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Chapter 4 - Font Manager / Font Manager Reference

The Font Family ('FOND') Resource

The Family Glyph-Width Table

The font family glyph-width table is used to specify glyph widths for the font family on a per-style basis. This table, which is shown in Figure 4-27, can contain a number of glyph-width subtables, with one subtable for each style in the family.

Figure 4-27 The font family glyph-width table

The family glyph-width table consists of an integer count and a variable number of glyph-width subtables. The table is represented by the WidTable data type, which is shown on page 4-44.

• Number of entries. An integer value that specifies the number of bounding-box entries in this table minus 1. This value is represented by the numWidths field in the WidTable data type.

Each glyph-width subtable in the table is represented by the WidEntry data type, which is shown on page 4-44. Each subtable consists of the following elements.

• Style code. An integer value that specifies the style code for this bounding-box entry. Style codes are shown in Figure 4-23 on page 4-89. This value is represented by the widStyle field in the WidEntry data type.
• Style widths. A variable length array of integer values, with one entry in the array for each glyph in the font. Each width is in 16-bit fixed-point format, with the integer part in the high-order 4 bits and the fractional part in the low-order 12 bits.