tt::unicode_mask Class Reference

#include <ttauri/text/unicode_mask.hpp>

Public Member Functions
constexpr	unicode_mask (unicode_mask const &) noexcept=default
constexpr	unicode_mask (unicode_mask &&) noexcept=default
constexpr unicode_mask &	operator= (unicode_mask const &) noexcept=default
constexpr unicode_mask &	operator= (unicode_mask &&) noexcept=default
constexpr size_t	size () const noexcept
bool	contains (char32_t c) const noexcept
	Check if the given code point is covered by this mask.
bool	contains_NFC (grapheme g) const noexcept
	Check if the full grapheme normalized to NFC is covered by this mask.
bool	contains_NFD (grapheme g) const noexcept
	Check if the full grapheme normalized to NFD is covered by this mask.
bool	contains (grapheme g) const noexcept
	Check if the full grapheme is covered by this mask.
bool	contains (unicode_mask const &other) const noexcept
	Check if all the code-points in other are covered by this mask.
void	add (char32_t first, char32_t last) noexcept
	Add a range of unicode code points to this mask.
unicode_mask &	operator|= (unicode_mask const &rhs) noexcept
	Combine two masks.
void	optimize () noexcept
	Optimize storage.
void	shrink_to_fit () noexcept
bool	holds_invariant () const noexcept
	Check to see if the mask is still valid.

Friends
unicode_mask	operator| (unicode_mask const &lhs, unicode_mask const &rhs) noexcept
	Combine two masks.

Detailed Description

A mask of unicode code-points.

This mask is used to determine which unicode code points are supported by a font. We need a fine grained mask so that we can find fallback glyphs for all unicode code points that are supported by the fonts.

At startup all the fonts are parsed and the unicode_mask is assembled, after this the font is unmapped from memory, but the unicode mask stays behind. Therefor the unicode mask should not use a lot of memory and be very fast to assemble.

Member Function Documentation

add()

void tt::unicode_mask::add ( char32_t first, char32_t last )

noexcept

Add a range of unicode code points to this mask.

Parameters

first	The first code-point to add.
last	One beyond the last code-point to add.

contains() [1/3]

bool tt::unicode_mask::contains ( char32_t c ) const

noexcept

Check if the given code point is covered by this mask.

contains() [2/3]

bool tt::unicode_mask::contains ( grapheme g ) const

noexcept

Check if the full grapheme is covered by this mask.

contains() [3/3]

bool tt::unicode_mask::contains ( unicode_mask const & other ) const

noexcept

Check if all the code-points in other are covered by this mask.

contains_NFC()

bool tt::unicode_mask::contains_NFC ( grapheme g ) const

noexcept

Check if the full grapheme normalized to NFC is covered by this mask.

contains_NFD()

bool tt::unicode_mask::contains_NFD ( grapheme g ) const

noexcept

Check if the full grapheme normalized to NFD is covered by this mask.

holds_invariant()

bool tt::unicode_mask::holds_invariant ( ) const

noexcept

Check to see if the mask is still valid.

operator|=()

unicode_mask & tt::unicode_mask::operator|= ( unicode_mask const & rhs )

inlinenoexcept

Combine two masks.

optimize()

void tt::unicode_mask::optimize ( )

noexcept

Optimize storage.

Friends And Related Symbol Documentation

operator|

unicode_mask operator| ( unicode_mask const & lhs, unicode_mask const & rhs )

friend

Combine two masks.

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The documentation for this class was generated from the following file:

• hikogui/src/ttauri/text/unicode_mask.hpp