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分享关于验证码
为了安全 ，现在的很多网站都采取了验证码，最原始的纯数字或字符的验证码毫无用处。网站使用的验证码 一般都是 图片+干扰像素的。
有那位大大知道是怎么做到的么？我不想用组件，最好是纯代码的。
有那位大大知道是怎么做到的么？我不想用组件，最好是纯代码的。
...全文
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DanSir 2012-04-16
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学习中，谢谢各位大虾！！
lan_alan 2010-11-17
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我给你来一个简单一点的：
<%'生成验证码图片文件
Option Explicit
Response.buffer=true
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
Response.Expires = -1
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
Response.ContentType = "Image/BMP"
Randomize
Dim i, ii, iii
Const cOdds = 0 ' 杂点出现的机率
Const cAmount = 10 ' 文字数量
Const cCode = "0123456789"
' 颜色的数据(字符，背景)
Dim vColorData(1)
vColorData(0) = ChrB(155) & ChrB(58) & ChrB(48) ' 蓝0，绿0，红0（黑色）
vColorData(1) = ChrB(255) & ChrB(223) & ChrB(223) ' 蓝250，绿236，红211（浅蓝色）
' 随机产生字符
Dim vCode(4), vCodes
For i = 0 To 3
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
Dim vNumberData(9)
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"
' 输出图像文件头
Response.BinaryWrite ChrB(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.BinaryWrite ChrB(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)
For i = 9 To 0 Step -1 ' 历经所有行
For ii = 0 To 3 ' 历经所有字
For iii = 1 To 10 ' 历经所有像素
' 逐行、逐字、逐像素地输出图像数据
If Rnd * 99 + 1 < cOdds Then ' 随机生成杂点
Response.BinaryWrite vColorData(0)
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
End If
Next
Next
Next
End Sub
%>
调用：
<img src="1.asp">
判断：
只要判断表单变量和SESSION表量是否一致就可以了
<%'生成验证码图片文件
Option Explicit
Response.buffer=true
Call Com_CreatValidCode("GetCode")
Sub Com_CreatValidCode(pSN)
Response.Expires = -1
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
Response.ContentType = "Image/BMP"
Randomize
Dim i, ii, iii
Const cOdds = 0 ' 杂点出现的机率
Const cAmount = 10 ' 文字数量
Const cCode = "0123456789"
' 颜色的数据(字符，背景)
Dim vColorData(1)
vColorData(0) = ChrB(155) & ChrB(58) & ChrB(48) ' 蓝0，绿0，红0（黑色）
vColorData(1) = ChrB(255) & ChrB(223) & ChrB(223) ' 蓝250，绿236，红211（浅蓝色）
' 随机产生字符
Dim vCode(4), vCodes
For i = 0 To 3
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
Dim vNumberData(9)
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"
' 输出图像文件头
Response.BinaryWrite ChrB(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.BinaryWrite ChrB(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)
For i = 9 To 0 Step -1 ' 历经所有行
For ii = 0 To 3 ' 历经所有字
For iii = 1 To 10 ' 历经所有像素
' 逐行、逐字、逐像素地输出图像数据
If Rnd * 99 + 1 < cOdds Then ' 随机生成杂点
Response.BinaryWrite vColorData(0)
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
End If
Next
Next
Next
End Sub
%>
调用：
<img src="1.asp">
判断：
只要判断表单变量和SESSION表量是否一致就可以了
qweasdrr 2010-11-17
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受教了
iphone8 2010-11-14
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继续接着上面的代码
Private Sub Class_Terminate()
Font.RemoveAll
Set Font = Nothing
End Sub
Public Property Get Width()
Width = Width_
End Property
Public Property Get Height()
Height = Height_
End Property
Public Property Get Version()
Version = "NetRube VerifyCode Class 1.0 Build 20041225"
End Property
Public Property Let BGroundColor(ByVal Color)
GlobalColorTable(0) = MakeColor(Color)
BGroundColorIndex = 0
End Property
Public Property Let FGroundColor(ByVal Color)
GlobalColorTable(1) = MakeColor(Color)
FGroundColorIndex = 1
End Property
Public Property Get Pixel(ByVal PX, ByVal PY)
If (PX > 0 And PX <= Width_) And (PY > 0 And PY <= Height_) Then
Pixel = AscB(MidB(Image, (Width_ * (PY - 1)) + PX, 1))
Else
Pixel = 0
End If
End Property
Public Property Let Pixel(ByVal PX, ByVal PY, PValue)
Dim Offset
PX = Int(PX)
PY = Int(PY)
PValue = Int(PValue)
Offset = Width_ * (PY - 1)
If (PX > 0 And PX <= Width_) And (PY > 0 And PY <= Height_) Then
Image = LeftB(Image, Offset + (PX - 1)) & ChrB(PValue) & RightB(Image, LenB(Image) - (Offset + PX))
End If
End Property
Public Sub Clear()
Image = String(Width_ * (Height_ + 1) / 2, ChrB(BGroundColorIndex) & ChrB(BGroundColorIndex))
End Sub
Public Sub Resize(ByVal NewWidth, ByVal NewHeight, RPreserve)
Dim OldImage, OldWidth, OldHeight
Dim CopyWidth, CopyHeight
Dim X, Y
If RPreserve Then
OldImage = Image
OldWidth = Width_
OldHeight = Height_
End If
Width_ = NewWidth
Height_ = NewHeight
Clear
If RPreserve Then
If NewWidth > OldWidth Then CopyWidth = OldWidth Else CopyWidth = NewWidth
If NewHeight > OldHeight Then CopyHeight = OldHeight Else CopyHeight = NewHeight
Width_ = NewWidth
Height_ = NewHeight
For Y = 1 To CopyHeight
For X = 1 To CopyWidth
Pixel(X, Y) = AscB(MidB(OldImage, (OldWidth * (Y - 1)) + X, 1))
Next
Next
End If
End Sub
Private Function ShiftLeft(SLValue, SLBits)
ShiftLeft = SLValue * (2 ^ SLBits)
End Function
Private Function ShiftRight(SRValue, SRBits)
ShiftRight = Int(SRValue / (2 ^ SRBits))
End Function
Private Function Low(LValue)
Low = LValue And &HFF
End Function
Private Function High(HValue)
High = ShiftRight(HValue, 8)
End Function
Private Function Blue(BValue)
Blue = Low(ShiftRight(BValue, 16))
End Function
Private Function Green(GValue)
Green = Low(ShiftRight(GValue, 8))
End Function
Private Function Red(RValue)
Red = Low(RValue)
End Function
Private Function MakeColor(MCValue)
MakeColor = CLng("&H" & Right(MCValue, 2) & Mid(MCValue, 4, 2) & Mid(MCValue, 2, 2))
End Function
Private Function GetWord(GWValue)
GetWord = ShiftLeft(AscB(RightB(GWValue, 1)), 8) Or AscB(LeftB(GWValue, 1))
End Function
Private Function MakeWord(MWValue)
MakeWord = ChrB(Low(MWValue)) & ChrB(High(MWValue))
End Function
Private Function MakeByte(MBValue)
MakeByte = ChrB(Low(MBValue))
End Function
Private Function UncompressedData()
Dim ClearCode, ChunkMax, EndOfStream
Dim UDData, UD, U
UncompressedData = ""
ClearCode = 2 ^ Bits
ChunkMax = 2 ^ Bits - 2
EndOfStream = ClearCode + 1
UDData = ""
For U = 1 To LenB(Image) Step ChunkMax
UDData = UDData & MidB(Image, U, ChunkMax) & ChrB(ClearCode)
Next
For U = 1 To LenB(UDData) Step &HFF
UD = MidB(UDData, U, &HFF)
UncompressedData = UncompressedData & MakeByte(LenB(UD)) & UD
Next
UncompressedData = UncompressedData & MakeByte(&H00)
UncompressedData = UncompressedData & MakeByte(EndOfStream)
End Function
Private Function GetGColorTable()
Dim GGCT
GetGColorTable = ""
For GGCT = 0 To UBound(GlobalColorTable) - 1
GetGColorTable = GetGColorTable & MakeByte(Red(GlobalColorTable(GGCT)))
GetGColorTable = GetGColorTable & MakeByte(Green(GlobalColorTable(GGCT)))
GetGColorTable = GetGColorTable & MakeByte(Blue(GlobalColorTable(GGCT)))
Next
End Function
Private Function GetLColorTable()
Dim GLCT
GetLColorTable = ""
For GLCT = 0 To UBound(LocalColorTable) - 1
GetLColorTable = GetLColorTable & MakeByte(Red(LocalColorTable(GLCT)))
GetLColorTable = GetLColorTable & MakeByte(Green(LocalColorTable(GLCT)))
GetLColorTable = GetLColorTable & MakeByte(Blue(LocalColorTable(GLCT)))
Next
End Function
Private Function GlobalDescriptor()
GlobalDescriptor = 0
If GlobalColorTableFlag Then GlobalDescriptor = GlobalDescriptor Or ShiftLeft(1, 7)
GlobalDescriptor = GlobalDescriptor Or ShiftLeft(ColorResolution, 7)
If SortFlag Then GlobalDescriptor = GlobalDescriptor Or ShiftLeft(1, 3)
GlobalDescriptor = GlobalDescriptor Or GlobalColorTableSize
End Function
Private Function LocalDescriptor()
LocalDescriptor = 0
If LocalColorTableFlag Then LocalDescriptor = LocalDescriptor Or ShiftLeft(1, 7)
If InterlaceFlag Then LocalDescriptor = LocalDescriptor Or ShiftLeft(1, 6)
