Visual C++ Books

Development Platform:

C++ Builder

Unit1.cpp：Code Content

							//---------------------------------------------------------------------------
#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)
{
  int ii,jj,pix,pix1;
  byte cr,cg,cb;
  for(jj=0;jj<Image1->Height;jj++)
    for(ii=0;ii<Image1->Width;ii++)
    {
      pix=Image1->Picture->Bitmap->Canvas->Pixels[ii][jj];
      cr=GetRValue(pix);
      cg=GetGValue(pix);
      cb=GetBValue(pix);
      pix1=0.3*cr+0.6*cg+0.1*cb;
      pix=RGB(pix1,pix1,pix1);
      Image1->Picture->Bitmap->Canvas->Pixels[ii][jj]=(TColor)pix;
    }
}
//---------------------------------------------------------------------------

						