memdc.cpp

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// 用于位图显示的CDC继承类

#include "StdAfx.h"
#include "Global.h"
#include "Faction.h"
#include "MemDC.h"

////////////////////
//CMemDC

//class CMemDC : public CDC
CMemDC::CMemDC(CDC* pDC,int width,int height,BOOL bInitBack,COLORREF rgbBack)
{
	if(!CreateCompatibleDC(pDC))
		AfxThrowResourceException();
	if(!m_bmp.CreateCompatibleBitmap(pDC,width,height))
		AfxThrowResourceException();
	pOldBmp = SelectObject(&m_bmp);
	CBrush br(bInitBack ? rgbBack : G.m_rgbBackground);
	CBrush* pOldBrush = SelectObject(&br);
	PatBlt(0,0,width,height,PATCOPY);
	SelectObject(pOldBrush);
	SetBkColor(G.m_rgbBackground);
}

CMemDC::~CMemDC()
{
	SelectObject(pOldBmp);
}