Trouble with TTFs

This is a discussion on Trouble with TTFs within the Game Programming forums, part of the General Programming Boards category; This line of code is crashing my game. If I comment it everything else runs smooth, but of course no ...

  1. #1
    Bored Programmer
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    Trouble with TTFs

    This line of code is crashing my game. If I comment it everything else runs smooth, but of course no text is displayed when needed.

    Code:
    SDL_Surface *linea = NULL;
    ....
    ....
    int main()
    {
    linea = TTF_RenderText_Solid( font, "Welcome to my shop we have 6 weapons", textColor );
    }
    any ideas?
    Last edited by Lesshardtofind; 07-23-2009 at 03:55 AM.

  2. #2
    Webhead Spidey's Avatar
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    any ideas?
    Are you sure the font is valid ?
    Also, you are supposed to free the surface after blitting it.

    SDL_ttf 2.0.7: TTF_RenderText_Solid

  3. #3
    C++11 User Tux0r's Avatar
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    Quote Originally Posted by Spidey View Post
    Also, you are supposed to free the surface after blitting it.
    Yup

    Code:
    SDL_FreeSurface(linea);
    linea = TTF_RenderText_Solid( font, "Welcome to my shop we have 6 weapons", textColor );

  4. #4
    Bored Programmer
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    Yes the font is valid and in the same directory as the project. And I already free all the surfaces in the program at the end with a freeallsurfaces(); function.
    The program doesn't get that far. Let me post a little more code maybe someone will know the problem then.

    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <SDL/SDL.h>
    #include <windows.h>
    #include <string>
    #include <SDL/SDL_image.h>
    #include <SDL/SDL_ttf.h>
    
    SDL_Surface *screen = NULL;
    SDL_Surface *background = NULL;
    SDL_Surface *character = NULL;
    SDL_Surface *town = NULL;
    SDL_Surface *weapshoptemp = NULL;
    SDL_Surface *rustysword = NULL;
    SDL_Surface *bronzesword = NULL;
    SDL_Surface *plasmasword = NULL;
    SDL_Surface *platinumsword = NULL;
    SDL_Surface *silversword = NULL;
    SDL_Surface *bdiamondsword = NULL;
    SDL_Surface *linea = NULL;
    SDL_Color textColor = { 255, 255, 255 };
    SDL_Event event;
    TTF_Font *font = NULL;
    
    int location =2;
    
    int initsdl()
    {
        /* Initialize SDL */
        if (SDL_Init (SDL_INIT_EVERYTHING) == -1)
        {
            return 1;
        }
        
    
        /* Set 640x480 16-bits video mode */
        screen = SDL_SetVideoMode (640, 480, 16, SDL_SWSURFACE |     
        SDL_DOUBLEBUF);
    
        if (screen == NULL)
        {
            return 1;
        }
        if( TTF_Init() == -1 )
        {
            return false;    
        }
        SDL_WM_SetCaption ("Starting with physics", NULL);
    }
    
    int freesurfaces()
    {
        SDL_FreeSurface(background);
        SDL_FreeSurface(screen);
        SDL_FreeSurface(character);
        SDL_FreeSurface(rustysword);
        SDL_FreeSurface(bronzesword);
        SDL_FreeSurface(silversword);
        SDL_FreeSurface(plasmasword);
        SDL_FreeSurface(platinumsword);
        SDL_FreeSurface(bdiamondsword);
        SDL_FreeSurface(linea);
    }
    
    void loadimages()
    {
         character = loadimage("ani.gif");
         rustysword = loadimage("rustysword.png");
         bronzesword = loadimage("bronzesword.png");
         silversword = loadimage("silversword.png");
         plasmasword = loadimage("plasmasword.png");
         platinumsword = loadimage("platinumsword.png");
         bdiamondsword = loadimage("bluediamondsword.png");
         font = TTF_OpenFont( "achafsex.ttf", 28 );
    }
    
    void displayarea()
    {
         //1 is town
         if(location == 1)
         {
           background = loadimage("town.png");          
           applysurface(0,0, background, screen, NULL);
           applysurface(x, y, character, screen, &animation[1]);
         }
         else if(location == 2)
         {
           background = loadimage("shop.png");          
           applysurface(0,0, background, screen, NULL);
           applysurface(10,70, rustysword, screen, NULL);
           applysurface(310,70, bronzesword, screen, NULL);
           applysurface(10, 140, silversword, screen, NULL);
           applysurface(310, 140, platinumsword, screen, NULL);
           applysurface(10, 210, bdiamondsword, screen, NULL);
           applysurface(310, 210, plasmasword, screen, NULL);
         }
    }
    
    void play()
    {
      int MouseCoordX, MouseCoordY;
      displayarea();
      bool quit = false;
      while(quit == false)
      {
        while(SDL_PollEvent(&event))
        {
          displayarea();                          
          if(event.type == SDL_QUIT)
          {
            quit = true;
          }
          else if(location == 1)
          {
            if( event.type == SDL_KEYDOWN )
            {
              switch( event.key.keysym.sym ) 
              { 
                case SDLK_UP: moveup();
                break;  
                case SDLK_LEFT: moveleft(); 
                break; 
                case SDLK_RIGHT: moveright();
                break;
                case SDLK_DOWN: movedown(); 
              } 
            }
          }
          else if(location == 2)
          {
             if(event.type == SDL_MOUSEBUTTONDOWN)
             {
               if(event.button.button == SDL_BUTTON_LEFT)
               {
                 MouseCoordX = event.button.x;
                 MouseCoordY = event.button.y;
                 SDL_FreeSurface(linea);
                 //if I comment the following line the program runs else it stops and     
                 does not even apply the line applysurface that follows it.
                 linea = TTF_RenderText_Solid( font, "Welcome to my shop we have 6             weapons", textColor );
                 applysurface(MouseCoordX, MouseCoordY, linea, screen, NULL);
               }
             }
          }     
          SDL_Flip(screen);
        }
      }  
    }
    
    int main (int argc, char *argv[])
    {
      initsdl();
      loadimages(); 
      play();
      freesurfaces();
      return 0;
    }
    sorry I know its long, but it was the shortest version of the real code I could copy paste and still give you an idea of whats goin on

  5. #5
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    UPDATE: I made the smallest program possible to print ttfs and it still crashed at the same line of code. I found this error message in a notepad file outside the program. Fatal signal: Segmentation Fault (SDL Parachute Deployed)

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