canvasframe.cpp

《Visual C++游戏设计入门》的配套代码

// canvasFrame.cpp : implementation file
//

#include "stdafx.h"
#include "canvasr.h"
#include "canvasFrame.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// canvasFrame

IMPLEMENT_DYNCREATE(canvasFrame, CFrameWnd)

canvasFrame::canvasFrame()
{
	Create(NULL,"绘图窗口");
	CClientDC dc(this);
	int width = dc.GetDeviceCaps(HORZRES);
	int height = dc.GetDeviceCaps(VERTRES);
	GetWindowRect( &rect );
	width = ( width - ( rect.right - rect.left ))/2 ;
	height = (height - (rect.bottom - rect.top ))/2 ;
	MoveWindow( width , height , (rect.right - rect.left ) , (rect.bottom - rect.top ) ,true);
	GetClientRect(&rect); 
	mdc = new CDC;        //建立一内存DC mdc
	bitmap = new CBitmap; //建立源位图
	bgbmp = new CBitmap;  //建立背景图
	mdc->CreateCompatibleDC(&dc); //将mdc转换成与dc相容的DC
	bgbmp->m_hObject = (HBITMAP)::LoadImage(NULL,"bground.bmp",IMAGE_BITMAP,rect.right,rect.bottom,LR_LOADFROMFILE); //载入背景图文件
	bitmap->m_hObject = (HBITMAP)::LoadImage(NULL,"man.bmp",IMAGE_BITMAP,208,154,LR_LOADFROMFILE); //载入来源位图文件
}

canvasFrame::~canvasFrame()
{
	delete mdc;
	delete bitmap; 
	delete bgbmp;
}


BEGIN_MESSAGE_MAP(canvasFrame, CFrameWnd)
	//{{AFX_MSG_MAP(canvasFrame)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// canvasFrame message handlers

void canvasFrame::OnPaint()
{
	CPaintDC dc(this);         //建立响应WM_PAINT消息的DC
	mdc->SelectObject(bgbmp);  //取得背景图
	dc.BitBlt(0,0,rect.right,rect.bottom,mdc,0,0,SRCCOPY); //贴上背景图
	mdc->SelectObject(bitmap); //取得源位图
	dc.BitBlt(250,150,104,154,mdc,104,0,SRCAND); 
	//将屏蔽与背景图做AND运算
	dc.BitBlt(250,150,104,154,mdc,0,0,SRCPAINT);
	//将要透空的图与背景图做OR运算 
}