App locks while using SDL_tff...?

Author

172

January 18, 2005 07:47 PM

Hi, For some reason when I run this code it freezes the app. I checked the documentation and it says the code is right. Here have a look for yourself.


//Font
TTF_Font *fntarial=TTF_OpenFont("font/font1.ttf", 12);
SDL_Color fg = {0,0,255};  // Blue ("Fg" is foreground)
SDL_Surface *sText = TTF_RenderText_Solid( fntarial, "SFFKT!!!", fg );
draw(50,50,sText,Menu);

I dont understand it. If it checks with the documentation, why wont it work?

Mark St. Jean - OwnerWastedInkVwmaggotwV@Yahoo.com

rtw1701

114

January 18, 2005 09:03 PM

Code seams fine to me too. Had you used this font before? Maybe try a different font size too.

Thrust

Author

172

January 19, 2005 08:33 AM

I will post my full code when I get home. Maby its where I impliment the code.

Mark St. Jean - OwnerWastedInkVwmaggotwV@Yahoo.com

Thrust

Author

172

January 19, 2005 02:27 PM

#include <iostream>#include <stdlib.h>#include <winsock2.h>#include <SDL/SDL.h> #include <sdl_ttf.h>//Globalsint map [20][25]= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                   0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,                    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};//Functionsvoid drawMap();void drawScene();void Jump(void);void FallDown(void);void HandleJump(void);void HandleFall(void);void PushUp(void);void PullDown(void);void drawTitle();void mainMenu();void game();//draws bitmaps, x = o is top, y = 0 is left, sprite is the imagevoid draw(int x, int y, SDL_Surface *sprite, SDL_Surface *screen);//SurfacesSDL_Surface *Menu;SDL_Surface *tilemap;//SpriteSDL_Surface *sprite1 = SDL_LoadBMP("gfx/sprites/hentai1.bmp");SDL_Surface *sprite2 = SDL_LoadBMP("gfx/sprites/eye1.bmp");SDL_Surface *cloud = SDL_LoadBMP("gfx/tiles/cloud.bmp");SDL_Surface *sun = SDL_LoadBMP("gfx/tiles/sun.bmp");//TilesSDL_Surface *tile1 = SDL_LoadBMP("gfx/tiles/tile1.bmp");SDL_Surface *tile2 = SDL_LoadBMP("gfx/tiles/tile2.bmp");SDL_Surface *grass1 = SDL_LoadBMP("gfx/tiles/grass1.bmp");//GUISDL_Surface *main1 = SDL_LoadBMP("gfx/gui/main1.bmp");SDL_Surface *main2 = SDL_LoadBMP("gfx/gui/main2.bmp");SDL_Surface *main3 = SDL_LoadBMP("gfx/gui/main3.bmp");//FontTTF_Font *fntarial=TTF_OpenFont("font/font1.ttf", 12);SDL_Color fg = {0,0,255};  // Blue ("Fg" is foreground)SDL_Surface *sText = TTF_RenderText_Solid( fntarial, "SFFKT!!!", fg );//struct Playertypedef struct Player {int x_pos;int y_pos;int x_vel;int y_vel;bool jump;bool inair;}Player;//for GUItypedef struct button {int x_pos;int y_pos;}button;Player p1;Player p2;//for the first playerint spriteh = 53;int spritew = 74;button JoinButton;button HostButton;//------------------------------------------------------------------------------using namespace std;int main(int argc, char *argv[]){  mainMenu();  return 0;}//------------------------------------------------------------------------------------//Draws stuff to the screenvoid draw(int x, int y, SDL_Surface *sprite, SDL_Surface *screen){    SDL_Rect source;    SDL_Rect dest;    source.x = 0;    source.y = 0;    source.w = sprite->w;    source.h = sprite->h;    dest.x = x;    dest.y = y;    dest.w = source.w;    dest.h = source.h;    SDL_BlitSurface(sprite, &source, screen, &dest);    return;}//DRAWS MAP!!!void drawMap(){   int map [20][25]= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,                    0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,                    0,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,                    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};for(int y = 0;y < 20; y++){     for(int x = 0;x < 25; x++)    {        if(map[y][x] == 1)         {           draw(x*32,y*32,tile1,tilemap);         }        else if (map[y][x] == 0)         {           draw(x*32,y*32,tile2,tilemap);         }         else if (map[y][x] == 2)         {           draw(x*32,y*32,grass1,tilemap);         }    }}}//draws backgroundvoid drawScene(){  drawMap();  draw(40,40,cloud,tilemap);  draw(330,60,cloud,tilemap);  draw(670,40,sun,tilemap);  draw(40,40,cloud,tilemap);  draw(p1.x_pos, p1.y_pos, sprite1, tilemap);  draw(p2.x_pos, p2.y_pos, sprite2, tilemap);  SDL_Flip(tilemap);}//jumpsvoid Jump(void){    if (p1.jump == true)    {        return;    }    p1.jump = true;    p1.y_vel = 15;}void HandleJump(void){p1.y_pos -= p1.y_vel;p1.y_vel--;if (map[(p1.y_pos + spriteh)/32][p1.x_pos/32] == 0 && map[(p1.y_pos+spriteh)/32][(p1.x_pos + spritew)/32] == 0)       {           p1.jump = false;           p1.y_vel =-1;       }}void PushUp(void){    while(map[(p1.y_pos + spriteh)/32][p1.x_pos/32] == 0 && map[(p1.y_pos + spriteh)/32][(p1.x_pos + spritew)/32] == 0 )        p1.y_pos--;} void PullDown(void){    while(map[((p1.y_pos) + spriteh)/32][p1.x_pos/32] != 0 && map[((p1.y_pos) + spriteh)/32][(p1.x_pos + spritew)/32] != 0)       {                      p1.y_pos++;       }}void FallDown(void){    if (p1.inair == true)    {        return;    }    p1.inair = true;    p1.y_vel = -5;}void HandleFall(void){FallDown();p1.y_pos -= p1.y_vel;p1.y_vel--;if (map[((p1.y_pos) + spriteh)/32][p1.x_pos/32] != 0 && map[((p1.y_pos) + spriteh)/32][(p1.x_pos + spritew)/32] != 0)       {           p1.inair = false;           p1.y_pos +=2;       }}void drawTitle(){    HostButton.x_pos = 75;    HostButton.y_pos = 540;        JoinButton.x_pos = 521;    JoinButton.y_pos = 540;        draw(0,0,main1,Menu);    draw(50,50,sText,Menu);    draw(HostButton.x_pos,HostButton.y_pos,main2,Menu);    draw(JoinButton.x_pos,JoinButton.y_pos,main3,Menu);    SDL_Flip(Menu);}//--------------------------------------------------void game(){    p1.x_pos = 32;    p1.y_pos = 568;        p2.x_pos = 717;    p2.y_pos = 559;     Uint8* keys;       //Sets transparency    SDL_SetColorKey(sprite1, SDL_SRCCOLORKEY,     SDL_MapRGB(sprite1->format, 255, 100, 255));        SDL_SetColorKey(sprite2, SDL_SRCCOLORKEY,     SDL_MapRGB(sprite2->format, 255, 100, 255));    SDL_SetColorKey(cloud, SDL_SRCCOLORKEY,     SDL_MapRGB(cloud->format, 255, 100, 255));    SDL_SetColorKey(sun, SDL_SRCCOLORKEY,     SDL_MapRGB(sun->format, 255, 100, 255));    //boolean used to determine if the game is running    bool isRunning;    //A SDL event, used to keep gamerunning.    