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Diffstat (limited to 'src/client/fontengine.h')
-rw-r--r-- | src/client/fontengine.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/client/fontengine.h b/src/client/fontengine.h new file mode 100644 index 000000000..a75618f86 --- /dev/null +++ b/src/client/fontengine.h @@ -0,0 +1,128 @@ +/* +Minetest +Copyright (C) 2010-2014 sapier <sapier at gmx dot net> + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once + +#include <map> +#include <vector> +#include "util/basic_macros.h" +#include <IGUIFont.h> +#include <IGUISkin.h> +#include <IGUIEnvironment.h> +#include "settings.h" + +#define FONT_SIZE_UNSPECIFIED 0xFFFFFFFF + +enum FontMode { + FM_Standard = 0, + FM_Mono, + FM_Fallback, + FM_Simple, + FM_SimpleMono, + FM_MaxMode, + FM_Unspecified +}; + +class FontEngine +{ +public: + + FontEngine(Settings* main_settings, gui::IGUIEnvironment* env); + + ~FontEngine(); + + /** get Font */ + irr::gui::IGUIFont* getFont(unsigned int font_size=FONT_SIZE_UNSPECIFIED, + FontMode mode=FM_Unspecified); + + /** get text height for a specific font */ + unsigned int getTextHeight(unsigned int font_size=FONT_SIZE_UNSPECIFIED, + FontMode mode=FM_Unspecified); + + /** get text width if a text for a specific font */ + unsigned int getTextWidth(const std::string& text, + unsigned int font_size=FONT_SIZE_UNSPECIFIED, + FontMode mode=FM_Unspecified) + { + return getTextWidth(utf8_to_wide(text)); + } + + /** get text width if a text for a specific font */ + unsigned int getTextWidth(const std::wstring& text, + unsigned int font_size=FONT_SIZE_UNSPECIFIED, + FontMode mode=FM_Unspecified); + + /** get line height for a specific font (including empty room between lines) */ + unsigned int getLineHeight(unsigned int font_size=FONT_SIZE_UNSPECIFIED, + FontMode mode=FM_Unspecified); + + /** get default font size */ + unsigned int getDefaultFontSize(); + + /** initialize font engine */ + void initialize(Settings* main_settings, gui::IGUIEnvironment* env); + + /** update internal parameters from settings */ + void readSettings(); + +private: + /** update content of font cache in case of a setting change made it invalid */ + void updateFontCache(); + + /** initialize a new font */ + void initFont(unsigned int basesize, FontMode mode=FM_Unspecified); + + /** initialize a font without freetype */ + void initSimpleFont(unsigned int basesize, FontMode mode); + + /** update current minetest skin with font changes */ + void updateSkin(); + + /** clean cache */ + void cleanCache(); + + /** pointer to settings for registering callbacks or reading config */ + Settings* m_settings = nullptr; + + /** pointer to irrlicht gui environment */ + gui::IGUIEnvironment* m_env = nullptr; + + /** internal storage for caching fonts of different size */ + std::map<unsigned int, irr::gui::IGUIFont*> m_font_cache[FM_MaxMode]; + + /** default font size to use */ + unsigned int m_default_size[FM_MaxMode]; + + /** current font engine mode */ + FontMode m_currentMode = FM_Standard; + + /** font mode of last request */ + FontMode m_lastMode; + + /** size of last request */ + unsigned int m_lastSize = 0; + + /** last font returned */ + irr::gui::IGUIFont* m_lastFont = nullptr; + + DISABLE_CLASS_COPY(FontEngine); +}; + +/** interface to access main font engine*/ +extern FontEngine* g_fontengine; |