sdl blitting

ok im using this tutorial

http://lazyfooproductions.com/SDL_tu...on02/index.php


i have it set SDL installed fully i even downloaded to source for this but it still wont work,the screen goes up but its completely black! this is so annoying


wait do the contents of the sdl folders have to be emptied into into the dev-cpp folder or can i just leave them in the folders and compy the folders?

Post your code. Assuming you're using the exact code that the tutorial provides:

Code:

---

/*This source code copyrighted by Lazy Foo' Productions (2006) and may not be redestributed without written permission.*/

//The headers
#include "SDL/SDL.h"
#include <string>

//The attributes of the screen
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

//The surfaces that will be used
SDL_Surface *message = NULL;
SDL_Surface *background = NULL;
SDL_Surface *screen = NULL;

SDL_Surface *load_image( std::string filename )
{
    //Temporary storage for the image that's loaded
    SDL_Surface* loadedImage = NULL;
   
    //The optimized image that will be used
    SDL_Surface* optimizedImage = NULL;
   
    //Load the image
    loadedImage = SDL_LoadBMP( filename.c_str() );
   
    //If nothing went wrong in loading the image
    if( loadedImage != NULL )
    {
        //Create an optimized image
        optimizedImage = SDL_DisplayFormat( loadedImage );
       
        //Free the old image
        SDL_FreeSurface( loadedImage );
    }
   
    //Return the optimized image
    return optimizedImage;
}

void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination )
{
    //Make a temporary rectangle to hold the offsets
    SDL_Rect offset;
   
    //Give the offsets to the rectangle
    offset.x = x;
    offset.y = y;
   
    //Blit the surface
    SDL_BlitSurface( source, NULL, destination, &offset );
}

int main( int argc, char* args[] )
{
    //Initialize all SDL subsystems
    if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
    {
        return 1;   
    }
   
    //Set up the screen
    screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );
   
    //If there was in error in setting up the screen
    if( screen == NULL )
    {
        return 1;   
    }
   
    //Set the window caption
    SDL_WM_SetCaption( "Hello World", NULL );
   
    //Load the images
    message = load_image( "hello_world.bmp" );
    background = load_image( "background.bmp" );
   
    //Apply the background to the screen
    apply_surface( 0, 0, background, screen );
   
    //Apply the message to the screen
    apply_surface( 180, 140, message, screen );
   
    //Update the screen
    if( SDL_Flip( screen ) == -1 )
    {
        return 1;   
    }
   
    //Wait 2 seconds
    SDL_Delay( 2000 );
   
    //Free the surfaces
    SDL_FreeSurface( message );
    SDL_FreeSurface( background );
   
    //Quit SDL
    SDL_Quit();
   
    return 0;   
}

---

You must not be compiling it properly if the code above produces a black screen. (Or maybe the images loaded in the code don't exist or something.) You might want to read the part of the tutorial that covers this: http://lazyfooproductions.com/SDL_tu...on01/index.php

actually ive done everything needed...ive even made a folder and put the code and images in it :(

i have it at empty project

project options>the gui one>parameters>-lmingw32 -lSDLmain -lSDL


and ive just checked over the cotnents of my dev-cpp folders to make sure sdl is installed correctly..i get nothing ill read over the images part again it might help

With my very old version of Dev-C++, I actually had to add -lSDL.dll in (otherwise I got a black screen!), and the order of them mattered. I used

Code:

---

-lSDL.dll -lSDL -lSDLmain

---

[edit] The images have to be in the same directory as the executable. [/edit]

thanks!!!!! hmm well while im at it might as well check to see if my dev is old


EDIT:IT WORKED!!!!! im blitting ,IM BLITTING


thanks i dont know why it didnt work before!

well i suppose i should really break down the code (shouldnt take more than an hour)

but thank you so much! now i just need to worry about the problems ill face in the other tutorials....YOU ARE god ...atleast at SDL