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SDL: Load an optimised image to a surface

A function to load and optimise an image.

Submitted By: gabehabe

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Views: 533

Language: C++

Last Modified: July 11, 2008

Instructions: Pass the file path to the function :) | If you have SDL_Image stuff to load other file types, replace SDL_LoadBMP with IMG_Load and #include (example shown in the code)

Snippet

#include <SDL/SDL.h>
/* Function to load and return an optimised image
* using the SDL graphics libraries
* author: Danny Battison
* contact: gabehabe@hotmail.com
*/
SDL_Surface *Load_Optimal (char *filename)
{
SDL_Surface *loaded = NULL; /* The surface to load the basic image */
SDL_Surface *optimal = NULL; /* The optimised surface */
loaded = SDL_LoadBMP (filename); /* Load the basic image */
if (loaded != NULL) /* This is why NULL is important, now we can check if it was loaded successfully */
{
optimal = SDL_DisplayFormat (loaded); /* Load an optimised version of the basic surface */
SDL_FreeSurface (loaded); /* Delete the basic one, it's no longer needed */
}
return optimal; /* Return the optimised image */
}
/***********ALTERNATIVE, IF YOU USE SDL_IMAGE.H *************/
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
SDL_Surface *Load_Optimal (char *filename)
{
SDL_Surface *loaded = NULL; /* The surface to load the basic image */
SDL_Surface *optimal = NULL; /* The optimised surface */
loaded = IMG_Load (filename); /* Load the basic image */
if (loaded != NULL) /* This is why NULL is important, now we can check if it was loaded successfully */
{
optimal = SDL_DisplayFormat (loaded); /* Load an optimised version of the basic surface */
SDL_FreeSurface (loaded); /* Delete the basic one, it's no longer needed */
}
return optimal; /* Return the optimised image */
}

Copy & Paste

#include <SDL/SDL.h>

/* Function to load and return an optimised image
 * using the SDL graphics libraries
 * author: Danny Battison
 * contact: gabehabe@hotmail.com
 */

SDL_Surface *Load_Optimal (char *filename)
{
    SDL_Surface *loaded  = NULL; /* The surface to load the basic image */
    SDL_Surface *optimal = NULL; /* The optimised surface */
    loaded = SDL_LoadBMP (filename); /* Load the basic image */
    if (loaded != NULL) /* This is why NULL is important, now we can check if it was loaded successfully */
    {
        optimal = SDL_DisplayFormat (loaded); /* Load an optimised version of the basic surface */
        SDL_FreeSurface (loaded); /* Delete the basic one, it's no longer needed */
    }
    return optimal; /* Return the optimised image */
}

/***********ALTERNATIVE, IF YOU USE SDL_IMAGE.H *************/
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>

SDL_Surface *Load_Optimal (char *filename)
{
    SDL_Surface *loaded  = NULL; /* The surface to load the basic image */
    SDL_Surface *optimal = NULL; /* The optimised surface */
    loaded = IMG_Load (filename); /* Load the basic image */
    if (loaded != NULL) /* This is why NULL is important, now we can check if it was loaded successfully */
    {
        optimal = SDL_DisplayFormat (loaded); /* Load an optimised version of the basic surface */
        SDL_FreeSurface (loaded); /* Delete the basic one, it's no longer needed */
    }
    return optimal; /* Return the optimised image */
}