If SortFlag Then LocalDescriptor = LocallDescriptor Or ShiftLeft(1, 5)
LocalDescriptor = LocalDescriptor Or ShiftLeft(Reserved, 3)
LocalDescriptor = LocalDescriptor Or LocalColorTableSize
End Function
Private Property Get ImageData()
Dim Text, I
ImageData = GIFHeader
ImageData = ImageData & MakeWord(Width_)
ImageData = ImageData & MakeWord(Height_)
ImageData = ImageData & MakeByte(GlobalDescriptor)
ImageData = ImageData & MakeByte(BGroundColorIndex)
ImageData = ImageData & MakeByte(PixelAspectRatio)
ImageData = ImageData & GetGColorTable
If GIF89a Then
If UseTransparency Then
ImageData = ImageData & MakeByte(GraphicControl)
ImageData = ImageData & MakeByte(&HF9)
ImageData = ImageData & MakeByte(&H04)
ImageData = ImageData & MakeByte(&H01)
ImageData = ImageData & MakeByte(&H00)
ImageData = ImageData & MakeByte(TransparentColorIndex)
ImageData = ImageData & MakeByte(&H00)
End If
If Comment <> "" Then
ImageData = ImageData & MakeByte(GraphicControl)
ImageData = ImageData & MakeByte(&HFE)
Text = Left(Comment, &HFF)
ImageData = ImageData & MakeByte(Len(Text))
For I = 1 To Len(Text)
ImageData = ImageData & MakeByte(Asc(Mid(Text, I, 1)))
Next
ImageData = ImageData & MakeByte(&H00)
End If
End If
ImageData = ImageData & MakeByte(Seperator)
ImageData = ImageData & MakeWord(LeftPosition)
ImageData = ImageData & MakeWord(TopPosition)
ImageData = ImageData & MakeWord(Width_)
ImageData = ImageData & MakeWord(Height_)
ImageData = ImageData & MakeByte(LocalDescriptor)
ImageData = ImageData & MakeByte(CodeSize)
ImageData = ImageData & UncompressedData
ImageData = ImageData & MakeByte(&H00)
ImageData = ImageData & MakeByte(EndOfImage)
End Property
Public Sub Write()
Response.ContentType = "image/gif"
Response.BinaryWrite ImageData
End Sub
Private Function GIFHeader()
GIFHeader = ""
GIFHeader = GIFHeader & ChrB(Asc("G"))
GIFHeader = GIFHeader & ChrB(Asc("I"))
GIFHeader = GIFHeader & ChrB(Asc("F"))
GIFHeader = GIFHeader & ChrB(Asc("8"))
If GIF89a Then GIFHeader = GIFHeader & ChrB(Asc("9")) Else GIFHeader = GIFHeader & ChrB(Asc("7")) End If
GIFHeader = GIFHeader & ChrB(Asc("a"))
End Function
Public Sub VerifyCode(Text, VCColor)
Dim I1, I2, I3
Dim VCX, VCY, VCIndex
Resize 14 * Len(Text) + 10, UBound(Letter) + 10, False
Randomize
VCX = Int(Rnd * 10)
VCY = Int(Rnd * (Height_ - UBound(Letter)))
For I1 = 0 To UBound(Letter) - 1
For I2 = 1 To Len(Text)
For I3 = 1 To Len(Font(Mid(Text, I2, 1))(I1))
VCIndex = CLng(Mid(Font(Mid(Text, I2, 1))(I1), I3, 1))
If VCIndex <> 0 Then
If VCColor Then
Randomize
VCIndex = Int(Rnd * 7)
End If
Pixel(VCX + ((I2 - 1) * Len(Letter(0))) + I3, VCY + I1) = VCIndex
End If
Next
Next
Next
End Sub
Public Sub Noises(Amount, NColor)
Dim NI, NIndex
For NI = 1 To Amount
NIndex = 1
If NColor Then
Randomize
NIndex = Int(Rnd * 7)
End If
Pixel(Int(Rnd * Width_), Int(Rnd * Height_)) = NIndex
Next
End Sub
End Class
%>
--------------------------------------------------
Private Sub Class_Terminate()
Font.RemoveAll
Set Font = Nothing
End Sub
Public Property Get Width()
Width = Width_
End Property
Public Property Get Height()
Height = Height_
End Property
Public Property Get Version()
Version = "NetRube VerifyCode Class 1.0 Build 20041225"
End Property
Public Property Let BGroundColor(ByVal Color)
GlobalColorTable(0) = MakeColor(Color)
BGroundColorIndex = 0
End Property
Public Property Let FGroundColor(ByVal Color)
GlobalColorTable(1) = MakeColor(Color)
FGroundColorIndex = 1
End Property
Public Property Get Pixel(ByVal PX, ByVal PY)
If (PX > 0 And PX <= Width_) And (PY > 0 And PY <= Height_) Then
Pixel = AscB(MidB(Image, (Width_ * (PY - 1)) + PX, 1))
Else
Pixel = 0
End If
End Property
Public Property Let Pixel(ByVal PX, ByVal PY, PValue)
Dim Offset
PX = Int(PX)
PY = Int(PY)
PValue = Int(PValue)
Offset = Width_ * (PY - 1)
If (PX > 0 And PX <= Width_) And (PY > 0 And PY <= Height_) Then
Image = LeftB(Image, Offset + (PX - 1)) & ChrB(PValue) & RightB(Image, LenB(Image) - (Offset + PX))
End If
End Property
Public Sub Clear()
Image = String(Width_ * (Height_ + 1) / 2, ChrB(BGroundColorIndex) & ChrB(BGroundColorIndex))
End Sub
Public Sub Resize(ByVal NewWidth, ByVal NewHeight, RPreserve)
Dim OldImage, OldWidth, OldHeight
Dim CopyWidth, CopyHeight
Dim X, Y
If RPreserve Then
OldImage = Image
OldWidth = Width_
OldHeight = Height_
End If
Width_ = NewWidth
Height_ = NewHeight
Clear
If RPreserve Then
If NewWidth > OldWidth Then CopyWidth = OldWidth Else CopyWidth = NewWidth
If NewHeight > OldHeight Then CopyHeight = OldHeight Else CopyHeight = NewHeight
Width_ = NewWidth
Height_ = NewHeight
For Y = 1 To CopyHeight
For X = 1 To CopyWidth
Pixel(X, Y) = AscB(MidB(OldImage, (OldWidth * (Y - 1)) + X, 1))
Next
Next
End If
End Sub
Private Function ShiftLeft(SLValue, SLBits)
ShiftLeft = SLValue * (2 ^ SLBits)
End Function
Private Function ShiftRight(SRValue, SRBits)
ShiftRight = Int(SRValue / (2 ^ SRBits))
End Function
Private Function Low(LValue)
Low = LValue And &HFF
End Function
Private Function High(HValue)
High = ShiftRight(HValue, 8)
End Function
Private Function Blue(BValue)
Blue = Low(ShiftRight(BValue, 16))
End Function
Private Function Green(GValue)
Green = Low(ShiftRight(GValue, 8))
End Function
Private Function Red(RValue)
Red = Low(RValue)
End Function
Private Function MakeColor(MCValue)
MakeColor = CLng("&H" & Right(MCValue, 2) & Mid(MCValue, 4, 2) & Mid(MCValue, 2, 2))
End Function
Private Function GetWord(GWValue)
GetWord = ShiftLeft(AscB(RightB(GWValue, 1)), 8) Or AscB(LeftB(GWValue, 1))
End Function
Private Function MakeWord(MWValue)
MakeWord = ChrB(Low(MWValue)) & ChrB(High(MWValue))
End Function
Private Function MakeByte(MBValue)
MakeByte = ChrB(Low(MBValue))
End Function
Private Function UncompressedData()
Dim ClearCode, ChunkMax, EndOfStream
Dim UDData, UD, U
UncompressedData = ""
ClearCode = 2 ^ Bits
ChunkMax = 2 ^ Bits - 2
EndOfStream = ClearCode + 1
UDData = ""
For U = 1 To LenB(Image) Step ChunkMax
UDData = UDData & MidB(Image, U, ChunkMax) & ChrB(ClearCode)
Next
For U = 1 To LenB(UDData) Step &HFF
UD = MidB(UDData, U, &HFF)
UncompressedData = UncompressedData & MakeByte(LenB(UD)) & UD
Next
UncompressedData = UncompressedData & MakeByte(&H00)
UncompressedData = UncompressedData & MakeByte(EndOfStream)
End Function
Private Function GetGColorTable()
Dim GGCT
GetGColorTable = ""
For GGCT = 0 To UBound(GlobalColorTable) - 1
GetGColorTable = GetGColorTable & MakeByte(Red(GlobalColorTable(GGCT)))
GetGColorTable = GetGColorTable & MakeByte(Green(GlobalColorTable(GGCT)))
GetGColorTable = GetGColorTable & MakeByte(Blue(GlobalColorTable(GGCT)))
Next
End Function
Private Function GetLColorTable()
Dim GLCT
GetLColorTable = ""
For GLCT = 0 To UBound(LocalColorTable) - 1
GetLColorTable = GetLColorTable & MakeByte(Red(LocalColorTable(GLCT)))
GetLColorTable = GetLColorTable & MakeByte(Green(LocalColorTable(GLCT)))
GetLColorTable = GetLColorTable & MakeByte(Blue(LocalColorTable(GLCT)))
Next
End Function
Private Function GlobalDescriptor()
GlobalDescriptor = 0
If GlobalColorTableFlag Then GlobalDescriptor = GlobalDescriptor Or ShiftLeft(1, 7)
GlobalDescriptor = GlobalDescriptor Or ShiftLeft(ColorResolution, 7)
If SortFlag Then GlobalDescriptor = GlobalDescriptor Or ShiftLeft(1, 3)
GlobalDescriptor = GlobalDescriptor Or GlobalColorTableSize
End Function
Private Function LocalDescriptor()
LocalDescriptor = 0
If LocalColorTableFlag Then LocalDescriptor = LocalDescriptor Or ShiftLeft(1, 7)
If InterlaceFlag Then LocalDescriptor = LocalDescriptor Or ShiftLeft(1, 6)
