加载了bmp图片不显示???在线等。。。

guojinze 2010-05-10 03:22:11

添加了一个类,CGpsView,bmp图片已加载,但就是不显示。。编译运行时可以通过,但有以下的提示:LINK : warning LNK4098: defaultlib "LIBCMT" conflicts with use of other libs; use /NODEFAULTLIB:library

怎么回事???

大家帮帮忙哦。。在线等。。






#include <afx.h> // 注意要加上你所用的类的头文件

#include <stdio.h>
#include <windows.h>

#ifndef _CGPSVIEW__H_
#define _CGPSVIEW__H_


class CGpsView
{

private:
DWORD m_dwDibSize;
unsigned char *m_pDib, *m_pDibBits;
BITMAPINFOHEADER *m_pBIH;
RGBQUAD *m_pPalette;
int m_nPaletteEntries;


public:
CGpsView();
~CGpsView();
public:
BOOL LoadBmp(char *pzFilename); //读取显示图像
BOOL DrawBmp(HDC hdc, int x, int y, int width, int height);
UINT m_width, m_height;




};

#endif




CGpsView::CGpsView()
{
m_pDib = NULL;

}
CGpsView::~CGpsView()
{
if(m_pDib)
{
delete [] m_pDib;
m_pDib = NULL;
}

}
BOOL CGpsView::LoadBmp(char *pzFilename)

{
CFile cf;
if(!cf.Open(pzFilename, CFile::modeRead))
return FALSE;

DWORD dwDibSize;
dwDibSize = cf.GetLength() - sizeof(BITMAPFILEHEADER);

unsigned char *pDib;
pDib = new unsigned char[dwDibSize];
if(pDib == NULL)
return FALSE;

BITMAPFILEHEADER BFH;
// 读取文件头和数据
try
{
if(cf.Read(&BFH, sizeof(BITMAPFILEHEADER))!=sizeof(BITMAPFILEHEADER)||
BFH.bfType!='MB'||
cf.Read(pDib, dwDibSize)!=dwDibSize)
{
delete [] pDib;
pDib = NULL;
return FALSE;
}
}
catch(CFileException *e)
{
e->Delete();
delete [] pDib;
pDib = NULL;
return FALSE;
}

if(m_pDib)
{
delete [] m_pDib;
m_pDib = NULL;
}
m_pDib = pDib;
m_dwDibSize = dwDibSize;


m_pBIH = (BITMAPINFOHEADER*)m_pDib;



// 宽 高
m_width = m_pBIH->biWidth;
m_height = m_pBIH->biHeight;

m_nPaletteEntries = 1 << m_pBIH->biBitCount;
if( m_pBIH->biBitCount > 8 )
m_nPaletteEntries = 0;
else if( m_pBIH->biClrUsed != 0 )
m_nPaletteEntries = m_pBIH->biClrUsed;

// m_pDibBits 地址
m_pDibBits =
&m_pDib[sizeof(BITMAPINFOHEADER)+
m_nPaletteEntries*sizeof(RGBQUAD)];

return TRUE;
}

BOOL CGpsView::DrawBmp(HDC hdc, int x, int y, int width, int height)
{
if(!m_pDib)
return FALSE;
//BitBlt(hdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
StretchDIBits(hdc, x, y, width, height,
0, 0, m_width, m_height, m_pDibBits,
(BITMAPINFO *) m_pBIH, BI_RGB, SRCCOPY);
return TRUE;

}




LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("HelloWin") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow (szAppName, // window class name
TEXT ("The Hello Program"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;


CGpsView cgpsview1;



CString szFileName;
szFileName = "C:\Documents and Settings\Administrator\桌面\bitmap2.bmp";




switch (message)
{
case WM_CREATE:

cgpsview1.LoadBmp((LPTSTR)(LPCTSTR)szFileName);

InvalidateRect(hwnd,NULL,TRUE);

return 0 ;

case WM_PAINT:

//InvalidateRect(hwnd,NULL,TRUE);

hdc=BeginPaint(hwnd,&ps);

cgpsview1.DrawBmp( hdc, 0, 0, 48, 48);

