impeller::GlyphAtlasContext Class Reference

A container for caching a glyph atlas across frames. More...

#include <glyph_atlas.h>

Public Member Functions
	GlyphAtlasContext (GlyphAtlas::Type type)
virtual	~GlyphAtlasContext ()
std::shared_ptr< GlyphAtlas >	GetGlyphAtlas () const
	Retrieve the current glyph atlas. More...
const ISize &	GetAtlasSize () const
	Retrieve the size of the current glyph atlas. More...
std::shared_ptr< RectanglePacker >	GetRectPacker () const
	Retrieve the previous (if any) rect packer. More...
int64_t	GetHeightAdjustment () const
	A y-coordinate shift that must be applied to glyphs appended to the atlas. More...
void	UpdateGlyphAtlas (std::shared_ptr< GlyphAtlas > atlas, ISize size, int64_t height_adjustment_)
	Update the context with a newly constructed glyph atlas. More...
void	UpdateRectPacker (std::shared_ptr< RectanglePacker > rect_packer)

Detailed Description

A container for caching a glyph atlas across frames.

Definition at line 218 of file glyph_atlas.h.

Constructor & Destructor Documentation

GlyphAtlasContext()

impeller::GlyphAtlasContext::GlyphAtlasContext ( GlyphAtlas::Type  type )

explicit

Definition at line 14 of file glyph_atlas.cc.

    : atlas_(std::make_shared<GlyphAtlas>(type, /*initial_generation=*/0)),
      atlas_size_(ISize(0, 0)) {}

~GlyphAtlasContext()

impeller::GlyphAtlasContext::~GlyphAtlasContext ( )

virtual

Definition at line 18 of file glyph_atlas.cc.

{}

Member Function Documentation

GetAtlasSize()

const ISize & impeller::GlyphAtlasContext::GetAtlasSize

(

)

const

Retrieve the size of the current glyph atlas.

Definition at line 24 of file glyph_atlas.cc.

                                                   {
  return atlas_size_;
}

GetGlyphAtlas()

std::shared_ptr< GlyphAtlas > impeller::GlyphAtlasContext::GetGlyphAtlas

(

)

const

Retrieve the current glyph atlas.

Definition at line 20 of file glyph_atlas.cc.

                                                                 {
  return atlas_;
}

GetHeightAdjustment()

int64_t impeller::GlyphAtlasContext::GetHeightAdjustment

(

)

const

A y-coordinate shift that must be applied to glyphs appended to the atlas.

The rectangle packer is only initialized for unfilled regions of the atlas. The area the rectangle packer covers is offset from the origin by this height adjustment.

Definition at line 28 of file glyph_atlas.cc.

                                                     {
  return height_adjustment_;
}

GetRectPacker()

std::shared_ptr< RectanglePacker > impeller::GlyphAtlasContext::GetRectPacker

(

)

const

Retrieve the previous (if any) rect packer.

Definition at line 32 of file glyph_atlas.cc.

                                                                      {
  return rect_packer_;
}

UpdateGlyphAtlas()

void impeller::GlyphAtlasContext::UpdateGlyphAtlas	(	std::shared_ptr< GlyphAtlas >	atlas,
		ISize	size,
		int64_t	height_adjustment_
	)

Update the context with a newly constructed glyph atlas.

Definition at line 36 of file glyph_atlas.cc.

                                                                    {
  atlas_ = std::move(atlas);
  atlas_size_ = size;
  height_adjustment_ = height_adjustment;
}

UpdateRectPacker()

void impeller::GlyphAtlasContext::UpdateRectPacker

(

std::shared_ptr< RectanglePacker >

rect_packer

)

Definition at line 44 of file glyph_atlas.cc.

                                                {
  rect_packer_ = std::move(rect_packer);
}

---

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

• impeller/typographer/glyph_atlas.h
• impeller/typographer/glyph_atlas.cc