If SortFlag Then LocalDescriptor = LocallDescriptor Or ShiftLeft(1, 5)
LocalDescriptor = LocalDescriptor Or ShiftLeft(Reserved, 3)
LocalDescriptor = LocalDescriptor Or LocalColorTableSize
End Function
Private Property Get ImageData()
Dim Text, I
ImageData = GIFHeader
ImageData = ImageData & MakeWord(Width_)
ImageData = ImageData & MakeWord(Height_)
ImageData = ImageData & MakeByte(GlobalDescriptor)
ImageData = ImageData & MakeByte(BGroundColorIndex)
ImageData = ImageData & MakeByte(PixelAspectRatio)
ImageData = ImageData & GetGColorTable
If GIF89a Then
If UseTransparency Then
ImageData = ImageData & MakeByte(GraphicControl)
ImageData = ImageData & MakeByte(&HF9)
ImageData = ImageData & MakeByte(&H04)
ImageData = ImageData & MakeByte(&H01)
ImageData = ImageData & MakeByte(&H00)
ImageData = ImageData & MakeByte(TransparentColorIndex)
ImageData = ImageData & MakeByte(&H00)
End If
If Comment <> "" Then
ImageData = ImageData & MakeByte(GraphicControl)
ImageData = ImageData & MakeByte(&HFE)
Text = Left(Comment, &HFF)
ImageData = ImageData & MakeByte(Len(Text))
For I = 1 To Len(Text)
ImageData = ImageData & MakeByte(Asc(Mid(Text, I, 1)))
Next
ImageData = ImageData & MakeByte(&H00)
End If
End If
ImageData = ImageData & MakeByte(Seperator)
ImageData = ImageData & MakeWord(LeftPosition)
ImageData = ImageData & MakeWord(TopPosition)
ImageData = ImageData & MakeWord(Width_)
ImageData = ImageData & MakeWord(Height_)
ImageData = ImageData & MakeByte(LocalDescriptor)
ImageData = ImageData & MakeByte(CodeSize)
ImageData = ImageData & UncompressedData
ImageData = ImageData & MakeByte(&H00)
ImageData = ImageData & MakeByte(EndOfImage)
End Property
Public Sub Write()
Response.ContentType = "image/gif"
Response.BinaryWrite ImageData
End Sub
Private Function GIFHeader()
GIFHeader = ""
GIFHeader = GIFHeader & ChrB(Asc("G"))
GIFHeader = GIFHeader & ChrB(Asc("I"))
GIFHeader = GIFHeader & ChrB(Asc("F"))
GIFHeader = GIFHeader & ChrB(Asc("8"))
If GIF89a Then GIFHeader = GIFHeader & ChrB(Asc("9")) Else GIFHeader = GIFHeader & ChrB(Asc("7")) End If
GIFHeader = GIFHeader & ChrB(Asc("a"))
End Function
Public Sub VerifyCode(Text, VCColor)
Dim I1, I2, I3
Dim VCX, VCY, VCIndex
Resize 14 * Len(Text) + 10, UBound(Letter) + 10, False
Randomize
VCX = Int(Rnd * 10)
VCY = Int(Rnd * (Height_ - UBound(Letter)))
For I1 = 0 To UBound(Letter) - 1
For I2 = 1 To Len(Text)
For I3 = 1 To Len(Font(Mid(Text, I2, 1))(I1))
VCIndex = CLng(Mid(Font(Mid(Text, I2, 1))(I1), I3, 1))
If VCIndex <> 0 Then
If VCColor Then
Randomize
VCIndex = Int(Rnd * 7)
End If
Pixel(VCX + ((I2 - 1) * Len(Letter(0))) + I3, VCY + I1) = VCIndex
End If
Next
Next
Next
End Sub
Public Sub Noises(Amount, NColor)
Dim NI, NIndex
For NI = 1 To Amount
NIndex = 1
If NColor Then
Randomize
NIndex = Int(Rnd * 7)
End If
Pixel(Int(Rnd * Width_), Int(Rnd * Height_)) = NIndex
Next
End Sub
End Class
%>
--------------------------------------------------
iphone8 2010-11-14
- 打赏
- 举报
我提供一个简单的数字验证码吧，使用起来很简单，把下面的代码全部复制保存为safecode.asp，直接把IMG指向该ASP文件即可。不过需要做判断语句的，具体要看你怎么来使用了。
--------------------------------------------------
<%
Option Explicit
'Session.CodePage = 65001
'Response.Charset = "UTF-8"
Response.Expires = -1
Response.AddHeader "Pragma", "no-cache"
Response.AddHeader "cache-ctrol", "no-cache"
Dim VC, Code
Randomize
Set VC = New NetRube_VerifyCode
With VC
Code = Int(Rnd * 9000 + 1000)
Session("cnbruce.com_ValidateCode") = ""&Code
.BGroundColor = "#DEF4FF" ' 图片背景颜色
.FGroundColor = "#085485" ' 前景（文本）颜色
.VerifyCode Code, false'False ' 处理验证码，第二个参数为是否显示彩色文本
.Noises 50, true ' 添加杂点，第一个参数为杂点数量，第二个参数为是否显示彩色杂点
.Write ' 输出图片
End With
Set VC = Nothing
Class NetRube_VerifyCode
Public GlobalColorTable(), LocalColorTable()
Public TransparentColorIndex, UseTransparency
Public GIF89a
Public Comment
Private FGroundColorIndex, BGroundColorIndex
Private Image
Private GlobalColorTableSize, GlobalColorTableFlag, LocalColorTableSize, LocalColorTableFlag
Private Width_, Height_
Private LeftPosition, TopPosition
Private Bits, ColorResolution, CodeSize
Private PixelAspectRatio
Private SortFlag, InterlaceFlag
Private Seperator, GraphicControl, EndOfImage
Private Reserved
Private Font
Private Letter(19)
Private Sub Class_Initialize()
Image = ""
GIF89a = False
ReDim GlobalColorTable(256)
GlobalColorTableSize = 7
GlobalColorTableFlag = True
GlobalColorTable(2) = RGB(255, 0, 0)
GlobalColorTable(3) = RGB(0, 255, 0)
GlobalColorTable(4) = RGB(0, 0, 255)
GlobalColorTable(5) = RGB(255, 255, 0)
GlobalColorTable(6) = RGB(0, 255, 255)
GlobalColorTable(7) = RGB(255, 0, 255)
ReDim LocalColorTable(0)
LocalColorTableSize = 0
LocalColorTableFlag = False
ColorResolution = 7
Bits = 7
CodeSize = 7
BGroundColorIndex = 0
FGroundColorIndex = 1
TransparentColorIndex = 0
UseTransparency = False
LeftPosition = 0
TopPosition = 0
Width_ = 20
Height_ = 20
Clear
PixelAspectRatio = 0
SortFlag = False
InterlaceFlag = False
Seperator = Asc(",")
GraphicControl = Asc("!")
EndOfImage = Asc(";")
Comment = ""
Reserved = 0
Set Font = Server.CreateObject("Scripting.Dictionary")
Letter(0) = "00000000000000"
Letter(1) = "00001111100000"
Letter(2) = "00011111110000"
Letter(3) = "00111000111000"
Letter(4) = "00110000011100"
Letter(5) = "01110000001100"
Letter(6) = "01100000001110"
Letter(7) = "01100000001110"
Letter(8) = "11100000001110"
Letter(9) = "11000000001110"
Letter(10) = "11000000001110"
Letter(11) = "11100000001110"
Letter(12) = "11100000001100"
Letter(13) = "11100000001100"
Letter(14) = "01100000001100"
Letter(15) = "01110000011100"
Letter(15) = "00111000011000"
Letter(16) = "00011111110000"
Letter(17) = "00001111100000"
Letter(18) = "00000000000000"
Font.Add "0", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000001110000"
Letter(2) = "00000001110000"
Letter(3) = "00000011100000"
Letter(4) = "00000011000000"
Letter(5) = "00000011000000"
Letter(6) = "00000011000000"
Letter(7) = "00000111000000"
Letter(8) = "00000111000000"
Letter(9) = "00000111000000"
Letter(10) = "00000110000000"
Letter(11) = "00000110000000"
Letter(12) = "00000110000000"
Letter(13) = "00000110000000"
Letter(14) = "00000110000000"
Letter(15) = "00000110000000"
Letter(15) = "00000110000000"
Letter(16) = "00000110000000"
Letter(17) = "00000010000000"
Letter(18) = "00000000000000"
Font.Add "1", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111110000"
Letter(2) = "00011111111000"
Letter(3) = "00111000011100"
Letter(4) = "01110000011100"
Letter(5) = "01110000011000"
Letter(6) = "01100000011000"
Letter(7) = "00000000111000"
Letter(8) = "00000001110000"
Letter(9) = "00000001110000"
Letter(10) = "00000011000000"
Letter(11) = "00000111000000"
Letter(12) = "00001110000000"
Letter(13) = "00011000000000"
Letter(14) = "00011000000000"
Letter(15) = "00110000011100"
Letter(16) = "01101111111100"
Letter(17) = "01111111111110"
Letter(18) = "01111100000000"
Letter(19) = "00000000000000"
Font.Add "2", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111111000"
Letter(2) = "00111111111000"
Letter(3) = "01110000111100"
Letter(4) = "01100000011000"
Letter(5) = "01000000111000"
Letter(6) = "00000000111000"
Letter(7) = "00000001110000"
Letter(8) = "00000011000000"
Letter(9) = "00000111110000"
Letter(10) = "00000100111000"
Letter(11) = "00000000011100"
Letter(12) = "00000000011100"
Letter(13) = "00000000011100"
Letter(14) = "00000000011100"
Letter(15) = "00000000011000"
Letter(16) = "11100000111000"
Letter(17) = "11111111110000"
Letter(18) = "01111111100000"
