| Flutter Impeller |

lazy_glyph_atlas.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #pragma once
6
7 #include <unordered_map>
8
9 #include "flutter/fml/macros.h"
10 #include "impeller/renderer/context.h"
11 #include "impeller/typographer/glyph_atlas.h"
12 #include "impeller/typographer/text_frame.h"
13 #include "impeller/typographer/typographer_context.h"
14
15 namespace impeller {
16
17 class LazyGlyphAtlas {
18 public:
19 explicit LazyGlyphAtlas(
20 std::shared_ptr<TypographerContext> typographer_context);
21
22 ~LazyGlyphAtlas();
23
24 void AddTextFrame(const TextFrame& frame, Scalar scale);
25
26 void ResetTextFrames();
27
28 std::shared_ptr<GlyphAtlas> CreateOrGetGlyphAtlas(
29 Context& context,
30 GlyphAtlas::Type type) const;
31
32 private:
33 std::shared_ptr<TypographerContext> typographer_context_;
34
35 FontGlyphMap alpha_glyph_map_;
36 FontGlyphMap color_glyph_map_;
37 std::shared_ptr<GlyphAtlasContext> alpha_context_;
38 std::shared_ptr<GlyphAtlasContext> color_context_;
39 mutable std::unordered_map<GlyphAtlas::Type, std::shared_ptr<GlyphAtlas>>
40 atlas_map_;
41
42 FML_DISALLOW_COPY_AND_ASSIGN(LazyGlyphAtlas);
43 };
44
45 } // namespace impeller
impeller::LazyGlyphAtlas::~LazyGlyphAtlas
~LazyGlyphAtlas()
impeller::Scalar
float Scalar
Definition: scalar.h:15
impeller::LazyGlyphAtlas::ResetTextFrames
void ResetTextFrames()
Definition: lazy_glyph_atlas.cc:35
impeller::TextFrame
Represents a collection of shaped text runs.
Definition: text_frame.h:19
impeller::LazyGlyphAtlas::AddTextFrame
void AddTextFrame(const TextFrame &frame, Scalar scale)
Definition: lazy_glyph_atlas.cc:26
impeller::FontGlyphMap
std::unordered_map< ScaledFont, std::unordered_set< Glyph > > FontGlyphMap
Definition: font_glyph_pair.h:28
typographer_context.h
impeller::LazyGlyphAtlas::CreateOrGetGlyphAtlas
std::shared_ptr< GlyphAtlas > CreateOrGetGlyphAtlas(Context &context, GlyphAtlas::Type type) const
Definition: lazy_glyph_atlas.cc:41
impeller::LazyGlyphAtlas::LazyGlyphAtlas
LazyGlyphAtlas(std::shared_ptr< TypographerContext > typographer_context)
Definition: lazy_glyph_atlas.cc:14
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:47
context.h
glyph_atlas.h
text_frame.h
impeller::LazyGlyphAtlas
Definition: lazy_glyph_atlas.h:17
impeller
Definition: aiks_context.cc:10