TGUI  1.0-alpha
BackendFontSFML.hpp
1
2//
3// TGUI - Texus' Graphical User Interface
4// Copyright (C) 2012-2022 Bruno Van de Velde (vdv_b@tgui.eu)
5//
6// This software is provided 'as-is', without any express or implied warranty.
7// In no event will the authors be held liable for any damages arising from the use of this software.
8//
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10// including commercial applications, and to alter it and redistribute it freely,
11// subject to the following restrictions:
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14// you must not claim that you wrote the original software.
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22//
24
25
26#ifndef TGUI_BACKEND_FONT_SFML_HPP
27#define TGUI_BACKEND_FONT_SFML_HPP
28
29#include <TGUI/Backend/Font/BackendFont.hpp>
30#include <SFML/Graphics/Font.hpp>
31#include <unordered_set>
32#include <memory>
33#include <map>
34
36
37namespace tgui
38{
42 class TGUI_API BackendFontSFML : public BackendFont
43 {
44 public:
45
54 bool loadFromMemory(std::unique_ptr<std::uint8_t[]> data, std::size_t sizeInBytes) override;
56
57
65 bool hasGlyph(char32_t codePoint) const override;
66
67
81 FontGlyph getGlyph(char32_t codePoint, unsigned int characterSize, bool bold, float outlineThickness = 0) override;
82
83
98 float getKerning(char32_t first, char32_t second, unsigned int characterSize, bool bold) override;
99
100
110 float getLineSpacing(unsigned int characterSize) override;
111
112
122 float getUnderlinePosition(unsigned int characterSize) override;
123
124
134 float getUnderlineThickness(unsigned int characterSize) override;
135
136
144 std::shared_ptr<BackendTexture> getTexture(unsigned int characterSize) override;
145
146
156 void setSmooth(bool smooth) override;
157
158
164 sf::Font& getInternalFont();
165
166
168 protected:
169
170 sf::Font m_font;
171 std::unique_ptr<std::uint8_t[]> m_fileContents;
172
173 std::unordered_set<std::uint64_t> m_loadedGlyphKeys;
174
175 // We keep one texture per character size. Other font backends don't do this, but this is to prevent existing code
176 // from breaking since sf::Font does the same.
177 std::map<unsigned int, std::shared_ptr<BackendTexture>> m_textures;
178 };
179}
180
182
183#endif // TGUI_BACKEND_FONT_SFML_HPP
Font implementation that makes use of SFML.
Definition: BackendFontSFML.hpp:43
float getUnderlinePosition(unsigned int characterSize) override
Get the position of the underline.
bool hasGlyph(char32_t codePoint) const override
Returns whether a font contains a certain glyph.
FontGlyph getGlyph(char32_t codePoint, unsigned int characterSize, bool bold, float outlineThickness=0) override
Retrieve a glyph of the font.
std::shared_ptr< BackendTexture > getTexture(unsigned int characterSize) override
Returns the texture that is used to store glyphs of the given character size.
float getUnderlineThickness(unsigned int characterSize) override
Get the thickness of the underline.
bool loadFromMemory(std::unique_ptr< std::uint8_t[]> data, std::size_t sizeInBytes) override
Loads a font from memory.
void setSmooth(bool smooth) override
Enable or disable the smooth filter.
float getLineSpacing(unsigned int characterSize) override
Returns the line spacing.
float getKerning(char32_t first, char32_t second, unsigned int characterSize, bool bold) override
Returns the kerning offset of two glyphs.
Base class for font implementations that depend on the backend.
Definition: BackendFont.hpp:43
virtual bool loadFromMemory(std::unique_ptr< std::uint8_t[]> data, std::size_t sizeInBytes)=0
Loads a font from memory.
Namespace that contains all TGUI functions and classes.
Definition: AbsoluteOrRelativeValue.hpp:36
Information about a glyph in the font.
Definition: Font.hpp:47