Letter(19) = "00000000000000"
Font.Add "3", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000000111000"
Letter(2) = "00000001111000"
Letter(3) = "00000011100000"
Letter(4) = "00000111011100"
Letter(5) = "00001110011100"
Letter(6) = "00001100011000"
Letter(7) = "00011000111000"
Letter(8) = "00111000110000"
Letter(9) = "01110000110000"
Letter(10) = "01100000110000"
Letter(11) = "01100000110000"
Letter(12) = "11000111111110"
Letter(13) = "11111111111100"
Letter(14) = "11111111100000"
Letter(15) = "11100001100000"
Letter(16) = "00000001110000"
Letter(17) = "00000000110000"
Letter(18) = "00000000110000"
Letter(19) = "00000000100000"
Font.Add "4", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001100000100"
Letter(2) = "00011111111110"
Letter(3) = "00011111111100"
Letter(4) = "00011110000000"
Letter(5) = "00011000000000"
Letter(6) = "00111000000000"
Letter(7) = "00111000000000"
Letter(8) = "00111111110000"
Letter(9) = "00111111111000"
Letter(10) = "00000000011000"
Letter(11) = "00000000011000"
Letter(12) = "00000000011000"
Letter(13) = "00000000011000"
Letter(14) = "00000000011000"
Letter(15) = "00000000011000"
Letter(16) = "00000001111000"
Letter(17) = "01111111110000"
Letter(18) = "00111111000000"
Letter(19) = "00000000100000"
Font.Add "5", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000011110000"
Letter(2) = "00000111100000"
Letter(3) = "00001110000000"
Letter(4) = "00011100000000"
Letter(5) = "00111000000000"
Letter(6) = "00110000000000"
Letter(7) = "00110000000000"
Letter(8) = "01111111110000"
Letter(9) = "01111111111000"
Letter(10) = "01110000011100"
Letter(11) = "01100000001100"
Letter(12) = "01100000001100"
Letter(13) = "01100000001100"
Letter(14) = "01100000001100"
Letter(15) = "01110000011100"
Letter(16) = "00110000011100"
Letter(17) = "00111111111000"
Letter(18) = "00011111110000"
Letter(19) = "00000000000000"
Font.Add "6", Letter
Letter(0) = "00000000000000"
Letter(1) = "00100111111110"
Letter(2) = "01111111111100"
Letter(3) = "01111110011100"
Letter(4) = "00000000011000"
Letter(5) = "00000000111000"
Letter(6) = "00000000110000"
Letter(7) = "00000000110000"
Letter(8) = "00000000110000"
Letter(9) = "00000001110000"
Letter(10) = "00000001100000"
Letter(11) = "00000001100000"
Letter(12) = "00000001100000"
Letter(13) = "00000001100000"
Letter(14) = "00000011100000"
Letter(15) = "00000011100000"
Letter(16) = "00000011100000"
Letter(17) = "00000001000000"
Letter(18) = "00000001000000"
Letter(19) = "00000000000000"
Font.Add "7", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111110000"
Letter(2) = "00011111111000"
Letter(3) = "00111000011000"
Letter(4) = "00110000011000"
Letter(5) = "01110000011100"
Letter(6) = "01110000011000"
Letter(7) = "00110000011000"
Letter(8) = "00111101111000"
Letter(9) = "00011111111000"
Letter(10) = "00111000111100"
Letter(11) = "01110000001100"
Letter(12) = "01110000001100"
Letter(13) = "01100000001110"
Letter(14) = "01100000001100"
Letter(15) = "01100000001100"
Letter(16) = "01110000011100"
Letter(17) = "00111111111100"
Letter(18) = "00011111110000"
Letter(19) = "00000000000000"
Font.Add "8", Letter
Letter(0) = "00000000000000"
Letter(1) = "00011111110000"
Letter(2) = "00111111111000"
Letter(3) = "01110000111000"
Letter(4) = "01110000011100"
Letter(5) = "01100000001100"
Letter(6) = "01100000001100"
Letter(7) = "01100000001100"
Letter(8) = "01100000001100"
Letter(9) = "01110000011100"
Letter(10) = "00111111111100"
Letter(11) = "00011111111100"
Letter(12) = "00000000011000"
Letter(13) = "00000000011000"
Letter(14) = "00000000111000"
Letter(15) = "00000001110000"
Letter(16) = "00000011100000"
Letter(17) = "00000111000000"
Letter(18) = "00011110000000"
Letter(19) = "00000000000000"
Font.Add "9", Letter
End Sub
--------------------------------------------------
<%
Option Explicit
'Session.CodePage = 65001
'Response.Charset = "UTF-8"
Response.Expires = -1
Response.AddHeader "Pragma", "no-cache"
Response.AddHeader "cache-ctrol", "no-cache"
Dim VC, Code
Randomize
Set VC = New NetRube_VerifyCode
With VC
Code = Int(Rnd * 9000 + 1000)
Session("cnbruce.com_ValidateCode") = ""&Code
.BGroundColor = "#DEF4FF" ' 图片背景颜色
.FGroundColor = "#085485" ' 前景（文本）颜色
.VerifyCode Code, false'False ' 处理验证码，第二个参数为是否显示彩色文本
.Noises 50, true ' 添加杂点，第一个参数为杂点数量，第二个参数为是否显示彩色杂点
.Write ' 输出图片
End With
Set VC = Nothing
Class NetRube_VerifyCode
Public GlobalColorTable(), LocalColorTable()
Public TransparentColorIndex, UseTransparency
Public GIF89a
Public Comment
Private FGroundColorIndex, BGroundColorIndex
Private Image
Private GlobalColorTableSize, GlobalColorTableFlag, LocalColorTableSize, LocalColorTableFlag
Private Width_, Height_
Private LeftPosition, TopPosition
Private Bits, ColorResolution, CodeSize
Private PixelAspectRatio
Private SortFlag, InterlaceFlag
Private Seperator, GraphicControl, EndOfImage
Private Reserved
Private Font
Private Letter(19)
Private Sub Class_Initialize()
Image = ""
GIF89a = False
ReDim GlobalColorTable(256)
GlobalColorTableSize = 7
GlobalColorTableFlag = True
GlobalColorTable(2) = RGB(255, 0, 0)
GlobalColorTable(3) = RGB(0, 255, 0)
GlobalColorTable(4) = RGB(0, 0, 255)
GlobalColorTable(5) = RGB(255, 255, 0)
GlobalColorTable(6) = RGB(0, 255, 255)
GlobalColorTable(7) = RGB(255, 0, 255)
ReDim LocalColorTable(0)
LocalColorTableSize = 0
LocalColorTableFlag = False
ColorResolution = 7
Bits = 7
CodeSize = 7
BGroundColorIndex = 0
FGroundColorIndex = 1
TransparentColorIndex = 0
UseTransparency = False
LeftPosition = 0
TopPosition = 0
Width_ = 20
Height_ = 20
Clear
PixelAspectRatio = 0
SortFlag = False
InterlaceFlag = False
Seperator = Asc(",")
GraphicControl = Asc("!")
EndOfImage = Asc(";")
Comment = ""
Reserved = 0
Set Font = Server.CreateObject("Scripting.Dictionary")
Letter(0) = "00000000000000"
Letter(1) = "00001111100000"
Letter(2) = "00011111110000"
Letter(3) = "00111000111000"
Letter(4) = "00110000011100"
Letter(5) = "01110000001100"
Letter(6) = "01100000001110"
Letter(7) = "01100000001110"
Letter(8) = "11100000001110"
Letter(9) = "11000000001110"
Letter(10) = "11000000001110"
Letter(11) = "11100000001110"
Letter(12) = "11100000001100"
Letter(13) = "11100000001100"
Letter(14) = "01100000001100"
Letter(15) = "01110000011100"
Letter(15) = "00111000011000"
Letter(16) = "00011111110000"
Letter(17) = "00001111100000"
Letter(18) = "00000000000000"
Font.Add "0", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000001110000"
Letter(2) = "00000001110000"
Letter(3) = "00000011100000"
Letter(4) = "00000011000000"
Letter(5) = "00000011000000"
Letter(6) = "00000011000000"
Letter(7) = "00000111000000"
Letter(8) = "00000111000000"
Letter(9) = "00000111000000"
Letter(10) = "00000110000000"
Letter(11) = "00000110000000"
Letter(12) = "00000110000000"
Letter(13) = "00000110000000"
Letter(14) = "00000110000000"
Letter(15) = "00000110000000"
Letter(15) = "00000110000000"
Letter(16) = "00000110000000"
Letter(17) = "00000010000000"
Letter(18) = "00000000000000"
Font.Add "1", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111110000"
Letter(2) = "00011111111000"
Letter(3) = "00111000011100"
Letter(4) = "01110000011100"
Letter(5) = "01110000011000"
Letter(6) = "01100000011000"
Letter(7) = "00000000111000"
Letter(8) = "00000001110000"
Letter(9) = "00000001110000"
Letter(10) = "00000011000000"
Letter(11) = "00000111000000"
Letter(12) = "00001110000000"
Letter(13) = "00011000000000"
Letter(14) = "00011000000000"
Letter(15) = "00110000011100"
Letter(16) = "01101111111100"
