BackendFontSFML.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2023 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_BACKEND_FONT_SFML_HPP
#define TGUI_BACKEND_FONT_SFML_HPP
 
#include <SFML/Graphics/Font.hpp>
 
#include <TGUI/Config.hpp>
#if TGUI_BUILD_AS_CXX_MODULE
 import tgui;
#else
 #include <TGUI/Backend/Font/BackendFont.hpp>
#endif
 
#if !TGUI_EXPERIMENTAL_USE_STD_MODULE
 #include <unordered_set>
 #include <memory>
 #include <map>
#endif
 
 
TGUI_MODULE_EXPORT namespace tgui
{
 class TGUI_API BackendFontSFML : public BackendFont
 {
 public:
 
 bool loadFromMemory(std::unique_ptr<std::uint8_t[]> data, std::size_t sizeInBytes) override;
 using BackendFont::loadFromMemory;
 
 
 TGUI_NODISCARD bool hasGlyph(char32_t codePoint) const override;
 
 
 TGUI_NODISCARD FontGlyph getGlyph(char32_t codePoint, unsigned int characterSize, bool bold, float outlineThickness = 0) override;
 
 
 TGUI_NODISCARD float getKerning(char32_t first, char32_t second, unsigned int characterSize, bool bold) override;
 
 
 TGUI_NODISCARD float getLineSpacing(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD float getFontHeight(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD float getAscent(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD float getDescent(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD float getUnderlinePosition(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD float getUnderlineThickness(unsigned int characterSize) override;
 
 
 TGUI_NODISCARD std::shared_ptr<BackendTexture> getTexture(unsigned int characterSize, unsigned int& textureVersion) override;
 
 
 TGUI_NODISCARD Vector2u getTextureSize(unsigned int characterSize) override;
 
 
 void setSmooth(bool smooth) override;
 
 
 void setFontScale(float scale) override;
 
 
 TGUI_NODISCARD sf::Font& getInternalFont();
 
 
 protected:
 
 sf::Font m_font;
 std::unique_ptr<std::uint8_t[]> m_fileContents;
 
 std::unordered_set<std::uint64_t> m_loadedGlyphKeys;
 
 // We keep one texture per character size. Other font backends don't do this, but this is to prevent existing code
 // from breaking since sf::Font does the same.
 std::map<unsigned int, std::shared_ptr<BackendTexture>> m_textures;
 std::map<unsigned int, unsigned int> m_textureVersions;
 };
}
 
 
#endif // TGUI_BACKEND_FONT_SFML_HPP