Font.cpp

   1 /*
   2  * This file is part of NumptyPhysics
   3  * Copyright (C) 2008 Tim Edmonds
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 3 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  */
  16 #include "Font.h"
  17 #include "Canvas.h"
  18 #include "Config.h"
  19 #include <SDL/SDL_ttf.h>
  20
  21 #define FONT(fONTpTR) ((TTF_Font*)((fONTpTR)->m_state))
  22
  23 struct FontCanvas : public Canvas
  24 {
  25   FontCanvas( SDL_Surface* s )
  26     : Canvas( s )
  27   {}
  28 };
  29
  30
  31 Font::Font( const std::string& file, int ptsize )
  32 {
  33   TTF_Init();
  34   std::string fname = Config::findFile(file);
  35   m_state = TTF_OpenFont( fname.c_str(), ptsize );
  36 }
  37
  38
  39 Vec2 Font::metrics( const std::string& text ) const
  40 {
  41   Vec2 m;
  42   TTF_SizeText( FONT(this), text.c_str(), &m.x, &m.y );
  43   return m;
  44 }
  45
  46 Canvas* Font::renderFont(const std::string& text, int colour) const
  47 {
  48     return new FontCanvas( TTF_RenderText_Blended( FONT(this),
  49                                            text.c_str(),
  50                                            SDL_Color() ) );
  51 }
  52
  53 void Font::drawLeft( Canvas* canvas, Vec2 pt,
  54                      const std::string& text, int colour ) const
  55 {
  56   Canvas* temp = renderFont(text, colour);
  57   canvas->drawImage(temp, pt.x, pt.y);
  58   delete temp;
  59 }
  60
  61 void Font::drawCenter( Canvas* canvas, Vec2 pt,
  62                        const std::string& text, int colour ) const
  63 {
  64   drawLeft( canvas, pt - metrics(text)/2, text, colour );
  65 }
  66
  67 void Font::drawWrap( Canvas* canvas, Rect area,
  68                      const std::string& text, int colour ) const
  69 {
  70   Vec2 pos = area.tl;
  71   size_t i = 0, e=0;
  72   while ( i < text.length() ) {
  73     e = text.find_first_of(" \n\r\t",i);
  74     if ( i == e ) {
  75       i++;
  76     } else {
  77       std::string word = text.substr(i,i+e);
  78       Vec2 wm = metrics( word );
  79       if ( pos.x + wm.x > area.br.x ) {
  80         pos.x = area.tl.x;
  81         pos.y += wm.y;
  82       }
  83       drawLeft( canvas, pos, word, colour );
  84       i = e + 1;
  85     }
  86   }
  87   drawLeft( canvas, pos, text.substr(i), colour );
  88 }
  89
  90
  91 const Font* Font::titleFont()
  92 {
  93   static Font* f = new Font("femkeklaver.ttf",36);
  94   return f;
  95 }
  96
  97 const Font* Font::headingFont()
  98 {
  99   static Font* f = new Font("femkeklaver.ttf",24);
 100   return f;
 101 }
 102
 103 const Font* Font::blurbFont()
 104 {
 105   static Font* f = new Font("femkeklaver.ttf",16);
 106   return f;
 107 }
 108