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2022-10-20 20:29:11 +08:00
commit 4d531f8044
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+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License as
+//  published by the Free Software Foundation; either version 2 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
+//  General Public License for more details.
+//
+//  You should have received a copy of the GNU 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 <string>
+#include <map>
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+#if defined (SG_MAC)
+#include <OpenGL/gl.h>
+#include <GLUT/glut.h>
+#elif defined (_GLES2)
+#include <GLES2/gl2.h>
+#else
+#include <GL/glew.h> // Must be included before <GL/gl.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#endif
+
+
+/**
+ * A class to keep all fonts available for future use.
+ * This also assures a font isn't resident more than once.
+ */
+class FGFontCache {
+public:
+  FGFontCache ();
+  ~FGFontCache ();
+  bool Set_Font (const std::string& Font_Name,
+                 const float Size,
+                 GLuint &Glyph_Texture);
+  bool Get_Char (const char Char,
+                 int &X,     int &Y,
+                 int &Left,  int &Bottom,
+                 int &W,     int &H,
+                 double &X1, double &Y1, // Top (Y1) left (X1)
+                 double &X2, double &Y2) const; // Bottom (Y2) right (X2)
+private:
+  void Get_Pos (const unsigned short ASCII_Code,
+                const unsigned short Row,
+                const unsigned short Width,
+                unsigned int &Line,
+                unsigned int &Column) const;
+  void Get_Relative_Pos (const unsigned short ASCII_Code,
+                         const unsigned short Row,
+                         const unsigned short Width,
+                         double &X,
+                         double &Y) const;
+  static std::string Get_Size (const float Size);
+  static const unsigned short First_Printable_Char;
+  static const unsigned short Last_Printable_Char;
+  static const unsigned int Texture_Size = 1024;
+  FT_Library m_Ft;
+  typedef std::map <std::string, FT_Face *> Face_Map_Type;
+  Face_Map_Type m_Face_Map;
+  FT_Face *m_Current_Face_Ptr;
+  char m_Texture[Texture_Size * Texture_Size];
+  typedef std::map <std::string, unsigned int> Pos_Map_Type;
+  Pos_Map_Type m_Pos_Map;
+  unsigned int m_Current_Pos;
+  GLuint m_Glyph_Texture;
+};