pangomm: Pango::Coverage Class Reference

pangomm 2.36.0

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Pango::Coverage Class Reference

A Pango::Coverage represents a map from ISO-10646 character point to Pango::CoverageLevel. More...

`#include <pangomm/coverage.h>`

## Public Member Functions
void | reference () const
| Increment the reference count for this object. More...
void | unreference () const
| Decrement the reference count for this object. More...
PangoCoverage* | gobj ()
| Provides access to the underlying C instance. More...
const PangoCoverage* | gobj () const
| Provides access to the underlying C instance. More...
PangoCoverage* | gobj_copy () const
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
CoverageLevel | get (int index) const
| Determine whether a particular index is covered by coverage. More...
void | set (int index, CoverageLevel level)
| Modify a particular index within coverage. More...
void | max (const Glib::RefPtr< Coverage >& other) const
| Set the coverage for each index in coverage to be the max (better) value of the current coverage for the index and the coverage for the corresponding index in other. More...
Glib::ArrayHandle< unsigned char > | to_bytes () const
| Convert the coverage map into a flat binary format. More...

## Static Public Member Functions
static Glib::RefPtr< Coverage > | create ()
static Glib::RefPtr< Coverage > | create (const guchar* bytes, int n_bytes)
| Convert data generated from pango_coverage_to_bytes() back to a Pango::Coverage. More...

## Protected Member Functions
| Coverage ()
void | operator delete (void*, std::size_t)

## Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Pango::Coverage > | wrap (PangoCoverage* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Detailed Description

A Pango::Coverage represents a map from ISO-10646 character point to Pango::CoverageLevel.

It is often necessary in pango to determine if a particular font can represent a particular character, and also how well it can represent that character. Pango::Coverage holds this information.

## Constructor & Destructor Documentation

Pango::Coverage::Coverage | ( |  | ) |
| protected

## Member Function Documentation

static Glib::RefPtr<Coverage> Pango::Coverage::create | ( |  | ) |
| static

static Glib::RefPtr<Coverage> Pango::Coverage::create | ( | const guchar * | bytes,
|  | int | n_bytes
| ) |  |
| static

Convert data generated from pango_coverage_to_bytes() back to a Pango::Coverage.

Parameters

  bytes | Binary data representing a Pango::Coverage.
  n_bytes | The size of bytes in bytes.

Returns
  A newly allocated Pango::Coverage, or `0` if the data was invalid.

CoverageLevel Pango::Coverage::get | ( | int | index | ) | const

Determine whether a particular index is covered by coverage.

Parameters

  index | The index to check.

Returns
  The coverage level of coverage for character index.

PangoCoverage* Pango::Coverage::gobj | ( |  | ) |

Provides access to the underlying C instance.

const PangoCoverage* Pango::Coverage::gobj | ( |  | ) | const

Provides access to the underlying C instance.

PangoCoverage* Pango::Coverage::gobj_copy | ( |  | ) | const

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

void Pango::Coverage::max | ( | const Glib::RefPtr< Coverage >& | other | ) | const

Set the coverage for each index in coverage to be the max (better) value of the current coverage for the index and the coverage for the corresponding index in other.

Parameters

  other | Another Pango::Coverage.

void Pango::Coverage::operator delete | ( | void * | ,
|  | std::size_t |
| ) |  |
| protected

void Pango::Coverage::reference | ( |  | ) | const

Increment the reference count for this object.

You should never need to do this manually - use the object via a RefPtr instead.

void Pango::Coverage::set | ( | int | index,
|  | CoverageLevel | level
| ) |  |

Modify a particular index within coverage.

Parameters

  index | The index to modify.
  level | The new level for index.

Glib::ArrayHandle<unsigned char> Pango::Coverage::to_bytes | ( |  | ) | const

Convert the coverage map into a flat binary format.

Returns
  An array of bytes representing the coverage map.

void Pango::Coverage::unreference | ( |  | ) | const

Decrement the reference count for this object.

You should never need to do this manually - use the object via a RefPtr instead.

## Friends And Related Function Documentation

Glib::RefPtr< Pango::Coverage > wrap | ( | PangoCoverage * | object,
|  | bool | take_copy = `false`
| ) |  |
| related

A Glib::wrap() method for this object.

Parameters

  object | The C instance.
  take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns
  A C++ instance that wraps this C instance.