SDL_Event event;    //unload function    atexit(SDL_Quit);        //sets the video mode that SDL uses    // Peremiters are window width, window height,color depth, then flags    tilemap = SDL_SetVideoMode(800, 640, 0, SDL_HWSURFACE|SDL_DOUBLEBUF);    SDL_WM_SetCaption( "Super Fun Fun Kill Time!!!", 0 );     //gives the boolean a value    isRunning = true;    drawMap();        //Main game loop    while(isRunning == true)    {       if(p1.jump)       {       HandleJump();       }       else if(!p1.jump)       {       PushUp();       }       if (!p1.jump && map[((p1.y_pos+1) + spriteh)/32][p1.x_pos/32] != 0 && map[((p1.y_pos+1) + spriteh)/32][(p1.x_pos + spritew)/32] != 0 )       {       HandleFall();       }       if (p1.inair)       {       PullDown();       }       else if(!p1.inair)       {       PushUp();       }       //Poll event         SDL_PollEvent(&event);        //vent that ends SDL and main game loop       if(event.type == SDL_KEYDOWN)        {            if(event.key.keysym.sym == SDLK_ESCAPE)            isRunning = false;        }        keys = SDL_GetKeyState(NULL);       if ( keys[SDLK_UP] )       {              Jump();       }       if ( keys[SDLK_LEFT] )        {              if (map[(p1.y_pos/32)][(((p1.x_pos-2))/32)] !=0  && map[((p1.y_pos+spriteh)/32)][(((p1.x_pos-2))/32)] != 0 && map[((p1.y_pos+(spriteh/2))/32)][(((p1.x_pos-2))/32)] != 0)              {              p1.x_pos-=2;              }       }       if ( keys[SDLK_RIGHT] )              {              if (map[(p1.y_pos/32)][(((p1.x_pos+2))/32)] != 0 && map[((p1.y_pos+spriteh)/32)][(((p1.x_pos+2)+spritew)/32)] != 0 && map[((p1.y_pos+(spriteh/2))/32)][(((p1.x_pos+2)+spritew)/32)] != 0)              {              p1.x_pos+=2;              }       }         if (event.type == SDL_QUIT)       {              SDL_FreeSurface(tile1);              SDL_FreeSurface(tile2);              SDL_FreeSurface(grass1);              SDL_FreeSurface(sprite1);              SDL_FreeSurface(cloud);              SDL_FreeSurface(sun);              SDL_FreeSurface(tilemap);              isRunning = false;       }         drawScene();    }    cout << "Testing a tile map..." <<endl;  cout << "Lets hope this works." << endl;  cout << "Geebers, it did (Knew that was going to happen)"<<endl;  cout << "Now for colision." << endl;  cout << "Haha I actuially did it, woohoo!" << endl;  mainMenu();  return;}void mainMenu(){  //Used for keys    Uint8* keys;    //boolean used to determine if the game is running    bool isRunning;	    //A SDL event, used to keep gamerunning.    SDL_Event event;   //initalizes font    TTF_Init();    atexit(TTF_Quit);    //unload function    atexit(SDL_Quit);        Menu = SDL_SetVideoMode(800, 640, 0, SDL_HWSURFACE|SDL_DOUBLEBUF);    SDL_WM_SetCaption( "Super Fun Fun Kill Time!!!", 0 );     //Draws menu    drawTitle();    isRunning = true;    //Main game loop    while(isRunning == true)    {       //Poll event         SDL_PollEvent(&event);        //vent that ends SDL and main game loop 	       if(event.type == SDL_KEYDOWN)        {            if(event.key.keysym.sym == SDLK_ESCAPE)            {            isRunning = false;            }        }        keys = SDL_GetKeyState(NULL);       if ( keys[SDLK_UP] )       {       game();       }       if ( keys[SDLK_LEFT] )        {       isRunning = false;       }       if ( keys[SDLK_RIGHT] )              {       isRunning = false;       }       if ( keys[SDLK_ESCAPE] )       {       return;       }       drawTitle();    }    if (event.type == SDL_QUIT)       {              SDL_FreeSurface(main1);              SDL_FreeSurface(main2);              SDL_FreeSurface(main3);              SDL_FreeSurface(Menu);              SDL_FreeSurface(sText);              TTF_CloseFont( fntarial );              isRunning = false;       }      return ;}

