impeller::FontGlyphAtlas Class Reference

An object that can look up glyph locations within the GlyphAtlas for a particular typeface. More...

#include <glyph_atlas.h>

Public Member Functions
	FontGlyphAtlas ()=default
	FontGlyphAtlas (FontGlyphAtlas &&)=default
std::optional< FrameBounds >	FindGlyphBounds (const SubpixelGlyph &glyph) const
	Find the location of a glyph in the atlas. More...
void	AppendGlyph (const SubpixelGlyph &glyph, const FrameBounds &frame_bounds)
	Append the frame bounds of a glyph to this atlas. More...

Friends
class	GlyphAtlas

Detailed Description

An object that can look up glyph locations within the GlyphAtlas for a particular typeface.

Definition at line 269 of file glyph_atlas.h.

Constructor & Destructor Documentation

FontGlyphAtlas() [1/2]

impeller::FontGlyphAtlas::FontGlyphAtlas ( )

default

FontGlyphAtlas() [2/2]

impeller::FontGlyphAtlas::FontGlyphAtlas ( FontGlyphAtlas &&  )

default

Member Function Documentation

AppendGlyph()

void impeller::FontGlyphAtlas::AppendGlyph	(	const SubpixelGlyph &	glyph,
		const FrameBounds &	frame_bounds
	)

Append the frame bounds of a glyph to this atlas.

        This may indicate a placeholder glyph location to be replaced
        at a later time, as indicated by FrameBounds.placeholder. 

Definition at line 140 of file glyph_atlas.cc.

                                                                  {
  positions_[glyph] = frame_bounds;
}

FindGlyphBounds()

std::optional< FrameBounds > impeller::FontGlyphAtlas::FindGlyphBounds

(

const SubpixelGlyph &

glyph

)

const

Find the location of a glyph in the atlas.

Parameters

[in]

glyph

The glyph

Returns

The location of the glyph in the atlas. std::nullopt if the glyph is not in the atlas.

Definition at line 131 of file glyph_atlas.cc.

                                      {
  const auto& found = positions_.find(glyph);
  if (found == positions_.end()) {
    return std::nullopt;
  }
  return found->second;
}

Referenced by impeller::TextContents::ComputeVertexData().

Friends And Related Function Documentation

GlyphAtlas

friend class GlyphAtlas

friend

Definition at line 292 of file glyph_atlas.h.

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

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