asp输出bmp

　　asp输出bmp
[2005-03-0612:04:25作者:flashsoft]
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<%
CallCom_CreatValidCode(ValidCode)

SubCom_CreatValidCode(pSN)

Author:Layen
QQ:84815733

禁止缓存
Response.Expires=-9999
Response.AddHeaderPragma,no-cache
Response.AddHeadercache-ctrol,no-cache

Randomize

Dimi,ii,iii

ConstcOdds=8杂点出现的机率
ConstcAmount=36文字数量
ConstcCode=0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ

颜色的数据(字符，背景)
DimvColorData(1)
vColorData(0)=ChrB(0)&ChrB(0)&ChrB(0)蓝0，绿0，红0（黑色）
vColorData(1)=ChrB(250)&ChrB(236)&ChrB(211)蓝250，绿236，红211（浅蓝色）

随机产生字符
DimvCode(4),vCodes
Fori=0To3
vCode(i)=Int(Rnd*cAmount)
vCodes=vCodes&Mid(cCode,vCode(i)+1,1)
Next

Session(pSN)=vCodes记录入Session

字符的数据
DimvNumberData(35)
vNumberData(0)=1110000111110111101111011110111101001011110100101111010010111101001011110111101111011110111110000111
vNumberData(1)=1111011111110001111111110111111111011111111101111111110111111111011111111101111111110111111100000111
vNumberData(2)=1110000111110111101111011110111111111011111111011111111011111111011111111011111111011110111100000011
vNumberData(3)=1110000111110111101111011110111111110111111100111111111101111111111011110111101111011110111110000111
vNumberData(4)=1111101111111110111111110011111110101111110110111111011011111100000011111110111111111011111111000011
vNumberData(5)=1100000011110111111111011111111101000111110011101111111110111111111011110111101111011110111110000111
vNumberData(6)=1111000111111011101111011111111101111111110100011111001110111101111011110111101111011110111110000111
vNumberData(7)=1100000011110111011111011101111111101111111110111111110111111111011111111101111111110111111111011111
vNumberData(8)=1110000111110111101111011110111101111011111000011111101101111101111011110111101111011110111110000111
vNumberData(9)=1110001111110111011111011110111101111011110111001111100010111111111011111111101111011101111110001111
vNumberData(10)=1111011111111101111111101011111110101111111010111111101011111100000111110111011111011101111000100011
vNumberData(11)=1000000111110111101111011110111101110111110000111111011101111101111011110111101111011110111000000111
vNumberData(12)=1110000011110111101110111110111011111111101111111110111111111011111111101111101111011101111110001111
vNumberData(13)=1000001111110111011111011110111101111011110111101111011110111101111011110111101111011101111000001111
vNumberData(14)=1000000111110111101111011011111101101111110000111111011011111101101111110111111111011110111000000111
vNumberData(15)=1000000111110111101111011011111101101111110000111111011011111101101111110111111111011111111000111111
vNumberData(16)=1110000111110111011110111101111011111111101111111110111111111011100011101111011111011101111110001111
vNumberData(17)=1000100011110111011111011101111101110111110000011111011101111101110111110111011111011101111000100011
vNumberData(18)=1100000111111101111111110111111111011111111101111111110111111111011111111101111111110111111100000111
vNumberData(19)=1110000011111110111111111011111111101111111110111111111011111111101111111110111110111011111000011111
vNumberData(20)=1000100011110111011111011011111101011111110001111111010111111101101111110110111111011101111000100011
vNumberData(21)=1000111111110111111111011111111101111111110111111111011111111101111111110111111111011110111000000011
vNumberData(22)=1000100011110010011111001001111100100111110101011111010101111101010111110101011111010101111001010011
vNumberData(23)=1000100011110011011111001101111101010111110101011111010101111101100111110110011111011001111000110111
vNumberData(24)=1110001111110111011110111110111011111011101111101110111110111011111011101111101111011101111110001111
vNumberData(25)=1000000111110111101111011110111101111011110000011111011111111101111111110111111111011111111000111111
vNumberData(26)=1110001111110111011110111110111011111011101111101110111110111011111011101001101111011001111110001011
vNumberData(27)=1000001111110111011111011101111101110111110000111111010111111101101111110110111111011101111000110011
vNumberData(28)=1110000011110111101111011110111101111111111001111111111001111111111011110111101111011110111100000111
vNumberData(29)=1000000011101101101111110111111111011111111101111111110111111111011111111101111111110111111110001111
vNumberData(30)=1000100011110111011111011101111101110111110111011111011101111101110111110111011111011101111110001111
vNumberData(31)=1000100011110111011111011101111101110111111010111111101011111110101111111010111111110111111111011111
vNumberData(32)=1001010011110101011111010101111101010111110101011111001001111110101111111010111111101011111110101111
vNumberData(33)=1000100011110111011111101011111110101111111101111111110111111110101111111010111111011101111000100011
vNumberData(34)=1000100011110111011111011101111110101111111010111111110111111111011111111101111111110111111110001111
vNumberData(35)=1100000011110111011111111101111111101111111110111111110111111111011111111011111111101110111100000011

输出图像文件头
Response.BinaryWriteChrB(66)&ChrB(77)&ChrB(230)&ChrB(4)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&_
ChrB(0)&ChrB(0)&ChrB(54)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(40)&ChrB(0)&_
ChrB(0)&ChrB(0)&ChrB(40)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(10)&ChrB(0)&_
ChrB(0)&ChrB(0)&ChrB(1)&ChrB(0)

输出图像信息头
Response.BinaryWriteChrB(24)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(176)&ChrB(4)&_
ChrB(0)&ChrB(0)&ChrB(18)&ChrB(11)&ChrB(0)&ChrB(0)&ChrB(18)&ChrB(11)&_
ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&ChrB(0)&_
ChrB(0)&ChrB(0)

Fori=9To0Step-1历经所有行
Forii=0To3历经所有字
Foriii=1To10历经所有像素
逐行、逐字、逐像素地输出图像数据
IfRnd*99+1<cOddsThen随机生成杂点
Response.BinaryWritevColorData(0)
Else
Response.BinaryWritevColorData(Mid(vNumberData(vCode(ii)),i*10+iii,1))
EndIf
Next
Next
Next

EndSub
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