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From: andy@amiga.UUCP (Andy Finkel)
Newsgroups: net.micro.amiga
Subject: Re: OpenFont() and OpenDiskFont() in 1.2 Gamma (possible bug?)
Message-ID: <1594@amiga.amiga.UUCP>
Date: Sat, 1-Nov-86 14:59:27 EST
Article-I.D.: amiga.1594
Posted: Sat Nov  1 14:59:27 1986
Date-Received: Mon, 3-Nov-86 23:56:55 EST
References: <8610311855.AA29341@cory.Berkeley.EDU>
Reply-To: andy@skipper.UUCP (andy finkel)
Organization: Commodore Business Machines, 1200 Wilson Drive, West Chester, PA 19380
Lines: 52

In article <8610311855.AA29341@cory.Berkeley.EDU> dillon@CORY.BERKELEY.EDU (Matt Dillon) writes:
>
>	So, I set up the Text Attribute with the font name and font Ysize,
>set everything else to 0, and call OpenFont().  If it fails I set the
>flags field to FPF_DISKFONT, open the DISKFONT library, and call
>OpenDiskFont().
>
>
>-I open ruby.font w/Ysize = 8,	no problem, it works fine.  The program fails
>on OpenFont() and works with OpenDiskFont().
>
>-I open ruby.font w/Ysize = 12.  OpenFont() does NOT fail.. it gives me the
>ruby.font/8 that I openned earlier.
>
>	Is this a bug with OpenFont() or am I supposed to double check
>fonts returned to me?
>	

>						-Matt

This is actually a feature.  OpenFont (and OpenDiskFont) attempt to give
you the font that is closest to what you asked for.  The first
time you asked for ruby 8, OpenFont checked the system font list.
Finding no ruby fonts of any kind, it immediately fails.

The second time you call it, OpenFont, on checking the system font list,
finds a ruby font.  It then tries to give you the closest size match
(it starts on the size you asked for, then steps down by 2 sizes for
every one it steps up; it other words, if you ask for size 12, sizes
11 and 10 are more acceptable than size 13.  This is why it returns
with ruby 8.  
(OpenDiskFont uses the same algorithm, by the way)

You need to check what font you got on return, because there may be
a more acceptable font on disk.  Keep the order you've got, though
(OpenFont, then OpenDiskFont)...it cuts down on disk accesses.

				andy finkel


-- 

			andy finkel
			Commodore(Amiga)
			{ihnp4|seismo|allegra}!cbmvax!andy
		or	 pyramid!amiga!andy

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