Im guessing its the way that I initalize the font here

void drawTitle(){    HostButton.x_pos = 75;    HostButton.y_pos = 540;        JoinButton.x_pos = 521;    JoinButton.y_pos = 540;        draw(0,0,main1,Menu);    draw(50,50,sText,Menu);    draw(HostButton.x_pos,HostButton.y_pos,main2,Menu);    draw(JoinButton.x_pos,JoinButton.y_pos,main3,Menu);    SDL_Flip(Menu);}void mainMenu(){  //Used for keys    Uint8* keys;    //boolean used to determine if the game is running    bool isRunning;	    //A SDL event, used to keep gamerunning.    SDL_Event event;   //initalizes font    TTF_Init();    atexit(TTF_Quit);    //unload function    atexit(SDL_Quit);        Menu = SDL_SetVideoMode(800, 640, 0, SDL_HWSURFACE|SDL_DOUBLEBUF);    SDL_WM_SetCaption( "Super Fun Fun Kill Time!!!", 0 );     //Draws menu    drawTitle();    isRunning = true;    //Main game loop    while(isRunning == true)    {       //Poll event         SDL_PollEvent(&event);        //vent that ends SDL and main game loop 	       if(event.type == SDL_KEYDOWN)        {            if(event.key.keysym.sym == SDLK_ESCAPE)            {            isRunning = false;            }        }        keys = SDL_GetKeyState(NULL);       if ( keys[SDLK_UP] )       {       game();       }       if ( keys[SDLK_LEFT] )        {       isRunning = false;       }       if ( keys[SDLK_RIGHT] )              {       isRunning = false;       }       if ( keys[SDLK_ESCAPE] )       {       return;       }       drawTitle();    }    if (event.type == SDL_QUIT)       {              SDL_FreeSurface(main1);              SDL_FreeSurface(main2);              SDL_FreeSurface(main3);              SDL_FreeSurface(Menu);              SDL_FreeSurface(sText);              TTF_CloseFont( fntarial );              isRunning = false;       }      return ;}

For some reason when I compile it locks up with a black screen. Its annoying and I wish it would just work already.

Mark St. Jean - OwnerWastedInkVwmaggotwV@Yahoo.com

TravisWells

276

January 21, 2005 04:55 PM

TTF_OpenFont is basicly broken. If opening the file fails for whatever reason, it dereferences a null pointer multiple times. I suggest rewriting your loading code like this:

TTF_Font *fntarial;SDL_RWops *rw=SDL_RWFromFile("font/font1.ttf");if(!rw){  printf("Error opening font: %s\n",SDL_GetError());  return 0;}else{  fntarial=TTF_OpenFontRW(rw, 1,12);  if(!fntarial){    printf("Error loading font: %s\n",SDL_GetError());    return 0;  }}

(I submitted a patch to fix this bug months ago, but it still hasn't been updated)

EDIT: Whoops, looked closer. You're loading BMPs and fonts outside of a function. That's not good, as the order of initialization is not defined (but it will be BEFORE main(), which is bad. main() does special magic in SDL)

So you're loading fonts and BMPs before SDL or SDL_TTF is started. That's probably the problem.

Drew_Benton

1,865

January 21, 2005 07:54 PM

I believe your problem is not with SDL_ttf, but with the way the app works. Now correct me if I'm wrong, but you never make a call to SDL_Init()
Try adding this in:

    SDL_Init(SDL_INIT_EVERYTHING);

So it looks like this:

    SDL_Init(SDL_INIT_EVERYTHING);    //initalizes font    TTF_Init();    atexit(TTF_Quit);    //unload function    atexit(SDL_Quit);

This goes with what exactly TravisWells said at the end of his post:

Quote:

(I submitted a patch to fix this bug months ago, but it still hasn't been updated)

EDIT: Whoops, looked closer. You're loading BMPs and fonts outside of a function. That's not good, as the order of initialization is not defined (but it will be BEFORE main(), which is bad. main() does special magic in SDL)

So you're loading fonts and BMPs before SDL or SDL_TTF is started. That's probably the problem.

App locks while using SDL_tff...?

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