight = (int)usNextWord(pFile); |
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182 <a name="l00172"></a>00172 iPlanes = (int)usNextWord(pFile); |
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183 <a name="l00173"></a>00173 pImg->uiBitsPerComponent = (UINT)usNextWord(pFile); |
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184 <a name="l00174"></a>00174 iCompression = BI_RGB; |
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185 <a name="l00175"></a>00175 pImg->iColorsUsed = 0; |
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186 <a name="l00176"></a>00176 <span class="keywordflow">break</span>; |
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187 <a name="l00177"></a>00177 <span class="keywordflow">case</span> 40: |
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188 <a name="l00178"></a>00178 <span class="keywordflow">case</span> 64: |
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189 <a name="l00179"></a>00179 pImg->iWidth = (int)ulNextLong(pFile); |
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190 <a name="l00180"></a>00180 pImg->iHeight = (int)ulNextLong(pFile); |
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191 <a name="l00181"></a>00181 iPlanes = (int)usNextWord(pFile); |
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192 <a name="l00182"></a>00182 pImg->uiBitsPerComponent = (UINT)usNextWord(pFile); |
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193 <a name="l00183"></a>00183 iCompression = (int)ulNextLong(pFile); |
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194 <a name="l00184"></a>00184 (void)tSkipBytes(pFile, 12); |
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195 <a name="l00185"></a>00185 pImg->iColorsUsed = (int)ulNextLong(pFile); |
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196 <a name="l00186"></a>00186 (void)tSkipBytes(pFile, tHeaderSize - 36); |
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197 <a name="l00187"></a>00187 <span class="keywordflow">break</span>; |
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198 <a name="l00188"></a>00188 <span class="keywordflow">default</span>: |
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199 <a name="l00189"></a>00189 DBG_DEC(tHeaderSize); |
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200 <a name="l00190"></a>00190 <span class="keywordflow">return</span> FALSE; |
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201 <a name="l00191"></a>00191 } |
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202 <a name="l00192"></a>00192 DBG_DEC(pImg->iWidth); |
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203 <a name="l00193"></a>00193 DBG_DEC(pImg->iHeight); |
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204 <a name="l00194"></a>00194 DBG_DEC(pImg->uiBitsPerComponent); |
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205 <a name="l00195"></a>00195 DBG_DEC(iCompression); |
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206 <a name="l00196"></a>00196 DBG_DEC(pImg->iColorsUsed); |
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207 <a name="l00197"></a>00197 |
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208 <a name="l00198"></a>00198 <span class="comment">/* Do some sanity checks with the parameters */</span> |
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209 <a name="l00199"></a>00199 <span class="keywordflow">if</span> (iPlanes != 1) { |
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210 <a name="l00200"></a>00200 DBG_DEC(iPlanes); |
|
211 <a name="l00201"></a>00201 <span class="keywordflow">return</span> FALSE; |
|
212 <a name="l00202"></a>00202 } |
|
213 <a name="l00203"></a>00203 <span class="keywordflow">if</span> (pImg->iWidth <= 0 || pImg->iHeight <= 0) { |
|
214 <a name="l00204"></a>00204 DBG_DEC(pImg->iWidth); |
|
215 <a name="l00205"></a>00205 DBG_DEC(pImg->iHeight); |
|
216 <a name="l00206"></a>00206 <span class="keywordflow">return</span> FALSE; |
|
217 <a name="l00207"></a>00207 } |
|
218 <a name="l00208"></a>00208 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent != 1 && pImg->uiBitsPerComponent != 4 && |
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219 <a name="l00209"></a>00209 pImg->uiBitsPerComponent != 8 && pImg->uiBitsPerComponent != 24) { |
|
220 <a name="l00210"></a>00210 DBG_DEC(pImg->uiBitsPerComponent); |
|
221 <a name="l00211"></a>00211 <span class="keywordflow">return</span> FALSE; |
|
222 <a name="l00212"></a>00212 } |
|
223 <a name="l00213"></a>00213 <span class="keywordflow">if</span> (iCompression != BI_RGB && |
|
224 <a name="l00214"></a>00214 (pImg->uiBitsPerComponent == 1 || pImg->uiBitsPerComponent == 24)) { |
|
225 <a name="l00215"></a>00215 <span class="keywordflow">return</span> FALSE; |
|
226 <a name="l00216"></a>00216 } |
|
227 <a name="l00217"></a>00217 <span class="keywordflow">if</span> (iCompression == BI_RLE8 && pImg->uiBitsPerComponent == 4) { |
|
228 <a name="l00218"></a>00218 <span class="keywordflow">return</span> FALSE; |
|
229 <a name="l00219"></a>00219 } |
|
230 <a name="l00220"></a>00220 <span class="keywordflow">if</span> (iCompression == BI_RLE4 && pImg->uiBitsPerComponent == 8) { |
|
231 <a name="l00221"></a>00221 <span class="keywordflow">return</span> FALSE; |
|
232 <a name="l00222"></a>00222 } |
|
233 <a name="l00223"></a>00223 |
|
234 <a name="l00224"></a>00224 <span class="keywordflow">switch</span> (iCompression) { |
|
235 <a name="l00225"></a>00225 <span class="keywordflow">case</span> BI_RGB: |
|
236 <a name="l00226"></a>00226 pImg->eCompression = compression_none; |
|
237 <a name="l00227"></a>00227 <span class="keywordflow">break</span>; |
|
238 <a name="l00228"></a>00228 <span class="keywordflow">case</span> BI_RLE4: |
|
239 <a name="l00229"></a>00229 pImg->eCompression = compression_rle4; |
|
240 <a name="l00230"></a>00230 <span class="keywordflow">break</span>; |
|
241 <a name="l00231"></a>00231 <span class="keywordflow">case</span> BI_RLE8: |
|
242 <a name="l00232"></a>00232 pImg->eCompression = compression_rle8; |
|
243 <a name="l00233"></a>00233 <span class="keywordflow">break</span>; |
|
244 <a name="l00234"></a>00234 <span class="keywordflow">default</span>: |
|
245 <a name="l00235"></a>00235 DBG_DEC(iCompression); |
|
246 <a name="l00236"></a>00236 <span class="keywordflow">return</span> FALSE; |
|
247 <a name="l00237"></a>00237 } |
|
248 <a name="l00238"></a>00238 |
|
249 <a name="l00239"></a>00239 pImg->bColorImage = bFillPaletteDIB(pFile, pImg, tHeaderSize > 12); |
|
250 <a name="l00240"></a>00240 |
|
251 <a name="l00241"></a>00241 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent <= 8) { |
|
252 <a name="l00242"></a>00242 pImg->iComponents = 1; |
|
253 <a name="l00243"></a>00243 } <span class="keywordflow">else</span> { |
|
254 <a name="l00244"></a>00244 pImg->iComponents = (int)(pImg->uiBitsPerComponent / 8); |
|
255 <a name="l00245"></a>00245 } |
|
256 <a name="l00246"></a>00246 |
|
257 <a name="l00247"></a>00247 <span class="keywordflow">return</span> TRUE; |
|
258 <a name="l00248"></a>00248 } <span class="comment">/* end of bExamineDIB */</span> |
|
259 <a name="l00249"></a>00249 |
|
260 <a name="l00250"></a>00250 <span class="comment">/*</span> |
|
261 <a name="l00251"></a>00251 <span class="comment"> * iNextMarker - read the next JPEG marker</span> |
|
262 <a name="l00252"></a>00252 <span class="comment"> */</span> |
|
263 <a name="l00253"></a>00253 <span class="keyword">static</span> <span class="keywordtype">int</span> |
|
264 <a name="l00254"></a>00254 iNextMarker(FILE *pFile) |
|
265 <a name="l00255"></a>00255 { |
|
266 <a name="l00256"></a>00256 <span class="keywordtype">int</span> iMarker; |
|
267 <a name="l00257"></a>00257 |
|
268 <a name="l00258"></a>00258 <span class="keywordflow">do</span> { |
|
269 <a name="l00259"></a>00259 <span class="keywordflow">do</span> { |
|
270 <a name="l00260"></a>00260 iMarker = iNextByte(pFile); |
|
271 <a name="l00261"></a>00261 } <span class="keywordflow">while</span> (iMarker != 0xff && iMarker != EOF); |
|
272 <a name="l00262"></a>00262 <span class="keywordflow">if</span> (iMarker == EOF) { |
|
273 <a name="l00263"></a>00263 <span class="keywordflow">return</span> EOF; |
|
274 <a name="l00264"></a>00264 } |
|
275 <a name="l00265"></a>00265 <span class="keywordflow">do</span> { |
|
