animatedimage.cpp

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#include <SDL/SDL.h>
#include <SDL/SDL_image.h>

#include "constants.h"
#include "animatedimage.h"

AnimatedImage :: AnimatedImage( string file, int nFrames )
{
        nrFrames = nFrames;
        currentFrame = 0;

        // Load image
        image = IMG_Load( (const char *)file.c_str() );
        if ( !image )
        {
                nrFrames = 0;
                image = 0;
                return;
        }

        SDL_SetColorKey(image, SDL_SRCCOLORKEY | SDL_RLEACCEL, SDL_MapRGB( image->format, 0, 0, 0 ) );
        frameWidth = image->w/nrFrames;
        frameHeight = image->h;
}

AnimatedImage :: ~AnimatedImage()
{
        if ( image != 0 )
                SDL_FreeSurface( image );
}

bool AnimatedImage :: nextFrame()
{
        bool rc = true;
        currentFrame ++;
        if ( currentFrame >= nrFrames )
        {
                currentFrame --;
                rc = false;
        }

        return rc;
}

void AnimatedImage :: draw( SDL_Surface *screen, int x, int y )
{
        if ( !image )
                return;

        SDL_Rect dst;
        dst.x = currentFrame * frameWidth;
        dst.y = 0;
        dst.w = frameWidth;
        dst.h = frameHeight;

        SDL_Rect dst2;
        dst2.x = x - (frameWidth/2);
        dst2.y = y - (frameHeight/2);;
        SDL_BlitSurface( image, &dst, screen, &dst2 );
}

bool AnimatedImage :: AtEnd()
{
        if ( currentFrame +1 >= nrFrames || image == 0 )
                return true;
        return false;
}

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