flutter::AssetManagerFontStyleSet Class Reference

#include <asset_manager_font_provider.h>

Inheritance diagram for flutter::AssetManagerFontStyleSet:

Public Types
using	CreateTypefaceRet = decltype(std::declval< SkFontStyleSet >().createTypeface(0))
using	MatchStyleRet = decltype(std::declval< SkFontStyleSet >().matchStyle(std::declval< SkFontStyle >()))

Public Member Functions
	AssetManagerFontStyleSet (std::shared_ptr< AssetManager > asset_manager, std::string family_name)
	~AssetManagerFontStyleSet () override
void	registerAsset (const std::string &asset)
int	count () override
void	getStyle (int index, SkFontStyle *, SkString *style) override
CreateTypefaceRet	createTypeface (int index) override
MatchStyleRet	matchStyle (const SkFontStyle &pattern) override

Detailed Description

Definition at line 21 of file asset_manager_font_provider.h.

Member Typedef Documentation

CreateTypefaceRet

using flutter::AssetManagerFontStyleSet::CreateTypefaceRet = decltype(std::declval<SkFontStyleSet>().createTypeface(0))

Definition at line 37 of file asset_manager_font_provider.h.

MatchStyleRet

using flutter::AssetManagerFontStyleSet::MatchStyleRet = decltype(std::declval<SkFontStyleSet>().matchStyle( std::declval<SkFontStyle>()))

Definition at line 42 of file asset_manager_font_provider.h.

Constructor & Destructor Documentation

AssetManagerFontStyleSet()

flutter::AssetManagerFontStyleSet::AssetManagerFontStyleSet	(	std::shared_ptr< AssetManager >	asset_manager,
		std::string	family_name
	)

Definition at line 70 of file asset_manager_font_provider.cc.

    : asset_manager_(std::move(asset_manager)),
      family_name_(std::move(family_name)) {}

~AssetManagerFontStyleSet()

flutter::AssetManagerFontStyleSet::~AssetManagerFontStyleSet ( )

overridedefault

Member Function Documentation

count()

int flutter::AssetManagerFontStyleSet::count ( )

override

Definition at line 82 of file asset_manager_font_provider.cc.

                                    {
  return assets_.size();
}

createTypeface()

auto flutter::AssetManagerFontStyleSet::createTypeface ( int  index )

override

Definition at line 101 of file asset_manager_font_provider.cc.

                                                                        {
  size_t index = i;
  if (index >= assets_.size()) {
    return nullptr;
  }
 
  TypefaceAsset& asset = assets_[index];
  if (!asset.typeface) {
    std::unique_ptr<fml::Mapping> asset_mapping =
        asset_manager_->GetAsMapping(asset.asset);
    if (asset_mapping == nullptr) {
      return nullptr;
    }
 
    fml::Mapping* asset_mapping_ptr = asset_mapping.release();
    sk_sp<SkData> asset_data = SkData::MakeWithProc(
        asset_mapping_ptr->GetMapping(), asset_mapping_ptr->GetSize(),
        MappingReleaseProc, asset_mapping_ptr);
    std::unique_ptr<SkMemoryStream> stream = SkMemoryStream::Make(asset_data);
 
    sk_sp<SkFontMgr> font_mgr = txt::GetDefaultFontManager();
    // Ownership of the stream is transferred.
    asset.typeface = font_mgr->makeFromStream(std::move(stream));
    if (!asset.typeface) {
      FML_DLOG(ERROR) << "Unable to load font asset for family: "
                      << family_name_;
      return nullptr;
    }
  }
 
  return CreateTypefaceRet(SkRef(asset.typeface.get()));
}

References FML_DLOG, txt::GetDefaultFontManager(), fml::Mapping::GetMapping(), fml::Mapping::GetSize(), and i.

Referenced by getStyle().

getStyle()

void flutter::AssetManagerFontStyleSet::getStyle ( int  index, SkFontStyle *  style, SkString *  style  )

override

Definition at line 86 of file asset_manager_font_provider.cc.

                                                        {
  FML_DCHECK(index < static_cast<int>(assets_.size()));
  if (style) {
    sk_sp<SkTypeface> typeface(createTypeface(index));
    if (typeface) {
      *style = typeface->fontStyle();
    }
  }
  if (name) {
    *name = family_name_.c_str();
  }
}

References createTypeface(), FML_DCHECK, and flutter::name.

matchStyle()

auto flutter::AssetManagerFontStyleSet::matchStyle ( const SkFontStyle &  pattern )

override

Definition at line 134 of file asset_manager_font_provider.cc.

                     {
  return matchStyleCSS3(pattern);
}

registerAsset()

void flutter::AssetManagerFontStyleSet::registerAsset

(

const std::string &

asset

)

Definition at line 78 of file asset_manager_font_provider.cc.

                                                                   {
  assets_.emplace_back(asset);
}

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

• lib/ui/text/asset_manager_font_provider.h
• lib/ui/text/asset_manager_font_provider.cc