/background.cpp

//
//  background.cpp
//  openni_skeleton
//
//  Created by ??? ?? on 11/11/03.
//  Copyright 2011? __MyCompanyName__. All rights reserved.
//

#include <iostream>


#include "background.h"




bool transBackground( IplImage *initImage, IplImage *endImage, IplImage *dstImage, int startTime, int endTime, int currentTime){
    //int startTime = ;
    
    if( endTime < currentTime){
        return true;
    }
    
    cvAddWeighted(initImage, (double)(endTime - currentTime)/(double)(endTime - startTime), endImage, 1.0 - (double)(endTime - currentTime)/(double)TRANS_TIME, 0.0, dstImage);
    
    return false;
}


bool scrollBackground( IplImage *scrollImage, IplImage *dstImage, int startTime, int endTime, int currentTime){
    
    if( endTime < currentTime){
        return true;
    }
    
    cvSetImageROI( scrollImage, cvRect( (1.0 - (double)(endTime - currentTime)/(double)(endTime - startTime))*dstImage->width, 0, dstImage->width, dstImage->height));
    cvCopy( scrollImage, dstImage);
    
    cvResetImageROI( scrollImage);
    return false;
    
}


void initScrollBackground( IplImage* scrollImage, IplImage* bgImage, IplImage* endImage, int *backnum, bool *bScrollBackground, int *startCount, int *endCount, int count, string dir_path){
    initScrollBackground( scrollImage, bgImage, endImage, backnum, bScrollBackground, startCount, endCount, count, dir_path, SCROLL_TIME);
}

// ?????????????
void initScrollBackground( IplImage* scrollImage, IplImage* bgImage, IplImage* endImage, int *backnum, bool *bScrollBackground, int *startCount, int *endCount, int count, string dir_path, int time){
    *bScrollBackground = 1;
    *endCount = count + time;
    *startCount = count;
    
    //endImage?????
    (*backnum)++;
    if (*backnum > BACK_MAX) {
        *backnum = 1;
    }
    
    char bgstr[1000];
    sprintf(bgstr, "%d", *backnum);
    string bgname = dir_path + BACK_DIR + bgstr + ".jpg";
   
    endImage = cvLoadImage( bgname.c_str() , CV_LOAD_IMAGE_ANYDEPTH | CV_LOAD_IMAGE_ANYCOLOR);
    
    
    cvSetImageROI( scrollImage, cvRect( 0, 0, endImage->width, endImage->height));
    cvCopy( bgImage, scrollImage);
    
    cvSetImageROI( scrollImage, cvRect( endImage->width, 0, endImage->width, endImage->height));
    cvCopy( endImage, scrollImage);
    
    cvResetImageROI(scrollImage);
}

// ??????????????
void initTransBackground( IplImage* initImage, IplImage** endImage, IplImage* bImage, int *backnum, bool *bTransBackground, int *startCount, int *endCount, int count, string dir_path){
    initTransBackground( initImage, endImage, bImage, backnum, bTransBackground, startCount, endCount, count, dir_path, TRANS_TIME);
}

void initTransBackground( IplImage* initImage, IplImage** endImage, IplImage* bImage, int *backnum, bool *bTransBackground, int *startCount, int *endCount, int count, string dir_path, int time){
    *bTransBackground = 1;
    *endCount = count + time;
    *startCount = count;
    
    cvCopy(bImage, initImage);
    
    //endImage?????
    (*backnum)++;
    if (*backnum > BACK_MAX) {
        *backnum = 1;
    }
    
    char bgstr[1000];
    sprintf(bgstr, "%d", *backnum);
    string bgname = dir_path + BACK_DIR + bgstr + ".jpg";
    
    *endImage = cvLoadImage( bgname.c_str() , CV_LOAD_IMAGE_ANYDEPTH | CV_LOAD_IMAGE_ANYCOLOR);
}   

//????????
void changeBackground( IplImage** bgImage, int *backnum, string dir_path){
    
    (*backnum)++;
    if (*backnum > BACK_MAX) {
        *backnum = 1;
    }
    
    // ???????
    char bgstr[1000];
    sprintf(bgstr, "%d", *backnum);
    string bgname = dir_path + BACK_DIR + bgstr + ".jpg";
    
    *bgImage = cvLoadImage( bgname.c_str() , CV_LOAD_IMAGE_ANYDEPTH | CV_LOAD_IMAGE_ANYCOLOR);
    
}

void continueChangeBackground( std::vector<BgElement>* bgList, int *backnum, string dir_path){
    
    
    int fileCount = 5;
    int bgCount = 9;
    int changeTypeCount = 2;
    
    int timeArray[] = { 3, 5, 7, 10, 15 };
    //int fileNameArray[] = {1, 3, 5, 6, 7};
    
    
    for ( int i=0; i<fileCount; i++) {
        //????
    
        BgElement bg = { timeArray[rand()%fileCount], rand()%bgCount , 1 };
        bgList->push_back( bg);
    

    }    
    
}


bool startChangeBackground( IplImage* scrollImage, IplImage* bgImage, IplImage* startImage, IplImage** endImage, 
                           int *backnum, bool *bTransBackground,  bool *bScrollBackground, int *startCount, int *endCount, int count, string dir_path, std::vector<BgElement>* bgList){
    
    if(bgList->size() <= 0){
        return true;
    }
    
    *backnum = bgList->at(0).file_num;
    
    //change_type ?0????Trans
    if( bgList->at(0).change_type == 0){
        initTransBackground( startImage, endImage, bgImage, backnum, bTransBackground, startCount,  endCount, count, dir_path);
    }else{
     //change_type ?1????Scroll
        initScrollBackground( scrollImage, bgImage, *endImage, backnum, bScrollBackground, startCount, endCount, count, dir_path, bgList->at(0).time);        
    }

    bgList->erase( bgList->begin());
    return false;
}