Letter(17) = "01111111111110"
Letter(18) = "01111100000000"
Letter(19) = "00000000000000"
Font.Add "2", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111111000"
Letter(2) = "00111111111000"
Letter(3) = "01110000111100"
Letter(4) = "01100000011000"
Letter(5) = "01000000111000"
Letter(6) = "00000000111000"
Letter(7) = "00000001110000"
Letter(8) = "00000011000000"
Letter(9) = "00000111110000"
Letter(10) = "00000100111000"
Letter(11) = "00000000011100"
Letter(12) = "00000000011100"
Letter(13) = "00000000011100"
Letter(14) = "00000000011100"
Letter(15) = "00000000011000"
Letter(16) = "11100000111000"
Letter(17) = "11111111110000"
Letter(18) = "01111111100000"
Letter(19) = "00000000000000"
Font.Add "3", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000000111000"
Letter(2) = "00000001111000"
Letter(3) = "00000011100000"
Letter(4) = "00000111011100"
Letter(5) = "00001110011100"
Letter(6) = "00001100011000"
Letter(7) = "00011000111000"
Letter(8) = "00111000110000"
Letter(9) = "01110000110000"
Letter(10) = "01100000110000"
Letter(11) = "01100000110000"
Letter(12) = "11000111111110"
Letter(13) = "11111111111100"
Letter(14) = "11111111100000"
Letter(15) = "11100001100000"
Letter(16) = "00000001110000"
Letter(17) = "00000000110000"
Letter(18) = "00000000110000"
Letter(19) = "00000000100000"
Font.Add "4", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001100000100"
Letter(2) = "00011111111110"
Letter(3) = "00011111111100"
Letter(4) = "00011110000000"
Letter(5) = "00011000000000"
Letter(6) = "00111000000000"
Letter(7) = "00111000000000"
Letter(8) = "00111111110000"
Letter(9) = "00111111111000"
Letter(10) = "00000000011000"
Letter(11) = "00000000011000"
Letter(12) = "00000000011000"
Letter(13) = "00000000011000"
Letter(14) = "00000000011000"
Letter(15) = "00000000011000"
Letter(16) = "00000001111000"
Letter(17) = "01111111110000"
Letter(18) = "00111111000000"
Letter(19) = "00000000100000"
Font.Add "5", Letter
Letter(0) = "00000000000000"
Letter(1) = "00000011110000"
Letter(2) = "00000111100000"
Letter(3) = "00001110000000"
Letter(4) = "00011100000000"
Letter(5) = "00111000000000"
Letter(6) = "00110000000000"
Letter(7) = "00110000000000"
Letter(8) = "01111111110000"
Letter(9) = "01111111111000"
Letter(10) = "01110000011100"
Letter(11) = "01100000001100"
Letter(12) = "01100000001100"
Letter(13) = "01100000001100"
Letter(14) = "01100000001100"
Letter(15) = "01110000011100"
Letter(16) = "00110000011100"
Letter(17) = "00111111111000"
Letter(18) = "00011111110000"
Letter(19) = "00000000000000"
Font.Add "6", Letter
Letter(0) = "00000000000000"
Letter(1) = "00100111111110"
Letter(2) = "01111111111100"
Letter(3) = "01111110011100"
Letter(4) = "00000000011000"
Letter(5) = "00000000111000"
Letter(6) = "00000000110000"
Letter(7) = "00000000110000"
Letter(8) = "00000000110000"
Letter(9) = "00000001110000"
Letter(10) = "00000001100000"
Letter(11) = "00000001100000"
Letter(12) = "00000001100000"
Letter(13) = "00000001100000"
Letter(14) = "00000011100000"
Letter(15) = "00000011100000"
Letter(16) = "00000011100000"
Letter(17) = "00000001000000"
Letter(18) = "00000001000000"
Letter(19) = "00000000000000"
Font.Add "7", Letter
Letter(0) = "00000000000000"
Letter(1) = "00001111110000"
Letter(2) = "00011111111000"
Letter(3) = "00111000011000"
Letter(4) = "00110000011000"
Letter(5) = "01110000011100"
Letter(6) = "01110000011000"
Letter(7) = "00110000011000"
Letter(8) = "00111101111000"
Letter(9) = "00011111111000"
Letter(10) = "00111000111100"
Letter(11) = "01110000001100"
Letter(12) = "01110000001100"
Letter(13) = "01100000001110"
Letter(14) = "01100000001100"
Letter(15) = "01100000001100"
Letter(16) = "01110000011100"
Letter(17) = "00111111111100"
Letter(18) = "00011111110000"
Letter(19) = "00000000000000"
Font.Add "8", Letter
Letter(0) = "00000000000000"
Letter(1) = "00011111110000"
Letter(2) = "00111111111000"
Letter(3) = "01110000111000"
Letter(4) = "01110000011100"
Letter(5) = "01100000001100"
Letter(6) = "01100000001100"
Letter(7) = "01100000001100"
Letter(8) = "01100000001100"
Letter(9) = "01110000011100"
Letter(10) = "00111111111100"
Letter(11) = "00011111111100"
Letter(12) = "00000000011000"
Letter(13) = "00000000011000"
Letter(14) = "00000000111000"
Letter(15) = "00000001110000"
Letter(16) = "00000011100000"
Letter(17) = "00000111000000"
Letter(18) = "00011110000000"
Letter(19) = "00000000000000"
Font.Add "9", Letter
End Sub
superbigbird 2010-11-14
- 打赏
- 举报
垃圾软件都是手工输入的
play123aaa 2010-11-13
- 打赏
- 举报
呵呵呵 ~~~ 搜到了也给我发一份过来 学习学习！！
play123aaa 2010-11-13
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自己去搜搜吧 应该有的啊 肯定有的
一aa一 2010-11-13
- 打赏
- 举报
我想知道用中文做验证码的是怎么做的 有人知道么？
一aa一 2010-11-12
- 打赏
- 举报
谢谢 xmrxw 提供的源码
xmrxw 2010-11-12
- 打赏
- 举报
再接下面代码：
Sub CDGen_Blur()
' 对产生的位图进行柔化处理
Dim i, j
For j = 1 To nPixelHeight - 2
For i = 1 To nCharCount * nPixelWidth - 2
If Buf(j, i) = 0 Then
If ((Buf(j, i - 1) Or Buf(j + 1, i)) And 1) <> 0 Then
' 如果当前点是空白点，且上下左右四个点中有一个点是有色点，则该点做柔化处理
Buf(j, i) = 2
End If
End If
Next
Next
End Sub
Sub CDGen_NoisyDot()
' 对产生的位图进行噪点处理
Dim i, j, NoisyDot, CurDot
For j = 0 To nPixelHeight - 1
For i = 0 To nCharCount * nPixelWidth - 1
If Buf(j, i) <> 0 Then
NoisyDot = Int(Rnd * Rnd * nMaxSaturation)
Select Case nColorNoisyDotOdds
Case 0
CurDot = nMaxSaturation
Case 1
CurDot = 0
Case Else
CurDot = NoisyDot
End Select
If Rnd < nColorNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = nMaxSaturation
Else
NoisyDot = Int(Rnd * nMaxSaturation)
Select Case nBlankNoisyDotOdds
Case 0
CurDot = 0
Case 1
CurDot = nMaxSaturation
Case Else
CurDot = NoisyDot
End Select
If Rnd < nBlankNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = 0
End If
Next
Next
End Sub
Sub CDGen()
' 生成位图阵列
Dim i, Ch
DigtalStr = ""
CDGen_Clear
For i = 0 To nCharCount - 1
Ch = Mid(cCharSet, Int(Rnd * Len(cCharSet)) + 1, 1)
DigtalStr = DigtalStr + Ch
CDGen_Char Ch, i * nPixelWidth, 0
Next
CDGen_Blur
CDGen_NoisyDot
End Sub
Function HSBToRGB(vH, vS, vB)
' 将颜色值由HSB转换为RGB
Dim aRGB(3), RGB1st, RGB2nd, RGB3rd
Dim nH, nS, nB
Dim lH, nF, nP, nQ, nT
vH = (vH Mod 360)
If vS > 100 Then
vS = 100
ElseIf vS < 0 Then
vS = 0
End If
If vB > 100 Then
vB = 100
ElseIf vB < 0 Then
vB = 0
End If
If vS > 0 Then
nH = vH / 60
nS = vS / 100
nB = vB / 100
lH = Int(nH)
nF = nH - lH
nP = nB * (1 - nS)
nQ = nB * (1 - nS * nF)
nT = nB * (1 - nS * (1 - nF))
Select Case lH
Case 0
aRGB(0) = nB * 255
aRGB(1) = nT * 255
aRGB(2) = nP * 255
Case 1
aRGB(0) = nQ * 255
aRGB(1) = nB * 255
aRGB(2) = nP * 255
Case 2
aRGB(0) = nP * 255
aRGB(1) = nB * 255
aRGB(2) = nT * 255
Case 3
aRGB(0) = nP * 255
aRGB(1) = nQ * 255
aRGB(2) = nB * 255
Case 4
aRGB(0) = nT * 255
aRGB(1) = nP * 255
aRGB(2) = nB * 255
Case 5
aRGB(0) = nB * 255
aRGB(1) = nP * 255
aRGB(2) = nQ * 255
End Select
Else
aRGB(0) = (vB * 255) / 100
aRGB(1) = aRGB(0)
aRGB(2) = aRGB(0)
End If
HSBToRGB = ChrB(Round(aRGB(2), 0)) & ChrB(Round(aRGB(1), 0)) & ChrB(Round(aRGB(0), 0))
End Function
Sub CreatValidCode(pSN)
Dim i, j, CurColorHue
' 禁止缓存
Response.Expires = -9999
Response.AddHeader "pragma", "no-cache"
Response.AddHeader "cache-ctrol", "no-cache"
Response.ContentType = "image/bmp"
Call CDGen
Session(pSN) = DigtalStr '记录入Session
Dim PicWidth, PicHeight, FileSize, PicDataSize
PicWidth = nCharCount * nPixelWidth
PicHeight = nPixelHeight
PicDataSize = PicWidth * PicHeight * 3
FileSize = PicDataSize + 54
' 输出BMP文件信息头
Response.BinaryWrite ChrB(66) & ChrB(77) & _
