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//-------------------------------源文件----------------------------------------------------------------
// 别给我框框Dlg.cpp : implementation file
/*
[学VC、编游戏]
编著、程序设计：唐明理 2004.7
E-mail: cqtml@163.com
*/
#include "stdafx.h"
#include "别给我框框.h"
#include "别给我框框Dlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
HBITMAP bit;
HDC MemDC;
HDC DCBak;
int w,h;
CString dir;
CString cc;
char appdir[256];
CRect rect;
int js;
int fw;
int m0;
int m1;
int p;
BOOL getpic(CString cc,int p);
BOOL loadbmp(CString cc);
void TransparentBlt2( HDC hdc0,
int nX0,int nY0,
int nW0,int nH0,
HDC hdc1,
int nX1,int nY1,
int nW1,int nH1,
UINT Tcol
);
/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialog
CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMyDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMyDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMyDlg: oDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMyDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
//{{AFX_MSG_MAP(CMyDlg)
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_WM_TIMER()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers
BOOL CMyDlg::OnInitDialog()
{
CDialog::OnInitDialog();
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
cc="\r\n 这是《学VC、编游戏》的第三个示例：\r\n\r\n";
cc+=" 在这一章我们使用了以下知识、技术\r\n\r\n";
cc+="1、 逻辑与运算 0*0=0;0*1=0;1*0=0;1*1=1。 \r\n";
cc+=" 见0为0; 全1为1。0乘任何数都是0，1乘任何数都不变。\r\n";
cc+="2、 逻辑或运算 0+0=0;0+1=1;1+0=1;1+1=1。 \r\n";
cc+=" 见1为1; 全0为0。0加任何数都不变，1加任何数都是1。\r\n";
cc+="3、 学习利用位图拷贝BitBlt()的逻辑运算生成透明位图的方法。\r\n";
cc+="4、 介绍刷屏和一个最简单的刷屏方法。\r\n";
cc+="5、 介绍了VC的编译模式的设置方法。\r\n\r\n";
cc+="重点：透明位图的原理和生成方法。\r\n\r\n";
cc+="编著、程序设计：唐明理 2004.7\r\n";
cc+="E-mail: cqtml@163.com\r\n";
SetDlgItemText(IDC_EDIT1,cc);
MoveWindow(0,0,640,480);
CenterWindow();
GetDlgItem(IDOK)->MoveWindow(640-60,0,55,18,TRUE);
MemDC =CreateCompatibleDC(0);
DCBak =CreateCompatibleDC(0);
js=0;
fw=0;
m0=js*400+fw*4;
m1=(js+1)*400-1;
p=m0;
GetCurrentDirectory(256,appdir);
dir=appdir;
if(dir.Right(8)=="运行程序")
dir="图片/";
else
dir="../运行程序/图片/";
loadbmp(dir+"地面.BMP");
SelectObject(DCBak,bit);
SetBkMode(DCBak,TRANSPARENT);
SetTextColor(DCBak,RGB(255,255,255));
cc="这才对嘛,把我捆起梆起做啥。";
TextOut(DCBak,150,260,cc,lstrlen(cc));
cc="对象的显示采用了透明显示方法，对象和底图自然地融合在一起了";
TextOut(DCBak,50,300,cc,lstrlen(cc));
return TRUE; // return TRUE unless you set the focus to a control
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CMyDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}
HCURSOR CMyDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CMyDlg::OnOK()
