Flutter Impeller
lazy_glyph_atlas.h
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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_IMPELLER_TYPOGRAPHER_LAZY_GLYPH_ATLAS_H_
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#define FLUTTER_IMPELLER_TYPOGRAPHER_LAZY_GLYPH_ATLAS_H_
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#include <unordered_map>
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#include "flutter/fml/macros.h"
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#include "
impeller/renderer/context.h
"
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#include "
impeller/typographer/glyph_atlas.h
"
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#include "
impeller/typographer/text_frame.h
"
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#include "
impeller/typographer/typographer_context.h
"
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namespace
impeller
{
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class
LazyGlyphAtlas
{
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public
:
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explicit
LazyGlyphAtlas
(
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std::shared_ptr<TypographerContext> typographer_context);
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~LazyGlyphAtlas
();
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void
AddTextFrame
(
const
TextFrame
& frame,
Scalar
scale
);
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void
ResetTextFrames
();
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const
std::shared_ptr<GlyphAtlas>&
CreateOrGetGlyphAtlas
(
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Context
& context,
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GlyphAtlas::Type
type)
const
;
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private
:
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std::shared_ptr<TypographerContext> typographer_context_;
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FontGlyphMap
alpha_glyph_map_;
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FontGlyphMap
color_glyph_map_;
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std::shared_ptr<GlyphAtlasContext> alpha_context_;
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std::shared_ptr<GlyphAtlasContext> color_context_;
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mutable
std::shared_ptr<GlyphAtlas> alpha_atlas_;
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mutable
std::shared_ptr<GlyphAtlas> color_atlas_;
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LazyGlyphAtlas
(
const
LazyGlyphAtlas
&) =
delete
;
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LazyGlyphAtlas
& operator=(
const
LazyGlyphAtlas
&) =
delete
;
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};
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}
// namespace impeller
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#endif // FLUTTER_IMPELLER_TYPOGRAPHER_LAZY_GLYPH_ATLAS_H_
impeller::LazyGlyphAtlas::~LazyGlyphAtlas
~LazyGlyphAtlas()
impeller::Scalar
float Scalar
Definition:
scalar.h:18
impeller::LazyGlyphAtlas::ResetTextFrames
void ResetTextFrames()
Definition:
lazy_glyph_atlas.cc:40
impeller::TextFrame
Represents a collection of shaped text runs.
Definition:
text_frame.h:20
impeller::LazyGlyphAtlas::AddTextFrame
void AddTextFrame(const TextFrame &frame, Scalar scale)
Definition:
lazy_glyph_atlas.cc:31
impeller::FontGlyphMap
std::unordered_map< ScaledFont, std::unordered_set< Glyph > > FontGlyphMap
Definition:
font_glyph_pair.h:29
typographer_context.h
impeller::LazyGlyphAtlas::CreateOrGetGlyphAtlas
const std::shared_ptr< GlyphAtlas > & CreateOrGetGlyphAtlas(Context &context, GlyphAtlas::Type type) const
Definition:
lazy_glyph_atlas.cc:47
impeller::LazyGlyphAtlas::LazyGlyphAtlas
LazyGlyphAtlas(std::shared_ptr< TypographerContext > typographer_context)
Definition:
lazy_glyph_atlas.cc:19
impeller::GlyphAtlas::Type
Type
Describes how the glyphs are represented in the texture.
Definition:
glyph_atlas.h:32
impeller::Context
To do anything rendering related with Impeller, you need a context.
Definition:
context.h:46
scale
const Scalar scale
Definition:
stroke_path_geometry.cc:297
context.h
glyph_atlas.h
text_frame.h
impeller::LazyGlyphAtlas
Definition:
lazy_glyph_atlas.h:18
impeller
Definition:
aiks_blur_unittests.cc:20
impeller
typographer
lazy_glyph_atlas.h
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