이미지 렌더링하기 - CxImage

CxImage

.Load()
.CreateFromHANDLE()
.CopyToHandle()
.Save()
.Draw()
.GetWidth()
.GetHeight()

::FindType()

// Stdafx.h
#include "xImage.h"


class CImageApp : public CWinApp
{
public:
    CImageApp();

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CImageApp)
    public:
    virtual BOOL InitInstance();
    //}}AFX_VIRTUAL

// Implementation
    //{{AFX_MSG(CImageApp)
    ...
    afx_msg void OnFileOpen();
    afx_msg void OnUpdateEditPaste(CCmdUI* pCmdUI);
    afx_msg void OnEditPaste();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};


BEGIN_MESSAGE_MAP(CImageApp, CWinApp)
    //{{AFX_MSG_MAP(CImageApp)
    ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
    ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
    ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
   ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
    //}}AFX_MSG_MAP
    ...
END_MESSAGE_MAP()
...
void CImageApp::OnFileOpen()
{
    // TODO: Add your command handler code here
    char szFilter[] = "Image (*.bmp,*.jpg, *.gif, *.png, *.tif, *.mng, *.ico, *.pcx, \
*.tga, *.wmf, *.jbg, *.j2k)| \
        *.bmp;*.jpg;*.gif;*.png;*.tif;*.mng;*.ico;*.pcx;\
        *.tga;*.wmf;*.jbg;*.j2k|All Files(*.*)|*.*||";

    CFileDialog fileDlg(TRUE, NULL, NULL, OFN_HIDEREADONLY, szFilter);
    if(IDOK == fileDlg.DoModal())
    {
        OpenDocumentFile(fileDlg.GetPathName());
    }   
}

void CImageApp::OnUpdateEditPaste(CCmdUI* pCmdUI)
{
    // TODO: Add your command update UI handler code here
    if(!IsClipboardFormatAvailable(CF_DIB)) pCmdUI->Enable(FALSE);   
}

void CImageApp::OnEditPaste()
{
    // TODO: Add your command handler code here
    // ImageDoc의 DocTemplate을 얻음
    POSITION pos = GetFirstDocTemplatePosition();
    CDocTemplate *pTemplate = GetNextDocTemplate(pos);

    // 새로운 도큐먼트 생성
    CImageDoc *pNewDoc = (CImageDoc*)pTemplate->OpenDocumentFile(NULL);
    if (pNewDoc)   
    {
        HANDLE hBitmap=NULL;

        // 클립보드에서 데이터 가져오기
        if (::OpenClipboard(AfxGetMainWnd()->GetSafeHwnd()))
            hBitmap = ::GetClipboardData(CF_DIB);

        if (hBitmap){
            // 클립보드에서 얻은 데이터로부터 CxImage 생성
            pNewDoc->m_pImage = new CxImage();
            pNewDoc->m_pImage->CreateFromHANDLE(hBitmap);
           
            // View 초기화
            POSITION pos = pNewDoc->GetFirstViewPosition();
            CImageView* pView = (CImageView*)pNewDoc->GetNextView(pos);
        }

        // 클립보드 닫기
        ::CloseClipboard();

        pNewDoc->SetModifiedFlag();
    }
}


class CImageDoc : public CDocument
{
...
// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CImageDoc)
    public:
    ...
    virtual BOOL OnOpenDocument(LPCTSTR lpszPathName);
    virtual void DeleteContents();
    virtual BOOL OnSaveDocument(LPCTSTR lpszPathName);
    //}}AFX_VIRTUAL

// Implementation
public:
    CxImage *m_pImage;
    virtual ~CImageDoc();
...
// Generated message map functions
protected:
    //{{AFX_MSG(CImageDoc)
    afx_msg void OnEditCopy();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};


BEGIN_MESSAGE_MAP(CImageDoc, CDocument)
    //{{AFX_MSG_MAP(CImageDoc)
    ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()
...
CImageDoc::CImageDoc()
{
    // TODO: add one-time construction code here
    m_pImage = NULL;
}
...
BOOL CImageDoc::OnOpenDocument(LPCTSTR lpszPathName)
{
    if (!CDocument::OnOpenDocument(lpszPathName))
        return FALSE;
   
    // TODO: Add your specialized creation code here
// {
    m_pImage = new CxImage;
    m_pImage->Load(lpszPathName, CxImage::FindType(lpszPathName));
// }
    return TRUE;
}

void CImageDoc::DeleteContents()
{
    // TODO: Add your specialized code here and/or call the base class
// {
    if(m_pImage)
        delete m_pImage;
// }
    CDocument::DeleteContents();
}

BOOL CImageDoc::OnSaveDocument(LPCTSTR lpszPathName)
{
    // TODO: Add your specialized code here and/or call the base class
// {
    return m_pImage->Save(lpszPathName, CxImage::FindType(lpszPathName));
// }
//    return CDocument::OnSaveDocument(lpszPathName);
}

void CImageDoc::OnEditCopy()
{
    // TODO: Add your command handler code here
    HANDLE hDIB = m_pImage->CopyToHandle();

    if (::OpenClipboard(AfxGetMainWnd()->GetSafeHwnd())) {
        if(::EmptyClipboard()) {
            if (::SetClipboardData(CF_DIB, hDIB) == NULL ) {
                AfxMessageBox( "Unable to set Clipboard data" );
            }
        }
    }
    ::CloseClipboard();   
}


class CImageView : public CView
{
...
// Generated message map functions
protected:
    //{{AFX_MSG(CImageView)
    afx_msg void OnViewOriginalsize();
    afx_msg void OnViewZoomIn();
    afx_msg void OnViewZoomOut();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()

private:
    int m_nZoom;
};


BEGIN_MESSAGE_MAP(CImageView, CScrollView)
    //{{AFX_MSG_MAP(CImageView)
    ON_COMMAND(ID_VIEW_ORIGINALSIZE, OnViewOriginalsize)
    ON_COMMAND(ID_VIEW_ZOOM_IN, OnViewZoomIn)
    ON_COMMAND(ID_VIEW_ZOOM_OUT, OnViewZoomOut)
    //}}AFX_MSG_MAP
    ...
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CImageView construction/destruction

CImageView::CImageView()
{
    // TODO: add construction code here
    m_nZoom = 1;
}
...
void CImageView::OnDraw(CDC* pDC)
{
    CImageDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    // TODO: add draw code for native data here
    if(pDoc->m_pImage)
    {
        pDC->SetStretchBltMode(COLORONCOLOR);
        if(m_nZoom >= 1)
        {
            pDoc->m_pImage->Draw(pDC->GetSafeHdc(), CRect(0, 0,
                (int)(pDoc->m_pImage->GetWidth()*m_nZoom),
                (int)(pDoc->m_pImage->GetHeight())*m_nZoom));
        }
        else
        {
            pDoc->m_pImage->Draw(pDC->GetSafeHdc(), CRect(0, 0,
                (int)(pDoc->m_pImage->GetWidth()/(2-m_nZoom)),
                (int)(pDoc->m_pImage->GetHeight())/(2-m_nZoom)));
        }
    }
}
...
void CImageView::OnViewOriginalsize()
{
    // TODO: Add your command handler code here
    m_nZoom=1;
    Invalidate();
}

void CImageView::OnViewZoomIn()
{
    // TODO: Add your command handler code here
    m_nZoom++;
    Invalidate();
}

void CImageView::OnViewZoomOut()
{
    // TODO: Add your command handler code here
    m_nZoom--;
    Invalidate();
}