unit1.cpp

C++Builder高级应用开发指南随书源码

//---------------------------------------------------------------------------

#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::Button2Click(TObject *Sender)
{
   Byte *ptr;
   int i,x,y;
   Graphics::TBitmap* pb=new Graphics::TBitmap;
   try
   {
      pb->LoadFromFile(".\\Forest.bmp");
      pb->PixelFormat=pf24bit;
      for(i=0;i<256;i++)
      {
         for(y=0;y<pb->Height;y++)
         {
             ptr=(Byte *)pb->ScanLine[y];
             for(x=0;x<pb->Width*3;x++)
             {
                if(ptr[x]>0) ptr[x]=Byte(ptr[x]-1);
             }
             Application->ProcessMessages();
         }
         Image1->Canvas->Draw(0,0,pb);
      }
   }
   catch(...)
   {
      delete pb;
      Close();
   }
   delete pb;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
   Byte *ptr1;
   Byte *ptr2;
   int i,x,y;
   Graphics::TBitmap* pb1=new Graphics::TBitmap;
   Graphics::TBitmap* pb2=new Graphics::TBitmap;
   try
   {
      pb1->LoadFromFile(".\\Forest.bmp");
      pb2->LoadFromFile(".\\Forest.bmp");
      pb1->PixelFormat=pf24bit;
      pb2->PixelFormat=pf24bit;

      for(y=0;y<pb2->Height;y++)
      {
        ptr2=(Byte *)pb2->ScanLine[y];
        for(x=0;x<pb2->Width*3;x++)
        {
           ptr2[x]=0;
        }
      }
      for(i=0;i<256;i++)
      {
         for(y=0;y<pb2->Height;y++)
         {
             ptr1=(Byte *)pb1->ScanLine[y];
             ptr2=(Byte *)pb2->ScanLine[y];
             for(x=0;x<pb2->Width*3;x++)
             {
                if(ptr2[x]<ptr1[x]) ptr2[x]=Byte(ptr2[x]+1);
             }
             Application->ProcessMessages();
         }
         Image1->Canvas->Draw(0,0,pb2);
      }
   }
   catch(...)
   {
      delete pb1;
      delete pb2;
      Close();
   }
   delete pb1;
   delete pb2;
}
//---------------------------------------------------------------------------