276 <a name="l00266"></a>00266 iMarker = iNextByte(pFile); |
|
277 <a name="l00267"></a>00267 } <span class="keywordflow">while</span> (iMarker == 0xff); |
|
278 <a name="l00268"></a>00268 } <span class="keywordflow">while</span> (iMarker == 0x00); <span class="comment">/* repeat if ff/00 */</span> |
|
279 <a name="l00269"></a>00269 |
|
280 <a name="l00270"></a>00270 <span class="keywordflow">return</span> iMarker; |
|
281 <a name="l00271"></a>00271 } <span class="comment">/* end of iNextMarker */</span> |
|
282 <a name="l00272"></a>00272 |
|
283 <a name="l00273"></a>00273 <span class="comment">/*</span> |
|
284 <a name="l00274"></a>00274 <span class="comment"> * bExamineJPEG - Examine a JPEG header</span> |
|
285 <a name="l00275"></a>00275 <span class="comment"> *</span> |
|
286 <a name="l00276"></a>00276 <span class="comment"> * return TRUE if successful, otherwise FALSE</span> |
|
287 <a name="l00277"></a>00277 <span class="comment"> */</span> |
|
288 <a name="l00278"></a>00278 <span class="keyword">static</span> BOOL |
|
289 <a name="l00279"></a>00279 bExamineJPEG(FILE *pFile, imagedata_type *pImg) |
|
290 <a name="l00280"></a>00280 { |
|
291 <a name="l00281"></a>00281 <span class="keywordtype">size_t</span> tLength; |
|
292 <a name="l00282"></a>00282 <span class="keywordtype">int</span> iMarker, iIndex; |
|
293 <a name="l00283"></a>00283 <span class="keywordtype">char</span> appstring[10]; |
|
294 <a name="l00284"></a>00284 BOOL bSOFDone; |
|
295 <a name="l00285"></a>00285 |
|
296 <a name="l00286"></a>00286 tLength = 0; |
|
297 <a name="l00287"></a>00287 bSOFDone = FALSE; |
|
298 <a name="l00288"></a>00288 |
|
299 <a name="l00289"></a>00289 <span class="comment">/* process JPEG markers */</span> |
|
300 <a name="l00290"></a>00290 <span class="keywordflow">while</span> (!bSOFDone && (iMarker = iNextMarker(pFile)) != (<span class="keywordtype">int</span>)M_EOI) { |
|
301 <a name="l00291"></a>00291 <span class="keywordflow">switch</span> (iMarker) { |
|
302 <a name="l00292"></a>00292 <span class="keywordflow">case</span> EOF: |
|
303 <a name="l00293"></a>00293 DBG_MSG(<span class="stringliteral">"Error: unexpected end of JPEG file"</span>); |
|
304 <a name="l00294"></a>00294 <span class="keywordflow">return</span> FALSE; |
|
305 <a name="l00295"></a>00295 <span class="comment">/* The following are not officially supported in PostScript level 2 */</span> |
|
306 <a name="l00296"></a>00296 <span class="keywordflow">case</span> M_SOF2: |
|
307 <a name="l00297"></a>00297 <span class="keywordflow">case</span> M_SOF3: |
|
308 <a name="l00298"></a>00298 <span class="keywordflow">case</span> M_SOF5: |
|
309 <a name="l00299"></a>00299 <span class="keywordflow">case</span> M_SOF6: |
|
310 <a name="l00300"></a>00300 <span class="keywordflow">case</span> M_SOF7: |
|
311 <a name="l00301"></a>00301 <span class="keywordflow">case</span> M_SOF9: |
|
312 <a name="l00302"></a>00302 <span class="keywordflow">case</span> M_SOF10: |
|
313 <a name="l00303"></a>00303 <span class="keywordflow">case</span> M_SOF11: |
|
314 <a name="l00304"></a>00304 <span class="keywordflow">case</span> M_SOF13: |
|
315 <a name="l00305"></a>00305 <span class="keywordflow">case</span> M_SOF14: |
|
316 <a name="l00306"></a>00306 <span class="keywordflow">case</span> M_SOF15: |
|
317 <a name="l00307"></a>00307 DBG_HEX(iMarker); |
|
318 <a name="l00308"></a>00308 <span class="keywordflow">return</span> FALSE; |
|
319 <a name="l00309"></a>00309 <span class="keywordflow">case</span> M_SOF0: |
|
320 <a name="l00310"></a>00310 <span class="keywordflow">case</span> M_SOF1: |
|
321 <a name="l00311"></a>00311 tLength = (size_t)usNextWordBE(pFile); |
|
322 <a name="l00312"></a>00312 pImg->uiBitsPerComponent = (UINT)iNextByte(pFile); |
|
323 <a name="l00313"></a>00313 pImg->iHeight = (int)usNextWordBE(pFile); |
|
324 <a name="l00314"></a>00314 pImg->iWidth = (int)usNextWordBE(pFile); |
|
325 <a name="l00315"></a>00315 pImg->iComponents = iNextByte(pFile); |
|
326 <a name="l00316"></a>00316 bSOFDone = TRUE; |
|
327 <a name="l00317"></a>00317 <span class="keywordflow">break</span>; |
|
328 <a name="l00318"></a>00318 <span class="keywordflow">case</span> M_APP14: |
|
329 <a name="l00319"></a>00319 <span class="comment">/*</span> |
|
330 <a name="l00320"></a>00320 <span class="comment"> * Check for Adobe application marker. It is known (per Adobe's</span> |
|
331 <a name="l00321"></a>00321 <span class="comment"> * TN5116) to contain the string "Adobe" at the start of the</span> |
|
332 <a name="l00322"></a>00322 <span class="comment"> * APP14 marker.</span> |
|
333 <a name="l00323"></a>00323 <span class="comment"> */</span> |
|
334 <a name="l00324"></a>00324 tLength = (size_t)usNextWordBE(pFile); |
|
335 <a name="l00325"></a>00325 <span class="keywordflow">if</span> (tLength < 12) { |
|
336 <a name="l00326"></a>00326 (void)tSkipBytes(pFile, tLength - 2); |
|
337 <a name="l00327"></a>00327 } <span class="keywordflow">else</span> { |
|
338 <a name="l00328"></a>00328 <span class="keywordflow">for</span> (iIndex = 0; iIndex < 5; iIndex++) { |
|
339 <a name="l00329"></a>00329 appstring[iIndex] = |
|
340 <a name="l00330"></a>00330 (char)iNextByte(pFile); |
|
341 <a name="l00331"></a>00331 } |
|
342 <a name="l00332"></a>00332 appstring[5] = <span class="charliteral">'\0'</span>; |
|
343 <a name="l00333"></a>00333 <span class="keywordflow">if</span> (STREQ(appstring, <span class="stringliteral">"Adobe"</span>)) { |
|
344 <a name="l00334"></a>00334 pImg->bAdobe = TRUE; |
|
345 <a name="l00335"></a>00335 } |
|
346 <a name="l00336"></a>00336 (void)tSkipBytes(pFile, tLength - 7); |
|
347 <a name="l00337"></a>00337 } |
|
348 <a name="l00338"></a>00338 <span class="keywordflow">break</span>; |
|
349 <a name="l00339"></a>00339 <span class="keywordflow">case</span> M_SOI: <span class="comment">/* ignore markers without parameters */</span> |
|
350 <a name="l00340"></a>00340 <span class="keywordflow">case</span> M_EOI: |
|
351 <a name="l00341"></a>00341 <span class="keywordflow">case</span> M_TEM: |
|
352 <a name="l00342"></a>00342 <span class="keywordflow">case</span> M_RST0: |
|
353 <a name="l00343"></a>00343 <span class="keywordflow">case</span> M_RST1: |
|
354 <a name="l00344"></a>00344 <span class="keywordflow">case</span> M_RST2: |
|
355 <a name="l00345"></a>00345 <span class="keywordflow">case</span> M_RST3: |
|
356 <a name="l00346"></a>00346 <span class="keywordflow">case</span> M_RST4: |
|
357 <a name="l00347"></a>00347 <span class="keywordflow">case</span> M_RST5: |
|
358 <a name="l00348"></a>00348 <span class="keywordflow">case</span> M_RST6: |
|
359 <a name="l00349"></a>00349 <span class="keywordflow">case</span> M_RST7: |
|
360 <a name="l00350"></a>00350 <span class="keywordflow">break</span>; |
|
361 <a name="l00351"></a>00351 <span class="keywordflow">default</span>: <span class="comment">/* skip variable length markers */</span> |
|
362 <a name="l00352"></a>00352 tLength = (size_t)usNextWordBE(pFile); |
|
363 <a name="l00353"></a>00353 (void)tSkipBytes(pFile, tLength - 2); |
|
364 <a name="l00354"></a>00354 <span class="keywordflow">break</span>; |
|
365 <a name="l00355"></a>00355 } |
|
366 <a name="l00356"></a>00356 } |
|
367 <a name="l00357"></a>00357 |
|
368 <a name="l00358"></a>00358 DBG_DEC(pImg->iWidth); |
|
369 <a name="l00359"></a>00359 DBG_DEC(pImg->iHeight); |
|
370 <a name="l00360"></a>00360 DBG_DEC(pImg->uiBitsPerComponent); |
|
371 <a name="l00361"></a>00361 DBG_DEC(pImg->iComponents); |
|
372 <a name="l00362"></a>00362 |
|
373 <a name="l00363"></a>00363 <span class="comment">/* Do some sanity checks with the parameters */</span> |
|
374 <a name="l00364"></a>00364 <span class="keywordflow">if</span> (pImg->iHeight <= 0 || |
|
375 <a name="l00365"></a>00365 pImg->iWidth <= 0 || |
|
376 <a name="l00366"></a>00366 pImg->iComponents <= 0) { |
|
377 <a name="l00367"></a>00367 DBG_DEC(pImg->iHeight); |
|
378 <a name="l00368"></a>00368 DBG_DEC(pImg->iWidth); |
|
379 <a name="l00369"></a>00369 DBG_DEC(pImg->iComponents); |
|
380 <a name="l00370"></a>00370 <span class="keywordflow">return</span> FALSE; |
|
381 <a name="l00371"></a>00371 } |
|
382 <a name="l00372"></a>00372 |
|
383 <a name="l00373"></a>00373 <span class="comment">/* Some broken JPEG files have this but they print anyway... */</span> |
|