EndPaint(hwnd,&ps);

return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
...全文
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guojinze 2010-05-11
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这个程序已经调试好了;其实,问题很简单。。把cgpsview1.LoadBmp((LPTSTR)(LPCTSTR)szFileName);放到case WM_PAINT:下面就解决了、、、、代码具体如下。。


#include <afx.h> // 注意要加上你所用的类的头文件

#include <stdio.h>
#include <windows.h>

#ifndef _CGPSVIEW__H_
#define _CGPSVIEW__H_

class CGpsView
{

private:
DWORD m_dwDibSize;
unsigned char *m_pDib, *m_pDibBits;
BITMAPINFOHEADER *m_pBIH;
RGBQUAD *m_pPalette;
int m_nPaletteEntries;


public:
CGpsView();
~CGpsView();
public:
BOOL LoadBmp(char *pzFilename); //读取显示图像
BOOL DrawBmp(HDC hdc, int x, int y, int width, int height);
UINT m_width, m_height;

};

#endif


CGpsView::CGpsView()
{
m_pDib = NULL;

}
CGpsView::~CGpsView()
{
if(m_pDib)
{
delete [] m_pDib;
m_pDib = NULL;
}

}
BOOL CGpsView::LoadBmp(char *pzFilename)

{
CFile cf;
if(!cf.Open(pzFilename, CFile::modeRead))
return FALSE;

DWORD dwDibSize;
dwDibSize = cf.GetLength() - sizeof(BITMAPFILEHEADER);

unsigned char *pDib;
pDib = new unsigned char[dwDibSize];
if(pDib == NULL)
return FALSE;

BITMAPFILEHEADER BFH;
try
{
if(cf.Read(&BFH, sizeof(BITMAPFILEHEADER))!=sizeof(BITMAPFILEHEADER)||
BFH.bfType!='MB'||
cf.Read(pDib, dwDibSize)!=dwDibSize)
{
delete [] pDib;
pDib = NULL;
return FALSE;
}
}
catch(CFileException *e)
{
e->Delete();
delete [] pDib;
pDib = NULL;
return FALSE;
}

if(m_pDib)
{
delete [] m_pDib;
m_pDib = NULL;
}
m_pDib = pDib;
m_dwDibSize = dwDibSize;

m_pBIH = (BITMAPINFOHEADER*)m_pDib;
// 宽 高
m_width = m_pBIH->biWidth;
m_height = m_pBIH->biHeight;

m_nPaletteEntries = 1 << m_pBIH->biBitCount;
if( m_pBIH->biBitCount > 8 )
m_nPaletteEntries = 0;
else if( m_pBIH->biClrUsed != 0 )
m_nPaletteEntries = m_pBIH->biClrUsed;

// m_pDibBits 地址
m_pDibBits =
&m_pDib[sizeof(BITMAPINFOHEADER)+
m_nPaletteEntries*sizeof(RGBQUAD)];

return TRUE;
}

BOOL CGpsView::DrawBmp(HDC hdc, int x, int y, int width, int height)
{
if(!m_pDib)
return FALSE;
StretchDIBits(hdc, x, y, width, height,
0, 0, m_width, m_height, m_pDibBits,
(BITMAPINFO *) m_pBIH, BI_RGB, SRCCOPY);
return TRUE;

}



LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("HelloWin") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow (szAppName, // window class name
TEXT ("The Hello Program"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;

CGpsView cgpsview1;


CString szFileName;
szFileName = "C:\\Documents and Settings\\Administrator\\桌面\\1.bmp";




switch (message)
{
case WM_CREATE:

//cgpsview1.LoadBmp((LPTSTR)(LPCTSTR)szFileName);

InvalidateRect(hwnd,NULL,TRUE);

return 0 ;

case WM_PAINT:


hdc=BeginPaint(hwnd,&ps);

cgpsview1.LoadBmp((LPTSTR)(LPCTSTR)szFileName);

cgpsview1.DrawBmp( hdc, 0, 0, 482, 720);

EndPaint(hwnd,&ps);

return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
RHuniSoft 2010-05-10
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可能是你的图片路径里包含有汉字,不能支持。或者是你图片的分辨率太大,再指定的窗口中无法显示,换一个图片或是找一个简单的根目录试试。。。以前我遇到过。。。
_JeffreyWu 2010-05-10
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C:\\Documents and Settings\\Administrator\\桌面\\bitmap2.bmp

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