비트맵 - MFC

MFC는 DIB를 지원하지 않는다.

CBitmap

.CreateBitmap()

.LoadBitmap()
.CreateCompatibleBitmap()

CWnd

.GetDesktopWindow()

CDC

.CreateCompatibleDC()
.SelectObject()
.BitBlt()

SRCCOPY|SRCAND|SRCPAINT

CClientDC -> CDC

CWindowDC -> CDC

void CMemDrawView::OnDraw(CDC* pDC)
{
    CBitmap bmpBuffer;
    CDC BufferDC;

    BufferDC.CreateCompatibleDC(pDC);
    bmpBuffer.CreateCompatibleBitmap(pDC, 200, 200);
    CBitmap *pOldBitmap = (CBitmap *)BufferDC.SelectObject(&bmpBuffer);
   
    BufferDC.Rectangle(0, 0, 200, 200);
    BufferDC.Rectangle(10, 10, 100, 100);
    ..
    pDC->BitBlt(0, 0, 200, 200, &BufferDC, 0, 0, SRCCOPY);

    BufferDC.SelectObject(pOldBitmap);
}

저장하기

#include <atlimage.h>

#include <Gdiplusimaging.h>

        //...

        CBitmap bitmap;

        bitmap.CreateBitmap(width, height, 1, 32, rgbData);

        CImage image;

        image.Attach(bitmap);

        image.Save(_T("C:\\test.bmp"), Gdiplus::ImageFormatBMP);

렌더링하기

class CPractice7_2View : public CView
{
...
// Generated message map functions
protected:
    //{{AFX_MSG(CPractice7_2View)
    afx_msg void OnShowBitmap();
    afx_msg void OnMagnifyBitmap();
    afx_msg void OnReduceBitmap();
...
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()

private:
    int m_nBitmapMode;
};

CPractice7_2View::CPractice7_2View()
{
    // TODO: add construction code here
    m_nBitmapMode = 0;
}

void CPractice7_2View::OnDraw(CDC* pDC)
{
    CPractice7_2Doc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    // TODO: add draw code for native data here
    CDC memdc;                 // 메모리의 DC 생성
    memdc.CreateCompatibleDC(pDC);     // 호환성 있는 메모리를 생성

    CBitmap bitmap;        // 비트맵의 인스턴스 생성
    bitmap.LoadBitmap(IDB_CHARACTER);    // 리소스에서 비트맵 읽기

       CBitmap *oldbitmap = memdc.SelectObject(&bitmap);     // 메모리DC에 비트맵을 설정

    switch(m_nBitmapMode) // 비트맵 출력 모드에 따라
    {
     case 1 :
          // 비트맵 출력
                pDC->BitBlt(0, 0, 450, 85, &memdc, 0, 0, SRCCOPY);
          break;
     case 2 :
          // 비트맵 2배 확대 출력
               pDC->StretchBlt(0, 0, 450*2, 85*2, &memdc, 0, 0, 450, 85, SRCCOPY);
               break;
     case 3 :
               // 비트맵 2배 축소 출력
               pDC->StretchBlt(0, 0, 450/2, 85/2, &memdc, 0, 0, 450, 85, SRCCOPY);
                break;
     }
     // DC를 복원
     memdc.SelectObject(oldbitmap);
}

void CPractice7_2View::OnShowBitmap()
{
    // TODO: Add your command handler code here
    m_nBitmapMode = 1;     // 비트맵 출력모드 변경
    Invalidate();         // 화면 갱신
}

void CPractice7_2View::OnMagnifyBitmap()
{
    // TODO: Add your command handler code here
    m_nBitmapMode = 2;    // 비트맵 2배 확대 출력모드 변경
    Invalidate();         // 화면 갱신
}

void CPractice7_2View::OnReduceBitmap()
{
    // TODO: Add your command handler code here
    m_nBitmapMode = 3;     // 비트맵 2배 축소 출력모드 변경
    Invalidate();         // 화면 갱신
}

dib.zip

CDib

.AttachMemory()
.Read()
.SetSystemPalette()
.UsePalette()
.GetDimensions()
.Draw()

#include "cdib.h"

class CEx06dView : public CScrollView
{
    CDib m_dibFile;
    CDib m_dibResource;
protected: // create from serialization only
    CEx06dView();
...
// Generated message map functions
protected:
    //{{AFX_MSG(CEx06dView)
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};


BEGIN_MESSAGE_MAP(CEx06dView, CScrollView)
    //{{AFX_MSG_MAP(CEx06dView)
    ON_WM_LBUTTONDOWN()
    //}}AFX_MSG_MAP
    ...
END_MESSAGE_MAP()
...
void CEx06dView::OnDraw(CDC* pDC)
{
/*    CEx06dDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc); */
    // TODO: add draw code for native data here
    BeginWaitCursor();

    m_dibResource.UsePalette(pDC); // 메시지 핸들러에 있어야 한다.
    m_dibFile.UsePalette(pDC);

    CSize sizeResourceDib = m_dibResource.GetDimensions();
    sizeResourceDib.cx *= 30;
    sizeResourceDib.cy *= -30;
    m_dibResource.Draw(pDC, CPoint(0, -800), sizeResourceDib);

    CSize sizeFileDib = m_dibFile.GetDimensions();
    sizeFileDib.cx *= 30;
    sizeFileDib.cy *= -30;
    m_dibFile.Draw(pDC, CPoint(1800, -800), sizeFileDib);

    EndWaitCursor();
}

void CEx06dView::OnInitialUpdate()
{
    CScrollView::OnInitialUpdate();

    CSize sizeTotal(30000, 40000); // 30x40 cm
//    CSize sizeTotal;
    // TODO: calculate the total size of this view
    CSize sizeLine = CSize(sizeTotal.cx / 100, sizeTotal.cy / 100);
    SetScrollSizes(MM_HIMETRIC, sizeTotal, sizeTotal, sizeLine);
/*
    sizeTotal.cx = sizeTotal.cy = 100;
    SetScrollSizes(MM_TEXT, sizeTotal); */

    LPVOID lpvResource = (LPVOID) ::LoadResource(NULL,
        ::FindResource(NULL, MAKEINTRESOURCE(IDB_REDBLOCKS),
        RT_BITMAP));
    m_dibResource.AttachMemory(lpvResource); // ::LockResource 함수는
                                // 필요하지 않다.
}
...
void CEx06dView::OnLButtonDown(UINT nFlags, CPoint point)
{
    // TODO: Add your message handler code here and/or call default
    CFileDialog dlg(TRUE, "bmp", "*.bmp");
    if (dlg.DoModal() != IDOK) {
        return;
    }

    CFile file;
    file.Open(dlg.GetPathName(), CFile::modeRead);
    if (m_dibFile.Read(&file) == TRUE) {
        Invalidate();
    }

    CClientDC dc(this);
    m_dibFile.SetSystemPalette(&dc);
//    CScrollView::OnLButtonDown(nFlags, point);
}

참조 사이트:

http://msmvps.com/blogs/peterritchie/archive/2006/09/25/Save-CBitmap-to-File.aspx

http://mumbi.net/234?srchid=BR1http%3A%2F%2Fmumbi.net%2F234