The Maximum Profile Table

maxp - Maximum Profile

This table establishes the memory requirements for this font. All data is required for a font with TrueType outlines. Fonts with CFF data must only fill the numGlyphs field. This is necessary because the 'maxp' table is not only used by the TrueType rasterizer, but also by a number of applications which call the Windows GetFontData( ) API on the 'maxp' table to determine the number of glyphs in the font.

Type	Name	Description
Fixed	Table version number	0x00010000 for version 1.0.
USHORT	numGlyphs	The number of glyphs in the font.
USHORT	maxPoints	Maximum points in a non-composite glyph.
USHORT	maxContours	Maximum contours in a non-composite glyph.
USHORT	maxCompositePoints	Maximum points in a composite glyph.
USHORT	maxCompositeContours	Maximum contours in a composite glyph.
USHORT	maxZones	1 if instructions do not use the twilight zone (Z0), or 2 if instructions do use Z0; should be set to 2 in most cases.
USHORT	maxTwilightPoints	Maximum points used in Z0.
USHORT	maxStorage	Number of Storage Area locations.
USHORT	maxFunctionDefs	Number of FDEFs.
USHORT	maxInstructionDefs	Number of IDEFs.
USHORT	maxStackElements	Maximum stack depth².
USHORT	maxSizeOfInstructions	Maximum byte count for glyph instructions.
USHORT	maxComponentElements	Maximum number of components referenced at "top level" for any composite glyph.
USHORT	maxComponentDepth	Maximum levels of recursion; 1 for simple components.

²This includes Font and CVT Programs, as well as the instructions for each glyph.