smooth.c

SSD6 练习5的原版正确答案

#include <stdio.h>
#include <stdlib.h>
#include "defs.h"
#include "cache.h"




/* Here is an our naive implementation */
char smooth_descr[] = "SMOOTH: Naive Row-wise Traversal of src";
void smooth(int dim, pixel *src, pixel *dst) {
	int i, j;
	for(i=0; i<dim;i++) {
		COPY(&dst[PIXEL(i,0,dim)], &src[PIXEL(i,0,dim)]);
		COPY(&dst[PIXEL(i,dim-1,dim)], &src[PIXEL(i,dim-1,dim)]);
	}
	for(j=1; j<dim-1;j++) {
		COPY(&dst[PIXEL(0,j,dim)], &src[PIXEL(0,j,dim)]);
		COPY(&dst[PIXEL(dim-1,j,dim)], &src[PIXEL(dim-1,j,dim)]);
	}
	for(i=1; i<dim-1; i++) {
		for(j=1; j<dim-1; j++) {
			SMOOTH(&dst[PIXEL(j,i,dim)],
					&src[PIXEL(j,i,dim)],
					&src[PIXEL(j-1,i,dim)],
					&src[PIXEL(j+1,i,dim)],
					&src[PIXEL(j,i+1,dim)],
					&src[PIXEL(j,i-1,dim)],
					&src[PIXEL(j-1,i-1,dim)],
					&src[PIXEL(j+1,i+1,dim)],
					&src[PIXEL(j-1,i+1,dim)],
					&src[PIXEL(j+1,i-1,dim)]);
		}
	}
	return;
}


/* Add additional functions to test here */
void register_smooth_functions() {
	add_smooth_function(&smooth, smooth_descr);
}