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三、演示程序
文后的程序完整的演示了上述各种图像的特殊处理效果,
编程需要在From1窗体中安放两个图形框Picture1 及Picture2, 还有五个命令按钮Command1-Command5,之后把下述代码填入相应的事件中, 运行程序后通过按钮1-4即可演示上述的四种图像处理效果, 按"退出"按钮则结束程序。以上方法及程序在WINDOWS95系统、VB4.0环境下调试通过。
’图像平铺显示
Private Sub Command1_Click()
Dim numm As Integer
Picture1.AutoSize = True
roww = Int(Form1.Width / Picture1.Width) + 1
coll = Int(Form1.Height / Picture1.Height) + 1
For i = 0 To roww
For j = 0 To coll
Form1.PaintPicture Picture1.Picture,j*Picture1.Width,i*Picture1.Height,Picture1.Width,Picture1.Height
numm = numm + 1
Form1.Caption = "使用图像个数:" + Str$(numm)
Next j
Next i
Picture1.Visible = 0
End Sub
’随机图像显示
Private Sub Command2_Click()
Picture1.AutoSize = True
Do
xx = Rnd * Picture2.Width
yy = Rnd * Picture2.Height
Picture2.PaintPicture Picture1.Picture, xx, yy,Picture1.Width,Picture1.Height
DoEvents
Loop
End Sub