TrueType Font Widths

Hi, is there any way to get the following BMax example to work in B3D?

http://www.blitzbasic.com/Community/posts.php?topic=47573

my code is not working:

Graphics 640,480,0,2

bank = CreateBank( 256 * 3 * 4 )

hwnd = api_GetActiveWindow()
hdc = api_GetDC( hwnd )

font = LoadFont("Tahoma.ttf",20)
SetFont font

api_GetCharABCWidths( hdc, 0, 255, bank )

For i=0 To 255*3
Text x,y, PeekInt( bank, i)

x = x + 20: If x > 620 Then x = 0: y = y + 20
Next

WaitKey()
End



....my english is very bad, sorry for that....hope anybody can help - thanks.

I think it could have to do with the .decls
I believe that for passing banks, a "%" is required.
But why not use StringWidth() ?

Because i need all the character spacings, A, B and C not only the width "created" by Blitz.

Not sure if you understood b32's hint.

Something like

for i=0 to 255
print stringwidth(chr$(i))
next

Should return the width of each character.

Yes i know that stringwidth() gives me the width of a string but i need also...

...i repeat the MSDN:

"the negative A or C widths for a character, that character includes underhangs or overhangs."

take a look here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/fontext_8icz.asp

Blitz does not use underhangs or overhangs - it simply doesn't draw them. Can be frustrating at times. You'll mostly only notice the clipping when using italics or really fancy fonts. You will need to bypass Blitz "Text"/"Print" commands to have a use for underhangs or overhangs.

I assume you are getting a "User lib function not found" error on this line:
api_GetCharABCWidths( hdc, 0, 255, bank )

No, i get NO ERROR. But i get no results in the bank.

It is not so importend for what kind of thing i need this information but i need it ;)

The point is that it will not work and i don't no why.

Ok. Got it to run now. But like you said, no data. Interesting...

Um... Tahoma doesn't have overhangs/underhangs but that shouldn't make the function return 0's. Hmmm...

[Update] It's not even writing to the bank. Strange...

[Update] I guess (I'm not quite sure how to test) that Blitz doesn't use the fonts the same way that Windows does, so when you call that command (a Windows function) it doesn't think you have a font and therefore returns nothing.

[Update] Confirmed. GetCharABCWidths returns a failure. You'll need to use Windows functions to load a font if you want to use GetCharABCWidths. :(