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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.
+*/
+#ifndef __FONTENGINE_H__
+#define __FONTENGINE_H__
+
+#include <map>
+#include <vector>
+#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(narrow_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:
+ /** disable copy constructor */
+ FontEngine() :
+ m_settings(NULL),
+ m_env(NULL),
+ m_font_cache(),
+ m_default_size(),
+ m_currentMode(FM_Standard),
+ m_lastMode(),
+ m_lastSize(0),
+ m_lastFont(NULL)
+ {};
+
+ /** 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;
+
+ /** pointer to irrlicht gui environment */
+ gui::IGUIEnvironment* m_env;
+
+ /** 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;
+
+ /** font mode of last request */
+ FontMode m_lastMode;
+
+ /** size of last request */
+ unsigned int m_lastSize;
+
+ /** last font returned */
+ irr::gui::IGUIFont* m_lastFont;
+
+};
+
+/** interface to access main font engine*/
+extern FontEngine* glb_fontengine;
+
+#endif