ChrB(FileSize Mod 256) & ChrB((FileSize \ 256) Mod 256) & ChrB((FileSize \ 256 \ 256) Mod 256) & ChrB(FileSize \ 256 \ 256 \ 256) & _
ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0)
' 输出BMP位图信息头
Response.BinaryWrite ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(PicWidth Mod 256) & ChrB((PicWidth \ 256) Mod 256) & ChrB((PicWidth \ 256 \ 256) Mod 256) & ChrB(PicWidth \ 256 \ 256 \ 256) & _
ChrB(PicHeight Mod 256) & ChrB((PicHeight \ 256) Mod 256) & ChrB((PicHeight \ 256 \ 256) Mod 256) & ChrB(PicHeight \ 256 \ 256 \ 256) & _
ChrB(1) & ChrB(0) & _
ChrB(24) & ChrB(0) & _
ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(PicDataSize Mod 256) & ChrB((PicDataSize \ 256) Mod 256) & ChrB((PicDataSize \ 256 \ 256) Mod 256) & ChrB(PicDataSize \ 256 \ 256 \ 256) & _
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)
' 逐点输出位图阵列
If nColorHue = -1 Then
CurColorHue = Int(Rnd * 360)
ElseIf nColorHue = -2 Then
CurColorHue = 0
Else
CurColorHue = nColorHue
End If
For j = 0 To nPixelHeight - 1
For i = 0 To Len(DigtalStr) * nPixelWidth - 1
If nColorHue = -2 Then
Response.BinaryWrite HSBToRGB(CurColorHue, 0, 100 - Buf(nPixelHeight - 1 - j, i))
Else
Response.BinaryWrite HSBToRGB(CurColorHue, Buf(nPixelHeight - 1 - j, i), 100)
End If
Next
Next
End Sub
%>
Sub CDGen_Blur()
' 对产生的位图进行柔化处理
Dim i, j
For j = 1 To nPixelHeight - 2
For i = 1 To nCharCount * nPixelWidth - 2
If Buf(j, i) = 0 Then
If ((Buf(j, i - 1) Or Buf(j + 1, i)) And 1) <> 0 Then
' 如果当前点是空白点，且上下左右四个点中有一个点是有色点，则该点做柔化处理
Buf(j, i) = 2
End If
End If
Next
Next
End Sub
Sub CDGen_NoisyDot()
' 对产生的位图进行噪点处理
Dim i, j, NoisyDot, CurDot
For j = 0 To nPixelHeight - 1
For i = 0 To nCharCount * nPixelWidth - 1
If Buf(j, i) <> 0 Then
NoisyDot = Int(Rnd * Rnd * nMaxSaturation)
Select Case nColorNoisyDotOdds
Case 0
CurDot = nMaxSaturation
Case 1
CurDot = 0
Case Else
CurDot = NoisyDot
End Select
If Rnd < nColorNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = nMaxSaturation
Else
NoisyDot = Int(Rnd * nMaxSaturation)
Select Case nBlankNoisyDotOdds
Case 0
CurDot = 0
Case 1
CurDot = nMaxSaturation
Case Else
CurDot = NoisyDot
End Select
If Rnd < nBlankNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = 0
End If
Next
Next
End Sub
Sub CDGen()
' 生成位图阵列
Dim i, Ch
DigtalStr = ""
CDGen_Clear
For i = 0 To nCharCount - 1
Ch = Mid(cCharSet, Int(Rnd * Len(cCharSet)) + 1, 1)
DigtalStr = DigtalStr + Ch
CDGen_Char Ch, i * nPixelWidth, 0
Next
CDGen_Blur
CDGen_NoisyDot
End Sub
Function HSBToRGB(vH, vS, vB)
' 将颜色值由HSB转换为RGB
Dim aRGB(3), RGB1st, RGB2nd, RGB3rd
Dim nH, nS, nB
Dim lH, nF, nP, nQ, nT
vH = (vH Mod 360)
If vS > 100 Then
vS = 100
ElseIf vS < 0 Then
vS = 0
End If
If vB > 100 Then
vB = 100
ElseIf vB < 0 Then
vB = 0
End If
If vS > 0 Then
nH = vH / 60
nS = vS / 100
nB = vB / 100
lH = Int(nH)
nF = nH - lH
nP = nB * (1 - nS)
nQ = nB * (1 - nS * nF)
nT = nB * (1 - nS * (1 - nF))
Select Case lH
Case 0
aRGB(0) = nB * 255
aRGB(1) = nT * 255
aRGB(2) = nP * 255
Case 1
aRGB(0) = nQ * 255
aRGB(1) = nB * 255
aRGB(2) = nP * 255
Case 2
aRGB(0) = nP * 255
aRGB(1) = nB * 255
aRGB(2) = nT * 255
Case 3
aRGB(0) = nP * 255
aRGB(1) = nQ * 255
aRGB(2) = nB * 255
Case 4
aRGB(0) = nT * 255
aRGB(1) = nP * 255
aRGB(2) = nB * 255
Case 5
aRGB(0) = nB * 255
aRGB(1) = nP * 255
aRGB(2) = nQ * 255
End Select
Else
aRGB(0) = (vB * 255) / 100
aRGB(1) = aRGB(0)
aRGB(2) = aRGB(0)
End If
HSBToRGB = ChrB(Round(aRGB(2), 0)) & ChrB(Round(aRGB(1), 0)) & ChrB(Round(aRGB(0), 0))
End Function
Sub CreatValidCode(pSN)
Dim i, j, CurColorHue
' 禁止缓存
Response.Expires = -9999
Response.AddHeader "pragma", "no-cache"
Response.AddHeader "cache-ctrol", "no-cache"
Response.ContentType = "image/bmp"
Call CDGen
Session(pSN) = DigtalStr '记录入Session
Dim PicWidth, PicHeight, FileSize, PicDataSize
PicWidth = nCharCount * nPixelWidth
PicHeight = nPixelHeight
PicDataSize = PicWidth * PicHeight * 3
FileSize = PicDataSize + 54
' 输出BMP文件信息头
Response.BinaryWrite ChrB(66) & ChrB(77) & _
ChrB(FileSize Mod 256) & ChrB((FileSize \ 256) Mod 256) & ChrB((FileSize \ 256 \ 256) Mod 256) & ChrB(FileSize \ 256 \ 256 \ 256) & _
ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0)
' 输出BMP位图信息头
Response.BinaryWrite ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(PicWidth Mod 256) & ChrB((PicWidth \ 256) Mod 256) & ChrB((PicWidth \ 256 \ 256) Mod 256) & ChrB(PicWidth \ 256 \ 256 \ 256) & _
ChrB(PicHeight Mod 256) & ChrB((PicHeight \ 256) Mod 256) & ChrB((PicHeight \ 256 \ 256) Mod 256) & ChrB(PicHeight \ 256 \ 256 \ 256) & _
ChrB(1) & ChrB(0) & _
ChrB(24) & ChrB(0) & _
ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _
ChrB(PicDataSize Mod 256) & ChrB((PicDataSize \ 256) Mod 256) & ChrB((PicDataSize \ 256 \ 256) Mod 256) & ChrB(PicDataSize \ 256 \ 256 \ 256) & _
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)
' 逐点输出位图阵列
If nColorHue = -1 Then
CurColorHue = Int(Rnd * 360)
ElseIf nColorHue = -2 Then
CurColorHue = 0
Else
CurColorHue = nColorHue
End If
For j = 0 To nPixelHeight - 1
For i = 0 To Len(DigtalStr) * nPixelWidth - 1
If nColorHue = -2 Then
Response.BinaryWrite HSBToRGB(CurColorHue, 0, 100 - Buf(nPixelHeight - 1 - j, i))
Else
Response.BinaryWrite HSBToRGB(CurColorHue, Buf(nPixelHeight - 1 - j, i), 100)
End If
Next
Next
End Sub
%>
xmrxw 2010-11-12
- 打赏
- 举报
下接下面的代码：
Sub CDGen_Char(cChar, X0, Y0)
' 在指定坐标处生成指定字符的位图阵列
CDGen_Reset
Select Case cChar
Case "0"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_Close 0 ' 封闭当前笔与第0笔(0开始)
Case "1"
CDGen_SetDirection -90 ' 逆时针90度(相对于垂直线)
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_MoveToMiddle 0, 50 ' 移动画笔的位置到第0笔(0开始)的50%处
CDGen_SetDirection 90 ' 逆时针90度
CDGen_FowardDraw -1.4 ' 反方向绘制1.4个单位
CDGen_SetDirection 30 ' 逆时针30度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
Case "2"
CDGen_SetDirection 45 ' 顺时针45度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -120 ' 逆时针120度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.6 ' 绘制0.6个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 1.6 ' 绘制1.6个单位
CDGen_SetDirection -135 ' 逆时针135度
CDGen_FowardDraw 1.0 ' 绘制1.0个单位
Case "3"
CDGen_SetDirection -90 ' 逆时针90度(相对于垂直线)
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 135 ' 顺时针135度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -120 ' 逆时针120度
CDGen_FowardDraw 0.6 ' 绘制0.6个单位
CDGen_SetDirection 80 ' 顺时针80度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
Case "4"
CDGen_SetDirection 20 ' 顺时针20度(相对于垂直线)
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -110 ' 逆时针110度
CDGen_FowardDraw 1.2 ' 绘制1.2个单位
CDGen_MoveToMiddle 1, 60 ' 移动画笔的位置到第1笔(0开始)的60%处
CDGen_SetDirection 90 ' 顺时针90度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_MoveCursor 2 ' 移动画笔到第2笔(0开始)的开始处
CDGen_FowardDraw -1.5 ' 反方向绘制1.5个单位
Case "5"
CDGen_SetDirection 90 ' 顺时针90度(相对于垂直线)
CDGen_FowardDraw 1.0 ' 绘制1.0个单位
CDGen_SetDirection -90 ' 逆时针90度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -90 ' 逆时针90度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 30 ' 顺时针30度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 30 ' 顺时针30度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
Case "6"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_CloseToMiddle 2, 50 ' 将当前画笔位置与第2笔(0开始)的50%处封闭
Case "7"
CDGen_SetDirection 180 ' 顺时针180度(相对于垂直线)
CDGen_FowardDraw 0.3 ' 绘制0.3个单位
CDGen_SetDirection 90 ' 顺时针90度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.3 ' 绘制1.3个单位
Case "8"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.8 ' 反方向绘制0.8个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.8 ' 反方向绘制0.8个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 110 ' 顺时针110度
