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