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Old December 23rd, 2004, 02:50 AM
ck ck is offline
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Default How to get bitmap pixel to store in the array

hi,
 i'm a beginner of visual C++, anybody know or can teach me how to get bitmap pixel, read it, write it, then save it, then load & display it on the static control in MFC??? & all tis codes is it write in header file(.h) or source file(.cpp)??? thanks

below is the codes..but dunnno right or wrong...& it got bugs also...

struct Image {
 int rows;
 int colds;
 unsigned char *Data;
 unsigned char Type;
};

#define BASIC 0

#include <stdlib.h>
#include <memory.h>


void ReadArray(Image *Img, const char *filename)
{
    FILE *fl;
    int x;

        fl = fopen(filename, "ra");

    for(x=0; x<Img->rows; ++x)
            fread(Img->Data + x*Img->cols, Img->cols,1,fl);
        fclose(fl);
}

void WriteArray(Image *Img, const char *filename)
{
    FILE *fl;
    int y;

        fl = fopen(filename, "wa");

    for(y=0; y<Img->rows; ++y)
            fwrite(Img->Data + y*Img->cols, Img->cols,1,fl);
        fclose(fl);
}

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ck.
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Old January 20th, 2005, 05:02 PM
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Default

You're working too hard...try
the following from Ronen Magid on www.codeguru.com

1. Create your own CBitmap-derived class (say, CMyBitmap)
2. Add a "load from bitmap" method as listed below

BOOL CMyBitmap::LoadBitmap(LPCTSTR szFilename)
{
  ASSERT(szFilename);
  DeleteObject();

  HBITMAP hBitmap = NULL;
  hBitmap = (HBITMAP)LoadImage(NULL, szFilename, IMAGE_BITMAP, 0, 0,
             LR_LOADFROMFILE | LR_CREATEDIBSECTION | LR_DEFAULTSIZE);
  return Attach(hBitmap);
}

Then do a CStatic::SetBitmap ( hBitmap ).

I noticed that your example code is all done in C, not C++. The above code assumes using MFC and C++. The LoadImage () call is a WinAPI C-function call that returns an HBITMAP handle.
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