impeller::interop::TypographyContext Class Reference

#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.

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

~TypographyContext()

impeller::interop::TypographyContext::~TypographyContext ( )

overridedefault

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.

                                           {
  return collection_;
}

IsValid()

bool impeller::interop::TypographyContext::IsValid

(

)

const

Definition at line 34 of file typography_context.cc.

                                      {
  return !!collection_;
}

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.

                                                                    {
  auto typeface = CreateTypefaceFromFontData(std::move(font_data));
  if (typeface == nullptr) {
    return false;
  }
  size_t result = 0u;
  if (family_name_alias == nullptr) {
    result = asset_font_manager_->registerTypeface(std::move(typeface));
  } else {
    result = asset_font_manager_->registerTypeface(std::move(typeface),
                                                   SkString{family_name_alias});
  }
  return result != 0;
}

References impeller::interop::CreateTypefaceFromFontData().

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

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