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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 "util/basic_macros.h"
- #include "irrlichttypes.h"
- #include <IGUIFont.h>
- #include <IGUISkin.h>
- #include <IGUIEnvironment.h>
- #include "settings.h"
- #include "threading/mutex_auto_lock.h"
- #define FONT_SIZE_UNSPECIFIED 0xFFFFFFFF
- enum FontMode : u8 {
- FM_Standard = 0,
- FM_Mono,
- _FM_Fallback, // do not use directly
- FM_MaxMode,
- FM_Unspecified
- };
- struct FontSpec {
- FontSpec(unsigned int font_size, FontMode mode, bool bold, bool italic) :
- size(font_size),
- mode(mode),
- bold(bold),
- italic(italic) {}
- u16 getHash() const
- {
- return (mode << 2) | (static_cast<u8>(bold) << 1) | static_cast<u8>(italic);
- }
- unsigned int size;
- FontMode mode;
- bool bold;
- bool italic;
- };
- class FontEngine
- {
- public:
- FontEngine(gui::IGUIEnvironment* env);
- ~FontEngine();
- // Get best possible font specified by FontSpec
- irr::gui::IGUIFont *getFont(FontSpec spec);
- irr::gui::IGUIFont *getFont(unsigned int font_size=FONT_SIZE_UNSPECIFIED,
- FontMode mode=FM_Unspecified)
- {
- FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
- return getFont(spec);
- }
- /** get text height for a specific font */
- unsigned int getTextHeight(const FontSpec &spec);
- /** get text width if a text for a specific font */
- unsigned int getTextHeight(
- unsigned int font_size=FONT_SIZE_UNSPECIFIED,
- FontMode mode=FM_Unspecified)
- {
- FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
- return getTextHeight(spec);
- }
- unsigned int getTextWidth(const std::wstring &text, const FontSpec &spec);
- /** 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)
- {
- FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
- return getTextWidth(text, spec);
- }
- unsigned int getTextWidth(const std::string &text, const FontSpec &spec)
- {
- return getTextWidth(utf8_to_wide(text), spec);
- }
- unsigned int getTextWidth(const std::string& text,
- unsigned int font_size=FONT_SIZE_UNSPECIFIED,
- FontMode mode=FM_Unspecified)
- {
- FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
- return getTextWidth(utf8_to_wide(text), spec);
- }
- /** get line height for a specific font (including empty room between lines) */
- unsigned int getLineHeight(const FontSpec &spec);
- unsigned int getLineHeight(unsigned int font_size=FONT_SIZE_UNSPECIFIED,
- FontMode mode=FM_Unspecified)
- {
- FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
- return getLineHeight(spec);
- }
- /** get default font size */
- unsigned int getDefaultFontSize();
- /** get font size for a specific mode */
- unsigned int getFontSize(FontMode mode);
- /** update internal parameters from settings */
- void readSettings();
- private:
- irr::gui::IGUIFont *getFont(FontSpec spec, bool may_fail);
- /** update content of font cache in case of a setting change made it invalid */
- void updateFontCache();
- /** initialize a new TTF font */
- gui::IGUIFont *initFont(const FontSpec &spec);
- /** update current minetest skin with font changes */
- void updateSkin();
- /** clean cache */
- void cleanCache();
- /** pointer to irrlicht gui environment */
- gui::IGUIEnvironment* m_env = nullptr;
- /** mutex used to protect font init and cache */
- std::recursive_mutex m_font_mutex;
- /** internal storage for caching fonts of different size */
- std::map<unsigned int, irr::gui::IGUIFont*> m_font_cache[FM_MaxMode << 2];
- /** default font size to use */
- unsigned int m_default_size[FM_MaxMode];
- /** default bold and italic */
- bool m_default_bold = false;
- bool m_default_italic = false;
- /** default font engine mode (fixed) */
- static const FontMode m_currentMode = FM_Standard;
- DISABLE_CLASS_COPY(FontEngine);
- };
- /** interface to access main font engine*/
- extern FontEngine* g_fontengine;
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