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Keskustelu: Ohjelmointikysymykset: C++: SDL_ttf

DumTom [10.04.2013 18:25:51]

#

#ifdef __cplusplus
    #include <cstdlib>
#else
    #include <stdlib.h>
#endif

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <SDL/SDL_mixer.h>
#include <SDL/SDL_rotozoom.h>
#include <SDL/SDL_rotozoom.h>	// SDL_gfx Rotozoom
#include <SDL/SDL_gfxPrimitives.h>// SDL_gfx Primitives
#include <SDL/SDL_framerate.h>
#include <SDL/SDL_ttf.h>

Mix_Chunk *sound;
TTF_Font *font = NULL;

//The color of the font
int main ( int argc, char** argv )
{
    // initialize SDL video
    if ( SDL_Init( SDL_INIT_EVERYTHING ) < 0 )
    {
        printf( "Unable to init SDL: %s\n", SDL_GetError() );
        return 1;
    }

    // make sure SDL cleans up before exit
    atexit(SDL_Quit);
if( TTF_Init() == -1 )
    {
        return false;
    }

    // create a new window
    SDL_Surface* screen = SDL_SetVideoMode(640, 480, 16,
                                           SDL_HWSURFACE|SDL_DOUBLEBUF);
    if ( !screen )
    {
        printf("Unable to set 640x480 video: %s\n", SDL_GetError());
        return 1;
    }
if (Mix_OpenAudio(44100, AUDIO_S16SYS, 2, 4096) < 0) exit(0);
Mix_AllocateChannels(16);
sound=Mix_LoadWAV("ballout.wav");
font = TTF_OpenFont( "arial.ttf", 28 );
        SDL_Surface *imgTxt ; // Store image of the text for blit
SDL_Rect txtRect ; // Store (x,y) of text for blit
SDL_Color fColor ; // Font color (R,G,B)

    //If there was a problem in loading the background
    //If there was an error in loading the font
    if( font == NULL )
    {
        return false;
    }
    // load an image
    Mix_PlayChannel(-1,sound,0);
    SDL_Color textColor = { 255, 255, 255 };

    SDL_Surface* bmp =IMG_Load("cb.png");
    if (!bmp)
    {
        printf("Unable to load bitmap: %s\n", SDL_GetError());
        return 1;
    }

    // centre the bitmap on screen
    SDL_Rect dstrect;
    dstrect.x = (screen->w - bmp->w) / 2;
    dstrect.y = (screen->h - bmp->h) / 2;

    // program main loop
    bool done = false;
    while (!done)
    {
        // message processing loop
        SDL_Event event;
        while (SDL_PollEvent(&event))
        {
            // check for messages
            switch (event.type)
            {
                // exit if the window is closed
            case SDL_QUIT:
                done = true;
                break;

                // check for keypresses
            case SDL_KEYDOWN:
                {
                    // exit if ESCAPE is pressed
                    if (event.key.keysym.sym == SDLK_ESCAPE)
                        done = true;
                    break;
                }
            } // end switch
        } // end of message processing

        // DRAWING STARTS HERE

        // clear screen
        SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));

        // draw bitmap
        SDL_BlitSurface(bmp, 0, screen, &dstrect);

        // DRAWING ENDS HERE
        Uint32 g_Color;
        g_Color=SDL_MapRGB(screen->format,255,255,255);
         boxColor(screen, 100, 0, 300, 300,g_Color);
        // finally, update the screen

txtRect.x = 100;
txtRect.y = 200;
fColor.r = fColor.g = fColor.b = 245; // Set font to white color
imgTxt = TTF_RenderText_Solid( font , "SDL_ttf Test : Load & Display Font" , fColor );
        SDL_Flip(screen);
    } // end main loop

    // free loaded bitmap
    SDL_FreeSurface(bmp);
    Mix_FreeChunk(sound);

    // all is well ;)
    printf("SDL_gfx: %s\n", rotozoomSurface ? "ok!" : "WTF?");
    printf("Exited cleanly\n");

    return 0;
}

[koodicpp]

Tällä koodilla olen testaillut mutta ihmettelen miksei ttf fontit tulostu?

nomic [10.04.2013 18:45:40]

#

Et ole komentanut ohjelmaa piirtämään pintaa (jossa teksti olisi) mihinkään. Eli ennen kuin kuva flipataan, pitäisi sen saada tietää mihin moinen pinta tulee.

DumTom [10.04.2013 20:53:06]

#

kiitos

Vastaus

Aihe on jo aika vanha, joten et voi enää vastata siihen.

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