384 <a name="l00374"></a>00374 <span class="keywordflow">if</span> (pImg->iComponents * 3 + 8 != (<span class="keywordtype">int</span>)tLength) { |
|
385 <a name="l00375"></a>00375 DBG_MSG(<span class="stringliteral">"Warning: SOF marker has incorrect length - ignored"</span>); |
|
386 <a name="l00376"></a>00376 } |
|
387 <a name="l00377"></a>00377 |
|
388 <a name="l00378"></a>00378 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent != 8) { |
|
389 <a name="l00379"></a>00379 DBG_DEC(pImg->uiBitsPerComponent); |
|
390 <a name="l00380"></a>00380 DBG_MSG(<span class="stringliteral">"Not supported in PostScript level 2"</span>); |
|
391 <a name="l00381"></a>00381 <span class="keywordflow">return</span> FALSE; |
|
392 <a name="l00382"></a>00382 } |
|
393 <a name="l00383"></a>00383 |
|
394 <a name="l00384"></a>00384 <span class="keywordflow">if</span> (pImg->iComponents != 1 && |
|
395 <a name="l00385"></a>00385 pImg->iComponents != 3 && |
|
396 <a name="l00386"></a>00386 pImg->iComponents != 4) { |
|
397 <a name="l00387"></a>00387 DBG_DEC(pImg->iComponents); |
|
398 <a name="l00388"></a>00388 <span class="keywordflow">return</span> FALSE; |
|
399 <a name="l00389"></a>00389 } |
|
400 <a name="l00390"></a>00390 |
|
401 <a name="l00391"></a>00391 pImg->bColorImage = pImg->iComponents >= 3; |
|
402 <a name="l00392"></a>00392 pImg->iColorsUsed = 0; |
|
403 <a name="l00393"></a>00393 pImg->eCompression = compression_jpeg; |
|
404 <a name="l00394"></a>00394 |
|
405 <a name="l00395"></a>00395 <span class="keywordflow">return</span> TRUE; |
|
406 <a name="l00396"></a>00396 } <span class="comment">/* end of bExamineJPEG */</span> |
|
407 <a name="l00397"></a>00397 |
|
408 <a name="l00398"></a>00398 <span class="comment">/*</span> |
|
409 <a name="l00399"></a>00399 <span class="comment"> * bFillPalettePNG - fill the palette part of the imagesdata</span> |
|
410 <a name="l00400"></a>00400 <span class="comment"> *</span> |
|
411 <a name="l00401"></a>00401 <span class="comment"> * returns TRUE if sucessful, otherwise FALSE;</span> |
|
412 <a name="l00402"></a>00402 <span class="comment"> */</span> |
|
413 <a name="l00403"></a>00403 <span class="keyword">static</span> BOOL |
|
414 <a name="l00404"></a>00404 bFillPalettePNG(FILE *pFile, imagedata_type *pImg, <span class="keywordtype">size_t</span> tLength) |
|
415 <a name="l00405"></a>00405 { |
|
416 <a name="l00406"></a>00406 <span class="keywordtype">int</span> iIndex, iEntries; |
|
417 <a name="l00407"></a>00407 |
|
418 <a name="l00408"></a>00408 fail(pFile == NULL); |
|
419 <a name="l00409"></a>00409 fail(pImg == NULL); |
|
420 <a name="l00410"></a>00410 |
|
421 <a name="l00411"></a>00411 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent > 8) { |
|
422 <a name="l00412"></a>00412 <span class="comment">/* No palette, image uses more than 256 colors */</span> |
|
423 <a name="l00413"></a>00413 <span class="keywordflow">return</span> TRUE; |
|
424 <a name="l00414"></a>00414 } |
|
425 <a name="l00415"></a>00415 |
|
426 <a name="l00416"></a>00416 <span class="keywordflow">if</span> (!pImg->bColorImage) { |
|
427 <a name="l00417"></a>00417 <span class="comment">/* Only color images can have a palette */</span> |
|
428 <a name="l00418"></a>00418 <span class="keywordflow">return</span> FALSE; |
|
429 <a name="l00419"></a>00419 } |
|
430 <a name="l00420"></a>00420 |
|
431 <a name="l00421"></a>00421 <span class="keywordflow">if</span> (tLength % 3 != 0) { |
|
432 <a name="l00422"></a>00422 <span class="comment">/* Each palette entry takes three bytes */</span> |
|
433 <a name="l00423"></a>00423 DBG_DEC(tLength); |
|
434 <a name="l00424"></a>00424 <span class="keywordflow">return</span> FALSE; |
|
435 <a name="l00425"></a>00425 } |
|
436 <a name="l00426"></a>00426 |
|
437 <a name="l00427"></a>00427 iEntries = (int)(tLength / 3); |
|
438 <a name="l00428"></a>00428 DBG_DEC(iEntries); |
|
439 <a name="l00429"></a>00429 pImg->iColorsUsed = 1 << pImg->uiBitsPerComponent; |
|
440 <a name="l00430"></a>00430 DBG_DEC(pImg->iColorsUsed); |
|
441 <a name="l00431"></a>00431 |
|
442 <a name="l00432"></a>00432 <span class="keywordflow">if</span> (iEntries > 256) { |
|
443 <a name="l00433"></a>00433 DBG_DEC(iEntries); |
|
444 <a name="l00434"></a>00434 <span class="keywordflow">return</span> FALSE; |
|
445 <a name="l00435"></a>00435 } |
|
446 <a name="l00436"></a>00436 |
|
447 <a name="l00437"></a>00437 <span class="keywordflow">for</span> (iIndex = 0; iIndex < iEntries; iIndex++) { |
|
448 <a name="l00438"></a>00438 pImg->aucPalette[iIndex][0] = (UCHAR)iNextByte(pFile); |
|
449 <a name="l00439"></a>00439 pImg->aucPalette[iIndex][1] = (UCHAR)iNextByte(pFile); |
|
450 <a name="l00440"></a>00440 pImg->aucPalette[iIndex][2] = (UCHAR)iNextByte(pFile); |
|
451 <a name="l00441"></a>00441 NO_DBG_PRINT_BLOCK(pImg->aucPalette[iIndex], 3); |
|
452 <a name="l00442"></a>00442 } |
|
453 <a name="l00443"></a>00443 <span class="keywordflow">for</span> (;iIndex < pImg->iColorsUsed; iIndex++) { |
|
454 <a name="l00444"></a>00444 pImg->aucPalette[iIndex][0] = 0; |
|
455 <a name="l00445"></a>00445 pImg->aucPalette[iIndex][1] = 0; |
|
456 <a name="l00446"></a>00446 pImg->aucPalette[iIndex][2] = 0; |
|
457 <a name="l00447"></a>00447 } |
|
458 <a name="l00448"></a>00448 |
|
459 <a name="l00449"></a>00449 <span class="keywordflow">return</span> TRUE; |
|
460 <a name="l00450"></a>00450 } <span class="comment">/* end of bFillPalettePNG */</span> |
|
461 <a name="l00451"></a>00451 |
|
462 <a name="l00452"></a>00452 <span class="comment">/*</span> |
|
463 <a name="l00453"></a>00453 <span class="comment"> * bExaminePNG - Examine a PNG header</span> |
|
464 <a name="l00454"></a>00454 <span class="comment"> *</span> |
|
465 <a name="l00455"></a>00455 <span class="comment"> * return TRUE if successful, otherwise FALSE</span> |
|
466 <a name="l00456"></a>00456 <span class="comment"> */</span> |
|
467 <a name="l00457"></a>00457 <span class="keyword">static</span> BOOL |
|
468 <a name="l00458"></a>00458 bExaminePNG(FILE *pFile, imagedata_type *pImg) |
|
469 <a name="l00459"></a>00459 { |
|
470 <a name="l00460"></a>00460 <span class="keywordtype">size_t</span> tLength; |
|
471 <a name="l00461"></a>00461 ULONG ulLong1, ulLong2, ulName; |
|
472 <a name="l00462"></a>00462 <span class="keywordtype">int</span> iIndex, iTmp; |
|
473 <a name="l00463"></a>00463 <span class="keywordtype">int</span> iCompressionMethod, iFilterMethod, iInterlaceMethod; |
|
474 <a name="l00464"></a>00464 <span class="keywordtype">int</span> iColor, iIncrement; |
|
475 <a name="l00465"></a>00465 BOOL bHasPalette, bHasAlpha; |
|
476 <a name="l00466"></a>00466 UCHAR aucBuf[4]; |
|
477 <a name="l00467"></a>00467 |
|
478 <a name="l00468"></a>00468 <span class="comment">/* Check signature */</span> |
|
479 <a name="l00469"></a>00469 ulLong1 = ulNextLongBE(pFile); |
|
480 <a name="l00470"></a>00470 ulLong2 = ulNextLongBE(pFile); |
|
481 <a name="l00471"></a>00471 <span class="keywordflow">if</span> (ulLong1 != 0x89504e47UL || ulLong2 != 0x0d0a1a0aUL) { |
|
482 <a name="l00472"></a>00472 DBG_HEX(ulLong1); |
|
483 <a name="l00473"></a>00473 DBG_HEX(ulLong2); |
|
484 <a name="l00474"></a>00474 <span class="keywordflow">return</span> FALSE; |
|
485 <a name="l00475"></a>00475 } |
|
486 <a name="l00476"></a>00476 |
|
487 <a name="l00477"></a>00477 ulName = 0x00; |
|
488 <a name="l00478"></a>00478 bHasPalette = FALSE; |
|
489 <a name="l00479"></a>00479 |
|
490 <a name="l00480"></a>00480 <span class="comment">/* Examine chunks */</span> |
|
491 <a name="l00481"></a>00481 <span class="keywordflow">while</span> (ulName != PNG_CN_IEND) { |
|
492 <a name="l00482"></a>00482 tLength = (size_t)ulNextLongBE(pFile); |
|
493 <a name="l00483"></a>00483 ulName = 0x00; |
|
494 <a name="l00484"></a>00484 <span class="keywordflow">for</span> (iIndex = 0; iIndex < (int)elementsof(aucBuf); iIndex++) { |
|
495 <a name="l00485"></a>00485 aucBuf[iIndex] = (UCHAR)iNextByte(pFile); |
|
496 <a name="l00486"></a>00486 <span class="keywordflow">if</span> (!isalpha(aucBuf[iIndex])) { |
|
497 <a name="l00487"></a>00487 DBG_HEX(aucBuf[iIndex]); |
|
498 <a name="l00488"></a>00488 <span class="keywordflow">return</span> FALSE; |
|
499 <a name="l00489"></a>00489 } |
|
500 <a name="l00490"></a>00490 ulName <<= 8; |
|
501 <a name="l00491"></a>00491 ulName |= aucBuf[iIndex]; |
|
502 <a name="l00492"></a>00492 } |
|
