7 img = Image.FromFile(Server.MapPath("test.png"))
8 Dim h0 = CInt(Request("h0"))
9 Dim w0 = CInt(Request("w0"))
10
11 Dim faktorW = img.Width / w0
12 Dim faktorH = img.Height / h0
13
14
15
16
17 Dim X1 As Integer = CInt(Request("x1")) * faktorW
18 Dim Y1 As Integer = CInt(Request("y1")) * faktorH
19 Dim X2 As Integer = CInt(Request("x2")) * faktorW
20 Dim Y2 As Integer = CInt(Request("y2")) * faktorH
21
22 Dim targetWidth = 150
23 Dim targetHeight = 200
24
25
26
27 Response.ContentType = "image/jpg"
28 Response.StatusCode = 200
29 Dim img1 = cropAndResizeImage(img, _
30 targetWidth, _
31 targetHeight, _
32 X1, _
33 Y1, _
34 X2, _
35 Y2, _
36 Imaging.ImageFormat.Jpeg)
37 Response.BinaryWrite(img1.ToArray)
38
39 Response.End()
Auch der Javascript Code ist überschaubar:
7 var(api = null)
8 $(window).load(function() { initCrop() });
9 function initCrop() {
10
11 api = $.Jcrop('#rootImage', {
12 aspectRatio: .75,
13 minSize: [25, 0],
14 onChange: createPreview,
15 onSelect: createPreview()
16 });
17
26 }
27
28 function createPreview(c) {
29 previewUrl = 'zImages.aspx?t=1'
30 + '&w0=' + $('#rootImage').width()
31 + '&h0=' + $('#rootImage').height()
32 + '&x1=' + c.x + '&y1=' + c.y + '&x2=' + c.x2
33 + '&y2=' + c.y2 + '&w=' + c.w + '&h=' + c.h
34 }
35
36 var previewUrl = 'trans.gif'
37 var previewUrlLast = ''
38 var aktiv = window.setTimeout("updatePreview()", 50);
39
40 function updatePreview() {
41 if (previewUrl != previewUrlLast) {
42 previewUrlLast = previewUrl
43 $('#previewImage').attr('src', previewUrl);
44 }
45 //Timer nicht zu kurz setzen!!
46 aktiv = window.setTimeout("updatePreview()", 150);
47 }
I love jQuery ;-)
