-
<%
-
Class ImgWHInfo ''获取图片宽度和高度的类,支持JPG,GIF,PNG,BMP
-
Dim ASO
-
Private Sub Class_Initialize
-
Set ASO=Server.CreateObject("ADODB.Stream")
-
ASO.Mode=3
-
ASO.Type=1
-
ASO.Open
-
End Sub
-
Private Sub Class_Terminate
-
Err.Clear
-
Set ASO=Nothing
-
End Sub
-
-
Private Function Bin2Str(Bin)
-
Dim I, Str
-
For I=1 To LenB(Bin)
-
clow=MidB(Bin,I,1)
-
If ASCB(clow)<128 Then
-
Str = Str & Chr(ASCB(clow))
-
Else
-
I=I+1
-
If I <= LenB(Bin) Then Str = Str & Chr(ASCW(MidB(Bin,I,1)&clow))
-
End If
-
Next
-
Bin2Str = Str
-
End Function
-
-
Private Function Num2Str(Num,Base,Lens)
-
Dim Ret
-
Ret = ""
-
While(Num>=Base)
-
Ret = (Num Mod Base) & Ret
-
Num = (Num - Num Mod Base)/Base
-
Wend
-
Num2Str = Right(String(Lens,"0") & Num & Ret,Lens)
-
End Function
-
-
Private Function Str2Num(Str,Base)
-
Dim Ret,I
-
Ret = 0
-
For I=1 To Len(Str)
-
Ret = Ret *base + Cint(Mid(Str,I,1))
-
Next
-
Str2Num=Ret
-
End Function
-
-
Private Function BinVal(Bin)
-
Dim Ret,I
-
Ret = 0
-
For I = LenB(Bin) To 1 Step -1
-
Ret = Ret *256 + AscB(MidB(Bin,I,1))
-
Next
-
BinVal=Ret
-
End Function
-
-
Private Function BinVal2(Bin)
-
Dim Ret,I
-
Ret = 0
-
For I = 1 To LenB(Bin)
-
Ret = Ret *256 + AscB(MidB(Bin,I,1))
-
Next
-
BinVal2=Ret
-
End Function
-
-
Private Function GetImageSize(filespec)
-
Dim bFlag
-
Dim Ret(3)
-
ASO.LoadFromFile(filespec)
-
bFlag=ASO.Read(3)
-
Select Case Hex(binVal(bFlag))
-
Case "4E5089":
-
ASO.Read(15)
-
ret(0)="PNG"
-
ret(1)=BinVal2(ASO.Read(2))
-
ASO.Read(2)
-
ret(2)=BinVal2(ASO.Read(2))
-
Case "464947":
-
ASO.read(3)
-
ret(0)="gif"
-
ret(1)=BinVal(ASO.Read(2))
-
ret(2)=BinVal(ASO.Read(2))
-
Case "535746":
-
ASO.read(5)
-
binData=ASO.Read(1)
-
sConv=Num2Str(ascb(binData),2 ,8)
-
nBits=Str2Num(left(sConv,5),2)
-
sConv=mid(sConv,6)
-
While(len(sConv)<nBits*4)
-
binData=ASO.Read(1)
-
sConv=sConv&Num2Str(AscB(binData),2 ,8)
-
Wend
-
ret(0)="SWF"
-
ret(1)=Int(Abs(Str2Num(Mid(sConv,1*nBits+1,nBits),2)-Str2Num(Mid(sConv,0*nBits+1,nBits),2))/20)
-
ret(2)=Int(Abs(Str2Num(Mid(sConv,3*nBits+1,nBits),2)-Str2Num(Mid(sConv,2*nBits+1,nBits),2))/20)
-
Case "FFD8FF":
-
Do
-
Do: p1=binVal(ASO.Read(1)): Loop While p1=255 And Not ASO.EOS
-
If p1>191 And p1<196 Then Exit Do Else ASO.read(binval2(ASO.Read(2))-2)
-
Do:p1=binVal(ASO.Read(1)):Loop While p1<255 And Not ASO.EOS
-
Loop While True
-
ASO.Read(3)
-
ret(0)="JPG"
-
ret(2)=binval2(ASO.Read(2))
-
ret(1)=binval2(ASO.Read(2))
-
Case Else:
-
If left(Bin2Str(bFlag),2)="BM" Then
-
ASO.Read(15)
-
ret(0)="BMP"
-
ret(1)=binval(ASO.Read(4))
-
ret(2)=binval(ASO.Read(4))
-
Else
-
ret(0)=""
-
End If
-
End Select
-
ret(3)="width=""" & ret(1) &""" height=""" & ret(2) &""""
-
getimagesize=ret
-
End Function
-
-
Public Function imgW(IMGPath)
-
Dim FSO,IMGFile,FileExt,Arr
-
Set FSO = Server.CreateObject("Scripting.FileSystemObject")
-
If (FSO.FileExists(IMGPath)) Then
-
Set IMGFile = FSO.GetFile(IMGPath)
-
FileExt=FSO.GetExtensionName(IMGPath)
-
Select Case FileExt
-
Case "gif","bmp","jpg","png":
-
Arr=GetImageSize(IMGFile.Path)
-
imgW = Arr(1)
-
End Select
-
Set IMGFile=Nothing
-
Else
-
imgW = 0
-
End If
-
Set FSO=Nothing
-
End Function
-
-
Public Function imgH(IMGPath)
-
Dim FSO,IMGFile,FileExt,Arr
-
Set FSO = server.CreateObject("Scripting.FileSystemObject")
-
If (FSO.FileExists(IMGPath)) Then
-
Set IMGFile = FSO.GetFile(IMGPath)
-
FileExt=FSO.GetExtensionName(IMGPath)
-
Select Case FileExt
-
Case "gif","bmp","jpg","png":
-
Arr=getImageSize(IMGFile.Path)
-
imgH = Arr(2)
-
End Select
-
Set IMGFile=Nothing
-
Else
-
imgH = 0
-
End If
-
Set FSO=Nothing
-
End Function
-
End Class
-
%>
-
<%
-
IMGPath="Test.jpg"
-
-
Set PP = New ImgWHInfo
-
W = PP.imgW(Server.Mappath(IMGPath))
-
H = PP.imgH(Server.Mappath(IMGPath))
-
Set pp = Nothing
-
%>
-
<%
-
Dim W,PXHeight
-
Dim Pp '
-
If W=0 or W="" Then
-
PXWidth=0
-
PXHeight=0
-
Else
-
Pp=FormatNumber(W/H,2) '
-
End If
-
If W>=H Then
-
If W>=300 Then
-
PXWidth=300
-
PXHeight=FormatNumber(300/Pp,0)
-
Else
-
PXWidth=W
-
PXHeight=H
-
End If
-
Else
-
If PHeight>=260 Then
-
PXHeight=260
-
PXWidth=FormatNumber(260*Pp,0)
-
Else
-
PXWidth=W
-
PXHeight=H
-
End If
-
End If
-
response.Write(PXWidth)
-
%>
-
<img src="Test.jpg" border="0" width=<%=PXWidth%>
-
height=<%=PXHeight%>>