503 <a name="l00493"></a>00493 |
|
504 <a name="l00494"></a>00494 <span class="keywordflow">switch</span> (ulName) { |
|
505 <a name="l00495"></a>00495 <span class="keywordflow">case</span> PNG_CN_IHDR: |
|
506 <a name="l00496"></a>00496 <span class="comment">/* Header chunck */</span> |
|
507 <a name="l00497"></a>00497 <span class="keywordflow">if</span> (tLength < 13) { |
|
508 <a name="l00498"></a>00498 DBG_DEC(tLength); |
|
509 <a name="l00499"></a>00499 <span class="keywordflow">return</span> FALSE; |
|
510 <a name="l00500"></a>00500 } |
|
511 <a name="l00501"></a>00501 pImg->iWidth = (int)ulNextLongBE(pFile); |
|
512 <a name="l00502"></a>00502 pImg->iHeight = (int)ulNextLongBE(pFile); |
|
513 <a name="l00503"></a>00503 pImg->uiBitsPerComponent = (UINT)iNextByte(pFile); |
|
514 <a name="l00504"></a>00504 iTmp = iNextByte(pFile); |
|
515 <a name="l00505"></a>00505 NO_DBG_HEX(iTmp); |
|
516 <a name="l00506"></a>00506 pImg->bColorImage = (iTmp & PNG_CB_COLOR) != 0; |
|
517 <a name="l00507"></a>00507 bHasPalette = (iTmp & PNG_CB_PALETTE) != 0; |
|
518 <a name="l00508"></a>00508 bHasAlpha = (iTmp & PNG_CB_ALPHA) != 0; |
|
519 <a name="l00509"></a>00509 <span class="keywordflow">if</span> (bHasPalette && pImg->uiBitsPerComponent > 8) { |
|
520 <a name="l00510"></a>00510 <span class="comment">/* This should not happen */</span> |
|
521 <a name="l00511"></a>00511 <span class="keywordflow">return</span> FALSE; |
|
522 <a name="l00512"></a>00512 } |
|
523 <a name="l00513"></a>00513 pImg->iComponents = |
|
524 <a name="l00514"></a>00514 (bHasPalette || !pImg->bColorImage) ? 1 : 3; |
|
525 <a name="l00515"></a>00515 <span class="keywordflow">if</span> (bHasAlpha) { |
|
526 <a name="l00516"></a>00516 pImg->iComponents++; |
|
527 <a name="l00517"></a>00517 } |
|
528 <a name="l00518"></a>00518 iCompressionMethod = iNextByte(pFile); |
|
529 <a name="l00519"></a>00519 <span class="keywordflow">if</span> (iCompressionMethod != 0) { |
|
530 <a name="l00520"></a>00520 DBG_DEC(iCompressionMethod); |
|
531 <a name="l00521"></a>00521 <span class="keywordflow">return</span> FALSE; |
|
532 <a name="l00522"></a>00522 } |
|
533 <a name="l00523"></a>00523 iFilterMethod = iNextByte(pFile); |
|
534 <a name="l00524"></a>00524 <span class="keywordflow">if</span> (iFilterMethod != 0) { |
|
535 <a name="l00525"></a>00525 DBG_DEC(iFilterMethod); |
|
536 <a name="l00526"></a>00526 <span class="keywordflow">return</span> FALSE; |
|
537 <a name="l00527"></a>00527 } |
|
538 <a name="l00528"></a>00528 iInterlaceMethod = iNextByte(pFile); |
|
539 <a name="l00529"></a>00529 <span class="keywordflow">if</span> (iInterlaceMethod != 0) { |
|
540 <a name="l00530"></a>00530 DBG_DEC(iInterlaceMethod); |
|
541 <a name="l00531"></a>00531 <span class="keywordflow">return</span> FALSE; |
|
542 <a name="l00532"></a>00532 } |
|
543 <a name="l00533"></a>00533 pImg->iColorsUsed = 0; |
|
544 <a name="l00534"></a>00534 (void)tSkipBytes(pFile, tLength - 13 + 4); |
|
545 <a name="l00535"></a>00535 <span class="keywordflow">break</span>; |
|
546 <a name="l00536"></a>00536 <span class="keywordflow">case</span> PNG_CN_PLTE: |
|
547 <a name="l00537"></a>00537 <span class="keywordflow">if</span> (!bHasPalette) { |
|
548 <a name="l00538"></a>00538 <span class="keywordflow">return</span> FALSE; |
|
549 <a name="l00539"></a>00539 } |
|
550 <a name="l00540"></a>00540 <span class="keywordflow">if</span> (!bFillPalettePNG(pFile, pImg, tLength)) { |
|
551 <a name="l00541"></a>00541 <span class="keywordflow">return</span> FALSE; |
|
552 <a name="l00542"></a>00542 } |
|
553 <a name="l00543"></a>00543 (void)tSkipBytes(pFile, 4); |
|
554 <a name="l00544"></a>00544 <span class="keywordflow">break</span>; |
|
555 <a name="l00545"></a>00545 <span class="keywordflow">default</span>: |
|
556 <a name="l00546"></a>00546 (void)tSkipBytes(pFile, tLength + 4); |
|
557 <a name="l00547"></a>00547 <span class="keywordflow">break</span>; |
|
558 <a name="l00548"></a>00548 } |
|
559 <a name="l00549"></a>00549 } |
|
560 <a name="l00550"></a>00550 |
|
561 <a name="l00551"></a>00551 DBG_DEC(pImg->iWidth); |
|
562 <a name="l00552"></a>00552 DBG_DEC(pImg->iHeight); |
|
563 <a name="l00553"></a>00553 DBG_DEC(pImg->uiBitsPerComponent); |
|
564 <a name="l00554"></a>00554 DBG_DEC(pImg->iColorsUsed); |
|
565 <a name="l00555"></a>00555 DBG_DEC(pImg->iComponents); |
|
566 <a name="l00556"></a>00556 |
|
567 <a name="l00557"></a>00557 <span class="comment">/* Do some sanity checks with the parameters */</span> |
|
568 <a name="l00558"></a>00558 <span class="keywordflow">if</span> (pImg->iWidth <= 0 || pImg->iHeight <= 0) { |
|
569 <a name="l00559"></a>00559 <span class="keywordflow">return</span> FALSE; |
|
570 <a name="l00560"></a>00560 } |
|
571 <a name="l00561"></a>00561 |
|
572 <a name="l00562"></a>00562 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent != 1 && pImg->uiBitsPerComponent != 2 && |
|
573 <a name="l00563"></a>00563 pImg->uiBitsPerComponent != 4 && pImg->uiBitsPerComponent != 8 && |
|
574 <a name="l00564"></a>00564 pImg->uiBitsPerComponent != 16) { |
|
575 <a name="l00565"></a>00565 DBG_DEC(pImg->uiBitsPerComponent); |
|
576 <a name="l00566"></a>00566 <span class="keywordflow">return</span> FALSE; |
|
577 <a name="l00567"></a>00567 } |
|
578 <a name="l00568"></a>00568 |
|
579 <a name="l00569"></a>00569 <span class="keywordflow">if</span> (pImg->iComponents != 1 && pImg->iComponents != 3) { |
|
580 <a name="l00570"></a>00570 <span class="comment">/* Not supported */</span> |
|
581 <a name="l00571"></a>00571 DBG_DEC(pImg->iComponents); |
|
582 <a name="l00572"></a>00572 <span class="keywordflow">return</span> FALSE; |
|
583 <a name="l00573"></a>00573 } |
|
584 <a name="l00574"></a>00574 |
|
585 <a name="l00575"></a>00575 <span class="keywordflow">if</span> (pImg->uiBitsPerComponent > 8) { |
|
586 <a name="l00576"></a>00576 <span class="comment">/* Not supported */</span> |
|
587 <a name="l00577"></a>00577 DBG_DEC(pImg->uiBitsPerComponent); |
|
588 <a name="l00578"></a>00578 <span class="keywordflow">return</span> FALSE; |
|
589 <a name="l00579"></a>00579 } |
|
590 <a name="l00580"></a>00580 |
|
591 <a name="l00581"></a>00581 <span class="keywordflow">if</span> (pImg->iColorsUsed == 0 && |
|
592 <a name="l00582"></a>00582 pImg->iComponents == 1 && |
|
593 <a name="l00583"></a>00583 pImg->uiBitsPerComponent <= 4) { |
|
594 <a name="l00584"></a>00584 <span class="comment">/*</span> |
|
595 <a name="l00585"></a>00585 <span class="comment"> * No palette is supplied, but PostScript needs one in these</span> |
|
596 <a name="l00586"></a>00586 <span class="comment"> * cases, so we add a default palette here</span> |
|
597 <a name="l00587"></a>00587 <span class="comment"> */</span> |
|
598 <a name="l00588"></a>00588 pImg->iColorsUsed = 1 << pImg->uiBitsPerComponent; |
|
599 <a name="l00589"></a>00589 iIncrement = 0xff / (pImg->iColorsUsed - 1); |
|
600 <a name="l00590"></a>00590 <span class="keywordflow">for</span> (iIndex = 0, iColor = 0x00; |
|
601 <a name="l00591"></a>00591 iIndex < pImg->iColorsUsed; |
|
602 <a name="l00592"></a>00592 iIndex++, iColor += iIncrement) { |
|
603 <a name="l00593"></a>00593 pImg->aucPalette[iIndex][0] = (UCHAR)iColor; |
|
604 <a name="l00594"></a>00594 pImg->aucPalette[iIndex][1] = (UCHAR)iColor; |
|
605 <a name="l00595"></a>00595 pImg->aucPalette[iIndex][2] = (UCHAR)iColor; |
|
606 <a name="l00596"></a>00596 } |
|
607 <a name="l00597"></a>00597 <span class="comment">/* Just to be sure */</span> |
|
608 <a name="l00598"></a>00598 pImg->bColorImage = FALSE; |
|
609 <a name="l00599"></a>00599 } |
|
610 <a name="l00600"></a>00600 |
|
611 <a name="l00601"></a>00601 pImg->eCompression = compression_zlib; |
|
612 <a name="l00602"></a>00602 |
|
613 <a name="l00603"></a>00603 <span class="keywordflow">return</span> TRUE; |
|
614 <a name="l00604"></a>00604 } <span class="comment">/* end of bExaminePNG */</span> |
|
615 <a name="l00605"></a>00605 |
|
616 <a name="l00606"></a>00606 <span class="comment">/*</span> |
|
617 <a name="l00607"></a>00607 <span class="comment"> * bExamineWMF - Examine a WMF header</span> |
|
618 <a name="l00608"></a>00608 <span class="comment"> *</span> |
|
619 <a name="l00609"></a>00609 <span class="comment"> * return TRUE if successful, otherwise FALSE</span> |
|
620 <a name="l00610"></a>00610 <span class="comment"> */</span> |
