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How do I know the actual size of an image on a page

Source: Internet
Author: User
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The following two files:
<!--#include virtual= "/intels/chunfeng/graphicdetect.asp"-->
<TITLE> Image Dimensions </TITLE>
<body bgcolor= "#FFFFFF" >
<%
Graphic= "Images/intels.gif"
HW = readimg (graphic)
Response.Write Graphic & "Dimensions:" & HW (0) & "x" & HW (1)
& "<br>"
Response.Write "Response.Write height= "" "& HW (0) &" ""
Response.Write width= "" "& HW (0) &" > "
%>
</body>

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Graphicdetect.asp
<%
Dim HW

Function Ascat (s, N)
Ascat = ASC (Mid (S, N, 1))
End Function

Function Hexat (s, N)
Hexat = Hex (Ascat (S, N))
End Function

Function isjpg (Fichero)
If inStr (UCase (Fichero), ". JPG ") <> 0 Then
Isjpg = True
Else
Isjpg = False
End If
End Function

Function Ispng (Fichero)
If inStr (UCase (Fichero), ". PNG ") <> 0 Then
Ispng = True
Else
Ispng = False
End If
End Function

Function Isgif (Fichero)
If inStr (UCase (Fichero), ". GIF ") <> 0 Then
Isgif = True
Else
Isgif = False
End If
End Function

Function isbmp (Fichero)
If inStr (UCase (Fichero), ". BMP ") <> 0 Then
Isbmp = True
Else
Isbmp = False
End If
End Function

Function iswmf (Fichero)
If inStr (UCase (Fichero), ". WMF ") <> 0 Then
Iswmf = True
Else
Iswmf = False
End If
End Function

Function iswebimg (f)
If isgif (f) or isjpg (f) or ispng (f) or isbmp (f) or iswmf (f)
Then
Iswebimg = True
Else
Iswebimg = True
End If
End Function

Function readimg (Fichero)
If isgif (Fichero) Then
readimg = Readgif (Fichero)
Else
If isjpg (Fichero) Then
readimg = readjpg (Fichero)
Else
If ispng (Fichero) Then
readimg = Readpng (Fichero)
Else
If isbmp (Fichero) Then
readimg = Readpng (Fichero)
Else
If iswmf (Fichero) Then
readimg = readwmf (Fichero)
Else
readimg = Array (0,0)
End If
End If
End If
End If
End If
End Function

Function readjpg (Fichero)
Dim FSO, TS, S, HW, nbytes
HW = Array ("", "")
Set fso = CreateObject ("Scripting.FileSystemObject")
Set ts = fso. OpenTextFile (Server.MapPath ("/" & Fichero), 1)
s = Right (ts. Read (167), 4)
HW (0) = Hextodec (Hexat (s,3) & Hexat (s,4))
HW (1) = Hextodec (Hexat (s,1) & Hexat (s,2))
Ts. Close
Readjpg = HW
End Function

Function Readpng (Fichero)
Dim FSO, TS, S, HW, nbytes
HW = Array ("", "")
Set fso = CreateObject ("Scripting.FileSystemObject")
Set ts = fso. OpenTextFile (Server.MapPath ("/" & Fichero), 1)
s = Right (ts. Read (24), 8)
HW (0) = Hextodec (Hexat (s,3) & Hexat (s,4))
HW (1) = Hextodec (Hexat (s,7) & Hexat (s,8))
Ts. Close
Readpng = HW
End Function

Function Readgif (Fichero)
Dim FSO, TS, S, HW, nbytes
HW = Array ("", "")
Set fso = CreateObject ("Scripting.FileSystemObject")
Set ts = fso. OpenTextFile (Server.MapPath ("/" & Fichero), 1)
s = Right (ts. Read (10), 4)
HW (0) = Hextodec (Hexat (s,2) & Hexat (s,1))
HW (1) = Hextodec (Hexat (s,4) & Hexat (s,3))
Ts. Close
Readgif = HW
End Function

Function readwmf (Fichero)
Dim FSO, TS, S, HW, nbytes
HW = Array ("", "")
Set fso = CreateObject ("Scripting.FileSystemObject")
Set ts = fso. OpenTextFile (Server.MapPath ("/" & Fichero), 1)
s = Right (ts. Read (14), 4)
HW (0) = Hextodec (Hexat (s,2) & Hexat (s,1))
HW (1) = Hextodec (Hexat (s,4) & Hexat (s,3))
Ts. Close
READWMF = HW
End Function

Function readbmp (Fichero)
Dim FSO, TS, S, HW, nbytes
HW = Array ("", "")
Set fso = CreateObject ("Scripting.FileSystemObject")
Set ts = fso. OpenTextFile (Server.MapPath ("/" & Fichero), 1)
s = Right (ts. Read (24), 8)
HW (0) = Hextodec (Hexat (s,4) & Hexat (s,3))
HW (1) = Hextodec (Hexat (s,8) & Hexat (s,7))
Ts. Close
Readbmp = HW
End Function

Function IsDigit (c)
If inStr ("0123456789", c) <> 0 Then
IsDigit = True
Else
IsDigit = False
End If
End Function

Function Ishex (c)
If inStr ("0123456789ABCDEFabcdef", c) <> 0 Then
Ishex = True
Else
Ishex = False
End If
End Function

Function Hextodec (Cadhex)
Dim n, I, CH, decimal
decimal = 0
n = Len (Cadhex)
For I=1 to N
ch = Mid (Cadhex, I, 1)
If ishex (CH) Then
decimal = decimal * 16
If IsDigit (c) Then
decimal = decimal + ch
Else
decimal = decimal + ASC (uCase (CH))-ASC ("A")
End If
Else
Hextodec =-1
End If
Next
Hextodec = Decimal
End Function
%>




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Related Keywords:
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