Mercurial > hg > digilib

comparison client/digitallibrary/modules/imago.js @ 102:26e6b2715a15

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Initial revision
author engler
date Tue, 13 May 2003 21:02:16 +0200
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children 7dc74e541d7c
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100:4986e0e80625 102:26e6b2715a15
1 /*
2 Copyright (C) 2003 WTWG, Uni Bern
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
17
18 Author: Christian Luginbuehl, 01.05.2003 , Version Alcatraz 0.3
19 */
20 /****************************************************************************
21 * - imago module for digilib *
22 * *
23 * adds brightness and color manipulation to digilib *
24 * *
25 * christian luginbuehl (luginbuehl@student.unibe.ch) *
26 ****************************************************************************/
27
28 // overriding (some kind of inheriting) init in navigation_XX.js
29 function init_imago(pu, pn, ws, mo, mk, wx, wy, ww, wh, pt, brgt, cont, rot, rgba, rgbm) {
30
31 // debug window to check the parameters passed
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);
33
34 // calling original init
35 init_pagesTotal(pu, pn, ws, mo, mk, wx, wy, ww, wh, pt);
36
37 att.brgt = parseInt(brgt);
38 att.cont = parseFloat(cont);
39 att.rot = parseFloat(rot);
40 att.rgba = rgba;
41 att.rgbm = rgbm;
42
43 focus();
44 }
45
46
47 /**
48 * overriding 'loadPicture' in navigation
49 */
50 function loadPicture(detailGrade, keepArea) {
51
52 // the different detailGrades:
53 // 0 -> back, next, page
54 // 1 -> zoomout
55 // 2 -> zoomarea, zoompoint, moveto, scaledef
56
57 var newQuery = "fn=" + att.fn + "&pn=" + att.pn + "&ws=" + att.ws + "&mo=" + att.mo;
58
59 if (detailGrade == 0) {
60 att.mk = "0/0";
61 att.brgt = 0;
62 att.cont = 0;
63 }
64
65 if ((detailGrade == 1) || (detailGrade == 0 && !keepArea)) {
66 att.wx = 0;
67 att.wy = 0;
68 att.ww = 1;
69 att.wh = 1;
70 }
71
72 newQuery += "&mk=" + att.mk + "&wx=" + att.wx + "&wy=" + att.wy + "&ww=" + att.ww + "&wh=" + att.wh;
73
74 if (navigator.appName.toLowerCase() == "netscape") { // mozilla-browsers (netscape 4.xx, netscape 6.xx, etc.)
75 newQuery += "&dw=" + (innerWidth-30) + "&dh=" + (innerHeight-30);
76 } else { // ie, opera
77 newQuery += "&dw=" + (document.body.clientWidth-30) + "&dh=" + (document.body.clientHeight-30);
78 }
79
80 newQuery += "&pt=" + att.pt;
81
82 newQuery += "&brgt=" + att.brgt;
83 newQuery += "&cont=" + att.cont;
84 newQuery += "&rot=" + att.rot;
85 newQuery += "&rgba=" + att.rgba;
86 newQuery += "&rgbm=" + att.rgbm;
87
88 newQuery += "&lv=1";
89
90 // debug window - checking the parameters passed to the next image
91 //alert ("DEBUG MESSAGE (query-string in loadPicture):\n\n" + newQuery);
92 //alert(location.host + ":" + location.port + location.pathname);
93 location.href = location.protocol + "//" + location.host + location.pathname + "?" + newQuery;
94 }
95
96
97 /**
98 * brightness (value of brightness between -255 - +255)
99 */
100 function brightness(value) {
101
102 if ((value < -255) || (value > 255)) {
103
104 alert ("Illegal brightness value (-255 to +255)");
105
106 } else {
107
108 att.brgt = value;
109
110 loadPicture(2);
111 }
112
113 }
114
115 /**
116 * contrast (value of contrast - range?)
117 */
118 function contrast(value) {
119
120 att.cont = parseFloat(value);
121
122 loadPicture(2);
123
124 }
125
126 /**
127 * rotation (value from 0 to 360 degrees)
128 */
129 function rotation(value) {
130
131 value = parseFloat(value) % 360;
132
133 if (value < 0) {
134 value += 360;
135 }
136
137 att.rot = value;
138
139 loadPicture(2);
140
141 }
142
143 /**
144 * rgb add (r/g/b, each value from -255 to +255)
145 */
146 function rgba(value) {
147
148 values = value.split("/");
149
150 if (values.length != 3) {
151 alert ("Illegal parameter format (r/g/b)");
152 } else if ((values[0] < -255) || (values[0] > 255)) {
153 alert ("Illegal red additioner (-255 to 255)");
154 } else if ((values[1] < -255) || (values[1] > 255)) {
155 alert ("Illegal green additioner (-255 to 255)");
156 } else if ((values[2] < -255) || (values[2] > 255)) {
157 alert ("Illegal blue additioner (-255 to 255)");
158 } else {
159
160 att.rgba = value;
161 loadPicture(2);
162
163 }
164 }
165
166 /**
167 * rgb multiply (r/g/b, each value from ??? )
168 */
169 function rgbm(value) {
170
171 values = value.split("/");
172
173 if (values.length != 3) {
174 alert ("Illegal parameter format (r/g/b)");
175 } else {
176
177 att.rgbm = value;
178 loadPicture(2);
179
180 }
181 }