Docs » Autodocs » diskfont.library » OpenDiskFont
OpenDiskFont - load and get a pointer to a disk font.
font = OpenDiskFont(textAttr)
D0 A0
This function finds the font with the specified textAttr on
disk, loads it into memory, and returns a pointer to the font
that can be used in subsequent SetFont and CloseFont calls.
It is important to match this call with a corresponding
CloseFont call for effective management of font memory.
If the font is already in memory, the copy in memory is used.
The disk copy is not reloaded.
textAttr - a TextAttr structure that describes the text font
attributes desired.
D0 is zero if the desired font cannot be found.
As of V36, OpenDiskFont() will automatically attempt to
construct a font for you if:
You have requested a font size which does not exist
as a designed font, and
You have not set the DESIGNED bit in the ta_Flags
field of the TextAttr, or TTextAttr struct.
Constructed fonts are created by scaling a designed font.
A designed font is one which typically resides on disk,
or in ROM (e.g., a font which has been designed by hand
using a drawing tool). Designed fonts generally look better
than fonts constructed by the font scaler, but designed
fonts also require disk space for each font size.
Always set the DESIGNED bit if you do not want constructed fonts,
or use AvailFonts() to find out which font sizes already exist.
As of V37 the diskfont.library supported built-in outline
fonts. Then in V38 the outline font engine was moved to
a new library, "bullet.library."
This routine will not work well with font names whose file
name components are longer than the maximum allowed
(30 characters).
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