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1 /** convertMap.h |
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2 |
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3 Functions for converting from one Map form to another |
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4 and extracting smaller maps. There are four polymorphic |
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5 functions. The general format is |
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6 |
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7 convertMap(MapType * source,MapType * target, Point ul, Point lr) |
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8 |
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9 MapTypes can be - BitMap or RLEMap, |
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10 source - the map to be converted from |
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11 target - The map to be converted to. Memory will be allocated |
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12 for target's contents. |
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13 ul and lr mark a range to copy. If both are the global var NOPNT |
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14 the entire map will be copied. |
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15 |
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16 Functions return a MapStatus which will be VALID or OTHERERROR |
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17 if there was an error in the conversion. An error might be due |
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18 to a user specifying an out of range ul and lr |
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19 |
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20 **************************************************************/ |
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21 #include "system.h" |
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22 #include "Point.h" |
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23 #include "BitMap.h" |
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24 #include "RLEMap.h" |
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25 #include "convertMap.h" |
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26 |
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27 /**** BitMap Conversion ***/ |
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28 |
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29 MapStatus convertMap(BitMap * source, RLEMap * target, Point ul, Point lr) |
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30 /*-------------------------------------------------------------- |
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31 Primary Purpose: Convert a bitMap to a RLEMap |
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32 Arguments: Right now just does full bit map coversion ul/lr dont work |
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33 Return Value: Returns valid if copy did not encounter any errors. |
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34 Effects: |
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35 Constraints: target is a pointer to an RLEMap |
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36 Rev: 10/24/95 |
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37 ---------------------------------------------------------------*/ |
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38 { |
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39 |
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40 uchar * rowdata; |
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41 int numChars; |
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42 |
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43 assert(target != NULL); // target must be allocated with new RLEMap |
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44 // before being passed to this function. |
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45 assert(source !=NULL); |
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46 target->imageWidth() = source->imageWidth(); |
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47 target->imageLength() = source->imageLength(); |
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48 target->status() = source->status(); |
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49 |
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50 target->fMapData = new (RLEPairs*)[target->imageLength()]; |
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51 for (int i = 0; i < source->imageLength(); i++) |
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52 { |
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53 |
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54 numChars= source->imageWidth() /8 + 1; // number of char entries |
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55 // Create a list of RLEPairs for this row and fill with buffer data |
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56 |
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57 rowdata = source->row(i); |
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58 |
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59 target->fMapData[i] = new RLEPairs(i); |
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60 target->fMapData[i]->fill(rowdata, numChars, i); |
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61 |
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62 } |
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63 |
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64 |
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65 return VALID; |
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66 } |
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67 |
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68 |
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69 |
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70 /**** RLEMap Conversion ***/ |
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71 MapStatus convertMap(RLEMap * source, BitMap * target, Point ul, Point lr) |
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72 /*-------------------------------------------------------------- |
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73 Purpose: Converts an RLEMap to a BitMap; |
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74 Arguments: Right now just does full bit map coversion ul/lr dont work |
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75 Return Value: Returns valid if copy did not encounter any errors. |
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76 Effects: |
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77 Constraints: target is a pointer to a BitMap which must be previously |
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78 allocated with new BitMap; |
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79 Rev: 10/24/95 |
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80 ---------------------------------------------------------------*/ |
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81 { |
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82 |
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83 |
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84 RLEPairs * rmapRowData; |
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85 RLEPair * item; |
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86 int numChars,startX,endX; |
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87 |
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88 assert(target != NULL); // target must be allocated with new BitMap |
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89 // before being passed to this function. |
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90 assert(source !=NULL); |
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91 |
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92 target->imageWidth() = source->imageWidth(); |
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93 target->imageLength() = source->imageLength(); |
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94 target->status() = source->status(); |
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95 |
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96 target->fMapData = new (uchar *)[target->imageLength()]; |
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97 |
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98 for (int i = 0; i < source->imageLength(); i++) |
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99 { |
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100 |
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101 numChars= source->imageWidth() /8 + 1; // number of char entries |
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102 // Convert RLEPairs to uchar array |
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103 rmapRowData = source->row(i); |
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104 |
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105 target->fMapData[i] = new uchar[numChars]; |
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106 for(int j=0; j < numChars; j++)target->fMapData[i][j] = 0; |
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107 // convert this row from RLE to uchars |
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108 |
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109 ListElement *ptr = rmapRowData->first; |
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110 if (ptr == NULL) cout << "0" << endl; |
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111 for (; ptr != NULL; ptr = ptr->next) |
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112 { |
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113 item = (RLEPair *)(ptr->item); |
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114 startX = item->start; |
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115 endX = item->end; |
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116 setRange(target->fMapData[i], startX, endX); |
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117 } |
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118 cout << endl << endl; |
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119 |
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120 } |
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121 |
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122 |
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123 return VALID; |
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124 |
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125 |
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126 } |
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127 |
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128 |
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129 //MapStatus convertMap(RLEMap * source, RLEMap * target, Point ul, Point lr) |
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130 /*-------------------------------------------------------------- |
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131 Primary Purpose: |
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132 Arguments: |
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133 Return Value: |
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134 Effects: |
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135 Constraints: |
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136 Rev: |
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137 ---------------------------------------------------------------*/ |
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138 //{ |
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139 |
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140 //return EMPTY; |
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141 //} |
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142 |
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143 |
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144 |
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145 void testConvertMap(char * filename) |
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146 // Reads in BitMap and converts to RLEMap then prints on screen |
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147 // Next converts back to BitMap, back to RLEMap and prints |
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148 { |
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149 BitMap * m = new BitMap; |
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150 RLEMap * rm = new RLEMap; |
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151 |
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152 |
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153 m->readMap(filename); |
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154 convertMap(m,rm); |
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155 |
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156 cout << "length chk " << m->imageLength()<< "==" << rm->imageLength()<< endl; |
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157 cout << "width chk " << m->imageWidth()<< "==" << rm->imageWidth() << endl; |
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158 cout << "status chk"<<m->status() << "==" << rm->status() << endl; |
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159 |
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160 printMap(rm); |
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161 |
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162 // Now test conversion the other way |
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163 delete m; |
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164 m = new BitMap; |
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165 convertMap(rm,m); |
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166 delete rm; |
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167 rm = new RLEMap; |
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168 convertMap(m,rm); |
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169 printMap(rm); |
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170 |
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171 |
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172 } |
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