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1 /*
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2 Copyright (C) 2003 WTWG, Uni Bern
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3
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4 This program is free software; you can redistribute it and/or
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5 modify it under the terms of the GNU General Public License
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6 as published by the Free Software Foundation; either version 2
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7 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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17
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18 Author: Christian Luginbuehl, 01.05.2003 , Version Alcatraz 0.3
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19 */
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20 /****************************************************************************
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21 * - imago module for digilib *
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22 * *
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23 * adds brightness and color manipulation to digilib *
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24 * *
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25 * christian luginbuehl (luginbuehl@student.unibe.ch) *
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26 ****************************************************************************/
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27
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28 // overriding (some kind of inheriting) init in navigation_XX.js
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29 function init_imago(pu, pn, ws, mo, mk, wx, wy, ww, wh, pt, brgt, cont, rot, rgba, rgbm) {
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30
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31 // debug window to check the parameters passed
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32 //alert ("DEBUG message (parameters in init imago.js):\n\npu = " + pu + "\npn = " + pn + "\nws = " + ws + "\nmo = " + mo + "\nmk = " + mk + "\nwx = " + wx + "\nwy = " + wy + "\nww = " + ww + "\nwh = " + wh + "\npt = " + pt + "\nbrgt = " + brgt + "\ncont = " + cont + "\nrot = " + rot + "\nrgba = " + rgba + "\nrgbm = " + rgbm);
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33
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34 // calling original init
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35 init_pagesTotal(pu, pn, ws, mo, mk, wx, wy, ww, wh, pt);
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36
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37 att.brgt = parseInt(brgt);
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38 att.cont = parseFloat(cont);
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39 att.rot = parseFloat(rot);
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40 att.rgba = rgba;
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41 att.rgbm = rgbm;
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42
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43 focus();
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44 }
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45
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46
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47 /**
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48 * overriding 'loadPicture' in navigation
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49 */
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50 function loadPicture(detailGrade, keepArea) {
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51
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52 // the different detailGrades:
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53 // 0 -> back, next, page
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54 // 1 -> zoomout
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55 // 2 -> zoomarea, zoompoint, moveto, scaledef
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56
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57 var newQuery = "fn=" + att.fn + "&pn=" + att.pn + "&ws=" + att.ws + "&mo=" + att.mo;
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58
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59 if (detailGrade == 0) {
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60 att.mk = "0/0";
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61 att.brgt = 0;
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62 att.cont = 0;
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63 }
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64
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65 if ((detailGrade == 1) || (detailGrade == 0 && !keepArea)) {
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66 att.wx = 0;
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67 att.wy = 0;
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68 att.ww = 1;
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69 att.wh = 1;
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70 }
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71
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72 newQuery += "&mk=" + att.mk + "&wx=" + att.wx + "&wy=" + att.wy + "&ww=" + att.ww + "&wh=" + att.wh;
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73
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74 if (navigator.appName.toLowerCase() == "netscape") { // mozilla-browsers (netscape 4.xx, netscape 6.xx, etc.)
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75 newQuery += "&dw=" + (innerWidth-30) + "&dh=" + (innerHeight-30);
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76 } else { // ie, opera
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77 newQuery += "&dw=" + (document.body.clientWidth-30) + "&dh=" + (document.body.clientHeight-30);
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78 }
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79
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80 newQuery += "&pt=" + att.pt;
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81
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82 newQuery += "&brgt=" + att.brgt;
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83 newQuery += "&cont=" + att.cont;
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84 newQuery += "&rot=" + att.rot;
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85 newQuery += "&rgba=" + att.rgba;
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86 newQuery += "&rgbm=" + att.rgbm;
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87
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88 newQuery += "&lv=1";
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89
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90 // debug window - checking the parameters passed to the next image
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91 //alert ("DEBUG MESSAGE (query-string in loadPicture):\n\n" + newQuery);
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92 //alert(location.host + ":" + location.port + location.pathname);
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93 location.href = location.protocol + "//" + location.host + location.pathname + "?" + newQuery;
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94 }
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95
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96
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97 /**
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98 * brightness (value of brightness between -255 - +255)
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99 */
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100 function brightness(value) {
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101
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102 if ((value < -255) || (value > 255)) {
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103
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104 alert ("Illegal brightness value (-255 to +255)");
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105
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106 } else {
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107
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108 att.brgt = value;
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109
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110 loadPicture(2);
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111 }
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112
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113 }
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114
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115 /**
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116 * contrast (value of contrast - range?)
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117 */
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118 function contrast(value) {
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119
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120 att.cont = parseFloat(value);
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121
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122 loadPicture(2);
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123
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124 }
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125
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126 /**
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127 * rotation (value from 0 to 360 degrees)
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128 */
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129 function rotation(value) {
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130
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131 value = parseFloat(value) % 360;
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132
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133 if (value < 0) {
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134 value += 360;
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135 }
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136
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137 att.rot = value;
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138
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139 loadPicture(2);
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140
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141 }
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142
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143 /**
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144 * rgb add (r/g/b, each value from -255 to +255)
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145 */
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146 function rgba(value) {
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147
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148 values = value.split("/");
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149
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150 if (values.length != 3) {
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151 alert ("Illegal parameter format (r/g/b)");
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152 } else if ((values[0] < -255) || (values[0] > 255)) {
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153 alert ("Illegal red additioner (-255 to 255)");
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154 } else if ((values[1] < -255) || (values[1] > 255)) {
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155 alert ("Illegal green additioner (-255 to 255)");
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156 } else if ((values[2] < -255) || (values[2] > 255)) {
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157 alert ("Illegal blue additioner (-255 to 255)");
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158 } else {
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159
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160 att.rgba = value;
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161 loadPicture(2);
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162
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163 }
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164 }
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165
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166 /**
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167 * rgb multiply (r/g/b, each value from ??? )
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168 */
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169 function rgbm(value) {
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170
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171 values = value.split("/");
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172
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173 if (values.length != 3) {
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174 alert ("Illegal parameter format (r/g/b)");
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175 } else {
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176
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177 att.rgbm = value;
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178 loadPicture(2);
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179
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180 }
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181 }
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