| Flutter Impeller |

Public Member Functions | List of all members
impeller::interop::TypographyContext Class Referencefinal

`#include <typography_context.h>`

Inheritance diagram for impeller::interop::TypographyContext:

## Public Member Functions
| TypographyContext ()
| ~TypographyContext () override
| TypographyContext (const TypographyContext &)=delete
TypographyContext & | operator= (const TypographyContext &)=delete
bool | IsValid () const
const std::shared_ptr< txt::FontCollection > & | GetFontCollection () const
bool | RegisterFont (std::unique_ptr< fml::Mapping > font_data, const char *family_name_alias)
| Registers custom font data. If an alias for the family name is provided, subsequent lookups will need to use that same alias. If not, the family name will be read from the font data. More...
Public Member Functions inherited from impeller::interop::ObjectBase
| ObjectBase ()=default
virtual | ~ObjectBase ()=default
| ObjectBase (const ObjectBase &)=delete
| ObjectBase (ObjectBase &&)=delete
ObjectBase & | operator= (const ObjectBase &)=delete
ObjectBase & | operator= (ObjectBase &&)=delete
void | Retain ()
void | Release ()
uint64_t | GetRefCountForTests () const

## Additional Inherited Members
Public Types inherited from impeller::interop::Object< TypographyContext, IMPELLER_INTERNAL_HANDLE_NAME(ImpellerTypographyContext)>
using | InteropClass = TypographyContext
using | InteropCSibling = IMPELLER_INTERNAL_HANDLE_NAME(ImpellerTypographyContext)
Static Public Member Functions inherited from impeller::interop::ObjectBase
static void | SafeRetain (void *ptr)
static void | SafeRelease (void *ptr)

## Detailed Description

Definition at line 17 of file typography_context.h.

## Constructor & Destructor Documentation

## ◆ TypographyContext() [1/2]

impeller::interop::TypographyContext::TypographyContext | ( |  | ) |

Definition at line 16 of file typography_context.cc.

17 : collection_(std::make_shared<txt::FontCollection>()) {
18 static std::once_flag sICUInitOnceFlag;
19 std::call_once(sICUInitOnceFlag, []() {
20 auto icu_data = std::make_unique<fml::NonOwnedMapping>(
21 impeller_embedded_icu_data_data, impeller_embedded_icu_data_length);
22 fml::icu::InitializeICUFromMapping(std::move(icu_data));
23 });
24 // The fallback for all fonts. Looks in platform specific locations.
25 collection_->SetupDefaultFontManager(0u);
26
27 // Looks for fonts in user supplied blobs.
28 asset_font_manager_ = sk_make_sp<skia::textlayout::TypefaceFontProvider>();
29 collection_->SetAssetFontManager(asset_font_manager_);
30 }

## ◆ ~TypographyContext()

impeller::interop::TypographyContext::~TypographyContext | ( |  | ) |
| override default

## ◆ TypographyContext() [2/2]

impeller::interop::TypographyContext::TypographyContext | ( | const TypographyContext & |  | ) |
| delete

## Member Function Documentation

## ◆ GetFontCollection()

const std::shared_ptr< txt::FontCollection > & impeller::interop::TypographyContext::GetFontCollection | ( |  | ) | const

Definition at line 39 of file typography_context.cc.

39 {
40 return collection_;
41 }

## ◆ IsValid()

bool impeller::interop::TypographyContext::IsValid | ( |  | ) | const

Definition at line 34 of file typography_context.cc.

34 {
35 return !!collection_;
36 }

## ◆ operator=()

TypographyContext& impeller::interop::TypographyContext::operator= | ( | const TypographyContext & |  | ) |
| delete

## ◆ RegisterFont()

bool impeller::interop::TypographyContext::RegisterFont | ( | std::unique_ptr< fml::Mapping > | font_data,
|  | const char * | family_name_alias
| ) |  |

Registers custom font data. If an alias for the family name is provided, subsequent lookups will need to use that same alias. If not, the family name will be read from the font data.

Parameters

  [in] | font_data | The font data
  [in] | family_name_alias | The family name alias

Returns
  If the font data could be successfully registered.

Definition at line 68 of file typography_context.cc.

69 {
70 auto typeface = CreateTypefaceFromFontData(std::move(font_data));
71 if (typeface == nullptr) {
72 return false;
73 }
74 size_t result = 0u;
75 if (family_name_alias == nullptr) {
76 result = asset_font_manager_->registerTypeface(std::move(typeface));
77 } else {
78 result = asset_font_manager_->registerTypeface(std::move(typeface),
79 SkString{family_name_alias});
80 }
81 return result != 0;
82 }
impeller::interop::CreateTypefaceFromFontData
static sk_sp< SkTypeface > CreateTypefaceFromFontData(std::unique_ptr< fml::Mapping > font_data)
Definition: typography_context.cc:43

References impeller::interop::CreateTypefaceFromFontData().

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

- impeller/toolkit/interop/typography_context.h
- impeller/toolkit/interop/typography_context.cc