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; * src/font.h (struct font): Comment about use of average_width.

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Eli Zaretskii 2023-09-10 18:31:06 +03:00
parent 459b5f6b6d
commit 3f04efe9e7
1 changed files with 10 additions and 4 deletions
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14
src/font.h
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@ -298,10 +298,16 @@ struct font
SPACE glyph, the value is 0. */
int space_width;
/* Average width of glyphs in the font. If the font itself doesn't
have that information, but has glyphs of ASCII characters, the
value is the average width of those glyphs. Otherwise, the value
is 0. */
/* Average width of glyphs in the font. Should be the average width
of the glyphs of ASCII characters. The value for the default
face's font is used to determine the canonical character width of
the frame (see FRAME_COLUMN_WIDTH). For fonts that are not
fixed-pitch, the font backend should actually calculate the value
from the glyphs of ASCII characters in the range 32..126
inclusively; relying on the average-width attribute recorded in
the font is unreliable in this case, especially in fonts that
support CJK scripts, where many characters are wide. Value can
be zero if the font doesn't have glyphs for ASCII characters. */
int average_width;
/* Ascent and descent of the font (in pixels). */