[Steve Lympany]

Hello,
How can text be drawn at any particular angle?
Steve

[Chan Bok]

The LOGFONT structure has a lfOrientation field:

Code: Select all

typedef struct tagLOGFONT { 
  LONG lfHeight; 
  LONG lfWidth; 
  LONG lfEscapement; 
  LONG lfOrientation; 
  LONG lfWeight; 
  BYTE lfItalic; 
  BYTE lfUnderline; 
  BYTE lfStrikeOut; 
  BYTE lfCharSet; 
  BYTE lfOutPrecision; 
  BYTE lfClipPrecision; 
  BYTE lfQuality; 
  BYTE lfPitchAndFamily; 
  TCHAR lfFaceName[LF_FACESIZE]; 
} LOGFONT, *PLOGFONT; 

Chan Bok
Axon Research

[Kari Rastas]

Addition to Chan Bok's advice

Code: Select all

        FONT = vpi::fontCreate(ff_helvetica,List,FontSize),
        binary::setIndexed_unsigned(Font,2,10*(Angle)), 
        binary::setIndexed_unsigned(Font,3,10*(Angle)),
        .......

[Chan Bok]

Yes, it is the Escapement that determines the rotation.
The Orientation can be set to 0.

[Steve Lympany]

Hi,
Very good, thanks.
I think it would be good to put this in the wiki...
cheers
Steve

[Ferenc Nagy]

OK, I have commented out the stepping with the Orientation variable.
The results were good only by changing the Escapement.
What is the role of the Orientation? Can you give me an example where its value has effect on the drawn text?

Code: Select all

predicates
    onTestTextOrientation : window::menuItemListener.
clauses
    onTestTextOrientation(Task, _MenuTag) :-
        tiled:=tile::new1(Task),
            _=[
               TestWindow
            ||
                std::fromToInStep(0,420,60)=Escapement,
                %std::fromToInStep(0,300,60)=Orientation,
                Orientation=0,
                Title=string::format("Escapement= %3d, orientation = %3d",Escapement,Orientation),
                TestWindow=vpi::winCreate(w_TopLevel,rct(0,0,240,240),Title,noMenu,getTaskWindow(),
                    plainFigure::plain_flags,
                testOrientationHandler,gui_api::mkL(1000*Escapement+Orientation)),
                asserta(drawmode_window(TestWindow))
            ].
 
predicates
    testOrientationHandler:eHandler.
 
clauses
    testOrientationHandler(_, e_Create(_)) = gui_api::rNull /* uncheckedConvert(gui_Native::lResult,0) */ :-
        _Fit=taskWindow::tiled:move(applicationWindow::get()),
        !.
    % Mkr used as recommended in upgrade notes
    testOrientationHandler(H, e_Update(_Update_Rect)) = gui_api::mkR(3) :-
        D=gui_api::getUnsigned(winGetData(H)),
        Escapement=D div 1000,
        Orientation=D mod 100,
        paintObliqueText(H,winGetClientRect(H),winGetText(H),Escapement,Orientation),
        !.
    testOrientationHandler(H,e_CloseRequest())=gui_api::rNull :-
        retractall(drawmode_window(H)),
        winDestroy(H),
        !.
    testOrientationHandler(_Handler, _Event) = gui_api::rNull.

[Thomas Linder Puls]

From the description (LOGFONT structure) it seems that:

• Orientation is for each character, i.e. without changing the "escapement" (which is apparently the direction in which the entire text line points).
• If the graphics mode is GM_COMPATIBLE only the escapement have any effect.

It must be some other predicate/function that changes the graphics mode.

[Ferenc Nagy]

Hi,
SetGraphicsMode function:
http://msdn.microsoft.com/en-us/library ... 85%29.aspx
What is GM_COMPATIBLE and GM_ADVANCED?
How can I set them from VIP?
What are their main differences?