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- /*
- 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;
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