printing vertical text using ExtTextOut in memory DC

abrahamlincolng

I am using ExtTextOut to print unicode characters in memory DC. We create font using CreateFontIndirect to print characters in different orientations. When we use GB2312_CHARSET (chinese character set) with lfEscapement/orientation set to 270 degrees the characters are printed in reverse order. If the character to be printed is 'Chinese', it is printed as 'esenihc'. The same character set works fine if lfEscapement/orientation is set to 0 deg. The issue is present only in WINCE. The same code works fine in a Win32 application. I have written a sample application.Find below the code from sample app

CSampView::OnDraw (CDC* pDisplayDC)
{

HDC hDC = CreateCompatibleDC(NULL);
HBITMAP hBmp = CreateCompatibleBitmap(hDC, width, height);
BITMAPINFO biBitmapInfo;

// font size may vary if screen resolution changes
biBitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
biBitmapInfo.bmiHeader.biWidth = 500;
biBitmapInfo.bmiHeader.biHeight = 500;
biBitmapInfo.bmiHeader.biPlanes = 1;
biBitmapInfo.bmiHeader.biBitCount = 1 ;
biBitmapInfo.bmiHeader.biCompression = BI_RGB;
biBitmapInfo.bmiHeader.biSizeImage = 0;
biBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
biBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
biBitmapInfo.bmiHeader.biClrUsed = 0;
biBitmapInfo.bmiHeader.biClrImportant = 0;
biBitmapInfo.bmiColors[0].rgbBlue = 0;
biBitmapInfo.bmiColors[0].rgbGreen = 0;
biBitmapInfo.bmiColors[0].rgbRed = 0;
biBitmapInfo.bmiColors[1].rgbBlue =1;
biBitmapInfo.bmiColors[1].rgbGreen = 1;
biBitmapInfo.bmiColors[1].rgbRed = 1;

CDC *pDC = CDC::FromHandle(hDC);
/*TCHAR szString[255] = {0x0043, 0x0068, 0x0069, 0x006E, 0x0065, 0x0073, 0x0065, 0x003A, 0x0020, 0x96C5,
0x864E, 0x641C, 0x661F, 0x575A, 0x51B3, 0x5426, 0x8BA4, 0x80E1, 0x6208, 0x63A5,
0x62CD, 0x96C5, 0x864E, 0x5E7F, 0x544A };*/

wchar_t szString[255] = _T("Print Test");

PUINT8 pui8ImageContent;
// Create rendering canvas
HBITMAP hBmp1 = CreateDIBSection(hDC,
&biBitmapInfo,
DIB_PAL_COLORS,
(void**)&pui8ImageContent,
NULL,
0);

HBITMAP holdObj = (HBITMAP)SelectObject(hDC, hBmp1);
if (NULL == holdObj)
{
AfxMessageBox(L"Bitmap Selection failed");
}
CBitmap* aBMP = CBitmap::FromHandle(hBmp);
BITMAP* abmpDim = NULL;
aBMP->GetBitmap(abmpDim);

memset(pui8ImageContent, 0, m_iOverallSizeInBytes);

LOGFONT SLogFont = {0};
memset(&SLogFont, 0, sizeof(LOGFONT));
SLogFont.lfHeight = 50;
SLogFont.lfWidth = 50;
SLogFont.lfCharSet = GB2312_CHARSET

abrahamlincolng

Have i asked the question in a wrong forum :confused:

Lost User

Nope, this is the correct forum; but your question might be a bit too advanced for most of us. I'd be looking for an alternative by now, like painting the text on a bitmap and rotate that. Did you solve your problem? If yes, how?

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^] They hate us for our freedom![^]

pasztorpisti

I guess this is a bug, its not uncommon. Especially because the win32 (more maintained) sibling works well.