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Unit1.cpp：源码内容
							//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  TRect rc;
  rc.Left=0;
  rc.Right=Image1->Width;
  rc.Top=0;
  rc.Bottom=Image1->Height;
  Image1->Canvas->CopyMode=cmSrcPaint;
  Image1->Canvas->CopyRect(rc,Image2->Canvas,rc);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  TRect rc;
  Image3->Width=Image1->Width;
  Image3->Height=Image1->Height;
  rc.Left=0;
  rc.Right=Image1->Width;
  rc.Top=0;
  rc.Bottom=Image1->Height;
  Image3->Canvas->CopyMode=cmSrcCopy;
  Image3->Canvas->CopyRect(rc,Image1->Canvas,rc);
  Image1->Canvas->Brush->Color=clWhite;
  Image1->Canvas->FillRect(rc);
  ID=0;
  Timer1->Enabled=True;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PaintBlocks(int xbg,int ybg)
{
  TRect rc;
  int CurX,CurY,xnn,ynn;
  xnn=Image1->Width/10+1;
  ynn=Image1->Height/10+1;
  for(CurX=xbg;CurX<xnn;CurX+=2)
    for(CurY=ybg;CurY<ynn;CurY+=2)
    {
      rc.Left=CurX*10;
      rc.Right=rc.Left+10;
      rc.Top=CurY*10;
      rc.Bottom=rc.Top+10;
      Image1->Canvas->CopyMode=cmSrcCopy;
      Image1->Canvas->CopyRect(rc,Image3->Canvas,rc);
    }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  if(ID==0)
  {
    PaintBlocks(0,0);
  }
  else if(ID==1)
  {
    PaintBlocks(1,1);
  }
  else if(ID==2)
  {
    PaintBlocks(1,0);
  }
  else
  {
    PaintBlocks(0,1);
    Timer1->Enabled=False;
  }
  ID++;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button3Click(TObject *Sender)
{
  TRect rc;
  rc.Left=0;
  rc.Right=Image1->Width;
  rc.Top=0;
  rc.Bottom=Image1->Height;
  Image1->Canvas->CopyMode=cmSrcPaint;
  Image1->Canvas->CopyRect(rc,Image2->Canvas,rc);
  Image4->Canvas->CopyMode=cmMergePaint;
  Image4->Canvas->CopyRect(rc,Image2->Canvas,rc);
  Image1->Canvas->CopyMode=cmSrcAnd;
  Image1->Canvas->CopyRect(rc,Image4->Canvas,rc);
}
//---------------------------------------------------------------------------

						