SDL_ttf Example

// text.h#if !defined(_TEXT_H_INCLUDED_)#define _TEXT_H_INCLUDED_#include <string>#include <stdio.h>#include <stdlib.h>#include <SDL/SDL.h>#include <SDL/SDL_ttf.h>using namespace std;namespace System{namespace Text{	// DefaultFont - The default font to use.	//  Optionally set this after you have loaded all required fonts	extern std::string DefaultFont;	bool Initialize();	void Close();	// LoadFont - Loads a font into memory	//  Key - What you'll refer to the font as when using it (the name)	//  Filename - The filename of the font	//  FontSize - The size of the font	// Example:  LoadFont("bigfont","arial.ttf",72)	bool LoadFont(std::string key, std::string filename, int fontSize=16);	// CloseFont - Closes the font (not required as it is managed)	void CloseFont(std::string key);	// FontHeight - Returns the height of the font	int FontHeight(std::string key);	// Print - Prints on the screen	//  x, y - The location to print	//  text - The text to write	//  r, g, b - The colour to paint	//  hAlignment - 0=left, 1=center, 2=right	//  vAlignment - 0=top, 1=center, 2=bottom	//  fontKey - The font to use (the name)	// Example: Print(40, 40, "Hi", 255,0,0, 1, 1, "bigfont"	bool Print(int x = 0, int y = 0, std::string text = "Hello World", int r = 255, int g = 255, int b = 255, int halign = 0, int valign = 0, std::string fontKey = "default");}}#endif // _TEXT_H_INCLUDED_

// text.cpp#include "text.h"#include <stdio.h>#include <stdlib.h>#include <SDL/SDL.h>#include <SDL/SDL_ttf.h>#include <map>#include <fstream>#include <vector>using namespace std;namespace System{	extern SDL_Surface *Screen;	extern int CameraX;	extern int CameraY; namespace Text{	std::string DefaultFont;	map<string, TTF_Font*> m_Fonts;	typedef map<string, TTF_Font*>::iterator FontIterator;	TTF_Font* GetFont(std::string key){		FontIterator pos = m_Fonts.find(key);		if (pos == m_Fonts.end()) return NULL;		return pos->second;	}	void CloseFont(TTF_Font* font){		if(font != NULL){			TTF_CloseFont(font);			font = NULL;		}	}	void CloseFont(std::string key){		CloseFont(GetFont(key));		FontIterator pos = m_Fonts.find(key);		if (pos == m_Fonts.end()) return;		m_Fonts.erase(pos);	}	bool Initialize(){		if(TTF_Init() == -1)			return false;		return true;	}	void Close(){		for(FontIterator pos = m_Fonts.begin(); pos != m_Fonts.end(); ++pos){			CloseFont(pos->second);    	}		TTF_Quit();	}	bool LoadFont(std::string key, std::string filename, int fontSize){		fstream fin; 		fin.open(filename.c_str(),ios::in);		if(fin.is_open()){ // Check if the file exists			fin.close();			TTF_Font* font = TTF_OpenFont(filename.c_str(), fontSize);			if(font == NULL){				printf("TTF_OpenFont: %s\n", TTF_GetError());				return false;			}			m_Fonts[key] = font;			DefaultFont = key;			return true;		}		fin.close();		return false;	}	SDL_Surface* MakeTextSurface(std::string text, TTF_Font* font, int r, int g, int b){		SDL_Surface* txtSurface;		SDL_Color colour = {r,g,b,0};		if(!(txtSurface = TTF_RenderText_Solid(font,text.c_str(), colour))){			printf("TTF_Print: %s\n", TTF_GetError());			if(txtSurface != NULL)				SDL_FreeSurface(txtSurface);			return NULL;		}		return txtSurface;	}	int FontHeight(std::string key){		TTF_Font *font = GetFont(key);		if(font != NULL) return TTF_FontHeight(font);		return 0;	}	bool Print(int x, int y, std::string text, int r, int g, int b, int halign, int valign, std::string fontKey){		/*			FIND THE FONT		*/		TTF_Font* FontTTF;		if(fontKey == "default")			FontTTF = GetFont(DefaultFont);		else			FontTTF = GetFont(fontKey);		if(FontTTF == NULL){ // Choose any font if there isn't a default			for(FontIterator pos = m_Fonts.begin(); pos != m_Fonts.end(); ++pos){				FontTTF = GetFont(pos->first);				if(FontTTF != NULL)					break;	    	}		}		if(FontTTF == NULL)	return false; // exit if there isn't font		// Create the surface and paint		SDL_Surface* txtSurface = MakeTextSurface(text, FontTTF,r,g,b);		if(txtSurface != NULL){			SDL_Rect dest; 			switch(halign){			case 1: // Center				dest.x = x - (int)(txtSurface->w/2); 				break; 			case 2: // Right				dest.x = x - (int)txtSurface->w;				break;			default: // Left		    	dest.x = x;			}			switch(valign){			case 1: // Center				dest.y = y - (int)(txtSurface->h/2);				break;			case 2: // Bottom				dest.y = y - (int)txtSurface->h;				break;			default: // Top				dest.y = y;			}			dest.x -= System::CameraX;			dest.y -= System::CameraY;		    SDL_BlitSurface(txtSurface, NULL, System::Screen, &dest);			SDL_FreeSurface(txtSurface);			return true;		} else {			return false;		}	}	}}