{ GetDlgItem(IDC_EDIT1)->ShowWindow(SW_HIDE);
CClientDC dc(this);
GetWindowRect(rect);
BitBlt(dc.m_hDC,0,0,rect.Width(),rect.Height(),DCBak,0,0,SRCCOPY);
SetTimer(1,150,NULL);
}
void CMyDlg::OnCancel()
{ DeleteDC(MemDC);
DeleteObject(bit);
DeleteDC(DCBak);
CDialog::OnCancel();
}
void CMyDlg::OnTimer(UINT nIDEvent)
{ CClientDC dc(this);
int x=200,y=200;
BitBlt(dc.m_hDC,x,y,100,100,DCBak,x,y,SRCCOPY);
if(getpic("人",p)==FALSE)
{AfxMessageBox(cc+"没找到!");return;}
SelectObject(MemDC,bit);
TransparentBlt2(dc.m_hDC,x,y,w,h,MemDC,0,0,w,h,RGB(255,255,255));
p++;
if(p>m1) p=m0;
CDialog::OnTimer(nIDEvent);
}
BOOL getpic(CString cc,int p)
{ char name[256];
SetCurrentDirectory(appdir);
sprintf(name,"%s%s/c%05d.bmp",dir,cc,p);
loadbmp(name);
return TRUE;
}
BOOL loadbmp(CString cc)
{ DeleteObject(bit);
bit=(HBITMAP)LoadImage
(AfxGetInstanceHandle(),
cc,
IMAGE_BITMAP,
0,
0,
LR_LOADFROMFILE|LR_CREATEDIBSECTION
);
if(bit==NULL) return FALSE;
DIBSECTION ds;
BITMAPINFOHEADER &bm = ds.dsBmih;
GetObject(bit,sizeof(ds),&ds);
w = bm.biWidth;
h = bm.biHeight;
return TRUE;
}
void TransparentBlt2( HDC hdc0,
int nX0,int nY0,
int nW0,int nH0,
HDC hdc1,
int nX1,int nY1,
int nW1,int nH1,
UINT Tcol
)
{ HBITMAP hBMP =CreateCompatibleBitmap(hdc0,nW0, nH0);
HBITMAP mBMP =CreateBitmap(nW0,nH0,1,1,NULL);
HDC hDC =CreateCompatibleDC(hdc0);
HDC mDC =CreateCompatibleDC(hdc0);
HBITMAP oldBMP =(HBITMAP)SelectObject(hDC, hBMP);
HBITMAP oldmBMP=(HBITMAP)SelectObject(mDC, mBMP);
if (nW0==nW1&&nH0==nH1)
BitBlt(hDC,0,0,nW0,nH0,hdc1,nX1,nY1,SRCCOPY);
else
StretchBlt(hDC,0,0,nW0,nH0,hdc1,nX1,nY1,nW1,nH1,SRCCOPY);
SetBkColor(hDC, Tcol);
BitBlt(mDC,0,0,nW0,nH0,hDC,0,0,SRCCOPY);
SetBkColor(hDC, RGB(0,0,0));
SetTextColor(hDC, RGB(255,255,255));
BitBlt(hDC,0,0,nW0,nH0,mDC,0,0,SRCAND);
SetBkColor(hdc0,RGB(255,255,255));
SetTextColor(hdc0,RGB(0,0,0));
BitBlt(hdc0,nX0,nY0,nW0,nH0,mDC,0,0,SRCAND);
BitBlt(hdc0,nX0,nY0,nW0,nH0,hDC,0,0,SRCPAINT);
SelectObject(hDC, oldBMP);
DeleteDC(hDC);
SelectObject(mDC, oldmBMP);
DeleteDC(mDC);
DeleteObject(hBMP);
DeleteObject(mBMP);
}
//---------------------------------------------------------------------------------------------------------------
问：
TransparentBlt2函数中有以下语句：
SetBkColor(hDC, Tcol);
BitBlt(mDC,0,0,nW0,nH0,hDC,0,0,SRCCOPY);
SetBkColor(hDC, RGB(0,0,0));
SetTextColor(hDC, RGB(255,255,255));
BitBlt(hDC,0,0,nW0,nH0,mDC,0,0,SRCAND);
SetBkColor(hdc0,RGB(255,255,255));
SetTextColor(hdc0,RGB(0,0,0));
书上说着是做掩码图用的，但是SetTextColor函数在这里有什么作用？不是设置文字颜色的吗？ |
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发表于 2004-12-4 12:39:00