tcjpeg.h

Jpeg编解码器的源代码

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

#ifndef TCJPEGH
#define TCJPEGH
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
#include <Dialogs.hpp>
#include <ExtCtrls.hpp>


#include "jpgencoder.h"
#include "bmpencoder.h"
#include "EditableBitmap.h"
#include "imagetype.h"

using namespace Colosseum ;
using namespace std ;
//---------------------------------------------------------------------------
class TCJpeg
{
private:	// User declarations
       EditableBitmapImage image ;
       Colosseum::ImageType image_type ;
       Colosseum::JpegEncoder jpeg_encoder ;
       Colosseum::BmpEncoder bmp_encoder ;
       BITMAPV4HEADER image_header ;
private:
       Colosseum::ImageType GetImageType () { return image_type ; }
       Colosseum::BitmapImage &GetImage () { return image ; }
       void LoadBitmapInfoHeader();
       void ProgressFunction (Colosseum::BitmapImageCoder &coder,
                              void *data,
                              unsigned int currentpass,
                              unsigned int passcount,
                              unsigned int progress,
                              bool &cancel);
public:		// User declarations
       void ReadImage (const String &filename);
       void ShowImage (TImage *Image);
       void SaveImage (const String &filename,int type);
       void SetGammaValue (double value);
       void ToGrayscale();
       void SetAlpha (unsigned int value);
       void SetQuality(unsigned int quality);
       void SetProgressive(bool value) ;//This function enables or disables progressive output
};
//---------------------------------------------------------------------------
#endif