关于图元文件一个奇怪的问题。

[louguodong]

程序中向图元文件中用ExtTextOut输出字符，ExtTextOutA可以正常使用，ExtTextOutW就无效了，难以理解。哪位高人给解释下。另外字体输出到图元文件中是不是会走样？相比普通的窗口dc。

#include <windows.h>

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

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow)

{
	static TCHAR szAppName[] = TEXT ("EMF1");
	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, TEXT ("Enhanced MetaFile Demo #1"),
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, CW_USEDEFAULT,
		CW_USEDEFAULT, CW_USEDEFAULT,
		NULL, NULL, hInstance, NULL) ;
	ShowWindow (hwnd, nCmdShow) ;
	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)
{
	static HENHMETAFILE hemf ;
	HDC hdc, hdcEMF;
	PAINTSTRUCT ps;
	RECT rect ;
	switch (message)

	{

	case   WM_CREATE:
		{
			RECT rt;
			rt.bottom = 500;
			rt.top = 0;
			rt.left = 0;
			rt.right = 500;
			hdcEMF = CreateEnhMetaFileA (NULL, NULL, NULL,  NULL) ;
			//ExtTextOutW(hdcEMF, 100, 100, 4096, NULL, L"aaaaa", 5, NULL);
			//这里换成上面的宽字符函数就无效了
			ExtTextOutA(hdcEMF, 100, 100, 4096, NULL, "aaaaa", 5, NULL);
			hemf = CloseEnhMetaFile (hdcEMF) ;
			return 0 ;
		}
	case  WM_PAINT:
		hdc = BeginPaint(hwnd, &ps) ;
		GetClientRect (hwnd, &rect) ;
		rect.left  = rect.right / 4 ;
		rect.right = 3 * rect.right / 4 ;
		rect.top   = rect.bottom / 4 ;
		rect.bottom = 3 * rect.bottom / 4 ;
		PlayEnhMetaFile (hdc, hemf, &rect) ;
		EndPaint (hwnd, &ps) ;
		return 0 ;
	case   WM_DESTROY:
		DeleteEnhMetaFile (hemf) ;
		PostQuitMessage (0) ;
		return 0 ;

	}
	return DefWindowProcW (hwnd, message, wParam, lParam) ;
}

[louguodong]

有高手知道吗？

[schlafenhamster]

// ETO_CLIPPED not ETO_IGNORELANGUAGE=0x1000

	case   WM_CREATE:
		{
			SystemParametersInfo( SPI_GETICONTITLELOGFONT,sizeof(LOGFONT),&lf,0 );
			hFont = CreateFontIndirect( &lf );
#if 0
			hdcEMF = CreateEnhMetaFileA (NULL, NULL, NULL,  NULL) ;
#else
			hdcEMF = CreateEnhMetaFileW (NULL, NULL, NULL,  NULL) ;
#endif
			SelectObject(hdcEMF,hFont);
			SetBkColor(hdcEMF,RGB(200,200,0));
			SetTextColor(hdcEMF,RGB(255,0,0));
#if 0 // ETO_CLIPPED not ETO_IGNORELANGUAGE=0x1000
			ExtTextOutA(hdcEMF, 100, 100, ETO_CLIPPED, NULL, "AAAAA", 5, NULL);
#else
			ExtTextOutW(hdcEMF, 100, 100, ETO_CLIPPED, NULL, L"AAAAA", 5, NULL);
#endif
			hemf = CloseEnhMetaFile (hdcEMF) ;
			return 0 ;
		}

[louguodong]

嗯，应该是这的问题。谢谢！f

[向立天]

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