Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #if !defined(AFX_MEMDC_H__CA1D3541_7235_11D1_ABBA_00A0243D1382__INCLUDED_)
- #define AFX_MEMDC_H__CA1D3541_7235_11D1_ABBA_00A0243D1382__INCLUDED_
- #pragma once
- // MemDC.h : header file
- class CMemDC : public CDC
- {
- public:
- CMemDC(CDC* pDC);
- ~CMemDC();
- CMemDC* operator->() {return this;}
- operator CMemDC*() {return this;}
- private:
- CBitmap m_bitmap;
- CBitmap* m_pOldBitmap;
- CDC* m_pDC;
- CRect m_rect;
- BOOL m_bMemDC;
- };
- #endif
- // MemDC.cpp : implementation of MemDC class
- // This class implements a memory Device Context
- #include "stdafx.h"
- #include "MemDC.h"
- CMemDC::CMemDC(CDC* pDC) : CDC()
- {
- ASSERT(pDC != NULL);
- m_pDC = pDC;
- m_pOldBitmap = NULL;
- #ifndef WCE_NO_PRINTING
- m_bMemDC = !pDC->IsPrinting();
- #else
- m_bMemDC = FALSE;
- #endif
- if (m_bMemDC) // Create a Memory DC
- {
- pDC->GetClipBox(&m_rect);
- CreateCompatibleDC(pDC);
- m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height());
- m_pOldBitmap = SelectObject(&m_bitmap);
- #ifndef _WIN32_WCE
- SetWindowOrg(m_rect.left, m_rect.top);
- #endif
- }
- else // Make a copy of the relevent parts of the current DC for printing
- {
- #ifndef WCE_NO_PRINTING
- m_bPrinting = pDC->m_bPrinting;
- #endif
- m_hDC = pDC->m_hDC;
- m_hAttribDC = pDC->m_hAttribDC;
- }
- }
- // Destructor copies the contents of the mem DC to the original DC
- CMemDC::~CMemDC()
- {
- if (m_bMemDC)
- {
- // Copy the offscreen bitmap onto the screen.
- m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(),
- this, m_rect.left, m_rect.top, SRCCOPY);
- //Swap back the original bitmap.
- SelectObject(m_pOldBitmap);
- }
- else {
- // All we need to do is replace the DC with an illegal value,
- // this keeps us from accidently deleting the handles associated with
- // the CDC that was passed to the constructor.
- m_hDC = m_hAttribDC = NULL;
- }
- }
- LNK2005 "public: virtual __thiscall CMemDC::~CMemDC(void)" (??1CMemDC@@UAE@XZ) already defined in MemDC.obj myProj C:devmyprojnafxcwd.lib(afxglobals.obj)
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement