#ifndef JDECAPP_HPP_
#define JDECAPP_HPP_

#include "classes.hpp"
#include "fstream.hpp"
#include "jdecoder.hpp"
#include "pixels.hpp"




///////////////////////////////////////////////////////////////////////////////
class JDecForm : public MainForm {
  Pixels pix_;

protected:

  //! coerrided
  void doPaint( PAINTSTRUCT *ps ) {
    if (! pix_.pixels) return;

    BITMAPINFOHEADER bmi = {
      sizeof( BITMAPINFOHEADER ),
      pix_.getWidth(),
      pix_.getHeight(),
      1,  // WORD biPlanes
      pix_.getDepth(),
      BI_RGB,
      0, // DWORD biSizeImage
      0, // LONG biXPelsPerMeter
      0, // LONG biYPelsPerMeter
      0, // DWORD biClrUsed
      0  // DWORD biClrImportant
    };

    int r = ::SetDIBitsToDevice (
      ps->hdc,
      0,
      0,
      pix_.getWidth(),
      pix_.getHeight(),
      0,
      0,
      0,
      pix_.getHeight(),
      pix_.pixels,
      (CONST BITMAPINFO *)&bmi,
      DIB_RGB_COLORS
    );

    if (r == 0) {
      static char buf[256];
      printf( "SetDIBitsToDevice error %d\n", ::GetLastError() );
      setCaption( buf ); //MessageBox( windowHandle, buf, "error", 0 );
    }

  }


  //! overrided
  void doDropFiles( HDROP hDrop ) {
    static char cap[256];
    unsigned char *image = 0;
    char filename[256];
    ::DragQueryFile( hDrop, 0, filename, 255 );

    try {
      unsigned char *line_ptr;
      int line_size;
      FileInputStream fis( filename );
      JPEG::Decoder jpeg( &fis );

      sprintf( cap, "展開中 %d x %d, %d bit(s)", jpeg.getWidth(), jpeg.getHeight(), jpeg.getDepth() );
      setCaption( cap) ;

      pix_.setSize( jpeg.getWidth(), jpeg.getHeight() );

      line_size = pix_.getBPL();
      if (jpeg.getBPL() < line_size) line_size = jpeg.getBPL();

      int y = 0;

      while ( (y = jpeg.getScanLine( (void**)&line_ptr )) >= 0 ) {

        if (pix_.scanPixel( y ))
          memcpy( pix_.scanPixel( y ), line_ptr, line_size );

        if (((y + 1) & 0xf) == 0)
          update();
      }

      sprintf( cap, "%d x %d, %d bit(s)", jpeg.getWidth(), jpeg.getHeight(), jpeg.getDepth() );

    } catch(const char *e) {
      strcpy( cap, "エラー" );
      puts( e );

    } catch(...) {
      strcpy( cap, "エラー" );
      puts( "exception!" );

    }

    setCaption( cap );

    update();

    ::DragFinish( hDrop );
  }

public:

  bool create( int x, int y, int w, int h ) {
    if (MainForm::create( x, y, w, h )) {
      ::DragAcceptFiles( windowHandle, TRUE );
      return true;
    }
    return false;
  }

};



///////////////////////////////////////////////////////////////////////////////
class JDecApplication : public Application {
protected:

  bool initialize( LPSTR cline, int showCmd ) {
    mainForm = new JDecForm();
    if (! mainForm->create( 10, 10, 400, 300 ))
      return false;
    mainForm->show( showCmd );
    return true;
  }

public:
  JDecForm *mainForm;

  JDecApplication() {
    mainForm = 0;
  }

  ~JDecApplication() {
    delete mainForm;
  }

};


// main.cpp からの include 以外は全て extern 宣言する -> インスタンスは一つのみ
#ifndef MAIN_CPP_
extern
#endif
JDecApplication application;


#endif // JDECAPP_APP_