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Re: TXNDrawXXXTextBox and CGBitmapContext problems...

I would suggest to file an ER so TXNDrawXXXBox takes a flag that enables the
API to take CGCoordinates, I think this is the only way to have what you're
doing work.

X
Le 2/28/02 3:23 PM, Matthew Craig at email@hidden wrote:

> I'm using TXNDrawCFCstringTextBox to do nice static text drawing
> using CGContexts (specified using kTXNUseCGContextRefMask in the options
> parm) and this works well if the CGContext comes from a window. Xavier,
> when helping me with a problem I had been having earlier, suggested that
> he thought that if I was using a CGContext then I'd have to pass in
> CGCoordinates but it turned out that this was not the case - specifying
> the CGContext but using QD coordinates for the input rect works.
>
> Now, the problem I've run into is that sometime I use a CGContext
> created with CGBitmapContextCreate and it seems that, somewhere under
> the hood, TXNDrawCFCstringTextBox is grabbing the current port to use to
> translate the QD coordinates I pass in into CGCoordinates. As you might
> imagine, if the current port does not have the same bounds as my
> CGBitmapContext, then the text appears in the wrong position in y. Is
> this a known bug, or is there a workaround I'm not aware of?
>
> As an example, if I'm trying to draw text into a 100 pixel tall
> CGBitmap at a QuickDraw y of, say 50 but the active window in my app is
> 125 pixels tall, then the text gets drawn into the bitmap at (125 -
> 50) = 75 CG which, back in my bitmap, is equal to 25 QD y. This all
> stems from the fact that TXNDrawCFCstringTextBox wants a QD rect
> regardless if I'm using a CGContext and always tries to convert to CG
> coordinates using the height of the current port. Or at least that is
> what it seems like is happening to me.
>
> Any ideas? Should I file this as a bug?
>
> Thanks,
> -Matt
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References: 
 >TXNDrawXXXTextBox and CGBitmapContext problems... (From: Matthew Craig <email@hidden>)



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