CDGen_FowardDraw -1.5 ' 反方向绘制1.5个单位
CDGen_SetDirection -110 ' 逆时针110度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 70 ' 顺时针70度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_Close 0 ' 封闭当前笔与第0笔(0开始)
Case "9"
CDGen_SetDirection 120 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -1.5 ' 绘制1.5个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_CloseToMiddle 2, 50 ' 将当前画笔位置与第2笔(0开始)的50%处封闭
' 以下为字母的矢量动作，有兴趣的可以继续
Case "A"
CDGen_SetDirection -(Rnd * 20 + 150) ' 逆时针150-170度(相对于垂直线)
CDGen_FowardDraw Rnd * 0.2 + 1.1 ' 绘制1.1-1.3个单位
CDGen_SetDirection Rnd * 20 + 140 ' 顺时针140-160度
CDGen_FowardDraw Rnd * 0.2 + 1.1 ' 绘制1.1-1.3个单位
CDGen_MoveToMiddle 0, 30 ' 移动画笔的位置到第1笔(0开始)的30%处
CDGen_CloseToMiddle 1, 70 ' 将当前画笔位置与第1笔(0开始)的70%处封闭
Case "B"
CDGen_SetDirection -(Rnd * 20 + 50) ' 逆时针50-70度(相对于垂直线)
CDGen_FowardDraw Rnd * 0.4 + 0.8 ' 绘制0.8-1.2个单位
CDGen_SetDirection Rnd * 20 + 110 ' 顺时针110-130度
CDGen_FowardDraw Rnd * 0.2 + 0.6 ' 绘制0.6-0.8个单位
CDGen_SetDirection -(Rnd * 20 + 110) ' 逆时针110-130度
CDGen_FowardDraw Rnd * 0.2 + 0.6 ' 绘制0.6-0.8个单位
CDGen_SetDirection Rnd * 20 + 110 ' 顺时针110-130度
CDGen_FowardDraw Rnd * 0.4 + 0.8 ' 绘制0.8-1.2个单位
CDGen_Close 0 ' 封闭当前笔与第1笔(0开始)
Case "C"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
End Select
CDGen_Flush X0, Y0
End Sub
Sub CDGen_Char(cChar, X0, Y0)
' 在指定坐标处生成指定字符的位图阵列
CDGen_Reset
Select Case cChar
Case "0"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_Close 0 ' 封闭当前笔与第0笔(0开始)
Case "1"
CDGen_SetDirection -90 ' 逆时针90度(相对于垂直线)
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_MoveToMiddle 0, 50 ' 移动画笔的位置到第0笔(0开始)的50%处
CDGen_SetDirection 90 ' 逆时针90度
CDGen_FowardDraw -1.4 ' 反方向绘制1.4个单位
CDGen_SetDirection 30 ' 逆时针30度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
Case "2"
CDGen_SetDirection 45 ' 顺时针45度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -120 ' 逆时针120度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.6 ' 绘制0.6个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 1.6 ' 绘制1.6个单位
CDGen_SetDirection -135 ' 逆时针135度
CDGen_FowardDraw 1.0 ' 绘制1.0个单位
Case "3"
CDGen_SetDirection -90 ' 逆时针90度(相对于垂直线)
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 135 ' 顺时针135度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -120 ' 逆时针120度
CDGen_FowardDraw 0.6 ' 绘制0.6个单位
CDGen_SetDirection 80 ' 顺时针80度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
Case "4"
CDGen_SetDirection 20 ' 顺时针20度(相对于垂直线)
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -110 ' 逆时针110度
CDGen_FowardDraw 1.2 ' 绘制1.2个单位
CDGen_MoveToMiddle 1, 60 ' 移动画笔的位置到第1笔(0开始)的60%处
CDGen_SetDirection 90 ' 顺时针90度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_MoveCursor 2 ' 移动画笔到第2笔(0开始)的开始处
CDGen_FowardDraw -1.5 ' 反方向绘制1.5个单位
Case "5"
CDGen_SetDirection 90 ' 顺时针90度(相对于垂直线)
CDGen_FowardDraw 1.0 ' 绘制1.0个单位
CDGen_SetDirection -90 ' 逆时针90度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection -90 ' 逆时针90度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 30 ' 顺时针30度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.4 ' 绘制0.4个单位
CDGen_SetDirection 30 ' 顺时针30度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
Case "6"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_CloseToMiddle 2, 50 ' 将当前画笔位置与第2笔(0开始)的50%处封闭
Case "7"
CDGen_SetDirection 180 ' 顺时针180度(相对于垂直线)
CDGen_FowardDraw 0.3 ' 绘制0.3个单位
CDGen_SetDirection 90 ' 顺时针90度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.3 ' 绘制1.3个单位
Case "8"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.8 ' 反方向绘制0.8个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.8 ' 反方向绘制0.8个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 110 ' 顺时针110度
CDGen_FowardDraw -1.5 ' 反方向绘制1.5个单位
CDGen_SetDirection -110 ' 逆时针110度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.8 ' 绘制0.8个单位
CDGen_SetDirection 60 ' 顺时针60度
CDGen_FowardDraw 0.9 ' 绘制0.9个单位
CDGen_SetDirection 70 ' 顺时针70度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_Close 0 ' 封闭当前笔与第0笔(0开始)
Case "9"
CDGen_SetDirection 120 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -1.5 ' 绘制1.5个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 顺时针120度
CDGen_FowardDraw 0.5 ' 绘制0.5个单位
CDGen_CloseToMiddle 2, 50 ' 将当前画笔位置与第2笔(0开始)的50%处封闭
' 以下为字母的矢量动作，有兴趣的可以继续
Case "A"
CDGen_SetDirection -(Rnd * 20 + 150) ' 逆时针150-170度(相对于垂直线)
CDGen_FowardDraw Rnd * 0.2 + 1.1 ' 绘制1.1-1.3个单位
CDGen_SetDirection Rnd * 20 + 140 ' 顺时针140-160度
CDGen_FowardDraw Rnd * 0.2 + 1.1 ' 绘制1.1-1.3个单位
CDGen_MoveToMiddle 0, 30 ' 移动画笔的位置到第1笔(0开始)的30%处
CDGen_CloseToMiddle 1, 70 ' 将当前画笔位置与第1笔(0开始)的70%处封闭
Case "B"
CDGen_SetDirection -(Rnd * 20 + 50) ' 逆时针50-70度(相对于垂直线)
CDGen_FowardDraw Rnd * 0.4 + 0.8 ' 绘制0.8-1.2个单位
CDGen_SetDirection Rnd * 20 + 110 ' 顺时针110-130度
CDGen_FowardDraw Rnd * 0.2 + 0.6 ' 绘制0.6-0.8个单位
CDGen_SetDirection -(Rnd * 20 + 110) ' 逆时针110-130度
CDGen_FowardDraw Rnd * 0.2 + 0.6 ' 绘制0.6-0.8个单位
CDGen_SetDirection Rnd * 20 + 110 ' 顺时针110-130度
CDGen_FowardDraw Rnd * 0.4 + 0.8 ' 绘制0.8-1.2个单位
CDGen_Close 0 ' 封闭当前笔与第1笔(0开始)
Case "C"
CDGen_SetDirection -60 ' 逆时针60度(相对于垂直线)
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection -60 ' 逆时针60度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 1.5 ' 绘制1.5个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw -0.7 ' 反方向绘制0.7个单位
CDGen_SetDirection 120 ' 顺时针120度
CDGen_FowardDraw 0.7 ' 绘制0.7个单位
End Select
CDGen_Flush X0, Y0
End Sub
xmrxw 2010-11-12
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我提供一个ASP验证码！
<%
Const nMaxSaturation = 100 ' 最大色彩饱和度
Const nBlankNoisyDotOdds = 0.01 ' 空白处噪点率
Const nColorNoisyDotOdds = 0.05 '有色处噪点率
Const nCharCount = 4 ' 产生的字符个数
Const nPixelWidth = 25 ' 单个字符位图的宽度
Const nPixelHeight = 25 ' 单个字符位图的高度
Const nColorHue = -1 ' 显示验证码的色调(-1表示随机色调, -2表示灰度色调)'220
Const nAngleRandom = 5 ' 角度随机量
Const nLengthRandom = 30 ' 长度随机量(百分比)
Const cCharSet = "0123456789"
' 构成验证码的字符集
' 如果扩充了下边的字母矢量库，则可以相应扩充这个字符集
Dim Buf(), DigtalStr
Dim Lines(), LineCount
Dim CursorX, CursorY, DirX, DirY
Randomize
Call CreatValidCode("GetCode")
Sub CDGen_Reset()
' 复位矢量笔和环境变量
LineCount = 0
CursorX = 0
CursorY = 0
' 初始的光笔方向是垂直向下
DirX = 0
DirY = 1
End Sub
Sub CDGen_Clear()
' 清空位图阵列
Dim i, j
ReDim Buf(nPixelHeight - 1, nCharCount * nPixelWidth - 1)
For j = 0 To nPixelHeight - 1
For i = 0 To nCharCount * nPixelWidth - 1
Buf(j, i) = 0
Next
Next
End Sub
Sub CDGen_PSet(X, Y)
' 在位图阵列上画点
Buf(Y, X) = 1
End Sub
Sub CDGen_Line(X1, Y1, X2, Y2)
' 在位图阵列上画线
Dim DX, DY, DeltaT, i
DX = X2 - X1
DY = Y2 - Y1
If Abs(DX) > Abs(DY) Then DeltaT = Abs(DX) Else DeltaT = Abs(DY)
For i = 0 To DeltaT
CDGen_PSet X1 + DX * i / DeltaT, Y1 + DY * i / DeltaT
Next
End Sub
Sub CDGen_FowardDraw(nLength)
' 按当前光笔方向绘制指定长度并移动光笔，正数表示从左向右/从上向下绘制，负数表示从右向左/从下向上绘制
nLength = Sgn(nLength) * Abs(nLength) * (1 - nLengthRandom / 100 + Rnd * nLenghtRandom * 2 / 100)
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
CursorX = CursorX + DirX * nLength
CursorY = CursorY + DirY * nLength
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_SetDirection(nAngle)
' 按指定角度设定画笔方向, 正数表示相对当前方向顺时针改变方向，负数表示相对当前方向逆时针改变方向
Dim DX, DY
nAngle = Sgn(nAngle) * (Abs(nAngle) - nAngleRandom + Rnd * nAngleRandom * 2) / 180 * 3.1415926
DX = DirX
DY = DirY
DirX = DX * Cos(nAngle) - DY * Sin(nAngle)
DirY = DX * Sin(nAngle) + DY * Cos(nAngle)
End Sub
Sub CDGen_MoveToMiddle(nActionIndex, nPercent)
' 将画笔光标移动到指定动作的中间点上，nPercent为中间位置的百分比
Dim DeltaX, DeltaY
DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex)
DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex)
CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100
CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100
End Sub
Sub CDGen_MoveCursor(nActionIndex)
' 将画笔光标移动到指定动作的起始点上
CursorX = Lines(0, nActionIndex)
CursorY = Lines(1, nActionIndex)
End Sub
Sub CDGen_Close(nActionIndex)
' 将当前光笔位置与指定动作的起始点闭合并移动光笔
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
CursorX = Lines(0, nActionIndex)
CursorY = Lines(1, nActionIndex)
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_CloseToMiddle(nActionIndex, nPercent)
' 将当前光笔位置与指定动作的中间点闭合并移动光笔，nPercent为中间位置的百分比
Dim DeltaX, DeltaY
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex)
DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex)
CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100
CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_Flush(X0, Y0)
' 按照当前的画笔动作序列绘制位图点阵
Dim MaxX, MinX, MaxY, MinY
Dim DeltaX, DeltaY, StepX, StepY, OffsetX, OffsetY
Dim i
MaxX = MinX = MaxY = MinY = 0
For i = 0 To LineCount - 1
If MaxX < Lines(0, i) Then MaxX = Lines(0, i)
If MaxX < Lines(2, i) Then MaxX = Lines(2, i)
If MinX > Lines(0, i) Then MinX = Lines(0, i)
If MinX > Lines(2, i) Then MinX = Lines(2, i)
If MaxY < Lines(1, i) Then MaxY = Lines(1, i)
If MaxY < Lines(3, i) Then MaxY = Lines(3, i)
If MinY > Lines(1, i) Then MinY = Lines(1, i)
If MinY > Lines(3, i) Then MinY = Lines(3, i)
Next
DeltaX = MaxX - MinX
DeltaY = MaxY - MinY
If DeltaX = 0 Then DeltaX = 1
If DeltaY = 0 Then DeltaY = 1
MaxX = MinX
MaxY = MinY
If DeltaX > DeltaY Then
StepX = (nPixelWidth - 2) / DeltaX
StepY = (nPixelHeight - 2) / DeltaX
OffsetX = 0
OffsetY = (DeltaX - DeltaY) / 2
Else
StepX = (nPixelWidth - 2) / DeltaY
StepY = (nPixelHeight - 2) / DeltaY
OffsetX = (DeltaY - DeltaX) / 2
OffsetY = 0
End If
For i = 0 To LineCount - 1
Lines(0, i) = Round((Lines(0, i) - MaxX + OffsetX) * StepX, 0)
If Lines(0, i) < 0 Then Lines(0, i) = 0
If Lines(0, i) >= nPixelWidth - 2 Then Lines(0, i) = nPixelWidth - 3
Lines(1, i) = Round((Lines(1, i) - MaxY + OffsetY) * StepY, 0)
If Lines(1, i) < 0 Then Lines(1, i) = 0
If Lines(1, i) >= nPixelHeight - 2 Then Lines(1, i) = nPixelHeight - 3
Lines(2, i) = Round((Lines(2, i) - MinX + OffsetX) * StepX, 0)
If Lines(2, i) < 0 Then Lines(2, i) = 0
If Lines(2, i) >= nPixelWidth - 2 Then Lines(2, i) = nPixelWidth - 3
Lines(3, i) = Round((Lines(3, i) - MinY + OffsetY) * StepY, 0)
If Lines(3, i) < 0 Then Lines(3, i) = 0
If Lines(3, i) >= nPixelHeight - 2 Then Lines(3, i) = nPixelHeight - 3
CDGen_Line Lines(0, i) + X0 + 1, Lines(1, i) + Y0 + 1, Lines(2, i) + X0 + 1, Lines(3, i) + Y0 + 1
Next
End Sub
<%
Const nMaxSaturation = 100 ' 最大色彩饱和度
Const nBlankNoisyDotOdds = 0.01 ' 空白处噪点率
Const nColorNoisyDotOdds = 0.05 '有色处噪点率
Const nCharCount = 4 ' 产生的字符个数
Const nPixelWidth = 25 ' 单个字符位图的宽度
Const nPixelHeight = 25 ' 单个字符位图的高度
Const nColorHue = -1 ' 显示验证码的色调(-1表示随机色调, -2表示灰度色调)'220
Const nAngleRandom = 5 ' 角度随机量
Const nLengthRandom = 30 ' 长度随机量(百分比)
Const cCharSet = "0123456789"
' 构成验证码的字符集
' 如果扩充了下边的字母矢量库，则可以相应扩充这个字符集
Dim Buf(), DigtalStr
Dim Lines(), LineCount
Dim CursorX, CursorY, DirX, DirY
Randomize
Call CreatValidCode("GetCode")
Sub CDGen_Reset()
' 复位矢量笔和环境变量
LineCount = 0
CursorX = 0
CursorY = 0
' 初始的光笔方向是垂直向下
DirX = 0
DirY = 1
End Sub
Sub CDGen_Clear()
' 清空位图阵列
Dim i, j
ReDim Buf(nPixelHeight - 1, nCharCount * nPixelWidth - 1)
For j = 0 To nPixelHeight - 1
For i = 0 To nCharCount * nPixelWidth - 1
Buf(j, i) = 0
Next
Next
End Sub
Sub CDGen_PSet(X, Y)
' 在位图阵列上画点
Buf(Y, X) = 1
End Sub
Sub CDGen_Line(X1, Y1, X2, Y2)
' 在位图阵列上画线
Dim DX, DY, DeltaT, i
DX = X2 - X1
DY = Y2 - Y1
If Abs(DX) > Abs(DY) Then DeltaT = Abs(DX) Else DeltaT = Abs(DY)
For i = 0 To DeltaT
CDGen_PSet X1 + DX * i / DeltaT, Y1 + DY * i / DeltaT
Next
End Sub
Sub CDGen_FowardDraw(nLength)
' 按当前光笔方向绘制指定长度并移动光笔，正数表示从左向右/从上向下绘制，负数表示从右向左/从下向上绘制
nLength = Sgn(nLength) * Abs(nLength) * (1 - nLengthRandom / 100 + Rnd * nLenghtRandom * 2 / 100)
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
CursorX = CursorX + DirX * nLength
CursorY = CursorY + DirY * nLength
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_SetDirection(nAngle)
' 按指定角度设定画笔方向, 正数表示相对当前方向顺时针改变方向，负数表示相对当前方向逆时针改变方向
Dim DX, DY
nAngle = Sgn(nAngle) * (Abs(nAngle) - nAngleRandom + Rnd * nAngleRandom * 2) / 180 * 3.1415926
DX = DirX
DY = DirY
DirX = DX * Cos(nAngle) - DY * Sin(nAngle)
DirY = DX * Sin(nAngle) + DY * Cos(nAngle)
End Sub
Sub CDGen_MoveToMiddle(nActionIndex, nPercent)
' 将画笔光标移动到指定动作的中间点上，nPercent为中间位置的百分比
Dim DeltaX, DeltaY
DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex)
DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex)
CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100
CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100
End Sub
Sub CDGen_MoveCursor(nActionIndex)
' 将画笔光标移动到指定动作的起始点上
CursorX = Lines(0, nActionIndex)
CursorY = Lines(1, nActionIndex)
End Sub
Sub CDGen_Close(nActionIndex)
' 将当前光笔位置与指定动作的起始点闭合并移动光笔
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
CursorX = Lines(0, nActionIndex)
CursorY = Lines(1, nActionIndex)
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_CloseToMiddle(nActionIndex, nPercent)
' 将当前光笔位置与指定动作的中间点闭合并移动光笔，nPercent为中间位置的百分比
Dim DeltaX, DeltaY
ReDim Preserve Lines(3, LineCount)
Lines(0, LineCount) = CursorX
Lines(1, LineCount) = CursorY
DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex)
DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex)
CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100
CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100
Lines(2, LineCount) = CursorX
Lines(3, LineCount) = CursorY
LineCount = LineCount + 1
End Sub
Sub CDGen_Flush(X0, Y0)
' 按照当前的画笔动作序列绘制位图点阵
Dim MaxX, MinX, MaxY, MinY
Dim DeltaX, DeltaY, StepX, StepY, OffsetX, OffsetY
Dim i
MaxX = MinX = MaxY = MinY = 0
For i = 0 To LineCount - 1
If MaxX < Lines(0, i) Then MaxX = Lines(0, i)
If MaxX < Lines(2, i) Then MaxX = Lines(2, i)
If MinX > Lines(0, i) Then MinX = Lines(0, i)
If MinX > Lines(2, i) Then MinX = Lines(2, i)
If MaxY < Lines(1, i) Then MaxY = Lines(1, i)
If MaxY < Lines(3, i) Then MaxY = Lines(3, i)
If MinY > Lines(1, i) Then MinY = Lines(1, i)
If MinY > Lines(3, i) Then MinY = Lines(3, i)
Next
DeltaX = MaxX - MinX
DeltaY = MaxY - MinY
If DeltaX = 0 Then DeltaX = 1
If DeltaY = 0 Then DeltaY = 1
MaxX = MinX
MaxY = MinY
If DeltaX > DeltaY Then
StepX = (nPixelWidth - 2) / DeltaX
StepY = (nPixelHeight - 2) / DeltaX
OffsetX = 0
OffsetY = (DeltaX - DeltaY) / 2
Else
StepX = (nPixelWidth - 2) / DeltaY
StepY = (nPixelHeight - 2) / DeltaY
OffsetX = (DeltaY - DeltaX) / 2
OffsetY = 0
End If
For i = 0 To LineCount - 1
Lines(0, i) = Round((Lines(0, i) - MaxX + OffsetX) * StepX, 0)
If Lines(0, i) < 0 Then Lines(0, i) = 0
If Lines(0, i) >= nPixelWidth - 2 Then Lines(0, i) = nPixelWidth - 3
Lines(1, i) = Round((Lines(1, i) - MaxY + OffsetY) * StepY, 0)
If Lines(1, i) < 0 Then Lines(1, i) = 0
If Lines(1, i) >= nPixelHeight - 2 Then Lines(1, i) = nPixelHeight - 3
Lines(2, i) = Round((Lines(2, i) - MinX + OffsetX) * StepX, 0)
If Lines(2, i) < 0 Then Lines(2, i) = 0
If Lines(2, i) >= nPixelWidth - 2 Then Lines(2, i) = nPixelWidth - 3
Lines(3, i) = Round((Lines(3, i) - MinY + OffsetY) * StepY, 0)
If Lines(3, i) < 0 Then Lines(3, i) = 0
If Lines(3, i) >= nPixelHeight - 2 Then Lines(3, i) = nPixelHeight - 3
CDGen_Line Lines(0, i) + X0 + 1, Lines(1, i) + Y0 + 1, Lines(2, i) + X0 + 1, Lines(3, i) + Y0 + 1
Next
End Sub
涛涛_2009 2010-11-12
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