|
621 <a name="l00611"></a>00611 <span class="keyword">static</span> BOOL |
|
622 <a name="l00612"></a>00612 bExamineWMF(FILE *pFile, imagedata_type *pImg) |
|
623 <a name="l00613"></a>00613 { |
|
624 <a name="l00614"></a>00614 ULONG ulFileSize, ulMaxRecord, ulMagic; |
|
625 <a name="l00615"></a>00615 USHORT usType, usHeaderSize, usVersion, usNoObjects; |
|
626 <a name="l00616"></a>00616 |
|
627 <a name="l00617"></a>00617 usType = usNextWord(pFile); |
|
628 <a name="l00618"></a>00618 usHeaderSize = usNextWord(pFile); |
|
629 <a name="l00619"></a>00619 ulMagic = ((ULONG)usHeaderSize << 16) | (ULONG)usType; |
|
630 <a name="l00620"></a>00620 usVersion = usNextWord(pFile); |
|
631 <a name="l00621"></a>00621 ulFileSize = ulNextLong(pFile); |
|
632 <a name="l00622"></a>00622 usNoObjects = usNextWord(pFile); |
|
633 <a name="l00623"></a>00623 ulMaxRecord = ulNextLong(pFile); |
|
634 <a name="l00624"></a>00624 |
|
635 <a name="l00625"></a>00625 DBG_HEX(ulMagic); |
|
636 <a name="l00626"></a>00626 DBG_DEC(usType); |
|
637 <a name="l00627"></a>00627 DBG_DEC(usHeaderSize); |
|
638 <a name="l00628"></a>00628 DBG_HEX(usVersion); |
|
639 <a name="l00629"></a>00629 DBG_DEC(ulFileSize); |
|
640 <a name="l00630"></a>00630 DBG_DEC(usNoObjects); |
|
641 <a name="l00631"></a>00631 DBG_DEC(ulMaxRecord); |
|
642 <a name="l00632"></a>00632 |
|
643 <a name="l00633"></a>00633 <span class="keywordflow">return</span> FALSE; |
|
644 <a name="l00634"></a>00634 } <span class="comment">/* end of bExamineWMF */</span> |
|
645 <a name="l00635"></a>00635 |
|
646 <a name="l00636"></a>00636 <span class="preprocessor">#if !defined(__riscos)</span> |
|
647 <a name="l00637"></a>00637 <span class="preprocessor"></span><span class="comment">/*</span> |
|
648 <a name="l00638"></a>00638 <span class="comment"> * vImage2Papersize - make sure the image fits on the paper</span> |
|
649 <a name="l00639"></a>00639 <span class="comment"> *</span> |
|
650 <a name="l00640"></a>00640 <span class="comment"> * This function should not be needed if Word would do a proper job</span> |
|
651 <a name="l00641"></a>00641 <span class="comment"> */</span> |
|
652 <a name="l00642"></a>00642 <span class="keyword">static</span> <span class="keywordtype">void</span> |
|
653 <a name="l00643"></a>00643 vImage2Papersize(imagedata_type *pImg) |
|
654 <a name="l00644"></a>00644 { |
|
655 <a name="l00645"></a>00645 <span class="keyword">static</span> <span class="keywordtype">int</span> iNetPageHeight = -1; |
|
656 <a name="l00646"></a>00646 <span class="keyword">static</span> <span class="keywordtype">int</span> iNetPageWidth = -1; |
|
657 <a name="l00647"></a>00647 options_type tOptions; |
|
658 <a name="l00648"></a>00648 <span class="keywordtype">double</span> dVerFactor, dHorFactor, dFactor; |
|
659 <a name="l00649"></a>00649 |
|
660 <a name="l00650"></a>00650 DBG_MSG(<span class="stringliteral">"vImage2Papersize"</span>); |
|
661 <a name="l00651"></a>00651 |
|
662 <a name="l00652"></a>00652 fail(pImg == NULL); |
|
663 <a name="l00653"></a>00653 |
|
664 <a name="l00654"></a>00654 <span class="keywordflow">if</span> (iNetPageHeight < 0 || iNetPageWidth < 0) { |
|
665 <a name="l00655"></a>00655 <span class="comment">/* Get the page dimensions from the options */</span> |
|
666 <a name="l00656"></a>00656 vGetOptions(&tOptions); |
|
667 <a name="l00657"></a>00657 <span class="comment">/* Add 999 to err on the save side */</span> |
|
668 <a name="l00658"></a>00658 iNetPageHeight = tOptions.iPageHeight - |
|
669 <a name="l00659"></a>00659 (lDrawUnits2MilliPoints( |
|
670 <a name="l00660"></a>00660 PS_TOP_MARGIN + PS_BOTTOM_MARGIN) + |
|
671 <a name="l00661"></a>00661 999) / 1000; |
|
672 <a name="l00662"></a>00662 iNetPageWidth = tOptions.iPageWidth - |
|
673 <a name="l00663"></a>00663 (lDrawUnits2MilliPoints( |
|
674 <a name="l00664"></a>00664 PS_LEFT_MARGIN + PS_RIGHT_MARGIN) + |
|
675 <a name="l00665"></a>00665 999) / 1000; |
|
676 <a name="l00666"></a>00666 DBG_DEC(iNetPageHeight); |
|
677 <a name="l00667"></a>00667 DBG_DEC(iNetPageWidth); |
|
678 <a name="l00668"></a>00668 } |
|
679 <a name="l00669"></a>00669 |
|
680 <a name="l00670"></a>00670 <span class="keywordflow">if</span> (pImg->iVerSizeScaled < iNetPageHeight && |
|
681 <a name="l00671"></a>00671 pImg->iHorSizeScaled < iNetPageWidth) { |
|
682 <a name="l00672"></a>00672 <span class="comment">/* The image fits on the paper */</span> |
|
683 <a name="l00673"></a>00673 <span class="keywordflow">return</span>; |
|
684 <a name="l00674"></a>00674 } |
|
685 <a name="l00675"></a>00675 |
|
686 <a name="l00676"></a>00676 dVerFactor = (double)iNetPageHeight / (<span class="keywordtype">double</span>)pImg->iVerSizeScaled; |
|
687 <a name="l00677"></a>00677 dHorFactor = (double)iNetPageWidth / (<span class="keywordtype">double</span>)pImg->iHorSizeScaled; |
|
688 <a name="l00678"></a>00678 dFactor = min(dVerFactor, dHorFactor); |
|
689 <a name="l00679"></a>00679 DBG_FLT(dFactor); |
|
690 <a name="l00680"></a>00680 <span class="comment">/* Round down, just to be on the save side */</span> |
|
691 <a name="l00681"></a>00681 pImg->iVerSizeScaled = (int)(pImg->iVerSizeScaled * dFactor); |
|
692 <a name="l00682"></a>00682 pImg->iHorSizeScaled = (int)(pImg->iHorSizeScaled * dFactor); |
|
693 <a name="l00683"></a>00683 } <span class="comment">/* end of vImage2Papersize */</span> |
|
694 <a name="l00684"></a>00684 <span class="preprocessor">#endif </span><span class="comment">/* !__riscos */</span> |
|
695 <a name="l00685"></a>00685 |
|
696 <a name="l00686"></a>00686 <span class="comment">/*</span> |
|
697 <a name="l00687"></a>00687 <span class="comment"> * tFind6Image - skip until the image is found</span> |
|
698 <a name="l00688"></a>00688 <span class="comment"> *</span> |
|
699 <a name="l00689"></a>00689 <span class="comment"> * Find the image in Word 6/7 files</span> |
|
700 <a name="l00690"></a>00690 <span class="comment"> *</span> |
|
701 <a name="l00691"></a>00691 <span class="comment"> * returns the new position when a image is found, otherwise -1</span> |
|
702 <a name="l00692"></a>00692 <span class="comment"> */</span> |
|
703 <a name="l00693"></a>00693 <span class="keyword">static</span> <span class="keywordtype">size_t</span> |
|
704 <a name="l00694"></a>00694 tFind6Image(FILE *pFile, <span class="keywordtype">size_t</span> tPosition, <span class="keywordtype">size_t</span> tLength, |
|
705 <a name="l00695"></a>00695 imagetype_enum *peImageType) |
|
706 <a name="l00696"></a>00696 { |
|
707 <a name="l00697"></a>00697 ULONG ulMarker; |
|
708 <a name="l00698"></a>00698 <span class="keywordtype">size_t</span> tRecordLength, tToSkip; |
|
709 <a name="l00699"></a>00699 USHORT usMarker; |
|
710 <a name="l00700"></a>00700 |
|
711 <a name="l00701"></a>00701 fail(pFile == NULL); |
|
712 <a name="l00702"></a>00702 fail(peImageType == NULL); |
|
713 <a name="l00703"></a>00703 |
|
714 <a name="l00704"></a>00704 *peImageType = imagetype_is_unknown; |
|
715 <a name="l00705"></a>00705 <span class="keywordflow">if</span> (tPosition + 18 >= tLength) { |
|
716 <a name="l00706"></a>00706 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
717 <a name="l00707"></a>00707 } |
|
718 <a name="l00708"></a>00708 |
|
719 <a name="l00709"></a>00709 ulMarker = ulNextLong(pFile); |
|
720 <a name="l00710"></a>00710 <span class="keywordflow">if</span> (ulMarker != 0x00090001) { |
|
721 <a name="l00711"></a>00711 DBG_HEX(ulMarker); |
|
722 <a name="l00712"></a>00712 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
723 <a name="l00713"></a>00713 } |
|
724 <a name="l00714"></a>00714 usMarker = usNextWord(pFile); |
|
725 <a name="l00715"></a>00715 <span class="keywordflow">if</span> (usMarker != 0x0300) { |
|
726 <a name="l00716"></a>00716 DBG_HEX(usMarker); |
|
727 <a name="l00717"></a>00717 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
728 <a name="l00718"></a>00718 } |
|
729 <a name="l00719"></a>00719 (void)tSkipBytes(pFile, 10); |
|
730 <a name="l00720"></a>00720 usMarker = usNextWord(pFile); |
|
731 <a name="l00721"></a>00721 <span class="keywordflow">if</span> (usMarker != 0x0000) { |
|
732 <a name="l00722"></a>00722 DBG_HEX(usMarker); |
|
733 <a name="l00723"></a>00723 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
734 <a name="l00724"></a>00724 } |
|
735 <a name="l00725"></a>00725 tPosition += 18; |
