The following paragraphs describe the CLX functions used to access the attributes of individual font glyphs.
| char-ascent | font index | Function |
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Returns the vertical distance in pixels from the baseline to the top of the given font glyph. Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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| char-attributes | font index | Function |
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Returns font-specific attributes of the given glyph. The interpretation of such attributes is server-dependent. Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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| char-descent | font index | Function |
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Returns the vertical distance in pixels from the baseline to the bottom of the given font glyph. Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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| char-left-bearing | font index | Function |
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Returns the left side bearing of the given font glyph. If draw-glyph is called with horizontal position x, the leftmost pixel of the glyph is drawn at the position (+ x left-bearing). Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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| char-right-bearing | font index | Function |
Returns the right side bearing of the given font glyph. If draw-glyph is called with horizontal position x, the rightmost pixel of the glyph is drawn at the position (+ x rightbearing). Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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| char-width | font index | Function |
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Returns the width of the given font glyph. The width is defined to be equal to (- rightbearing left-bearing). Returns nil if the index is invalid or specifies an empty glyph, or if the font is a pseudo-font.
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