Painting Text

LEADTOOLS DigitalPaint provides the following function for painting text:

L_PntApplyText

This function requires:

• a valid paint handle.

• an optional windows device context.

• the bounding rectangle in which to paint the text.

This function will paint text based on the current text properties. To determine the current text properties, call L_PntGetProperty. To set or change the current text properties, call L_PntSetProperty. For more information on the text properties, refer to the PAINTTEXT structure.

Any transformation information should be set, using the L_PntSetTransformation function before calling any text or other painting function. To get the current transformation information, call L_PntGetTransformation.

The following example sets the text properties and paints some text. It assumes the paint handle has been initialized and the window handle is valid:

HDC            hDC ;
PAINTTEXT text ;
RECT          rcText ;
LOGFONTW   lf ; 
HFONT        hFont ;

/* Get device context to draw on */
hDC = GetDC ( hWnd ) ;

/* Set the required text font properties */
lf.lfHeight         = 48 ;
lf.lfWidth          = 0 ;
lf.lfEscapement  = 0 ;
lf.lfOrientation    = 0 ;
lf.lfWeight         = FW_NORMAL ;
lf.lfItalic            = FALSE ;
lf.lfUnderline     = FALSE ;
lf.lfStrikeOut      = FALSE ;
lf.lfCharSet        = ANSI_CHARSET ;
lf.lfOutPrecision   = OUT_DEFAULT_PRECIS ;
lf.lfClipPrecision  = CLIP_DEFAULT_PRECIS ;
lf.lfQuality        = DEFAULT_QUALITY ;
lf.lfPitchAndFamily = FF_DONTCARE ;
lstrcpy(lf.lfFaceName, TEXT("Times New Roman"));

/* Create the desired text font */
hFont = CreateFontIndirect ( &lf ) ;

/* Set the desired text properties */
text.nSize   = sizeof ( PAINTTEXT )  ;
text.dwMask  = PTF_TEXT | PTF_FONT | PTF_TRANSFORMINFO ; 
text.pszText = TEXT("LEAD") ;
text.hFont  = hFont ;
text.TransformInfo.nRotate = 45 ;

/* Set the new text properties */
L_PntSetProperty ( pPaint, PAINT_GROUP_TEXT, &text ) ;

/* Set the target text drawing box coordinates with respect to the DC dimensions */
SetRect ( &rcText, 10, 10, 200, 200 ) ;

/*Use the current text properties and the current transformations properties to draw the text to the DC */
L_PntApplyText ( pPaint, hDC, &rcText ) ;

/* Release the device context */
ReleaseDC ( hWnd, hDC ) ;