|
736 <a name="l00726"></a>00726 |
|
737 <a name="l00727"></a>00727 <span class="keywordflow">while</span> (tPosition + 6 <= tLength) { |
|
738 <a name="l00728"></a>00728 tRecordLength = (size_t)ulNextLong(pFile); |
|
739 <a name="l00729"></a>00729 usMarker = usNextWord(pFile); |
|
740 <a name="l00730"></a>00730 tPosition += 6; |
|
741 <a name="l00731"></a>00731 NO_DBG_DEC(tRecordLength); |
|
742 <a name="l00732"></a>00732 NO_DBG_HEX(usMarker); |
|
743 <a name="l00733"></a>00733 <span class="keywordflow">switch</span> (usMarker) { |
|
744 <a name="l00734"></a>00734 <span class="keywordflow">case</span> 0x0000: |
|
745 <a name="l00735"></a>00735 DBG_HEX(ulGetDataOffset(pFile)); |
|
746 <a name="l00736"></a>00736 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
747 <a name="l00737"></a>00737 <span class="keywordflow">case</span> 0x0b41: |
|
748 <a name="l00738"></a>00738 DBG_MSG(<span class="stringliteral">"DIB"</span>); |
|
749 <a name="l00739"></a>00739 *peImageType = imagetype_is_dib; |
|
750 <a name="l00740"></a>00740 tPosition += tSkipBytes(pFile, 20); |
|
751 <a name="l00741"></a>00741 <span class="keywordflow">return</span> tPosition; |
|
752 <a name="l00742"></a>00742 <span class="keywordflow">case</span> 0x0f43: |
|
753 <a name="l00743"></a>00743 DBG_MSG(<span class="stringliteral">"DIB"</span>); |
|
754 <a name="l00744"></a>00744 *peImageType = imagetype_is_dib; |
|
755 <a name="l00745"></a>00745 tPosition += tSkipBytes(pFile, 22); |
|
756 <a name="l00746"></a>00746 <span class="keywordflow">return</span> tPosition; |
|
757 <a name="l00747"></a>00747 <span class="keywordflow">default</span>: |
|
758 <a name="l00748"></a>00748 <span class="keywordflow">if</span> (tRecordLength < 3) { |
|
759 <a name="l00749"></a>00749 <span class="keywordflow">break</span>; |
|
760 <a name="l00750"></a>00750 } |
|
761 <a name="l00751"></a>00751 <span class="keywordflow">if</span> (tRecordLength > SIZE_T_MAX / 2) { |
|
762 <a name="l00752"></a>00752 <span class="comment">/*</span> |
|
763 <a name="l00753"></a>00753 <span class="comment"> * No need to compute the number of bytes</span> |
|
764 <a name="l00754"></a>00754 <span class="comment"> * to skip</span> |
|
765 <a name="l00755"></a>00755 <span class="comment"> */</span> |
|
766 <a name="l00756"></a>00756 DBG_DEC(tRecordLength); |
|
767 <a name="l00757"></a>00757 DBG_HEX(tRecordLength); |
|
768 <a name="l00758"></a>00758 DBG_FIXME(); |
|
769 <a name="l00759"></a>00759 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
770 <a name="l00760"></a>00760 } |
|
771 <a name="l00761"></a>00761 tToSkip = tRecordLength * 2 - 6; |
|
772 <a name="l00762"></a>00762 <span class="keywordflow">if</span> (tToSkip > tLength - tPosition) { |
|
773 <a name="l00763"></a>00763 <span class="comment">/* You can't skip this number of bytes */</span> |
|
774 <a name="l00764"></a>00764 DBG_DEC(tToSkip); |
|
775 <a name="l00765"></a>00765 DBG_DEC(tLength - tPosition); |
|
776 <a name="l00766"></a>00766 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
777 <a name="l00767"></a>00767 } |
|
778 <a name="l00768"></a>00768 tPosition += tSkipBytes(pFile, tToSkip); |
|
779 <a name="l00769"></a>00769 <span class="keywordflow">break</span>; |
|
780 <a name="l00770"></a>00770 } |
|
781 <a name="l00771"></a>00771 } |
|
782 <a name="l00772"></a>00772 |
|
783 <a name="l00773"></a>00773 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
784 <a name="l00774"></a>00774 } <span class="comment">/* end of tFind6Image */</span> |
|
785 <a name="l00775"></a>00775 |
|
786 <a name="l00776"></a>00776 <span class="comment">/*</span> |
|
787 <a name="l00777"></a>00777 <span class="comment"> * tFind8Image - skip until the image is found</span> |
|
788 <a name="l00778"></a>00778 <span class="comment"> *</span> |
|
789 <a name="l00779"></a>00779 <span class="comment"> * Find the image in Word 8/9/10 files</span> |
|
790 <a name="l00780"></a>00780 <span class="comment"> *</span> |
|
791 <a name="l00781"></a>00781 <span class="comment"> * returns the new position when a image is found, otherwise -1</span> |
|
792 <a name="l00782"></a>00782 <span class="comment"> */</span> |
|
793 <a name="l00783"></a>00783 <span class="keyword">static</span> <span class="keywordtype">size_t</span> |
|
794 <a name="l00784"></a>00784 tFind8Image(FILE *pFile, <span class="keywordtype">size_t</span> tPosition, <span class="keywordtype">size_t</span> tLength, |
|
795 <a name="l00785"></a>00785 imagetype_enum *peImageType) |
|
796 <a name="l00786"></a>00786 { |
|
797 <a name="l00787"></a>00787 <span class="keywordtype">size_t</span> tRecordLength, tNameLen; |
|
798 <a name="l00788"></a>00788 USHORT usRecordVersion, usRecordType, usRecordInstance; |
|
799 <a name="l00789"></a>00789 USHORT usTmp; |
|
800 <a name="l00790"></a>00790 |
|
801 <a name="l00791"></a>00791 fail(pFile == NULL); |
|
802 <a name="l00792"></a>00792 fail(peImageType == NULL); |
|
803 <a name="l00793"></a>00793 |
|
804 <a name="l00794"></a>00794 *peImageType = imagetype_is_unknown; |
|
805 <a name="l00795"></a>00795 <span class="keywordflow">while</span> (tPosition + 8 <= tLength) { |
|
806 <a name="l00796"></a>00796 usTmp = usNextWord(pFile); |
|
807 <a name="l00797"></a>00797 usRecordVersion = usTmp & 0x000f; |
|
808 <a name="l00798"></a>00798 usRecordInstance = usTmp >> 4; |
|
809 <a name="l00799"></a>00799 usRecordType = usNextWord(pFile); |
|
810 <a name="l00800"></a>00800 tRecordLength = (size_t)ulNextLong(pFile); |
|
811 <a name="l00801"></a>00801 tPosition += 8; |
|
812 <a name="l00802"></a>00802 NO_DBG_HEX(usRecordVersion); |
|
813 <a name="l00803"></a>00803 NO_DBG_HEX(usRecordInstance); |
|
814 <a name="l00804"></a>00804 NO_DBG_HEX(usRecordType); |
|
815 <a name="l00805"></a>00805 NO_DBG_DEC(tRecordLength); |
|
816 <a name="l00806"></a>00806 <span class="keywordflow">switch</span> (usRecordType) { |
|
817 <a name="l00807"></a>00807 <span class="keywordflow">case</span> 0xf000: <span class="keywordflow">case</span> 0xf001: <span class="keywordflow">case</span> 0xf002: <span class="keywordflow">case</span> 0xf003: |
|
818 <a name="l00808"></a>00808 <span class="keywordflow">case</span> 0xf004: <span class="keywordflow">case</span> 0xf005: |
|
819 <a name="l00809"></a>00809 <span class="keywordflow">break</span>; |
|
820 <a name="l00810"></a>00810 <span class="keywordflow">case</span> 0xf007: |
|
821 <a name="l00811"></a>00811 tPosition += tSkipBytes(pFile, 33); |
|
822 <a name="l00812"></a>00812 tNameLen = (size_t)iNextByte(pFile); |
|
823 <a name="l00813"></a>00813 tPosition++; |
|
824 <a name="l00814"></a>00814 DBG_DEC_C(tNameLen != 0, tNameLen); |
|
825 <a name="l00815"></a>00815 tPosition += tSkipBytes(pFile, 2 + tNameLen * 2); |
|
826 <a name="l00816"></a>00816 <span class="keywordflow">break</span>; |
|
827 <a name="l00817"></a>00817 <span class="keywordflow">case</span> 0xf008: |
|
828 <a name="l00818"></a>00818 tPosition += tSkipBytes(pFile, 8); |
|
829 <a name="l00819"></a>00819 <span class="keywordflow">break</span>; |
|
830 <a name="l00820"></a>00820 <span class="keywordflow">case</span> 0xf009: |
|
831 <a name="l00821"></a>00821 tPosition += tSkipBytes(pFile, 16); |
|
832 <a name="l00822"></a>00822 <span class="keywordflow">break</span>; |
|
833 <a name="l00823"></a>00823 <span class="keywordflow">case</span> 0xf006: <span class="keywordflow">case</span> 0xf00a: <span class="keywordflow">case</span> 0xf00b: <span class="keywordflow">case</span> 0xf00d: |
|
834 <a name="l00824"></a>00824 <span class="keywordflow">case</span> 0xf00e: <span class="keywordflow">case</span> 0xf00f: <span class="keywordflow">case</span> 0xf010: <span class="keywordflow">case</span> 0xf011: |
|
835 <a name="l00825"></a>00825 <span class="keywordflow">case</span> 0xf122: |
|
836 <a name="l00826"></a>00826 tPosition += tSkipBytes(pFile, tRecordLength); |
|
837 <a name="l00827"></a>00827 <span class="keywordflow">break</span>; |
|
838 <a name="l00828"></a>00828 <span class="keywordflow">case</span> 0xf01a: |
|
839 <a name="l00829"></a>00829 DBG_MSG(<span class="stringliteral">"EMF"</span>); |
|
840 <a name="l00830"></a>00830 *peImageType = imagetype_is_emf; |
|
841 <a name="l00831"></a>00831 tPosition += tSkipBytes(pFile, 50); |
|
842 <a name="l00832"></a>00832 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_EMF) == 1) { |
|
