SDL static background

[chris200x9]

I am just learning SDL, after reading the wiki I get this
#include "stdio.h"
#include "SDL/SDL.h"

int main(int argc, char *argv[])
{
SDL_Surface *screen; //This pointer will reference the backbuffer
SDL_Surface *image; //This pointer will reference our bitmap sprite
SDL_Surface *temp; //This pointer will temporarily reference our bitmap sprite
SDL_Rect src, dest; //These rectangles will describe the source and destination regions of our blit

//We must first initialize the SDL video component, and check for success
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}

//When this program exits, SDL_Quit must be called
atexit(SDL_Quit);

//Set the video mode to fullscreen 640x480 with 16bit colour and double-buffering
screen = SDL_SetVideoMode(640, 480, 16, SDL_DOUBLEBUF);
if (screen == NULL) {
printf("Unable to set video mode: %s\n", SDL_GetError());
return 1;
}

//Load the bitmap into a temporary surface, and check for success
temp = SDL_LoadBMP("image.bmp");
if (temp == NULL) {
printf("Unable to load bitmap: %s\n", SDL_GetError());
return 1;
}

//Convert the surface to the appropriate display format
image = SDL_DisplayFormat(temp);

//Release the temporary surface
SDL_FreeSurface(temp);

//Construct the source rectangle for our blit
src.x = 0;
src.y = 0;
src.w = image->w; //Use image->w to display the entire width of the image
src.h = image->h; //Use image->h to display the entire height of the image

//Construct the destination rectangle for our blit
dest.x = 100; //Display the image at the (X,Y) coordinates (100,100)
dest.y = 100;
dest.w = image->w; //Ensure the destination is large enough for the image's entire width/height
dest.h = image->h;

//Blit the image to the backbuffer
SDL_BlitSurface(image, &src, screen, &dest);

//Flip the backbuffer to the primary
SDL_Flip(screen);

//Wait for 2500ms (2.5 seconds) so we can see the image
SDL_Delay(2500);

//Release the surface
SDL_FreeSurface(image);

//Return success!
return 0;
}


how do I create a static background that just stays there instead of disapearing after 2.5 seconds?

[Simian Man]

You need to make an event loop that waits for the user to quit:


#include "stdio.h"
#include "SDL/SDL.h"

int main(int argc, char *argv[])
{
SDL_Surface *screen; //This pointer will reference the backbuffer
SDL_Surface *image; //This pointer will reference our bitmap sprite
SDL_Surface *temp; //This pointer will temporarily reference our bitmap sprite
SDL_Rect src, dest; //These rectangles will describe the source and destination regions of our blit

//We must first initialize the SDL video component, and check for success
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}

//When this program exits, SDL_Quit must be called
atexit(SDL_Quit);

//Set the video mode to fullscreen 640x480 with 16bit colour and double-buffering
screen = SDL_SetVideoMode(640, 480, 16, SDL_DOUBLEBUF);
if (screen == NULL) {
printf("Unable to set video mode: %s\n", SDL_GetError());
return 1;
}

//Load the bitmap into a temporary surface, and check for success
temp = SDL_LoadBMP("temp.bmp");
if (temp == NULL) {
printf("Unable to load bitmap: %s\n", SDL_GetError());
return 1;
}

//Convert the surface to the appropriate display format
image = SDL_DisplayFormat(temp);

//Release the temporary surface
SDL_FreeSurface(temp);

//Construct the source rectangle for our blit
src.x = 0;
src.y = 0;
src.w = image->w; //Use image->w to display the entire width of the image
src.h = image->h; //Use image->h to display the entire height of the image

//Construct the destination rectangle for our blit
dest.x = 100; //Display the image at the (X,Y) coordinates (100,100)
dest.y = 100;
dest.w = image->w; //Ensure the destination is large enough for the image's entire width/height
dest.h = image->h;


// main game loop
SDL_Event event;
int playing = 1;

while(playing) {
while(SDL_PollEvent(&event)) {
if(event.type == SDL_QUIT)
playing = 0;
}

//Blit the image to the backbuffer
SDL_BlitSurface(image, &src, screen, &dest);

//Flip the backbuffer to the primary
SDL_Flip(screen);
}


//Release the surface
SDL_FreeSurface(image);

//Return success!
return 0;
}


You can also handle other types events besides SDL_QUIT such as keyboard, mouse, joystick and so on.

[chris200x9]

thank you! :)