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Displaying image in SDL

 
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plysek



Joined: 16 Feb 2009
Posts: 7
PostPosted: Mon Feb 23, 2009 9:22 am    Post subject: Displaying image in SDL Reply with quote
This simple program should display an image:
Code:

#include <SDL/SDL.h>                                                                                                                                                   
#include <pspdebug.h>                                                                                                                                                 
#include <pspkernel.h>                                                                                                                                                 
#define SCREEN_WIDTH 480                                                                                                                                               
#define SCREEN_HEIGHT 272                                                                                                                                             

PSP_MODULE_INFO("Przykladowa aplikacja SDL", 0, 1, 1);
PSP_HEAP_SIZE_KB(20480);                             
PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_USER|PSP_THREAD_ATTR_VFPU);

#define printf pspDebugScreenPrintf
int exit_callback( int arg1, int arg2, void *common )
{                                                   
        sceKernelExitGame( );                       
        return 0;                                   
}                                                   

int CallbackThread( SceSize args, void *argp )
{                                             
        int cbid;                             
        cbid = sceKernelCreateCallback( "Exit Callback", exit_callback, NULL );
        sceKernelRegisterExitCallback( cbid );                                 
        sceKernelSleepThreadCB( );                                             
        return 0;                                                             
}                                                                             

int SetupCallbacks( void )
{                         
        int thid = 0;     
        thid = sceKernelCreateThread( "update_thread", CallbackThread, 0x11, 0xFA0, 0, 0 );
        if(thid >= 0)                                                                     
        {                                                                                 
                sceKernelStartThread( thid, 0, 0 );                                       
        }                                                                                 
        return 0;                                                                         
}                                                                                         




int InitVideo( )
{               
         if (SDL_Init( SDL_INIT_VIDEO ) != 0)
         {                                   
                printf( "SDL_Init(): %s\n", SDL_GetError() );
                SDL_Quit( );                                 
                return 1;
         } else return 0;
}

int main( int argc, char **argv )
{
        pspDebugScreenInit( );
        SetupCallbacks( );

        SDL_Surface *screen;
        screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, 32, SDL_FULLSCREEN | SDL_DOUBLEBUF | SDL_HWSURFACE );

        SDL_Surface *image;
        SDL_Surface *temp;

        temp = SDL_LoadBMP( "image.bmp" );
        if( temp == NULL )
        {
                printf( "SDL_LoadBMP(): %s\n", SDL_GetError( ) );
        }

        image = SDL_DisplayFormat( temp );

        if( image == NULL )
        {
                printf( "SDL_DisplayFormat( ): %s\n", SDL_GetError( ) );
        }

        SDL_FreeSurface( temp );

        SDL_Rect src, dest;

        src.x = 0;
        src.y = 0;
        src.w = image->w;
        src.h = image->h;

        dest.x = 100;
        dest.y = 100;
        dest.w = image->w;
        dest.h = image->h;

        SDL_Flip( screen );
        SDL_Delay( 2500 );

        SDL_FreeSurface( image );

        return 0;
}


i have modified the code from SDL wiki, but it doesnt work. Why?

Here is my makefile:
Code:

TARGET = hello
OBJS = sdl.o

CFLAGS = -O2 -G0 -Wall
CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
ASFLAGS = $(CFLAGS)

EXTRA_TARGETS = EBOOT.PBP
LIBS = -lSDL -lGL -lz -lpng -lm -ljpeg -lpsppower_driver -lpspvfpu -lpsphprm -lpsprtc -lpspaudio -lpspgu -lpspirkeyb -lpsppower
PSP_EBOOT_TITLE = Test SDL

PSPSDK=$(shell psp-config --pspsdk-path)
include $(PSPSDK)/lib/build.mak


and the image.bmp:
http://lysek.y0.pl/image.bmp
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plysek



Joined: 16 Feb 2009
Posts: 7
PostPosted: Mon Feb 23, 2009 9:31 am    Post subject: Reply with quote
hmm i forgot to init the video, but still it doesnt show the image...
ekhm ok i did now the SDL_BlitSurface( image, NULL, screen, &src);
and it works! but he problem that it waits a moment with the image displayed and then psp power off automaticly, and i can even push home to exit, why is that?
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Wally



Joined: 26 Sep 2005
Posts: 672
PostPosted: Mon Feb 23, 2009 9:43 am    Post subject: Reply with quote
plysek wrote:
hmm i forgot to init the video, but still it doesnt show the image...
ekhm ok i did now the SDL_BlitSurface( image, NULL, screen, &src);
and it works! but he problem that it waits a moment with the image displayed and then psp power off automaticly, and i can even push home to exit, why is that?


Sounds like a bus error.. I suggest setting PSPLink up will fix it
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plysek



Joined: 16 Feb 2009
Posts: 7
PostPosted: Tue Feb 24, 2009 1:42 am    Post subject: Reply with quote
it doesnt work on my psp, i have 5.0m33-3 slim it says with v1.0 "The game could not be started" and with v1.5 and v1.5_nocorrupt it is corrupted data.
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J.F.



Joined: 22 Feb 2004
Posts: 2906
PostPosted: Tue Feb 24, 2009 5:27 pm    Post subject: Reply with quote
You have to use psplinkusb with the Slim.
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