NAME OpenDiskFont - load and get a pointer to a disk font. SYNOPSIS font = OpenDiskFont(textAttr) D0 A0 FUNCTION 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. INPUTS textAttr - a TextAttr structure that describes the text font attributes desired. RESULTS D0 is zero if the desired font cannot be found. NOTES 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." BUGS 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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