843 <a name="l00833"></a>00833 tPosition += tSkipBytes(pFile, 16); |
|
844 <a name="l00834"></a>00834 } |
|
845 <a name="l00835"></a>00835 <span class="keywordflow">return</span> tPosition; |
|
846 <a name="l00836"></a>00836 <span class="keywordflow">case</span> 0xf01b: |
|
847 <a name="l00837"></a>00837 DBG_MSG(<span class="stringliteral">"WMF"</span>); |
|
848 <a name="l00838"></a>00838 *peImageType = imagetype_is_wmf; |
|
849 <a name="l00839"></a>00839 tPosition += tSkipBytes(pFile, 50); |
|
850 <a name="l00840"></a>00840 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_WMF) == 1) { |
|
851 <a name="l00841"></a>00841 tPosition += tSkipBytes(pFile, 16); |
|
852 <a name="l00842"></a>00842 } |
|
853 <a name="l00843"></a>00843 <span class="keywordflow">return</span> tPosition; |
|
854 <a name="l00844"></a>00844 <span class="keywordflow">case</span> 0xf01c: |
|
855 <a name="l00845"></a>00845 DBG_MSG(<span class="stringliteral">"PICT"</span>); |
|
856 <a name="l00846"></a>00846 *peImageType = imagetype_is_pict; |
|
857 <a name="l00847"></a>00847 tPosition += tSkipBytes(pFile, 50); |
|
858 <a name="l00848"></a>00848 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_PICT) == 1) { |
|
859 <a name="l00849"></a>00849 tPosition += tSkipBytes(pFile, 16); |
|
860 <a name="l00850"></a>00850 } |
|
861 <a name="l00851"></a>00851 <span class="keywordflow">return</span> tPosition; |
|
862 <a name="l00852"></a>00852 <span class="keywordflow">case</span> 0xf01d: |
|
863 <a name="l00853"></a>00853 DBG_MSG(<span class="stringliteral">"JPEG"</span>); |
|
864 <a name="l00854"></a>00854 *peImageType = imagetype_is_jpeg; |
|
865 <a name="l00855"></a>00855 tPosition += tSkipBytes(pFile, 17); |
|
866 <a name="l00856"></a>00856 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_JPEG) == 1) { |
|
867 <a name="l00857"></a>00857 tPosition += tSkipBytes(pFile, 16); |
|
868 <a name="l00858"></a>00858 } |
|
869 <a name="l00859"></a>00859 <span class="keywordflow">return</span> tPosition; |
|
870 <a name="l00860"></a>00860 <span class="keywordflow">case</span> 0xf01e: |
|
871 <a name="l00861"></a>00861 DBG_MSG(<span class="stringliteral">"PNG"</span>); |
|
872 <a name="l00862"></a>00862 *peImageType = imagetype_is_png; |
|
873 <a name="l00863"></a>00863 tPosition += tSkipBytes(pFile, 17); |
|
874 <a name="l00864"></a>00864 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_PNG) == 1) { |
|
875 <a name="l00865"></a>00865 tPosition += tSkipBytes(pFile, 16); |
|
876 <a name="l00866"></a>00866 } |
|
877 <a name="l00867"></a>00867 <span class="keywordflow">return</span> tPosition; |
|
878 <a name="l00868"></a>00868 <span class="keywordflow">case</span> 0xf01f: |
|
879 <a name="l00869"></a>00869 DBG_MSG(<span class="stringliteral">"DIB"</span>); |
|
880 <a name="l00870"></a>00870 <span class="comment">/* DIB is a BMP minus its 14 byte header */</span> |
|
881 <a name="l00871"></a>00871 *peImageType = imagetype_is_dib; |
|
882 <a name="l00872"></a>00872 tPosition += tSkipBytes(pFile, 17); |
|
883 <a name="l00873"></a>00873 <span class="keywordflow">if</span> ((usRecordInstance ^ MSOBI_DIB) == 1) { |
|
884 <a name="l00874"></a>00874 tPosition += tSkipBytes(pFile, 16); |
|
885 <a name="l00875"></a>00875 } |
|
886 <a name="l00876"></a>00876 <span class="keywordflow">return</span> tPosition; |
|
887 <a name="l00877"></a>00877 <span class="keywordflow">case</span> 0xf00c: |
|
888 <a name="l00878"></a>00878 <span class="keywordflow">default</span>: |
|
889 <a name="l00879"></a>00879 DBG_HEX(usRecordType); |
|
890 <a name="l00880"></a>00880 DBG_DEC_C(tRecordLength % 4 != 0, tRecordLength); |
|
891 <a name="l00881"></a>00881 DBG_FIXME(); |
|
892 <a name="l00882"></a>00882 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
893 <a name="l00883"></a>00883 } |
|
894 <a name="l00884"></a>00884 } |
|
895 <a name="l00885"></a>00885 |
|
896 <a name="l00886"></a>00886 <span class="keywordflow">return</span> (<span class="keywordtype">size_t</span>)-1; |
|
897 <a name="l00887"></a>00887 } <span class="comment">/* end of tFind8Image */</span> |
|
898 <a name="l00888"></a>00888 |
|
899 <a name="l00889"></a>00889 <span class="comment">/*</span> |
|
900 <a name="l00890"></a>00890 <span class="comment"> * eExamineImage - Examine the image</span> |
|
901 <a name="l00891"></a>00891 <span class="comment"> *</span> |
|
902 <a name="l00892"></a>00892 <span class="comment"> * Returns an indication of the amount of information found</span> |
|
903 <a name="l00893"></a>00893 <span class="comment"> */</span> |
|
904 <a name="l00894"></a>00894 image_info_enum |
|
905 <a name="l00895"></a>00895 eExamineImage(FILE *pFile, ULONG ulFileOffsetImage, imagedata_type *pImg) |
|
906 <a name="l00896"></a>00896 { |
|
907 <a name="l00897"></a>00897 <span class="keywordtype">long</span> lTmp; |
|
908 <a name="l00898"></a>00898 <span class="keywordtype">size_t</span> tWordHeaderLen, tLength, tPos; |
|
909 <a name="l00899"></a>00899 <span class="keywordtype">int</span> iType, iHorSize, iVerSize; |
|
910 <a name="l00900"></a>00900 USHORT usHorScalingFactor, usVerScalingFactor; |
|
911 <a name="l00901"></a>00901 |
|
912 <a name="l00902"></a>00902 <span class="keywordflow">if</span> (ulFileOffsetImage == FC_INVALID) { |
|
913 <a name="l00903"></a>00903 <span class="keywordflow">return</span> image_no_information; |
|
914 <a name="l00904"></a>00904 } |
|
915 <a name="l00905"></a>00905 DBG_HEX(ulFileOffsetImage); |
|
916 <a name="l00906"></a>00906 |
|
917 <a name="l00907"></a>00907 <span class="keywordflow">if</span> (!bSetDataOffset(pFile, ulFileOffsetImage)) { |
|
918 <a name="l00908"></a>00908 <span class="keywordflow">return</span> image_no_information; |
|
919 <a name="l00909"></a>00909 } |
|
920 <a name="l00910"></a>00910 |
|
921 <a name="l00911"></a>00911 tLength = (size_t)ulNextLong(pFile); |
|
922 <a name="l00912"></a>00912 DBG_DEC(tLength); |
|
923 <a name="l00913"></a>00913 <span class="keywordflow">if</span> (tLength < 46) { |
|
924 <a name="l00914"></a>00914 <span class="comment">/* Smaller than the smallest known header */</span> |
|
925 <a name="l00915"></a>00915 DBG_FIXME(); |
|
926 <a name="l00916"></a>00916 <span class="keywordflow">return</span> image_no_information; |
|
927 <a name="l00917"></a>00917 } |
|
928 <a name="l00918"></a>00918 tWordHeaderLen = (size_t)usNextWord(pFile); |
|
929 <a name="l00919"></a>00919 DBG_DEC(tWordHeaderLen); |
|
930 <a name="l00920"></a>00920 fail(tWordHeaderLen != 46 && |
|
931 <a name="l00921"></a>00921 tWordHeaderLen != 58 && |
|
932 <a name="l00922"></a>00922 tWordHeaderLen != 68); |
|
933 <a name="l00923"></a>00923 |
|
934 <a name="l00924"></a>00924 <span class="keywordflow">if</span> (tLength < tWordHeaderLen) { |
|
935 <a name="l00925"></a>00925 <span class="comment">/* Smaller than the current header */</span> |
|
936 <a name="l00926"></a>00926 <span class="keywordflow">return</span> image_no_information; |
|
937 <a name="l00927"></a>00927 } |
|
938 <a name="l00928"></a>00928 iType = (int)usNextWord(pFile); |
|
939 <a name="l00929"></a>00929 DBG_DEC(iType); |
|
940 <a name="l00930"></a>00930 (void)tSkipBytes(pFile, 28 - 8); |
|
941 <a name="l00931"></a>00931 |
|
942 <a name="l00932"></a>00932 lTmp = lTwips2MilliPoints(usNextWord(pFile)); |
|
943 <a name="l00933"></a>00933 iHorSize = (int)(lTmp / 1000); |
|
944 <a name="l00934"></a>00934 <span class="keywordflow">if</span> (lTmp % 1000 != 0) { |
|
945 <a name="l00935"></a>00935 iHorSize++; |
|
946 <a name="l00936"></a>00936 } |
|
947 <a name="l00937"></a>00937 DBG_DEC(iHorSize); |
|
948 <a name="l00938"></a>00938 lTmp = lTwips2MilliPoints(usNextWord(pFile)); |
|
949 <a name="l00939"></a>00939 iVerSize = (int)(lTmp / 1000); |
|
950 <a name="l00940"></a>00940 <span class="keywordflow">if</span> (lTmp % 1000 != 0) { |
|
951 <a name="l00941"></a>00941 iVerSize++; |
|
952 <a name="l00942"></a>00942 } |
|
953 <a name="l00943"></a>00943 DBG_DEC(iVerSize); |
|
954 <a name="l00944"></a>00944 |
|
955 <a name="l00945"></a>00945 usHorScalingFactor = usNextWord(pFile); |
|
956 <a name="l00946"></a>00946 DBG_DEC(usHorScalingFactor); |
|
957 <a name="l00947"></a>00947 usVerScalingFactor = usNextWord(pFile); |
|
958 <a name="l00948"></a>00948 DBG_DEC(usVerScalingFactor); |
|
959 <a name="l00949"></a>00949 |
|
960 <a name="l00950"></a>00950 <span class="comment">/* Sanity checks */</span> |
