#include "rescaler.h"

SDL_Surface *screensurface;




void hInit_rescaler(SDL_Surface *screen){
	screensurface=screen;
	return;
}



void hSDL_UpdateRect(SDL_Surface *surface, Sint32 x, Sint32 y, Sint32 w, Sint32 h){
	int m,n;
	int a, b,bb, sa=0, sb=0,t;
	
	m=y;
	a=(int)(y*0.857143); //Cada 6
	bb=(int)(x*0.952381);//Cada 20
	while(m<y+h){
		if (sa != 6){
			n=x*4;
			b=bb*4;
			
			t=(x+w)*4;		
			while(n<t){			
				if(sb != 20){
					*(Uint32*) //We copy data in chunks of 4 bytes
					(
						( char* )screensurface->pixels + //We start from pixel 0x0 of the surface, and use chars to move byte by byte
						( screensurface->pitch * a ) +  b  //Where is the pixel we are interested in writing
					)
					= //The pixel from below will get assigned to the pixel from above
					*(Uint32*) 
					(
						( char* )surface->pixels + 
						( surface->pitch * m ) +  n 
					);
					b+=4;
					sb++;
				}else{
					sb=0;
				}
				n+=4;
			}		
			
			a++;
			sa++;
		}else{
			sa=0;
		}
		m++;
	}
	SDL_UpdateRect(screensurface, (int)(x*0.952381), (int)(y*0.857143), (int)(w*0.952381), (int)(h*0.857143));
	return;
}
/*
void hSDL_UpdateRect(SDL_Surface *surface, Sint32 x, Sint32 y, Sint32 w, Sint32 h){
	int n,m;
	float fn, fm;
	
	m=y;
	fm=y*0.857143;

	while(m<y+h){
	
		n=x;
		fn=x*0.952381;
		while(n<x+w){			

			*(Uint32*) //We copy data in chunks of 4 bytes
			(
				( char* )screensurface->pixels + //We start from pixel 0x0 of the surface, and use chars to move byte by byte
				( screensurface->pitch * (int)fm ) + ( 4 * (int)fn ) //Where is the pixel we are interested in writing
			)
			= //The pixel from below will get assigned to the pixel from above
			*(Uint32*) 
			(
				( char* )surface->pixels + 
				( surface->pitch * m ) + ( 4 * n )
			);

			n++;
			fn+=0.952381;
		}		
		m++;
		fm+=0.857143;
	}

	SDL_UpdateRect(screensurface, (int)(x*0.952381), (int)(y*0.857143), (int)(w*0.952381), (int)(h*0.857143));
	return;
}
*/
int hSDL_Flip(SDL_Surface* screen){
	return SDL_Flip(screensurface);
}