1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
function renderDataSet(dataSet, parent) {
var tags = dataSet.get_tags();
for(var tagIndex=0; tagIndex<tags.size(); ++tagIndex) {
// Create child element
var listItem = document.createElement('li');
parent.appendChild(listItem);
// Get tag name if known, default to string representation
var tag = tags.get(tagIndex);
var tagString = tag.toString();
var tagName = tagString;
try {
tagName = tag.get_name();
}
catch(e) {
// Ignore the error
}
listItem.textContent +=
tagName +
' (' + tagString.slice(0,4) + ',' + tagString.slice(4,8) + ') ';
listItem.textContent += odil.VRtoString(dataSet.get_vr(tag)) + ': ';
if(dataSet.empty_tag(tag)) {
listItem.textContent += '(empty)';
}
else if(dataSet.is_int(tag)) {
var array = new Array();
var element = dataSet.as_int(tag);
for(var i=0; i<element.size(); ++i) {
array.push(element.get(i));
}
listItem.textContent += JSON.stringify(array);
}
else if(dataSet.is_real(tag)) {
var array = new Array();
var element = dataSet.as_real(tag);
for(var i=0; i<element.size(); ++i) {
array.push(element.get(i));
}
listItem.textContent += JSON.stringify(array);
}
else if(dataSet.is_string(tag)) {
var array = new Array();
var element = dataSet.as_string(tag);
for(var i=0; i<element.size(); ++i) {
array.push(element.get(i));
}
listItem.textContent += JSON.stringify(array);
}
else if(dataSet.is_data_set(tag)) {
listItem.textContent += dataSet.size_tag(tag) + ' item';
if(dataSet.size_tag(tag) > 1) {
listItem.textContent += 's';
}
var ol = document.createElement('ol');
listItem.appendChild(ol);
var element = dataSet.as_data_set(tag);
for(var i=0; i<element.size(); ++i) {
var olItem = document.createElement('li');
ol.appendChild(olItem);
var ul = document.createElement('ul');
olItem.appendChild(ul);
renderDataSet(element.get(i), ul);
}
}
else if(dataSet.is_binary(tag)) {
var array = new Array();
var element = dataSet.as_binary(tag);
for(var i=0; i<element.size(); ++i) {
var binary = element.get(i);
array.push(
'(binary, ' + binary.size() + ' byte'
+ (binary.size()>1?'s':'') + ')');
}
listItem.textContent += JSON.stringify(array);
}
else {
listItem.textContent += '(unknown type)';
}
}
}
function putDataSetImage(dataSet, context) {
var bytes = dataSet.as_bytes(odil.getTag('PixelData'));
var arrayBuffer = new ArrayBuffer(bytes.length);
var view = new DataView(arrayBuffer);
for(var i=0; i < bytes.length; ++i) {
view.setUint8(i, bytes[i]);
}
var bitsAllocated = dataSet.as_int(odil.getTag('BitsAllocated')).get(0);
var isSigned = false;
if(dataSet.has(odil.getTag('PixelRepresentation'))) {
isSigned = (
dataSet.as_int(odil.getTag('PixelRepresentation')).get(0) === 1);
}
var getter = 'get'+(isSigned?'Int':'Uint')+bitsAllocated;
getter = DataView.prototype[getter].bind(view);
var bytesAllocated = bitsAllocated/8;
var rows = dataSet.as_int(odil.getTag('Rows')).get(0);
var columns = dataSet.as_int(odil.getTag('Columns')).get(0);
var imageData = context.getImageData(0, 0, columns, rows);
var smallest = getter(0, true);
var largest = getter(0, true);
for(var i=0; i<bytes.length; i += bytesAllocated) {
var value = getter(i, true);
smallest = Math.min(smallest, value);
largest = Math.max(largest, value);
}
var factor = 255./(largest-smallest);
var photometricInterpretation =
dataSet.as_string(odil.getTag('PhotometricInterpretation')).get(0);
var putPixel = null;
if(photometricInterpretation === 'MONOCHROME2') {
putPixel = putPixel_MONOCHROME2;
}
else if(photometricInterpretation === 'RGB') {
putPixel = putPixel_RGB;
}
for(var i=0; i<rows*columns; ++i) {
putPixel(getter, i, bytesAllocated, smallest, factor, imageData);
}
context.putImageData(imageData, 0, 0);
}
function putPixel_MONOCHROME2(getter, index, bytesAllocated, smallest, factor, imageData) {
var value = (getter(bytesAllocated*index, true)-smallest)*factor;
imageData.data[4*index] = value;
imageData.data[4*index+1] = value;
imageData.data[4*index+2] = value;
imageData.data[4*index+3] = 255;
}
function putPixel_RGB(getter, index, bytesAllocated, smallest, factor, imageData) {
var red = (getter(3*bytesAllocated*index, true)-smallest)*factor;
var green = (getter(3*bytesAllocated*index+1, true)-smallest)*factor;
var blue = (getter(3*bytesAllocated*index+2, true)-smallest)*factor;
imageData.data[4*index] = red;
imageData.data[4*index+1] = green;
imageData.data[4*index+2] = blue;
imageData.data[4*index+3] = 255;
}
|
