www.pudn.com > J2KLib.rar > Main.cpp

//--------------------------------------------------------------------------- 
 
#include  
#pragma hdrstop 
 
#include "Main.h" 
#include "J2kClass.h" 
#include  
 
//--------------------------------------------------------------------------- 
#pragma package(smart_init) 
#pragma link "CSPIN" 
#pragma resource "*.dfm" 
TForm1 *Form1; 
//--------------------------------------------------------------------------- 
__fastcall TForm1::TForm1(TComponent* Owner) 
        : TForm(Owner) 
{ 
} 
//--------------------------------------------------------------------------- 
void __fastcall TForm1::Button1Click(TObject *Sender) 
{ 
  TMemoryStream *mStm = new TMemoryStream; 
 
  TJPEGImage *jp = new TJPEGImage(); 
  jp->CompressionQuality = CSpinEdit1->Value; 
  try 
  { 
    jp->Assign(Image1->Picture->Bitmap); 
    jp->SaveToStream( mStm );        //多此一举主要是想获得Jpeg图像的大小 
    Label2->Caption = String( "格式：Jpeg 400 X300 ，压缩质量：" ) + jp->CompressionQuality + "，字节：" + mStm->Size + "，压缩比：" + (360054.0/mStm->Size) + "倍"; 
    mStm->Position = 0; 
    jp->LoadFromStream( mStm ); 
    Image2->Picture->Assign(jp); 
  } 
  __finally 
  { 
    delete jp; 
  } 
 
 
 
  TJ2kCoder J2kCoder; 
  double CompressionQuality = CSpinEdit2->Value;; 
  Graphics::TBitmap *Bitmap = new Graphics::TBitmap(); 
 
  mStm->Size = 0; 
  J2kCoder.Encode( Image1->Picture->Bitmap, mStm, CompressionQuality );   //多此一举主要是想获得J2K图像的大小 
  Label3->Caption = String( "格式：J2k 400 X300 ，压缩质量：" ) + CompressionQuality + "，字节：" + mStm->Size + "，压缩比：" + (360054.0/mStm->Size) + "倍"; 
  mStm->Position = 0; 
  try 
  { 
    J2kCoder.Decode( mStm, Bitmap ); 
    mStm->Position = 0; 
    Image3->Picture->Assign(Bitmap); 
  } 
  __finally 
  { 
    delete Bitmap; 
  } 
 
  delete mStm; 
 
} 
//---------------------------------------------------------------------------