#include <lazy_glyph_atlas.h>

Public Member Functions
	LazyGlyphAtlas (std::shared_ptr< TypographerContext > typographer_context)

	~LazyGlyphAtlas ()

void	AddTextFrame (const TextFrame &frame, Scalar scale)

void	ResetTextFrames ()

std::shared_ptr< GlyphAtlas >	CreateOrGetGlyphAtlas (Context &context, GlyphAtlas::Type type) const

Detailed Description

Definition at line 17 of file lazy_glyph_atlas.h.

Constructor & Destructor Documentation

◆ LazyGlyphAtlas()

impeller::LazyGlyphAtlas::LazyGlyphAtlas ( std::shared_ptr< TypographerContext > typographer_context )

explicit

Definition at line 14 of file lazy_glyph_atlas.cc.

     : typographer_context_(std::move(typographer_context)),
       alpha_context_(typographer_context_
                          ? typographer_context_->CreateGlyphAtlasContext()
                          : nullptr),
       color_context_(typographer_context_
                          ? typographer_context_->CreateGlyphAtlasContext()
                          : nullptr) {}

◆ ~LazyGlyphAtlas()

impeller::LazyGlyphAtlas::~LazyGlyphAtlas ( )

default

Member Function Documentation

◆ AddTextFrame()

void impeller::LazyGlyphAtlas::AddTextFrame	(	const TextFrame &	frame,
		Scalar	scale
	)

Definition at line 26 of file lazy_glyph_atlas.cc.

                                                                       {
   FML_DCHECK(atlas_map_.empty());
   if (frame.GetAtlasType() == GlyphAtlas::Type::kAlphaBitmap) {
     frame.CollectUniqueFontGlyphPairs(alpha_glyph_map_, scale);
   } else {
     frame.CollectUniqueFontGlyphPairs(color_glyph_map_, scale);
   }
 }

References impeller::TextFrame::CollectUniqueFontGlyphPairs(), impeller::TextFrame::GetAtlasType(), and impeller::GlyphAtlas::kAlphaBitmap.

Referenced by impeller::testing::TEST_P().

◆ CreateOrGetGlyphAtlas()

std::shared_ptr< GlyphAtlas > impeller::LazyGlyphAtlas::CreateOrGetGlyphAtlas	(	Context &	context,
		GlyphAtlas::Type	type
	)		const

Definition at line 41 of file lazy_glyph_atlas.cc.

                                {
   {
     auto atlas_it = atlas_map_.find(type);
     if (atlas_it != atlas_map_.end()) {
       return atlas_it->second;
     }
   }
  
   if (!typographer_context_) {
     VALIDATION_LOG << "Unable to render text because a TypographerContext has "
                       "not been set.";
     return nullptr;
   }
   if (!typographer_context_->IsValid()) {
     VALIDATION_LOG
         << "Unable to render text because the TypographerContext is invalid.";
     return nullptr;
   }
  
   auto& glyph_map = type == GlyphAtlas::Type::kAlphaBitmap ? alpha_glyph_map_
                                                            : color_glyph_map_;
   auto atlas_context =
       type == GlyphAtlas::Type::kAlphaBitmap ? alpha_context_ : color_context_;
   auto atlas = typographer_context_->CreateGlyphAtlas(context, type,
                                                       atlas_context, glyph_map);
   if (!atlas || !atlas->IsValid()) {
     VALIDATION_LOG << "Could not create valid atlas.";
     return nullptr;
   }
   atlas_map_[type] = atlas;
   return atlas;
 }

References impeller::GlyphAtlas::kAlphaBitmap, and VALIDATION_LOG.

Referenced by impeller::testing::TEST_P().

◆ ResetTextFrames()

void impeller::LazyGlyphAtlas::ResetTextFrames ( )

Definition at line 35 of file lazy_glyph_atlas.cc.

                                      {
   alpha_glyph_map_.clear();
   color_glyph_map_.clear();
   atlas_map_.clear();
 }

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

impeller/typographer/lazy_glyph_atlas.h
impeller/typographer/lazy_glyph_atlas.cc

Public Member Functions