|
961 <a name="l00951"></a>00951 lTmp = (long)iHorSize * (<span class="keywordtype">long</span>)usHorScalingFactor; |
|
962 <a name="l00952"></a>00952 <span class="keywordflow">if</span> (lTmp < 2835) { |
|
963 <a name="l00953"></a>00953 <span class="comment">/* This image would be less than 1 millimeter wide */</span> |
|
964 <a name="l00954"></a>00954 DBG_DEC(lTmp); |
|
965 <a name="l00955"></a>00955 <span class="keywordflow">return</span> image_no_information; |
|
966 <a name="l00956"></a>00956 } |
|
967 <a name="l00957"></a>00957 lTmp = (long)iVerSize * (<span class="keywordtype">long</span>)usVerScalingFactor; |
|
968 <a name="l00958"></a>00958 <span class="keywordflow">if</span> (lTmp < 2835) { |
|
969 <a name="l00959"></a>00959 <span class="comment">/* This image would be less than 1 millimeter high */</span> |
|
970 <a name="l00960"></a>00960 DBG_DEC(lTmp); |
|
971 <a name="l00961"></a>00961 <span class="keywordflow">return</span> image_no_information; |
|
972 <a name="l00962"></a>00962 } |
|
973 <a name="l00963"></a>00963 |
|
974 <a name="l00964"></a>00964 <span class="comment">/* Skip the rest of the header */</span> |
|
975 <a name="l00965"></a>00965 (void)tSkipBytes(pFile, tWordHeaderLen - 36); |
|
976 <a name="l00966"></a>00966 tPos = tWordHeaderLen; |
|
977 <a name="l00967"></a>00967 |
|
978 <a name="l00968"></a>00968 (void)memset(pImg, 0, <span class="keyword">sizeof</span>(*pImg)); |
|
979 <a name="l00969"></a>00969 |
|
980 <a name="l00970"></a>00970 <span class="keywordflow">switch</span> (iType) { |
|
981 <a name="l00971"></a>00971 <span class="keywordflow">case</span> 7: |
|
982 <a name="l00972"></a>00972 <span class="keywordflow">case</span> 8: |
|
983 <a name="l00973"></a>00973 tPos = tFind6Image(pFile, tPos, tLength, &pImg->eImageType); |
|
984 <a name="l00974"></a>00974 <span class="keywordflow">if</span> (tPos == (<span class="keywordtype">size_t</span>)-1) { |
|
985 <a name="l00975"></a>00975 <span class="comment">/* No image found */</span> |
|
986 <a name="l00976"></a>00976 <span class="keywordflow">return</span> image_no_information; |
|
987 <a name="l00977"></a>00977 } |
|
988 <a name="l00978"></a>00978 DBG_HEX(tPos); |
|
989 <a name="l00979"></a>00979 <span class="keywordflow">break</span>; |
|
990 <a name="l00980"></a>00980 <span class="keywordflow">case</span> 94: <span class="comment">/* Word 6/7, no image just a pathname */</span> |
|
991 <a name="l00981"></a>00981 pImg->eImageType = imagetype_is_external; |
|
992 <a name="l00982"></a>00982 DBG_HEX(ulFileOffsetImage + tPos); |
|
993 <a name="l00983"></a>00983 <span class="keywordflow">break</span>; |
|
994 <a name="l00984"></a>00984 <span class="keywordflow">case</span> 100: |
|
995 <a name="l00985"></a>00985 tPos = tFind8Image(pFile, tPos, tLength, &pImg->eImageType); |
|
996 <a name="l00986"></a>00986 <span class="keywordflow">if</span> (tPos == (<span class="keywordtype">size_t</span>)-1) { |
|
997 <a name="l00987"></a>00987 <span class="comment">/* No image found */</span> |
|
998 <a name="l00988"></a>00988 <span class="keywordflow">return</span> image_no_information; |
|
999 <a name="l00989"></a>00989 } |
|
1000 <a name="l00990"></a>00990 DBG_HEX(tPos); |
|
1001 <a name="l00991"></a>00991 <span class="keywordflow">break</span>; |
|
1002 <a name="l00992"></a>00992 <span class="keywordflow">case</span> 102: <span class="comment">/* Word 8/9/10, no image just a pathname or URL */</span> |
|
1003 <a name="l00993"></a>00993 pImg->eImageType = imagetype_is_external; |
|
1004 <a name="l00994"></a>00994 DBG_HEX(ulFileOffsetImage + tPos); |
|
1005 <a name="l00995"></a>00995 <span class="keywordflow">break</span>; |
|
1006 <a name="l00996"></a>00996 <span class="keywordflow">default</span>: |
|
1007 <a name="l00997"></a>00997 DBG_DEC(iType); |
|
1008 <a name="l00998"></a>00998 DBG_HEX(ulFileOffsetImage + tPos); |
|
1009 <a name="l00999"></a>00999 DBG_FIXME(); |
|
1010 <a name="l01000"></a>01000 <span class="keywordflow">return</span> image_no_information; |
|
1011 <a name="l01001"></a>01001 } |
|
1012 <a name="l01002"></a>01002 |
|
1013 <a name="l01003"></a>01003 <span class="comment">/* Minimal information is now available */</span> |
|
1014 <a name="l01004"></a>01004 pImg->tLength = tLength; |
|
1015 <a name="l01005"></a>01005 pImg->tPosition = tPos; |
|
1016 <a name="l01006"></a>01006 pImg->iHorSizeScaled = |
|
1017 <a name="l01007"></a>01007 (int)(((<span class="keywordtype">long</span>)iHorSize * (<span class="keywordtype">long</span>)usHorScalingFactor + 500) / 1000); |
|
1018 <a name="l01008"></a>01008 pImg->iVerSizeScaled = |
|
1019 <a name="l01009"></a>01009 (int)(((<span class="keywordtype">long</span>)iVerSize * (long)usVerScalingFactor + 500) / 1000); |
|
1020 <a name="l01010"></a>01010 <span class="preprocessor">#if !defined(__riscos)</span> |
|
1021 <a name="l01011"></a>01011 <span class="preprocessor"></span> vImage2Papersize(pImg); |
|
1022 <a name="l01012"></a>01012 <span class="preprocessor">#endif </span><span class="comment">/* !__riscos */</span> |
|
1023 <a name="l01013"></a>01013 |
|
1024 <a name="l01014"></a>01014 <span class="comment">/* Image type specific examinations */</span> |
|
1025 <a name="l01015"></a>01015 <span class="keywordflow">switch</span> (pImg->eImageType) { |
|
1026 <a name="l01016"></a>01016 <span class="keywordflow">case</span> imagetype_is_dib: |
|
1027 <a name="l01017"></a>01017 <span class="keywordflow">if</span> (bExamineDIB(pFile, pImg)) { |
|
1028 <a name="l01018"></a>01018 <span class="keywordflow">return</span> image_full_information; |
|
1029 <a name="l01019"></a>01019 } |
|
1030 <a name="l01020"></a>01020 <span class="keywordflow">return</span> image_minimal_information; |
|
1031 <a name="l01021"></a>01021 <span class="keywordflow">case</span> imagetype_is_jpeg: |
|
1032 <a name="l01022"></a>01022 <span class="keywordflow">if</span> (bExamineJPEG(pFile, pImg)) { |
|
1033 <a name="l01023"></a>01023 <span class="keywordflow">return</span> image_full_information; |
|
1034 <a name="l01024"></a>01024 } |
|
1035 <a name="l01025"></a>01025 <span class="keywordflow">return</span> image_minimal_information; |
|
1036 <a name="l01026"></a>01026 <span class="keywordflow">case</span> imagetype_is_png: |
|
1037 <a name="l01027"></a>01027 <span class="keywordflow">if</span> (bExaminePNG(pFile, pImg)) { |
|
1038 <a name="l01028"></a>01028 <span class="keywordflow">return</span> image_full_information; |
|
1039 <a name="l01029"></a>01029 } |
|
1040 <a name="l01030"></a>01030 <span class="keywordflow">return</span> image_minimal_information; |
|
1041 <a name="l01031"></a>01031 <span class="keywordflow">case</span> imagetype_is_wmf: |
|
1042 <a name="l01032"></a>01032 <span class="keywordflow">if</span> (bExamineWMF(pFile, pImg)) { |
|
1043 <a name="l01033"></a>01033 <span class="keywordflow">return</span> image_full_information; |
|
1044 <a name="l01034"></a>01034 } |
|
1045 <a name="l01035"></a>01035 <span class="keywordflow">return</span> image_minimal_information; |
|
1046 <a name="l01036"></a>01036 <span class="keywordflow">case</span> imagetype_is_emf: |
|
1047 <a name="l01037"></a>01037 <span class="keywordflow">case</span> imagetype_is_pict: |
|
1048 <a name="l01038"></a>01038 <span class="keywordflow">case</span> imagetype_is_external: |
|
1049 <a name="l01039"></a>01039 <span class="keywordflow">return</span> image_minimal_information; |
|
1050 <a name="l01040"></a>01040 <span class="keywordflow">case</span> imagetype_is_unknown: |
|
1051 <a name="l01041"></a>01041 <span class="keywordflow">default</span>: |
|
1052 <a name="l01042"></a>01042 <span class="keywordflow">return</span> image_no_information; |
|
1053 <a name="l01043"></a>01043 } |
|
1054 <a name="l01044"></a>01044 } <span class="comment">/* end of eExamineImage */</span> |
|
1055 </pre></div></div> |
|
1056 <hr size="1"/><address style="text-align: right;"><small>Generated by |
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1057 <a href="http://www.doxygen.org/index.html"> |
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1058 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> |
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1059 </body> |
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1060 </html> |
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